Song Liu f3fd84a3b7 x86/perf: Fix snapshot_branch_stack warning in VM ... When running in VM intel_pmu_snapshot_branch_stack triggers WRMSR warning like: [ ] unchecked MSR access error: WRMSR to 0x3f1 (tried to write 0x0000000000000000) at rIP: 0xffffffff81011a5b (intel_pmu_snapshot_branch_stack+0x3b/0xd0) This can be triggered with BPF selftests: tools/testing/selftests/bpf/test_progs -t get_branch_snapshot This warning is caused by __intel_pmu_pebs_disable_all() in the VM. Since it is not necessary to disable PEBS for LBR, remove it from intel_pmu_snapshot_branch_stack and intel_pmu_snapshot_arch_branch_stack. Fixes: c22ac2a3d4 ("perf: Enable branch record for software events") Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Like Xu <likexu@tencent.com> Link: https://lore.kernel.org/r/20211112054510.2667030-1-songliubraving@fb.com		2021-11-17 14:48:43 +01:00
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amd	perf/x86/amd/ibs: Add bitfield definitions in new <asm/amd-ibs.h> header	2021-08-26 09:14:36 +02:00
intel	x86/perf: Fix snapshot_branch_stack warning in VM	2021-11-17 14:48:43 +01:00
zhaoxin	x86: Fix various typos in comments	2021-03-18 15:31:53 +01:00
core.c	perf updates:	2021-11-01 13:12:15 -07:00
Kconfig	perf/amd/uncore: Allow the driver to be built as a module	2021-08-26 09:14:36 +02:00
Makefile	perf/x86/rapl: Fix RAPL config variable bug	2020-06-02 11:52:56 +02:00
msr.c	perf/x86/msr: Add Sapphire Rapids CPU support	2021-10-15 11:25:26 +02:00
perf_event.h	Core:	2021-11-02 06:20:58 -07:00
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	perf/x86/rapl: Use CPUID bit on AMD and Hygon parts	2021-06-01 21:10:33 +02:00