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[Xen-changelog] [xen-3.4-testing] rombios: don't busy-wait for keystroke

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Subject:	[Xen-changelog] [xen-3.4-testing] rombios: don't busy-wait for keystrokes
From:	"Xen patchbot-3.4-testing" <patchbot-3.4-testing@xxxxxxxxxxxxxxxxxxx>
Date:	Fri, 27 Nov 2009 00:40:42 -0800
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# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1259310316 0
# Node ID 6090fa95abc1d430da1532f2a72670138af995ff
# Parent  f937968640d804942d8b779633f9c04045ea1142
rombios: don't busy-wait for keystrokes

Spinning waiting for the keyboard is a bit rude on a virtual
machine. Wait for an interrupt instead.

Signed-off-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
xen-unstable changeset:   20460:c11e2c3df547
xen-unstable date:        Mon Nov 23 06:47:29 2009 +0000
---
 tools/firmware/rombios/rombios.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r f937968640d8 -r 6090fa95abc1 tools/firmware/rombios/rombios.c
--- a/tools/firmware/rombios/rombios.c  Fri Nov 27 08:24:37 2009 +0000
+++ b/tools/firmware/rombios/rombios.c  Fri Nov 27 08:25:16 2009 +0000
@@ -11250,7 +11250,7 @@ int16_wait_for_key:
   cmp  bx, 0x001c
   jne  int16_key_found
   sti
-  nop
+  hlt
 #if 0
                            /* no key yet, call int 15h, function AX=9002 */
   0x50,                    /* push AX */

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