Re: [PATCH 0/2] graphics passthrough with VT-d / keyboard and mouse sharing patch

[Jean Guyader <jean.guyader@gmail.com>]

On 13 March 2010 00:37, Pasi Kärkkäinen <pasik@iki.fi> wrote:
> On Fri, Aug 28, 2009 at 09:24:31AM +0100, Jean Guyader wrote:
>> On Fri, Aug 28, 2009 at 03:53:56AM -0400, Han, Weidong wrote:
>> > Hi all,
>> >
>> > Recently, more and more people are interesting in gfx passthrough. But now xen-unstable doesn't support it, although some guys (Jean Guyader, Beng Heng, Ng) posted gfx passthrough patches. If xen-unstable includes gfx passthrough support, people can be easy to try it.
>> >
>> > gfx passthrough is more complicated than other PCI device passthrough such as NIC, and is hard to use a generic approach for all gfx passthrough. But there are some necessary changes for gfx passthrough:
>> >   1. disable emulated VGA adapter, instead use passthroughed gfx
>> >   2. load VGA bios of the gfx to guest
>> >   3. passthrough legacy VGA IO ports and MMIOs to guest
>> >
>> > This patchset implements above common changes. Based on the common changes, we are investigating to support more gfx cards and guest OSs. We will post the hacks in future.
>> >
>> > The patchset supports to passthrough the primary gfx and discrete gfx. With the patchset, virtualization friendly gfx cards can be passthroughed (e.g. Nvidia FX3800), IGD and many discrete gfx cards are not supported yet.
>> >
>> > This is easy to use, the only difference from other PCI passthrough is to add following lines to hvm configure file:
>> >
>> > #----------------------------------------------------------------------------------------
>> > # 0: no gfx passthru, 1: IGD passthru, 2: discrete gfx passthru, default is 0
>> > gfx_passthru=2
>> >
>> > and also pls passthrough a USB controller for keyboard/mouse use in guest. (Now there are some issues on USB controller passthrough with pv-ops dom0, so currently prefer to use 2.6.18 dom0.)
>> >
>>
>> Once we have those patch inside xen-unstable, I could commit the patch we have for XCI
>> to share the host keyboard/mouse with multiple vms.
>>
>
> Hello,
>
> I just found this while going through the archives.
>
> Jean:
> I don't remember seeing this keyboard/mouse sharing patch..
> Can you send it now when xen-unstable has graphics passthru support?
>

Hi Pasi,

I didn't post the patch on the mailing list, and in XCI we changed the
way it was working.
When I will have some free time, I will right a more upstreamable version.

Jean