From: Avi Kivity <avi@qumranet.com>
Date: Sat, 6 Jan 2007 00:36:50 +0000 (-0800)
Subject: [PATCH] KVM: MMU: If an empty shadow page is not empty, report more info
X-Git-Tag: v3.12-rc1~32012
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=139bdb2d9e410d448281057a37b53770324ccac8;p=kernel%2Fkernel-generic.git

[PATCH] KVM: MMU: If an empty shadow page is not empty, report more info

Signed-off-by: Avi Kivity <avi@qumranet.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index b9ba240..8cf3688 100644
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -305,12 +305,16 @@ static void rmap_write_protect(struct kvm *kvm, u64 gfn)
 
 static int is_empty_shadow_page(hpa_t page_hpa)
 {
-	u32 *pos;
-	u32 *end;
-	for (pos = __va(page_hpa), end = pos + PAGE_SIZE / sizeof(u32);
+	u64 *pos;
+	u64 *end;
+
+	for (pos = __va(page_hpa), end = pos + PAGE_SIZE / sizeof(u64);
 		      pos != end; pos++)
-		if (*pos != 0)
+		if (*pos != 0) {
+			printk(KERN_ERR "%s: %p %llx\n", __FUNCTION__,
+			       pos, *pos);
 			return 0;
+		}
 	return 1;
 }