Merge tag 'pull-vfio-20250715' of https://github.com/legoater/qemu into staging

vfio queue:

* Fixed vfio-user issues reported by Coverity
* Tweaked VFIO migration with multifd to support aarch64
*

Merge tag 'pull-vfio-20250715' of https://github.com/legoater/qemu into staging

vfio queue:

* Fixed vfio-user issues reported by Coverity
* Tweaked VFIO migration with multifd to support aarch64
* Introduced a property to override a device PCI class code

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# gpg: Signature made Tue 15 Jul 2025 11:22:08 EDT
# gpg: using RSA key A0F66548F04895EBFE6B0B6051A343C7CFFBECA1
# gpg: Good signature from "Cédric Le Goater <clg@redhat.com>" [full]
# gpg: aka "Cédric Le Goater <clg@kaod.org>" [full]
# Primary key fingerprint: A0F6 6548 F048 95EB FE6B 0B60 51A3 43C7 CFFB ECA1

* tag 'pull-vfio-20250715' of https://github.com/legoater/qemu:
vfio/migration: Max in-flight VFIO device state buffers size limit
vfio/migration: Add x-migration-load-config-after-iter VFIO property
vfio/pci: Introduce x-pci-class-code option
hw/vfio-user: fix use of uninitialized variable
hw/vfio-user: wait for proxy close correctly
hw/vfio: fix region fd initialization
hw/vfio-user: add Cédric Le Goater as a maintainer

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

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hw/vfio-user: fix use of uninitialized variable

Coverity reported:

CID 1611805: Uninitialized variables

in vfio_user_dma_map(). This can occur in the happy path when
->async_ops was not se

hw/vfio-user: fix use of uninitialized variable

Coverity reported:

CID 1611805: Uninitialized variables

in vfio_user_dma_map(). This can occur in the happy path when
->async_ops was not set; as this doesn't typically happen, it wasn't
caught during testing.

Align both map and unmap implementations to initialize ret the same way
to resolve this.

Resolves: Coverity CID 1611805
Fixes: 18e899e6 ("vfio-user: implement VFIO_USER_DMA_MAP/UNMAP")
Reported-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: John Levon <john.levon@nutanix.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Mark Cave-Ayland <mark.caveayland@nutanix.com>
Link: https://lore.kernel.org/qemu-devel/20250715115954.515819-5-john.levon@nutanix.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

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Merge tag 'pull-vfio-20250704' of https://github.com/legoater/qemu into staging

vfio queue:

* Added small cleanups for b4 and scope
* Restricted TDX build to 64-bit target
* Fixed issues introduced

Merge tag 'pull-vfio-20250704' of https://github.com/legoater/qemu into staging

vfio queue:

* Added small cleanups for b4 and scope
* Restricted TDX build to 64-bit target
* Fixed issues introduced in first part of VFIO live update support
* Added full VFIO live update support

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# gpg: Signature made Fri 04 Jul 2025 04:42:59 EDT
# gpg: using RSA key A0F66548F04895EBFE6B0B6051A343C7CFFBECA1
# gpg: Good signature from "Cédric Le Goater <clg@redhat.com>" [full]
# gpg: aka "Cédric Le Goater <clg@kaod.org>" [full]
# Primary key fingerprint: A0F6 6548 F048 95EB FE6B 0B60 51A3 43C7 CFFB ECA1

* tag 'pull-vfio-20250704' of https://github.com/legoater/qemu: (27 commits)
vfio: doc changes for cpr
vfio/container: delete old cpr register
iommufd: preserve DMA mappings
vfio/iommufd: change process
vfio/iommufd: reconstruct hwpt
vfio/iommufd: reconstruct device
vfio/iommufd: preserve descriptors
vfio/iommufd: cpr state
migration: vfio cpr state hook
vfio/iommufd: register container for cpr
vfio/iommufd: device name blocker
vfio/iommufd: add vfio_device_free_name
vfio/iommufd: invariant device name
vfio/iommufd: use IOMMU_IOAS_MAP_FILE
physmem: qemu_ram_get_fd_offset
backends/iommufd: change process ioctl
backends/iommufd: iommufd_backend_map_file_dma
migration: cpr_get_fd_param helper
migration: close kvm after cpr
vfio-pci: preserve INTx
...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

vfio-user: do not register vfio-user container with cpr

As the full cpr implementation is yet to be merged upstream, do not register
the vfio-user container with cpr. Full vfio-user support for cpr

vfio-user: do not register vfio-user container with cpr

As the full cpr implementation is yet to be merged upstream, do not register
the vfio-user container with cpr. Full vfio-user support for cpr can be
merged later as a follow-up series.

Signed-off-by: Mark Cave-Ayland <mark.caveayland@nutanix.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Message-ID: <20250702120043.267634-1-mark.caveayland@nutanix.com>
[ clg: Removed now useless "hw/vfio/vfio-cpr.h" include ]
Signed-off-by: Cédric Le Goater <clg@redhat.com>

show more ...

Merge tag 'pull-vfio-20250626' of https://github.com/legoater/qemu into staging

vfio queue:

* Added several small fixes and cleanups
* Added support for vfio-user client device

# -----BEGIN PGP SI

Merge tag 'pull-vfio-20250626' of https://github.com/legoater/qemu into staging

vfio queue:

* Added several small fixes and cleanups
* Added support for vfio-user client device

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# gpg: Signature made Thu 26 Jun 2025 03:44:44 EDT
# gpg: using RSA key A0F66548F04895EBFE6B0B6051A343C7CFFBECA1
# gpg: Good signature from "Cédric Le Goater <clg@redhat.com>" [full]
# gpg: aka "Cédric Le Goater <clg@kaod.org>" [full]
# Primary key fingerprint: A0F6 6548 F048 95EB FE6B 0B60 51A3 43C7 CFFB ECA1

* tag 'pull-vfio-20250626' of https://github.com/legoater/qemu: (25 commits)
vfio-user: introduce vfio-user protocol specification
docs: add vfio-user documentation
vfio-user: add coalesced posted writes
vfio-user: support posted writes
vfio-user: add 'x-msg-timeout' option
vfio-user: implement VFIO_USER_DMA_READ/WRITE
vfio-user: implement VFIO_USER_DMA_MAP/UNMAP
vfio-user: implement VFIO_USER_DEVICE_RESET
vfio-user: set up container access to the proxy
vfio-user: forward MSI-X PBA BAR accesses to server
vfio-user: implement VFIO_USER_DEVICE_GET/SET_IRQ*
vfio-user: set up PCI in vfio_user_pci_realize()
vfio-user: implement VFIO_USER_REGION_READ/WRITE
vfio-user: implement VFIO_USER_DEVICE_GET_REGION_INFO
vfio-user: implement VFIO_USER_DEVICE_GET_INFO
vfio-user: implement message send infrastructure
vfio-user: implement message receive infrastructure
vfio-user: connect vfio proxy to remote server
vfio-user: add vfio-user class and container
vfio/container: fails mdev hotplug if add migration blocker failed
...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

vfio-user: implement VFIO_USER_DMA_MAP/UNMAP

When the vfio-user container gets mapping updates, share them with the
vfio-user by sending a message; this can include the region fd, allowing
the serve

vfio-user: implement VFIO_USER_DMA_MAP/UNMAP

When the vfio-user container gets mapping updates, share them with the
vfio-user by sending a message; this can include the region fd, allowing
the server to directly mmap() the region as needed.

For performance, we only wait for the message responses when we're doing
with a series of updates via the listener_commit() callback.

Originally-by: John Johnson <john.g.johnson@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: John Levon <john.levon@nutanix.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250625193012.2316242-14-john.levon@nutanix.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

show more ...

vfio-user: set up container access to the proxy

The user container will shortly need access to the underlying vfio-user
proxy; set this up.

Originally-by: John Johnson <john.g.johnson@oracle.com>
S

vfio-user: set up container access to the proxy

The user container will shortly need access to the underlying vfio-user
proxy; set this up.

Originally-by: John Johnson <john.g.johnson@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Signed-off-by: John Levon <john.levon@nutanix.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250625193012.2316242-12-john.levon@nutanix.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

show more ...

vfio-user: implement VFIO_USER_DEVICE_GET_INFO

Add support for getting basic device information.

Originally-by: John Johnson <john.g.johnson@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimts

vfio-user: implement VFIO_USER_DEVICE_GET_INFO

Add support for getting basic device information.

Originally-by: John Johnson <john.g.johnson@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Signed-off-by: John Levon <john.levon@nutanix.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250625193012.2316242-6-john.levon@nutanix.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

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vfio-user: add vfio-user class and container

Introduce basic plumbing for vfio-user with CONFIG_VFIO_USER.

We introduce VFIOUserContainer in hw/vfio-user/container.c, which is a
container type for

vfio-user: add vfio-user class and container

Introduce basic plumbing for vfio-user with CONFIG_VFIO_USER.

We introduce VFIOUserContainer in hw/vfio-user/container.c, which is a
container type for the "IOMMU" type "vfio-iommu-user", and share some
common container code from hw/vfio/container.c.

Add hw/vfio-user/pci.c for instantiating VFIOUserPCIDevice objects,
sharing some common code from hw/vfio/pci.c.

Originally-by: John Johnson <john.g.johnson@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Signed-off-by: John Levon <john.levon@nutanix.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250625193012.2316242-2-john.levon@nutanix.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

show more ...