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| author |   Sean Christopherson <seanjc@google.com> | 2023-03-10 16:46:04 -0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-04-06 14:58:43 -0700 |
| commit | 3a6de51a437fb4d2433f8a99fb59f43866cdbb98 (patch) | |
| tree | 1371bd9dfa246de0d6a82829b7c535e6a6eb61c4 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | KVM: x86: Disallow writes to immutable feature MSRs after KVM_RUN (diff) | |
| download | linux-rng-3a6de51a437fb4d2433f8a99fb59f43866cdbb98.tar.xz linux-rng-3a6de51a437fb4d2433f8a99fb59f43866cdbb98.zip | |
KVM: x86/pmu: WARN and bug the VM if PMU is refreshed after vCPU has run
Now that KVM disallows changing feature MSRs, i.e. PERF_CAPABILITIES,
after running a vCPU, WARN and bug the VM if the PMU is refreshed after
the vCPU has run.
Note, KVM has disallowed CPUID updates after running a vCPU since commit
feb627e8d6f6 ("KVM: x86: Forbid KVM_SET_CPUID{,2} after KVM_RUN"), i.e.
PERF_CAPABILITIES was the only remaining way to trigger a PMU refresh
after KVM_RUN.
Cc: Like Xu <like.xu.linux@gmail.com>
Link: https://lore.kernel.org/r/20230311004618.920745-8-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions