Re: [PATCH v4 00/12] Initial support for SMMUv3 nested translation

Baolu Lu
2025-02-05T03:45:25Z

On 2025/1/23 3:26, Jason Gunthorpe wrote:
> On Fri, Nov 15, 2024 at 01:55:22PM -0400, Jason Gunthorpe wrote:
>>>> I need your help to remove IOMMU_DEV_FEAT_IOPF from the intel
>>>> driver. I have a patch series that eliminates it from all the other
>>>> drivers, and I wrote a patch to remove FEAT_SVA from intel..
>>> Yes, sure. Let's make this happen in the next cycle.
>>>
>>> FEAT_IOPF could be removed. IOPF manipulation can be handled in the
>>> domain attachment path. A per-device refcount can be implemented. This
>>> count increments with each iopf-capable domain attachment and decrements
>>> with each detachment. PCI PRI is enabled for the first iopf-capable
>>> domain and disabled when the last one is removed. Probably we can also
>>> solve the PF/VF sharing PRI issue.
>> Here is what I have so far, if you send me a patch for vt-d to move
>> FEAT_IOPF into attach as you describe above (see what I did to arm for
>> example), then I can send it next cycle
>>
>> https://github.com/jgunthorpe/linux/commits/iommu_no_feat/
> Hey Baolu, a reminder on this, lets try for it next cycle?

Oh, I forgot this. Thanks for the reminding. Sure, let's try to make it
in the next cycle.

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baolu