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

To: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Subject: Re: [Xen-devel] Re: [PATCH] Replace bios_relocate hook with bios_load hook in hvmloader
From: Keir Fraser <keir.xen@xxxxxxxxx>
Date: Wed, 27 Jul 2011 09:35:22 +0100
Cc: Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Jordan Justen <jljusten@xxxxxxxxx>, Bei Guan <gbtju85@xxxxxxxxx>, Andrei Warkentin <andreiw@xxxxxxxxxxxx>
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Thread-topic: [Xen-devel] Re: [PATCH] Replace bios_relocate hook with bios_load hook in hvmloader
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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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