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Date: Thu, 7 Apr 2011 12:47:32 -0700
Message-ID: <BANLkTimz7narUQ-Jihy=A+N+ovEkB5dYRQ@mail.gmail.com>
Subject: Re: [Qemu-devel] How does the QEMU load the binary files bios.bin and
	vgabios-cirrus.bin?
From: Jordan Justen <jljusten@gmail.com>
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To: Anthony Liguori <anthony@codemonkey.ws>
Cc: QEMU Developers <qemu-devel@nongnu.org>, Bei Guan <gbtju85@gmail.com>, Gleb Natapov <gleb@redhat.com>, kvm-devel <kvm@vger.kernel.org>

On Thu, Apr 7, 2011 at 12:21, Anthony Liguori <anthony@codemonkey.ws> wrote=
:
> QEMU does the leg work already to support SMM. =A0It doesn't work with KV=
M
> because we treat SMM as ROM memory and trap read/write access.
>
> To make it work with KVM, you'd have to hack things around to switch the =
VGA
> space to RAM in order to the let the SMM code run. =A0It's not impossible=
, but
> that's the main reason it doesn't Just Work.

Ah, SMM ASEG/BSEG?  I think most recent firmware ignore that, use TSEG
(some higher up memory) and run in protected mode.

But, based on Gleb's other response, there are other, bigger issues as well=
...

-Jordan