From: Parav Pandit <parav@nvidia.com>
To: Jason Wang <jasowang@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
Jiri Pirko <jiri@nvidia.com>,
"virtio-comment@lists.oasis-open.org"
<virtio-comment@lists.oasis-open.org>,
"virtio-dev@lists.oasis-open.org"
<virtio-dev@lists.oasis-open.org>,
"cohuck@redhat.com" <cohuck@redhat.com>,
"sgarzare@redhat.com" <sgarzare@redhat.com>,
"stefanha@redhat.com" <stefanha@redhat.com>,
"nrupal.jani@intel.com" <nrupal.jani@intel.com>,
"Piotr.Uminski@intel.com" <Piotr.Uminski@intel.com>,
"hang.yuan@intel.com" <hang.yuan@intel.com>,
"virtio@lists.oasis-open.org" <virtio@lists.oasis-open.org>,
Zhu Lingshan <lingshan.zhu@intel.com>,
"pasic@linux.ibm.com" <pasic@linux.ibm.com>,
Shahaf Shuler <shahafs@nvidia.com>,
Max Gurtovoy <mgurtovoy@nvidia.com>
Subject: RE: [virtio-comment] [PATCH v10 00/10] Introduce device group and device management
Date: Wed, 8 Mar 2023 12:02:52 +0000 [thread overview]
Message-ID: <PH0PR12MB5481D9E60BAF797EC3B29C79DCB49@PH0PR12MB5481.namprd12.prod.outlook.com> (raw)
In-Reply-To: <CACGkMEtxRWguwC0SgZ5wDDpcyw08r3GAD2=BP=Y88yMXZQ-FNQ@mail.gmail.com>
> From: Jason Wang <jasowang@redhat.com>
> Sent: Wednesday, March 8, 2023 12:12 AM
> > In other words, can AQ command be useful tomorrow for doing SIOV device
> add/remove, and provisioning from non-owning PF?
> > The way AQ is crafted today is not there yet, but in the future, it can be
> extended.
>
> There's already a proposal to use the queue as a transport. Any device that
> can't use a transport specific configuration or provisioning can benefit from
> that. SIOV is only one of the users for that.
>
o.k. Better to include that link in the cover letter.
> > >
> > > >
> > > > >There is interest in the community to include an interface to
> > > > >allow this in the virtio spec, when the PF is a virtio device.
> > > > >This is what this patch does.
> > > >
> > > > Yeah, but why? As I asked before, what are the usecases? The fact
> > > > there is interest in the community does not mean it makes sense to
> > > > have it :)
> > > >
> > >
> > > If people want to build such hardware it will need some interface.
> > > Far better to have it standard.
> > >
> > >
> > > But generally e.g. intel already said they will reuse this same
> > > structure with a different group type for SIOV support.
> > > I'll mention this in the cover letter.
> > >
> >
> > We have the following already identified use cases of a device agnostic VQ.
> >
> > 1. SR-IOV VF device provisioning at virtio layer (features and config)
> > 2. SR IOV (SR-PCIM interface of the PCI spec) for VF provisioning, for
> > example, MSI-X vectors
> >
>
> The virtio layer device provisioning is transport independent.
Yes. I listed known use cases above. If there are more that can use, sure.
> I don't see
> anything that is PCI specific there. Even the MSI-X could be reused by other
> transport.
>
Maybe yes.
I just don’t know which other transport of virtio has defined MSI-X.
If there is, sure there are more users of AQ.
> > 3. SR-IOV VF Live migration
>
> I think we don't want a partial solution for live migration that only works for PCI
> VF devices and L1. Instead, there needs to be a general device facility section
> and the admin virtqueue could be one of the interfaces for the driver to use the
> facility.
>
May be there are more use cases of AQ than what I listed.
> > 4. Above #1 to #3 for SIOV devices instead of SRIOV devices
>
> If we make the above as a general facility, it would not be hard to re-use them
> for transport virtqueue or SIOV.
>
Ok. thanks.
next prev parent reply other threads:[~2023-03-08 12:02 UTC|newest]
Thread overview: 136+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1677761896.git.mst@redhat.com>
2023-03-06 16:40 ` [virtio-comment] [PATCH v10 00/10] Introduce device group and device management Jiri Pirko
2023-03-06 22:48 ` Michael S. Tsirkin
2023-03-07 7:17 ` Jiri Pirko
2023-03-07 17:15 ` Michael S. Tsirkin
[not found] ` <2d232eba17d75c5dad2db17dc297f34a3612c33e.1677761896.git.mst@redhat.com>
2023-03-06 17:00 ` [virtio-comment] Re: [virtio] [PATCH v10 02/10] admin: introduce device group and related concepts David Edmondson
[not found] ` <0a784140387c2a592f7e1e7bbc5ae926ec5b45da.1677761896.git.mst@redhat.com>
[not found] ` <m2leka0yvl.fsf@oracle.com>
2023-03-06 22:00 ` [virtio-comment] Re: [virtio] [PATCH v10 01/10] virtio: document forward compatibility guarantees Michael S. Tsirkin
2023-03-07 10:04 ` David Edmondson
2023-03-08 14:16 ` Cornelia Huck
2023-03-08 15:04 ` Michael S. Tsirkin
[not found] ` <ZAXcqqdwfoLokT2l@nanopsycho>
2023-03-06 22:54 ` [virtio-comment] [PATCH v10 00/10] Introduce device group and device management Michael S. Tsirkin
2023-03-07 7:21 ` Jiri Pirko
2023-03-07 17:20 ` Michael S. Tsirkin
2023-03-07 19:31 ` Parav Pandit
2023-03-08 5:11 ` Jason Wang
2023-03-08 12:02 ` Parav Pandit [this message]
2023-03-10 8:32 ` Zhu, Lingshan
2023-03-08 9:49 ` [virtio-comment] Re: [virtio] " Jiri Pirko
2023-03-08 16:30 ` Cornelia Huck
2023-03-08 17:22 ` Michael S. Tsirkin
2023-03-08 18:15 ` Jiri Pirko
[not found] ` <910b3607a5f255134d30b3e1233e564f564eafb8.1677761896.git.mst@redhat.com>
[not found] ` <20230302201011.GB2554028@fedora>
[not found] ` <20230302185214-mutt-send-email-mst@kernel.org>
[not found] ` <20230303131337.GA2866370@fedora>
[not found] ` <20230303081515-mutt-send-email-mst@kernel.org>
2023-03-03 20:23 ` [virtio-comment] Re: [PATCH v10 03/10] admin: introduce group administration commands Stefan Hajnoczi
2023-03-07 11:31 ` [virtio-comment] Re: [virtio-dev] " Jiri Pirko
2023-03-08 12:03 ` Michael S. Tsirkin
2023-03-07 10:31 ` [virtio-comment] Re: [virtio] " David Edmondson
[not found] ` <PH0PR12MB548116853CAC23DF9CA7345EDCB29@PH0PR12MB5481.namprd12.prod.outlook.com>
[not found] ` <20230302184447-mutt-send-email-mst@kernel.org>
2023-03-07 18:26 ` [virtio-comment] " Parav Pandit
2023-03-15 10:44 ` [virtio-comment] " Max Gurtovoy
[not found] ` <20230302201912.GC2554028@fedora>
[not found] ` <20230302185803-mutt-send-email-mst@kernel.org>
[not found] ` <20230303131703.GB2866370@fedora>
[not found] ` <20230303081900-mutt-send-email-mst@kernel.org>
[not found] ` <4f869944-4ccd-c51e-0f30-dc3ba15ffd52@nvidia.com>
2023-03-07 18:33 ` [virtio-comment] " Parav Pandit
2023-03-08 0:34 ` [virtio-comment] " Michael S. Tsirkin
2023-03-08 1:01 ` [virtio-comment] " Parav Pandit
2023-03-08 1:06 ` [virtio-comment] " Michael S. Tsirkin
2023-03-08 1:14 ` [virtio-comment] " Parav Pandit
2023-03-08 10:55 ` [virtio-comment] " Max Gurtovoy
2023-03-08 12:07 ` Michael S. Tsirkin
2023-03-08 13:05 ` Max Gurtovoy
2023-03-08 14:43 ` Cornelia Huck
2023-03-08 14:54 ` Michael S. Tsirkin
2023-03-08 15:21 ` Michael S. Tsirkin
2023-03-09 0:29 ` Max Gurtovoy
2023-03-09 6:38 ` Michael S. Tsirkin
[not found] ` <20c81b66f0b21b5bd646c24840ac3f8462c86acf.1677761896.git.mst@redhat.com>
[not found] ` <20230302204007.GD2554028@fedora>
[not found] ` <20230302190230-mutt-send-email-mst@kernel.org>
[not found] ` <20230303132840.GC2866370@fedora>
2023-03-03 13:37 ` [virtio-comment] Re: [PATCH v10 04/10] admin: introduce virtio admin virtqueues Michael S. Tsirkin
2023-03-03 20:21 ` [virtio-comment] Re: [virtio] " Stefan Hajnoczi
2023-03-05 9:38 ` Michael S. Tsirkin
2023-03-06 0:03 ` Stefan Hajnoczi
2023-03-06 0:18 ` Michael S. Tsirkin
[not found] ` <20230306110340.GA35392@fedora>
2023-03-06 18:37 ` Michael S. Tsirkin
2023-03-06 20:17 ` Stefan Hajnoczi
2023-03-06 21:43 ` Michael S. Tsirkin
2023-03-31 11:07 ` Michael S. Tsirkin
2023-03-07 8:03 ` Jiri Pirko
2023-03-07 14:39 ` Stefan Hajnoczi
2023-03-07 15:07 ` Jiri Pirko
2023-03-07 19:03 ` Stefan Hajnoczi
2023-03-07 19:09 ` Parav Pandit
2023-03-08 5:17 ` [virtio-comment] Re: [virtio] " Jason Wang
2023-03-08 11:58 ` Stefan Hajnoczi
2023-03-08 11:59 ` Michael S. Tsirkin
2023-03-08 10:17 ` Jiri Pirko
2023-03-08 12:44 ` Stefan Hajnoczi
2023-03-08 12:57 ` [virtio-comment] Re: [virtio] " Jiri Pirko
2023-03-08 17:17 ` Stefan Hajnoczi
2023-03-07 16:13 ` Michael S. Tsirkin
2023-03-08 10:08 ` Jiri Pirko
2023-03-08 11:44 ` Michael S. Tsirkin
[not found] ` <7f63fa0a-7deb-5875-6c6b-bfc651681653@redhat.com>
[not found] ` <20230306112030.GB35392@fedora>
2023-03-06 15:28 ` Max Gurtovoy
2023-03-06 16:25 ` Stefan Hajnoczi
2023-03-07 19:04 ` [virtio-comment] " Parav Pandit
2023-03-08 11:17 ` [virtio-comment] " Max Gurtovoy
2023-03-08 14:13 ` Stefan Hajnoczi
2023-03-08 16:19 ` Max Gurtovoy
2023-03-08 17:15 ` Stefan Hajnoczi
2023-03-08 17:21 ` Michael S. Tsirkin
2023-03-09 12:35 ` Stefan Hajnoczi
2023-03-09 13:55 ` Michael S. Tsirkin
2023-03-09 15:56 ` Stefan Hajnoczi
2023-03-08 16:21 ` Parav Pandit
[not found] ` <e8d41902-b794-66e9-8f15-e8617435047c@redhat.com>
2023-03-06 16:22 ` Jiri Pirko
[not found] ` <027fff1b-8ed7-abc0-2331-b188b8822bf4@nvidia.com>
2023-03-06 22:49 ` [virtio-comment] " Michael S. Tsirkin
2023-03-08 20:58 ` Max Gurtovoy
2023-03-08 21:09 ` Michael S. Tsirkin
2023-03-08 21:17 ` Parav Pandit
2023-03-09 7:28 ` [virtio-comment] Re: [virtio-dev] " Jiri Pirko
2023-03-07 7:56 ` Jiri Pirko
[not found] ` <ZAXfegxCfvfLwiJT@nanopsycho>
2023-03-06 15:37 ` [virtio-comment] Re: [virtio] " Max Gurtovoy
2023-03-06 18:44 ` Michael S. Tsirkin
2023-03-06 18:40 ` Michael S. Tsirkin
2023-03-07 7:36 ` Jiri Pirko
2023-03-07 16:30 ` Michael S. Tsirkin
2023-03-08 10:05 ` Jiri Pirko
2023-03-08 11:50 ` Michael S. Tsirkin
2023-03-08 12:08 ` Jiri Pirko
2023-03-08 17:29 ` Max Gurtovoy
2023-03-08 18:01 ` David Edmondson
2023-03-08 18:19 ` Jiri Pirko
2023-03-08 21:25 ` Parav Pandit
2023-03-09 7:30 ` Jiri Pirko
2023-03-09 13:04 ` Parav Pandit
2023-03-09 13:57 ` Michael S. Tsirkin
2023-03-09 14:02 ` David Edmondson
2023-03-09 14:11 ` Parav Pandit
2023-03-09 14:22 ` Michael S. Tsirkin
2023-03-09 14:30 ` Parav Pandit
2023-03-09 14:43 ` Michael S. Tsirkin
2023-03-09 16:53 ` Parav Pandit
2023-03-09 17:14 ` Michael S. Tsirkin
2023-03-09 17:16 ` Parav Pandit
2023-03-08 21:45 ` Parav Pandit
2023-03-09 7:37 ` Jiri Pirko
2023-03-09 12:36 ` Parav Pandit
2023-03-09 16:32 ` Jiri Pirko
2023-03-07 10:41 ` David Edmondson
[not found] ` <80c4bc60c9119f68b66f5a003564cec719cc1487.1677761896.git.mst@redhat.com>
2023-03-07 10:54 ` [virtio-comment] Re: [virtio-dev] [PATCH v10 08/10] admin: command list discovery David Edmondson
[not found] ` <ZAXbBgN2jw8RhE/3@nanopsycho>
2023-03-08 11:54 ` Michael S. Tsirkin
2023-03-08 12:41 ` Jiri Pirko
2023-03-31 11:43 ` Michael S. Tsirkin
2023-03-08 12:38 ` Jiri Pirko
2023-03-10 8:14 ` [virtio-comment] " Zhu, Lingshan
[not found] ` <20230302210929.GH2554028@fedora>
2023-03-31 11:39 ` Michael S. Tsirkin
[not found] ` <6677477d48dfc234d3d1a339fb39d8fa2a3b983d.1677761896.git.mst@redhat.com>
2023-03-07 11:04 ` [virtio-comment] [PATCH v10 09/10] admin: conformance clauses David Edmondson
2023-03-08 11:58 ` Michael S. Tsirkin
2023-03-08 12:59 ` David Edmondson
2023-03-08 13:05 ` [virtio-comment] Re: [virtio] " Jiri Pirko
2023-03-08 13:22 ` Michael S. Tsirkin
2023-03-08 13:44 ` David Edmondson
2023-03-08 14:02 ` Jiri Pirko
2023-03-08 14:12 ` Michael S. Tsirkin
2023-03-10 9:10 ` [virtio-comment] " Zhu, Lingshan
2023-03-10 9:13 ` Michael S. Tsirkin
2023-03-10 18:00 ` Zhu Lingshan
2023-03-10 9:34 ` Michael S. Tsirkin
[not found] ` <dd9c34ed74ee296228562f6946d4ca3f2fbee1e1.1677761896.git.mst@redhat.com>
[not found] ` <PH0PR12MB5481595368C8F0C0E16B681BDCB29@PH0PR12MB5481.namprd12.prod.outlook.com>
[not found] ` <20230303032434-mutt-send-email-mst@kernel.org>
[not found] ` <ZAXB44F3MS9CxIiK@nanopsycho>
2023-03-06 18:46 ` [virtio-comment] Re: [virtio] Re: [PATCH v10 06/10] mmio: document ADMIN_VQ as reserved Michael S. Tsirkin
2023-03-07 7:40 ` Jiri Pirko
2023-03-07 18:52 ` [virtio-comment] " Parav Pandit
2023-03-08 16:24 ` Cornelia Huck
2023-03-08 16:37 ` Parav Pandit
2023-03-08 16:30 ` [virtio-comment] " Michael S. Tsirkin
2023-03-08 18:21 ` [virtio-comment] Re: [virtio] " Jiri Pirko
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