Re: [Xen-devel] [PATCH 00 of 14 V3] amd iommu: support ATS device passthru on IOMMUv2 systems

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 10.01.12 at 18:07, Wei Wang <wei.wang2@xxxxxxx> wrote:
> Hi all, this is patch v3.
> ATS devices with PRI and PASID capabilities can communicate with iommuv2 to 
> perform two level (nested) address translation and demand paging for DMA. 
> To passthru such devices, iommu driver has to been enabled in guest OS. 
> This patch set adds initial iommu emulation for hvm guests to support ATS 
> device passthru.

I would look into committing 1-6 and 10 (if that one is independent of
7-9), if you can confirm that those on their own provide meaningful
benefit (enabling the ppr log probably is what I'm after, but I'd still
like your confirmation - patch 3 in particular doesn't look very useful
without the later ones). So ideally the ones leading up to the ppr log
enabling would all be first (or even a separate series), and the guest
iommu ones would follow (as those make only sense when the tools
maintainers are okay with the changes too).

Jan

> changes in v3:
> * Use xenstore to receive guest iommu configuration instead of adding in a 
> new field in hvm_info_table.
> * Support pci segment in vbdf to mbdf bind.
> * Make hypercalls visible for non-x86 platforms.
> * A few code cleanups according to comments from Jan and Ian.
> 
> Changes in v2:
> * Do not use linked list to access guest iommu tables.
> * Do not parse iommu parameter in libxl_device_model_info again.
> * Fix incorrect logical calculation in patch 11.
> * Fix hypercall definition for non-x86 systems.
> 
> Thanks,
> Wei




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