From mboxrd@z Thu Jan  1 00:00:00 1970
From: Anthony Liguori <aliguori@us.ibm.com>
Subject: Re: Re: [PATCH 2/3] qemu: make cirrus init value pci
	spec compliant
Date: Mon, 12 Oct 2009 08:44:56 -0500
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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>
To: Gleb Natapov <gleb@redhat.com>
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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, it 
was read-only in QEMU but it changed to read-write in order to fake 
coreboot into thinking that the bios implemented PMM which it doesn't.

-- 
Regards,

Anthony Liguori