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Date: Mon, 12 Oct 2009 16:21:29 +0200
From: Gleb Natapov <gleb@redhat.com>
Subject: Re: [Qemu-devel] Re: [PATCH 2/3] qemu: make cirrus init value pci
	spec compliant
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To: Anthony Liguori <aliguori@us.ibm.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, Avi Kivity <avi@redhat.com>, kvm-devel <kvm@vger.kernel.org>, "Michael S. Tsirkin" <mst@redhat.com>

On Mon, Oct 12, 2009 at 08:44:56AM -0500, Anthony Liguori wrote:
> Gleb Natapov wrote
> >>BTW, I don't think it's write-protected and it probably should be?
> >>
> >AFAIR it is not writable on plain qemu.
> 
> KVM wants it to be writable for the TPR optimization.  Historically,
I don't think so. TPR will work after BIOS will be shadowed. This is simply
KVM shortcoming.

> it was read-only in QEMU but it changed to read-write in order to
I just checked. It is still read-only in QEMU _before_ BIOS is shadowed.

> fake coreboot into thinking that the bios implemented PMM which it
> doesn't.
What is PMM? Post memory manager? How is it related?

--
			Gleb.