Messages in this thread | | | Subject | Re: [PATCH v2 09/15] svm: Add support for activate/deactivate AVIC at runtime | From | Alexander Graf <> | Date | Mon, 19 Aug 2019 12:28:29 +0200 |
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On 15.08.19 18:25, Suthikulpanit, Suravee wrote: > Add necessary logics for supporting activate/deactivate AVIC at runtime. > > Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> > --- > arch/x86/kvm/svm.c | 27 +++++++++++++++++++++++++-- > 1 file changed, 25 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c > index 47f2439..cfa4b13 100644 > --- a/arch/x86/kvm/svm.c > +++ b/arch/x86/kvm/svm.c > @@ -385,6 +385,7 @@ struct amd_svm_iommu_ir { > static void svm_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa); > static void svm_complete_interrupts(struct vcpu_svm *svm); > static bool svm_get_enable_apicv(struct kvm *kvm); > +static inline void avic_post_state_restore(struct kvm_vcpu *vcpu); > > static int nested_svm_exit_handled(struct vcpu_svm *svm); > static int nested_svm_intercept(struct vcpu_svm *svm); > @@ -2343,6 +2344,10 @@ static void svm_vcpu_blocking(struct kvm_vcpu *vcpu) > > static void svm_vcpu_unblocking(struct kvm_vcpu *vcpu) > { > + if (kvm_check_request(KVM_REQ_APICV_ACTIVATE, vcpu)) > + kvm_vcpu_activate_apicv(vcpu); > + if (kvm_check_request(KVM_REQ_APICV_DEACTIVATE, vcpu)) > + kvm_vcpu_deactivate_apicv(vcpu); > avic_set_running(vcpu, true); > } > > @@ -5182,10 +5187,19 @@ static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu) > struct vcpu_svm *svm = to_svm(vcpu); > struct vmcb *vmcb = svm->vmcb; > > - if (kvm_vcpu_apicv_active(vcpu)) > + if (kvm_vcpu_apicv_active(vcpu)) { > + /** > + * During AVIC temporary deactivation, guest could update > + * APIC ID, DFR and LDR registers, which would not be trapped > + * by avic_unaccelerated_ccess_interception(). In this case,
typo
Alex
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