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: 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>

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vfio/iommufd: change process

Finish CPR by change the owning process of the iommufd device in
post load.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Zhenzhong Duan <zhenzh

vfio/iommufd: change process

Finish CPR by change the owning process of the iommufd device in
post load.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Link: https://lore.kernel.org/qemu-devel/1751493538-202042-19-git-send-email-steven.sistare@oracle.com
[ clg: Fixed missing "qemu/error-report.h" include ]
Signed-off-by: Cédric Le Goater <clg@redhat.com>

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vfio/iommufd: preserve descriptors

Save the iommu and vfio device fd in CPR state when it is created.
After CPR, the fd number is found in CPR state and reused.

Signed-off-by: Steve Sistare <steven

vfio/iommufd: preserve descriptors

Save the iommu and vfio device fd in CPR state when it is created.
After CPR, the fd number is found in CPR state and reused.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Link: https://lore.kernel.org/qemu-devel/1751493538-202042-16-git-send-email-steven.sistare@oracle.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

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vfio/iommufd: cpr state

VFIO iommufd devices will need access to ioas_id, devid, and hwpt_id in
new QEMU at realize time, so add them to CPR state. Define CprVFIODevice
as the object which holds th

vfio/iommufd: cpr state

VFIO iommufd devices will need access to ioas_id, devid, and hwpt_id in
new QEMU at realize time, so add them to CPR state. Define CprVFIODevice
as the object which holds the state and is serialized to the vmstate file.
Define accessors to copy state between VFIODevice and CprVFIODevice.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Link: https://lore.kernel.org/qemu-devel/1751493538-202042-15-git-send-email-steven.sistare@oracle.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

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migration: vfio cpr state hook

Define a list of vfio devices in CPR state, in a subsection so that
older QEMU can be live updated to this version. However, new QEMU
will not be live updateable to o

migration: vfio cpr state hook

Define a list of vfio devices in CPR state, in a subsection so that
older QEMU can be live updated to this version. However, new QEMU
will not be live updateable to old QEMU. This is acceptable because
CPR is not yet commonly used, and updates to older versions are unusual.

The contents of each device object will be defined by the vfio subsystem
in a subsequent patch.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Link: https://lore.kernel.org/qemu-devel/1751493538-202042-14-git-send-email-steven.sistare@oracle.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

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vfio/iommufd: register container for cpr

Register a vfio iommufd container and device for CPR, replacing the generic
CPR register call with a more specific iommufd register call. Add a
blocker if t

vfio/iommufd: register container for cpr

Register a vfio iommufd container and device for CPR, replacing the generic
CPR register call with a more specific iommufd register call. Add a
blocker if the kernel does not support IOMMU_IOAS_CHANGE_PROCESS.

This is mostly boiler plate. The fields to to saved and restored are added
in subsequent patches.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Link: https://lore.kernel.org/qemu-devel/1751493538-202042-13-git-send-email-steven.sistare@oracle.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

show more ...