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Date: Mon, 21 Mar 2011 14:31:24 -0700
Message-ID: <AANLkTi=git0nJq_v0DY_JTV7KUGisLsGTeLq7Er3SiQg@mail.gmail.com>
Subject: Re: [Qemu-devel] OVMF, SeaBIOS & non-CSM based legacy boot
From: Jordan Justen <jljusten@gmail.com>
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To: Michael Brown <mbrown@fensystems.co.uk>
Cc: Stefan Hajnoczi <stefanha@gmail.com>, qemu-devel <qemu-devel@nongnu.org>

On Mon, Mar 21, 2011 at 14:17, Michael Brown <mbrown@fensystems.co.uk> wrot=
e:
> On Monday 21 Mar 2011 21:06:24 Stefan Hajnoczi wrote:
>> On Mon, Mar 21, 2011 at 6:27 PM, Anthony Liguori <anthony@codemonkey.ws>
>> > Is there gPXE for UEFI yet?
>>
>> I have never tried it myself, but I think it should work. =A0CCed
>> Michael Brown to check.
>
> Yes, iPXE for UEFI exists and works. =A0Last tested by me about a week ag=
o, on
> various IBM UEFI systems.
>
> Compared to a "legacy" BIOS network boot, you can't do anything very
> interesting with UEFI. =A0Features such as iSCSI, FCoE, AoE, HTTP all wor=
k with
> a "legacy" BIOS but not with UEFI. =A0A "legacy" BIOS network boot allows=
 you to
> boot an operating system; a UEFI network boot only allows you to boot an =
EFI
> executable (which could be a second-stage OS loader).

Your input on network boot is much more valuable than mine.  (I'm
certainly no expert here...)

But, for a UEFI system, loading a UEFI executable is equivalent to
starting the OS.  Whether that executable is a second stage loader, or
contains the OS kernel, it up to the OS implementation.

-Jordan