From: Markus Armbruster <armbru@redhat.com>
To: Avihai Horon <avihaih@nvidia.com>
Cc: qemu-devel@nongnu.org,
"Alex Williamson" <alex.williamson@redhat.com>,
"Cédric Le Goater" <clg@redhat.com>,
"Michael Roth" <michael.roth@amd.com>,
"Eric Blake" <eblake@redhat.com>, "Peter Xu" <peterx@redhat.com>,
"Fabiano Rosas" <farosas@suse.de>,
"Joao Martins" <joao.m.martins@oracle.com>,
"Maor Gottlieb" <maorg@nvidia.com>
Subject: Re: [PATCH 1/3] qapi/vfio: Add VFIO device migration state change QAPI event
Date: Thu, 02 May 2024 13:19:15 +0200 [thread overview]
Message-ID: <87msp88nrg.fsf@pond.sub.org> (raw)
In-Reply-To: <20240430051621.19597-2-avihaih@nvidia.com> (Avihai Horon's message of "Tue, 30 Apr 2024 08:16:19 +0300")
Avihai Horon <avihaih@nvidia.com> writes:
> Add a new QAPI event for VFIO device migration state change. This event
> will be emitted when a VFIO device changes its migration state, for
> example, during migration or when stopping/starting the guest.
>
> This event can be used by management applications to get updates on the
> current state of the VFIO device for their own purposes.
>
> Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Can you explain briefly why this event makes sense only for VFIO devices?
> ---
> MAINTAINERS | 1 +
> qapi/qapi-schema.json | 1 +
> qapi/vfio.json | 61 +++++++++++++++++++++++++++++++++++++++++++
> qapi/meson.build | 1 +
> 4 files changed, 64 insertions(+)
> create mode 100644 qapi/vfio.json
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 302b6fd00c..ef58a39d36 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -2159,6 +2159,7 @@ F: hw/vfio/*
> F: include/hw/vfio/
> F: docs/igd-assign.txt
> F: docs/devel/migration/vfio.rst
> +F: qapi/vfio.json
>
> vfio-ccw
> M: Eric Farman <farman@linux.ibm.com>
> diff --git a/qapi/qapi-schema.json b/qapi/qapi-schema.json
> index 5e33da7228..b1581988e4 100644
> --- a/qapi/qapi-schema.json
> +++ b/qapi/qapi-schema.json
> @@ -78,5 +78,6 @@
> { 'include': 'pci.json' }
> { 'include': 'stats.json' }
> { 'include': 'virtio.json' }
> +{ 'include': 'vfio.json' }
> { 'include': 'cryptodev.json' }
> { 'include': 'cxl.json' }
> diff --git a/qapi/vfio.json b/qapi/vfio.json
> new file mode 100644
> index 0000000000..a38f26bccd
> --- /dev/null
> +++ b/qapi/vfio.json
> @@ -0,0 +1,61 @@
> +# -*- Mode: Python -*-
> +# vim: filetype=python
> +#
> +
> +##
> +# = VFIO devices
> +##
> +
> +##
> +# @VFIODeviceMigState:
> +#
> +# An enumeration of the VFIO device migration states.
> +#
> +# @stop: The device is stopped.
> +#
> +# @running: The device is running.
> +#
> +# @stop-copy: The device is stopped and its internal state is available
> +# for reading.
> +#
> +# @resuming: The device is stopped and its internal state is available
> +# for writing.
> +#
> +# @running-p2p: The device is running in the P2P quiescent state.
> +#
> +# @pre-copy: The device is running, tracking its internal state and its
> +# internal state is available for reading.
> +#
> +# @pre-copy-p2p: The device is running in the P2P quiescent state,
> +# tracking its internal state and its internal state is available
> +# for reading.
> +#
> +# Since: 9.1
> +##
> +{ 'enum': 'VFIODeviceMigState',
> + 'data': [ 'stop', 'running', 'stop-copy', 'resuming', 'running-p2p',
> + 'pre-copy', 'pre-copy-p2p' ],
> + 'prefix': 'QAPI_VFIO_DEVICE_MIG_STATE' }
> +
> +##
> +# @VFIO_DEVICE_MIG_STATE_CHANGED:
> +#
> +# This event is emitted when a VFIO device migration state is changed.
> +#
> +# @device-id: The id of the VFIO device (final component of QOM path).
Provide the full QOM path, please. Feel free to additionally provide
its qdev ID.
Precedence: events MEMORY_DEVICE_SIZE_CHANGE, DEVICE_DELETED,
DEVICE_UNPLUG_GUEST_ERROR, ...
> +#
> +# @device-state: The new changed device migration state.
> +#
> +# Since: 9.1
> +#
> +# Example:
> +#
> +# <- {"timestamp": {"seconds": 1713771323, "microseconds": 212268},
> +# "event": "VFIO_DEVICE_MIG_STATE_CHANGED",
> +# "data": {"device-id": "vfio_dev1", "device-state": "stop"} }
> +##
> +{ 'event': 'VFIO_DEVICE_MIG_STATE_CHANGED',
> + 'data': {
> + 'device-id': 'str',
> + 'device-state': 'VFIODeviceMigState'
> + } }
> diff --git a/qapi/meson.build b/qapi/meson.build
> index c92af6e063..e7bc54e5d0 100644
> --- a/qapi/meson.build
> +++ b/qapi/meson.build
> @@ -52,6 +52,7 @@ qapi_all_modules = [
> 'stats',
> 'trace',
> 'transaction',
> + 'vfio',
> 'virtio',
> 'yank',
> ]
next prev parent reply other threads:[~2024-05-02 11:20 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-30 5:16 [PATCH 0/3] qapi/vfio: Add VFIO device migration state change QAPI event Avihai Horon
2024-04-30 5:16 ` [PATCH 1/3] " Avihai Horon
2024-05-01 11:50 ` Joao Martins
2024-05-01 12:08 ` Avihai Horon
2024-05-06 4:52 ` Markus Armbruster
2024-05-06 10:07 ` Avihai Horon
2024-05-06 10:36 ` Markus Armbruster
2024-05-06 10:57 ` Avihai Horon
2024-05-02 11:19 ` Markus Armbruster [this message]
2024-05-05 7:48 ` Avihai Horon
2024-05-06 4:35 ` Markus Armbruster
2024-05-06 9:59 ` Avihai Horon
2024-04-30 5:16 ` [PATCH 2/3] vfio/migration: Emit " Avihai Horon
2024-05-01 11:50 ` Joao Martins
2024-05-01 12:28 ` Avihai Horon
2024-05-02 10:22 ` Joao Martins
2024-05-05 7:28 ` Avihai Horon
2024-05-06 4:56 ` Markus Armbruster
2024-05-06 14:38 ` Fabiano Rosas
2024-05-06 15:07 ` Peter Xu
2024-05-07 7:47 ` Avihai Horon
2024-05-07 15:51 ` Peter Xu
2024-05-07 16:21 ` Avihai Horon
2024-04-30 5:16 ` [PATCH 3/3] vfio/migration: Don't emit STOP_COPY state change event twice Avihai Horon
2024-05-06 14:39 ` Cédric Le Goater
2024-05-06 15:01 ` Avihai Horon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87msp88nrg.fsf@pond.sub.org \
--to=armbru@redhat.com \
--cc=alex.williamson@redhat.com \
--cc=avihaih@nvidia.com \
--cc=clg@redhat.com \
--cc=eblake@redhat.com \
--cc=farosas@suse.de \
--cc=joao.m.martins@oracle.com \
--cc=maorg@nvidia.com \
--cc=michael.roth@amd.com \
--cc=peterx@redhat.com \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).