- Switch the MSI decriptor locking to lock guards
- Replace a broken and naive implementation of PCI/MSI-X control word
updates in the PCI/TPH driver with a properly serialized variant in the
PCI/MSI core code.
- Remove the MSI descriptor abuse in the SCCI/UFS/QCOM driver by
replacing the direct access to the MSI descriptors with the proper API
function calls. People will never understand that APIs exist for a
reason...
- Provide core infrastructre for the upcoming PCI endpoint library
extensions. Currently limited to ARM GICv3+, but in theory extensible
to other architectures.
- Provide a MSI domain::teardown() callback, which allows drivers to undo
the effects of the prepare() callback.
- Move the MSI domain::prepare() callback invocation to domain creation
time to avoid redundant (and in case of ARM/GIC-V3-ITS confusing)
invocations on every allocation.
In combination with the new teardown callback this removes some ugly
hacks in the GIC-V3-ITS driver, which pretended to work around the
short comings of the core code so far. With this update the code is
correct by design and implementation.
- Make the irqchip MSI library globally available, provide a MSI parent
domain creation helper and convert a bunch of (PCI/)MSI drivers over to
the modern MSI parent mechanism. This is the first step to get rid of
at least one incarnation of the three PCI/MSI management schemes.
- The usual small cleanups and improvements
-----BEGIN PGP SIGNATURE-----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=OBMj
-----END PGP SIGNATURE-----
Merge tag 'irq-msi-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull MSI updates from Thomas Gleixner:
"Updates for the MSI subsystem (core code and PCI):
- Switch the MSI descriptor locking to lock guards
- Replace a broken and naive implementation of PCI/MSI-X control word
updates in the PCI/TPH driver with a properly serialized variant in
the PCI/MSI core code.
- Remove the MSI descriptor abuse in the SCCI/UFS/QCOM driver by
replacing the direct access to the MSI descriptors with the proper
API function calls. People will never understand that APIs exist
for a reason...
- Provide core infrastructre for the upcoming PCI endpoint library
extensions. Currently limited to ARM GICv3+, but in theory
extensible to other architectures.
- Provide a MSI domain::teardown() callback, which allows drivers to
undo the effects of the prepare() callback.
- Move the MSI domain::prepare() callback invocation to domain
creation time to avoid redundant (and in case of ARM/GIC-V3-ITS
confusing) invocations on every allocation.
In combination with the new teardown callback this removes some
ugly hacks in the GIC-V3-ITS driver, which pretended to work around
the short comings of the core code so far. With this update the
code is correct by design and implementation.
- Make the irqchip MSI library globally available, provide a MSI
parent domain creation helper and convert a bunch of (PCI/)MSI
drivers over to the modern MSI parent mechanism. This is the first
step to get rid of at least one incarnation of the three PCI/MSI
management schemes.
- The usual small cleanups and improvements"
* tag 'irq-msi-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
PCI/MSI: Use bool for MSI enable state tracking
PCI: tegra: Convert to MSI parent infrastructure
PCI: xgene: Convert to MSI parent infrastructure
PCI: apple: Convert to MSI parent infrastructure
irqchip/msi-lib: Honour the MSI_FLAG_NO_AFFINITY flag
irqchip/mvebu: Convert to msi_create_parent_irq_domain() helper
irqchip/gic: Convert to msi_create_parent_irq_domain() helper
genirq/msi: Add helper for creating MSI-parent irq domains
irqchip: Make irq-msi-lib.h globally available
irqchip/gic-v3-its: Use allocation size from the prepare call
genirq/msi: Engage the .msi_teardown() callback on domain removal
genirq/msi: Move prepare() call to per-device allocation
irqchip/gic-v3-its: Implement .msi_teardown() callback
genirq/msi: Add .msi_teardown() callback as the reverse of .msi_prepare()
irqchip/gic-v3-its: Add support for device tree msi-map and msi-mask
dt-bindings: PCI: pci-ep: Add support for iommu-map and msi-map
irqchip/gic-v3-its: Set IRQ_DOMAIN_FLAG_MSI_IMMUTABLE for ITS
irqdomain: Add IRQ_DOMAIN_FLAG_MSI_IMMUTABLE and irq_domain_is_msi_immutable()
platform-msi: Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all()
genirq/msi: Rename msi_[un]lock_descs()
...
- Convert the generic interrupt chip to lock guards to remove copy &
pasta boilerplate code and gotos.
- A new driver fot the interrupt controller in the EcoNet EN751221 MIPS SoC.
- Extend the SG2042-MSI driver to support the new SG2044 SoC
- Updates and cleanups for the (ancient) VT8500 driver
- Improve the scalability of the ARM GICV4.1 ITS driver by utilizing node
local copies a VM's interrupt translation table when possible. This
results in a 12% reduction of VM IPI latency in certain workloads.
- The usual cleanups and improvements all over the place
-----BEGIN PGP SIGNATURE-----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=OS2H
-----END PGP SIGNATURE-----
Merge tag 'irq-drivers-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq controller updates from Thomas Gleixner:
"Update for interrupt chip drivers:
- Convert the generic interrupt chip to lock guards to remove copy &
pasta boilerplate code and gotos.
- A new driver fot the interrupt controller in the EcoNet EN751221
MIPS SoC.
- Extend the SG2042-MSI driver to support the new SG2044 SoC
- Updates and cleanups for the (ancient) VT8500 driver
- Improve the scalability of the ARM GICV4.1 ITS driver by utilizing
node local copies a VM's interrupt translation table when possible.
This results in a 12% reduction of VM IPI latency in certain
workloads.
- The usual cleanups and improvements all over the place"
* tag 'irq-drivers-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (25 commits)
irqchip/irq-pruss-intc: Simplify chained interrupt handler setup
irqchip/gic-v4.1: Use local 4_1 ITS to generate VSGI
irqchip/econet-en751221: Switch to of_fwnode_handle()
irqchip/irq-vt8500: Switch to irq_domain_create_*()
irqchip/econet-en751221: Switch to irq_domain_create_linear()
irqchip/irq-vt8500: Use fewer global variables and add error handling
irqchip/irq-vt8500: Use a dedicated chained handler function
irqchip/irq-vt8500: Don't require 8 interrupts from a chained controller
irqchip/irq-vt8500: Drop redundant copy of the device node pointer
irqchip/irq-vt8500: Split up ack/mask functions
irqchip/sg2042-msi: Fix wrong type cast in sg2044_msi_irq_ack()
irqchip/sg2042-msi: Add the Sophgo SG2044 MSI interrupt controller
irqchip/sg2042-msi: Introduce configurable chipinfo for SG2042
irqchip/sg2042-msi: Rename functions and data structures to be SG2042 agnostic
dt-bindings: interrupt-controller: Add Sophgo SG2044 MSI controller
genirq/generic-chip: Fix incorrect lock guard conversions
genirq/generic-chip: Remove unused lock wrappers
irqchip: Convert generic irqchip locking to guards
gpio: mvebu: Convert generic irqchip locking to guard()
ARM: orion/gpio:: Convert generic irqchip locking to guard()
...
Move irq-msi-lib.h into include/linux/irqchip, making it available
to compilation units outside of drivers/irqchip.
This requires some churn in drivers to fetch it from the new location,
generated using this script:
git grep -l -w \"irq-msi-lib.h\" | \
xargs sed -i -e 's:"irq-msi-lib.h":\<linux/irqchip/irq-msi-lib.h\>:'
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250513172819.2216709-2-maz@kernel.org
As the controller on SG2044 uses different msi_parent_ops and a difffernt
irq_chip, it is necessary to provide that information to the probe function.
Add a new chipinfo structure to hold that information, implement the
necessary logic and make SG2042 use it.
Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Chen Wang <wangchen20@iscas.ac.cn> # SG2042
Reviewed-by: Chen Wang <unicorn_wang@outlook.com>
Link: https://lore.kernel.org/all/20250413224922.69719-4-inochiama@gmail.com
As the driver logic can be used in both SG2042 and SG2044 SoCs, rename
functions and data structures, which are not SG2042 specific, to SG204x*.
Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Chen Wang <wangchen20@iscas.ac.cn> # SG2042
Reviewed-by: Chen Wang <unicorn_wang@outlook.com>
Link: https://lore.kernel.org/all/20250413224922.69719-3-inochiama@gmail.com
The sg2042-msi driver uses the fallback callbacks set by
msi_lib_init_dev_msi_info(). commit 1c000dcaad ("irqchip/irq-msi-lib:
Optionally set default irq_eoi()/irq_ack()") changed the behavior of the
fallback mechanism by making it opt-in.
The sg2042-msi was not fixed up for this, which causes a NULL pointer
dereference due to the missing irq_ack() callback.
Add the missing chip flag to msi_parent_ops.
Fixes: c667415494 ("irqchip: Add the Sophgo SG2042 MSI interrupt controller")
Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250217085657.789309-3-apatel@ventanamicro.com
Link: https://lore.kernel.org/all/20250405055625.1530180-1-inochiama@gmail.com
