From: "Michael S. Tsirkin" <mst@redhat•com>
To: Jason Wang <jasowang@redhat•com>
Cc: Tiwei Bie <tiwei.bie@intel•com>,
linux-kernel@vger•kernel.org, kvm@vger•kernel.org,
virtualization@lists•linux-foundation.org,
netdev@vger•kernel.org, shahafs@mellanox•com, jgg@mellanox•com,
rob.miller@broadcom•com, haotian.wang@sifive•com,
eperezma@redhat•com, lulu@redhat•com, parav@mellanox•com,
rdunlap@infradead•org, hch@infradead•org, jiri@mellanox•com,
hanand@xilinx•com, mhabets@solarflare•com,
maxime.coquelin@redhat•com, lingshan.zhu@intel•com,
dan.daly@intel•com, cunming.liang@intel•com,
zhihong.wang@intel•com
Subject: Re: [PATCH] vhost: introduce vDPA based backend
Date: Wed, 5 Feb 2020 00:31:18 -0500 [thread overview]
Message-ID: <20200205003048-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <798e5644-ca28-ee46-c953-688af9bccd3b@redhat.com>
On Wed, Feb 05, 2020 at 11:12:21AM +0800, Jason Wang wrote:
>
> On 2020/2/5 上午10:05, Tiwei Bie wrote:
> > On Tue, Feb 04, 2020 at 02:46:16PM +0800, Jason Wang wrote:
> > > On 2020/2/4 下午2:01, Michael S. Tsirkin wrote:
> > > > On Tue, Feb 04, 2020 at 11:30:11AM +0800, Jason Wang wrote:
> > > > > 5) generate diffs of memory table and using IOMMU API to setup the dma
> > > > > mapping in this method
> > > > Frankly I think that's a bunch of work. Why not a MAP/UNMAP interface?
> > > >
> > > Sure, so that basically VHOST_IOTLB_UPDATE/INVALIDATE I think?
> > Do you mean we let userspace to only use VHOST_IOTLB_UPDATE/INVALIDATE
> > to do the DMA mapping in vhost-vdpa case? When vIOMMU isn't available,
> > userspace will set msg->iova to GPA, otherwise userspace will set
> > msg->iova to GIOVA, and vhost-vdpa module will get HPA from msg->uaddr?
> >
> > Thanks,
> > Tiwei
>
>
> I think so. Michael, do you think this makes sense?
>
> Thanks
to make sure, could you post the suggested argument format for
these ioctls?
>
> >
> > > Thanks
> > >
> > >
next prev parent reply other threads:[~2020-02-05 5:39 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-31 3:36 [PATCH] vhost: introduce vDPA based backend Tiwei Bie
2020-01-31 3:56 ` Randy Dunlap
2020-01-31 5:12 ` Randy Dunlap
2020-01-31 5:54 ` Tiwei Bie
2020-01-31 5:52 ` Tiwei Bie
2020-02-04 3:30 ` Jason Wang
2020-02-04 6:01 ` Michael S. Tsirkin
2020-02-04 6:46 ` Jason Wang
2020-02-05 2:05 ` Tiwei Bie
2020-02-05 3:12 ` Jason Wang
2020-02-05 5:31 ` Michael S. Tsirkin [this message]
2020-02-05 5:50 ` Jason Wang
2020-02-05 6:30 ` Michael S. Tsirkin
2020-02-05 6:49 ` Jason Wang
2020-02-05 7:16 ` Michael S. Tsirkin
2020-02-05 7:42 ` Jason Wang
2020-02-05 9:22 ` Michael S. Tsirkin
2020-02-05 2:02 ` Tiwei Bie
2020-02-05 3:11 ` Jason Wang
2020-02-05 7:15 ` Shahaf Shuler
2020-02-05 7:50 ` Jason Wang
2020-02-05 9:23 ` Michael S. Tsirkin
2020-02-06 3:07 ` Jason Wang
2020-02-05 9:30 ` Shahaf Shuler
2020-02-05 10:33 ` Michael S. Tsirkin
2020-02-06 3:09 ` Jason Wang
2020-02-06 3:04 ` Jason Wang
2020-02-05 12:56 ` Jason Gunthorpe
2020-02-05 13:14 ` Michael S. Tsirkin
2020-02-06 3:11 ` Jason Wang
2020-02-06 3:21 ` Zhu Lingshan
2020-02-18 13:53 ` Jason Gunthorpe
2020-02-19 2:52 ` Tiwei Bie
2020-02-19 13:11 ` Jason Gunthorpe
2020-02-20 2:42 ` Tiwei Bie
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