linux-kernel - Re: [RFC 0/7] vdpa: Add support for iommufd

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Message-ID: <20231026024931-mutt-send-email-mst@kernel.org>
Date:   Thu, 26 Oct 2023 02:49:44 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Cindy Lu <lulu@...hat.com>
Cc:     jasowang@...hat.com, yi.l.liu@...el.com, jgg@...dia.com,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: Re: [RFC 0/7] vdpa: Add support for iommufd

On Thu, Oct 26, 2023 at 02:48:07PM +0800, Cindy Lu wrote:
> On Thu, Oct 26, 2023 at 2:42 PM Michael S. Tsirkin <mst@...hat.com> wrote:
> >
> > On Sun, Sep 24, 2023 at 01:05:33AM +0800, Cindy Lu wrote:
> > > Hi All
> > > Really apologize for the delay, this is the draft RFC for
> > > iommufd support for vdpa, This code provides the basic function
> > > for iommufd support
> > >
> > > The code was tested and passed in device vdpa_sim_net
> > > The qemu code is
> > > https://gitlab.com/lulu6/gitlabqemutmp/-/tree/iommufdRFC
> > > The kernel code is
> > > https://gitlab.com/lulu6/vhost/-/tree/iommufdRFC
> > >
> > > ToDo
> > > 1. this code is out of date and needs to clean and rebase on the latest code
> > > 2. this code has some workaround, I Skip the check for
> > > iommu_group and CACHE_COHERENCY, also some misc issues like need to add
> > > mutex for iommfd operations
> > > 3. only test in emulated device, other modes not tested yet
> > >
> > > After addressed these problems I will send out a new version for RFC. I will
> > > provide the code in 3 weeks
> >
> > What's the status here?
> >
> Hi Michael
> The code is finished, but I found some bug after adding the support for ASID,
> will post the new version after this bug is fixed, should be next week
> Thanks
> Cindy


We'll miss this merge window then.

> > --
> > MST
> >