From patchwork Tue Nov  3 06:02:23 2009
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Subject: PC machine types switched to SeaBIOS/gPXE
Date: Mon, 02 Nov 2009 20:02:23 -0000
From: Kevin O'Connor <kevin@koconnor.net>
X-Patchwork-Id: 37487
Message-Id: <20091103060223.GB13492@morn.localdomain>
To: Avi Kivity <avi@redhat.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
 Gleb Natapov <gleb@redhat.com>

On Tue, Nov 03, 2009 at 07:01:52AM +0200, Avi Kivity wrote:
> That works too, but if firmware config can use rep/ins, that's one less  
> interface we have to add.

The following patch to seabios seems to work.  I'm not sure if there
are any special implications to qemu.

-Kevin


--- a/src/paravirt.c
+++ b/src/paravirt.c
@@ -23,8 +23,7 @@ qemu_cfg_select(u16 f)
 static void
 qemu_cfg_read(u8 *buf, int len)
 {
-    while (len--)
-        *(buf++) = inb(PORT_QEMU_CFG_DATA);
+    insb(PORT_QEMU_CFG_DATA, buf, len);
 }
 
 static void