AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/x86/events/intel
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Kan Liang 80a5ce116f perf/x86/intel: Check perf metrics feature for each CPU 
It might be possible that different CPUs have different CPU metrics on a
platform. In this case, writing the GLOBAL_CTRL_EN_PERF_METRICS bit to
the GLOBAL_CTRL register of a CPU, which doesn't support the TopDown
perf metrics feature, causes MSR access error.

Current TopDown perf metrics feature is enumerated using the boot CPU's
PERF_CAPABILITIES MSR. The MSR only indicates the boot CPU supports this
feature.

Check the PERF_CAPABILITIES MSR for each CPU. If any CPU doesn't support
the perf metrics feature, disable the feature globally.

Fixes: 59a854e2f3 ("perf/x86/intel: Support TopDown metrics on Ice Lake")
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201001211711.25708-1-kan.liang@linux.intel.com
2020-10-03 16:30:56 +02:00
..
bts.c perf/x86: Replace zero-length array with flexible-array 2020-05-19 20:34:16 +02:00
core.c perf/x86/intel: Check perf metrics feature for each CPU 2020-10-03 16:30:56 +02:00
cstate.c perf/x86/cstate: Add Jasper Lake CPU support 2020-04-22 21:43:12 +02:00
ds.c perf/x86/intel/ds: Fix x86_pmu_stop warning for large PEBS 2020-09-10 11:19:33 +02:00
knc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
lbr.c perf/x86/intel/lbr: Support XSAVES for arch LBR read 2020-07-08 11:38:57 +02:00
Makefile perf/x86/rapl: Move RAPL support to common x86 code 2020-05-28 07:58:55 +02:00
p4.c perf_event: Add support for LSM and SELinux checks 2019-10-17 21:31:55 +02:00
p6.c x86/cpu: Rename cpu_data.x86_mask to cpu_data.x86_stepping 2018-02-15 01:15:52 +01:00
pt.c perf/x86/intel/pt: Drop pointless NULL assignment. 2020-04-30 20:14:36 +02:00
pt.h perf/x86/intel/pt: Prevent redundant WRMSRs 2019-11-13 11:06:18 +01:00
uncore_nhmex.c perf/x86/intel/uncore: Correct fixed counter index check for NHM 2018-05-31 12:36:28 +02:00
uncore_snb.c perf/x86/intel/uncore: Reduce the number of CBOX counters 2020-09-29 09:57:01 +02:00
uncore_snbep.c perf/x86/intel/uncore: Fix the scale of the IMC free-running events 2020-09-29 09:57:02 +02:00
uncore.c perf/x86/intel/uncore: Split the Ice Lake and Tiger Lake MSR uncore support 2020-09-29 09:57:00 +02:00
uncore.h perf/x86/intel/uncore: Split the Ice Lake and Tiger Lake MSR uncore support 2020-09-29 09:57:00 +02:00