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Re: [Xen-devel] [Qemu-devel] [PATCH 2/2] xen:i386:pc_piix: create isa bridge specific to IGD passthrough



On 2014/11/3 19:36, Chen, Tiejun wrote:
On 2014/11/3 19:35, Paolo Bonzini wrote:
On 03/11/2014 08:48, Chen, Tiejun wrote:
I think the point was mostly to reserve 1f to prevent
devices from using it.
As we populate slots in order it doesn't seem to important ...

If we populate slot at !1f GFX driver can't find this ISA bridge.

Right, but I mean if no special options are used, 1f will typically
stay free without any effort on our side.

Yeah.

Actually based on current info we know, seems 1f is just specific to
our
scenario :) So I always think we can occupy that. But Paolo and you can
really determine this point.

What's your idea?

I do not have any objection to always occupying 1f for Xen IGD
passthrough.

After I go back to look at this again, I hope you don't misunderstand what Michael mean now. He was saying we don't need to create a new separate machine specific to IGD passthrough. But that idea is just from you :)

Thanks
Tiejun

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