Re: [PATCH] vhost: introduce vDPA based backend

Subject: Re: [PATCH] vhost: introduce vDPA based backend
From: Jason Wang <jasowang@xxxxxxxxxx>
Date: Tue, 4 Feb 2020 14:46:16 +0800
Cc: Tiwei Bie <tiwei.bie@xxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, shahafs@xxxxxxxxxxxx, jgg@xxxxxxxxxxxx, rob.miller@xxxxxxxxxxxx, haotian.wang@xxxxxxxxxx, eperezma@xxxxxxxxxx, lulu@xxxxxxxxxx, parav@xxxxxxxxxxxx, rdunlap@xxxxxxxxxxxxx, hch@xxxxxxxxxxxxx, jiri@xxxxxxxxxxxx, hanand@xxxxxxxxxx, mhabets@xxxxxxxxxxxxxx, maxime.coquelin@xxxxxxxxxx, lingshan.zhu@xxxxxxxxx, dan.daly@xxxxxxxxx, cunming.liang@xxxxxxxxx, zhihong.wang@xxxxxxxxx
In-reply-to: <20200204005306-mutt-send-email-mst@kernel.org>
References: <20200131033651.103534-1-tiwei.bie@intel.com> <7aab2892-bb19-a06a-a6d3-9c28bc4c3400@redhat.com> <20200204005306-mutt-send-email-mst@kernel.org>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0


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?

Thanks

Follow-Ups:
- Re: [PATCH] vhost: introduce vDPA based backend
  - From: Tiwei Bie

References:
- [PATCH] vhost: introduce vDPA based backend
  - From: Tiwei Bie
- Re: [PATCH] vhost: introduce vDPA based backend
  - From: Jason Wang
- Re: [PATCH] vhost: introduce vDPA based backend
  - From: Michael S. Tsirkin