From: Avi Kivity <avi@redhat.com>
Date: Wed, 2 Dec 2009 13:17:00 +0000 (+0200)
Subject: KVM: MMU: Report spte not found in rmap before BUG()
X-Git-Tag: upstream/snapshot3+hdmi~15496^2~142
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=186a3e526ac1b4063a723f90ae4893beedb24fc6;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

KVM: MMU: Report spte not found in rmap before BUG()

In the past we've had errors of single-bit in the other two cases; the
printk() may confirm it for the third case (many->many).

Signed-off-by: Avi Kivity <avi@redhat.com>
---

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 89a49fb..4f499d7 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -662,6 +662,7 @@ static void rmap_remove(struct kvm *kvm, u64 *spte)
 			prev_desc = desc;
 			desc = desc->more;
 		}
+		pr_err("rmap_remove: %p %llx many->many\n", spte, *spte);
 		BUG();
 	}
 }