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| author | Oliver Upton <oliver.upton@linux.dev> | 2024-03-05 18:48:39 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-10 16:35:48 +0200 |
| commit | 9e2af26c29c6c6f1215d56c3246da148e54b2357 (patch) | |
| tree | ae8a3b37e541a3111177c08c2cd03eb7386d55a7 /security | |
| parent | 651bf5b1d0708d277e5f2cf2887ec27d3b04f500 (diff) | |
| download | linux-9e2af26c29c6c6f1215d56c3246da148e54b2357.tar.gz linux-9e2af26c29c6c6f1215d56c3246da148e54b2357.tar.bz2 linux-9e2af26c29c6c6f1215d56c3246da148e54b2357.zip | |
KVM: arm64: Fix host-programmed guest events in nVHE
commit e89c928bedd77d181edc2df01cb6672184775140 upstream.
Programming PMU events in the host that count during guest execution is
a feature supported by perf, e.g.
perf stat -e cpu_cycles:G ./lkvm run
While this works for VHE, the guest/host event bitmaps are not carried
through to the hypervisor in the nVHE configuration. Make
kvm_pmu_update_vcpu_events() conditional on whether or not _hardware_
supports PMUv3 rather than if the vCPU as vPMU enabled.
Cc: stable@vger.kernel.org
Fixes: 84d751a019a9 ("KVM: arm64: Pass pmu events to hyp via vcpu")
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240305184840.636212-3-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions