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

Shameerali Kolothum Thodi
2023-02-09T16:17:06Z

> -----Original Message-----
> From: Nicolin Chen [mailto:nicolinc@nvidia.com]
> Sent: 09 February 2023 16:11
> To: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>
> Cc: Yi Liu <yi.l.liu@intel.com>; joro@8bytes.org;
> alex.williamson@redhat.com; jgg@nvidia.com; kevin.tian@intel.com;
> robin.murphy@arm.com; cohuck@redhat.com; eric.auger@redhat.com;
> kvm@vger.kernel.org; mjrosato@linux.ibm.com;
> chao.p.peng@linux.intel.com; yi.y.sun@linux.intel.com; peterx@redhat.com;
> jasowang@redhat.com; lulu@redhat.com; suravee.suthikulpanit@amd.com;
> iommu@lists.linux.dev; linux-kernel@vger.kernel.org;
> linux-kselftest@vger.kernel.org; baolu.lu@linux.intel.com;
> zhangfei.gao@linaro.org
> Subject: Re: [PATCH 00/17] Add Intel VT-d nested translation
>
> 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 for that update. Sure, looking forward to it.

Shameer