diff options
| author | Sean Christopherson <seanjc@google.com> | 2022-10-06 03:03:11 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-11-09 20:31:11 +0300 |
| commit | bec46859fb9d797a21c983100b1f425bebe89747 (patch) | |
| tree | 91aa73353d95b3b0e380414363ea2905c7d222b1 /arch/x86/kvm/vmx/capabilities.h | |
| parent | 0b9ca98b722969660ad98b39f766a561ccb39f5f (diff) | |
| download | linux-bec46859fb9d797a21c983100b1f425bebe89747.tar.xz | |
KVM: x86: Track supported PERF_CAPABILITIES in kvm_caps
Track KVM's supported PERF_CAPABILITIES in kvm_caps instead of computing
the supported capabilities on the fly every time. Using kvm_caps will
also allow for future cleanups as the kvm_caps values can be used
directly in common x86 code.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Acked-by: Like Xu <likexu@tencent.com>
Message-Id: <20221006000314.73240-6-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx/capabilities.h')
| -rw-r--r-- | arch/x86/kvm/vmx/capabilities.h | 25 |
1 files changed, 0 insertions, 25 deletions
diff --git a/arch/x86/kvm/vmx/capabilities.h b/arch/x86/kvm/vmx/capabilities.h index 479124e49bbd..cd2ac9536c99 100644 --- a/arch/x86/kvm/vmx/capabilities.h +++ b/arch/x86/kvm/vmx/capabilities.h @@ -395,31 +395,6 @@ static inline bool vmx_pebs_supported(void) return boot_cpu_has(X86_FEATURE_PEBS) && kvm_pmu_cap.pebs_ept; } -static inline u64 vmx_get_perf_capabilities(void) -{ - u64 perf_cap = PMU_CAP_FW_WRITES; - struct x86_pmu_lbr lbr; - u64 host_perf_cap = 0; - - if (!enable_pmu) - return 0; - - if (boot_cpu_has(X86_FEATURE_PDCM)) - rdmsrl(MSR_IA32_PERF_CAPABILITIES, host_perf_cap); - - x86_perf_get_lbr(&lbr); - if (lbr.nr) - perf_cap |= host_perf_cap & PMU_CAP_LBR_FMT; - - if (vmx_pebs_supported()) { - perf_cap |= host_perf_cap & PERF_CAP_PEBS_MASK; - if ((perf_cap & PERF_CAP_PEBS_FORMAT) < 4) - perf_cap &= ~PERF_CAP_PEBS_BASELINE; - } - - return perf_cap; -} - static inline bool cpu_has_notify_vmexit(void) { return vmcs_config.cpu_based_2nd_exec_ctrl & |