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Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 f
From: |
Gerd Hoffmann |
Subject: |
Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD |
Date: |
Mon, 19 May 2014 08:44:47 +0200 |
Hi,
> + /*
> + * Some video bioses and gfx drivers will assume the bdf of IGD is
> 00:02.0.
> + * So user need to set it to 00:02.0 in Xen configure file explicitly,
> + * otherwise IGD will fail to work.
> + */
> + pci_reserve_pci_devfn(b, PCI_DEVFN(2, 0));
That is asking for trouble. Slot 2 is used by the qemu vga cards by
default, and for quite a while (before memory api was merged) it even
was impossible to change it. libvirt still places the vga card at slot
2 for that reason -> boom. I wouldn't be surprised if you find that
assumption in other management libs / apps too.
Why do you need that patch in the first place? It should be possible to
configure qemu to not occupy slot 2 if you need it that way. Just pass
'-vga none' to qemu. Which you probably want anyway if you pass-through
a vga to the guest. And explicitly configure a slot (via addr=
property) for all your pci devices. Doing it only for the IGD works too
if you list the device before any other pci device on the qemu command
line.
cheers,
Gerd
- [Qemu-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, (continued)
- [Qemu-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Tiejun Chen, 2014/05/16
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Konrad Rzeszutek Wilk, 2014/05/16
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Chen, Tiejun, 2014/05/19
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Konrad Rzeszutek Wilk, 2014/05/19
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Chen, Tiejun, 2014/05/20
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Stefano Stabellini, 2014/05/19
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Chen, Tiejun, 2014/05/20
[Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Tiejun Chen, 2014/05/16
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Konrad Rzeszutek Wilk, 2014/05/16
- Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD,
Gerd Hoffmann <=
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Fabio Fantoni, 2014/05/19
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Zhang, Yang Z, 2014/05/19
- Re: [Qemu-devel] [Xen-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, Chen, Tiejun, 2014/05/19
- 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