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Date: Mon, 14 Mar 2011 16:29:15 +0200
From: Gleb Natapov <gleb@redhat.com>
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Subject: [Qemu-devel] Re: RFC: emulation of system flash
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To: Jordan Justen <jljusten@gmail.com>
Cc: Stefan Hajnoczi <stefanha@gmail.com>, Kevin O'Connor <kevin@koconnor.net>, qemu-devel <qemu-devel@nongnu.org>, Michal Suchanek <hramrach@centrum.cz>, Avi Kivity <avi@redhat.com>

On Fri, Mar 11, 2011 at 01:41:17PM -0800, Jordan Justen wrote:
> On Thu, Mar 10, 2011 at 12:21, Gleb Natapov <gleb@redhat.com> wrote:
> > On Thu, Mar 10, 2011 at 11:50:42AM -0800, Jordan Justen wrote:
> >>
> >> So, perhaps this feature should build upon the other feature you and
> >> Jan are discussing. =9AWhen will it become available?
> >>
> > When somebody will be motivated enough to send patches. If this was the
> > only thing that stands in a way of QEMU having EFI firmware with CSM
> > support it would have happened much faster though.
>=20
> Regarding the read-IO, write-IO, read-RAM, write-RAM slots feature for kv=
m...
>=20
> Unfortunately, this is not much related to the CSM issue.
>=20
> It sounds to me like this feature would be important for a good
> implementation of flash support that covers both qemu & kvm.
>=20
> How big is this task?  How can I find out more to see if I can help?
>=20
Having BIOS (or executable part of a flash) to be mapped as memory and
rest of the flash to be IO does not require any special changes to KVM
or QEMU. This is just a matter of implementing command line parsing and
flash device emulation.

--
			Gleb.