[Qemu-devel] Re: [PATCHv2-repost] pcbios: enable io/memory unconditionally

[Avi Kivity]

On 11/30/2009 06:00 PM, Anthony Liguori wrote:
> Michael S. Tsirkin wrote:
> > On Thu, Oct 08, 2009 at 05:52:56PM +0200, Michael S. Tsirkin wrote:
> > VGA adapters need to claim memory and i/o
> > transactions even if they do not have any
> > i/o or memory bars. E.g. PCI spec, page 297,
> > gives an example of such a device:
> >
> >         Programming interface 0000 0000b
> >         VGA-compatible controller. Memory
> >         addresses 0A 0000h through 0B
> >         FFFFh. I/O addresses 3B0h to 3BBh
> >         and 3C0h to 3DFh and all aliases of
> >         these addresses.
> >
> > While we could check for these devices and special-case them, it is
> > easier to fix this by enabling i/o and memory space unconditionally:
> > devices that do not support it will just ignore this setting.
> >
> > Signed-off-by: Michael S. Tsirkin <address@hidden>
>
> This is for stable?

This is for qemu-kvm.git to get pcbios consistent with seabios.

> > ---
> >
> > This patch is needed for qemu-kvm as that is still using pcbios.
>
> Why hasn't qemu-kvm switched to seabios?

Regressions.  AFAICT all have been fixed now, and the switch is imminent.

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