Merge tag 'pull-vfio-20260126' of https://github.com/legoater/qemu into staging

vfio queue:

* Fixes for vfio-user and CPR
* Fixes issues detected by Coverity
* Updates linux-headers to Linux v6.19-rc1
* Adds support for the creation of dma-buf objects for PCI BARs. This
  allows safe P2P DMA operations when using iommufd host backend.

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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]

* tag 'pull-vfio-20260126' of https://github.com/legoater/qemu:
  vfio-user: update VFIOProxy flag constants to use the BIT() macro
  vfio-user: fix VFIO_PROXY_USE_MULTI constant value
  hw/vfio/region: Create dmabuf for PCI BAR per region
  hw/vfio: Add helper to retrieve device feature
  linux-headers: Update to Linux v6.19-rc1
  hw/vfio: cpr-iommufd: Fix wrong usage of migrate_add_blocker_modes
  vfio/migration: Fix page size calculation

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>