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| author |  Sean Christopherson <seanjc@google.com>
| 2024-03-06 17:13:42 -0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com>
| 2024-04-11 12:58:46 -0700 |
| commit | 447112d7edd77fa468938377418434233bcb3709 (patch) | |
| tree | a09c7abb357f62c358ce77af2fd47f200affb6de /arch/x86/kvm/vmx/pmu_intel.c | |
| parent | KVM: VMX: Ignore MKTME KeyID bits when intercepting #PF for allow_smaller_max... (diff) | |
| download | linux-447112d7edd77fa468938377418434233bcb3709.tar.gz linux-447112d7edd77fa468938377418434233bcb3709.tar.bz2 linux-447112d7edd77fa468938377418434233bcb3709.zip | |
KVM: VMX: Snapshot LBR capabilities during module initialization
Snapshot VMX's LBR capabilities once during module initialization instead
of calling into perf every time a vCPU reconfigures its vPMU. This will
allow massaging the LBR capabilities, e.g. if the CPU doesn't support
callstacks, without having to remember to update multiple locations.
Opportunistically tag vmx_get_perf_capabilities() with __init, as it's
only called from vmx_set_cpu_caps().
Reviewed-by: Mingwei Zhang <mizhang@google.com>
Link: https://lore.kernel.org/r/20240307011344.835640-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/vmx/pmu_intel.c')
| -rw-r--r-- | arch/x86/kvm/vmx/pmu_intel.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c index 12ade343a17e..be40474de6e4 100644 --- a/arch/x86/kvm/vmx/pmu_intel.c +++ b/arch/x86/kvm/vmx/pmu_intel.c @@ -535,7 +535,7 @@ static void intel_pmu_refresh(struct kvm_vcpu *vcpu) perf_capabilities = vcpu_get_perf_capabilities(vcpu); if (cpuid_model_is_consistent(vcpu) && (perf_capabilities & PMU_CAP_LBR_FMT)) - x86_perf_get_lbr(&lbr_desc->records); + memcpy(&lbr_desc->records, &vmx_lbr_caps, sizeof(vmx_lbr_caps)); else lbr_desc->records.nr = 0; |