From 1722465ebd480af0f924bf00c5edceb81dd3003a Mon Sep 17 00:00:00 2001
From: Gleb Natapov <gleb@redhat.com>
Date: Sun, 17 May 2009 10:43:05 -0500
Subject: [PATCH] kvm: extboot: Update number of HDs reported by BIOS

The Vista boot loaded expects the bios to report a correct count of the
bootable disks; and extboot disks are bootable.

This fixes Vista boot from virtio-blk issue.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
 kvm/extboot/extboot.S | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kvm/extboot/extboot.S b/kvm/extboot/extboot.S
index e3d1adf846..1e60f68785 100644
--- a/kvm/extboot/extboot.S
+++ b/kvm/extboot/extboot.S
@@ -32,6 +32,9 @@ _start:
 	xor %ax, %ax
 	mov %ax, %ds
 
+	/* there is one more bootable HD */
+	incb 0x0475
+
 	/* save old int 19 */
 	mov (0x19*4), %eax
 	mov %eax, %cs:old_int19
-- 
2.11.4.GIT