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Subject: Re: [Qemu-devel] Are there any IOMMU emulation in QEMU for x86
	platform
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To: "Jiang, Yunhong" <yunhong.jiang@intel.com>
Cc: "eduard.munteanu@linux360.ro" <eduard.munteanu@linux360.ro>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, "david@gibson.dropbear.id.au" <david@gibson.dropbear.id.au>

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