diff options
| author | Like Xu <likexu@tencent.com> | 2022-04-11 13:19:46 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-06-08 11:48:22 +0300 |
| commit | cf8e55fe50df0c0292b389a165daa81193cd39d1 (patch) | |
| tree | 7766a5c5648de4f7476286b45191c709f33749b1 /arch/x86/kvm/vmx/vmx.c | |
| parent | 59cc99f6e971bb24b40e27f695daab98e2eff4b8 (diff) | |
| download | linux-cf8e55fe50df0c0292b389a165daa81193cd39d1.tar.xz | |
KVM: x86/pmu: Expose CPUIDs feature bits PDCM, DS, DTES64
The CPUID features PDCM, DS and DTES64 are required for PEBS feature.
KVM would expose CPUID feature PDCM, DS and DTES64 to guest when PEBS
is supported in the KVM on the Ice Lake server platforms.
Originally-by: Andi Kleen <ak@linux.intel.com>
Co-developed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Co-developed-by: Luwei Kang <luwei.kang@intel.com>
Signed-off-by: Luwei Kang <luwei.kang@intel.com>
Signed-off-by: Like Xu <likexu@tencent.com>
Message-Id: <20220411101946.20262-18-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 403a8834cc79..55a8578255cb 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -2245,6 +2245,17 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) if (!cpuid_model_is_consistent(vcpu)) return 1; } + if (data & PERF_CAP_PEBS_FORMAT) { + if ((data & PERF_CAP_PEBS_MASK) != + (vmx_get_perf_capabilities() & PERF_CAP_PEBS_MASK)) + return 1; + if (!guest_cpuid_has(vcpu, X86_FEATURE_DS)) + return 1; + if (!guest_cpuid_has(vcpu, X86_FEATURE_DTES64)) + return 1; + if (!cpuid_model_is_consistent(vcpu)) + return 1; + } ret = kvm_set_msr_common(vcpu, msr_info); break; @@ -7517,6 +7528,10 @@ static __init void vmx_set_cpu_caps(void) kvm_cpu_cap_clear(X86_FEATURE_INVPCID); if (vmx_pt_mode_is_host_guest()) kvm_cpu_cap_check_and_set(X86_FEATURE_INTEL_PT); + if (vmx_pebs_supported()) { + kvm_cpu_cap_check_and_set(X86_FEATURE_DS); + kvm_cpu_cap_check_and_set(X86_FEATURE_DTES64); + } if (!enable_sgx) { kvm_cpu_cap_clear(X86_FEATURE_SGX); |