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| author | Maxim Levitsky <mlevitsk@redhat.com> | 2023-02-27 11:40:09 +0300 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-03-22 22:34:32 +0300 |
| commit | 772f254d4d5687ee349cbe443959bc01304880d6 (patch) | |
| tree | a864382c85dba50ad6c07340440b1035f776b4fd /arch/x86/kvm/svm | |
| parent | 5d1ec4565200f461943990f0988932ca86823087 (diff) | |
| download | linux-772f254d4d5687ee349cbe443959bc01304880d6.tar.xz | |
KVM: SVM: add wrappers to enable/disable IRET interception
SEV-ES guests don't use IRET interception for the detection of
an end of a NMI.
Therefore it makes sense to create a wrapper to avoid repeating
the check for the SEV-ES.
No functional change is intended.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
[Renamed iret intercept API of style svm_{clr,set}_iret_intercept()]
Signed-off-by: Santosh Shukla <Santosh.Shukla@amd.com>
Link: https://lore.kernel.org/r/20230227084016.3368-5-santosh.shukla@amd.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/svm')
| -rw-r--r-- | arch/x86/kvm/svm/svm.c | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index e347225b3914..69ace08ab1e4 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -2490,16 +2490,29 @@ static int task_switch_interception(struct kvm_vcpu *vcpu) has_error_code, error_code); } +static void svm_clr_iret_intercept(struct vcpu_svm *svm) +{ + if (!sev_es_guest(svm->vcpu.kvm)) + svm_clr_intercept(svm, INTERCEPT_IRET); +} + +static void svm_set_iret_intercept(struct vcpu_svm *svm) +{ + if (!sev_es_guest(svm->vcpu.kvm)) + svm_set_intercept(svm, INTERCEPT_IRET); +} + static int iret_interception(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); ++vcpu->stat.nmi_window_exits; svm->awaiting_iret_completion = true; - if (!sev_es_guest(vcpu->kvm)) { - svm_clr_intercept(svm, INTERCEPT_IRET); + + svm_clr_iret_intercept(svm); + if (!sev_es_guest(vcpu->kvm)) svm->nmi_iret_rip = kvm_rip_read(vcpu); - } + kvm_make_request(KVM_REQ_EVENT, vcpu); return 1; } @@ -3508,8 +3521,7 @@ static void svm_inject_nmi(struct kvm_vcpu *vcpu) return; svm->nmi_masked = true; - if (!sev_es_guest(vcpu->kvm)) - svm_set_intercept(svm, INTERCEPT_IRET); + svm_set_iret_intercept(svm); ++vcpu->stat.nmi_injections; } @@ -3649,12 +3661,10 @@ static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked) if (masked) { svm->nmi_masked = true; - if (!sev_es_guest(vcpu->kvm)) - svm_set_intercept(svm, INTERCEPT_IRET); + svm_set_iret_intercept(svm); } else { svm->nmi_masked = false; - if (!sev_es_guest(vcpu->kvm)) - svm_clr_intercept(svm, INTERCEPT_IRET); + svm_clr_iret_intercept(svm); } } |