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

[Jason Gunthorpe <jgg@nvidia.com>]

On Tue, Nov 05, 2024 at 04:48:29PM +0000, Will Deacon wrote:
> Hi Jason,
> 
> On Fri, Nov 01, 2024 at 10:25:03AM -0300, Jason Gunthorpe wrote:
> > On Fri, Nov 01, 2024 at 12:18:50PM +0000, Will Deacon wrote:
> > > On Wed, Oct 30, 2024 at 09:20:44PM -0300, Jason Gunthorpe wrote:
> > > > [This is now based on Nicolin's iommufd patches for vIOMMU and will need
> > > > to go through the iommufd tree, please ack]
> > > 
> > > Can't we separate out the SMMUv3 driver changes? They shouldn't depend on
> > > Nicolin's work afaict.
> > 
> > We can put everything before "iommu/arm-smmu-v3: Support
> > IOMMU_VIOMMU_ALLOC" directly on a rc and share a branch with your tree.
> > 
> > That patch and following all depend on Nicolin's work, as they rely on
> > the VIOMMU due to how different ARM is from Intel.
> > 
> > How about you take these patches:
> > 
> >  [PATCH v4 01/12] vfio: Remove VFIO_TYPE1_NESTING_IOMMU
> >  [PATCH v4 02/12] ACPICA: IORT: Update for revision E.f
> >  [PATCH v4 03/12] ACPI/IORT: Support CANWBS memory access flag
> >  [PATCH v4 04/12] iommu/arm-smmu-v3: Report IOMMU_CAP_ENFORCE_CACHE_COHERENCY for CANWBS
> >  [PATCH v4 05/12] iommu/arm-smmu-v3: Support IOMMU_GET_HW_INFO via struct arm_smmu_hw_info
> >  [PATCH v4 06/12] iommu/arm-smmu-v3: Implement IOMMU_HWPT_ALLOC_NEST_PARENT
> >  [PATCH v4 07/12] iommu/arm-smmu-v3: Expose the arm_smmu_attach interface
> > 
> > Onto a branch.
> 
> I've pushed these onto a new branch in the IOMMU tree:
> 
> 	iommufd/arm-smmuv3-nested
> 
> However, please can you give it a day or two to get some exposure in
> -next before you merge that into iommufd? I'll ping back here later in
> the week.

Thanks, I will hope to put the other parts together on Friday then so
it can also get its time in -next, as we are running out of days
before the merge window

0-day is still complaining about some kconfig in Nicolin's patches so
we need to settle that anyhow.

Jason