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Re: [Qemu-devel] Are there any IOMMU emulation in QEMU for x86 platform
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] Are there any IOMMU emulation in QEMU for x86 platform |
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Date: |
Tue, 19 Nov 2013 10:13:49 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130923 Thunderbird/17.0.9 |
Il 19/11/2013 07:34, Jiang, Yunhong ha scritto:
> Hi, all
> I noticed there are several patchset has been sent out about IOMMU emulation
> like
> http://lists.gnu.org/archive/html/qemu-devel/2011-10/msg03764.html,
> http://lists.gnu.org/archive/html/qemu-devel/2011-01/msg03196.html .
> Also I noticed that PPC platform has IOMMU emulation support in QEMU
> already. Are there any plan to support IOMMU emulation in QEMU for x86 now?
Not that I know of. Of course, patches are welcome.
> And also, does it requires the real host platform have the IOMMU to
> support the QEMU IOMMU emulation? Or it will be a purely software emulation?
For emulated devices it could be purely software. Nested device
assignment would require a host IOMMU, and would require the host IOMMU
driver to do some kind of shadow-paging.
Paolo