Re: [Qemu-devel] Boot order problem and disable iPXE/gPXE

[Kevin O'Connor <kevin@koconnor.net>]

On Thu, Jan 05, 2012 at 11:20:37AM +0200, Gleb Natapov wrote:
> On Thu, Jan 05, 2012 at 10:09:44AM +0100, Gerhard Wiesinger wrote:
> > But as far as I remember therefore the option ROM registers through
> > BIOS for INT 19h booting. So Seabios should know it that this is a
> > harddisk.
> It registers BEV. Otherwise you wouldn't be able to boot at all. In fact
> it registers multiple BEVs (one for each attached scsi device). But BIOS
> knows nothing about the device behind the BEV. It just jumps to BEV
> address to boot from it when INT 19h is called. There may be scsi cdrom
> there or even tape.

Gerhard's option rom is actually registering a BCV, and SeaBIOS can
know that is likely a hard drive.  So, I think Gerhard has a point.
SeaBIOS could probably fall back to the harddrive priority if it finds
a BCV without an explicit bootindex priority.

Gerhard - does the patch below improve things for you?

-Kevin


--- a/src/boot.c
+++ b/src/boot.c
@@ -326,7 +326,7 @@ boot_add_bev(u16 seg, u16 bev, u16 desc, int prio)
 void
 boot_add_bcv(u16 seg, u16 ip, u16 desc, int prio)
 {
-    bootentry_add(IPL_TYPE_BCV, defPrio(prio, DEFAULT_PRIO)
+    bootentry_add(IPL_TYPE_BCV, defPrio(prio, DefaultHDPrio)
                   , SEGOFF(seg, ip).segoff
                   , desc ? MAKE_FLATPTR(seg, desc) : "Legacy option rom");
 }