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

On 03/08/2012 02:35 PM, Jan Beulich wrote:
On 08.03.12 at 14:21, Wei Wang<wei.wang2@xxxxxxx>  wrote:
# HG changeset patch
# User Wei Wang<wei.wang2@xxxxxxx>
# Date 1331210211 -3600
# Node ID 810296995a893c1bec898a366f08520fbae755fb
# Parent  f611200469159a960c3f0b975aa0f91ec768e29f
amd iommu: Add 2 hypercalls for libxc

iommu_set_msi: used by qemu to inform hypervisor iommu vector number in
guest space. Hypervisor needs this vector to inject msi into guest after
writing PPR logs back to guest.

iommu_bind_bdf: used by xl to bind virtual bdf to machine bdf for passthru
devices. IOMMU emulator receives iommu cmd from guest OS and then forwards
them to host iommu. Virtual device ids in guest iommu commands must be
converted into physical ids before sending them to real hardware.

So patch 5 uses the latter one, but the former one is still dead code?


Hi Jan,
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.




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