KVM: x86: Check for Intel PT MSR virtualization using KVM cpu caps

Use kvm_cpu_cap_has() to check for Intel PT when processing the list of
virtualized MSRs to pave the way toward removing ->pt_supported().

No functional change intended.

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2020-03-02 15:56:59 -08:00 committed by Paolo Bonzini
parent a7a200eb4c
commit 7b874c26a6

View File

@ -5220,23 +5220,23 @@ static void kvm_init_msr_list(void)
break;
case MSR_IA32_RTIT_CTL:
case MSR_IA32_RTIT_STATUS:
if (!kvm_x86_ops->pt_supported())
if (!kvm_cpu_cap_has(X86_FEATURE_INTEL_PT))
continue;
break;
case MSR_IA32_RTIT_CR3_MATCH:
if (!kvm_x86_ops->pt_supported() ||
if (!kvm_cpu_cap_has(X86_FEATURE_INTEL_PT) ||
!intel_pt_validate_hw_cap(PT_CAP_cr3_filtering))
continue;
break;
case MSR_IA32_RTIT_OUTPUT_BASE:
case MSR_IA32_RTIT_OUTPUT_MASK:
if (!kvm_x86_ops->pt_supported() ||
if (!kvm_cpu_cap_has(X86_FEATURE_INTEL_PT) ||
(!intel_pt_validate_hw_cap(PT_CAP_topa_output) &&
!intel_pt_validate_hw_cap(PT_CAP_single_range_output)))
continue;
break;
case MSR_IA32_RTIT_ADDR0_A ... MSR_IA32_RTIT_ADDR3_B: {
if (!kvm_x86_ops->pt_supported() ||
if (!kvm_cpu_cap_has(X86_FEATURE_INTEL_PT) ||
msrs_to_save_all[i] - MSR_IA32_RTIT_ADDR0_A >=
intel_pt_validate_hw_cap(PT_CAP_num_address_ranges) * 2)
continue;