[Spice-devel] [PATCH] Allow Qemu to pass maximum head to guest

[Marc-André Lureau]

On Mon, Jun 8, 2015 at 7:24 PM, Frediano Ziglio <fziglio at redhat.com> wrote:

> Hi,
>   the idea behind this is to be able from libvirt to set the number of
> heads.
> Other cards (like vmware) support this "heads" setting.
> Actually is expected to work with QXL using Windows guest as in this
> configuration every libvirt head will have a separate video card in the
> guest.
> QXL/Linux depends on configurations. Userspace driver uses min(16, X
> setting default 4) while kernel will use a parameter (by defaults 4). I
> have patches for both userspace driver and kms/drm.
> It's quite hard to pass this limit from libvirt (you have also to consider
> changing configuration after installation) for all guests. Actually there
> is no way for Qemu to enforce this limit (so yes, is an hint).
> This change is a bit different from previous ones as instead of requiring
> a pci revision boost to add a field just use a flag. I tested and is back
> compatible.
>

ok, that looks reasonable to me, looking forward for the rest of the patches


-- 
Marc-André Lureau
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