KVM: nSVM: CR3 MBZ bits are only 63:52
Commit 761e4169346553c180bbd4a383aedd72f905bc9a created a wrong mask for the
CR3 MBZ bits. According to APM vol 2, only the upper 12 bits are MBZ.
Fixes: 761e41693465 ("KVM: nSVM: Check that MBZ bits in CR3 and CR4 are not set on vmrun of nested guests", 2020-07-08)
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Message-Id: <20200829004824.4577-2-krish.sadhukhan@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index cf6e74b..da5e87d 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -237,7 +237,7 @@ static bool nested_vmcb_checks(struct vcpu_svm *svm, struct vmcb *vmcb12)
} else {
if (!(vmcb12->save.cr4 & X86_CR4_PAE) ||
!(vmcb12->save.cr0 & X86_CR0_PE) ||
- (vmcb12->save.cr3 & MSR_CR3_LONG_RESERVED_MASK))
+ (vmcb12->save.cr3 & MSR_CR3_LONG_MBZ_MASK))
return false;
}
if (kvm_valid_cr4(&svm->vcpu, vmcb12->save.cr4))