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Re: [Qemu-devel] Re: [PATCH 2/3] qemu: make cirrus init value pci spec c


From: Gerd Hoffmann
Subject: Re: [Qemu-devel] Re: [PATCH 2/3] qemu: make cirrus init value pci spec compliant
Date: Mon, 12 Oct 2009 17:43:39 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.4pre) Gecko/20090922 Fedora/3.0-2.7.b4.fc11 Lightning/1.0pre Thunderbird/3.0b4

On 10/12/09 16:52, Gleb Natapov wrote:
On Mon, Oct 12, 2009 at 04:50:35PM +0200, Gerd Hoffmann wrote:
pc.c does some magic here to map the complete bios into high memory
and the legacy part at 0xe0000, thats why it is loaded in a
different way. It gets loaded to IO_MEM_ROM memory though, so the
guest should not be able to corrupt it.

But KVM doesn't support it (memory is always writable). And we want to reload
BIOS on reboot for migration purposes.

Then it should be switched over to the new rom loader. Also the logic which does *not* reload stuff which goes to IO_MEM_ROM must be turned off for kvm them.

cheers,
  Gerd





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