From: "Michael S. Tsirkin" <mst@redhat.com>
To: Parav Pandit <parav@nvidia.com>
Cc: Jason Wang <jasowang@redhat.com>,
"virtio-dev@lists.oasis-open.org"
<virtio-dev@lists.oasis-open.org>,
"cohuck@redhat.com" <cohuck@redhat.com>,
"virtio-comment@lists.oasis-open.org"
<virtio-comment@lists.oasis-open.org>,
Shahaf Shuler <shahafs@nvidia.com>,
Satananda Burla <sburla@marvell.com>,
Maxime Coquelin <maxime.coquelin@redhat.com>,
Yan Vugenfirer <yan@daynix.com>
Subject: [virtio-dev] Re: [virtio-comment] Re: [PATCH 09/11] transport-pci: Describe PCI MMR dev config registers
Date: Thu, 13 Apr 2023 17:02:22 -0400 [thread overview]
Message-ID: <20230413163216-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <f9f01f9d-f6ec-0daa-a11d-c75589dcbe6c@nvidia.com>
On Thu, Apr 13, 2023 at 01:24:24PM -0400, Parav Pandit wrote:
> > > > - work for virtualization (and it work even without dedicated
> > > > mediation for some setups)
> > > I am not aware where can it work without mediation. Do you know any
> > > specific kernel version where it actually works?
> >
> > E.g current Linux driver did:
> >
> > rc = pci_request_region(pci_dev, 0, "virtio-pci-legacy");
> >
> > It doesn't differ from I/O with memory. It means if you had a
> > "transitional" device with legacy MMIO BAR0, it just works.
> >
>
> Thanks to the abstract PCI API in Linux.
Right. I do however at least see the point of what Jason is proposing,
which is to enable some legacy guests without mediation in software.
This thing ... you move some code to the card and reduce the amount of
virtio knowledge in software but do not eliminate it completely.
Seems kind of pointless. Minimal hardware changes make more sense to
me, I'd say. Talking about that, what is a minimal hardware change
to allow a vdpa based solution?
I think that's VIRTIO_NET_F_LEGACY_HEADER, right?
--
MST
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next prev parent reply other threads:[~2023-04-13 21:02 UTC|newest]
Thread overview: 200+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-30 22:58 [virtio-dev] [PATCH 00/11] Introduce transitional mmr pci device Parav Pandit
2023-03-30 22:58 ` [virtio-dev] [PATCH 01/11] transport-pci: Use lowecase alphabets Parav Pandit
2023-03-30 22:58 ` [virtio-dev] [PATCH 02/11] transport-pci: Move transitional device id to legacy section Parav Pandit
2023-03-31 6:43 ` [virtio-dev] " Michael S. Tsirkin
2023-03-31 21:24 ` [virtio-dev] " Parav Pandit
2023-04-02 7:54 ` [virtio-dev] " Michael S. Tsirkin
2023-04-03 14:42 ` [virtio-dev] " Parav Pandit
2023-04-03 14:50 ` [virtio-dev] " Michael S. Tsirkin
2023-04-03 14:58 ` [virtio-dev] " Parav Pandit
2023-04-03 15:14 ` [virtio-dev] " Michael S. Tsirkin
2023-03-30 22:58 ` [virtio-dev] [PATCH 03/11] transport-pci: Split notes of PCI Device Layout Parav Pandit
2023-03-30 22:58 ` [virtio-dev] [PATCH 04/11] transport-pci: Rename and move legacy PCI Device layout section Parav Pandit
2023-03-30 22:58 ` [virtio-dev] [PATCH 05/11] introduction: Add missing helping verb Parav Pandit
2023-03-30 22:58 ` [virtio-dev] [PATCH 06/11] introduction: Introduce transitional MMR interface Parav Pandit
2023-04-07 9:17 ` [virtio-dev] " Michael S. Tsirkin
2023-03-30 22:58 ` [virtio-dev] [PATCH 07/11] transport-pci: Introduce transitional MMR device id Parav Pandit
2023-04-04 7:28 ` [virtio-dev] " Michael S. Tsirkin
2023-04-04 16:08 ` Parav Pandit
2023-04-07 12:03 ` [virtio-dev] Re: [virtio-comment] " Michael S. Tsirkin
2023-04-07 15:18 ` [virtio-dev] " Parav Pandit
2023-04-07 15:51 ` [virtio-dev] " Michael S. Tsirkin
2023-04-09 3:15 ` [virtio-dev] " Parav Pandit
2023-04-10 10:18 ` [virtio-dev] " Michael S. Tsirkin
2023-04-10 14:34 ` Parav Pandit
2023-04-10 19:58 ` Michael S. Tsirkin
2023-04-10 20:16 ` Parav Pandit
2023-04-07 8:37 ` [virtio-dev] " Michael S. Tsirkin
2023-03-30 22:58 ` [virtio-dev] [PATCH 08/11] transport-pci: Introduce virtio extended capability Parav Pandit
2023-04-04 7:35 ` [virtio-dev] " Michael S. Tsirkin
2023-04-04 7:54 ` Cornelia Huck
2023-04-04 12:43 ` Michael S. Tsirkin
2023-04-04 13:19 ` Cornelia Huck
2023-04-04 14:37 ` Michael S. Tsirkin
2023-04-10 16:21 ` Parav Pandit
2023-04-10 19:49 ` Michael S. Tsirkin
2023-04-10 19:57 ` [virtio-dev] " Parav Pandit
2023-04-10 20:02 ` [virtio-dev] " Michael S. Tsirkin
2023-04-11 8:39 ` Cornelia Huck
2023-04-04 21:18 ` [virtio-dev] " Parav Pandit
2023-04-05 5:10 ` [virtio-dev] " Michael S. Tsirkin
2023-04-05 13:16 ` [virtio-dev] " Parav Pandit
2023-04-07 8:15 ` [virtio-dev] " Michael S. Tsirkin
2023-04-10 1:36 ` [virtio-dev] " Jason Wang
2023-04-10 6:24 ` Michael S. Tsirkin
2023-04-10 7:16 ` Jason Wang
2023-04-10 10:04 ` Michael S. Tsirkin
2023-04-11 2:19 ` Jason Wang
2023-04-11 7:00 ` Michael S. Tsirkin
2023-04-11 9:07 ` Jason Wang
2023-04-11 10:43 ` Michael S. Tsirkin
2023-04-11 13:59 ` Parav Pandit
2023-04-11 14:11 ` Michael S. Tsirkin
2023-04-11 13:47 ` Parav Pandit
2023-04-11 14:02 ` Michael S. Tsirkin
2023-04-11 14:07 ` [virtio-dev] RE: [virtio-comment] " Parav Pandit
2023-04-11 14:10 ` [virtio-dev] " Michael S. Tsirkin
2023-04-11 14:30 ` [virtio-dev] " Parav Pandit
2023-04-10 17:54 ` Parav Pandit
2023-04-10 17:58 ` [virtio-dev] RE: [virtio-comment] " Parav Pandit
2023-04-11 3:28 ` Jason Wang
2023-04-11 19:01 ` Parav Pandit
2023-04-11 21:25 ` Michael S. Tsirkin
2023-04-12 0:40 ` Parav Pandit
2023-04-12 2:56 ` Michael S. Tsirkin
2023-04-12 4:07 ` Jason Wang
2023-04-12 4:20 ` Michael S. Tsirkin
2023-04-12 4:53 ` [virtio-dev] Re: [virtio-comment] " Jason Wang
2023-04-12 5:25 ` Michael S. Tsirkin
2023-04-12 5:37 ` Jason Wang
2023-04-13 17:03 ` Michael S. Tsirkin
2023-04-12 4:04 ` Jason Wang
2023-04-12 4:13 ` Parav Pandit
2023-04-12 4:20 ` Michael S. Tsirkin
2023-04-12 4:55 ` Jason Wang
2023-05-19 6:10 ` [virtio-dev] " Michael S. Tsirkin
2023-05-19 21:02 ` [virtio-dev] " Parav Pandit
2023-05-21 5:57 ` [virtio-dev] " Michael S. Tsirkin
2023-05-21 13:24 ` [virtio-dev] " Parav Pandit
2023-05-21 14:34 ` [virtio-dev] " Michael S. Tsirkin
2023-03-30 22:58 ` [virtio-dev] [PATCH 09/11] transport-pci: Describe PCI MMR dev config registers Parav Pandit
2023-04-07 8:55 ` [virtio-dev] " Michael S. Tsirkin
2023-04-10 1:33 ` [virtio-dev] Re: [virtio-comment] " Jason Wang
2023-04-10 6:14 ` Michael S. Tsirkin
2023-04-10 6:20 ` Jason Wang
2023-04-10 6:39 ` Michael S. Tsirkin
2023-04-10 7:20 ` Jason Wang
2023-04-10 10:06 ` Michael S. Tsirkin
2023-04-11 2:13 ` Jason Wang
2023-04-11 7:04 ` Michael S. Tsirkin
2023-04-11 9:01 ` Jason Wang
[not found] ` <CALBs2cXURMEzCGnULicXbsBfwnKE5cZOz=M-_hhFCXZ=Lqb9Nw@mail.gmail.com>
2023-04-11 10:39 ` Michael S. Tsirkin
2023-04-11 11:03 ` Yan Vugenfirer
2023-04-11 10:42 ` Michael S. Tsirkin
2023-04-12 3:58 ` Jason Wang
2023-04-12 4:15 ` Michael S. Tsirkin
2023-04-12 4:51 ` Jason Wang
2023-04-12 5:01 ` [virtio-dev] " Parav Pandit
2023-04-12 5:14 ` [virtio-dev] " Jason Wang
2023-04-12 5:30 ` [virtio-dev] " Parav Pandit
2023-04-12 5:38 ` [virtio-dev] " Jason Wang
2023-04-12 5:55 ` [virtio-dev] " Parav Pandit
2023-04-12 6:15 ` [virtio-dev] " Jason Wang
2023-04-12 14:23 ` [virtio-dev] " Parav Pandit
2023-04-13 1:48 ` [virtio-dev] " Jason Wang
2023-04-13 3:31 ` Parav Pandit
2023-04-13 5:14 ` Jason Wang
2023-04-13 17:19 ` Michael S. Tsirkin
2023-04-13 19:39 ` [virtio-dev] " Parav Pandit
2023-04-14 3:09 ` [virtio-dev] " Jason Wang
2023-04-14 3:18 ` [virtio-dev] " Parav Pandit
2023-04-14 3:37 ` [virtio-dev] " Jason Wang
2023-04-14 3:51 ` [virtio-dev] " Parav Pandit
2023-04-14 7:05 ` [virtio-dev] " Michael S. Tsirkin
2023-04-17 3:22 ` Jason Wang
2023-04-17 17:23 ` [virtio-dev] " Parav Pandit
2023-04-17 20:26 ` [virtio-dev] " Michael S. Tsirkin
2023-04-17 20:28 ` [virtio-dev] " Parav Pandit
2023-04-18 0:36 ` [virtio-dev] " Jason Wang
2023-04-18 1:30 ` [virtio-dev] " Parav Pandit
2023-04-18 11:58 ` [virtio-dev] " Michael S. Tsirkin
2023-04-18 12:09 ` [virtio-dev] " Parav Pandit
2023-04-18 12:30 ` [virtio-dev] " Michael S. Tsirkin
2023-04-18 12:36 ` [virtio-dev] " Parav Pandit
2023-04-18 1:01 ` [virtio-dev] " Jason Wang
2023-04-18 1:48 ` [virtio-dev] " Parav Pandit
2023-04-13 17:24 ` [virtio-dev] " Parav Pandit
2023-04-13 21:02 ` Michael S. Tsirkin [this message]
2023-04-13 21:08 ` [virtio-dev] " Parav Pandit
2023-04-14 2:36 ` [virtio-dev] " Jason Wang
2023-04-14 2:43 ` [virtio-dev] " Parav Pandit
2023-04-14 6:57 ` [virtio-dev] " Michael S. Tsirkin
2023-04-16 13:41 ` [virtio-dev] " Parav Pandit
2023-04-16 20:44 ` [virtio-dev] " Michael S. Tsirkin
2023-04-17 16:59 ` [virtio-dev] " Parav Pandit
2023-04-18 1:09 ` [virtio-dev] " Jason Wang
2023-04-18 1:37 ` [virtio-dev] " Parav Pandit
2023-04-14 6:58 ` [virtio-dev] " Michael S. Tsirkin
2023-04-14 3:08 ` Jason Wang
2023-04-14 3:13 ` [virtio-dev] " Parav Pandit
2023-04-14 3:18 ` [virtio-dev] " Jason Wang
2023-04-14 3:22 ` [virtio-dev] " Parav Pandit
2023-04-14 3:29 ` [virtio-dev] " Jason Wang
2023-04-11 13:57 ` [virtio-dev] " Parav Pandit
2023-04-12 4:33 ` [virtio-dev] " Michael S. Tsirkin
2023-03-30 22:58 ` [virtio-dev] [PATCH 10/11] transport-pci: Use driver notification PCI capability Parav Pandit
2023-04-12 4:31 ` [virtio-dev] " Michael S. Tsirkin
2023-04-12 4:37 ` [virtio-dev] " Parav Pandit
2023-04-12 4:43 ` [virtio-dev] " Michael S. Tsirkin
2023-04-12 4:48 ` [virtio-dev] " Parav Pandit
2023-04-12 5:02 ` [virtio-dev] " Michael S. Tsirkin
2023-04-12 5:06 ` [virtio-dev] RE: [virtio-comment] " Parav Pandit
2023-04-12 5:17 ` [virtio-dev] " Michael S. Tsirkin
2023-04-12 5:24 ` [virtio-dev] " Parav Pandit
2023-04-12 5:27 ` [virtio-dev] " Michael S. Tsirkin
2023-03-30 22:58 ` [virtio-dev] [PATCH 11/11] conformance: Add transitional MMR interface conformance Parav Pandit
2023-03-31 7:03 ` [virtio-dev] Re: [PATCH 00/11] Introduce transitional mmr pci device Michael S. Tsirkin
2023-03-31 21:43 ` Parav Pandit
2023-04-03 14:53 ` Michael S. Tsirkin
2023-04-03 14:57 ` [virtio-dev] " Parav Pandit
2023-04-03 15:06 ` [virtio-dev] " Michael S. Tsirkin
2023-04-03 15:16 ` [virtio-dev] " Parav Pandit
2023-04-03 15:23 ` [virtio-dev] " Michael S. Tsirkin
2023-04-03 15:34 ` Michael S. Tsirkin
2023-04-03 15:47 ` [virtio-dev] " Parav Pandit
2023-04-03 17:28 ` [virtio-dev] " Michael S. Tsirkin
2023-04-03 17:35 ` Parav Pandit
2023-04-03 17:39 ` Michael S. Tsirkin
2023-04-03 15:36 ` [virtio-dev] RE: [virtio-comment] " Parav Pandit
2023-04-03 17:16 ` [virtio-dev] " Michael S. Tsirkin
2023-04-03 17:29 ` Parav Pandit
2023-04-03 18:02 ` Michael S. Tsirkin
2023-04-03 20:25 ` [virtio-dev] " Parav Pandit
2023-04-03 21:04 ` [virtio-dev] " Michael S. Tsirkin
2023-04-03 22:00 ` Parav Pandit
2023-04-07 9:35 ` Michael S. Tsirkin
2023-04-10 1:52 ` Jason Wang
2023-04-03 14:45 ` [virtio-dev] Re: [virtio-comment] " Stefan Hajnoczi
2023-04-03 14:53 ` Parav Pandit
2023-04-03 17:48 ` Michael S. Tsirkin
2023-04-03 19:11 ` Stefan Hajnoczi
2023-04-03 20:03 ` Michael S. Tsirkin
2023-04-03 19:48 ` [virtio-dev] " Parav Pandit
2023-04-03 20:02 ` [virtio-dev] " Michael S. Tsirkin
2023-04-03 20:42 ` [virtio-dev] " Parav Pandit
2023-04-03 21:14 ` [virtio-dev] " Michael S. Tsirkin
2023-04-03 22:08 ` Parav Pandit
2023-04-03 19:10 ` Stefan Hajnoczi
2023-04-03 20:27 ` [virtio-dev] " Parav Pandit
2023-04-04 14:30 ` [virtio-dev] " Stefan Hajnoczi
2023-04-12 4:48 ` [virtio-dev] " Michael S. Tsirkin
2023-04-12 4:52 ` [virtio-dev] " Parav Pandit
2023-04-12 5:12 ` [virtio-dev] " Michael S. Tsirkin
2023-04-12 5:15 ` [virtio-dev] RE: [virtio-comment] " Parav Pandit
2023-04-12 5:23 ` [virtio-dev] " Michael S. Tsirkin
2023-04-12 5:39 ` [virtio-dev] " Parav Pandit
2023-04-12 6:02 ` Parav Pandit
2023-04-12 5:10 ` [virtio-dev] " Halil Pasic
2023-04-25 2:42 ` [virtio-dev] " Parav Pandit
2023-05-02 7:17 ` [virtio-dev] Re: [virtio-comment] " David Edmondson
2023-05-02 13:54 ` [virtio-dev] " Parav Pandit
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