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Re: [Qemu-devel] [RFC] Device isolation infrastructure v2
From: |
David Woodhouse |
Subject: |
Re: [Qemu-devel] [RFC] Device isolation infrastructure v2 |
Date: |
Mon, 19 Dec 2011 15:46:38 +0000 |
On Mon, 2011-12-19 at 11:11 +1100, David Gibson wrote:
> They have no inbuilt concept
> of domains (though we could fake in software in some circumstances).
That sentence doesn't make much sense to me.
Either you're saying that every device behind a given IOMMU is in *one*
domain (i.e. there's one domain per PCI host bridge), or you're saying
that each device has its *own* domain (maximum isolation, but still
perhaps not really true if you end up with PCIe-to-PCI bridges or broken
hardware such as the ones we've been discovering, where multifunction
devices do their DMA from the wrong function).
Either way, you *do* have domains. You just might not have thought about
it before.
--
dwmw2
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- Re: [Qemu-devel] [RFC] Device isolation infrastructure v2, (continued)
- Re: [Qemu-devel] [RFC] Device isolation infrastructure v2, Joerg Roedel, 2011/12/16
- Re: [Qemu-devel] [RFC] Device isolation infrastructure v2, David Gibson, 2011/12/18
- Re: [Qemu-devel] [RFC] Device isolation infrastructure v2, Joerg Roedel, 2011/12/19
- Re: [Qemu-devel] [RFC] Device isolation infrastructure v2, David Gibson, 2011/12/20
- Re: [Qemu-devel] [RFC] Device isolation infrastructure v2, Alex Williamson, 2011/12/20
- Re: [Qemu-devel] [RFC] Device isolation infrastructure v2, Aaron Fabbri, 2011/12/21
- Re: [Qemu-devel] [RFC] Device isolation infrastructure v2, Joerg Roedel, 2011/12/21
- Re: [Qemu-devel] [RFC] Device isolation infrastructure v2,
David Woodhouse <=
- Re: [Qemu-devel] [RFC] Device isolation infrastructure v2, David Gibson, 2011/12/19
- Re: [Qemu-devel] [RFC] Device isolation infrastructure v2, David Woodhouse, 2011/12/19
- Re: [Qemu-devel] [RFC] Device isolation infrastructure v2, David Gibson, 2011/12/19