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

Jason Gunthorpe
2024-11-13T01:24:04Z

On Wed, Nov 13, 2024 at 09:01:41AM +0800, Zhangfei Gao wrote:
> On Wed, 13 Nov 2024 at 02:29, Jason Gunthorpe <jgg@nvidia.com> wrote:
> >
> > On Wed, Oct 30, 2024 at 09:20:44PM -0300, Jason Gunthorpe wrote:
> > > Jason Gunthorpe (7):
> > > iommu/arm-smmu-v3: Support IOMMU_DOMAIN_NESTED
> > > iommu/arm-smmu-v3: Use S2FWB for NESTED domains
> > > iommu/arm-smmu-v3: Allow ATS for IOMMU_DOMAIN_NESTED
> > >
> > > Nicolin Chen (5):
> > > iommu/arm-smmu-v3: Support IOMMU_VIOMMU_ALLOC
> > > iommu/arm-smmu-v3: Support IOMMU_HWPT_INVALIDATE using a VIOMMU object
> >
> > Applied to iommufd for-next along with all the dependencies and the
> > additional hunk Zhangfei pointed out.
>
> Thanks Jason, I have verified on aarch64 based on your
> jason/smmuv3_nesting branch

Great, thanks

> 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.

> The other is to temporarily ignore S2FWB or CANWBS.

Yes, ideally you should do that in the device FW, or perhaps via the
Linux ACPI patching?

Jason