linux

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

[ Upstream commit ad8c91282c95f801c37812d59d2d9eba6899b384 ]

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: 21d59e3e2c40 ("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

rtc: Add support for configuring the UIP timeout for RTC reads

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

arc

work around gcc bugs with 'asm goto' with outputs

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

arm

crypto: arm/sha - fix function cast warnings

2024-03-26 18:19:51 -04:00

arm64

arm64: ftrace: Don't forbid CALL_OPS+CC_OPTIMIZE_FOR_SIZE with Clang