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

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Date:   Thu, 9 Feb 2023 16:16:55 +0000
From:   Shameerali Kolothum Thodi <shameerali.kolothum.thodi@...wei.com>
To:     Nicolin Chen <nicolinc@...dia.com>
CC:     Yi Liu <yi.l.liu@...el.com>, "joro@...tes.org" <joro@...tes.org>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
        "jgg@...dia.com" <jgg@...dia.com>,
        "kevin.tian@...el.com" <kevin.tian@...el.com>,
        "robin.murphy@....com" <robin.murphy@....com>,
        "cohuck@...hat.com" <cohuck@...hat.com>,
        "eric.auger@...hat.com" <eric.auger@...hat.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "mjrosato@...ux.ibm.com" <mjrosato@...ux.ibm.com>,
        "chao.p.peng@...ux.intel.com" <chao.p.peng@...ux.intel.com>,
        "yi.y.sun@...ux.intel.com" <yi.y.sun@...ux.intel.com>,
        "peterx@...hat.com" <peterx@...hat.com>,
        "jasowang@...hat.com" <jasowang@...hat.com>,
        "lulu@...hat.com" <lulu@...hat.com>,
        "suravee.suthikulpanit@....com" <suravee.suthikulpanit@....com>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "baolu.lu@...ux.intel.com" <baolu.lu@...ux.intel.com>,
        "zhangfei.gao@...aro.org" <zhangfei.gao@...aro.org>
Subject: RE: [PATCH 00/17] Add Intel VT-d nested translation



> -----Original Message-----
> From: Nicolin Chen [mailto:nicolinc@...dia.com]
> Sent: 09 February 2023 16:11
> To: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@...wei.com>
> Cc: Yi Liu <yi.l.liu@...el.com>; joro@...tes.org;
> alex.williamson@...hat.com; jgg@...dia.com; kevin.tian@...el.com;
> robin.murphy@....com; cohuck@...hat.com; eric.auger@...hat.com;
> kvm@...r.kernel.org; mjrosato@...ux.ibm.com;
> chao.p.peng@...ux.intel.com; yi.y.sun@...ux.intel.com; peterx@...hat.com;
> jasowang@...hat.com; lulu@...hat.com; suravee.suthikulpanit@....com;
> iommu@...ts.linux.dev; linux-kernel@...r.kernel.org;
> linux-kselftest@...r.kernel.org; baolu.lu@...ux.intel.com;
> zhangfei.gao@...aro.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