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

# -----BEGIN PGP SIGNATURE-----
#
# iQIzBAABCAAdFiEEoPZlSPBIlev+awtgUaNDx8/77KEFAmhc+mwACgkQUaNDx8/7
# 7KHQShAAwGTjc6yzBaFr9DTKaL6Vszwby5tYdV3vWTsnFj2zBks+5BswohxbnYdk
# Smy5E/F+yCiHI6X4ohI4FRjJgBJplDxZ6bbEgTwZa6ADs7xWAwFWv349KQY9uLpJ
# XV/ACot2b6FZUskv3w1SxQrpzho4ICm3DuLOdAFAvBPRtxyC2aQMLsXTlT+7+5cC
# X8zJB/9mtjWIomYWKRXnYUP/uM1g7QLtyU7d01szvqCfSVUilVlg6Ys7RxnqLG0k
# A1/kxYOrEPHHxMO+YwFuapIfE8Gqihes2K1GfM871JaBT14dMIAZkajmVasbKD16
# Iljz89nEV3UehDP9HADhx3QuXO7fhJ3cxcHvTH0xhUeoks3EgTlUq0VNRRYzu6rQ
# 3P1E3cVaPTmwfoSrhecNIFcln4v/bENdwzYcjh96r9fcFwE+ro4oUTGNKCPYv2t0
# yOoc6PqgiZN7DM89/N2hcesgOun7oOVpMnKhiqHjVe53HoM8bfLojWECKNq9Cz1u
# m0YEHn2gEuEB5l03IguRnAywZq76Jivd6WFmAeXGrHRZ9sfxQCwvImbqMa7QxYpI
# rt+j7RAyP57WVoBPoW8hlaIQmLuIvIgdWwWkwQd2BTIprLpdHJd4SWkL6eqGozpE
# rsaHw+WQZqFoddrl7EUSVY/Z2CfIRr1g/Zo5z4RU9YLtxVxjSPw=
# =sX2P
# -----END PGP SIGNATURE-----
# 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_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>

show more ...

vfio-user: connect vfio proxy to remote server

Introduce the vfio-user "proxy": this is the client code responsible for
sending and receiving vfio-user messages across the control socket.

The new f

vfio-user: connect vfio proxy to remote server

Introduce the vfio-user "proxy": this is the client code responsible for
sending and receiving vfio-user messages across the control socket.

The new files hw/vfio-user/proxy.[ch] contain some basic plumbing for
managing the proxy; initialize the proxy during realization of the
VFIOUserPCIDevice instance.

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/20250625193012.2316242-3-john.levon@nutanix.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

show more ...

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 ...