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From:   Paolo Bonzini <pbonzini@redhat.com>
To:     linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc:     oupton@google.com, stable@vger.kernel.org
Subject: [FYI PATCH 1/3] KVM: nVMX: Don't emulate instructions in guest mode
Date:   Mon, 24 Feb 2020 19:56:34 +0100
Message-Id: <1582570596-45387-2-git-send-email-pbonzini@redhat.com>
In-Reply-To: <1582570596-45387-1-git-send-email-pbonzini@redhat.com>
References: <1582570596-45387-1-git-send-email-pbonzini@redhat.com>
Sender: linux-kernel-owner@vger.kernel.org
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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>
---
 arch/x86/kvm/vmx/vmx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index dcca514ffd42..5801a86f9c24 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7164,7 +7164,7 @@ static int vmx_check_intercept(struct kvm_vcpu *vcpu,
 	}
 
 	/* TODO: check more intercepts... */
-	return X86EMUL_CONTINUE;
+	return X86EMUL_UNHANDLEABLE;
 }
 
 #ifdef CONFIG_X86_64
-- 
1.8.3.1