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

Baolu Lu
2024-11-13T02:56:49Z

On 11/13/24 09:23, Jason Gunthorpe wrote:
>> https://github.com/Linaro/linux-kernel-uadk/tree/6.12-wip
>> https://github.com/Linaro/qemu/tree/6.12-wip
>>
>> Still need this hack
>> https://github.com/Linaro/linux-kernel-uadk/commit/
>> eaa194d954112cad4da7852e29343e546baf8683
>>
>> One is adding iommu_dev_enable/disable_feature IOMMU_DEV_FEAT_SVA,
>> which you have patchset before.
> Yes, I have a more complete version of that here someplace. Need some
> help on vt-d but hope to get that done next cycle.

Can you please elaborate this a bit more? Are you talking about below
change

+ ret = iommu_dev_enable_feature(idev->dev, IOMMU_DEV_FEAT_SVA);
+ if (ret)
+ return ret;

in iommufd_fault_iopf_enable()?

I have no idea about why SVA is affected when enabling iopf.

--
baolu