Re: [Xen-devel] [Patch][RFC] BIOS: configure bootable pass-through device

[Akio Takebe <takebe_akio@xxxxxxxxxxxxxx>]

Hi,

Keir Fraser wrote:
> On 12/03/2009 10:11, "Akio Takebe" <takebe_akio@xxxxxxxxxxxxxx> wrote:
>
> > These patches use cmos(0x60) as a place retaining the devfn of bootable
> > device.
> > Bochs BIOS doesn't seems to use the offset 0x60.
> > What do you think of using cmos(0x60)?
> > Do you have some ideas?
> This shouldn't need to touch qemu at all. This is a config option that
> should be parsed by xm/xend and passed directly off to hvmloader. Passing it
> via hvm_info_table would make most sense in my opinion. In which case you
> need to probably pass it as an optional param to xc.hvm_build() and poke it
> into hvm_info_table from that Python C wrapper function.
Thank you very much. It looks good.
I'll try it.

> If not specified, should you keep default behaviour and try to load all
> option ROMs? I'm not fussed - it's just a thought.
It depends on bios implimentation, I think.
BIOS on one server box can select bootable device.
BIOS on another box detects some device installed only paticular slots as 
bootable.
There may be a BIOS loding all option ROM.
With avobe your idea, I want to think a little bits more.
I want to load option ROMs with a order like BCV priority.

Best Regards,

Akio Takebe

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