Re: [PATCH] Fix network boot whether KVM is enabled or disabled

[Anthony Liguori <anthony-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>]

On Thu, 2007-08-23 at 12:08 -0700, Chuan-kai Lin wrote:
> On 8/22/07, Anthony Liguori <anthony-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org> wrote:
> > Hrm, it looks like it's the BIOS.  Using the BIOS in qemu-0.9.0, -boot n works with
> > x86_64 but the bios installed by KVM doesn't work.
> 
> Yeah, it does seem to be the case.  I ran a few experiments after
> reading your message: kvm-28 and kvm-36 successfully PXE-boots when
> using bios.bin from kvm-28, but both fails to PXE-boot when using
> bios.bin from kvm-36.
> 
> > Can you try a more recent KVM with -no-kvm?
> 
> Using the patch I posted to the list, I can PXE-boot using the
> qemu-system-x86_64 executable from kvm-36 both with and without kvm
> kernel module acceleration (provided that I use the bios from kvm-28,
> that is).

Only with the old BIOS right?  The new BIOS provides very limited
support for plug-and-play option ROMs.  This needs to be indicated in
CMOS memory.  This morning I made a quick attempt to change the CMOS
boot value to 0x04 which would indicate booting from an expansion ROM
but that didn't work.  There was a patch on qemu-devel recently that
might be worth looking at.

Regards,

Anthony Liguori

> Regards,
> 


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