mirror of
https://git.proxmox.com/git/mirror_ubuntu-kernels.git
synced 2025-12-09 08:21:01 +00:00
61d1ea914b
- Handle an allocation failure in the IO/APIC code gracefully instead of
crashing the machine.
- Remove support for APIC local destination mode on 64bit
Logical destination mode of the local APIC is used for systems with up
to 8 CPUs. It has an advantage over physical destination mode as it
allows to target multiple CPUs at once with IPIs. That advantage was
definitely worth it when systems with up to 8 CPUs were state of the
art for servers and workstations, but that's history.
In the recent past there were quite some reports of new laptops failing
to boot with logical destination mode, but they work fine with physical
destination mode. That's not a suprise because physical destination
mode is guaranteed to work as it's the only way to get a CPU up and
running via the INIT/INIT/STARTUP sequence. Some of the affected
systems were cured by BIOS updates, but not all OEMs provide them.
As the number of CPUs keep increasing, logical destination mode becomes
less used and the benefit for small systems, like laptops, is not
really worth the trouble. So just remove logical destination mode
support for 64bit and be done with it.
- Code and comment cleanups in the APIC area.
-----BEGIN PGP SIGNATURE-----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=Y3a/
-----END PGP SIGNATURE-----
Merge tag 'x86-apic-2024-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 APIC updates from Thomas Gleixner:
- Handle an allocation failure in the IO/APIC code gracefully instead
of crashing the machine.
- Remove support for APIC local destination mode on 64bit
Logical destination mode of the local APIC is used for systems with
up to 8 CPUs. It has an advantage over physical destination mode as
it allows to target multiple CPUs at once with IPIs. That advantage
was definitely worth it when systems with up to 8 CPUs were state of
the art for servers and workstations, but that's history.
In the recent past there were quite some reports of new laptops
failing to boot with logical destination mode, but they work fine
with physical destination mode. That's not a suprise because physical
destination mode is guaranteed to work as it's the only way to get a
CPU up and running via the INIT/INIT/STARTUP sequence. Some of the
affected systems were cured by BIOS updates, but not all OEMs provide
them.
As the number of CPUs keep increasing, logical destination mode
becomes less used and the benefit for small systems, like laptops, is
not really worth the trouble. So just remove logical destination mode
support for 64bit and be done with it.
- Code and comment cleanups in the APIC area.
* tag 'x86-apic-2024-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/irq: Fix comment on IRQ vector layout
x86/apic: Remove unused extern declarations
x86/apic: Remove logical destination mode for 64-bit
x86/apic: Remove unused inline function apic_set_eoi_cb()
x86/ioapic: Cleanup remaining coding style issues
x86/ioapic: Cleanup line breaks
x86/ioapic: Cleanup bracket usage
x86/ioapic: Cleanup comments
x86/ioapic: Move replace_pin_at_irq_node() to the call site
iommu/vt-d: Cleanup apic_printk()
x86/mpparse: Cleanup apic_printk()s
x86/ioapic: Cleanup guarded debug printk()s
x86/ioapic: Cleanup apic_printk()s
x86/apic: Cleanup apic_printk()s
x86/apic: Provide apic_printk() helpers
x86/ioapic: Use guard() for locking where applicable
x86/ioapic: Cleanup structs
x86/ioapic: Mark mp_alloc_timer_irq() __init
x86/ioapic: Handle allocation failures gracefully
|
||
|---|---|---|
| .. | ||
| apic_common.c | ||
| apic_flat_64.c | ||
| apic_noop.c | ||
| apic_numachip.c | ||
| apic.c | ||
| bigsmp_32.c | ||
| hw_nmi.c | ||
| init.c | ||
| io_apic.c | ||
| ipi.c | ||
| local.h | ||
| Makefile | ||
| msi.c | ||
| probe_32.c | ||
| probe_64.c | ||
| vector.c | ||
| x2apic_cluster.c | ||
| x2apic_phys.c | ||
| x2apic_uv_x.c | ||