Commit Graph

2463 Commits

Author SHA1 Message Date
Arnd Bergmann
84fc863606 ARM: make ARCH_MULTIPLATFORM user-visible
Some options like CONFIG_DEBUG_UNCOMPRESS and CONFIG_CMDLINE_FORCE are
fundamentally incompatible with portable kernels but are currently allowed
in all configurations. Other options like XIP_KERNEL are essentially
useless after the completion of the multiplatform conversion.

Repurpose the existing CONFIG_ARCH_MULTIPLATFORM option to decide
whether the resulting kernel image is meant to be portable or not,
and using this to guard all of the known incompatible options.

This is similar to how the RISC-V kernel handles the CONFIG_NONPORTABLE
option (with the opposite polarity).

A few references to CONFIG_ARCH_MULTIPLATFORM were left behind by
earlier clanups and have to be removed now up.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-08-30 11:18:09 +02:00
Arnd Bergmann
5408445b1e ARM: fix XIP_KERNEL dependencies
CONFIG_XIP_KERNEL does not work with any option that involves patching
the read-only kernel .text.

Since at least CONFIG_SMP_ON_UP is required in certain configurations,
flip the dependency to always allow the .text patching options but make
XIP_KERNEL have the dependency instead.

This is a prerequisite for allowing CONFIG_ARCH_MULTIPLATFORM to
be disabled.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-08-30 11:18:06 +02:00
Robert Elliott
4a329fecc9 crypto: Kconfig - submenus for arm and arm64
Move ARM- and ARM64-accelerated menus into a submenu under
the Crypto API menu (paralleling all the architectures).

Make each submenu always appear if the corresponding architecture
is supported. Get rid of the ARM_CRYPTO and ARM64_CRYPTO symbols.

The "ARM Accelerated" or "ARM64 Accelerated" entry disappears from:
    General setup  --->
    Platform selection  --->
    Kernel Features  --->
    Boot options  --->
    Power management options  --->
    CPU Power Management  --->
[*] ACPI (Advanced Configuration and Power Interface) Support  --->
[*] Virtualization  --->
[*] ARM Accelerated Cryptographic Algorithms  --->
     (or)
[*] ARM64 Accelerated Cryptographic Algorithms  --->
    ...
-*- Cryptographic API  --->
    Library routines  --->
    Kernel hacking  --->

and moves into the Cryptographic API menu, which now contains:
      ...
      Accelerated Cryptographic Algorithms for CPU (arm) --->
      (or)
      Accelerated Cryptographic Algorithms for CPU (arm64) --->
[*]   Hardware crypto devices  --->
      ...

Suggested-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Robert Elliott <elliott@hpe.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2022-08-26 18:50:41 +08:00
Arnd Bergmann
6fd09c9afa ARM: Kconfig: clean up platform selection
The top-level platform selection is mostly meaningless these days after
almost everything is sorted below the CONFIG_ARCH_MULTIPLATFORM, with
the only exception being the 20+ year old StrongARM based machines.

Make this more consistent by removing the entire choice statement and
moving the StrongARM specific options into regular platform specific
Kconfig files.

The three platforms (footbridge, rpc and sa1100) are still mutually
exclusive and cannot coexist with other ARMv4/v5 machines, but since
there are only three of them and we will not add more, this can be
expressed using Kconfig 'depends on' statements.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-08-18 16:44:59 +02:00
Arnd Bergmann
92481c7d14 ARM: remove obsolete Makefile.boot infrastructure
There are a number of old Makefile.boot files that remain from the
multiplatform conversion, and three that are still in use.

These provide the "ZRELADDR", "PARAMS_PHYS" and "INITRD_PHYS" values
that are platform specific. It turns out that we can generally just
derive this from information that is available elsewhere:

- ZRELADDR is normally detected at runtime with the
  CONFIG_AUTO_ZRELADDR flag, but also needed to be passed to
  for 'make uImage'. In a multiplatform kernel, one always has
  to pass this as the $(LOADADDR) variable, but in the StrongARM
  kernels we can derive it from the sum of $(CONFIG_PHYS_OFFSET)
  and $(TEXT_OFFSET) that are already known.

- PARAMS_PHYS and INITRD_PHYS are only used for bootpImage, which
  in turn is only used for the pre-ATAGS 'param_struct' based boot
  interface on StrongARM based machines with old boot loaders.
  They can both be derived from CONFIG_PHYS_OFFSET and a machine
  specific offset for the initrd, so all of the logic for these
  can be part of arch/arm/boot/bootp/Makefile.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-08-18 16:44:59 +02:00
Linus Torvalds
c993e07be0 dma-mapping updates
- convert arm32 to the common dma-direct code (Arnd Bergmann, Robin Murphy,
    Christoph Hellwig)
  - restructure the PCIe peer to peer mapping support (Logan Gunthorpe)
  - allow the IOMMU code to communicate an optional DMA mapping length
    and use that in scsi and libata (John Garry)
  - split the global swiotlb lock (Tianyu Lan)
  - various fixes and cleanup (Chao Gao, Dan Carpenter, Dongli Zhang,
    Lukas Bulwahn, Robin Murphy)
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Merge tag 'dma-mapping-5.20-2022-08-06' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping updates from Christoph Hellwig:

 - convert arm32 to the common dma-direct code (Arnd Bergmann, Robin
   Murphy, Christoph Hellwig)

 - restructure the PCIe peer to peer mapping support (Logan Gunthorpe)

 - allow the IOMMU code to communicate an optional DMA mapping length
   and use that in scsi and libata (John Garry)

 - split the global swiotlb lock (Tianyu Lan)

 - various fixes and cleanup (Chao Gao, Dan Carpenter, Dongli Zhang,
   Lukas Bulwahn, Robin Murphy)

* tag 'dma-mapping-5.20-2022-08-06' of git://git.infradead.org/users/hch/dma-mapping: (45 commits)
  swiotlb: fix passing local variable to debugfs_create_ulong()
  dma-mapping: reformat comment to suppress htmldoc warning
  PCI/P2PDMA: Remove pci_p2pdma_[un]map_sg()
  RDMA/rw: drop pci_p2pdma_[un]map_sg()
  RDMA/core: introduce ib_dma_pci_p2p_dma_supported()
  nvme-pci: convert to using dma_map_sgtable()
  nvme-pci: check DMA ops when indicating support for PCI P2PDMA
  iommu/dma: support PCI P2PDMA pages in dma-iommu map_sg
  iommu: Explicitly skip bus address marked segments in __iommu_map_sg()
  dma-mapping: add flags to dma_map_ops to indicate PCI P2PDMA support
  dma-direct: support PCI P2PDMA pages in dma-direct map_sg
  dma-mapping: allow EREMOTEIO return code for P2PDMA transfers
  PCI/P2PDMA: Introduce helpers for dma_map_sg implementations
  PCI/P2PDMA: Attempt to set map_type if it has not been set
  lib/scatterlist: add flag for indicating P2PDMA segments in an SGL
  swiotlb: clean up some coding style and minor issues
  dma-mapping: update comment after dmabounce removal
  scsi: sd: Add a comment about limiting max_sectors to shost optimal limit
  ata: libata-scsi: cap ata_device->max_sectors according to shost->max_sectors
  scsi: scsi_transport_sas: cap shost opt_sectors according to DMA optimal limit
  ...
2022-08-06 10:56:45 -07:00
Linus Torvalds
995177a4c7 ARM development updates for 5.20-rc1
Not much this time around, the 5.20-rc1 development updates for arm are:
 - add KASAN support for vmalloc space on arm
 - some sparse fixes from Ben Dooks
 - rework amba device handling (so device addition isn't deferred)
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM updates from Russell King:
 "Not much this time around, the 5.20-rc1 development updates for arm
  are:

   - add KASAN support for vmalloc space on arm

   - some sparse fixes from Ben Dooks

   - rework amba device handling (so device addition isn't deferred)"

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 9220/1: amba: Remove deferred device addition
  ARM: 9219/1: fix undeclared soft_restart
  ARM: 9218/1: dma-mapping: fix pointer/integer warning
  ARM: 9217/1: add definition of arch_irq_work_raise()
  ARM: 9203/1: kconfig: fix MODULE_PLTS for KASAN with KASAN_VMALLOC
  ARM: 9202/1: kasan: support CONFIG_KASAN_VMALLOC
2022-08-04 15:31:09 -07:00
Linus Torvalds
7d9d077c78 RCU pull request for v5.20 (or whatever)
This pull request contains the following branches:
 
 doc.2022.06.21a: Documentation updates.
 
 fixes.2022.07.19a: Miscellaneous fixes.
 
 nocb.2022.07.19a: Callback-offload updates, perhaps most notably a new
 	RCU_NOCB_CPU_DEFAULT_ALL Kconfig option that causes all CPUs to
 	be offloaded at boot time, regardless of kernel boot parameters.
 	This is useful to battery-powered systems such as ChromeOS
 	and Android.  In addition, a new RCU_NOCB_CPU_CB_BOOST kernel
 	boot parameter prevents offloaded callbacks from interfering
 	with real-time workloads and with energy-efficiency mechanisms.
 
 poll.2022.07.21a: Polled grace-period updates, perhaps most notably
 	making these APIs account for both normal and expedited grace
 	periods.
 
 rcu-tasks.2022.06.21a: Tasks RCU updates, perhaps most notably reducing
 	the CPU overhead of RCU tasks trace grace periods by more than
 	a factor of two on a system with 15,000 tasks.	The reduction
 	is expected to increase with the number of tasks, so it seems
 	reasonable to hypothesize that a system with 150,000 tasks might
 	see a 20-fold reduction in CPU overhead.
 
 torture.2022.06.21a: Torture-test updates.
 
 ctxt.2022.07.05a: Updates that merge RCU's dyntick-idle tracking into
 	context tracking, thus reducing the overhead of transitioning to
 	kernel mode from either idle or nohz_full userspace execution
 	for kernels that track context independently of RCU.  This is
 	expected to be helpful primarily for kernels built with
 	CONFIG_NO_HZ_FULL=y.
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Merge tag 'rcu.2022.07.26a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu

Pull RCU updates from Paul McKenney:

 - Documentation updates

 - Miscellaneous fixes

 - Callback-offload updates, perhaps most notably a new
   RCU_NOCB_CPU_DEFAULT_ALL Kconfig option that causes all CPUs to be
   offloaded at boot time, regardless of kernel boot parameters.

   This is useful to battery-powered systems such as ChromeOS and
   Android. In addition, a new RCU_NOCB_CPU_CB_BOOST kernel boot
   parameter prevents offloaded callbacks from interfering with
   real-time workloads and with energy-efficiency mechanisms

 - Polled grace-period updates, perhaps most notably making these APIs
   account for both normal and expedited grace periods

 - Tasks RCU updates, perhaps most notably reducing the CPU overhead of
   RCU tasks trace grace periods by more than a factor of two on a
   system with 15,000 tasks.

   The reduction is expected to increase with the number of tasks, so it
   seems reasonable to hypothesize that a system with 150,000 tasks
   might see a 20-fold reduction in CPU overhead

 - Torture-test updates

 - Updates that merge RCU's dyntick-idle tracking into context tracking,
   thus reducing the overhead of transitioning to kernel mode from
   either idle or nohz_full userspace execution for kernels that track
   context independently of RCU.

   This is expected to be helpful primarily for kernels built with
   CONFIG_NO_HZ_FULL=y

* tag 'rcu.2022.07.26a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (98 commits)
  rcu: Add irqs-disabled indicator to expedited RCU CPU stall warnings
  rcu: Diagnose extended sync_rcu_do_polled_gp() loops
  rcu: Put panic_on_rcu_stall() after expedited RCU CPU stall warnings
  rcutorture: Test polled expedited grace-period primitives
  rcu: Add polled expedited grace-period primitives
  rcutorture: Verify that polled GP API sees synchronous grace periods
  rcu: Make Tiny RCU grace periods visible to polled APIs
  rcu: Make polled grace-period API account for expedited grace periods
  rcu: Switch polled grace-period APIs to ->gp_seq_polled
  rcu/nocb: Avoid polling when my_rdp->nocb_head_rdp list is empty
  rcu/nocb: Add option to opt rcuo kthreads out of RT priority
  rcu: Add nocb_cb_kthread check to rcu_is_callbacks_kthread()
  rcu/nocb: Add an option to offload all CPUs on boot
  rcu/nocb: Fix NOCB kthreads spawn failure with rcu_nocb_rdp_deoffload() direct call
  rcu/nocb: Invert rcu_state.barrier_mutex VS hotplug lock locking order
  rcu/nocb: Add/del rdp to iterate from rcuog itself
  rcu/tree: Add comment to describe GP-done condition in fqs loop
  rcu: Initialize first_gp_fqs at declaration in rcu_gp_fqs()
  rcu/kvfree: Remove useless monitor_todo flag
  rcu: Cleanup RCU urgency state for offline CPU
  ...
2022-08-02 19:12:45 -07:00
Linus Torvalds
7d0d3fa733 ARM: boardfile deprecation for 6.0
Over the past ten years, new machine support was based on device tree,
 and an initial set of about 400 boards using ATAGS with boardfile
 for booting were grandfathered in, with about half of them either
 removed or converted to DT over time.
 
 Based on the recent mailing list discussion I started, I have now
 turned the findings into a set of patches that marks most board files as
 'depends on UNUSED_BOARD_FILES', leaving only 38 of the 196 boards.
 
 For the boards that are marked as unused, there are two final chances
 for potential users: The removal is scheduled to take place after the
 longterm stable kernel at the end of 2022, so users can stay on that
 version for another few years, and if anyone still has one of these
 machines and is planning to keep updating kernels beyond that version,
 they can speak up now to have their boards taken off the list again.
 
 Waiting for the LTS release also makes sure that there will be at
 least one longterm kernel that contains the recent multiplatform
 conversion along while still supporting all legacy boards.
 
 The short summary of the current status is:
 
  - The s3c24xx, cns3xxx, iop32x and mv78xx0 platforms have no known
    users and will be removed entirely.
 
  - The mmp and davinci platforms have DT support for the important
    machines and will become DT-only after this.
 
  - s3c64xx, dove, orion5x, and pxa keep some board files to allow
    those to be migrated over to DT more easily, but most board files
    are getting removed now. DT support on these platforms is partially
    working but requires changes to additional drivers for the other
    boards.
 
  - omap1, ep93xx, sa1100, footbridge and rpc have no DT support at
    the moment but have some boards with known users. Removing the board
    files that nobody uses should make it easier to try a DT conversion
    if anyone cares.
 
 There is no explicit timeline what happens with the boards that remain
 after this removal, but I expect to revisit this in the future, and
 with most boards gone, there will be a good time to do a treewide
 review of platform drivers that never gained DT support and have no
 remaining in-tree board files.
 
 Link: https://lore.kernel.org/linux-arm-kernel/CAK8P3a0Z9vGEQbVRBo84bSyPFM-LF+hs5w8ZA51g2Z+NsdtDQA@mail.gmail.com/
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Merge tag 'arm-boardfiles-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM boardfile deprecation from Arnd Bergmann:
 "Over the past ten years, new machine support was based on device tree,
  and an initial set of about 400 boards using ATAGS with boardfile for
  booting were grandfathered in, with about half of them either removed
  or converted to DT over time.

  Based on the recent mailing list discussion I started, I have now
  turned the findings into a set of patches that marks most board files
  as 'depends on UNUSED_BOARD_FILES', leaving only 38 of the 196 boards.

  For the boards that are marked as unused, there are two final chances
  for potential users: The removal is scheduled to take place after the
  longterm stable kernel at the end of 2022, so users can stay on that
  version for another few years, and if anyone still has one of these
  machines and is planning to keep updating kernels beyond that version,
  they can speak up now to have their boards taken off the list again.

  Waiting for the LTS release also makes sure that there will be at
  least one longterm kernel that contains the recent multiplatform
  conversion along while still supporting all legacy boards.

  The short summary of the current status is:

   - The s3c24xx, cns3xxx, iop32x and mv78xx0 platforms have no known
     users and will be removed entirely.

   - The mmp and davinci platforms have DT support for the important
     machines and will become DT-only after this.

   - s3c64xx, dove, orion5x, and pxa keep some board files to allow
     those to be migrated over to DT more easily, but most board files
     are getting removed now. DT support on these platforms is partially
     working but requires changes to additional drivers for the other
     boards.

   - omap1, ep93xx, sa1100, footbridge and rpc have no DT support at the
     moment but have some boards with known users. Removing the board
     files that nobody uses should make it easier to try a DT conversion
     if anyone cares.

  There is no explicit timeline what happens with the boards that remain
  after this removal, but I expect to revisit this in the future, and
  with most boards gone, there will be a good time to do a treewide
  review of platform drivers that never gained DT support and have no
  remaining in-tree board files"

Link: https://lore.kernel.org/linux-arm-kernel/CAK8P3a0Z9vGEQbVRBo84bSyPFM-LF+hs5w8ZA51g2Z+NsdtDQA@mail.gmail.com/

* tag 'arm-boardfiles-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: cns3xxx: add CONFIG_UNUSED_BOARD_FILES dependency
  ARM: iop32x: mark as unused
  ARM: s3c: mark most board files as unused
  ARM: omap1: add Kconfig dependencies for unused boards
  ARM: sa1100: mark most boards as unused
  ARM: footbridge: mark cats board for removal
  ARM: mmp: mark all board files for removal
  ARM: ep93xx: mark most board files as unused
  ARM: davinci: mark all ATAGS board files as unused
  ARM: orion: add ATAGS dependencies
  ARM: pxa: add Kconfig dependencies for ATAGS based boards
  ARM: add CONFIG_UNUSED_BOARD_FILES
  ARM: add ATAGS dependencies to non-DT platforms
2022-08-02 08:35:17 -07:00
Lecopzer Chen
8fa7ea40bf ARM: 9203/1: kconfig: fix MODULE_PLTS for KASAN with KASAN_VMALLOC
When we run out of module space address with ko insertion,
and with MODULE_PLTS, module would turn to try to find memory
from VMALLOC address space.

Unfortunately, with KASAN enabled, VMALLOC doesn't work without
KASAN_VMALLOC, thus select KASAN_VMALLOC by default.

8<--- cut here ---
 Unable to handle kernel paging request at virtual address bd300860
 [bd300860] *pgd=41cf1811, *pte=41cf26df, *ppte=41cf265f
 Internal error: Oops: 80f [#1] PREEMPT SMP ARM
 Modules linked in: hello(O+)
 CPU: 0 PID: 89 Comm: insmod Tainted: G           O      5.16.0-rc6+ #19
 Hardware name: Generic DT based system
 PC is at mmioset+0x30/0xa8
 LR is at 0x0
 pc : [<c077ed30>]    lr : [<00000000>]    psr: 20000013
 sp : c451fc18  ip : bd300860  fp : c451fc2c
 r10: f18042cc  r9 : f18042d0  r8 : 00000000
 r7 : 00000001  r6 : 00000003  r5 : 01312d00  r4 : f1804300
 r3 : 00000000  r2 : 00262560  r1 : 00000000  r0 : bd300860
 Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
 Control: 10c5387d  Table: 43e9406a  DAC: 00000051
 Register r0 information: non-paged memory
 Register r1 information: NULL pointer
 Register r2 information: non-paged memory
 Register r3 information: NULL pointer
 Register r4 information: 4887-page vmalloc region starting at 0xf1802000 allocated at load_module+0x14f4/0x32a8
 Register r5 information: non-paged memory
 Register r6 information: non-paged memory
 Register r7 information: non-paged memory
 Register r8 information: NULL pointer
 Register r9 information: 4887-page vmalloc region starting at 0xf1802000 allocated at load_module+0x14f4/0x32a8
 Register r10 information: 4887-page vmalloc region starting at 0xf1802000 allocated at load_module+0x14f4/0x32a8
 Register r11 information: non-slab/vmalloc memory
 Register r12 information: non-paged memory
 Process insmod (pid: 89, stack limit = 0xc451c000)
 Stack: (0xc451fc18 to 0xc4520000)
 fc00:                                                       f18041f0 c04803a4
 fc20: c451fc44 c451fc30 c048053c c0480358 f1804030 01312cff c451fc64 c451fc48
 fc40: c047f330 c0480500 f18040c0 c1b52ccc 00000001 c5be7700 c451fc74 c451fc68
 fc60: f1802098 c047f300 c451fcb4 c451fc78 c026106c f180208c c4880004 00000000
 fc80: c451fcb4 bf001000 c044ff48 c451fec0 f18040c0 00000000 c1b54cc4 00000000
 fca0: c451fdf0 f1804268 c451fe64 c451fcb8 c0264e88 c0260d48 ffff8000 00007fff
 fcc0: f18040c0 c025cd00 c451fd14 00000003 0157f008 f1804258 f180425c f1804174
 fce0: f1804154 f180424c f18041f0 f180414c f1804178 f18041c0 bf0025d4 188a3fa8
 fd00: 0000009e f1804170 f2b18000 c451ff10 c0d92e40 f180416c c451feec 00000001
 fd20: 00000000 c451fec8 c451fe20 c451fed0 f18040cc 00000000 f17ea000 c451fdc0
 fd40: 41b58ab3 c1387729 c0261c28 c047fb5c c451fe2c c451fd60 c0525308 c048033c
 fd60: 188a3fb4 c3ccb090 c451fe00 c3ccb080 00000000 00000000 00016920 00000000
 fd80: c02d0388 c047f55c c02d0388 00000000 c451fddc c451fda0 c02d0388 00000000
 fda0: 41b58ab3 c13a72d0 c0524ff0 c1705f48 c451fdfc c451fdc0 c02d0388 c047f55c
 fdc0: 00016920 00000000 00000003 c1bb2384 c451fdfc c3ccb080 c1bb2384 00000000
 fde0: 00000000 00000000 00000000 00000000 c451fe1c c451fe00 c04e9d70 c1705f48
 fe00: c1b54cc4 c1bbc71c c3ccb080 00000000 c3ccb080 00000000 00000003 c451fec0
 fe20: c451fe64 c451fe30 c0525918 c0524ffc c451feb0 c1705f48 00000000 c1b54cc4
 fe40: b78a3fd0 c451ff60 00000000 0157f008 00000003 c451fec0 c451ffa4 c451fe68
 fe60: c0265480 c0261c34 c451feb0 7fffffff 00000000 00000002 00000000 c4880000
 fe80: 41b58ab3 c138777b c02652cc c04803ec 000a0000 c451ff00 ffffff9c b6ac9f60
 fea0: c451fed4 c1705f48 c04a4a90 b78a3fdc f17ea000 ffffff9c b6ac9f60 c0100244
 fec0: f17ea21a f17ea300 f17ea000 00016920 f1800240 f18000ac f17fb7dc 01316000
 fee0: 013161b0 00002590 01316250 00000000 00000000 00000000 00002580 00000029
 ff00: 0000002a 00000013 00000000 0000000c 00000000 00000000 0157f004 c451ffb0
 ff20: c1719be0 aed6f410 c451ff74 c451ff38 c0c4103c c0c407d0 c451ff84 c451ff48
 ff40: 00000805 c02c8658 c1604230 c1719c30 00000805 0157f004 00000005 c451ffb0
 ff60: c1719be0 aed6f410 c451ffac c451ff78 c0122130 c1705f48 c451ffac 0157f008
 ff80: 00000006 0000005f 0000017b c0100244 c4880000 0000017b 00000000 c451ffa8
 ffa0: c0100060 c02652d8 0157f008 00000006 00000003 0157f008 00000000 b6ac9f60
 ffc0: 0157f008 00000006 0000005f 0000017b 00000000 00000000 aed85f74 00000000
 ffe0: b6ac9cd8 b6ac9cc8 00030200 aecf2d60 a0000010 00000003 00000000 00000000
 Backtrace:
 [<c048034c>] (kasan_poison) from [<c048053c>] (kasan_unpoison+0x48/0x5c)
 [<c04804f4>] (kasan_unpoison) from [<c047f330>] (__asan_register_globals+0x3c/0x64)
  r5:01312cff r4:f1804030
 [<c047f2f4>] (__asan_register_globals) from [<f1802098>] (_sub_I_65535_1+0x18/0xf80 [hello])
  r7:c5be7700 r6:00000001 r5:c1b52ccc r4:f18040c0
 [<f1802080>] (_sub_I_65535_1 [hello]) from [<c026106c>] (do_init_module+0x330/0x72c)
 [<c0260d3c>] (do_init_module) from [<c0264e88>] (load_module+0x3260/0x32a8)
  r10:f1804268 r9:c451fdf0 r8:00000000 r7:c1b54cc4 r6:00000000 r5:f18040c0
  r4:c451fec0
 [<c0261c28>] (load_module) from [<c0265480>] (sys_finit_module+0x1b4/0x1e8)
  r10:c451fec0 r9:00000003 r8:0157f008 r7:00000000 r6:c451ff60 r5:b78a3fd0
  r4:c1b54cc4
 [<c02652cc>] (sys_finit_module) from [<c0100060>] (ret_fast_syscall+0x0/0x1c)
 Exception stack(0xc451ffa8 to 0xc451fff0)
 ffa0:                   0157f008 00000006 00000003 0157f008 00000000 b6ac9f60
 ffc0: 0157f008 00000006 0000005f 0000017b 00000000 00000000 aed85f74 00000000
 ffe0: b6ac9cd8 b6ac9cc8 00030200 aecf2d60
  r10:0000017b r9:c4880000 r8:c0100244 r7:0000017b r6:0000005f r5:00000006
  r4:0157f008
 Code: e92d4100 e1a08001 e1a0e003 e2522040 (a8ac410a)
 ---[ end trace df6e12843197b6f5 ]---

Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2022-07-28 15:09:13 +01:00
Lecopzer Chen
565cbaad83 ARM: 9202/1: kasan: support CONFIG_KASAN_VMALLOC
Simply make shadow of vmalloc area mapped on demand.

Since the virtual address of vmalloc for Arm is also between
MODULE_VADDR and 0x100000000 (ZONE_HIGHMEM), which means the shadow
address has already included between KASAN_SHADOW_START and
KASAN_SHADOW_END.
Thus we need to change nothing for memory map of Arm.

This can fix ARM_MODULE_PLTS with KASan, support KASan for higmem
and support CONFIG_VMAP_STACK with KASan.

Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2022-07-28 15:09:12 +01:00
Arnd Bergmann
acb926d618 ARM: add CONFIG_UNUSED_BOARD_FILES
Based on the recent mailing list discussion, most board file support
has no remaining users and can be scheduled for removal early next
year.

If a board is still found to have users, it will remain for this round
but users are encouraged to migrate to devicetree based booting where
possible.

The timing is meant to ensure the next longterm supported kernel
still contains all the board files, giving another year of support
for potential users that did not speak up and would otherwise be
stuck on the v5.15.y longterm kernel from 2021.

Link: https://lore.kernel.org/all/CAK8P3a0Z9vGEQbVRBo84bSyPFM-LF+hs5w8ZA51g2Z+NsdtDQA@mail.gmail.com/
Link: https://docs.google.com/spreadsheets/d/1PL4dUUSieeXHzZhAn_Rnix32OTiCfN33sCQejpvI6ng/edit#gid=0
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-07-22 13:11:21 +02:00
Arnd Bergmann
96a4ce30c2 ARM: add ATAGS dependencies to non-DT platforms
There are a total of eight platforms that only suppor ATAGS based boot
with board files but no devicetree booting.

For dove, the DT support is part of the mvebu platform, which shares
driver but no code in arch/arm.

Most of these will never get converted to DT, and the majority of the
board files appear to be entirely unused already. There are still known
users on a few machines, and there may be interest in converting some
omap1, ep93xx or footbridge machines over in the future.

For the moment, just add a Kconfig dependency to hide these platforms
completely when CONFIG_ATAGS is disabled, and reorder the priority
of the options: Rather than offering to turn ATAGS off for platforms
that have DT support, make it a top-level setting that determines
which platforms are visible.

The s3c24xx platform supports one machine with DT support, but it
cannot be built without also including ATAGS support, and the
entire platform is scheduled for removal, so leaving the entire
platform behind a dependency seems good enough.

All defconfig files should keep working, as the option remains default
enabled.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-07-22 13:11:21 +02:00
Qin Jian
0aa94eea8d ARM: sunplus: Add initial support for Sunplus SP7021 SoC
This patch aims to add an initial support for Sunplus SP7021 SoC.

Signed-off-by: Qin Jian <qinjian@cqplus1.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-07-08 14:24:14 +02:00
Christoph Hellwig
ae626eb973 ARM/dma-mapping: use dma-direct unconditionally
Use dma-direct unconditionally on arm.  It has already been used for
some time for LPAE and nommu configurations.

This mostly changes the streaming mapping implementation and the (simple)
coherent allocator for device that are DMA coherent.  The existing
complex allocator for uncached mappings for non-coherent devices is still
used as is using the arch_dma_alloc/arch_dma_free hooks.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Andre Przywara <andre.przywara@arm.com> [highbank]
Tested-by: Marc Zyngier <maz@kernel.org>
2022-07-07 18:18:57 +02:00
Christoph Hellwig
af6f23b88e ARM/dma-mapping: use the generic versions of dma_to_phys/phys_to_dma by default
Only the footbridge platforms provide their own DMA address translation
helpers, so switch to the generic version for all other platforms, and
consolidate the footbridge implementation to remove two levels of
indirection.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Marc Zyngier <maz@kernel.org>
2022-07-07 18:18:57 +02:00
Frederic Weisbecker
24a9c54182 context_tracking: Split user tracking Kconfig
Context tracking is going to be used not only to track user transitions
but also idle/IRQs/NMIs. The user tracking part will then become a
separate feature. Prepare Kconfig for that.

[ frederic: Apply Max Filippov feedback. ]

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Cc: Uladzislau Rezki <uladzislau.rezki@sony.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Nicolas Saenz Julienne <nsaenz@kernel.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Cc: Yu Liao <liaoyu15@huawei.com>
Cc: Phil Auld <pauld@redhat.com>
Cc: Paul Gortmaker<paul.gortmaker@windriver.com>
Cc: Alex Belits <abelits@marvell.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Nicolas Saenz Julienne <nsaenzju@redhat.com>
Tested-by: Nicolas Saenz Julienne <nsaenzju@redhat.com>
2022-06-29 17:04:09 -07:00
Arnd Bergmann
7036440eab ARM: omap1: enable multiplatform
With all the header files out of the way, and the clock driver
converted to the common framework, nothing stops us from building
OMAP together with the other platforms.

As usual, the decompressor support is a victim here, and is
only available when CONFIG_DEBUG_LL is configured for the
particular board.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-06-03 20:48:53 +02:00
Linus Torvalds
09a018176b ARM: SoC changes, part 2
This is the second part of the general SoC updates, containing
 everything that did not make it in the initial pull request,
 or that came in as a bugfix later.
 
  - Devicetree updates for SoCFPGA, ASPEED, AT91 and Rockchip, including
    a new machine using an ASPEED BMC.
 
  - More DT fixes from Krzysztof Kozlowski across platforms
 
  - A new SoC platform for the GXP baseboard management controller,
    used in current server products from HPE.
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Merge tag 'arm-late-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull more ARM SoC updates from Arnd Bergmann:
 "This is the second part of the general SoC updates, containing
  everything that did not make it in the initial pull request, or that
  came in as a bugfix later.

   - Devicetree updates for SoCFPGA, ASPEED, AT91 and Rockchip,
     including a new machine using an ASPEED BMC.

   - More DT fixes from Krzysztof Kozlowski across platforms

   - A new SoC platform for the GXP baseboard management controller,
     used in current server products from HPE"

* tag 'arm-late-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (56 commits)
  ARM: configs: Enable more audio support for i.MX
  tee: optee: Pass a pointer to virt_addr_valid()
  arm64: dts: rockchip: rename Quartz64-A bluetooth gpios
  arm64: dts: rockchip: add clocks property to cru node rk3368
  arm64: dts: rockchip: add clocks property to cru node rk3308
  arm64: dts: rockchip: add clocks to rk356x cru
  ARM: dts: rockchip: add clocks property to cru node rk3228
  ARM: dts: rockchip: add clocks property to cru node rk3036
  ARM: dts: rockchip: add clocks property to cru node rk3066a/rk3188
  ARM: dts: rockchip: add clocks property to cru node rk3288
  ARM: dts: rockchip: Remove "amba" bus nodes from rv1108
  ARM: dts: rockchip: add clocks property to cru node rv1108
  arm64: dts: sprd: use new 'dma-channels' property
  ARM: dts: da850: use new 'dma-channels' property
  ARM: dts: pxa: use new 'dma-channels/requests' properties
  soc: ixp4xx/qmgr: Fix unused match warning
  ARM: ep93xx: Make ts72xx_register_flash() static
  ARM: configs: enable support for Kontron KSwitch D10
  ep93xx: clock: Do not return the address of the freed memory
  arm64: dts: intel: add device tree for n6000
  ...
2022-06-02 15:27:44 -07:00
Linus Torvalds
96479c0980 ARM: multiplatform changes, part 2
The second part of the multiplatform changes now converts the
 Intel/Marvell PXA platform along with the rest. The patches went through
 several rebases before the merge window as bugs were found, so they
 remained separate.
 
 This has to touch a lot of drivers, in particular the touchscreen,
 pcmcia, sound and clk bits, to detach the driver files from the
 platform and board specific header files.
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Merge tag 'arm-multiplatform-5.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull more ARM multiplatform updates from Arnd Bergmann:
 "The second part of the multiplatform changes now converts the
  Intel/Marvell PXA platform along with the rest. The patches went
  through several rebases before the merge window as bugs were found, so
  they remained separate.

  This has to touch a lot of drivers, in particular the touchscreen,
  pcmcia, sound and clk bits, to detach the driver files from the
  platform and board specific header files"

* tag 'arm-multiplatform-5.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (48 commits)
  ARM: pxa/mmp: remove traces of plat-pxa
  ARM: pxa: convert to multiplatform
  ARM: pxa/sa1100: move I/O space to PCI_IOBASE
  ARM: pxa: remove support for MTD_XIP
  ARM: pxa: move mach/*.h to mach-pxa/
  ARM: PXA: fix multi-cpu build of xsc3
  ARM: pxa: move plat-pxa to drivers/soc/
  ARM: mmp: rename pxa_register_device
  ARM: mmp: remove tavorevb board support
  ARM: pxa: remove unused mach/bitfield.h
  ARM: pxa: move clk register definitions to driver
  ARM: pxa: move smemc register access from clk to platform
  cpufreq: pxa3: move clk register access to clk driver
  ARM: pxa: remove get_clk_frequency_khz()
  ARM: pxa: pcmcia: move smemc configuration back to arch
  ASoC: pxa: i2s: use normal MMIO accessors
  ASoC: pxa: ac97: use normal MMIO accessors
  ASoC: pxa: use pdev resource for FIFO regs
  Input: wm97xx - get rid of irq_enable method in wm97xx_mach_ops
  Input: wm97xx - switch to using threaded IRQ
  ...
2022-06-02 15:23:54 -07:00
Arnd Bergmann
3e11194631
Merge branch 'hpe/gxp-soc' into arm/late
Patch series from Nick Hawkins:

"The GXP is the HPE BMC SoC that is used in the majority of HPE current
 generation servers. Traditionally the asic will last multiple
 generations of server before being replaced.

 Info about SoC:

  HPE GXP is the name of the HPE Soc. This SoC is used to implement many
  BMC features at HPE. It supports ARMv7 architecture based on the Cortex
  A9 core. It is capable of using an AXI bus to which a memory controller
  is attached. It has multiple SPI interfaces to connect boot flash and
  BIOS flash. It uses a 10/100/1000 MAC for network connectivity. It has
  multiple i2c engines to drive connectivity with a host infrastructure.
  The initial patches enable the watchdog and timer enabling the host to
  be able to boot."

* hpe/gxp-soc:
  MAINTAINERS: Introduce HPE GXP Architecture
  ARM: dts: Introduce HPE GXP Device tree
  dt-bindings: arm: hpe: add GXP Support
  dt-bindings: timer: hpe,gxp-timer: Add HPE GXP Timer and Watchdog
  clocksource/drivers/timer-gxp: Add HPE GXP Timer
  watchdog: hpe-wdt: Introduce HPE GXP Watchdog
  ARM: configs: multi_v7_defconfig: Add HPE GXP ARCH
  ARM: hpe: Introduce the HPE GXP architecture

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-05-27 15:55:37 +02:00
Linus Torvalds
ecf0aa5317 ARM: ARMv4T/v5 multiplatform support for v5.19, part 1
This series has been 12 years in the making, it mostly finishes the
 work that was started with the founding of Linaro to clean up platform
 support in the kernel.
 
 The largest change here is a cleanup of the omap1 platform, which
 is the final ARM machine type to get converted to the common-clk
 subsystem. All the omap1 specific drivers are now made independent of the
 mach/*.h headers to allow the platform to be part of a generic ARMv4/v5
 multiplatform kernel. The last bit that enables this support is still
 missing here while we wait for some last dependencies to make it into
 the mainline kernel through other subsystems.
 
 The s3c24xx, ixp4xx, iop32x, ep93xx and dove platforms were all almost
 at the point of allowing multiplatform kernels, this work gets completed
 here along with a few additional cleanup.  At the same time, the s3c24xx
 and s3c64xx are now deprecated and expected to get removed in the future.
 
 The PXA and OMAP1 bits are in a separate branch because of dependencies.
 Once both branches are merged, only the three Intel StrongARM platforms
 (RiscPC, Footbridge/NetWinder and StrongARM1100) need separate kernels,
 and there are no plans to include these.
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Merge tag 'arm-multiplatform-5.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARMv4T/v5 multiplatform support from Arnd Bergmann:
 "This series has been 12 years in the making, it mostly finishes the
  work that was started with the founding of Linaro to clean up platform
  support in the kernel.

  The largest change here is a cleanup of the omap1 platform, which is
  the final ARM machine type to get converted to the common-clk
  subsystem. All the omap1 specific drivers are now made independent of
  the mach/*.h headers to allow the platform to be part of a generic
  ARMv4/v5 multiplatform kernel.

  The last bit that enables this support is still missing here while we
  wait for some last dependencies to make it into the mainline kernel
  through other subsystems.

  The s3c24xx, ixp4xx, iop32x, ep93xx and dove platforms were all almost
  at the point of allowing multiplatform kernels, this work gets
  completed here along with a few additional cleanup. At the same time,
  the s3c24xx and s3c64xx are now deprecated and expected to get removed
  in the future.

  The PXA and OMAP1 bits are in a separate branch because of
  dependencies. Once both branches are merged, only the three Intel
  StrongARM platforms (RiscPC, Footbridge/NetWinder and StrongARM1100)
  need separate kernels, and there are no plans to include these"

* tag 'arm-multiplatform-5.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (61 commits)
  ARM: ixp4xx: Consolidate Kconfig fixing issue
  ARM: versatile: Add missing of_node_put in dcscb_init
  ARM: config: Refresh IXP4xx config after multiplatform
  ARM: omap1: add back omap_set_dma_priority() stub
  ARM: omap: fix missing declaration warnings
  ARM: omap: fix address space warnings from sparse
  ARM: spear: remove include/mach/ subdirectory
  ARM: davinci: remove include/mach/ subdirectory
  ARM: omap2: remove include/mach/ subdirectory
  integrator: remove empty ap_init_early()
  ARM: s3c: fix include path
  MAINTAINERS: omap1: Add Janusz as an additional maintainer
  ARM: omap1: htc_herald: fix typos in comments
  ARM: OMAP1: fix typos in comments
  ARM: OMAP1: clock: Remove noop code
  ARM: OMAP1: clock: Remove unused code
  ARM: OMAP1: clock: Fix UART rate reporting algorithm
  ARM: OMAP1: clock: Fix early UART rate issues
  ARM: OMAP1: Prepare for conversion of OMAP1 clocks to CCF
  ARM: omap1: fix build with no SoC selected
  ...
2022-05-26 10:43:09 -07:00
Nick Hawkins
8294fec1ca ARM: 9206/1: A9: Add ARM ERRATA 764319 workaround (Updated)
Enable the workaround for the 764319 Cortex A-9 erratum.
CP14 read accesses to the DBGPRSR and DBGOSLSR registers generate an
unexpected Undefined Instruction exception when the DBGSWENABLE external
pin is set to 0, even when the CP14 accesses are performed from a
privileged mode. The work around catches the exception in a way
the kernel does not stop execution with the use of undef_hook. This
has been found to effect the HPE GXP SoC.

Signed-off-by: Nick Hawkins <nick.hawkins@hpe.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2022-05-20 12:33:48 +01:00
Nick Hawkins
11d894405d ARM: hpe: Introduce the HPE GXP architecture
The GXP is the HPE BMC SoC that is used in the majority
of current generation HPE servers. Traditionally the asic will
last multiple generations of server before being replaced.

Info about SoC:

HPE GXP is the name of the HPE Soc. This SoC is used to implement many BMC
features at HPE. It supports ARMv7 architecture based on the Cortex A9
core. It is capable of using an AXI bus to whicha memory controller is
attached. It has multiple SPI interfaces to connect boot flash and BIOS
flash. It uses a 10/100/1000 MAC for network connectivity. It has multiple
i2c engines to drive connectivity with a host infrastructure. There
currently are no public specifications but this process is being worked.

Previously there was a requirement to reset the EHCI controller for the
asic to boot. This functionality has been moved to the u-boot
bootloader.

Signed-off-by: Nick Hawkins <nick.hawkins@hpe.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-05-18 14:05:53 +02:00
Arnd Bergmann
250c1a694f ARM: pxa: convert to multiplatform
PXA is now ready to be built into a single kernel with all the
other ARMv5 platforms, so change the Kconfig bit to finish it
off. The mach/uncompress.h support is the last bit that goes away,
getting replaced with the normal DEBUG_LL based approach.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-05-07 22:56:17 +02:00
Arnd Bergmann
5414bea9a4 ARM: pxa: remove support for MTD_XIP
Using MTD-XIP does not work on multiplatform kernels because
it requires SoC specific register accesses to be done from
low-level flash handling functions in RAM while the rest of the
kernel sits in flash.

I found no evidence of anyone still actually using this feature,
so remove it from PXA to avoid spending a lot of time on
actually making it work.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-05-07 22:56:17 +02:00
Arnd Bergmann
64dbc4dd7a ARM: pxa: move plat-pxa to drivers/soc/
There are two drivers in arch/arm/plat-pxa: mfp and ssp. Both
of them should ideally not be needed at all, as there are
proper subsystems to replace them.

OTOH, they are self-contained and can simply be normal
SoC drivers, so move them over there to eliminate one more
of the plat-* directories.

Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> (mach-pxa)
Acked-by: Lubomir Rintel <lkundrak@v3.sk> (mach-mmp)
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-05-07 22:56:16 +02:00
Arnd Bergmann
0cd47616cf Merge branch 'omap1/multiplatform-prep' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc into arm/multiplatform
This is the full series for converting OMAP1 to multiplatform, rebased
from my 2019 attempt to do the same thing. The soc tree contains simpler
patches to do the same for iop32x, ixp4xx, ep93xx and s3c24xx, which
means we are getting closer to completing this for all ARMv5 platforms
(I have patches for PXA, which is the last one remaining).

Janusz already tested the branch separately and did the missing work
for the common-clk conversion after my previous approach was broken.

Aaro found one regression during additional testing, this is fixed now.

Acked-by: Tony Lindgren <tony@atomide.com>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-22 11:14:55 +02:00
Arnd Bergmann
615dce5bf7 ARM: omap1: fix build with no SoC selected
In a multiplatform randconfig kernel, one can have
CONFIG_ARCH_OMAP1 enabled, but none of the specific SoCs.
This leads to some build issues as the code is not
meant to deal with this configuration at the moment:

arch/arm/mach-omap1/io.c:86:20: error: unused function 'omap1_map_common_io' [-Werror,-Wunused-function]
arch/arm/mach-omap1/pm.h:113:2: error: "Power management for this processor not implemented yet" [-Werror,-W#warnings]

Use the same trick as on OMAP2 and guard the actual compilation
of platform code with another Makefile ifdef check based
on an option that depends on having at least one SoC enabled.

The io.c file still needs to get compiled to allow building
device drivers with a dependency on CONFIG_ARCH_OMAP1.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-22 11:08:55 +02:00
Arnd Bergmann
7e0a9e622d ARM: omap1: move mach/*.h into mach directory
Most of the header files are no longer referenced from outside
arch/arm/mach-omap1, so move them all to that place directly
and change their users to use the new location.

The exceptions are:

- mach/compress.h is used by the core architecture code
- mach/serial.h is used by mach/compress.h

The mach/memory.h is empty and gets removed in the process,
avoiding the need for CONFIG_NEED_MACH_MEMORY_H.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-22 11:08:55 +02:00
Arnd Bergmann
df99e7bbbe ARM: omap1: use pci_remap_iospace() for omap_cf
The ISA I/O space handling in omap_cf is incompatible with
PCI drivers in a multiplatform kernel, and requires a custom
mach/io.h.

Change the driver to use pci_remap_iospace() like PCI drivers do,
so the generic ioport access can work across platforms.

To actually use that code, we have to select CONFIG_PCI
here.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-22 11:08:55 +02:00
Arnd Bergmann
04e8d9d139 ARM: omap: split up arch/arm/plat-omap/Kconfig
All the remaining features in here are either omap1
or omap2plus specific, so move them into the respective
Kconfig files.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-22 11:08:55 +02:00
Arnd Bergmann
3d427228f7 ARM: ixp4xx: enable multiplatform support
After all the work that Linus Walleij did on this platform, it can be
part of a generic kernel build as well.

Note that there are known bugs in little-endian mode on ixp4xx, and
no other ARMv5 platform at this point supports big-endian mode, or is
likely to in the future, so there is limited practical value in this,
but it helps with build testing and ixp4xx little-endian support may
get fixed in the future.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-08 17:20:55 +02:00
Arnd Bergmann
5d6f52671e ARM: rework endianess selection
Choosing big-endian vs little-endian kernels in Kconfig has not worked
correctly since the introduction of CONFIG_ARCH_MULTIPLATFORM a long
time ago.

The problems is that CONFIG_BIG_ENDIAN depends on
ARCH_SUPPORTS_BIG_ENDIAN, which can set by any one platform
in the config, but would actually have to be supported by all
of them.

This was mostly ok for ARMv6/ARMv7 builds, since these are BE8 and
tend to just work aside from problems in nonportable device drivers.
For ARMv4/v5 machines, CONFIG_BIG_ENDIAN and CONFIG_ARCH_MULTIPLATFORM
were never set together, so this was disabled on all those machines
except for IXP4xx.

As IXP4xx can now become part of ARCH_MULTIPLATFORM, it seems better to
formalize this logic: all ARMv4/v5 platforms get an explicit dependency
on being either big-endian (ixp4xx) or little-endian (the rest). We may
want to fix ixp4xx in the future to support both, but it does not work
in LE mode at the moment.

For the ARMv6/v7 platforms, there are two ways this could be handled

 a) allow both modes only for platforms selecting
    'ARCH_SUPPORTS_BIG_ENDIAN' today, but only LE mode for the
    others, given that these were added intentionally at some
    point.

 b) allow both modes everwhere, given that it was already possible
    to build that way by e.g. selecting ARCH_VIRT, and that the
    list is not an accurate reflection of which platforms may or
    may not work.

Out of these, I picked b) because it seemed slighly more logical
to me.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-08 17:20:54 +02:00
Arnd Bergmann
a3102fafdc ARM: iop32x: enable multiplatform support
After iop32x was converted to the generic multi-irq entry
code, nothing really stops us from building it into a
generic kernel.

The two last headers can simply be removed, the mach/irqs.h
gets replaced with the sparse-irq intiialization from the
board specific .nr_irqs value, and the decompressor debug
output can use the debug_ll hack that all other platforms
use.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-08 17:20:49 +02:00
Arnd Bergmann
8c1fb11b8a ARM: s3c: enable s3c24xx multiplatform support
With the custom ISA I/O and the missing sparse-irq support
out of the way, s3c24xx can now be built into the same
kernel as all other ARM9 based platforms.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-08 17:19:18 +02:00
Arnd Bergmann
c78a41fc04 ARM: s3c24xx: convert to sparse-irq
As a final bit of preparation for converting to ARCH_MULTIPLATFORM,
change the interrupt handling for s3c24xx to use sparse IRQs.

Since the number of possible interrupts is already fixed and relatively
small per chip, just make it use all legacy interrupts preallocated
using the .nr_irqs field in the machine descriptor, rather than actually
allocating domains on the fly.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-07 09:31:31 +02:00
Arnd Bergmann
91276c0fa4 ARM: s3c24xx: remove support for ISA drivers on BAST PC/104
BAST is the one machine that theoretically supports unmodified ISA
drivers for hardware on its PC/104 connector, using a custom version of
the inb()/outb() and inw()/outw() macros.

This is incompatible with the generic version used in asm/io.h, and
can't easily be used in a multiplatform kernel.

Removing the special case for 16-bit I/O port access on BAST gets us
closer to multiplatform, at the expense of any PC/104 users with 16-bit
cards having to either use an older kernel or modify their ISA drivers
to manually ioremap() the area and use readw()/write() in place of
inw()/outw(). Either way is probably ok, given that there is a
recurring discussion about dropping s3c24xx altogether, and many
traditional ISA drivers are already gone.

Machines other than BAST already have no support for ISA drivers, though a
couple of them do map one of the external chip-selects into the ISA port
range, using the same address for 8-bit and 16-bit I/O. It is unlikely
that anything actually uses this mapping, but it's also easy to keep
this working by mapping it to the normal platform-independent PCI I/O
base that is otherwise unused on s3c24xx.

The mach/map-base.h file is no longer referenced in global headers and
can be moved into the platform directory.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-07 09:31:21 +02:00
Arnd Bergmann
09f6b27d5d ARM: dove: multiplatform support
The dove platform is now ready to be enabled for multiplatform
support, this patch does the switch over by modifying the Kconfig file,
the defconfig and removing the last mach/*.h header that becomes obsolete
with this.

This work was originally done in 2015 as all the ARMv7 machiens
gove moved over to multiplatform builds, but at the time it conflicted
with some patches that Russell was trying to upstream, so we
left it at that.

I hope that there is no longer a need to keep dove separate from the
rest, so we can either add it to the other ARMv7 platforms, or just
replace it with the DT based platform code for the same hardware
in mach-mvebu and remove mach-dove entirely.

Acked-by: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Gregory Clement <gregory.clement@bootlin.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-04 10:22:37 +02:00
Arnd Bergmann
0361c7e504 ARM: ep93xx: multiplatform support
With the clock support and the interrupts out of the way, ep93xx can be
compiled into the same kernel image as the other ARMv4/v5 platforms. The
last obstacle are the two workarounds for broken boot loaders that
require us to re-initialize the ethernet controller and/or the watchdog
on certain machines.

Move this code into the decompressor sources directly, checking for
each possibly affected machine individually.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-04 10:22:37 +02:00
Arnd Bergmann
36f1a4ae6b ARM: ep93xx: enable SPARSE_IRQ
Without CONFIG_SPARSE_IRQ, we rely on mach/irqs.h to define NR_IRQS
globally. Do the minimal conversion by setting .nr_irqs in each
machine descriptor.

Only the vision_ep9307 machine has extra IRQs for GPIOs, so make
.nr_irqs the original value there, while using the plain NR_EP93XX_IRQS
everywhere else.

Cc: Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Hubert Feurstein <hubert.feurstein@contec.at>
Cc: Lukasz Majewski <lukma@denx.de>
Tested-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-04 10:22:37 +02:00
Arnd Bergmann
d7445676e8 ARM: versatile: move integrator/realview/vexpress to versatile
These are all fairly small platforms by now, and they are
closely related. Just move them all into a single directory.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-04-04 10:22:37 +02:00
Linus Torvalds
9ae2a14308 dma-mapping updates for Linux 5.18
- do not zero buffer in set_memory_decrypted (Kirill A. Shutemov)
  - fix return value of dma-debug __setup handlers (Randy Dunlap)
  - swiotlb cleanups (Robin Murphy)
  - remove most remaining users of the pci-dma-compat.h API
    (Christophe JAILLET)
  - share the ABI header for the DMA map_benchmark with userspace
    (Tian Tao)
  - update the maintainer for DMA MAPPING BENCHMARK (Xiang Chen)
  - remove CONFIG_DMA_REMAP (me)
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Merge tag 'dma-mapping-5.18' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping updates from Christoph Hellwig:

 - do not zero buffer in set_memory_decrypted (Kirill A. Shutemov)

 - fix return value of dma-debug __setup handlers (Randy Dunlap)

 - swiotlb cleanups (Robin Murphy)

 - remove most remaining users of the pci-dma-compat.h API
   (Christophe JAILLET)

 - share the ABI header for the DMA map_benchmark with userspace
   (Tian Tao)

 - update the maintainer for DMA MAPPING BENCHMARK (Xiang Chen)

 - remove CONFIG_DMA_REMAP (me)

* tag 'dma-mapping-5.18' of git://git.infradead.org/users/hch/dma-mapping:
  dma-mapping: benchmark: extract a common header file for map_benchmark definition
  dma-debug: fix return value of __setup handlers
  dma-mapping: remove CONFIG_DMA_REMAP
  media: v4l2-pci-skeleton: Remove usage of the deprecated "pci-dma-compat.h" API
  rapidio/tsi721: Remove usage of the deprecated "pci-dma-compat.h" API
  sparc: Remove usage of the deprecated "pci-dma-compat.h" API
  agp/intel: Remove usage of the deprecated "pci-dma-compat.h" API
  alpha: Remove usage of the deprecated "pci-dma-compat.h" API
  MAINTAINERS: update maintainer list of DMA MAPPING BENCHMARK
  swiotlb: simplify array allocation
  swiotlb: tidy up includes
  swiotlb: simplify debugfs setup
  swiotlb: do not zero buffer in set_memory_decrypted()
2022-03-29 08:50:14 -07:00
Linus Torvalds
ed4643521e ARM: DT updates for 5.18
After a somewhat quiet 5.17 release, the size of the DT changes
 is a bit larger again. There are nine new SoC that get added,
 all of them related to existing platforms:
 
  - Airoha (formerly Mediatek/EcoNet) EN7523 networking SoC and EVB
 
  - Mediatek mt6582 tablet platform with the Prestigio PMT5008 3G tablet
 
  - Microchip Lan966 networking SoC and it evaluation board
 
  - Qualcomm Snapdragon 625/632 midrange phone SoCs, with the
    LG Nexus 5X and Fairphone FP3 phones
 
  - Renesas RZ/G2LC and RZ/V2L general-purpose embedded SoCs,
    along with their evaluation boards
 
  - Samsung Exynos 850 phone SoC and reference board
 
  - Samsung Exynos7885 with the Samsung Galaxy A8 (2018) phone
 
  - Tesla FSD (Fully Self-Driving), an automotive SoC losely derived
    from the Samsung Exynos family.
 
  - TI K3/AM62 SoC and reference board
 
 Support for additional functionality in existing dts files is added all
 over the place: Samsung, Renesas, Mstar, wpcm450, OMAP, AT91, Allwinner,
 i.MX, Tegra, Aspeed, Oxnas, Qualcomm, Mediatek, and Broadcom.
 
 Samsung has a rework for its pinctrl schema that is a bit tricky and
 requires driver changes to be included here.
 
 A few more platforms only have smaller cleanups and DT Schema fixes,
 this includes SoCFPGA, ux500, ixp4xx, STi, Xilinx Zynq, LG, and Juno.
 
 The new machines are really too many to list, but I'll do it anyway:
 
  Allwinner:
    - A20-Marsboard development board
 
  Amlogic
   - Amediatek X96-AIR (Amlogic S905X3)
   - CYX A95XF3-AIR (Amlogic S905X3)
   - Haochuangy H96-Max (Amlogic S905X3)
   - Amlogic AQ222 (Amlogic S4)
   - OSMC Vero 4K+ (Amlogic S905D)
 
  Arm Juno
   - Separate DT depending on SCMI firmware version
 
  Aspeed:
   - Quanta S6Q BMC (AST2600)
   - ASRock ROMED8HM3 (AST2500)
 
  Broadcom:
   - Raspberry Pi Zero 2 W
 
  Marvell MVEBU/Armada:
   - Ctera C200 V1 NAS (kirkwood)
   - Ctera C200 V2 NAS (armada-370)
 
  Mstar
   - DongShanPiOne, a low-end embedded board
   - Miyoo Mini handheld game console
 
  NXP i.MX:
   - Numerous i.MX8M Mini based boards in even more variations, but
     none based on other SoCs this time:
     Protonic PRT8MM, emCON-MX8M Mini, Toradex Verdin, and
     Gateworks GW7903
 
  Qualcomm:
   - Google Herobrine R1 Chromebook platform (Snapdragon 7c Gen 3)
   - SHIFT6mq phone (Snapdragon 845)
   - Samsung Galaxy Book2 (Snapdragon 850)
   - Snapdragon 8 Gen 1 Hardware Development Kit
 
  TI OMAP:
   - SanCloud BeagleBone Enhanced WiFi
 
  Rockchip:
   - Pine64 PineNote ereader tablet (rk356x)
   - Bananapi-R2-Pro (rk356x)
 
  STM32:
   - emtrion emSBS-Argon embedded board (stm32mp157c)
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Merge tag 'arm-dt-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM devicetree updates from Arnd Bergmann:
 "After a somewhat quiet 5.17 release, the size of the DT changes is a
  bit larger again. There are nine new SoC that get added, all of them
  related to existing platforms:

   - Airoha (formerly Mediatek/EcoNet) EN7523 networking SoC and EVB

   - Mediatek mt6582 tablet platform with the Prestigio PMT5008 3G
     tablet

   - Microchip Lan966 networking SoC and it evaluation board

   - Qualcomm Snapdragon 625/632 midrange phone SoCs, with the LG Nexus
     5X and Fairphone FP3 phones

   - Renesas RZ/G2LC and RZ/V2L general-purpose embedded SoCs, along
     with their evaluation boards

   - Samsung Exynos 850 phone SoC and reference board

   - Samsung Exynos7885 with the Samsung Galaxy A8 (2018) phone

   - Tesla FSD (Fully Self-Driving), an automotive SoC loosely derived
     from the Samsung Exynos family.

   - TI K3/AM62 SoC and reference board

  Support for additional functionality in existing dts files is added
  all over the place: Samsung, Renesas, Mstar, wpcm450, OMAP, AT91,
  Allwinner, i.MX, Tegra, Aspeed, Oxnas, Qualcomm, Mediatek, and
  Broadcom.

  Samsung has a rework for its pinctrl schema that is a bit tricky and
  requires driver changes to be included here.

  A few more platforms only have smaller cleanups and DT Schema fixes,
  this includes SoCFPGA, ux500, ixp4xx, STi, Xilinx Zynq, LG, and Juno.

  The new machines are really too many to list, but I'll do it anyway:

  Allwinner:
   - A20-Marsboard development board

  Amlogic:
   - Amediatek X96-AIR (Amlogic S905X3)
   - CYX A95XF3-AIR (Amlogic S905X3)
   - Haochuangy H96-Max (Amlogic S905X3)
   - Amlogic AQ222 (Amlogic S4)
   - OSMC Vero 4K+ (Amlogic S905D)

  Arm Juno:
   - Separate DT depending on SCMI firmware version

  Aspeed:
   - Quanta S6Q BMC (AST2600)
   - ASRock ROMED8HM3 (AST2500)

  Broadcom:
   - Raspberry Pi Zero 2 W

  Marvell MVEBU/Armada:
   - Ctera C200 V1 NAS (kirkwood)
   - Ctera C200 V2 NAS (armada-370)

  Mstar:
   - DongShanPiOne, a low-end embedded board
   - Miyoo Mini handheld game console

  NXP i.MX:
   - Numerous i.MX8M Mini based boards in even more variations, but
    none based on other SoCs this time:
    Protonic PRT8MM, emCON-MX8M Mini, Toradex Verdin, and
    Gateworks GW7903

  Qualcomm:
   - Google Herobrine R1 Chromebook platform (Snapdragon 7c Gen 3)
   - SHIFT6mq phone (Snapdragon 845)
   - Samsung Galaxy Book2 (Snapdragon 850)
   - Snapdragon 8 Gen 1 Hardware Development Kit

  TI OMAP:
   - SanCloud BeagleBone Enhanced WiFi

  Rockchip:
   - Pine64 PineNote ereader tablet (rk356x)
   - Bananapi-R2-Pro (rk356x)

  STM32:
   - emtrion emSBS-Argon embedded board (stm32mp157c)"

* tag 'arm-dt-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (627 commits)
  arm64: dts: n5x: drop invalid property and fix edac node name
  arm64: dts: fsd: Add the MCT support
  arm64: dts: stingray: Fix spi clock name
  arm64: dts: ns2: Fix spi clock name
  ARM: dts: rockchip: Update regulator name for PX3
  ARM: dts: rockchip: Add #clock-cells value for rk805
  arm64: dts: rockchip: Add #clock-cells value for rk805
  arm64: dts: rockchip: Remove vcc13 and vcc14 for rk808
  arm64: dts: rockchip: Fix SDIO regulator supply properties on rk3399-firefly
  ARM: dts: at91: sama7g5: Add NAND support
  ARM: dts: at91: sama7g5: add eic node
  ARM: dts: at91: sama7g5: Remove unused properties in i2c nodes
  ARM: dts: at91: sam9x60ek: modify vdd_1v5 regulator to vdd_1v15
  arm64: dts: lg: align pl330 node name with dtschema
  arm64: dts: lg: add dma-cells to pl330 node
  arm64: dts: juno: align pl330 node name with dtschema
  arm64: dts: broadcom: Fix sata nodename
  arm64: dts: n5x: add sdr edac support
  arm64: dts: agilex/stratix10: add clock-names to USB DWC2 node
  dt-bindings: usb: dwc2: add disable-over-current
  ...
2022-03-23 18:37:22 -07:00
Linus Torvalds
baaa68a979 ARM: SoC updates for 5.18
SoC specific code is generally used for older platforms that don't (yet)
 use device tree to do the same things.
 
  - Support is added for i.MXRT10xx, a Cortex-M7 based microcontroller
    from NXP. At the moment this is still incomplete as other portions
    are merged through different trees.
 
  - Long abandoned support for running NOMMU ARMv4 or ARMv5 platforms
    gets removed, now the Arm NOMMU platforms are limited to the
    Cortex-M family of microcontrollers
 
  - Two old PXA boards get removed, along with corresponding driver
    bits.
 
  - Continued cleanup of the Intel IXP4xx platforms, removing some
    remnants of the old board files.
 
  - Minor Cleanups and fixes for Orion, PXA, MMP, Mstar, Samsung
 
  - CPU idle support for AT91
 
  - A system controller driver for Polarfire
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Merge tag 'arm-soc-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC updates from Arnd Bergmann:
 "SoC specific code is generally used for older platforms that don't
  (yet) use device tree to do the same things.

   - Support is added for i.MXRT10xx, a Cortex-M7 based microcontroller
     from NXP. At the moment this is still incomplete as other portions
     are merged through different trees.

   - Long abandoned support for running NOMMU ARMv4 or ARMv5 platforms
     gets removed, now the Arm NOMMU platforms are limited to the
     Cortex-M family of microcontrollers

   - Two old PXA boards get removed, along with corresponding driver
     bits.

   - Continued cleanup of the Intel IXP4xx platforms, removing some
     remnants of the old board files.

   - Minor Cleanups and fixes for Orion, PXA, MMP, Mstar, Samsung

   - CPU idle support for AT91

   - A system controller driver for Polarfire"

* tag 'arm-soc-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (29 commits)
  ARM: remove support for NOMMU ARMv4/v5
  ARM: PXA: fix up decompressor code
  soc: microchip: make mpfs_sys_controller_put static
  ARM: pxa: remove Intel Imote2 and Stargate 2 boards
  ARM: mmp: Fix failure to remove sram device
  ARM: mstar: Select ARM_ERRATA_814220
  soc: add microchip polarfire soc system controller
  ARM: at91: Kconfig: select PM_OPP
  ARM: at91: PM: add cpu idle support for sama7g5
  ARM: at91: ddr: fix typo to align with datasheet naming
  ARM: at91: ddr: align macro definitions
  ARM: at91: ddr: remove CONFIG_SOC_SAMA7 dependency
  ARM: ixp4xx: Convert to SPARSE_IRQ and P2V
  ARM: ixp4xx: Drop all common code
  ARM: ixp4xx: Drop custom DMA coherency and bouncing
  ARM: ixp4xx: Remove feature bit accessors
  net: ixp4xx_hss: Check features using syscon
  net: ixp4xx_eth: Drop platform data support
  soc: ixp4xx-npe: Access syscon regs using regmap
  soc: ixp4xx: Add features from regmap helper
  ...
2022-03-23 18:20:09 -07:00
Linus Torvalds
9c0e6a89b5 ARM development updates for 5.18:
Updates for IRQ stacks and virtually mapped stack support for ARM from
 the following pull requests, etc:
 
 1) ARM: support for IRQ and vmap'ed stacks
 
 This PR covers all the work related to implementing IRQ stacks and
 vmap'ed stacks for all 32-bit ARM systems that are currently supported
 by the Linux kernel, including RiscPC and Footbridge. It has been
 submitted for review in three different waves:
 - IRQ stacks support for v7 SMP systems [0],
 - vmap'ed stacks support for v7 SMP systems[1],
 - extending support for both IRQ stacks and vmap'ed stacks for all
   remaining configurations, including v6/v7 SMP multiplatform kernels
   and uniprocessor configurations including v7-M [2]
 
 [0] https://lore.kernel.org/linux-arm-kernel/20211115084732.3704393-1-ardb@kernel.org/
 [1] https://lore.kernel.org/linux-arm-kernel/20211122092816.2865873-1-ardb@kernel.org/
 [2] https://lore.kernel.org/linux-arm-kernel/20211206164659.1495084-1-ardb@kernel.org/
 
 2) ARM: support for IRQ and vmap'ed stacks [v6]
 
 This tag covers the changes between the version of vmap'ed + IRQ stacks
 support pulled into rmk/devel-stable [0] (which was dropped from v5.17
 due to issues discovered too late in the cycle), and my v5 proposed for
 the v5.18 cycle [1].
 
 [0] git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git arm-irq-and-vmap-stacks-for-rmk
 [1] https://lore.kernel.org/linux-arm-kernel/20220124174744.1054712-1-ardb@kernel.org/
 
 3) ARM: ftrace fixes and cleanups
 
 Make all flavors of ftrace available on all builds, regardless of ISA
 choice, unwinder choice or compiler:
 - use ADD not POP where possible
 - fix a couple of Thumb2 related issues
 - enable HAVE_FUNCTION_GRAPH_FP_TEST for robustness
 - enable the graph tracer with the EABI unwinder
 - avoid clobbering frame pointer registers to make Clang happy
 
 Link: https://lore.kernel.org/linux-arm-kernel/20220203082204.1176734-1-ardb@kernel.org/
 
 4) Fixes for the above.
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM updates from Russell King:
 "Updates for IRQ stacks and virtually mapped stack support, and ftrace:

   - Support for IRQ and vmap'ed stacks

     This covers all the work related to implementing IRQ stacks and
     vmap'ed stacks for all 32-bit ARM systems that are currently
     supported by the Linux kernel, including RiscPC and Footbridge. It
     has been submitted for review in four different waves:

      - IRQ stacks support for v7 SMP systems [0]

      - vmap'ed stacks support for v7 SMP systems[1]

      - extending support for both IRQ stacks and vmap'ed stacks for all
        remaining configurations, including v6/v7 SMP multiplatform
        kernels and uniprocessor configurations including v7-M [2]

      - fixes and updates in [3]

   - ftrace fixes and cleanups

     Make all flavors of ftrace available on all builds, regardless of
     ISA choice, unwinder choice or compiler [4]:

      - use ADD not POP where possible

      - fix a couple of Thumb2 related issues

      - enable HAVE_FUNCTION_GRAPH_FP_TEST for robustness

      - enable the graph tracer with the EABI unwinder

      - avoid clobbering frame pointer registers to make Clang happy

   - Fixes for the above"

[0] https://lore.kernel.org/linux-arm-kernel/20211115084732.3704393-1-ardb@kernel.org/
[1] https://lore.kernel.org/linux-arm-kernel/20211122092816.2865873-1-ardb@kernel.org/
[2] https://lore.kernel.org/linux-arm-kernel/20211206164659.1495084-1-ardb@kernel.org/
[3] https://lore.kernel.org/linux-arm-kernel/20220124174744.1054712-1-ardb@kernel.org/
[4] https://lore.kernel.org/linux-arm-kernel/20220203082204.1176734-1-ardb@kernel.org/

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (62 commits)
  ARM: fix building NOMMU ARMv4/v5 kernels
  ARM: unwind: only permit stack switch when unwinding call_with_stack()
  ARM: Revert "unwind: dump exception stack from calling frame"
  ARM: entry: fix unwinder problems caused by IRQ stacks
  ARM: unwind: set frame.pc correctly for current-thread unwinding
  ARM: 9184/1: return_address: disable again for CONFIG_ARM_UNWIND=y
  ARM: 9183/1: unwind: avoid spurious warnings on bogus code addresses
  Revert "ARM: 9144/1: forbid ftrace with clang and thumb2_kernel"
  ARM: mach-bcm: disable ftrace in SMC invocation routines
  ARM: cacheflush: avoid clobbering the frame pointer
  ARM: kprobes: treat R7 as the frame pointer register in Thumb2 builds
  ARM: ftrace: enable the graph tracer with the EABI unwinder
  ARM: unwind: track location of LR value in stack frame
  ARM: ftrace: enable HAVE_FUNCTION_GRAPH_FP_TEST
  ARM: ftrace: avoid unnecessary literal loads
  ARM: ftrace: avoid redundant loads or clobbering IP
  ARM: ftrace: use trampolines to keep .init.text in branching range
  ARM: ftrace: use ADD not POP to counter PUSH at entry
  ARM: ftrace: ensure that ADR takes the Thumb bit into account
  ARM: make get_current() and __my_cpu_offset() __always_inline
  ...
2022-03-23 17:35:57 -07:00
Linus Torvalds
3bf03b9a08 Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton:

 - A few misc subsystems: kthread, scripts, ntfs, ocfs2, block, and vfs

 - Most the MM patches which precede the patches in Willy's tree: kasan,
   pagecache, gup, swap, shmem, memcg, selftests, pagemap, mremap,
   sparsemem, vmalloc, pagealloc, memory-failure, mlock, hugetlb,
   userfaultfd, vmscan, compaction, mempolicy, oom-kill, migration, thp,
   cma, autonuma, psi, ksm, page-poison, madvise, memory-hotplug, rmap,
   zswap, uaccess, ioremap, highmem, cleanups, kfence, hmm, and damon.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (227 commits)
  mm/damon/sysfs: remove repeat container_of() in damon_sysfs_kdamond_release()
  Docs/ABI/testing: add DAMON sysfs interface ABI document
  Docs/admin-guide/mm/damon/usage: document DAMON sysfs interface
  selftests/damon: add a test for DAMON sysfs interface
  mm/damon/sysfs: support DAMOS stats
  mm/damon/sysfs: support DAMOS watermarks
  mm/damon/sysfs: support schemes prioritization
  mm/damon/sysfs: support DAMOS quotas
  mm/damon/sysfs: support DAMON-based Operation Schemes
  mm/damon/sysfs: support the physical address space monitoring
  mm/damon/sysfs: link DAMON for virtual address spaces monitoring
  mm/damon: implement a minimal stub for sysfs-based DAMON interface
  mm/damon/core: add number of each enum type values
  mm/damon/core: allow non-exclusive DAMON start/stop
  Docs/damon: update outdated term 'regions update interval'
  Docs/vm/damon/design: update DAMON-Idle Page Tracking interference handling
  Docs/vm/damon: call low level monitoring primitives the operations
  mm/damon: remove unnecessary CONFIG_DAMON option
  mm/damon/paddr,vaddr: remove damon_{p,v}a_{target_valid,set_operations}()
  mm/damon/dbgfs-test: fix is_target_id() change
  ...
2022-03-22 16:11:53 -07:00
Anshuman Khandual
07431506e8 mm/hugetlb: generalize ARCH_WANT_GENERAL_HUGETLB
ARCH_WANT_GENERAL_HUGETLB config has duplicate definitions on platforms
that subscribe it.  Instead make it a generic config option which can be
selected on applicable platforms when required.

Link: https://lkml.kernel.org/r/1643718465-4324-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-03-22 15:57:08 -07:00
Arnd Bergmann
2f618d5ef5 ARM: remove support for NOMMU ARMv4/v5
It is possible to build MMU-less kernels for Cortex-M base
microcrontrollers as well as a couple of older platforms that
have not been converted to CONFIG_ARCH_MULTIPLATFORM,
specifically ep93xx, footbridge, dove, sa1100 and s3c24xx.

It seems unlikely that anybody has tested those configurations
in recent years, as even building them is frequently broken.
A patch I submitted caused another build time regression
in this configuration. I sent a patch for that, but it seems
better to also remove the option entirely, leaving ARMv7-M
as the only supported Arm NOMMU target for simplicity.

A couple of platforms have dependencies on CONFIG_MMU, those
can all be removed now. Notably, mach-integrator tries to
support MMU-less CPU cores, but those have not actually been
selectable for a long time.

This addresses several build failures in randconfig builds that
have accumulated over the years.

Cc: Vladimir Murzin <vladimir.murzin@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-03-17 09:13:13 +01:00
Arnd Bergmann
234a0f202a ARM: fix building NOMMU ARMv4/v5 kernels
The removal of the old-style irq entry broke obscure NOMMU
configurations on machines that have an MMU:

ld.lld: error: undefined symbol: generic_handle_arch_irq
 referenced by kernel/entry-armv.o:(__irq_svc) in archive arch/arm/built-in.a

A follow-up patch to convert nvic to the generic_handle_arch_irq()
could have fixed this by removing the Kconfig conditional, but did
it differently.

Change the Kconfig logic so ARM machines now unconditionally
enable the feature.

I have also submitted a patch to remove support for the configurations
that broke, but fixing the regression first is a trivial and correct
change.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 54f481a230 ("ARM: remove old-style irq entry")
Fixes: 52d2408717 ("irqchip: nvic: Use GENERIC_IRQ_MULTI_HANDLER")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2022-03-12 09:25:20 +00:00
Christoph Hellwig
f5ff79fddf dma-mapping: remove CONFIG_DMA_REMAP
CONFIG_DMA_REMAP is used to build a few helpers around the core
vmalloc code, and to use them in case there is a highmem page in
dma-direct, and to make dma coherent allocations be able to use
non-contiguous pages allocations for DMA allocations in the dma-iommu
layer.

Right now it needs to be explicitly selected by architectures, and
is only done so by architectures that require remapping to deal
with devices that are not DMA coherent.  Make it unconditional for
builds with CONFIG_MMU as it is very little extra code, but makes
it much more likely that large DMA allocations succeed on x86.

This fixes hot plugging a NVMe thunderbolt SSD for me, which tries
to allocate a 1MB buffer that is otherwise hard to obtain due to
memory fragmentation on a heavily used laptop.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
2022-03-03 14:00:57 +03:00
Arnd Bergmann
8a6ea4edcf - add initial support for mt6582 and Prestigio PMT5008 3G tablet
- add basic support for Airoha EN7523
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Merge tag 'v5.17-next-dts32' of git://git.kernel.org/pub/scm/linux/kernel/git/matthias.bgg/linux into arm/dt

- add initial support for mt6582 and Prestigio PMT5008 3G tablet
- add basic support for Airoha EN7523

* tag 'v5.17-next-dts32' of git://git.kernel.org/pub/scm/linux/kernel/git/matthias.bgg/linux:
  ARM: dts: add GPIO support for Airoha EN7523
  ARM: Add basic support for Airoha EN7523 SoC
  dt-bindings: arm: airoha: Add binding for EN7523 SoC and EVB
  dt-bindings: Add vendor prefix for Airoha
  dt-bindings: mediatek: Adds a DT binding documentation for the MT6582 SoC
  ARM: dts: Add initial support for Prestigio PMT5008 3G tablet
  ARM: dts: Add initial support for Mediatek mt6582

Link: https://lore.kernel.org/r/3974dc7e-4185-4d88-ab5b-031a7d24214d@gmail.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-03-01 15:09:43 +01:00
John Crispin
2cf1c348d0 ARM: Add basic support for Airoha EN7523 SoC
EN7523 is an armv8 based silicon used inside broadband access type devices
such as xPON and xDSL. It shares various silicon blocks with MediaTek
silicon such as the MT7622.

Add basic support for Airoha EN7523, enough for booting to console.

The UART is basically 8250-compatible, except for the clock selection.
A clock-frequency value is synthesized to get this to run at 115200 bps.

Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Bert Vermeulen <bert@biot.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20220130145116.88406-4-nbd@nbd.name
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
2022-03-01 09:02:01 +01:00
Kees Cook
2792d84e6d usercopy: Check valid lifetime via stack depth
One of the things that CONFIG_HARDENED_USERCOPY sanity-checks is whether
an object that is about to be copied to/from userspace is overlapping
the stack at all. If it is, it performs a number of inexpensive
bounds checks. One of the finer-grained checks is whether an object
crosses stack frames within the stack region. Doing this on x86 with
CONFIG_FRAME_POINTER was cheap/easy. Doing it with ORC was deemed too
heavy, and was left out (a while ago), leaving the courser whole-stack
check.

The LKDTM tests USERCOPY_STACK_FRAME_TO and USERCOPY_STACK_FRAME_FROM
try to exercise these cross-frame cases to validate the defense is
working. They have been failing ever since ORC was added (which was
expected). While Muhammad was investigating various LKDTM failures[1],
he asked me for additional details on them, and I realized that when
exact stack frame boundary checking is not available (i.e. everything
except x86 with FRAME_POINTER), it could check if a stack object is at
least "current depth valid", in the sense that any object within the
stack region but not between start-of-stack and current_stack_pointer
should be considered unavailable (i.e. its lifetime is from a call no
longer present on the stack).

Introduce ARCH_HAS_CURRENT_STACK_POINTER to track which architectures
have actually implemented the common global register alias.

Additionally report usercopy bounds checking failures with an offset
from current_stack_pointer, which may assist with diagnosing failures.

The LKDTM USERCOPY_STACK_FRAME_TO and USERCOPY_STACK_FRAME_FROM tests
(once slightly adjusted in a separate patch) pass again with this fixed.

[1] https://github.com/kernelci/kernelci-project/issues/84

Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org
Reported-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
---
v1: https://lore.kernel.org/lkml/20220216201449.2087956-1-keescook@chromium.org
v2: https://lore.kernel.org/lkml/20220224060342.1855457-1-keescook@chromium.org
v3: https://lore.kernel.org/lkml/20220225173345.3358109-1-keescook@chromium.org
v4: - improve commit log (akpm)
2022-02-25 18:20:11 -08:00
Arnd Bergmann
543f7961c2 This cleans out the remaining board files from IXP4xx and
makes it an exclusive device tree subarchitecture without any
 special weirdness in arch/arm/mach-ixp4xx.
 
 The biggest noticeable change is the removal of the old PCI
 driver and along with that the removal of the special DMA
 coherency code and defines and the DMA bouncing.
 
 I tried to convert the IXP4xx to multiplatform on top of
 this but it didn't work because IXP4xx wants to be big
 endian and multiplatform config creates a problem like
 this:
 
 ../arch/arm/kernel/head.S: Assembler messages:
 ../arch/arm/kernel/head.S:94: Error: selected processor does not support `setend be' in ARM mode
 
 I think this is because MULTI_V5 turns on CPUs that cannot
 do big endian, and IXP4xx turn on big endian. (It crashes if
 I try to boot in little endian mode, sorry. It really wants
 to run big endian.)
 
 But before fixing multiplatform we can fix all of this!
 
 The networking patches are dependencies so I am requesting
 ACKs from the network maintainers on these.
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Merge tag 'ixp4xx-cleanup-for-v5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik into arm/soc

This cleans out the remaining board files from IXP4xx and
makes it an exclusive device tree subarchitecture without any
special weirdness in arch/arm/mach-ixp4xx.

The biggest noticeable change is the removal of the old PCI
driver and along with that the removal of the special DMA
coherency code and defines and the DMA bouncing.

I tried to convert the IXP4xx to multiplatform on top of
this but it didn't work because IXP4xx wants to be big
endian and multiplatform config creates a problem like
this:

../arch/arm/kernel/head.S: Assembler messages:
../arch/arm/kernel/head.S:94: Error: selected processor does not support `setend be' in ARM mode

I think this is because MULTI_V5 turns on CPUs that cannot
do big endian, and IXP4xx turn on big endian. (It crashes if
I try to boot in little endian mode, sorry. It really wants
to run big endian.)

But before fixing multiplatform we can fix all of this!

The networking patches are dependencies so I am requesting
ACKs from the network maintainers on these.

* tag 'ixp4xx-cleanup-for-v5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik:
  ARM: ixp4xx: Convert to SPARSE_IRQ and P2V
  ARM: ixp4xx: Drop all common code
  ARM: ixp4xx: Drop custom DMA coherency and bouncing
  ARM: ixp4xx: Remove feature bit accessors
  net: ixp4xx_hss: Check features using syscon
  net: ixp4xx_eth: Drop platform data support
  soc: ixp4xx-npe: Access syscon regs using regmap
  soc: ixp4xx: Add features from regmap helper
  ARM: ixp4xx: Drop UDC info setting function
  ARM: ixp4xx: Drop stale Kconfig entry
  ARM: ixp4xx: Delete old PCI driver
  ARM: ixp4xx: Delete the Goramo MLR boardfile
  ARM: ixp4xx: Delete Gateway 7001 boardfiles

Link: https://lore.kernel.org/r/CACRpkdahK-jaHFqLCpSqiXwAtkSKbhWQZ9jaSo6rRzHfSiECkA@mail.gmail.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-02-25 16:32:03 +01:00
Linus Walleij
06954b6a9e ARM: ixp4xx: Convert to SPARSE_IRQ and P2V
Turn on sparse IRQs and patch-physical-to-virtual for IXP4xx
as this is required for multiplatform. Drop the PHYS_OFFSET as
we are now using P2V.

Tested and works like a charm on my systems.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220211223238.648934-14-linus.walleij@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2022-02-12 18:20:04 +01:00
Linus Walleij
00ba9357d1 ARM: ixp4xx: Drop custom DMA coherency and bouncing
The new PCI driver does not need any of this stuff, so just
drop it.

Cc: iommu@lists.linux-foundation.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220211223238.648934-12-linus.walleij@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2022-02-12 18:20:04 +01:00
Linus Walleij
0ac230e413 ARM: ixp4xx: Delete old PCI driver
We are just using the new PCI driver in the proper PCI host
drivers folder: drivers/pci/controller/pci-ixp4xx.c.

The new driver does not support indirect PCI but it has
turned out noone is using this. If the feature is desired
we have ways to implement it, suggested by John Linville.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220211223238.648934-4-linus.walleij@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2022-02-12 18:20:03 +01:00
Ard Biesheuvel
d6800ca73a Revert "ARM: 9144/1: forbid ftrace with clang and thumb2_kernel"
This reverts commit ecb108e3e3.

Clang + Thumb2 with ftrace is now supported.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-02-10 09:55:05 +01:00
Ard Biesheuvel
41918ec82e ARM: ftrace: enable the graph tracer with the EABI unwinder
Enable the function graph tracer in combination with the EABI unwinder,
so that Thumb2 builds or Clang ARM builds can make use of it.

This involves using the unwinder to locate the return address of an
instrumented function on the stack, so that it can be overridden and
made to refer to the ftrace handling routines that need to be called at
function return.

Given that for these builds, it is not guaranteed that the value of the
link register is stored on the stack, fall back to the stack slot that
will be used by the ftrace exit code to restore LR in the instrumented
function's execution context.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-02-09 09:13:59 +01:00
Steven Rostedt (Google)
4ed308c445 ftrace: Have architectures opt-in for mcount build time sorting
First S390 complained that the sorting of the mcount sections at build
time caused the kernel to crash on their architecture. Now PowerPC is
complaining about it too. And also ARM64 appears to be having issues.

It may be necessary to also update the relocation table for the values
in the mcount table. Not only do we have to sort the table, but also
update the relocations that may be applied to the items in the table.

If the system is not relocatable, then it is fine to sort, but if it is,
some architectures may have issues (although x86 does not as it shifts all
addresses the same).

Add a HAVE_BUILDTIME_MCOUNT_SORT that an architecture can set to say it is
safe to do the sorting at build time.

Also update the config to compile in build time sorting in the sorttable
code in scripts/ to depend on CONFIG_BUILDTIME_MCOUNT_SORT.

Link: https://lore.kernel.org/all/944D10DA-8200-4BA9-8D0A-3BED9AA99F82@linux.ibm.com/
Link: https://lkml.kernel.org/r/20220127153821.3bc1ac6e@gandalf.local.home

Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Yinan Liu <yinan@linux.alibaba.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Reported-by: Sachin Sant <sachinp@linux.ibm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64]
Tested-by: Sachin Sant <sachinp@linux.ibm.com>
Fixes: 72b3942a17 ("scripts: ftrace - move the sort-processing in ftrace_init")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-01-27 19:15:44 -05:00
Ard Biesheuvel
d6905849f8 ARM: assembler: define a Kconfig symbol for group relocation support
Nathan reports the group relocations go out of range in pathological
cases such as allyesconfig kernels, which have little chance of actually
booting but are still used in validation.

So add a Kconfig symbol for this feature, and make it depend on
!COMPILE_TEST.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2022-01-24 21:02:34 +01:00
Ard Biesheuvel
8b806b82bc ARM: mm: switch to swapper_pg_dir early for vmap'ed stack
When onlining a CPU, switch to swapper_pg_dir as soon as possible so
that it is guaranteed that the vmap'ed stack is mapped before it is
used.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2022-01-24 20:37:55 +01:00
Linus Torvalds
daadb3bd0e Peter Zijlstra says:
"Lots of cleanups and preparation; highlights:
 
  - futex: Cleanup and remove runtime futex_cmpxchg detection
 
  - rtmutex: Some fixes for the PREEMPT_RT locking infrastructure
 
  - kcsan: Share owner_on_cpu() between mutex,rtmutex and rwsem and
    annotate the racy owner->on_cpu access *once*.
 
  - atomic64: Dead-Code-Elemination"
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Merge tag 'locking_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking updates from Borislav Petkov:
 "Lots of cleanups and preparation. Highlights:

   - futex: Cleanup and remove runtime futex_cmpxchg detection

   - rtmutex: Some fixes for the PREEMPT_RT locking infrastructure

   - kcsan: Share owner_on_cpu() between mutex,rtmutex and rwsem and
     annotate the racy owner->on_cpu access *once*.

   - atomic64: Dead-Code-Elemination"

[ Description above by Peter Zijlstra ]

* tag 'locking_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/atomic: atomic64: Remove unusable atomic ops
  futex: Fix additional regressions
  locking: Allow to include asm/spinlock_types.h from linux/spinlock_types_raw.h
  x86/mm: Include spinlock_t definition in pgtable.
  locking: Mark racy reads of owner->on_cpu
  locking: Make owner_on_cpu() into <linux/sched.h>
  lockdep/selftests: Adapt ww-tests for PREEMPT_RT
  lockdep/selftests: Skip the softirq related tests on PREEMPT_RT
  lockdep/selftests: Unbalanced migrate_disable() & rcu_read_lock().
  lockdep/selftests: Avoid using local_lock_{acquire|release}().
  lockdep: Remove softirq accounting on PREEMPT_RT.
  locking/rtmutex: Add rt_mutex_lock_nest_lock() and rt_mutex_lock_killable().
  locking/rtmutex: Squash self-deadlock check for ww_rt_mutex.
  locking: Remove rt_rwlock_is_contended().
  sched: Trigger warning if ->migration_disabled counter underflows.
  futex: Fix sparc32/m68k/nds32 build regression
  futex: Remove futex_cmpxchg detection
  futex: Ensure futex_atomic_cmpxchg_inatomic() is present
  kernel/locking: Use a pointer in ww_mutex_trylock().
2022-01-11 17:24:45 -08:00
Linus Torvalds
3e3a138a46 ARM updates for 5.17-rc1:
- amba bus irq rework
 - add kfence support
 - support for Cortex M33 and M55 CPUs
 - kbuild updates for decompressor
 - let core code manage thread_info::cpu
 - avoid unpredictable NOP encoding in decompressor
 - reduce information printed in calltraces
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM updates from Russell King:

 - amba bus irq rework

 - add kfence support

 - support for Cortex M33 and M55 CPUs

 - kbuild updates for decompressor

 - let core code manage thread_info::cpu

 - avoid unpredictable NOP encoding in decompressor

 - reduce information printed in calltraces

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: reduce the information printed in call traces
  ARM: 9168/1: Add support for Cortex-M55 processor
  ARM: 9167/1: Add support for Cortex-M33 processor
  ARM: 9166/1: Support KFENCE for ARM
  ARM: 9165/1: mm: Provide is_write_fault()
  ARM: 9164/1: mm: Provide set_memory_valid()
  ARM: 9163/1: amba: Move of_amba_device_decode_irq() into amba_probe()
  ARM: 9162/1: amba: Kill sysfs attribute file of irq
  ARM: 9161/1: mm: mark private VM_FAULT_X defines as vm_fault_t
  ARM: 9159/1: decompressor: Avoid UNPREDICTABLE NOP encoding
  ARM: 9158/1: leave it to core code to manage thread_info::cpu
  ARM: 9154/1: decompressor: do not copy source files while building
2022-01-11 16:09:36 -08:00
Ard Biesheuvel
23d9a9280e ARM: 9177/1: disable vmap'ed stacks on suspend-capable SMP configs
There are several reports about the new vmap'ed stacks code breaking
suspend/resume on Exynos, Renesas and Tegra SMP platforms. While this is
under investigation, let's disable the vmap'ed stacks feature for the
time being for SMP configurations that have suspend/resume enabled.

[0] https://lore.kernel.org/linux-arm-kernel/20211122092816.2865873-8-ardb@kernel.org/

Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2022-01-05 14:51:13 +00:00
Arnd Bergmann
e91aad4b60 Samsung mach/soc changes for v5.17
1. Minor fixes for S3C platforms.
 2. Remove HAVE_S3C2410_I2C Kconfig symbol - not really useful.
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Merge tag 'samsung-soc-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into arm/soc

Samsung mach/soc changes for v5.17

1. Minor fixes for S3C platforms.
2. Remove HAVE_S3C2410_I2C Kconfig symbol - not really useful.

* tag 'samsung-soc-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
  ARM: samsung: Remove HAVE_S3C2410_I2C and use direct dependencies
  ARM: s3c: add one more "fallthrough" statement in Jive
  ARM: s3c: include header for prototype of s3c2410_modify_misccr

Link: https://lore.kernel.org/r/20211220115530.30961-3-krzysztof.kozlowski@canonical.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-12-20 16:31:40 +01:00
Wang Kefeng
75969686ec ARM: 9166/1: Support KFENCE for ARM
Add architecture specific implementation details for KFENCE and enable
KFENCE on ARM. In particular, this implements the required interface in
 <asm/kfence.h>.

KFENCE requires that attributes for pages from its memory pool can
individually be set. Therefore, force the kfence pool to be mapped
at page granularity.

Testing this patch using the testcases in kfence_test.c and all passed
with or without ARM_LPAE.

Acked-by: Marco Elver <elver@google.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2021-12-17 11:34:38 +00:00
Ingo Molnar
6773cc31a9 Linux 5.16-rc5
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Merge tag 'v5.16-rc5' into locking/core, to pick up fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2021-12-13 10:48:46 +01:00
Ard Biesheuvel
cafc0eab16 ARM: v7m: enable support for IRQ stacks
Enable support for IRQ stacks on !MMU, and add the code to the IRQ entry
path to switch to the IRQ stack if not running from it already.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
2021-12-06 12:49:17 +01:00
Ard Biesheuvel
9c46929e79 ARM: implement THREAD_INFO_IN_TASK for uniprocessor systems
On UP systems, only a single task can be 'current' at the same time,
which means we can use a global variable to track it. This means we can
also enable THREAD_INFO_IN_TASK for those systems, as in that case,
thread_info is accessed via current rather than the other way around,
removing the need to store thread_info at the base of the task stack.
This, in turn, permits us to enable IRQ stacks and vmap'ed stacks on UP
systems as well.

To partially mitigate the performance overhead of this arrangement, use
a ADD/ADD/LDR sequence with the appropriate PC-relative group
relocations to load the value of current when needed. This means that
accessing current will still only require a single load as before,
avoiding the need for a literal to carry the address of the global
variable in each function. However, accessing thread_info will now
require this load as well.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
2021-12-06 12:49:17 +01:00
Ard Biesheuvel
b87cf9118e ARM: use TLS register for 'current' on !SMP as well
Enable the use of the TLS register to hold the 'current' pointer also on
non-SMP configurations that target v6k or later CPUs. This will permit
the use of THREAD_INFO_IN_TASK as well as IRQ stacks and vmap'ed stacks
for such configurations.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
2021-12-06 12:49:17 +01:00
Arnd Bergmann
54f481a230 ARM: remove old-style irq entry
The last user of arch_irq_handler_default is gone now, so the
entry-macro-multi.S file and all references to mach/entry-macro.S can
be removed, as well as the asm_do_IRQ() entrypoint into the interrupt
handling routines implemented in C.

Note: The ARMv7-M entry still uses its own top-level IRQ entry, calling
nvic_handle_irq() from assembly. This could be changed to go through
generic_handle_arch_irq() as well, but it's unclear to me if there are
any benefits.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
[ardb: keep irq_handler macro as it carries all the IRQ stack handling]
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
2021-12-06 12:49:11 +01:00
Arnd Bergmann
6f5d248d05 ARM: iop32x: use GENERIC_IRQ_MULTI_HANDLER
iop32x uses the entry-macro.S file for both the IRQ entry and for
hooking into the arch_ret_to_user code path. This is done because the
cp6 registers have to be enabled before accessing any of the interrupt
controller registers but have to be disabled when running in user space.

There is also a lazy-enable logic in cp6.c, but during a hardirq, we
know it has to be enabled.

Both the cp6-enable code and the code to read the IRQ status can be
lifted into the normal generic_handle_arch_irq() path, but the
cp6-disable code has to remain in the user return code. As nothing
other than iop32x uses this hook, just open-code it there with an
ifdef for the platform that can eventually be removed when iop32x
has reached the end of its life.

The cp6-enable path in the IRQ entry has an extra cp_wait barrier that
the trap version does not have, but it is harmless to do it in both
cases to simplify the logic here at the cost of a few extra cycles
for the trap.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
2021-12-06 12:49:04 +01:00
Arnd Bergmann
90890f17cc ARM: footbridge: use GENERIC_IRQ_MULTI_HANDLER
Footbridge still uses the classic IRQ entry path in assembler,
but this is easily converted into an equivalent C version.

In this case, the correlation between IRQ numbers and bits in
the status register is non-obvious, and the priorities are
handled by manually checking each bit in a static order,
re-reading the status register after each handled event.

I moved the code into the new file and edited the syntax without
changing this sequence to keep the behavior as close as possible
to what it traditionally did.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
2021-12-06 12:48:47 +01:00
Arnd Bergmann
c1fe8d054c ARM: riscpc: use GENERIC_IRQ_MULTI_HANDLER
This is one of the last platforms using the old entry path.
While this code path is spread over a few files, it is fairly
straightforward to convert it into an equivalent C version,
leaving the existing algorithm and all the priority handling
the same.

Unlike most irqchip drivers, this means reading the status
register(s) in a loop and always handling the highest-priority
irq first.

The IOMD_IRQREQC and IOMD_IRQREQD registers are not actaully
used here, but I left the code in place for the time being,
to keep the conversion as direct as possible. It could be
removed in a cleanup on top.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
[ardb: drop obsolete IOMD_IRQREQC/IOMD_IRQREQD handling]
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
2021-12-03 18:43:38 +01:00
Ard Biesheuvel
a1c510d0ad ARM: implement support for vmap'ed stacks
Wire up the generic support for managing task stack allocations via vmalloc,
and implement the entry code that detects whether we faulted because of a
stack overrun (or future stack overrun caused by pushing the pt_regs array)

While this adds a fair amount of tricky entry asm code, it should be
noted that it only adds a TST + branch to the svc_entry path. The code
implementing the non-trivial handling of the overflow stack is emitted
out-of-line into the .text section.

Since on ARM, we rely on do_translation_fault() to keep PMD level page
table entries that cover the vmalloc region up to date, we need to
ensure that we don't hit such a stale PMD entry when accessing the
stack. So we do a dummy read from the new stack while still running from
the old one on the context switch path, and bump the vmalloc_seq counter
when PMD level entries in the vmalloc range are modified, so that the MM
switch fetches the latest version of the entries.

Note that we need to increase the per-mode stack by 1 word, to gain some
space to stash a GPR until we know it is safe to touch the stack.
However, due to the cacheline alignment of the struct, this does not
actually increase the memory footprint of the struct stack array at all.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Keith Packard <keithpac@amazon.com>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
2021-12-03 15:11:33 +01:00
Ard Biesheuvel
9974f85776 ARM: run softirqs on the per-CPU IRQ stack
Now that we have enabled IRQ stacks, any softIRQs that are handled over
the back of a hard IRQ will run from the IRQ stack as well. However, any
synchronous softirq processing that happens when re-enabling softIRQs
from task context will still execute on that task's stack.

Since any call to local_bh_enable() at any level in the task's call
stack may trigger a softIRQ processing run, which could potentially
cause a task stack overflow if the combined stack footprints exceed the
stack's size, let's run these synchronous invocations of do_softirq() on
the IRQ stack as well.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Keith Packard <keithpac@amazon.com>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
2021-12-03 15:11:32 +01:00
Ard Biesheuvel
d4664b6c98 ARM: implement IRQ stacks
Now that we no longer rely on the stack pointer to access the current
task struct or thread info, we can implement support for IRQ stacks
cleanly as well.

Define a per-CPU IRQ stack and switch to this stack when taking an IRQ,
provided that we were not already using that stack in the interrupted
context. This is never the case for IRQs taken from user space, but ones
taken while running in the kernel could fire while one taken from user
space has not completed yet.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Keith Packard <keithpac@amazon.com>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
2021-12-03 15:11:31 +01:00
Ard Biesheuvel
f05eb1d24e ARM: stackprotector: prefer compiler for TLS based per-task protector
Currently, we implement the per-task stack protector for ARM using a GCC
plugin, due to lack of native compiler support. However, work is
underway to get this implemented in the compiler, which means we will be
able to deprecate the GCC plugin at some point.

In the meantime, we will need to support both, where the native compiler
implementation is obviously preferred. So let's wire this up in Kconfig
and the Makefile.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
2021-12-03 15:11:30 +01:00
Arnd Bergmann
3297481d68 futex: Remove futex_cmpxchg detection
Now that all architectures have a working futex implementation in any
configuration, remove the runtime detection code.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Acked-by: Vineet Gupta <vgupta@kernel.org>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Link: https://lore.kernel.org/r/20211026100432.1730393-2-arnd@kernel.org
2021-11-25 00:02:28 +01:00
Sam Protsenko
3ac5f9db26 ARM: samsung: Remove HAVE_S3C2410_I2C and use direct dependencies
A separate Kconfig option HAVE_S3C2410_I2C for Samsung SoCs is not
really needed and the i2c-s3c24xx driver can depend on Samsung ARM
architectures instead. This also enables i2c-s3c2410 for arm64 Exynos
SoCs, which is required for example by Exynos850.

This is basically continuation of work made in following commits:
  - commit d96890fca9 ("rtc: s3c: remove HAVE_S3C_RTC in favor of
    direct dependencies")
  - commit 7dd3cae90d ("ARM: samsung: remove HAVE_S3C2410_WATCHDOG and
    use direct dependencies")

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20211121150558.21801-2-semen.protsenko@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
2021-11-21 17:46:18 +01:00
Ard Biesheuvel
825c43f50e kmap_local: don't assume kmap PTEs are linear arrays in memory
The kmap_local conversion broke the ARM architecture, because the new
code assumes that all PTEs used for creating kmaps form a linear array
in memory, and uses array indexing to look up the kmap PTE belonging to
a certain kmap index.

On ARM, this cannot work, not only because the PTE pages may be
non-adjacent in memory, but also because ARM/!LPAE interleaves hardware
entries and extended entries (carrying software-only bits) in a way that
is not compatible with array indexing.

Fortunately, this only seems to affect configurations with more than 8
CPUs, due to the way the per-CPU kmap slots are organized in memory.

Work around this by permitting an architecture to set a Kconfig symbol
that signifies that the kmap PTEs do not form a lineary array in memory,
and so the only way to locate the appropriate one is to walk the page
tables.

Link: https://lore.kernel.org/linux-arm-kernel/20211026131249.3731275-1-ardb@kernel.org/
Link: https://lkml.kernel.org/r/20211116094737.7391-1-ardb@kernel.org
Fixes: 2a15ba82fa ("ARM: highmem: Switch to generic kmap atomic")
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reported-by: Quanyang Wang <quanyang.wang@windriver.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-11-20 10:35:54 -08:00
Linus Torvalds
d461e96cd2 ARM: SoC drivers for 5.16
These are all the driver updates for SoC specific drivers. There
 are a couple of subsystems with individual maintainers picking up
 their patches here:
 
  - The reset controller subsystem add support for a few new SoC
    variants to existing drivers, along with other minor improvements
 
  - The OP-TEE subsystem gets a driver for the ARM FF-A transport
 
  - The memory controller subsystem has improvements for Tegra,
    Mediatek, Renesas, Freescale and Broadcom specific drivers.
 
  - The tegra cpuidle driver changes get merged through this
    tree this time. There are only minor changes, but they depend
    on other tegra driver updates here.
 
  - The ep93xx platform finally moves to using the drivers/clk/
    subsystem, moving the code out of arch/arm in the process.
    This depends on a small sound driver change that is included
    here as well.
 
  - There are some minor updates for Qualcomm and Tegra specific
    firmware drivers.
 
 The other driver updates are mainly for drivers/soc, which contains
 a mixture of vendor specific drivers that don't really fit elsewhere:
 
  - Mediatek drivers gain more support for MT8192, with new support for
    hw-mutex and mmsys routing, plus support for reset lines in the
    mmsys driver.
 
  - Qualcomm gains a new "sleep stats" driver, and support for
    the "Generic Packet Router" in the APR driver.
 
  - There is a new user interface for routing the UARTS on ASpeed
    BMCs, something that apparently nobody else has needed so far.
 
  - More drivers can now be built as loadable modules, in particular
    for Broadcom and Samsung platforms.
 
  - Lots of improvements to the TI sysc driver for better suspend/resume
    support
 
 Finally, there are lots of minor cleanups and new device IDs for
 amlogic, renesas, tegra, qualcomm, mediateka, samsung, imx, layerscape,
 allwinner, broadcom, and omap.
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Merge tag 'drivers-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC driver updates from Arnd Bergmann:
 "These are all the driver updates for SoC specific drivers. There are a
  couple of subsystems with individual maintainers picking up their
  patches here:

   - The reset controller subsystem add support for a few new SoC
     variants to existing drivers, along with other minor improvements

   - The OP-TEE subsystem gets a driver for the ARM FF-A transport

   - The memory controller subsystem has improvements for Tegra,
     Mediatek, Renesas, Freescale and Broadcom specific drivers.

   - The tegra cpuidle driver changes get merged through this tree this
     time. There are only minor changes, but they depend on other tegra
     driver updates here.

   - The ep93xx platform finally moves to using the drivers/clk/
     subsystem, moving the code out of arch/arm in the process. This
     depends on a small sound driver change that is included here as
     well.

   - There are some minor updates for Qualcomm and Tegra specific
     firmware drivers.

  The other driver updates are mainly for drivers/soc, which contains a
  mixture of vendor specific drivers that don't really fit elsewhere:

   - Mediatek drivers gain more support for MT8192, with new support for
     hw-mutex and mmsys routing, plus support for reset lines in the
     mmsys driver.

   - Qualcomm gains a new "sleep stats" driver, and support for the
     "Generic Packet Router" in the APR driver.

   - There is a new user interface for routing the UARTS on ASpeed BMCs,
     something that apparently nobody else has needed so far.

   - More drivers can now be built as loadable modules, in particular
     for Broadcom and Samsung platforms.

   - Lots of improvements to the TI sysc driver for better
     suspend/resume support"

  Finally, there are lots of minor cleanups and new device IDs for
  amlogic, renesas, tegra, qualcomm, mediateka, samsung, imx,
  layerscape, allwinner, broadcom, and omap"

* tag 'drivers-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (179 commits)
  optee: Fix spelling mistake "reclain" -> "reclaim"
  Revert "firmware: qcom: scm: Add support for MC boot address API"
  qcom: spm: allow compile-testing
  firmware: arm_ffa: Remove unused 'compat_version' variable
  soc: samsung: exynos-chipid: add exynosautov9 SoC support
  firmware: qcom: scm: Don't break compile test on non-ARM platforms
  soc: qcom: smp2p: Add of_node_put() before goto
  soc: qcom: apr: Add of_node_put() before return
  soc: qcom: qcom_stats: Fix client votes offset
  soc: qcom: rpmhpd: fix sm8350_mxc's peer domain
  dt-bindings: arm: cpus: Document qcom,msm8916-smp enable-method
  ARM: qcom: Add qcom,msm8916-smp enable-method identical to MSM8226
  firmware: qcom: scm: Add support for MC boot address API
  soc: qcom: spm: Add 8916 SPM register data
  dt-bindings: soc: qcom: spm: Document qcom,msm8916-saw2-v3.0-cpu
  soc: qcom: socinfo: Add PM8150C and SMB2351 models
  firmware: qcom_scm: Fix error retval in __qcom_scm_is_call_available()
  soc: aspeed: Add UART routing support
  soc: fsl: dpio: rename the enqueue descriptor variable
  soc: fsl: dpio: use an explicit NULL instead of 0
  ...
2021-11-03 17:00:52 -07:00
Linus Torvalds
ab2e7f4b46 ARM development for 5.16:
- Rejig task/thread info to place thread info in task struct
 - Amba bus cleanups (removing unused functions)
 - Handle Amba device probe without IRQ domains
 - Parse linux,usable-memory-range in decompressor
 - Mark OCRAM as read-only after initialisation
 - Refactor page fault handling
 - Fix PXN handling with LPAE kernels
 - Warning and build fixes from Arnd
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM updates from Russell King:

 - Rejig task/thread info to place thread info in task struct

 - Amba bus cleanups (removing unused functions)

 - Handle Amba device probe without IRQ domains

 - Parse linux,usable-memory-range in decompressor

 - Mark OCRAM as read-only after initialisation

 - Refactor page fault handling

 - Fix PXN handling with LPAE kernels

 - Warning and build fixes from Arnd

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (32 commits)
  ARM: 9151/1: Thumb2: avoid __builtin_thread_pointer() on Clang
  ARM: 9150/1: Fix PID_IN_CONTEXTIDR regression when THREAD_INFO_IN_TASK=y
  ARM: 9147/1: add printf format attribute to early_print()
  ARM: 9146/1: RiscPC needs older gcc version
  ARM: 9145/1: patch: fix BE32 compilation
  ARM: 9144/1: forbid ftrace with clang and thumb2_kernel
  ARM: 9143/1: add CONFIG_PHYS_OFFSET default values
  ARM: 9142/1: kasan: work around LPAE build warning
  ARM: 9140/1: allow compile-testing without machine record
  ARM: 9137/1: disallow CONFIG_THUMB with ARMv4
  ARM: 9136/1: ARMv7-M uses BE-8, not BE-32
  ARM: 9135/1: kprobes: address gcc -Wempty-body warning
  ARM: 9101/1: sa1100/assabet: convert LEDs to gpiod APIs
  ARM: 9131/1: mm: Fix PXN process with LPAE feature
  ARM: 9130/1: mm: Provide die_kernel_fault() helper
  ARM: 9126/1: mm: Kill page table base print in show_pte()
  ARM: 9127/1: mm: Cleanup access_error()
  ARM: 9129/1: mm: Kill task_struct argument for __do_page_fault()
  ARM: 9128/1: mm: Refactor the __do_page_fault()
  ARM: imx6: mark OCRAM mapping read-only
  ...
2021-11-02 11:33:15 -07:00
Russell King (Oracle)
11779842dd Merge branches 'devel-stable' and 'misc' into for-linus 2021-11-02 09:04:22 +00:00
Linus Torvalds
79ef0c0014 Tracing updates for 5.16:
- kprobes: Restructured stack unwinder to show properly on x86 when a stack
   dump happens from a kretprobe callback.
 
 - Fix to bootconfig parsing
 
 - Have tracefs allow owner and group permissions by default (only denying
   others). There's been pressure to allow non root to tracefs in a
   controlled fashion, and using groups is probably the safest.
 
 - Bootconfig memory managament updates.
 
 - Bootconfig clean up to have the tools directory be less dependent on
   changes in the kernel tree.
 
 - Allow perf to be traced by function tracer.
 
 - Rewrite of function graph tracer to be a callback from the function tracer
   instead of having its own trampoline (this change will happen on an arch
   by arch basis, and currently only x86_64 implements it).
 
 - Allow multiple direct trampolines (bpf hooks to functions) be batched
   together in one synchronization.
 
 - Allow histogram triggers to add variables that can perform calculations
   against the event's fields.
 
 - Use the linker to determine architecture callbacks from the ftrace
   trampoline to allow for proper parameter prototypes and prevent warnings
   from the compiler.
 
 - Extend histogram triggers to key off of variables.
 
 - Have trace recursion use bit magic to determine preempt context over if
   branches.
 
 - Have trace recursion disable preemption as all use cases do anyway.
 
 - Added testing for verification of tracing utilities.
 
 - Various small clean ups and fixes.
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Merge tag 'trace-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:

 - kprobes: Restructured stack unwinder to show properly on x86 when a
   stack dump happens from a kretprobe callback.

 - Fix to bootconfig parsing

 - Have tracefs allow owner and group permissions by default (only
   denying others). There's been pressure to allow non root to tracefs
   in a controlled fashion, and using groups is probably the safest.

 - Bootconfig memory managament updates.

 - Bootconfig clean up to have the tools directory be less dependent on
   changes in the kernel tree.

 - Allow perf to be traced by function tracer.

 - Rewrite of function graph tracer to be a callback from the function
   tracer instead of having its own trampoline (this change will happen
   on an arch by arch basis, and currently only x86_64 implements it).

 - Allow multiple direct trampolines (bpf hooks to functions) be batched
   together in one synchronization.

 - Allow histogram triggers to add variables that can perform
   calculations against the event's fields.

 - Use the linker to determine architecture callbacks from the ftrace
   trampoline to allow for proper parameter prototypes and prevent
   warnings from the compiler.

 - Extend histogram triggers to key off of variables.

 - Have trace recursion use bit magic to determine preempt context over
   if branches.

 - Have trace recursion disable preemption as all use cases do anyway.

 - Added testing for verification of tracing utilities.

 - Various small clean ups and fixes.

* tag 'trace-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (101 commits)
  tracing/histogram: Fix semicolon.cocci warnings
  tracing/histogram: Fix documentation inline emphasis warning
  tracing: Increase PERF_MAX_TRACE_SIZE to handle Sentinel1 and docker together
  tracing: Show size of requested perf buffer
  bootconfig: Initialize ret in xbc_parse_tree()
  ftrace: do CPU checking after preemption disabled
  ftrace: disable preemption when recursion locked
  tracing/histogram: Document expression arithmetic and constants
  tracing/histogram: Optimize division by a power of 2
  tracing/histogram: Covert expr to const if both operands are constants
  tracing/histogram: Simplify handling of .sym-offset in expressions
  tracing: Fix operator precedence for hist triggers expression
  tracing: Add division and multiplication support for hist triggers
  tracing: Add support for creating hist trigger variables from literal
  selftests/ftrace: Stop tracing while reading the trace file by default
  MAINTAINERS: Update KPROBES and TRACING entries
  test_kprobes: Move it from kernel/ to lib/
  docs, kprobes: Remove invalid URL and add new reference
  samples/kretprobes: Fix return value if register_kretprobe() failed
  lib/bootconfig: Fix the xbc_get_info kerneldoc
  ...
2021-11-01 20:05:19 -07:00
Linus Torvalds
5a47ebe98e Updates for the interrupt subsystem:
Core changes:
 
   - Prevent a potential deadlock when initial priority is assigned to a
     newly created interrupt thread. A recent change to plug a race between
     cpuset and __sched_setscheduler() introduced a new lock dependency
     which is now triggered. Break the lock dependency chain by moving the
     priority assignment to the thread function.
 
   - A couple of small updates to make the irq core RT safe.
 
   - Confine the irq_cpu_online/offline() API to the only left unfixable
     user Cavium Octeon so that it does not grow new usage.
 
   - A small documentation update
 
  Driver changes:
 
   - A large cross architecture rework to move irq_enter/exit() into the
     architecture code to make addressing the NOHZ_FULL/RCU issues simpler.
 
   - The obligatory new irq chip driver for Microchip EIC
 
   - Modularize a few irq chip drivers
 
   - Expand usage of devm_*() helpers throughout the driver code
 
   - The usual small fixes and improvements all over the place
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Merge tag 'irq-core-2021-10-31' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq updates from Thomas Gleixner:
 "Updates for the interrupt subsystem:

  Core changes:

   - Prevent a potential deadlock when initial priority is assigned to a
     newly created interrupt thread. A recent change to plug a race
     between cpuset and __sched_setscheduler() introduced a new lock
     dependency which is now triggered. Break the lock dependency chain
     by moving the priority assignment to the thread function.

   - A couple of small updates to make the irq core RT safe.

   - Confine the irq_cpu_online/offline() API to the only left unfixable
     user Cavium Octeon so that it does not grow new usage.

   - A small documentation update

  Driver changes:

   - A large cross architecture rework to move irq_enter/exit() into the
     architecture code to make addressing the NOHZ_FULL/RCU issues
     simpler.

   - The obligatory new irq chip driver for Microchip EIC

   - Modularize a few irq chip drivers

   - Expand usage of devm_*() helpers throughout the driver code

   - The usual small fixes and improvements all over the place"

* tag 'irq-core-2021-10-31' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (53 commits)
  h8300: Fix linux/irqchip.h include mess
  dt-bindings: irqchip: renesas-irqc: Document r8a774e1 bindings
  MIPS: irq: Avoid an unused-variable error
  genirq: Hide irq_cpu_{on,off}line() behind a deprecated option
  irqchip/mips-gic: Get rid of the reliance on irq_cpu_online()
  MIPS: loongson64: Drop call to irq_cpu_offline()
  irq: remove handle_domain_{irq,nmi}()
  irq: remove CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY
  irq: riscv: perform irqentry in entry code
  irq: openrisc: perform irqentry in entry code
  irq: csky: perform irqentry in entry code
  irq: arm64: perform irqentry in entry code
  irq: arm: perform irqentry in entry code
  irq: add a (temporary) CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY
  irq: nds32: avoid CONFIG_HANDLE_DOMAIN_IRQ
  irq: arc: avoid CONFIG_HANDLE_DOMAIN_IRQ
  irq: add generic_handle_arch_irq()
  irq: unexport handle_irq_desc()
  irq: simplify handle_domain_{irq,nmi}()
  irq: mips: simplify do_domain_IRQ()
  ...
2021-11-01 13:09:10 -07:00
Arnd Bergmann
64954d19e0 Samsung SoC drivers changes for v5.16
1. Convert Exynos ChipID and ASV driver to a module and make it a
    default, instead of selected. The driver is not essential, so it
    could be disabled, if needed.
 2. Add support for Exynos850 and Exynos Auto v9 to Exynos ChipID and ASV
    driver.
 3. Get rid of HAVE_S3C_RTC because it was adding just another layer
    instead of direct dependencies.
 4. Minor cleanups.
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Merge tag 'samsung-drivers-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into arm/drivers

Samsung SoC drivers changes for v5.16

1. Convert Exynos ChipID and ASV driver to a module and make it a
   default, instead of selected. The driver is not essential, so it
   could be disabled, if needed.
2. Add support for Exynos850 and Exynos Auto v9 to Exynos ChipID and ASV
   driver.
3. Get rid of HAVE_S3C_RTC because it was adding just another layer
   instead of direct dependencies.
4. Minor cleanups.

* tag 'samsung-drivers-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
  soc: samsung: exynos-chipid: add exynosautov9 SoC support
  rtc: s3c: remove HAVE_S3C_RTC in favor of direct dependencies
  soc: samsung: exynos-chipid: Add Exynos850 support
  dt-bindings: samsung: exynos-chipid: Document Exynos850 compatible
  soc: samsung: exynos-chipid: Pass revision reg offsets
  soc: samsung: pm_domains: drop unused is_off field
  arm64: exynos: don't have ARCH_EXYNOS select EXYNOS_CHIPID
  soc: samsung: exynos-chipid: do not enforce built-in
  soc: samsung: exynos-chipid: convert to a module
  soc: samsung: exynos-chipid: avoid soc_device_to_device()
  soc: samsung: exynos-pmu: Fix compilation when nothing selects CONFIG_MFD_CORE

Link: https://lore.kernel.org/r/20211026094709.75692-2-krzysztof.kozlowski@canonical.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-10-26 17:16:03 +02:00
Mark Rutland
0953fb2637 irq: remove handle_domain_{irq,nmi}()
Now that entry code handles IRQ entry (including setting the IRQ regs)
before calling irqchip code, irqchip code can safely call
generic_handle_domain_irq(), and there's no functional reason for it to
call handle_domain_irq().

Let's cement this split of responsibility and remove handle_domain_irq()
entirely, updating irqchip drivers to call generic_handle_domain_irq().

For consistency, handle_domain_nmi() is similarly removed and replaced
with a generic_handle_domain_nmi() function which also does not perform
any entry logic.

Previously handle_domain_{irq,nmi}() had a WARN_ON() which would fire
when they were called in an inappropriate context. So that we can
identify similar issues going forward, similar WARN_ON_ONCE() logic is
added to the generic_handle_*() functions, and comments are updated for
clarity and consistency.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
2021-10-26 10:13:31 +01:00
Linus Torvalds
c2b43854aa ARM updates for 5.15:
- Fix clang-related relocation warning in futex code
 - Fix incorrect use of get_kernel_nofault()
 - Fix bad code generation in __get_user_check() when kasan is enabled
 - Ensure TLB function table is correctly aligned
 - Remove duplicated string function definitions in decompressor
 - Fix link-time orphan section warnings
 - Fix old-style function prototype for arch_init_kprobes()
 - Only warn about XIP address when not compile testing
 - Handle BE32 big endian for keystone2 remapping
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:

 - Fix clang-related relocation warning in futex code

 - Fix incorrect use of get_kernel_nofault()

 - Fix bad code generation in __get_user_check() when kasan is enabled

 - Ensure TLB function table is correctly aligned

 - Remove duplicated string function definitions in decompressor

 - Fix link-time orphan section warnings

 - Fix old-style function prototype for arch_init_kprobes()

 - Only warn about XIP address when not compile testing

 - Handle BE32 big endian for keystone2 remapping

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 9148/1: handle CONFIG_CPU_ENDIAN_BE32 in arch/arm/kernel/head.S
  ARM: 9141/1: only warn about XIP address when not compile testing
  ARM: 9139/1: kprobes: fix arch_init_kprobes() prototype
  ARM: 9138/1: fix link warning with XIP + frame-pointer
  ARM: 9134/1: remove duplicate memcpy() definition
  ARM: 9133/1: mm: proc-macros: ensure *_tlb_fns are 4B aligned
  ARM: 9132/1: Fix __get_user_check failure with ARM KASAN images
  ARM: 9125/1: fix incorrect use of get_kernel_nofault()
  ARM: 9122/1: select HAVE_FUTEX_CMPXCHG
2021-10-25 10:28:52 -07:00
Arnd Bergmann
2abd6e34fc ARM: 9146/1: RiscPC needs older gcc version
Attempting to build mach-rpc with gcc-9 or higher, or with any version
of clang results in a build failure, like:

arm-linux-gnueabi-gcc-11.1.0: error: unrecognized -march target: armv3m
arm-linux-gnueabi-gcc-11.1.0: note: valid arguments are: armv4 armv4t armv5t armv5te armv5tej armv6 armv6j armv6k armv6z armv6kz armv6zk armv6t2 armv6-m armv6s-m armv7 armv7-a armv7ve armv7-r armv7-m armv7e-m armv8-a armv8.1-a armv8.2-a armv8.3-a armv8.4-a armv8.5-a armv8.6-a armv8-m.base armv8-m.main armv8-r armv8.1-m.main iwmmxt iwmmxt2; did you mean 'armv4'?

Building with gcc-5 also fails in at least one of these ways:

/tmp/cczZoCcv.s:68: Error: selected processor does not support `bx lr' in ARM mode
drivers/tty/vt/vt_ioctl.c:958:1: internal compiler error: Segmentation fault

Handle this in Kconfig so we don't run into this with randconfig
builds, allowing only gcc-6 through gcc-8.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2021-10-25 13:12:37 +01:00
Arnd Bergmann
ecb108e3e3 ARM: 9144/1: forbid ftrace with clang and thumb2_kernel
clang fails to build kernels with THUMB2 and FUNCTION_TRACER
enabled when there is any inline asm statement containing
the frame pointer register r7:

arch/arm/mach-exynos/mcpm-exynos.c:154:2: error: inline asm clobber list contains reserved registers: R7 [-Werror,-Winline-asm]
arch/arm/probes/kprobes/actions-thumb.c:449:3: error: inline asm clobber list contains reserved registers: R7 [-Werror,-Winline-asm]

Apparently gcc should also have warned about this, and the
configuration is actually invalid, though there is some
disagreement on the bug trackers about this.

Link: https://bugs.llvm.org/show_bug.cgi?id=45826
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94986

Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2021-10-25 13:12:36 +01:00
Arnd Bergmann
c6e77bb61a ARM: 9143/1: add CONFIG_PHYS_OFFSET default values
For platforms that are not yet converted to ARCH_MULTIPLATFORM,
we can disable CONFIG_ARM_PATCH_PHYS_VIRT, which in turn requires
setting a correct address here.

As we actualy know what all the values are supposed to be based
on the old mach/memory.h header file contents (from git history),
we can just add them here.

This also solves a problem in Kconfig where 'make randconfig'
fails to continue if no number is selected for a 'hex' option.
Users can still override the number at configuration time, e.g.
when the memory visible to the kernel starts at a nonstandard
address on some machine, but it should no longer be required
now.

I originally posted this back in 2016, but the problem still
persists. The patch has gotten much simpler though, as almost
all platforms rely on ARM_PATCH_PHYS_VIRT now.

Link: https://lore.kernel.org/linux-arm-kernel/1455804123-2526139-5-git-send-email-arnd@arndb.de/

Acked-by: Nicolas Pitre <nico@fluxnic.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2021-10-25 13:12:35 +01:00
Mark Rutland
a7b0872e96 irq: arm: perform irqentry in entry code
In preparation for removing HANDLE_DOMAIN_IRQ_IRQENTRY, have arch/arm
perform all the irqentry accounting in its entry code.

For configurations with CONFIG_GENERIC_IRQ_MULTI_HANDLER, we can use
generic_handle_arch_irq(). Other than asm_do_IRQ(), all C calls to
handle_IRQ() are from irqchip handlers which will be called from
generic_handle_arch_irq(), so to avoid double accounting IRQ entry, the
entry logic is moved from handle_IRQ() into asm_do_IRQ().

For ARMv7M the entry assembly is tightly coupled with the NVIC irqchip, and
while the entry code should logically live under arch/arm/, moving the
entry logic there makes things more convoluted. So for now, place the
entry logic in the NVIC irqchip, but separated into a separate
function to make the split of responsibility clear.

For all other configurations without CONFIG_GENERIC_IRQ_MULTI_HANDLER,
IRQ entry is already handled in arch code, and requires no changes.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
2021-10-25 10:05:31 +01:00
Mark Rutland
2fe35f8ee7 irq: add a (temporary) CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY
Going forward we want architecture/entry code to perform all the
necessary work to enter/exit IRQ context, with irqchip code merely
handling the mapping of the interrupt to any handler(s). Among other
reasons, this is necessary to consistently fix some longstanding issues
with the ordering of lockdep/RCU/tracing instrumentation which many
architectures get wrong today in their entry code.

Importantly, rcu_irq_{enter,exit}() must be called precisely once per
IRQ exception, so that rcu_is_cpu_rrupt_from_idle() can correctly
identify when an interrupt was taken from an idle context which must be
explicitly preempted. Currently handle_domain_irq() calls
rcu_irq_{enter,exit}() via irq_{enter,exit}(), but entry code needs to
be able to call rcu_irq_{enter,exit}() earlier for correct ordering
across lockdep/RCU/tracing updates for sequences such as:

  lockdep_hardirqs_off(CALLER_ADDR0);
  rcu_irq_enter();
  trace_hardirqs_off_finish();

To permit each architecture to be converted to the new style in turn,
this patch adds a new CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY selected by all
current users of HANDLE_DOMAIN_IRQ, which gates the existing behaviour.
When CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY is not selected,
handle_domain_irq() requires entry code to perform the
irq_{enter,exit}() work, with an explicit check for this matching the
style of handle_domain_nmi().

Subsequent patches will:

1) Add the necessary IRQ entry accounting to each architecture in turn,
   dropping CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY from that architecture's
   Kconfig.

2) Remove CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY once it is no longer
   selected.

3) Convert irqchip drivers to consistently use
   generic_handle_domain_irq() rather than handle_domain_irq().

4) Remove handle_domain_irq() and CONFIG_HANDLE_DOMAIN_IRQ.

... which should leave us with a clear split of responsiblity across the
entry and irqchip code, making it possible to perform additional
cleanups and fixes for the aforementioned longstanding issues with entry
code.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
2021-10-25 10:05:30 +01:00
Masami Hiramatsu
fed240d9c9 ARM: Recover kretprobe modified return address in stacktrace
Since the kretprobe replaces the function return address with
the kretprobe_trampoline on the stack, arm unwinder shows it
instead of the correct return address.

This finds the correct return address from the per-task
kretprobe_instances list and verify it is in between the
caller fp and callee fp.

Note that this supports both GCC and clang if CONFIG_FRAME_POINTER=y
and CONFIG_ARM_UNWIND=n. For the ARM unwinder, this is still
not working correctly.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2021-10-22 12:16:53 -04:00
Nikita Shubin
9645ccc7bd
ep93xx: clock: convert in-place to COMMON_CLK
Converted in-place without moving file to drivers/clk.

tested on ts7250 (EP9302).

Only setting rate and change parent tested for, as they
are missing on ts7250:
- video
- I2S
- ADC/KEYPAD
- PWM

Only video and I2S clock are interesting, as they are
GATE + double DIV + MUX, all other are pretty much
common but require ep93xx_syscon_swlocked_write to set
registers.

Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Tested-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Link: https://lore.kernel.org/r/20211018103105.146380-3-alexander.sverdlin@gmail.com'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-10-20 17:46:36 +02:00
Nick Desaulniers
9d417cbe36 ARM: 9122/1: select HAVE_FUTEX_CMPXCHG
tglx notes:
  This function [futex_detect_cmpxchg] is only needed when an
  architecture has to runtime discover whether the CPU supports it or
  not.  ARM has unconditional support for this, so the obvious thing to
  do is the below.

Fixes linkage failure from Clang randconfigs:
kernel/futex.o:(.text.fixup+0x5c): relocation truncated to fit: R_ARM_JUMP24 against `.init.text'
and boot failures for CONFIG_THUMB2_KERNEL.

Link: https://github.com/ClangBuiltLinux/linux/issues/325

Comments from Nick Desaulniers:

 See-also: 03b8c7b623 ("futex: Allow architectures to skip
 futex_atomic_cmpxchg_inatomic() test")

Reported-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: Nathan Chancellor <nathan@kernel.org>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: stable@vger.kernel.org # v3.14+
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2021-10-19 10:37:34 +01:00
Will McVicker
d96890fca9 rtc: s3c: remove HAVE_S3C_RTC in favor of direct dependencies
The config HAVE_S3C_RTC is not really needed since we can simply just
add the dependencies directly to RTC_DRV_S3C. Also, one less config to
keep track of!

Signed-off-by: Will McVicker <willmcvicker@google.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20211013212256.3425889-1-willmcvicker@google.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
2021-10-17 19:15:12 +02:00
Arnd Bergmann
951cd3a086
firmware: include drivers/firmware/Kconfig unconditionally
Compile-testing drivers that require access to a firmware layer
fails when that firmware symbol is unavailable. This happened
twice this week:

 - My proposed to change to rework the QCOM_SCM firmware symbol
   broke on ppc64 and others.

 - The cs_dsp firmware patch added device specific firmware loader
   into drivers/firmware, which broke on the same set of
   architectures.

We should probably do the same thing for other subsystems as well,
but fix this one first as this is a dependency for other patches
getting merged.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Charles Keepax <ckeepax@opensource.cirrus.com>
Cc: Simon Trimmer <simont@opensource.cirrus.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-10-07 16:51:26 +02:00
Ard Biesheuvel
18ed1c01a7 ARM: smp: Enable THREAD_INFO_IN_TASK
Now that we no longer rely on thread_info living at the base of the task
stack to be able to access the 'current' pointer, we can wire up the
generic support for moving thread_info into the task struct itself.

Note that this requires us to update the cpu field in thread_info
explicitly, now that the core code no longer does so. Ideally, we would
switch the percpu code to access the cpu field in task_struct instead,
but this unleashes #include circular dependency hell.

Co-developed-by: Keith Packard <keithpac@amazon.com>
Signed-off-by: Keith Packard <keithpac@amazon.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
2021-09-27 16:54:02 +02:00
Ard Biesheuvel
50596b7559 ARM: smp: Store current pointer in TPIDRURO register if available
Now that the user space TLS register is assigned on every return to user
space, we can use it to keep the 'current' pointer while running in the
kernel. This removes the need to access it via thread_info, which is
located at the base of the stack, but will be moved out of there in a
subsequent patch.

Use the __builtin_thread_pointer() helper when available - this will
help GCC understand that reloading the value within the same function is
not necessary, even when using the per-task stack protector (which also
generates accesses via the TLS register). For example, the generated
code below loads TPIDRURO only once, and uses it to access both the
stack canary and the preempt_count fields.

<do_one_initcall>:
       e92d 41f0       stmdb   sp!, {r4, r5, r6, r7, r8, lr}
       ee1d 4f70       mrc     15, 0, r4, cr13, cr0, {3}
       4606            mov     r6, r0
       b094            sub     sp, #80 ; 0x50
       f8d4 34e8       ldr.w   r3, [r4, #1256] ; 0x4e8  <- stack canary
       9313            str     r3, [sp, #76]   ; 0x4c
       f8d4 8004       ldr.w   r8, [r4, #4]             <- preempt count

Co-developed-by: Keith Packard <keithpac@amazon.com>
Signed-off-by: Keith Packard <keithpac@amazon.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
2021-09-27 16:54:02 +02:00
Ard Biesheuvel
dfbdcda280 gcc-plugins: arm-ssp: Prepare for THREAD_INFO_IN_TASK support
We will be enabling THREAD_INFO_IN_TASK support for ARM, which means
that we can no longer load the stack canary value by masking the stack
pointer and taking the copy that lives in thread_info. Instead, we will
be able to load it from the task_struct directly, by using the TPIDRURO
register which will hold the current task pointer when
THREAD_INFO_IN_TASK is in effect. This is much more straight-forward,
and allows us to declutter this code a bit while at it.

Note that this means that ARMv6 (non-v6K) SMP systems can no longer use
this feature, but those are quite rare to begin with, so this is a
reasonable trade off.

Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
2021-09-27 16:54:01 +02:00
Linus Torvalds
35776f1051 ARM development updates for 5.15:
- Rename "mod_init" and "mod_exit" so that initcall debug output is
   actually useful (Randy Dunlap)
 - Update maintainers entries for linux-arm-kernel to indicate it is
   moderated for non-subscribers (Randy Dunlap)
 - Move install rules to arch/arm/Makefile (Masahiro Yamada)
 - Drop unnecessary ARCH_NR_GPIOS definition (Linus Walleij)
 - Don't warn about atags_to_fdt() stack size (David Heidelberg)
 - Speed up unaligned copy_{from,to}_kernel_nofault (Arnd Bergmann)
 - Get rid of set_fs() usage (Arnd Bergmann)
 - Remove checks for GCC prior to v4.6 (Geert Uytterhoeven)
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM development updates from Russell King:

 - Rename "mod_init" and "mod_exit" so that initcall debug output is
   actually useful (Randy Dunlap)

 - Update maintainers entries for linux-arm-kernel to indicate it is
   moderated for non-subscribers (Randy Dunlap)

 - Move install rules to arch/arm/Makefile (Masahiro Yamada)

 - Drop unnecessary ARCH_NR_GPIOS definition (Linus Walleij)

 - Don't warn about atags_to_fdt() stack size (David Heidelberg)

 - Speed up unaligned copy_{from,to}_kernel_nofault (Arnd Bergmann)

 - Get rid of set_fs() usage (Arnd Bergmann)

 - Remove checks for GCC prior to v4.6 (Geert Uytterhoeven)

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 9118/1: div64: Remove always-true __div64_const32_is_OK() duplicate
  ARM: 9117/1: asm-generic: div64: Remove always-true __div64_const32_is_OK()
  ARM: 9116/1: unified: Remove check for gcc < 4
  ARM: 9110/1: oabi-compat: fix oabi epoll sparse warning
  ARM: 9113/1: uaccess: remove set_fs() implementation
  ARM: 9112/1: uaccess: add __{get,put}_kernel_nofault
  ARM: 9111/1: oabi-compat: rework fcntl64() emulation
  ARM: 9114/1: oabi-compat: rework sys_semtimedop emulation
  ARM: 9108/1: oabi-compat: rework epoll_wait/epoll_pwait emulation
  ARM: 9107/1: syscall: always store thread_info->abi_syscall
  ARM: 9109/1: oabi-compat: add epoll_pwait handler
  ARM: 9106/1: traps: use get_kernel_nofault instead of set_fs()
  ARM: 9115/1: mm/maccess: fix unaligned copy_{from,to}_kernel_nofault
  ARM: 9105/1: atags_to_fdt: don't warn about stack size
  ARM: 9103/1: Drop ARCH_NR_GPIOS definition
  ARM: 9102/1: move theinstall rules to arch/arm/Makefile
  ARM: 9100/1: MAINTAINERS: mark all linux-arm-kernel@infradead list as moderated
  ARM: 9099/1: crypto: rename 'mod_init' & 'mod_exit' functions to be module-specific
2021-09-09 13:25:49 -07:00
Linus Torvalds
58ca241587 Tracing updates for 5.15:
- Simplifying the Kconfig use of FTRACE and TRACE_IRQFLAGS_SUPPORT
 
  - bootconfig now can start histograms
 
  - bootconfig supports group/all enabling
 
  - histograms now can put values in linear size buckets
 
  - execnames can be passed to synthetic events
 
  - Introduction of "event probes" that attach to other events and
    can retrieve data from pointers of fields, or record fields
    as different types (a pointer to a string as a string instead
    of just a hex number)
 
  - Various fixes and clean ups
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Merge tag 'trace-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:

 - simplify the Kconfig use of FTRACE and TRACE_IRQFLAGS_SUPPORT

 - bootconfig can now start histograms

 - bootconfig supports group/all enabling

 - histograms now can put values in linear size buckets

 - execnames can be passed to synthetic events

 - introduce "event probes" that attach to other events and can retrieve
   data from pointers of fields, or record fields as different types (a
   pointer to a string as a string instead of just a hex number)

 - various fixes and clean ups

* tag 'trace-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (35 commits)
  tracing/doc: Fix table format in histogram code
  selftests/ftrace: Add selftest for testing duplicate eprobes and kprobes
  selftests/ftrace: Add selftest for testing eprobe events on synthetic events
  selftests/ftrace: Add test case to test adding and removing of event probe
  selftests/ftrace: Fix requirement check of README file
  selftests/ftrace: Add clear_dynamic_events() to test cases
  tracing: Add a probe that attaches to trace events
  tracing/probes: Reject events which have the same name of existing one
  tracing/probes: Have process_fetch_insn() take a void * instead of pt_regs
  tracing/probe: Change traceprobe_set_print_fmt() to take a type
  tracing/probes: Use struct_size() instead of defining custom macros
  tracing/probes: Allow for dot delimiter as well as slash for system names
  tracing/probe: Have traceprobe_parse_probe_arg() take a const arg
  tracing: Have dynamic events have a ref counter
  tracing: Add DYNAMIC flag for dynamic events
  tracing: Replace deprecated CPU-hotplug functions.
  MAINTAINERS: Add an entry for os noise/latency
  tracepoint: Fix kerneldoc comments
  bootconfig/tracing/ktest: Update ktest example for boot-time tracing
  tools/bootconfig: Use per-group/all enable option in ftrace2bconf script
  ...
2021-09-05 11:50:41 -07:00
Linus Torvalds
4a3bb4200a dma-mapping updates for Linux 5.15
- fix debugfs initialization order (Anthony Iliopoulos)
  - use memory_intersects() directly (Kefeng Wang)
  - allow to return specific errors from ->map_sg
    (Logan Gunthorpe, Martin Oliveira)
  - turn the dma_map_sg return value into an unsigned int (me)
  - provide a common global coherent pool іmplementation (me)
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Merge tag 'dma-mapping-5.15' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping updates from Christoph Hellwig:

 - fix debugfs initialization order (Anthony Iliopoulos)

 - use memory_intersects() directly (Kefeng Wang)

 - allow to return specific errors from ->map_sg (Logan Gunthorpe,
   Martin Oliveira)

 - turn the dma_map_sg return value into an unsigned int (me)

 - provide a common global coherent pool іmplementation (me)

* tag 'dma-mapping-5.15' of git://git.infradead.org/users/hch/dma-mapping: (31 commits)
  hexagon: use the generic global coherent pool
  dma-mapping: make the global coherent pool conditional
  dma-mapping: add a dma_init_global_coherent helper
  dma-mapping: simplify dma_init_coherent_memory
  dma-mapping: allow using the global coherent pool for !ARM
  ARM/nommu: use the generic dma-direct code for non-coherent devices
  dma-direct: add support for dma_coherent_default_memory
  dma-mapping: return an unsigned int from dma_map_sg{,_attrs}
  dma-mapping: disallow .map_sg operations from returning zero on error
  dma-mapping: return error code from dma_dummy_map_sg()
  x86/amd_gart: don't set failed sg dma_address to DMA_MAPPING_ERROR
  x86/amd_gart: return error code from gart_map_sg()
  xen: swiotlb: return error code from xen_swiotlb_map_sg()
  parisc: return error code from .map_sg() ops
  sparc/iommu: don't set failed sg dma_address to DMA_MAPPING_ERROR
  sparc/iommu: return error codes from .map_sg() ops
  s390/pci: don't set failed sg dma_address to DMA_MAPPING_ERROR
  s390/pci: return error code from s390_dma_map_sg()
  powerpc/iommu: don't set failed sg dma_address to DMA_MAPPING_ERROR
  powerpc/iommu: return error code from .map_sg() ops
  ...
2021-09-02 10:32:06 -07:00
Linus Torvalds
4cdc4cc2ad asm-generic changes for 5.15
The main content for 5.15 is a series that cleans up the handling of
 strncpy_from_user() and strnlen_user(), removing a lot of slightly
 incorrect versions of these in favor of the lib/strn*.c helpers
 that implement these correctly and more efficiently.
 
 The only architectures that retain a private version now are
 mips, ia64, um and parisc. I had offered to convert those at all,
 but Thomas Bogendoerfer wanted to keep the mips version for the
 moment until he had a chance to do regression testing.
 
 The branch also contains two patches for bitops and for ffs().
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'asm-generic-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic updates from Arnd Bergmann:
 "The main content for 5.15 is a series that cleans up the handling of
  strncpy_from_user() and strnlen_user(), removing a lot of slightly
  incorrect versions of these in favor of the lib/strn*.c helpers that
  implement these correctly and more efficiently.

  The only architectures that retain a private version now are mips,
  ia64, um and parisc. I had offered to convert those at all, but Thomas
  Bogendoerfer wanted to keep the mips version for the moment until he
  had a chance to do regression testing.

  The branch also contains two patches for bitops and for ffs()"

* tag 'asm-generic-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  bitops/non-atomic: make @nr unsigned to avoid any DIV
  asm-generic: ffs: Drop bogus reference to ffz location
  asm-generic: reverse GENERIC_{STRNCPY_FROM,STRNLEN}_USER symbols
  asm-generic: remove extra strn{cpy_from,len}_user declarations
  asm-generic: uaccess: remove inline strncpy_from_user/strnlen_user
  s390: use generic strncpy/strnlen from_user
  microblaze: use generic strncpy/strnlen from_user
  csky: use generic strncpy/strnlen from_user
  arc: use generic strncpy/strnlen from_user
  hexagon: use generic strncpy/strnlen from_user
  h8300: remove stale strncpy_from_user
  asm-generic/uaccess.h: remove __strncpy_from_user/__strnlen_user
2021-09-01 15:13:02 -07:00
Arnd Bergmann
8ac6f5d7f8 ARM: 9113/1: uaccess: remove set_fs() implementation
There are no remaining callers of set_fs(), so just remove it
along with all associated code that operates on
thread_info->addr_limit.

There are still further optimizations that can be done:

- In get_user(), the address check could be moved entirely
  into the out of line code, rather than passing a constant
  as an argument,

- I assume the DACR handling can be simplified as we now
  only change it during user access when CONFIG_CPU_SW_DOMAIN_PAN
  is set, but not during set_fs().

Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2021-08-20 11:39:27 +01:00
Christoph Hellwig
31b089bbc1 ARM/nommu: use the generic dma-direct code for non-coherent devices
Select the right options to just use the generic dma-direct code
instead of reimplementing it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Dillon Min <dillon.minfei@gmail.com>
2021-08-18 16:24:10 +02:00
Masahiro Yamada
4aae683f13 tracing: Refactor TRACE_IRQFLAGS_SUPPORT in Kconfig
Make architectures select TRACE_IRQFLAGS_SUPPORT instead of
having many defines.

Link: https://lkml.kernel.org/r/20210731052233.4703-2-masahiroy@kernel.org

Acked-by: Heiko Carstens <hca@linux.ibm.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>   #arch/arc
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2021-08-16 11:37:21 -04:00
Linus Torvalds
f6c5971bb7 libata-5.14-2021-07-30
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Merge tag 'libata-5.14-2021-07-30' of git://git.kernel.dk/linux-block

Pull libata fixlets from Jens Axboe:

 - A fix for PIO highmem (Christoph)

 - Kill HAVE_IDE as it's now unused (Lukas)

* tag 'libata-5.14-2021-07-30' of git://git.kernel.dk/linux-block:
  arch: Kconfig: clean up obsolete use of HAVE_IDE
  libata: fix ata_pio_sector for CONFIG_HIGHMEM
2021-07-30 10:56:47 -07:00
Lukas Bulwahn
094121ef81 arch: Kconfig: clean up obsolete use of HAVE_IDE
The arch-specific Kconfig files use HAVE_IDE to indicate if IDE is
supported.

As IDE support and the HAVE_IDE config vanishes with commit b7fb14d3ac
("ide: remove the legacy ide driver"), there is no need to mention
HAVE_IDE in all those arch-specific Kconfig files.

The issue was identified with ./scripts/checkkconfigsymbols.py.

Fixes: b7fb14d3ac ("ide: remove the legacy ide driver")
Suggested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20210728182115.4401-1-lukas.bulwahn@gmail.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-07-30 08:19:09 -06:00
Arnd Bergmann
e6226997ec asm-generic: reverse GENERIC_{STRNCPY_FROM,STRNLEN}_USER symbols
Most architectures do not need a custom implementation, and in most
cases the generic implementation is preferred, so change the polariy
on these Kconfig symbols to require architectures to select them when
they provide their own version.

The new name is CONFIG_ARCH_HAS_{STRNCPY_FROM,STRNLEN}_USER.

The remaining architectures at the moment are: ia64, mips, parisc,
um and xtensa. We should probably convert these as well, but
I was not sure how far to take this series. Thomas Bogendoerfer
had some concerns about converting mips but may still do some
more detailed measurements to see which version is better.

Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: linux-ia64@vger.kernel.org
Cc: linux-mips@vger.kernel.org
Cc: linux-parisc@vger.kernel.org
Cc: linux-s390@vger.kernel.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Helge Deller <deller@gmx.de> # parisc
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-07-30 10:30:21 +02:00
Geert Uytterhoeven
5f291bfd33
arm: Typo s/PCI_IXP4XX_LEGACY/IXP4XX_PCI_LEGACY/
Kconfig symbol PCI_IXP4XX_LEGACY does not exist, but IXP4XX_PCI_LEGACY
does.

Fixes: d5d9f7ac58 ("ARM/ixp4xx: Make NEED_MACH_IO_H optional")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/82ce37c617293521f095a945a255456b9512769c.1626255077.git.geert+renesas@glider.be'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-07-16 23:00:11 +02:00
Linus Torvalds
6e207b8821 ARM: SoC changes for 5.14
A few SoC (code) changes have queued up this cycle, mostly for minor
 changes and some refactoring and cleanup of legacy platforms. This
 branch also contains a few of the fixes that weren't sent in by the end
 of the release (all fairly minor).
 
  - Adding an additional maintainer for the TEE subsystem (Sumit Garg)
 
  - Quite a significant modernization of the IXP4xx platforms by Linus
    Walleij, revisiting with a new PCI host driver/binding, removing legacy
    mach/* include dependencies and moving platform detection/config to
    drivers/soc. Also some updates/cleanup of platform data.
 
  - Core power domain support for Tegra platforms, and some improvements
    in build test coverage by adding stubs for compile test targets.
 
  - A handful of updates to i.MX platforms, adding legacy (non-PSCI) SMP
    support on i.MX7D, SoC ID setup for i.MX50, removal of platform data
    and board fixups for iMX6/7.
 
  ... and a few smaller changes and fixes for Samsung, OMAP, Allwinner,
  Rockchip.
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Merge tag 'arm-soc-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC updates from Olof Johansson:
 "A few SoC (code) changes have queued up this cycle, mostly for minor
  changes and some refactoring and cleanup of legacy platforms. This
  branch also contains a few of the fixes that weren't sent in by the
  end of the release (all fairly minor).

   - Adding an additional maintainer for the TEE subsystem (Sumit Garg)

   - Quite a significant modernization of the IXP4xx platforms by Linus
     Walleij, revisiting with a new PCI host driver/binding, removing
     legacy mach/* include dependencies and moving platform
     detection/config to drivers/soc. Also some updates/cleanup of
     platform data.

   - Core power domain support for Tegra platforms, and some
     improvements in build test coverage by adding stubs for compile
     test targets.

   - A handful of updates to i.MX platforms, adding legacy (non-PSCI)
     SMP support on i.MX7D, SoC ID setup for i.MX50, removal of platform
     data and board fixups for iMX6/7.

  ... and a few smaller changes and fixes for Samsung, OMAP, Allwinner,
  Rockchip"

* tag 'arm-soc-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (53 commits)
  MAINTAINERS: Add myself as TEE subsystem reviewer
  ixp4xx: fix spelling mistake in Kconfig "Devce" -> "Device"
  hw_random: ixp4xx: Add OF support
  hw_random: ixp4xx: Add DT bindings
  hw_random: ixp4xx: Turn into a module
  hw_random: ixp4xx: Use SPDX license tag
  hw_random: ixp4xx: enable compile-testing
  pata: ixp4xx: split platform data to its own header
  soc: ixp4xx: move cpu detection to linux/soc/ixp4xx/cpu.h
  PCI: ixp4xx: Add a new driver for IXP4xx
  PCI: ixp4xx: Add device tree bindings for IXP4xx
  ARM/ixp4xx: Make NEED_MACH_IO_H optional
  ARM/ixp4xx: Move the virtual IObases
  MAINTAINERS: ARM/MStar/Sigmastar SoCs: Add a link to the MStar tree
  ARM: debug: add UART early console support for MSTAR SoCs
  ARM: dts: ux500: Fix LED probing
  ARM: imx: add smp support for imx7d
  ARM: imx6q: drop of_platform_default_populate() from init_machine
  arm64: dts: rockchip: Update RK3399 PCI host bridge window to 32-bit address memory
  soc/tegra: fuse: Fix Tegra234-only builds
  ...
2021-07-10 09:22:44 -07:00
Linus Torvalds
71bd934101 Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton:
 "190 patches.

  Subsystems affected by this patch series: mm (hugetlb, userfaultfd,
  vmscan, kconfig, proc, z3fold, zbud, ras, mempolicy, memblock,
  migration, thp, nommu, kconfig, madvise, memory-hotplug, zswap,
  zsmalloc, zram, cleanups, kfence, and hmm), procfs, sysctl, misc,
  core-kernel, lib, lz4, checkpatch, init, kprobes, nilfs2, hfs,
  signals, exec, kcov, selftests, compress/decompress, and ipc"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (190 commits)
  ipc/util.c: use binary search for max_idx
  ipc/sem.c: use READ_ONCE()/WRITE_ONCE() for use_global_lock
  ipc: use kmalloc for msg_queue and shmid_kernel
  ipc sem: use kvmalloc for sem_undo allocation
  lib/decompressors: remove set but not used variabled 'level'
  selftests/vm/pkeys: exercise x86 XSAVE init state
  selftests/vm/pkeys: refill shadow register after implicit kernel write
  selftests/vm/pkeys: handle negative sys_pkey_alloc() return code
  selftests/vm/pkeys: fix alloc_random_pkey() to make it really, really random
  kcov: add __no_sanitize_coverage to fix noinstr for all architectures
  exec: remove checks in __register_bimfmt()
  x86: signal: don't do sas_ss_reset() until we are certain that sigframe won't be abandoned
  hfsplus: report create_date to kstat.btime
  hfsplus: remove unnecessary oom message
  nilfs2: remove redundant continue statement in a while-loop
  kprobes: remove duplicated strong free_insn_page in x86 and s390
  init: print out unknown kernel parameters
  checkpatch: do not complain about positive return values starting with EPOLL
  checkpatch: improve the indented label test
  checkpatch: scripts/spdxcheck.py now requires python3
  ...
2021-07-02 12:08:10 -07:00
Kefeng Wang
63703f37aa mm: generalize ZONE_[DMA|DMA32]
ZONE_[DMA|DMA32] configs have duplicate definitions on platforms that
subscribe to them.  Instead, just make them generic options which can be
selected on applicable platforms.

Also only x86/arm64 architectures could enable both ZONE_DMA and
ZONE_DMA32 if EXPERT, add ARCH_HAS_ZONE_DMA_SET to make dma zone
configurable and visible on the two architectures.

Link: https://lkml.kernel.org/r/20210528074557.17768-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>	[arm64]
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>	[m68k]
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>	[RISC-V]
Acked-by: Michal Simek <michal.simek@xilinx.com>	[microblaze]
Acked-by: Michael Ellerman <mpe@ellerman.id.au>		[powerpc]
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-06-30 20:47:30 -07:00
Linus Walleij
d5d9f7ac58 ARM/ixp4xx: Make NEED_MACH_IO_H optional
In order to create a proper PCI driver for the IXP4xx
we need to make the old PCI driver and its reliance
on <mach/io.h> optional.

Create a new Kconfig symbol for the legacy PCI driver
IXP4XX_PCI_LEGACY and only activate NEED_MACH_IO_H
for this driver.

A few files need to be adjusted to explicitly include
the <mach/hardware.h> and <mach/cpu.h> headers that
they previously obtained implicitly using <linux/io.h>
that would include <mach/io.h> and in turn include
these two headers.

This breaks our reliance on the old PCI and indirect
PCI support so we can reimplement a proper purely
DT-based driver in the PCI subsystem.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: Krzysztof Halasa <khalasa@piap.pl>
Cc: Zoltan HERPAI <wigyori@uid0.hu>
Cc: Raylynn Knight <rayknight@me.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2021-06-16 15:14:30 +02:00
Arnd Bergmann
2f4574dd6d clkdev: remove CONFIG_CLKDEV_LOOKUP
This option is now synonymous with CONFIG_HAVE_CLK, so use
the latter globally. Any out-of-tree platform ports that
still use a private clk_get()/clk_put() implementation should
move to CONFIG_COMMON_CLK.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-06-08 17:00:09 +02:00
Anshuman Khandual
e8003bf66a mm: drop redundant HAVE_ARCH_TRANSPARENT_HUGEPAGE
HAVE_ARCH_TRANSPARENT_HUGEPAGE has duplicate definitions on platforms
that subscribe it.  Drop these reduntant definitions and instead just
select it on applicable platforms.

Link: https://lkml.kernel.org/r/1617259448-22529-7-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Vineet Gupta <vgupta@synopsys.com>		[arc]
Cc: Russell King <linux@armlinux.org.uk>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Palmer Dabbelt <palmerdabbelt@google.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Rich Felker <dalias@libc.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-05 11:27:25 -07:00
Anshuman Khandual
855f9a8e87 mm: generalize SYS_SUPPORTS_HUGETLBFS (rename as ARCH_SUPPORTS_HUGETLBFS)
SYS_SUPPORTS_HUGETLBFS config has duplicate definitions on platforms
that subscribe it.  Instead, just make it a generic option which can be
selected on applicable platforms.

Also rename it as ARCH_SUPPORTS_HUGETLBFS instead.  This reduces code
duplication and makes it cleaner.

Link: https://lkml.kernel.org/r/1617259448-22529-3-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>	[arm64]
Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>	[riscv]
Acked-by: Michael Ellerman <mpe@ellerman.id.au>		[powerpc]
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <will@kernel.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-05 11:27:25 -07:00
Anshuman Khandual
dce4456619 mm/memtest: add ARCH_USE_MEMTEST
early_memtest() does not get called from all architectures.  Hence
enabling CONFIG_MEMTEST and providing a valid memtest=[1..N] kernel
command line option might not trigger the memory pattern tests as would be
expected in normal circumstances.  This situation is misleading.

The change here prevents the above mentioned problem after introducing a
new config option ARCH_USE_MEMTEST that should be subscribed on platforms
that call early_memtest(), in order to enable the config CONFIG_MEMTEST.
Conversely CONFIG_MEMTEST cannot be enabled on platforms where it would
not be tested anyway.

Link: https://lkml.kernel.org/r/1617269193-22294-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com> (arm64)
Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <will@kernel.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-04-30 11:20:36 -07:00
Linus Torvalds
37f00ab4a0 ARM: SoC drivers for v5.13
Updates for SoC specific drivers include a few subsystems that
 have their own maintainers but send them through the soc tree:
 
 TEE/OP-TEE:
  -  Add tracepoints around calls to secure world
 
 Memory controller drivers:
  - Minor fixes for Renesas, Exynos, Mediatek and Tegra platforms
  - Add debug statistics to Tegra20 memory controller
  - Update Tegra bindings and convert to dtschema
 
 ARM SCMI Firmware:
  - Support for modular SCMI protocols and vendor specific extensions
  - New SCMI IIO driver
  - Per-cpu DVFS
 
 The other driver changes are all from the platform maintainers
 directly and reflect the drivers that don't fit into any other
 subsystem as well as treewide changes for a particular platform.
 
 SoCFPGA:
  - Various cleanups contributed by Krzysztof Kozlowski
 
 Mediatek:
  - add MT8183 support to mutex driver
  - MMSYS: use per SoC array to describe the possible routing
  - add MMSYS support for MT8183 and MT8167
  - add support for PMIC wrapper with integrated arbiter
  - add support for MT8192/MT6873
 
 Tegra:
  - Bug fixes to PMC and clock drivers
 
 NXP/i.MX:
  - Update SCU power domain driver to keep console domain power on.
  - Add missing ADC1 power domain to SCU power domain driver.
  - Update comments for single global power domain in SCU power domain
    driver.
  - Add i.MX51/i.MX53 unique id support to i.MX SoC driver.
 
 NXP/FSL SoC driver updates for v5.13
  - Add ACPI support for RCPM driver
  - Use generic io{read,write} for QE drivers after performance optimized
    for PowerPC
  - Fix QBMAN probe to cleanup HW states correctly for kexec
  - Various cleanup and style fix for QBMAN/QE/GUTS drivers
 
 OMAP:
  - Preparation to use devicetree for genpd
  - ti-sysc needs iorange check improved when the interconnect target module
    has no control registers listed
  - ti-sysc needs to probe l4_wkup and l4_cfg interconnects first to avoid
    issues with missing resources and unnecessary deferred probe
  - ti-sysc debug option can now detect more devices
  - ti-sysc now warns if an old incomplete devicetree data is found as we
    now rely on it being complete for am3 and 4
  - soc init code needs to check for prcm and prm nodes for omap4/5 and dra7
  - omap-prm driver needs to enable autoidle retention support for omap4
  - omap5 clocks are missing gpmc and ocmc clock registers
  - pci-dra7xx now needs to use builtin_platform_driver instead of using
    builtin_platform_driver_probe for deferred probe to work
 
 Raspberry Pi:
  - Fix-up all RPi firmware drivers so as for unbind to happen in an
    orderly fashion
  - Support for RPi's PoE hat PWM bus
 
 Qualcomm
  - Improved detection for SCM calling conventions
  - Support for OEM specific wifi firmware path
  - Added drivers for SC7280/SM8350: RPMH, LLCC< AOSS QMP
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'arm-drivers-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC driver updates from Arnd Bergmann:
 "Updates for SoC specific drivers include a few subsystems that have
  their own maintainers but send them through the soc tree:

  TEE/OP-TEE:
   - Add tracepoints around calls to secure world

  Memory controller drivers:
   - Minor fixes for Renesas, Exynos, Mediatek and Tegra platforms
   - Add debug statistics to Tegra20 memory controller
   - Update Tegra bindings and convert to dtschema

  ARM SCMI Firmware:
   - Support for modular SCMI protocols and vendor specific extensions
   - New SCMI IIO driver
   - Per-cpu DVFS

  The other driver changes are all from the platform maintainers
  directly and reflect the drivers that don't fit into any other
  subsystem as well as treewide changes for a particular platform.

  SoCFPGA:
   - Various cleanups contributed by Krzysztof Kozlowski

  Mediatek:
   - add MT8183 support to mutex driver
   - MMSYS: use per SoC array to describe the possible routing
   - add MMSYS support for MT8183 and MT8167
   - add support for PMIC wrapper with integrated arbiter
   - add support for MT8192/MT6873

  Tegra:
   - Bug fixes to PMC and clock drivers

  NXP/i.MX:
   - Update SCU power domain driver to keep console domain power on.
   - Add missing ADC1 power domain to SCU power domain driver.
   - Update comments for single global power domain in SCU power domain
     driver.
   - Add i.MX51/i.MX53 unique id support to i.MX SoC driver.

  NXP/FSL SoC driver updates for v5.13
   - Add ACPI support for RCPM driver
   - Use generic io{read,write} for QE drivers after performance
     optimized for PowerPC
   - Fix QBMAN probe to cleanup HW states correctly for kexec
   - Various cleanup and style fix for QBMAN/QE/GUTS drivers

  OMAP:
   - Preparation to use devicetree for genpd
   - ti-sysc needs iorange check improved when the interconnect target
     module has no control registers listed
   - ti-sysc needs to probe l4_wkup and l4_cfg interconnects first to
     avoid issues with missing resources and unnecessary deferred probe
   - ti-sysc debug option can now detect more devices
   - ti-sysc now warns if an old incomplete devicetree data is found as
     we now rely on it being complete for am3 and 4
   - soc init code needs to check for prcm and prm nodes for omap4/5 and
     dra7
   - omap-prm driver needs to enable autoidle retention support for
     omap4
   - omap5 clocks are missing gpmc and ocmc clock registers
   - pci-dra7xx now needs to use builtin_platform_driver instead of
     using builtin_platform_driver_probe for deferred probe to work

  Raspberry Pi:
   - Fix-up all RPi firmware drivers so as for unbind to happen in an
     orderly fashion
   - Support for RPi's PoE hat PWM bus

  Qualcomm
   - Improved detection for SCM calling conventions
   - Support for OEM specific wifi firmware path
   - Added drivers for SC7280/SM8350: RPMH, LLCC< AOSS QMP"

* tag 'arm-drivers-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (165 commits)
  soc: aspeed: fix a ternary sign expansion bug
  memory: mtk-smi: Add device-link between smi-larb and smi-common
  memory: samsung: exynos5422-dmc: handle clk_set_parent() failure
  memory: renesas-rpc-if: fix possible NULL pointer dereference of resource
  clk: socfpga: fix iomem pointer cast on 64-bit
  soc: aspeed: Adapt to new LPC device tree layout
  pinctrl: aspeed-g5: Adapt to new LPC device tree layout
  ipmi: kcs: aspeed: Adapt to new LPC DTS layout
  ARM: dts: Remove LPC BMC and Host partitions
  dt-bindings: aspeed-lpc: Remove LPC partitioning
  soc: fsl: enable acpi support in RCPM driver
  soc: qcom: mdt_loader: Detect truncated read of segments
  soc: qcom: mdt_loader: Validate that p_filesz < p_memsz
  soc: qcom: pdr: Fix error return code in pdr_register_listener
  firmware: qcom_scm: Fix kernel-doc function names to match
  firmware: qcom_scm: Suppress sysfs bind attributes
  firmware: qcom_scm: Workaround lack of "is available" call on SC7180
  firmware: qcom_scm: Reduce locking section for __get_convention()
  firmware: qcom_scm: Make __qcom_scm_is_call_available() return bool
  Revert "soc: fsl: qe: introduce qe_io{read,write}* wrappers"
  ...
2021-04-26 12:11:52 -07:00
Linus Torvalds
f5ce0466dc ARM fixes for 5.12:
- Halve maximum number of CPUs if DEBUG_KMAP_LOCAL is enabled
 - Fix conversion for_each_membock() to for_each_mem_range()
 - Fix footbridge PCI mapping
 - Avoid uprobes hooking on thumb instructions
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:

 - Halve maximum number of CPUs if DEBUG_KMAP_LOCAL is enabled

 - Fix conversion for_each_membock() to for_each_mem_range()

 - Fix footbridge PCI mapping

 - Avoid uprobes hooking on thumb instructions

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 9071/1: uprobes: Don't hook on thumb instructions
  ARM: footbridge: fix PCI interrupt mapping
  ARM: 9069/1: NOMMU: Fix conversion for_each_membock() to for_each_mem_range()
  ARM: 9063/1: mm: reduce maximum number of CPUs if DEBUG_KMAP_LOCAL is enabled
2021-04-18 11:55:31 -07:00
Ard Biesheuvel
d624833f59 ARM: 9063/1: mm: reduce maximum number of CPUs if DEBUG_KMAP_LOCAL is enabled
The debugging code for kmap_local() doubles the number of per-CPU fixmap
slots allocated for kmap_local(), in order to use half of them as guard
regions. This causes the fixmap region to grow downwards beyond the start
of its reserved window if the supported number of CPUs is large, and collide
with the newly added virtual DT mapping right below it, which is obviously
not good.

One manifestation of this is EFI boot on a kernel built with NR_CPUS=32
and CONFIG_DEBUG_KMAP_LOCAL=y, which may pass the FDT in highmem, resulting
in block entries below the fixmap region that the fixmap code misidentifies
as fixmap table entries, and subsequently tries to dereference using a
phys-to-virt translation that is only valid for lowmem. This results in a
cryptic splat such as the one below.

  ftrace: allocating 45548 entries in 89 pages
  8<--- cut here ---
  Unable to handle kernel paging request at virtual address fc6006f0
  pgd = (ptrval)
  [fc6006f0] *pgd=80000040207003, *pmd=00000000
  Internal error: Oops: a06 [#1] SMP ARM
  Modules linked in:
  CPU: 0 PID: 0 Comm: swapper Not tainted 5.11.0+ #382
  Hardware name: Generic DT based system
  PC is at cpu_ca15_set_pte_ext+0x24/0x30
  LR is at __set_fixmap+0xe4/0x118
  pc : [<c041ac9c>]    lr : [<c04189d8>]    psr: 400000d3
  sp : c1601ed8  ip : 00400000  fp : 00800000
  r10: 0000071f  r9 : 00421000  r8 : 00c00000
  r7 : 00c00000  r6 : 0000071f  r5 : ffade000  r4 : 4040171f
  r3 : 00c00000  r2 : 4040171f  r1 : c041ac78  r0 : fc6006f0
  Flags: nZcv  IRQs off  FIQs off  Mode SVC_32  ISA ARM  Segment none
  Control: 30c5387d  Table: 40203000  DAC: 00000001
  Process swapper (pid: 0, stack limit = 0x(ptrval))

So let's limit CONFIG_NR_CPUS to 16 when CONFIG_DEBUG_KMAP_LOCAL=y. Also,
fix the BUILD_BUG_ON() check that was supposed to catch this, by checking
whether the region grows below the start address rather than above the end
address.

Fixes: 2a15ba82fa ("ARM: highmem: Switch to generic kmap atomic")
Reported-by: Peter Robinson <pbrobinson@gmail.com>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2021-03-25 10:25:19 +00:00
Krzysztof Kozlowski
910499e133 ARM: socfpga: introduce common ARCH_INTEL_SOCFPGA
Simplify 32-bit and 64-bit Intel SoCFPGA Kconfig options by having only
one for both of them.  This the common practice for other platforms.
Additionally, the ARCH_SOCFPGA is too generic as SoCFPGA designs come
from multiple vendors.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
2021-03-23 11:03:35 -05:00
Marc Zyngier
3e895f4cbd ARM: ep93xx: Select GENERIC_IRQ_MULTI_HANDLER directly
ep93xx currently relies of CONFIG_ARM_VIC to select
GENERIC_IRQ_MULTI_HANDLER. Given that this is logically a platform
architecture property, add the selection of GENERIC_IRQ_MULTI_HANDLER
at the platform level.

Further patches will remove the selection from the irqchip side.

Reported-by: Marc Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Hector Martin <marcan@marcan.st>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
2021-03-08 20:18:32 +00:00
Linus Torvalds
6ff6f86bc4 ARM updates for 5.12-rc1:
- Generalise byte swapping assembly
 - Update debug addresses for STI
 - Validate start of physical memory with DTB
 - Do not clear SCTLR.nTLSMD in decompressor
 - amba/locomo/sa1111 devices remove method return type is void
 - address markers for KASAN in page table dump
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM updates from Russell King:

 - Generalise byte swapping assembly

 - Update debug addresses for STI

 - Validate start of physical memory with DTB

 - Do not clear SCTLR.nTLSMD in decompressor

 - amba/locomo/sa1111 devices remove method return type is void

 - address markers for KASAN in page table dump

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 9065/1: OABI compat: fix build when EPOLL is not enabled
  ARM: 9055/1: mailbox: arm_mhuv2: make remove callback return void
  amba: Make use of bus_type functions
  amba: Make the remove callback return void
  vfio: platform: simplify device removal
  amba: reorder functions
  amba: Fix resource leak for drivers without .remove
  ARM: 9054/1: arch/arm/mm/mmu.c: Remove duplicate header
  ARM: 9053/1: arm/mm/ptdump:Add address markers for KASAN regions
  ARM: 9051/1: vdso: remove unneded extra-y addition
  ARM: 9050/1: Kconfig: Select ARCH_HAVE_NMI_SAFE_CMPXCHG where possible
  ARM: 9049/1: locomo: make locomo bus's remove callback return void
  ARM: 9048/1: sa1111: make sa1111 bus's remove callback return void
  ARM: 9047/1: smp: remove unused variable
  ARM: 9046/1: decompressor: Do not clear SCTLR.nTLSMD for ARMv7+ cores
  ARM: 9045/1: uncompress: Validate start of physical memory against passed DTB
  ARM: 9042/1: debug: no uncompress debugging while semihosting
  ARM: 9041/1: sti LL_UART: add STiH418 SBC UART0 support
  ARM: 9040/1: use DEBUG_UART_PHYS and DEBUG_UART_VIRT for sti LL_UART
  ARM: 9039/1: assembler: generalize byte swapping macro into rev_l
2021-02-22 14:27:07 -08:00
Linus Torvalds
24880bef41 Remove oprofile and dcookies support
The "oprofile" user-space tools don't use the kernel OPROFILE support any more,
 and haven't in a long time. User-space has been converted to the perf
 interfaces.
 
 The dcookies stuff is only used by the oprofile code. Now that oprofile's
 support is getting removed from the kernel, there is no need for dcookies as
 well.
 
 Remove kernel's old oprofile and dcookies support.
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Merge tag 'oprofile-removal-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux

Pull oprofile and dcookies removal from Viresh Kumar:
 "Remove oprofile and dcookies support

  The 'oprofile' user-space tools don't use the kernel OPROFILE support
  any more, and haven't in a long time. User-space has been converted to
  the perf interfaces.

  The dcookies stuff is only used by the oprofile code. Now that
  oprofile's support is getting removed from the kernel, there is no
  need for dcookies as well.

  Remove kernel's old oprofile and dcookies support"

* tag 'oprofile-removal-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux:
  fs: Remove dcookies support
  drivers: Remove CONFIG_OPROFILE support
  arch: xtensa: Remove CONFIG_OPROFILE support
  arch: x86: Remove CONFIG_OPROFILE support
  arch: sparc: Remove CONFIG_OPROFILE support
  arch: sh: Remove CONFIG_OPROFILE support
  arch: s390: Remove CONFIG_OPROFILE support
  arch: powerpc: Remove oprofile
  arch: powerpc: Stop building and using oprofile
  arch: parisc: Remove CONFIG_OPROFILE support
  arch: mips: Remove CONFIG_OPROFILE support
  arch: microblaze: Remove CONFIG_OPROFILE support
  arch: ia64: Remove rest of perfmon support
  arch: ia64: Remove CONFIG_OPROFILE support
  arch: hexagon: Don't select HAVE_OPROFILE
  arch: arc: Remove CONFIG_OPROFILE support
  arch: arm: Remove CONFIG_OPROFILE support
  arch: alpha: Remove CONFIG_OPROFILE support
2021-02-21 10:40:34 -08:00
Daniel Thompson
9aaf9bb794 ARM: 9050/1: Kconfig: Select ARCH_HAVE_NMI_SAFE_CMPXCHG where possible
Currently ARCH_HAVE_NMI_SAFE_CMPXCHG is not set on Arm systems and this
makes it impossible to enable features such as ftrace histogram triggers
on Arm platforms.

Most Arm systems are NMI safe simply because there is no NMI but this isn't
universally true meaning we cannot set ARCH_HAVE_NMI_SAFE_CMPXCHG for all
Arm devices. However the load/store exclusive implementation of cmpxchg is
NMI-safe and this implementation is used ARMv6k and later. Let's select
ARCH_HAVE_NMI_SAFE_CMPXCHG for these systems.

Note that ARMv6 uses load/store exclusive for 32-bit cmpxchg but relies on
interrupt masking for 8- and 16-bit operations. This patch is conservative
and does not change behaviour for CPU_V6.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2021-02-01 19:47:59 +00:00
Geert Uytterhoeven
0673cb3895 ARM: 9045/1: uncompress: Validate start of physical memory against passed DTB
Currently, the start address of physical memory is obtained by masking
the program counter with a fixed mask of 0xf8000000.  This mask value
was chosen as a balance between the requirements of different platforms.
However, this does require that the start address of physical memory is
a multiple of 128 MiB, precluding booting Linux on platforms where this
requirement is not fulfilled.

Fix this limitation by validating the masked address against the memory
information in the passed DTB.  Only use the start address
from DTB when masking would yield an out-of-range address, prefer the
traditional method in all other cases.  Note that this applies only to the
explicitly passed DTB on modern systems, and not to a DTB appended to
the kernel, or to ATAGS.  The appended DTB may need to be augmented by
information from ATAGS, which may need to rely on knowledge of the start
address of physical memory itself.

This allows to boot Linux on r7s9210/rza2mevb using the 64 MiB of SDRAM
on the RZA2MEVB sub board, which is located at 0x0C000000 (CS3 space),
i.e. not at a multiple of 128 MiB.

Suggested-by: Nicolas Pitre <nico@fluxnic.net>
Suggested-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2021-02-01 19:42:13 +00:00
Viresh Kumar
d50b870b27 arch: arm: Remove CONFIG_OPROFILE support
The "oprofile" user-space tools don't use the kernel OPROFILE support
any more, and haven't in a long time. User-space has been converted to
the perf interfaces.

Remove the old oprofile's architecture specific support.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Robert Richter <rric@kernel.org>
Acked-by: William Cohen <wcohen@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
2021-01-22 12:11:54 +05:30
Arnd Bergmann
ce1380c9f4 ARM: remove u300 platform
The Ericsson U300 platform was one of two ARM929 based SoC platforms for
mobile phones in ST-Ericsson after the merger of Ericsson with ST-NXP
into ST-Ericsson, the other one being the ST Nomadik.

The platform was not widely adopted in Linux based systems and was
replaced with the far superior ST-Ericsson U8500 in 2011, but Linus
Walleij kept maintaining the code for the whole time.

Linus continues to use the Nomadik machine, but decided to drop
u300 from the kernel as part of this year's spring cleaning.
Thanks for having maintained it all these years.

Cc: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/lkml/CACRpkdbJkiHR9FSfJTH_5d_qRU1__dRXHM1TL40iqNRKbGQfrQ@mail.gmail.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-01-20 11:42:23 +01:00
Arnd Bergmann
edd4488aea ARM: remove tango platform
The smp8758 (tango4) SoC was the last generation of set-top-box chips
to come out of Sigma Designs, and support was added by Marc Gonzalez
and Måns Rullgård between 2015 and 2017, before the company went out of
business and the products were abandoned.

The chip is used in some set-top-boxes such as the Popcorn Hour A-500,
which could have seen some adoption by hobbyists. This has not happened
in the past four years, and support for the more widely used MIPS based
SoCs was never merged at all.

Thanks to Marc and Måns for maintaining for the past years even after the
death of the platform.

Cc: Marc Gonzalez <marc.w.gonzalez@free.fr>
Cc: Mans Rullgard <mans@mansr.com>
Link: https://lore.kernel.org/lkml/2d643ebc-09af-a809-eb3f-2aec8ecee501@free.fr/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-01-20 11:02:34 +01:00
Arnd Bergmann
89d4f98ae9 ARM: remove zte zx platform
The ZTE ZX set-top-box SoC platform was added in 2015 by Jun Nie, with
Baoyou Xie and Shawn Guo subsequently becoming maintainers after the
addition of the 64-bit variant.

However, the only machines that were ever supported upstream are the
reference designs, not actual set-top-box devices that would benefit
from this support. All ZTE set-top-boxes from the past few years seem
to be based on third-party SoCs. While there is very little information
about zx296702 and zx296718 on the web, I found some references to other
chips from the same family, such as zx296716 and zx296719, which were
never submitted for upstream support. Finally, there is no support for
the GPU on either of them, with the lima and panfrost device drivers
having been added after work on the zx platform had stopped.

Shawn confirmed that he has not seen any interest in this platform for
the past four years, and that it can be removed.

Thanks to Jun and Shawn for maintaining this platform over the past
five years.

Cc: Jun Nie <jun.nie@linaro.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-01-20 10:24:19 +01:00
Arnd Bergmann
f3a732843a ARM: remove sirf prima2/atlas platforms
The SiRF Prima2 and Atlas platform code was contributed by Cambridge
Silicon Radio (CSR) after aquiring the original SiRF company, and
maintained by Barry Song. CSR was subsequently acquired by Qualcomm,
who no longer have an interest in maintaining the SoC platform but
instead have released more recent SoCs for the same market in the
Snapdragon family.

As Barry is no longer working for the company, nobody else there
wants to maintain it, and there are no third-party users, the
best way forward seems to be to completely remove it.

Thanks to Barry for maintaining the platform for the past ten years.

Cc: Barry Song <baohua@kernel.org>
Link: https://lore.kernel.org/lkml/c969392572604b98bcb3be44048c3165@hisilicon.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-01-20 09:41:37 +01:00
Uwe Kleine-König
cc6111375c ARM: drop efm32 platform
I didn't touch this code since it served as a platform to introduce
ARMv7-M support to Linux. The only known machine that runs Linux has only
4 MiB of RAM (that originally only exists to hold the display's framebuffer).

There are no known users and no further use foreseeable, so drop the
code.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20210115155130.185010-2-u.kleine-koenig@pengutronix.de'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-01-15 17:42:10 +01:00
Rob Herring
665a8799b0 ARM: Remove PicoXcell platform support
PicoXcell has had nothing but treewide cleanups for at least the last 8
years and no signs of activity. The most recent activity is a yocto vendor
kernel based on v3.0 in 2015.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Jamie Iles <jamie@jamieiles.com>
Cc: Russell King <linux@armlinux.org.uk>
Link: https://lore.kernel.org/r/20201210200315.2965567-3-robh@kernel.org'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-01-08 16:35:53 +01:00
Linus Torvalds
c45647f9f5 ARM updates for 5.11:
- Rework phys/virt translation
 - Add KASan support
 - Move DT out of linear map region
 - Use more PC-relative addressing in assembly
 - Remove FP emulation handling while in kernel mode
 - Link with '-z norelro'
 - remove old check for GCC <= 4.2 in ARM unwinder code
 - disable big endian if using clang's linker
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux

Pull ARM updates from Russell King:

 - Rework phys/virt translation

 - Add KASan support

 - Move DT out of linear map region

 - Use more PC-relative addressing in assembly

 - Remove FP emulation handling while in kernel mode

 - Link with '-z norelro'

 - remove old check for GCC <= 4.2 in ARM unwinder code

 - disable big endian if using clang's linker

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (46 commits)
  ARM: 9027/1: head.S: explicitly map DT even if it lives in the first physical section
  ARM: 9038/1: Link with '-z norelro'
  ARM: 9037/1: uncompress: Add OF_DT_MAGIC macro
  ARM: 9036/1: uncompress: Fix dbgadtb size parameter name
  ARM: 9035/1: uncompress: Add be32tocpu macro
  ARM: 9033/1: arm/smp: Drop the macro S(x,s)
  ARM: 9032/1: arm/mm: Convert PUD level pgtable helper macros into functions
  ARM: 9031/1: hyp-stub: remove unused .L__boot_cpu_mode_offset symbol
  ARM: 9044/1: vfp: use undef hook for VFP support detection
  ARM: 9034/1: __div64_32(): straighten up inline asm constraints
  ARM: 9030/1: entry: omit FP emulation for UND exceptions taken in kernel mode
  ARM: 9029/1: Make iwmmxt.S support Clang's integrated assembler
  ARM: 9028/1: disable KASAN in call stack capturing routines
  ARM: 9026/1: unwind: remove old check for GCC <= 4.2
  ARM: 9025/1: Kconfig: CPU_BIG_ENDIAN depends on !LD_IS_LLD
  ARM: 9024/1: Drop useless cast of "u64" to "long long"
  ARM: 9023/1: Spelling s/mmeory/memory/
  ARM: 9022/1: Change arch/arm/lib/mem*.S to use WEAK instead of .weak
  ARM: kvm: replace open coded VA->PA calculations with adr_l call
  ARM: head.S: use PC relative insn sequence to calculate PHYS_OFFSET
  ...
2020-12-22 13:34:27 -08:00
Russell King
ecbbb88727 Merge branch 'devel-stable' into for-next 2020-12-21 11:19:26 +00:00
Linus Torvalds
e2ae634014 RISC-V Patches for the 5.11 Merge Window, Part 1
We have a handful of new kernel features for 5.11:
 
 * Support for the contiguous memory allocator.
 * Support for IRQ Time Accounting
 * Support for stack tracing
 * Support for strict /dev/mem
 * Support for kernel section protection
 
 I'm being a bit conservative on the cutoff for this round due to the
 timing, so this is all the new development I'm going to take for this
 cycle (even if some of it probably normally would have been OK).  There
 are, however, some fixes on the list that I will likely be sending along
 either later this week or early next week.
 
 There is one issue in here: one of my test configurations
 (PREEMPT{,_DEBUG}=y) fails to boot on QEMU 5.0.0 (from April) as of the
 .text.init alignment patch.  With any luck we'll sort out the issue, but
 given how many bugs get fixed all over the place and how unrelated those
 features seem my guess is that we're just running into something that's
 been lurking for a while and has already been fixed in the newer QEMU
 (though I wouldn't be surprised if it's one of these implicit
 assumptions we have in the boot flow).  If it was hardware I'd be
 strongly inclined to look more closely, but given that users can upgrade
 their simulators I'm less worried about it.
 
 There are two merge conflicts, both in build files.  They're both a bit
 clunky: arch/riscv/Kconfig is out of order (I have a script that's
 supposed to keep them in order, I'll fix it) and lib/Makefile is out of
 order (though GENERIC_LIB here doesn't mean quite what it does above).
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Merge tag 'riscv-for-linus-5.11-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V updates from Palmer Dabbelt:
 "We have a handful of new kernel features for 5.11:

   - Support for the contiguous memory allocator.

   - Support for IRQ Time Accounting

   - Support for stack tracing

   - Support for strict /dev/mem

   - Support for kernel section protection

  I'm being a bit conservative on the cutoff for this round due to the
  timing, so this is all the new development I'm going to take for this
  cycle (even if some of it probably normally would have been OK). There
  are, however, some fixes on the list that I will likely be sending
  along either later this week or early next week.

  There is one issue in here: one of my test configurations
  (PREEMPT{,_DEBUG}=y) fails to boot on QEMU 5.0.0 (from April) as of
  the .text.init alignment patch.

  With any luck we'll sort out the issue, but given how many bugs get
  fixed all over the place and how unrelated those features seem my
  guess is that we're just running into something that's been lurking
  for a while and has already been fixed in the newer QEMU (though I
  wouldn't be surprised if it's one of these implicit assumptions we
  have in the boot flow). If it was hardware I'd be strongly inclined to
  look more closely, but given that users can upgrade their simulators
  I'm less worried about it"

* tag 'riscv-for-linus-5.11-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  arm64: Use the generic devmem_is_allowed()
  arm: Use the generic devmem_is_allowed()
  RISC-V: Use the new generic devmem_is_allowed()
  lib: Add a generic version of devmem_is_allowed()
  riscv: Fixed kernel test robot warning
  riscv: kernel: Drop unused clean rule
  riscv: provide memmove implementation
  RISC-V: Move dynamic relocation section under __init
  RISC-V: Protect all kernel sections including init early
  RISC-V: Align the .init.text section
  RISC-V: Initialize SBI early
  riscv: Enable ARCH_STACKWALK
  riscv: Make stack walk callback consistent with generic code
  riscv: Cleanup stacktrace
  riscv: Add HAVE_IRQ_TIME_ACCOUNTING
  riscv: Enable CMA support
  riscv: Ignore Image.* and loader.bin
  riscv: Clean up boot dir
  riscv: Fix compressed Image formats build
  RISC-V: Add kernel image sections to the resource tree
2020-12-18 10:43:07 -08:00
Linus Torvalds
7a932e5702 asm-generic: cross-architecture timer cleanup
This cleans up two ancient timer features that were never completed in
 the past, CONFIG_GENERIC_CLOCKEVENTS and CONFIG_ARCH_USES_GETTIMEOFFSET.
 
 There was only one user left for the ARCH_USES_GETTIMEOFFSET variant
 of clocksource implementations, the ARM EBSA110 platform. Rather than
 changing to use modern timekeeping, we remove the platform entirely as
 Russell no longer uses his machine and nobody else seems to have one
 any more.
 
 The conditional code for using arch_gettimeoffset() is removed as
 a result.
 
 For CONFIG_GENERIC_CLOCKEVENTS, there are still a couple of platforms
 not using clockevent drivers: parisc, ia64, most of m68k, and one
 Arm platform. These all do timer ticks slighly differently, and this
 gets cleaned up to the point they at least all call the same helper
 function. Instead of most platforms using 'select GENERIC_CLOCKEVENTS'
 in Kconfig, the polarity is now reversed, with the few remaining ones
 selecting LEGACY_TIMER_TICK instead.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'asm-generic-timers-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic cross-architecture timer cleanup from Arnd Bergmann:
 "This cleans up two ancient timer features that were never completed in
  the past, CONFIG_GENERIC_CLOCKEVENTS and CONFIG_ARCH_USES_GETTIMEOFFSET.

  There was only one user left for the ARCH_USES_GETTIMEOFFSET variant
  of clocksource implementations, the ARM EBSA110 platform. Rather than
  changing to use modern timekeeping, we remove the platform entirely as
  Russell no longer uses his machine and nobody else seems to have one
  any more.

  The conditional code for using arch_gettimeoffset() is removed as a
  result.

  For CONFIG_GENERIC_CLOCKEVENTS, there are still a couple of platforms
  not using clockevent drivers: parisc, ia64, most of m68k, and one Arm
  platform. These all do timer ticks slighly differently, and this gets
  cleaned up to the point they at least all call the same helper
  function.

  Instead of most platforms using 'select GENERIC_CLOCKEVENTS' in
  Kconfig, the polarity is now reversed, with the few remaining ones
  selecting LEGACY_TIMER_TICK instead"

* tag 'asm-generic-timers-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  timekeeping: default GENERIC_CLOCKEVENTS to enabled
  timekeeping: remove xtime_update
  m68k: remove timer_interrupt() function
  m68k: change remaining timers to legacy_timer_tick
  m68k: m68328: use legacy_timer_tick()
  m68k: sun3/sun3c: use legacy_timer_tick
  m68k: split heartbeat out of timer function
  m68k: coldfire: use legacy_timer_tick()
  parisc: use legacy_timer_tick
  ARM: rpc: use legacy_timer_tick
  ia64: convert to legacy_timer_tick
  timekeeping: add CONFIG_LEGACY_TIMER_TICK
  timekeeping: remove arch_gettimeoffset
  net: remove am79c961a driver
  ARM: remove ebsa110 platform
2020-12-16 00:07:17 -08:00
Linus Torvalds
ac73e3dc8a Merge branch 'akpm' (patches from Andrew)
Merge misc updates from Andrew Morton:

 - a few random little subsystems

 - almost all of the MM patches which are staged ahead of linux-next
   material. I'll trickle to post-linux-next work in as the dependents
   get merged up.

Subsystems affected by this patch series: kthread, kbuild, ide, ntfs,
ocfs2, arch, and mm (slab-generic, slab, slub, dax, debug, pagecache,
gup, swap, shmem, memcg, pagemap, mremap, hmm, vmalloc, documentation,
kasan, pagealloc, memory-failure, hugetlb, vmscan, z3fold, compaction,
oom-kill, migration, cma, page-poison, userfaultfd, zswap, zsmalloc,
uaccess, zram, and cleanups).

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (200 commits)
  mm: cleanup kstrto*() usage
  mm: fix fall-through warnings for Clang
  mm: slub: convert sysfs sprintf family to sysfs_emit/sysfs_emit_at
  mm: shmem: convert shmem_enabled_show to use sysfs_emit_at
  mm:backing-dev: use sysfs_emit in macro defining functions
  mm: huge_memory: convert remaining use of sprintf to sysfs_emit and neatening
  mm: use sysfs_emit for struct kobject * uses
  mm: fix kernel-doc markups
  zram: break the strict dependency from lzo
  zram: add stat to gather incompressible pages since zram set up
  zram: support page writeback
  mm/process_vm_access: remove redundant initialization of iov_r
  mm/zsmalloc.c: rework the list_add code in insert_zspage()
  mm/zswap: move to use crypto_acomp API for hardware acceleration
  mm/zswap: fix passing zero to 'PTR_ERR' warning
  mm/zswap: make struct kernel_param_ops definitions const
  userfaultfd/selftests: hint the test runner on required privilege
  userfaultfd/selftests: fix retval check for userfaultfd_open()
  userfaultfd/selftests: always dump something in modes
  userfaultfd: selftests: make __{s,u}64 format specifiers portable
  ...
2020-12-15 12:53:37 -08:00
Mike Rapoport
4f5b0c1789 arm, arm64: move free_unused_memmap() to generic mm
ARM and ARM64 free unused parts of the memory map just before the
initialization of the page allocator. To allow holes in the memory map both
architectures overload pfn_valid() and define HAVE_ARCH_PFN_VALID.

Allowing holes in the memory map for FLATMEM may be useful for small
machines, such as ARC and m68k and will enable those architectures to cease
using DISCONTIGMEM and still support more than one memory bank.

Move the functions that free unused memory map to generic mm and enable
them in case HAVE_ARCH_PFN_VALID=y.

Link: https://lkml.kernel.org/r/20201101170454.9567-10-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>	[arm64]
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Meelis Roos <mroos@linux.ee>
Cc: Michael Schmitz <schmitzmic@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15 12:13:42 -08:00
Mike Rapoport
5e545df329 arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
ARM is the only architecture that defines CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
which in turn enables memmap_valid_within() function that is intended to
verify existence  of struct page associated with a pfn when there are holes
in the memory map.

However, the ARCH_HAS_HOLES_MEMORYMODEL also enables HAVE_ARCH_PFN_VALID
and arch-specific pfn_valid() implementation that also deals with the holes
in the memory map.

The only two users of memmap_valid_within() call this function after
a call to pfn_valid() so the memmap_valid_within() check becomes redundant.

Remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL and memmap_valid_within() and rely
entirely on ARM's implementation of pfn_valid() that is now enabled
unconditionally.

Link: https://lkml.kernel.org/r/20201101170454.9567-9-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Meelis Roos <mroos@linux.ee>
Cc: Michael Schmitz <schmitzmic@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15 12:13:42 -08:00
Linus Torvalds
edd7ab7684 The new preemtible kmap_local() implementation:
- Consolidate all kmap_atomic() internals into a generic implementation
     which builds the base for the kmap_local() API and make the
     kmap_atomic() interface wrappers which handle the disabling/enabling of
     preemption and pagefaults.
 
   - Switch the storage from per-CPU to per task and provide scheduler
     support for clearing mapping when scheduling out and restoring them
     when scheduling back in.
 
   - Merge the migrate_disable/enable() code, which is also part of the
     scheduler pull request. This was required to make the kmap_local()
     interface available which does not disable preemption when a mapping
     is established. It has to disable migration instead to guarantee that
     the virtual address of the mapped slot is the same accross preemption.
 
   - Provide better debug facilities: guard pages and enforced utilization
     of the mapping mechanics on 64bit systems when the architecture allows
     it.
 
   - Provide the new kmap_local() API which can now be used to cleanup the
     kmap_atomic() usage sites all over the place. Most of the usage sites
     do not require the implicit disabling of preemption and pagefaults so
     the penalty on 64bit and 32bit non-highmem systems is removed and quite
     some of the code can be simplified. A wholesale conversion is not
     possible because some usage depends on the implicit side effects and
     some need to be cleaned up because they work around these side effects.
 
     The migrate disable side effect is only effective on highmem systems
     and when enforced debugging is enabled. On 64bit and 32bit non-highmem
     systems the overhead is completely avoided.
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Merge tag 'core-mm-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull kmap updates from Thomas Gleixner:
 "The new preemtible kmap_local() implementation:

   - Consolidate all kmap_atomic() internals into a generic
     implementation which builds the base for the kmap_local() API and
     make the kmap_atomic() interface wrappers which handle the
     disabling/enabling of preemption and pagefaults.

   - Switch the storage from per-CPU to per task and provide scheduler
     support for clearing mapping when scheduling out and restoring them
     when scheduling back in.

   - Merge the migrate_disable/enable() code, which is also part of the
     scheduler pull request. This was required to make the kmap_local()
     interface available which does not disable preemption when a
     mapping is established. It has to disable migration instead to
     guarantee that the virtual address of the mapped slot is the same
     across preemption.

   - Provide better debug facilities: guard pages and enforced
     utilization of the mapping mechanics on 64bit systems when the
     architecture allows it.

   - Provide the new kmap_local() API which can now be used to cleanup
     the kmap_atomic() usage sites all over the place. Most of the usage
     sites do not require the implicit disabling of preemption and
     pagefaults so the penalty on 64bit and 32bit non-highmem systems is
     removed and quite some of the code can be simplified. A wholesale
     conversion is not possible because some usage depends on the
     implicit side effects and some need to be cleaned up because they
     work around these side effects.

     The migrate disable side effect is only effective on highmem
     systems and when enforced debugging is enabled. On 64bit and 32bit
     non-highmem systems the overhead is completely avoided"

* tag 'core-mm-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
  ARM: highmem: Fix cache_is_vivt() reference
  x86/crashdump/32: Simplify copy_oldmem_page()
  io-mapping: Provide iomap_local variant
  mm/highmem: Provide kmap_local*
  sched: highmem: Store local kmaps in task struct
  x86: Support kmap_local() forced debugging
  mm/highmem: Provide CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP
  mm/highmem: Provide and use CONFIG_DEBUG_KMAP_LOCAL
  microblaze/mm/highmem: Add dropped #ifdef back
  xtensa/mm/highmem: Make generic kmap_atomic() work correctly
  mm/highmem: Take kmap_high_get() properly into account
  highmem: High implementation details and document API
  Documentation/io-mapping: Remove outdated blurb
  io-mapping: Cleanup atomic iomap
  mm/highmem: Remove the old kmap_atomic cruft
  highmem: Get rid of kmap_types.h
  xtensa/mm/highmem: Switch to generic kmap atomic
  sparc/mm/highmem: Switch to generic kmap atomic
  powerpc/mm/highmem: Switch to generic kmap atomic
  nds32/mm/highmem: Switch to generic kmap atomic
  ...
2020-12-14 18:35:53 -08:00
Palmer Dabbelt
7d95a88f92
Add and use a generic version of devmem_is_allowed()
As part of adding STRICT_DEVMEM support to the RISC-V port, Zong provided an
implementation of devmem_is_allowed() that's exactly the same as the version in
a handful of other ports.  Rather than duplicate code, I've put a generic
version of this in lib/ and used it for the RISC-V port.

* palmer/generic-devmem:
  arm64: Use the generic devmem_is_allowed()
  arm: Use the generic devmem_is_allowed()
  RISC-V: Use the new generic devmem_is_allowed()
  lib: Add a generic version of devmem_is_allowed()
2020-12-11 12:30:26 -08:00
Palmer Dabbelt
914ee96654
arm: Use the generic devmem_is_allowed()
This is exactly the same as the arm64 version, which I recently copied
into lib/ for use by the RISC-V port.

Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-12-11 12:28:24 -08:00
Nathan Chancellor
59612b24f7 kbuild: Hoist '--orphan-handling' into Kconfig
Currently, '--orphan-handling=warn' is spread out across four different
architectures in their respective Makefiles, which makes it a little
unruly to deal with in case it needs to be disabled for a specific
linker version (in this case, ld.lld 10.0.1).

To make it easier to control this, hoist this warning into Kconfig and
the main Makefile so that disabling it is simpler, as the warning will
only be enabled in a couple places (main Makefile and a couple of
compressed boot folders that blow away LDFLAGS_vmlinx) and making it
conditional is easier due to Kconfig syntax. One small additional
benefit of this is saving a call to ld-option on incremental builds
because we will have already evaluated it for CONFIG_LD_ORPHAN_WARN.

To keep the list of supported architectures the same, introduce
CONFIG_ARCH_WANT_LD_ORPHAN_WARN, which an architecture can select to
gain this automatically after all of the sections are specified and size
asserted. A special thanks to Kees Cook for the help text on this
config.

Link: https://github.com/ClangBuiltLinux/linux/issues/1187
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-12-01 22:45:36 +09:00