Commit 139bdb2d authored by Avi Kivity's avatar Avi Kivity Committed by Linus Torvalds
Browse files

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



Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
Acked-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 5f1e0b6a

drivers/kvm/mmu.c

+8 −4
Original line number Diff line number Diff line
@@ -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;

}