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

[Wei Wang <wei.wang2@xxxxxxx>]

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?
>
> Jan
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.
http://lists.xen.org/archives/html/xen-devel/2011-12/msg01269.html

thanks,

Wei


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