diff options
| author | Krish Sadhukhan <[email protected]> | 2020-05-22 18:19:52 -0400 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2020-07-08 16:21:41 -0400 |
| commit | 1aef8161b38a531895a8bffad0e9fb1445ca91f7 (patch) | |
| tree | 19dac418430e856b559009dad3ebc9188dc9ba20 | |
| parent | f5f6145e41d39c7fd04a17c3b2596c7abe933f10 (diff) | |
KVM: nSVM: Check that DR6[63:32] and DR7[64:32] are not set on vmrun of nested guests
According to section "Canonicalization and Consistency Checks" in APM vol. 2
the following guest state is illegal:
"DR6[63:32] are not zero."
"DR7[63:32] are not zero."
"Any MBZ bit of EFER is set."
Signed-off-by: Krish Sadhukhan <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
| -rw-r--r-- | arch/x86/kvm/svm/nested.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index 6bceafb19108..e4ef980981af 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -231,6 +231,9 @@ static bool nested_vmcb_checks(struct vmcb *vmcb) (vmcb->save.cr0 & X86_CR0_NW)) return false; + if (!kvm_dr6_valid(vmcb->save.dr6) || !kvm_dr7_valid(vmcb->save.dr7)) + return false; + return nested_vmcb_check_controls(&vmcb->control); } |