Re: [Xen-devel] Re: [PATCH] Replace bios_relocate hook with bios_load hook in hvmloader

[Keir Fraser <keir.xen@xxxxxxxxx>]

On 27/07/2011 09:09, "Tim Deegan" <Tim.Deegan@xxxxxxxxxx> wrote:

> At 08:34 +0100 on 27 Jul (1311755670), Keir Fraser wrote:
>> By the way, what are the advantages for us of supporting OVMF? I know it
>> gets us the UEFI support tickybox, but for me that begs the same question.
>> Why is it useful?
> 
> When Windows boots from UEFI it can load just its system-disk driver via
> the firmware and the rest of the OS using its own driver; that ought to
> make Windows boot times much faster.

That's interesting. Why can't it do that with legacy firmware? Does it need
to keep the legacy BIOS alive for a while and hence can't use its own
drivers, or something like that?

 -- Keir

> I'm told that an EFI framebuffer
> could make PV graphics easier too, but I don't know anything about
> Windows graphics drivers.
> 
> Also, eventually some server SKUs may go EFI-only, or we may need EFI
> for system logo tests, but that seems unlikely to happen soon.
> 
> Tim.



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