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KVM: SVM: Do not activate AVIC for SEV-enabled guest

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Since current AVIC implementation cannot support encrypted memory,
inhibit AVIC for SEV-enabled guest.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Message-Id: <20220408133710.54275-1-suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Suravee Suthikulpanit 2022-04-08 08:37:10 -05:00 committed by Paolo Bonzini
parent af105c9cc9
commit c538dc792f
3 changed files with 5 additions and 1 deletions
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1
arch/x86/include/asm/kvm_host.h
View File

@ -1052,6 +1052,7 @@ enum kvm_apicv_inhibit {
APICV_INHIBIT_REASON_X2APIC,
APICV_INHIBIT_REASON_BLOCKIRQ,
APICV_INHIBIT_REASON_ABSENT,
APICV_INHIBIT_REASON_SEV,
};
struct kvm_arch {

3
arch/x86/kvm/svm/avic.c
View File

@ -837,7 +837,8 @@ bool avic_check_apicv_inhibit_reasons(enum kvm_apicv_inhibit reason)
BIT(APICV_INHIBIT_REASON_IRQWIN) |
BIT(APICV_INHIBIT_REASON_PIT_REINJ) |
BIT(APICV_INHIBIT_REASON_X2APIC) |
BIT(APICV_INHIBIT_REASON_BLOCKIRQ);
BIT(APICV_INHIBIT_REASON_BLOCKIRQ) |
BIT(APICV_INHIBIT_REASON_SEV);
return supported & BIT(reason);
}

2
arch/x86/kvm/svm/sev.c
View File

@ -260,6 +260,8 @@ static int sev_guest_init(struct kvm *kvm, struct kvm_sev_cmd *argp)
INIT_LIST_HEAD(&sev->regions_list);
INIT_LIST_HEAD(&sev->mirror_vms);
kvm_set_apicv_inhibit(kvm, APICV_INHIBIT_REASON_SEV);
return 0;
e_free: