Re: [PATCH 00/17] Add Intel VT-d nested translation

[Nicolin Chen]

Hi Shameer,

On Thu, Feb 09, 2023 at 10:11:42AM +0000, Shameerali Kolothum Thodi wrote:

> > This series first introduces new iommu op for allocating domains for
> > iommufd,
> > and op for syncing iotlb for first stage page table modifications, and then
> > add the implementation of the new ops in intel-iommu driver. After this
> > preparation, adds kernel-managed and user-managed hw_pagetable
> > allocation for
> > userspace. Last, add self-test for the new ioctls.
> >
> > This series is based on "[PATCH 0/6] iommufd: Add iommu capability
> > reporting"[1]
> > and Nicolin's "[PATCH v2 00/10] Add IO page table replacement support"[2].
> > Complete
> > code can be found in[3]. Draft Qemu code can be found in[4].
> >
> > Basic test done with DSA device on VT-d. Where the guest has a vIOMMU
> > built
> > with nested translation.

> Thanks for sending this out. Will go through this one. As I informed before we keep
> an internal branch based on your work and rebase few patches to get the ARM
> SMMUv3 nesting support. The recent one is based on your "iommufd-v6.2-rc4-nesting"
> branch and is here,
> 
> https://github.com/hisilicon/kernel-dev/commits/iommufd-v6.2-rc4-nesting-arm
> 
> Just wondering any chance the latest "Add SMMUv3 nesting support" series will
> be send out soon? Please let me know if you need any help with that.

I had an initial discussion with Robin/Jason regarding the SMMUv3
nesting series, and I received quite a few inputs so I'd need to
finish reworking before sending out -- hopefully we can see them
in the maillist in the following weeks.

Thanks
Nic