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| author | Sandipan Das <sandipan.das@amd.com> | 2022-05-18 14:13:27 +0530 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-05-19 23:46:14 +0200 |
| commit | bae19fdd7e9e759580ac4693d2df3bc23ab415d7 (patch) | |
| tree | 3b8fd74796ec1f054c9000334682f32914b81a52 /include/linux/sched/signal.h | |
| parent | 841b51e4a3590866d17fa2663c64688c25b891b1 (diff) | |
perf/x86/amd/core: Fix reloading events for SVM
Commit 1018faa6cf23 ("perf/x86/kvm: Fix Host-Only/Guest-Only
counting with SVM disabled") addresses an issue in which the
Host-Only bit in the counter control registers needs to be
masked off when SVM is not enabled.
The events need to be reloaded whenever SVM is enabled or
disabled for a CPU and this requires the PERF_CTL registers
to be reprogrammed using {enable,disable}_all(). However,
PerfMonV2 variants of these functions do not reprogram the
PERF_CTL registers. Hence, the legacy enable_all() function
should also be called.
Fixes: 9622e67e3980 ("perf/x86/amd/core: Add PerfMonV2 counter control")
Reported-by: Like Xu <likexu@tencent.com>
Signed-off-by: Sandipan Das <sandipan.das@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220518084327.464005-1-sandipan.das@amd.com
Diffstat (limited to 'include/linux/sched/signal.h')
0 files changed, 0 insertions, 0 deletions