linux/arch/x86/events
Sandipan Das ad8c91282c perf/x86/amd/core: Avoid register reset when CPU is dead
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
2024-03-13 11:01:30 +01:00
..
amd perf/x86/amd/core: Avoid register reset when CPU is dead 2024-03-13 11:01:30 +01:00
intel Misc cleanups, including a large series from Thomas Gleixner to 2024-03-11 19:37:56 -07:00
zhaoxin x86/perf/zhaoxin: Add stepping check for ZXC 2023-02-11 11:18:12 +01:00
core.c perf: Add branch_sample_call_stack 2023-10-27 15:05:09 +02:00
Kconfig perf/x86/Kconfig: Fix indentation in the Kconfig file 2022-05-25 15:54:26 +02:00
Makefile perf/x86: Move branch classifier 2022-08-27 00:05:44 +02:00
msr.c x86/cpu: Fix Gracemont uarch 2023-08-09 21:51:06 +02:00
perf_event_flags.h perf/x86/intel: Support branch counters logging 2023-10-27 15:05:11 +02:00
perf_event.h perf/x86/intel: Support branch counters logging 2023-10-27 15:05:11 +02:00
probe.c perf/x86/rapl: Add msr mask support 2021-02-10 14:44:54 +01:00
probe.h perf/x86/rapl: Add msr mask support 2021-02-10 14:44:54 +01:00
rapl.c x86/cpu/topology: Rename topology_max_die_per_package() 2024-02-15 22:07:45 +01:00
utils.c perf/x86/lbr: Filter vsyscall addresses 2023-10-08 12:25:18 +02:00