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KVM: x86: check DR6/7 high-bits are clear only on long-mode

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When the guest sets DR6 and DR7, KVM asserts the high 32-bits are clear, and
otherwise injects a #GP exception. This exception should only be injected only
if running in long-mode.

Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Nadav Amit
2014-06-18 17:19:23 +03:00
committed by Paolo Bonzini
parent 5381417f6a
commit 5777392e83
2 changed files with 19 additions and 1 deletions
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2
arch/x86/kvm/vmx.c
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@@ -5184,7 +5184,7 @@ static int handle_dr(struct kvm_vcpu *vcpu)
return 1;
kvm_register_write(vcpu, reg, val);
} else
if (kvm_set_dr(vcpu, dr, kvm_register_read(vcpu, reg)))
if (kvm_set_dr(vcpu, dr, kvm_register_readl(vcpu, reg)))
return 1;
skip_emulated_instruction(vcpu);