From: Alexander Graf <agraf@suse.de>
Date: Fri, 14 Dec 2012 22:46:03 +0000 (+0100)
Subject: KVM: PPC: Only WARN on invalid emulation
X-Git-Tag: firefly_0821_release~3680^2~569^2~191^2~6
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5a33169ed29060df71627103e6968078b42de945;p=firefly-linux-kernel-4.4.55.git

KVM: PPC: Only WARN on invalid emulation

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>
---

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index be83fca2e8fd..e2225e5b8a4c 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;