[Spice-devel] Vdagent not working on xen linux hvm DomUs

[Wei Liu]

On Fri, Dec 06, 2013 at 12:15:30PM +0100, Fabio Fantoni wrote:
> Il 06/12/2013 11:50, Wei Liu ha scritto:
> >On Fri, Dec 06, 2013 at 11:15:17AM +0100, Fabio Fantoni wrote:
> >[...]
> >>>>I not mean virtio disk/net but virtio-serial channels used for
> >>>>example by spice vdagent.
> >>>>The libxl implentation xen side is correct and on windows domUs
> >>>>vdagent is working (I'm using it since 2 year).
> >>>>On linux domUs I found that virtio ports under /dev are missed/not
> >>>>created and I not understand why.
> >>>That's probably unplugged by Xen platform PCI device.
> >>>
> >>>>Recently I tried also with xen_platform_pci=0 and the Konrad's patch
> >>>>(xen/pvhvm: If xen_platform_pci=0 is set don't blow up) but to no
> >>>>avail.
> >>>>
> >>>I haven't followed up that patch so I am not sure what's happening.
> >>>
> >>>Wei.
> >>>
> >>>>Thanks for any reply.
> >>I did another tests, adding pci=nomsi to kernel boot option creates
> >>virtio-serial ports correctly and vdagent works also on linux domUs,
> >>I also tried to enable the xen platform and also in that case
> >>vdagent works.
> >>So the problem is only about msi.
> >>Added xen-devel to cc.
> >>Any ideas on how to fix permanently without adding pci=nomsi?
> >>
> >As I remember it I wrote a patch for QEMU to make it capable of
> >injecting MSI interrupt in Xen long time ago so it should work fine.
> >
> >Wei.
> 
> Is this?
> http://git.qemu.org/?p=qemu.git;a=commit;h=f1dbf015dfb0aa7f66f710a1f1bc58b662951de2
> 
> thenis there a xen and/or qemu regression?
> 

Yes that one.

Not sure if it is a regression, because nobody ever tried to use
virtio-serial in Xen AFAICT.

If you find virtio-net / virtio-blk not working, then there's a problem.

Wei.

> >
> >>Thanks for any reply.