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Re: [Xen-devel] [PATCH 1 of 6 V6] amd iommu: Add 2 hypercalls for libxc



Wei Wang writes ("Re: [Xen-devel] [PATCH 1 of 6 V6] amd iommu: Add 2 hypercalls 
for libxc"):
> Well, the hypercall itself is very simple and straightforward. It just 
> allow qemu to notify Xen guest iommu msi configurations. Except this, 
> there is also a need in qemu of registering a virtual iommu device in 
> qemu bus. Since we might not wait upstream qemu for 4.2 release, I would 
> like to suggest that if we could take the qemu patch back to traditional 
> qemu. This will give Xen 4.2 the complete support for iommuv2 no matter 
> how upstream qemu looks like, and will also help Linux distros that will 
> be based on Xen 4.2 to have full iommuv2 support. How do you think about it?

We really are trying to keep qemu-xen-unstable feature frozen.  It is
a shame that the necessary features are still delayed getting into
qemu upstream, which has so far prevented us from switching the
default over.

Ian.
(qemu-devel added to the CC)

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