diff options
| author | Sean Christopherson <seanjc@google.com> | 2021-07-13 19:32:41 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-08-02 18:01:49 +0300 |
| commit | 4f117ce4aefca0e90cd44680219d4c261c1381b9 (patch) | |
| tree | 710618f752ea032d8c234813fe7ce52c9722a590 | |
| parent | afc8de0118be84f4058b9977d481aeb3e0758dbb (diff) | |
| download | linux-4f117ce4aefca0e90cd44680219d4c261c1381b9.tar.xz | |
KVM: SVM: Zero out GDTR.base and IDTR.base on INIT
Explicitly set GDTR.base and IDTR.base to zero when intializing the VMCB.
Functionally this only affects INIT, as the bases are implicitly set to
zero on RESET by virtue of the VMCB being zero allocated.
Per AMD's APM, GDTR.base and IDTR.base are zeroed after RESET and INIT.
Fixes: 04d2cc7780d4 ("KVM: Move main vcpu loop into subarch independent code")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210713163324.627647-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/svm/svm.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 4ce6d827fccd..7845232b6fb6 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -1241,7 +1241,9 @@ static void init_vmcb(struct kvm_vcpu *vcpu) SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK; save->cs.limit = 0xffff; + save->gdtr.base = 0; save->gdtr.limit = 0xffff; + save->idtr.base = 0; save->idtr.limit = 0xffff; init_sys_seg(&save->ldtr, SEG_TYPE_LDT); |