From 59d67fc1f0dbb5ee8841d62140efe0fdc4fbabf5 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Tue, 15 Aug 2023 13:36:50 -0700 Subject: KVM: nSVM: Use KVM-governed feature framework to track "Pause Filter enabled" Track "Pause Filtering is exposed to L1" via governed feature flags instead of using dedicated bits/flags in vcpu_svm. No functional change intended. Reviewed-by: Yuan Yao Link: https://lore.kernel.org/r/20230815203653.519297-13-seanjc@google.com Signed-off-by: Sean Christopherson --- arch/x86/kvm/governed_features.h | 2 ++ arch/x86/kvm/svm/nested.c | 10 ++++++++-- arch/x86/kvm/svm/svm.c | 7 ++----- arch/x86/kvm/svm/svm.h | 2 -- 4 files changed, 12 insertions(+), 9 deletions(-) diff --git a/arch/x86/kvm/governed_features.h b/arch/x86/kvm/governed_features.h index 3a4c0e40e1e0..9afd34f30599 100644 --- a/arch/x86/kvm/governed_features.h +++ b/arch/x86/kvm/governed_features.h @@ -12,6 +12,8 @@ KVM_GOVERNED_X86_FEATURE(NRIPS) KVM_GOVERNED_X86_FEATURE(TSCRATEMSR) KVM_GOVERNED_X86_FEATURE(V_VMSAVE_VMLOAD) KVM_GOVERNED_X86_FEATURE(LBRV) +KVM_GOVERNED_X86_FEATURE(PAUSEFILTER) +KVM_GOVERNED_X86_FEATURE(PFTHRESHOLD) #undef KVM_GOVERNED_X86_FEATURE #undef KVM_GOVERNED_FEATURE diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index f50f74b1a04e..ac03b2bc5b2c 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -743,8 +743,14 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm, if (!nested_vmcb_needs_vls_intercept(svm)) vmcb02->control.virt_ext |= VIRTUAL_VMLOAD_VMSAVE_ENABLE_MASK; - pause_count12 = svm->pause_filter_enabled ? svm->nested.ctl.pause_filter_count : 0; - pause_thresh12 = svm->pause_threshold_enabled ? svm->nested.ctl.pause_filter_thresh : 0; + if (guest_can_use(vcpu, X86_FEATURE_PAUSEFILTER)) + pause_count12 = svm->nested.ctl.pause_filter_count; + else + pause_count12 = 0; + if (guest_can_use(vcpu, X86_FEATURE_PFTHRESHOLD)) + pause_thresh12 = svm->nested.ctl.pause_filter_thresh; + else + pause_thresh12 = 0; if (kvm_pause_in_guest(svm->vcpu.kvm)) { /* use guest values since host doesn't intercept PAUSE */ vmcb02->control.pause_filter_count = pause_count12; diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 3b8e412238d3..0dc70ad88d29 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -4271,11 +4271,8 @@ static void svm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu) if (!guest_cpuid_is_intel(vcpu)) kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_V_VMSAVE_VMLOAD); - svm->pause_filter_enabled = kvm_cpu_cap_has(X86_FEATURE_PAUSEFILTER) && - guest_cpuid_has(vcpu, X86_FEATURE_PAUSEFILTER); - - svm->pause_threshold_enabled = kvm_cpu_cap_has(X86_FEATURE_PFTHRESHOLD) && - guest_cpuid_has(vcpu, X86_FEATURE_PFTHRESHOLD); + kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_PAUSEFILTER); + kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_PFTHRESHOLD); svm->vgif_enabled = vgif && guest_cpuid_has(vcpu, X86_FEATURE_VGIF); diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index 0e21823e8a19..fb438439b61e 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -259,8 +259,6 @@ struct vcpu_svm { bool soft_int_injected; /* optional nested SVM features that are enabled for this guest */ - bool pause_filter_enabled : 1; - bool pause_threshold_enabled : 1; bool vgif_enabled : 1; bool vnmi_enabled : 1; -- cgit v1.2.3