[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH 0 of 6 V6] amd iommu: support ats/gpgpu passthru on iommuv2 systems

On 03/14/2012 03:09 PM, Ian Campbell wrote:
On Thu, 2012-03-08 at 13:21 +0000, Wei Wang wrote:
This is patch set v6. It includes all pending patches that are needed to enable 
gpgpu passthrough

I'm curious, is any of this actually specific to GPGPU passthrough or is
it just that GPGPU passthrough happens to be the main (only?) reason you
would want to expose a virtualised IOMMU to the guest OS? Are there any
other use cases?


For now, gpgpu is the only use case. But actually any sophisticated ats devices that supports PASID and PRI capabilities will need to work with iommuv2 driver in guest OS, so they will also need a virtual iommu in guest space. Please check ats spec 1.1, those capabilities have been documented and they are not specific to GPGPU.


Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.