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Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 f
From: |
Chen, Tiejun |
Subject: |
Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD |
Date: |
Thu, 22 May 2014 06:18:34 +0000 |
> -----Original Message-----
> From: Gerd Hoffmann [mailto:address@hidden
> Sent: Thursday, May 22, 2014 1:40 PM
> To: Chen, Tiejun
> Cc: Anthony PERARD; Daniel P. Berrange; address@hidden;
> address@hidden; address@hidden;
> address@hidden; Kay, Allen M; address@hidden;
> address@hidden; Zhang, Yang Z; address@hidden
> Subject: Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve
> 00:02.0 for INTEL IGD
>
> Hi,
>
> > > According to our discussions, I realize we may have some plans or
> > > policies dedicated to how to assign devfn, but to support GFX
> > > passthrough for XEN, I think currently it may be a better solution to
> > > adopt
> #1 simply like this:
> > >
> > > diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index
> > > eaf3e61..500b3c2
> > > 100644
> > > --- a/hw/i386/pc_piix.c
> > > +++ b/hw/i386/pc_piix.c
> > > @@ -386,7 +386,7 @@ static void
> pc_xen_hvm_init(QEMUMachineInitArgs
> > > *args)
> > >
> > > bus = pci_find_primary_bus();
> > > if (bus != NULL) {
> > > - pci_create_simple(bus, -1, "xen-platform");
> > > + pci_create_simple(bus, PCI_DEVFN(3,0), "xen-platform");
> > > }
> > > }
> > > #endif
> > >
> > > Then we can go out to plan how to assign devfn in common, is this fine?
>
> Somewhere else in the thread someone listed a libxl config file snippet which
> is
> supposed to disable the xen platform device. Which doesn't work with
> upstream qemu for some reason.
>
> Searching ... ah, here:
> http://lists.gnu.org/archive/html/qemu-devel/2014-05/msg03996.html
>
> So, how about making "xen_platform_pci=0" working correctly ?
Yes, this is exactly what I did as Anthony told me to add these two lines:
> xen_platform_pci=0
> device_model_args_hvm = [ '-device', 'xen-platform,addr=0x3' ]
But also as I already reply to Anthony yesterday, this doesn't work
http://lists.gnu.org/archive/html/qemu-devel/2014-05/msg04101.html
I think this only work with some legacy xen/qemu which don't introduce to
support ACPI pcihp.
>
> Another useful thing would be to not create the xen platform device in case
> "-nodefaults" was specified on the command line (that switch turns off a bunch
> of other devices present by default: vga, nic, cdrom, ...).
>
Currently looks 'xen-platform' itself can't be created, not those devices
existed on that.
Thanks
Tiejun
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, (continued)
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Michael S. Tsirkin, 2014/05/19
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Chen, Tiejun, 2014/05/20
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Michael S. Tsirkin, 2014/05/20
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Gerd Hoffmann, 2014/05/19
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Chen, Tiejun, 2014/05/19
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Gerd Hoffmann, 2014/05/19
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Daniel P. Berrange, 2014/05/19
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Chen, Tiejun, 2014/05/21
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Chen, Tiejun, 2014/05/21
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Gerd Hoffmann, 2014/05/22
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD,
Chen, Tiejun <=
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Gerd Hoffmann, 2014/05/22
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Michael S. Tsirkin, 2014/05/22
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Chen, Tiejun, 2014/05/22
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Chen, Tiejun, 2014/05/22
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Gonglei (Arei), 2014/05/22
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Gerd Hoffmann, 2014/05/22
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Chen, Tiejun, 2014/05/22
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Michael S. Tsirkin, 2014/05/22
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Igor Mammedov, 2014/05/22
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Chen, Tiejun, 2014/05/22