From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wei Wang <wei.wang2@amd.com>
Subject: Re: [PATCH 1 of 6 V6] amd iommu: Add 2 hypercalls for
	libxc
Date: Thu, 8 Mar 2012 15:18:40 +0100
Message-ID: <4F58BFC0.6070506@amd.com>
References: <patchbomb.1331212907@gran.amd.com>
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To: Jan Beulich <JBeulich@suse.com>
Cc: keir@xen.org, xen-devel@lists.xensource.com, Ian.Jackson@eu.citrix.com, Ian.Campbell@citrix.com
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On 03/08/2012 02:35 PM, Jan Beulich wrote:
>>>> On 08.03.12 at 14:21, Wei Wang<wei.wang2@amd.com>  wrote:
>> # HG changeset patch
>> # User Wei Wang<wei.wang2@amd.com>
>> # 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