Crash when booting from SCSI disk using Grub

Crash when booting from SCSI disk using Grub

[Alberto Treviño]

When I try to boot from a SCSI device using grub, Qemu crashes (see 
below).  I have been able to boot from SCSI devices using Windows, but 
anytime I use grub I get a crash, even when booting off a CD with grub.  
Any ideas?

# qemu-system-x86_64 -drive \
  file=junk.raw,if=scsi,bus=0,index=0,media=disk,boot=on \
  -cdrom /srv/vm/.kvm/install/slim-cd-v4.iso -boot d \
  -m 64 -vnc :0
exception 13 (33)
rax 0000000000000000 rbx 0000000000000800 rcx 0000000000000000 rdx 
00000000000000e0
rsi 00000000ffff7d98 rdi 000000000008f788 rsp 0000000000002018 rbp 
0000000000000001
r8  0000000000000000 r9  0000000000000000 r10 0000000000000000 r11 
0000000000000000
r12 0000000000000000 r13 0000000000000000 r14 0000000000000000 r15 
0000000000000000
rip 0000000000000003 rflags 00033202
cs 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
ds 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
es 0800 (00008000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
ss 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
fs 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
gs 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
tr 0000 (fffbd000/00002088 p 1 dpl 0 db 0 s 0 type b l 0 g 0 avl 0)
ldt 0000 (00000000/0000ffff p 1 dpl 0 db 0 s 0 type 2 l 0 g 0 avl 0)
gdt fb1f2/30
idt 0/3ff
cr0 10 cr2 0 cr3 0 cr4 0 cr8 0 efer 0
code: 53 ff 00 --> f0 53 ff 00 f0 53 ff 00 f0 53 ff 00 f0 53 ff 00 f0 53 
ff 00 f0 53 ff 00 f0 53 ff 00 f0 a5 fe 00 f0 87 e9 00 f0 53 ff 00 f0 53 
ff 00 f0 53 ff
Aborted

-- 
Alberto Treviño
alberto@byu.edu

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Re: Crash when booting from SCSI disk using Grub

[Anthony Liguori]

Alberto Treviño wrote:
> When I try to boot from a SCSI device using grub, Qemu crashes (see 
> below).  I have been able to boot from SCSI devices using Windows, but 
> anytime I use grub I get a crash, even when booting off a CD with grub.  
> Any ideas?
>
> # qemu-system-x86_64 -drive \
>   file=junk.raw,if=scsi,bus=0,index=0,media=disk,boot=on \
>   -cdrom /srv/vm/.kvm/install/slim-cd-v4.iso -boot d \
>   -m 64 -vnc :0
>   

You aren't booting from SCSI, you're booting from a CDROM.

Does the problem still exist if you omit ,boot=on?  My suspicion is that 
you're seeing the classic big real mode problem.  What guest are you 
trying to install?

Regards,

Anthony Liguori

> exception 13 (33)
> rax 0000000000000000 rbx 0000000000000800 rcx 0000000000000000 rdx 
> 00000000000000e0
> rsi 00000000ffff7d98 rdi 000000000008f788 rsp 0000000000002018 rbp 
> 0000000000000001
> r8  0000000000000000 r9  0000000000000000 r10 0000000000000000 r11 
> 0000000000000000
> r12 0000000000000000 r13 0000000000000000 r14 0000000000000000 r15 
> 0000000000000000
> rip 0000000000000003 rflags 00033202
> cs 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
> ds 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
> es 0800 (00008000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
> ss 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
> fs 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
> gs 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
> tr 0000 (fffbd000/00002088 p 1 dpl 0 db 0 s 0 type b l 0 g 0 avl 0)
> ldt 0000 (00000000/0000ffff p 1 dpl 0 db 0 s 0 type 2 l 0 g 0 avl 0)
> gdt fb1f2/30
> idt 0/3ff
> cr0 10 cr2 0 cr3 0 cr4 0 cr8 0 efer 0
> code: 53 ff 00 --> f0 53 ff 00 f0 53 ff 00 f0 53 ff 00 f0 53 ff 00 f0 53 
> ff 00 f0 53 ff 00 f0 53 ff 00 f0 a5 fe 00 f0 87 e9 00 f0 53 ff 00 f0 53 
> ff 00 f0 53 ff
> Aborted
>
>   


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