netdev - Re: [PATCH 06/21] vdpa: introduce virtqueue groups

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Date:   Mon, 4 Jan 2021 10:04:58 +0000
From:   Stefan Hajnoczi <stefanha@...il.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     mst@...hat.com, kvm@...r.kernel.org, lulu@...hat.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, eperezma@...hat.com,
        stefanha@...hat.com, eli@...lanox.com, lingshan.zhu@...el.com,
        rob.miller@...adcom.com
Subject: Re: [PATCH 06/21] vdpa: introduce virtqueue groups

On Wed, Dec 16, 2020 at 02:48:03PM +0800, Jason Wang wrote:
> This patch introduces virtqueue groups to vDPA device. The virtqueue
> group is the minimal set of virtqueues that must share an address
> space. And the adddress space identifier could only be attached to
> a specific virtqueue group.
> 
> A new mandated bus operation is introduced to get the virtqueue group
> ID for a specific virtqueue.
> 
> All the vDPA device drivers were converted to simply support a single
> virtqueue group.
> 
> Signed-off-by: Jason Wang <jasowang@...hat.com>
> ---
>  drivers/vdpa/ifcvf/ifcvf_main.c   |  9 ++++++++-
>  drivers/vdpa/mlx5/net/mlx5_vnet.c |  8 +++++++-
>  drivers/vdpa/vdpa.c               |  4 +++-
>  drivers/vdpa/vdpa_sim/vdpa_sim.c  | 11 ++++++++++-
>  include/linux/vdpa.h              | 12 +++++++++---
>  5 files changed, 37 insertions(+), 7 deletions(-)

Maybe consider calling it iotlb_group or iommu_group so the purpose of
the group is clear?

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