diff options
| author | Sean Christopherson <seanjc@google.com> | 2021-07-13 19:33:10 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-08-02 18:01:56 +0300 |
| commit | d0f9f826d8ac06446391ceb3d4a440f5b48b3134 (patch) | |
| tree | 48081c2c3a2ba01afe4b1fc36699a95945788d06 /arch/x86/kvm/svm/sev.c | |
| parent | 6cfe7b83acdcdd4d4ea9354f007a88bc0ccb16b9 (diff) | |
| download | linux-d0f9f826d8ac06446391ceb3d4a440f5b48b3134.tar.xz | |
KVM: SVM: Stuff save->dr6 at during VMSA sync, not at RESET/INIT
Move code to stuff vmcb->save.dr6 to its architectural init value from
svm_vcpu_reset() into sev_es_sync_vmsa(). Except for protected guests,
a.k.a. SEV-ES guests, vmcb->save.dr6 is set during VM-Enter, i.e. the
extra write is unnecessary. For SEV-ES, stuffing save->dr6 handles a
theoretical case where the VMSA could be encrypted before the first
KVM_RUN.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210713163324.627647-33-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm/sev.c')
| -rw-r--r-- | arch/x86/kvm/svm/sev.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 6710d9ee2e4b..9f1585f40c85 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -584,6 +584,7 @@ static int sev_es_sync_vmsa(struct vcpu_svm *svm) save->xcr0 = svm->vcpu.arch.xcr0; save->pkru = svm->vcpu.arch.pkru; save->xss = svm->vcpu.arch.ia32_xss; + save->dr6 = svm->vcpu.arch.dr6; /* * SEV-ES will use a VMSA that is pointed to by the VMCB, not |