From: Kevin O'Connor <kevin@koconnor.net>
Date: Thu, 26 Aug 2010 01:43:19 +0000 (-0400)
Subject: Update qemu_cfg_read to use "rep insb".
X-Git-Tag: rel-0.6.1~6
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=6039fc55274deb7202060d08e0f23b9f3dcface4;p=seabios.git

Update qemu_cfg_read to use "rep insb".

Use rep insb instead of manual loop - the host may be able to optimize
the rep insb instruction.
---

diff --git a/src/paravirt.c b/src/paravirt.c
index da72c71..ca646d4 100644
--- a/src/paravirt.c
+++ b/src/paravirt.c
@@ -24,8 +24,7 @@ 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