From patchwork Fri Dec 14 22:52:27 2012
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Subject: KVM: PPC: Only WARN on invalid emulation
Date: Fri, 14 Dec 2012 12:52:27 -0000
From: Alexander Graf <agraf@suse.de>
X-Patchwork-Id: 206588
Message-Id: <1355525547-10543-1-git-send-email-agraf@suse.de>
To: kvm-ppc@vger.kernel.org
Cc: KVM list <kvm@vger.kernel.org>

When we hit an emulation result that we didn't expect, that is an error,
but it's nothing that warrants a BUG(), because it can be guest triggered.

So instead, let's only WARN() the user that this happened.

Signed-off-by: Alexander Graf <agraf@suse.de>

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diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index be83fca..e2225e5 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -237,7 +237,8 @@ int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 		r = RESUME_HOST;
 		break;
 	default:
-		BUG();
+		WARN_ON(1);
+		r = RESUME_GUEST;
 	}
 
 	return r;