KVM: nVMX: Don't emulate instructions in guest mode

commit 07721feee46b4b248402133228235318199b05ec upstream.

vmx_check_intercept is not yet fully implemented. To avoid emulating
instructions disallowed by the L1 hypervisor, refuse to emulate
instructions by default.

Cc: stable@vger.kernel.org
[Made commit, added commit msg - Oliver]
Signed-off-by: Oliver Upton <oupton@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index aead984..93d0f00 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -13694,7 +13694,7 @@ static int vmx_check_intercept(struct kvm_vcpu *vcpu,
        }
 
        /* TODO: check more intercepts... */
-       return X86EMUL_CONTINUE;
+       return X86EMUL_UNHANDLEABLE;
 }
 
 #ifdef CONFIG_X86_64