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

[Gerhard Wiesinger <lists@wiesinger.com>]

On Thu, 5 Jan 2012, Kevin O'Connor wrote:

> 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?

Can confirm, that it works now as expected and boots from SCSI harddisk. 
(boot order=cad,menu=on). Also boot=dca,menu=on boots from CDROM as 
expected. Also when legacy option rom is selected boots from harddisk.

Boot menu looks like
1. #18 ID 00 LUN0 QEMU    QEMU HARDDSISK
2. #18 ID 00 LUN1 QEMU    QEMU HARDDSISK
3. #18 ID 00 LUN2 QEMU    QEMU HARDDSISK
4. #18 ID 00 LUN3 QEMU    QEMU HARDDSISK
5. Legacy option rom
6. DVD/CD [ata1-0: QEMU DVD-ROM ATAPI-4 DVD/CD]
7. iPXE (PCI 00:00.0)

But there is still the iPXE ROM there (I think I didn't see iPXE because 
it is last one displayed and boot screen is fast and will be cleared 
afterwards). So something must be wrong. @Gerd: any ideas?

command line:
/root/download/qemu/git/qemu-kvm/x86_64-softmmu/qemu-system-x86_64
-drive file=1.img,media=disk,if=scsi,bus=0,unit=0
-drive file=2.img,media=disk,if=scsi,bus=0,unit=1
-drive file=3.img,media=disk,if=scsi,bus=0,unit=2
-drive file=4.img,media=disk,if=scsi,bus=0,unit=3 
-cdrom KNOPPIX_V6.2CD-2009-11-18-DE.iso
-boot order=cad,menu=on -m 256 -k de 
-vga vmware -vnc :0 -bios /root/download/seabios/git/seabios/out/bios.bin 
-option-rom 8xx_64.rom
-device rtl8139,mac=1a:46:0b:ca:bc:7c,vlan=0,romfile=
-net tap,ifname=tap0,script=no,downscript=no,vlan=0
-device pcnet,mac=1a:46:0b:ca:bc:7e,vlan=1,romfile=
-net tap,ifname=tap1,script=no,downscript=no,vlan=1

Relevant logs below.

Ciao,
Gerhard

--
http://www.wiesinger.com/

|0ffdf000| Searching bootorder for: /pci@i0cf8/*@1,1/drive@1/disk@0
|0ffdf000| pmm_malloc zone=0x0ffefe30 handle=ffffffff size=20 align=10 ret=0x0ffe15b0 (detail=0x0ffe15d0)
|0ffdf000| Registering bootable: DVD/CD [ata1-0: QEMU DVD-ROM ATAPI-4 DVD/CD] (type:3 prio:103 data:fd940)
Searching bootorder for: /rom@genroms/8xx_64.rom
pmm_malloc zone=0x0ffefe30 handle=ffffffff size=20 align=10 ret=0x0ffe1560 (detail=0x0ffe1580)
Registering bootable: #18 ID00 LUN0 QEMU     QEMU HARDDISK    (type:129 prio:101 data:ca003d4e)
Searching bootorder for: /rom@genroms/8xx_64.rom:rom1
pmm_malloc zone=0x0ffefe30 handle=ffffffff size=20 align=10 ret=0x0ffe1510 (detail=0x0ffe1530)
Registering bootable: #18 ID01 LUN0 QEMU     QEMU HARDDISK    (type:129 prio:101 data:ca003da2)
Searching bootorder for: /rom@genroms/8xx_64.rom:rom2
pmm_malloc zone=0x0ffefe30 handle=ffffffff size=20 align=10 ret=0x0ffe14c0 (detail=0x0ffe14e0)
Registering bootable: #18 ID02 LUN0 QEMU     QEMU HARDDISK    (type:129 prio:101 data:ca003df6)
Searching bootorder for: /rom@genroms/8xx_64.rom:rom3
pmm_malloc zone=0x0ffefe30 handle=ffffffff size=20 align=10 ret=0x0ffe1470 (detail=0x0ffe1490)
Registering bootable: #18 ID03 LUN0 QEMU     QEMU HARDDISK    (type:129 prio:101 data:ca003e4a)
Checking rom 0x000ce000 (sig aa55 size 17)
Searching bootorder for: /rom@genroms/vapic.bin
pmm_malloc zone=0x0ffefe30 handle=ffffffff size=20 align=10 ret=0x0ffe1420 (detail=0x0ffe1440)
Registering bootable: Legacy option rom (type:129 prio:101 data:ce000003)
Checking rom 0x000d0800 (sig aa55 size 5)
Searching bootorder for: /rom@genroms/pxe-pcnet.rom
pmm_malloc zone=0x0ffefe30 handle=ffffffff size=20 align=10 ret=0x0ffe13d0 (detail=0x0ffe13f0)
Registering bootable: iPXE (PCI 00:00.0) (type:128 prio:9999 data:d0800372)
Press F12 for boot menu.

Checking for bootsplash