Sandipan Das 7be89bd65f perf/x86/amd/core: Avoid register reset when CPU is dead ...

[ Upstream commit ad8c91282c ]

When bringing a CPU online, some of the PMC and LBR related registers
are reset. The same is done when a CPU is taken offline although that
is unnecessary. This currently happens in the "cpu_dead" callback which
is also incorrect as the callback runs on a control CPU instead of the
one that is being taken offline. This also affects hibernation and
suspend to RAM on some platforms as reported in the link below.

Fixes: 21d59e3e2c ("perf/x86/amd/core: Detect PerfMonV2 support")
Reported-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Sandipan Das <sandipan.das@amd.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/550a026764342cf7e5812680e3e2b91fe662b5ac.1706526029.git.sandipan.das@amd.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-03-26 18:20:03 -04:00

..

alpha

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2024-01-31 16:18:56 -08:00

arc

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arm

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arm64

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csky

work around gcc bugs with 'asm goto' with outputs

2024-02-23 09:24:47 +01:00

hexagon

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2023-08-31 12:20:12 -07:00

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cpu-hotplug: Provide prototypes for arch CPU registration

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2024-03-01 13:34:58 +01:00

m68k

mm: Introduce flush_cache_vmap_early()

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microblaze

Merge tag 'microblaze-v6.6' of git://git.monstr.eu/linux-2.6-microblaze

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mips

MIPS: Clear Cause.BD in instruction_pointer_set

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nios2

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openrisc

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2023-09-05 10:09:31 -07:00

parisc

parisc/ftrace: add missing CONFIG_DYNAMIC_FTRACE check

2024-03-26 18:19:12 -04:00

powerpc

powerpc/embedded6xx: Fix no previous prototype for avr_uart_send() etc.

2024-03-26 18:19:55 -04:00

riscv

riscv: dts: sifive: add missing #interrupt-cells to pmic

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s390

s390/cache: prevent rebuild of shared_cpu_list

2024-03-26 18:19:38 -04:00

sh

mm: Introduce flush_cache_vmap_early()

2024-02-16 19:10:52 +01:00

sparc

sparc32: Fix section mismatch in leon_pci_grpci

2024-03-26 18:19:56 -04:00

um

um: Fix adding '-no-pie' for clang

2024-02-23 09:25:03 +01:00

x86

perf/x86/amd/core: Avoid register reset when CPU is dead

2024-03-26 18:20:03 -04:00

xtensa

work around gcc bugs with 'asm goto' with outputs

2024-02-23 09:24:47 +01:00

.gitignore

…

Kconfig

scs: add CONFIG_MMU dependency for vfree_atomic()

2024-02-23 09:24:54 +01:00