From: Sean Christopherson <seanjc@google.com>
To: Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 10/12] KVM: nSVM: Use KVM-governed feature framework to track "Pause Filter enabled"
Date: Fri, 17 Feb 2023 15:10:20 -0800 [thread overview]
Message-ID: <20230217231022.816138-11-seanjc@google.com> (raw)
In-Reply-To: <20230217231022.816138-1-seanjc@google.com>
Track "Pause Filtering is exposed to L1" via governed feature flags
instead of using dedicated bits/flags in vcpu_svm.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/kvm/governed_features.h | 2 ++
arch/x86/kvm/svm/nested.c | 10 ++++++++--
arch/x86/kvm/svm/svm.c | 8 ++++----
arch/x86/kvm/svm/svm.h | 2 --
4 files changed, 14 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kvm/governed_features.h b/arch/x86/kvm/governed_features.h
index 16c58d61bdf6..93c7d840e546 100644
--- a/arch/x86/kvm/governed_features.h
+++ b/arch/x86/kvm/governed_features.h
@@ -11,6 +11,8 @@ 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 9e210b03e635..c38f17ba818e 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -721,8 +721,14 @@ 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 42591c77f98a..b18bd0b33942 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -4157,11 +4157,11 @@ static void svm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
if (vls && !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);
+ if (kvm_cpu_cap_has(X86_FEATURE_PAUSEFILTER))
+ kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_PAUSEFILTER);
- svm->pause_threshold_enabled = kvm_cpu_cap_has(X86_FEATURE_PFTHRESHOLD) &&
- guest_cpuid_has(vcpu, X86_FEATURE_PFTHRESHOLD);
+ if (kvm_cpu_cap_has(X86_FEATURE_PFTHRESHOLD))
+ 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 60817ff346b0..c05eea319d28 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -258,8 +258,6 @@ 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;
u32 ldr_reg;
--
2.39.2.637.g21b0678d19-goog
next prev parent reply other threads:[~2023-02-17 23:11 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-17 23:10 [PATCH 00/12] KVM: x86: Add "governed" X86_FEATURE framework Sean Christopherson
2023-02-17 23:10 ` [PATCH 01/12] KVM: x86: Add a framework for enabling KVM-governed x86 features Sean Christopherson
2023-02-21 17:12 ` Vitaly Kuznetsov
2023-06-29 2:40 ` Binbin Wu
2023-06-29 16:26 ` Sean Christopherson
2023-06-30 8:01 ` Chao Gao
2023-06-30 15:31 ` Sean Christopherson
2023-02-17 23:10 ` [PATCH 02/12] KVM: x86/mmu: Use KVM-governed feature framework to track "GBPAGES enabled" Sean Christopherson
2023-02-17 23:10 ` [PATCH 03/12] KVM: VMX: Recompute "XSAVES enabled" only after CPUID update Sean Christopherson
2023-02-17 23:10 ` [PATCH 04/12] KVM: VMX: Rename XSAVES control to follow KVM's preferred "ENABLE_XYZ" Sean Christopherson
2023-02-17 23:10 ` [PATCH 05/12] KVM: x86: Use KVM-governed feature framework to track "XSAVES enabled" Sean Christopherson
2023-02-21 14:56 ` Yu Zhang
2023-02-22 18:56 ` Sean Christopherson
2023-02-24 9:54 ` Yu Zhang
2023-02-17 23:10 ` [PATCH 06/12] KVM: nSVM: Use KVM-governed feature framework to track "NRIPS enabled" Sean Christopherson
2023-02-17 23:10 ` [PATCH 07/12] KVM: nSVM: Use KVM-governed feature framework to track "TSC scaling enabled" Sean Christopherson
2023-02-17 23:10 ` [PATCH 08/12] KVM: nSVM: Use KVM-governed feature framework to track "vVM{SAVE,LOAD} enabled" Sean Christopherson
2023-02-21 15:23 ` Yu Zhang
2023-02-21 15:33 ` Yu Zhang
2023-02-21 23:48 ` Sean Christopherson
2023-02-22 6:49 ` Yu Zhang
2023-02-22 16:39 ` Sean Christopherson
2023-02-24 9:25 ` Yu Zhang
2023-02-24 16:16 ` Sean Christopherson
2023-06-29 16:50 ` Sean Christopherson
2023-06-30 10:00 ` Yu Zhang
2023-02-17 23:10 ` [PATCH 09/12] KVM: nSVM: Use KVM-governed feature framework to track "LBRv enabled" Sean Christopherson
2023-02-17 23:10 ` Sean Christopherson [this message]
2023-02-17 23:10 ` [PATCH 11/12] KVM: nSVM: Use KVM-governed feature framework to track "vGIF enabled" Sean Christopherson
2023-02-17 23:10 ` [PATCH 12/12] KVM: x86: Disallow guest CPUID lookups when IRQs are disabled Sean Christopherson
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