diff options
| author | Sean Christopherson <[email protected]> | 2023-01-28 00:14:27 +0000 |
|---|---|---|
| committer | Sean Christopherson <[email protected]> | 2023-04-05 17:00:17 -0700 |
| commit | 098f4c061ea10b777033b71c10bd9fd706820ee9 (patch) | |
| tree | d26bcef602bd8206720e28504d2ec7521f864a4b /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | 7e768ce8278bafe43e2a4771a82b61856190a3fc (diff) | |
KVM: x86/pmu: Disallow legacy LBRs if architectural LBRs are available
Disallow enabling LBR support if the CPU supports architectural LBRs.
Traditional LBR support is absent on CPU models that have architectural
LBRs, and KVM doesn't yet support arch LBRs, i.e. KVM will pass through
non-existent MSRs if userspace enables LBRs for the guest.
Cc: [email protected]
Cc: Yang Weijiang <[email protected]>
Cc: Like Xu <[email protected]>
Reported-by: Paolo Bonzini <[email protected]>
Fixes: be635e34c284 ("KVM: vmx/pmu: Expose LBR_FMT in the MSR_IA32_PERF_CAPABILITIES")
Tested-by: Like Xu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sean Christopherson <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions