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

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

On 03/12/2012 12:25 PM, Ian Jackson wrote:
Wei Wang writes ("Re: [PATCH 1 of 6 V6] amd iommu: Add 2 hypercalls for libxc"):
The former one will be used by qemu. But Ian said we would not add new
features into qemu traditional,,So I am waiting for pci passthru patches
for upstream qemu being accepted and then I coudl send out my qemu
patch. I also had a prove-of-concept patch that was based on the old
qemu. I could rebase and resend it if necessary.


How confident are we that the new hypercall will be needed for
whatever shape of passthough support ends up in upstream qemu ?


Hi Ian,
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?


Xen-devel mailing list



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