From: "Michael S. Tsirkin" <mst@redhat.com>
To: "Zhu, Lingshan" <lingshan.zhu@intel.com>
Cc: Parav Pandit <parav@nvidia.com>, Jason Wang <jasowang@redhat.com>,
"virtio-comment@lists.oasis-open.org"
<virtio-comment@lists.oasis-open.org>,
"cohuck@redhat.com" <cohuck@redhat.com>,
"sburla@marvell.com" <sburla@marvell.com>,
Shahaf Shuler <shahafs@nvidia.com>,
Maor Gottlieb <maorg@nvidia.com>,
Yishai Hadas <yishaih@nvidia.com>
Subject: Re: [virtio-comment] Re: [PATCH v1 3/8] device-context: Define the device context fields for device migration
Date: Tue, 31 Oct 2023 06:14:13 -0400 [thread overview]
Message-ID: <20231031054617-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <640cc639-6065-4828-ac81-0cc809aff293@intel.com>
On Tue, Oct 31, 2023 at 05:42:29PM +0800, Zhu, Lingshan wrote:
> > Your answer is not relevant to this discussion at all.
> > Why?
> > Because we were discussing the schemes where registers are not used.
> > One example of that was IMS. It does not matter MSI or MSIX.
> > As explained in Intel's commit message, the key to focus for IMS is "queue memory" not some hw register like MSI or MSI-X.
> you know the device always need to know a address and the data to send a
> MSI, right?
So if virtio is to use IMS then we'll need to add interfaces to program
IMS, I think. As part of that patch - it's reasonable to assume - we will
also need to add a way to retrieve IMS so it can be migrated.
However, what this example demonstrates is that the approach taken
by this proposal to migrate control path structures - namely, by
defining a structure used just for migration - means that we will
need to come up with a migration interface each time.
And that is unfortunate.
Compare to the trap and emulate approach for config space and we don't
need a new interface, we just make each field R/W.
So I feel this is something to think about, and address.
Ideas?
--
MST
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next prev parent reply other threads:[~2023-10-31 10:14 UTC|newest]
Thread overview: 341+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-08 11:25 [virtio-comment] [PATCH v1 0/8] Introduce device migration support commands Parav Pandit
2023-10-08 11:25 ` [virtio-comment] [PATCH v1 1/8] admin: Add theory of operation for device migration Parav Pandit
2023-10-09 8:49 ` Jason Wang
2023-10-09 10:06 ` Parav Pandit
2023-10-10 5:51 ` Jason Wang
2023-10-10 7:19 ` Parav Pandit
2023-10-10 12:41 ` Michael S. Tsirkin
2023-10-10 13:08 ` Parav Pandit
2023-10-10 14:00 ` Michael S. Tsirkin
2023-10-10 14:09 ` Parav Pandit
2023-10-10 14:55 ` Michael S. Tsirkin
2023-10-11 3:14 ` Jason Wang
2023-10-11 6:02 ` Michael S. Tsirkin
2023-10-11 10:47 ` Parav Pandit
2023-10-11 20:14 ` Michael S. Tsirkin
2023-10-12 10:21 ` Parav Pandit
2023-10-13 1:15 ` Jason Wang
2023-10-13 6:36 ` Parav Pandit
2023-10-17 1:41 ` Jason Wang
2023-10-18 8:16 ` Parav Pandit
2023-10-18 10:19 ` Michael S. Tsirkin
2023-10-18 10:33 ` Parav Pandit
2023-10-19 2:41 ` Jason Wang
2023-10-13 11:41 ` Michael S. Tsirkin
2023-10-09 12:02 ` Parav Pandit
2023-10-09 16:19 ` Michael S. Tsirkin
2023-10-09 17:21 ` Parav Pandit
2023-10-10 8:57 ` Zhu, Lingshan
2023-10-10 9:40 ` Parav Pandit
2023-10-11 10:25 ` Zhu, Lingshan
2023-10-11 11:43 ` Parav Pandit
2023-10-12 10:21 ` Zhu, Lingshan
2023-10-12 10:58 ` Parav Pandit
2023-10-12 11:17 ` Michael S. Tsirkin
2023-10-12 11:47 ` Parav Pandit
2023-10-12 13:05 ` Michael S. Tsirkin
2023-10-13 1:16 ` Jason Wang
2023-10-13 6:36 ` Parav Pandit
2023-10-17 1:53 ` Jason Wang
2023-10-17 2:02 ` Jason Wang
2023-10-17 3:19 ` Parav Pandit
2023-10-17 3:26 ` Parav Pandit
2023-10-18 0:52 ` Jason Wang
2023-10-18 4:30 ` Parav Pandit
2023-10-18 6:14 ` Michael S. Tsirkin
2023-10-18 6:26 ` Parav Pandit
2023-10-19 2:41 ` Jason Wang
2023-10-19 4:29 ` Parav Pandit
2023-10-19 4:44 ` Jason Wang
2023-10-19 5:31 ` Parav Pandit
2023-10-19 6:35 ` Michael S. Tsirkin
2023-10-19 7:30 ` Parav Pandit
2023-10-19 8:31 ` Michael S. Tsirkin
2023-10-19 8:58 ` Parav Pandit
2023-10-19 9:11 ` Michael S. Tsirkin
2023-10-19 9:20 ` Parav Pandit
2023-10-19 9:26 ` Michael S. Tsirkin
2023-10-19 9:33 ` Michael S. Tsirkin
2023-10-19 9:41 ` Parav Pandit
2023-10-19 9:53 ` Michael S. Tsirkin
2023-10-19 9:54 ` Michael S. Tsirkin
2023-10-19 10:00 ` Parav Pandit
2023-10-19 10:01 ` Parav Pandit
2023-10-19 9:39 ` Parav Pandit
2023-10-19 9:49 ` Michael S. Tsirkin
2023-10-19 9:57 ` Parav Pandit
2023-10-23 3:45 ` Jason Wang
2023-10-23 4:42 ` Parav Pandit
2023-10-24 4:46 ` Jason Wang
2023-10-24 4:49 ` Parav Pandit
2023-10-25 1:28 ` Jason Wang
2023-10-25 7:02 ` Parav Pandit
2023-10-26 0:46 ` Jason Wang
2023-10-26 3:45 ` Parav Pandit
2023-10-30 4:06 ` Jason Wang
2023-10-30 4:46 ` Parav Pandit
2023-10-31 1:34 ` Jason Wang
2023-10-31 5:30 ` Parav Pandit
2023-11-01 0:33 ` Jason Wang
2023-11-01 3:31 ` Parav Pandit
2023-11-02 4:25 ` Jason Wang
2023-11-02 6:10 ` Parav Pandit
2023-11-06 6:34 ` Jason Wang
2023-11-06 7:05 ` Parav Pandit
2023-11-07 4:05 ` Jason Wang
2023-11-07 7:22 ` Michael S. Tsirkin
2023-11-07 7:57 ` Zhu, Lingshan
2023-11-07 8:05 ` Michael S. Tsirkin
2023-11-08 4:28 ` Jason Wang
2023-11-09 6:25 ` Parav Pandit
2023-11-13 3:32 ` Jason Wang
2023-11-15 17:39 ` Parav Pandit
2023-11-16 4:20 ` Jason Wang
2023-11-16 5:28 ` Parav Pandit
2023-11-16 6:23 ` Michael S. Tsirkin
2023-11-16 6:34 ` Parav Pandit
2023-11-16 6:38 ` Michael S. Tsirkin
2023-11-16 6:43 ` Parav Pandit
2023-11-16 6:56 ` Michael S. Tsirkin
2023-11-16 7:02 ` Parav Pandit
2023-11-16 7:14 ` Michael S. Tsirkin
2023-11-16 9:45 ` Parav Pandit
2023-11-21 4:22 ` Jason Wang
2023-11-21 16:25 ` Parav Pandit
2023-11-22 4:13 ` Jason Wang
2023-11-22 7:48 ` Michael S. Tsirkin
2023-11-24 3:56 ` Jason Wang
2023-11-24 5:40 ` Michael S. Tsirkin
2023-11-21 7:24 ` Jason Wang
2023-11-21 16:32 ` Parav Pandit
2023-11-22 5:27 ` Jason Wang
2023-11-22 6:05 ` Parav Pandit
2023-11-24 3:40 ` Jason Wang
2023-11-17 10:08 ` Michael S. Tsirkin
2023-11-17 10:20 ` Parav Pandit
2023-11-17 11:11 ` Michael S. Tsirkin
2023-11-17 11:20 ` Parav Pandit
2023-11-17 11:43 ` Michael S. Tsirkin
2023-11-17 12:02 ` Parav Pandit
2023-11-17 12:30 ` Michael S. Tsirkin
2023-11-17 12:46 ` Parav Pandit
2023-11-17 13:54 ` Michael S. Tsirkin
2023-11-17 14:51 ` Parav Pandit
2023-11-17 15:09 ` Michael S. Tsirkin
2023-11-21 4:44 ` Jason Wang
2023-11-21 16:27 ` Parav Pandit
2023-11-22 4:16 ` Jason Wang
2023-11-22 4:39 ` Parav Pandit
2023-11-24 3:08 ` Jason Wang
2023-11-21 5:25 ` Jason Wang
2023-11-21 16:30 ` Parav Pandit
2023-11-22 4:18 ` Jason Wang
2023-11-22 4:26 ` Parav Pandit
2023-11-24 3:07 ` Jason Wang
2023-11-24 11:38 ` Michael S. Tsirkin
2023-11-24 11:51 ` Jason Wang
2023-11-24 12:10 ` Michael S. Tsirkin
2023-11-24 12:13 ` Parav Pandit
2023-11-24 12:19 ` Michael S. Tsirkin
2023-10-13 11:26 ` Michael S. Tsirkin
2023-10-13 11:41 ` Parav Pandit
2023-10-13 11:52 ` Michael S. Tsirkin
2023-10-13 11:57 ` Parav Pandit
2023-10-17 1:42 ` Jason Wang
2023-10-13 9:06 ` Zhu, Lingshan
2023-10-13 11:28 ` Michael S. Tsirkin
2023-10-13 11:42 ` Parav Pandit
2023-10-16 8:41 ` Zhu, Lingshan
2023-10-16 9:00 ` Michael S. Tsirkin
2023-10-16 9:44 ` Zhu, Lingshan
2023-10-13 11:28 ` Parav Pandit
2023-10-13 11:49 ` Michael S. Tsirkin
2023-10-13 12:00 ` Parav Pandit
2023-10-16 8:46 ` Zhu, Lingshan
2023-10-16 9:44 ` Zhu, Lingshan
2023-10-18 5:00 ` Parav Pandit
2023-10-18 6:32 ` Zhu, Lingshan
2023-10-18 6:34 ` Parav Pandit
2023-10-18 6:39 ` Zhu, Lingshan
2023-10-18 6:42 ` Parav Pandit
2023-10-11 19:51 ` Michael S. Tsirkin
2023-10-12 10:23 ` Zhu, Lingshan
2023-10-08 11:25 ` [virtio-comment] [PATCH v1 2/8] admin: Redefine reserved2 as command specific output Parav Pandit
2023-10-08 11:25 ` [virtio-comment] [PATCH v1 3/8] device-context: Define the device context fields for device migration Parav Pandit
2023-10-08 11:41 ` [virtio-comment] " Michael S. Tsirkin
2023-10-09 4:15 ` Parav Pandit
2023-10-09 15:54 ` Michael S. Tsirkin
2023-10-09 17:22 ` Parav Pandit
2023-10-09 10:34 ` Zhu, Lingshan
2023-10-09 14:30 ` Parav Pandit
2023-10-10 8:52 ` Zhu, Lingshan
2023-10-10 9:58 ` Parav Pandit
2023-10-11 10:07 ` Zhu, Lingshan
2023-10-11 10:54 ` Parav Pandit
2023-10-11 19:54 ` Michael S. Tsirkin
2023-10-12 10:00 ` Zhu, Lingshan
2023-10-12 10:06 ` Michael S. Tsirkin
2023-10-12 10:13 ` Parav Pandit
2023-10-12 10:52 ` Zhu, Lingshan
2023-10-12 10:09 ` Parav Pandit
2023-10-12 10:45 ` Michael S. Tsirkin
2023-10-12 11:23 ` Parav Pandit
2023-10-12 11:10 ` Zhu, Lingshan
2023-10-12 11:37 ` Parav Pandit
2023-10-12 13:03 ` Michael S. Tsirkin
2023-10-12 13:13 ` Parav Pandit
2023-10-13 1:18 ` Jason Wang
2023-10-13 6:40 ` Parav Pandit
2023-10-17 2:10 ` Jason Wang
2023-10-17 3:45 ` Parav Pandit
2023-10-18 0:52 ` Jason Wang
2023-10-18 5:28 ` Parav Pandit
2023-10-19 2:41 ` Jason Wang
2023-10-18 6:13 ` Michael S. Tsirkin
2023-10-13 9:44 ` Zhu, Lingshan
2023-10-13 11:54 ` Parav Pandit
2023-10-16 9:47 ` Zhu, Lingshan
2023-10-18 5:02 ` Parav Pandit
2023-10-18 6:20 ` Michael S. Tsirkin
2023-10-18 6:28 ` Parav Pandit
2023-10-18 6:35 ` Zhu, Lingshan
2023-10-18 6:41 ` Parav Pandit
2023-10-18 6:52 ` Zhu, Lingshan
2023-10-18 7:20 ` Parav Pandit
2023-10-18 8:42 ` Zhu, Lingshan
2023-10-18 8:53 ` Michael S. Tsirkin
2023-10-18 9:48 ` Parav Pandit
2023-10-18 9:56 ` Michael S. Tsirkin
2023-10-18 10:22 ` Parav Pandit
2023-10-18 10:47 ` Michael S. Tsirkin
2023-10-18 10:57 ` Parav Pandit
2023-10-19 8:18 ` Zhu, Lingshan
2023-10-19 8:37 ` Michael S. Tsirkin
2023-10-19 8:49 ` Zhu, Lingshan
2023-10-19 8:55 ` Michael S. Tsirkin
2023-10-23 3:44 ` Jason Wang
2023-10-23 4:42 ` Parav Pandit
2023-10-24 4:56 ` Jason Wang
2023-10-24 10:01 ` Parav Pandit
2023-10-25 1:28 ` Jason Wang
2023-10-25 7:15 ` Parav Pandit
2023-10-25 8:24 ` Michael S. Tsirkin
2023-10-25 9:50 ` Parav Pandit
2023-10-25 10:19 ` Michael S. Tsirkin
2023-10-25 10:22 ` Parav Pandit
2023-10-25 10:28 ` Michael S. Tsirkin
2023-10-26 3:32 ` Parav Pandit
2023-10-26 0:46 ` Jason Wang
2023-10-26 3:50 ` Parav Pandit
2023-10-30 4:04 ` Jason Wang
2023-10-30 4:27 ` Parav Pandit
2023-10-31 1:36 ` Jason Wang
2023-10-31 5:17 ` Parav Pandit
2023-11-01 0:33 ` Jason Wang
2023-11-01 3:07 ` Parav Pandit
2023-11-02 4:24 ` Jason Wang
2023-11-02 6:10 ` Parav Pandit
2023-11-02 14:01 ` Michael S. Tsirkin
2023-11-06 6:35 ` Jason Wang
2023-11-09 6:24 ` Parav Pandit
2023-10-19 8:15 ` Zhu, Lingshan
2023-10-19 9:01 ` Parav Pandit
2023-10-19 9:09 ` Zhu, Lingshan
2023-10-19 9:13 ` Parav Pandit
2023-10-19 9:14 ` Michael S. Tsirkin
2023-10-19 9:18 ` Zhu, Lingshan
2023-10-19 10:33 ` Parav Pandit
2023-10-19 11:19 ` Michael S. Tsirkin
2023-10-19 12:02 ` Parav Pandit
2023-10-20 9:31 ` Zhu, Lingshan
2023-10-20 9:41 ` Michael S. Tsirkin
2023-10-20 11:11 ` Zhu, Lingshan
2023-10-20 12:47 ` Parav Pandit
2023-10-23 9:48 ` Zhu, Lingshan
2023-10-23 10:01 ` Parav Pandit
2023-10-23 10:14 ` Zhu, Lingshan
2023-10-23 10:26 ` Parav Pandit
2023-10-24 10:10 ` Zhu, Lingshan
2023-10-24 10:11 ` Parav Pandit
2023-10-21 15:34 ` Michael S. Tsirkin
2023-10-23 10:03 ` Zhu, Lingshan
2023-10-23 11:32 ` Michael S. Tsirkin
2023-10-24 10:27 ` Zhu, Lingshan
2023-10-25 8:33 ` Michael S. Tsirkin
2023-10-26 0:56 ` Jason Wang
2023-10-26 3:58 ` Parav Pandit
2023-10-30 3:59 ` Jason Wang
2023-10-30 4:49 ` Parav Pandit
2023-10-26 6:22 ` Michael S. Tsirkin
2023-10-30 4:02 ` Jason Wang
2023-11-01 0:33 ` Jason Wang
2023-10-26 6:38 ` Zhu, Lingshan
2023-10-23 3:53 ` Jason Wang
2023-10-23 11:33 ` Michael S. Tsirkin
2023-10-20 12:54 ` Parav Pandit
2023-10-23 10:09 ` Zhu, Lingshan
2023-10-23 10:14 ` Parav Pandit
2023-10-24 10:30 ` Zhu, Lingshan
2023-10-24 10:37 ` Parav Pandit
2023-10-26 6:44 ` Zhu, Lingshan
2023-10-26 7:04 ` Parav Pandit
2023-10-30 3:44 ` Zhu, Lingshan
2023-10-30 4:17 ` Parav Pandit
2023-10-30 10:02 ` Zhu, Lingshan
2023-10-30 10:23 ` Parav Pandit
2023-10-30 11:34 ` Michael S. Tsirkin
2023-10-30 12:02 ` Parav Pandit
2023-10-31 9:35 ` Zhu, Lingshan
2023-10-31 9:42 ` Zhu, Lingshan
2023-10-31 10:14 ` Michael S. Tsirkin [this message]
2023-11-01 0:42 ` Jason Wang
2023-11-01 1:57 ` Zhu, Lingshan
2023-11-01 1:57 ` Zhu, Lingshan
2023-11-01 2:54 ` Parav Pandit
2023-11-01 5:31 ` Michael S. Tsirkin
2023-11-01 5:42 ` Parav Pandit
2023-11-01 6:37 ` Michael S. Tsirkin
2023-11-01 6:39 ` Zhu, Lingshan
2023-11-01 6:50 ` Parav Pandit
2023-11-01 6:56 ` Zhu, Lingshan
2023-11-01 7:03 ` Parav Pandit
2023-11-01 7:46 ` Zhu, Lingshan
2023-11-01 7:54 ` Parav Pandit
2023-11-01 8:55 ` Zhu, Lingshan
2023-11-01 9:07 ` Michael S. Tsirkin
2023-11-01 9:42 ` Zhu, Lingshan
2023-11-01 10:23 ` Michael S. Tsirkin
2023-11-01 8:36 ` Michael S. Tsirkin
2023-11-01 10:24 ` Parav Pandit
2023-11-01 6:47 ` Parav Pandit
2023-11-01 8:28 ` Michael S. Tsirkin
2023-11-01 8:49 ` Parav Pandit
2023-11-01 9:06 ` Michael S. Tsirkin
2023-11-01 10:01 ` Parav Pandit
2023-10-30 11:27 ` Michael S. Tsirkin
2023-10-30 11:48 ` Parav Pandit
2023-10-31 9:45 ` Zhu, Lingshan
2023-10-19 9:16 ` Zhu, Lingshan
2023-10-19 9:13 ` Michael S. Tsirkin
2023-10-13 13:49 ` Michael S. Tsirkin
2023-10-16 9:50 ` Zhu, Lingshan
2023-11-02 14:21 ` Michael S. Tsirkin
2023-11-02 14:40 ` [virtio-comment] " Parav Pandit
2023-11-02 14:53 ` [virtio-comment] " Michael S. Tsirkin
2023-11-02 15:06 ` [virtio-comment] " Parav Pandit
2023-11-02 17:05 ` [virtio-comment] " Michael S. Tsirkin
2023-10-08 11:25 ` [virtio-comment] [PATCH v1 4/8] admin: Add device migration admin commands Parav Pandit
2023-10-18 6:46 ` [virtio-comment] " Michael S. Tsirkin
2023-10-18 8:24 ` [virtio-comment] " Parav Pandit
2023-10-18 10:26 ` [virtio-comment] " Michael S. Tsirkin
2023-10-18 10:41 ` [virtio-comment] " Parav Pandit
2023-10-08 11:25 ` [virtio-comment] [PATCH v1 5/8] admin: Add requirements of device migration commands Parav Pandit
2023-10-08 11:25 ` [virtio-comment] [PATCH v1 6/8] admin: Add theory of operation for write recording commands Parav Pandit
2023-10-08 11:25 ` [virtio-comment] [PATCH v1 7/8] admin: Add " Parav Pandit
2023-10-08 11:52 ` [virtio-comment] " Michael S. Tsirkin
2023-10-09 4:14 ` [virtio-comment] " Parav Pandit
2023-10-09 10:57 ` [virtio-comment] " Michael S. Tsirkin
2023-10-09 11:48 ` Parav Pandit
2023-10-09 16:15 ` Michael S. Tsirkin
2023-10-09 17:22 ` Parav Pandit
2023-10-08 11:25 ` [virtio-comment] [PATCH v1 8/8] admin: Add requirements of write reporting commands Parav Pandit
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