[PATCH v3 0/4] VFIO and IOMMU prerequisite stuff for IOMMU nesting support

[Zhenzhong Duan <zhenzhong.duan@intel.com>]

Hi,

The first 6 patches of [1] are all VFIO or IOMMUFD related additions.
Split them out per Cédric and seek for quick acceptance.

I didn't copy changelog from [1] as it's a mix of the whole nesting series.

For who want a quick view of the whole nesting series [2].

Test done:
- VFIO devices hotplug/unplug
- build test on Windows

[1] https://lists.gnu.org/archive/html/qemu-devel/2025-05/msg05002.html
[2] https://github.com/yiliu1765/qemu/tree/zhenzhong/iommufd_nesting.v1.wip

Thanks
Zhenzhong

Changelog:
v3:
- add doc comment update for new field vendor_caps (Eric)

v2:
- report kernel BUG as error instead of assert (Cédric)
- merge patch2 and patch3 (Cédric)
- handle vendor cap check directly from vtd_check_hiod, so patch6 removed (Cédric)
- s/data_ptr/data (Cédric)
- s/totally/total (Donald)

v1:
- changed to save raw data in VendorCaps, so we can keep all vendor structure
  decoding inside the backend and VFIO wouldn't need to care about types nor
  what's inside the data.


Zhenzhong Duan (4):
  backends/iommufd: Add a helper to invalidate user-managed HWPT
  vfio/iommufd: Add properties and handlers to
    TYPE_HOST_IOMMU_DEVICE_IOMMUFD
  vfio/iommufd: Implement [at|de]tach_hwpt handlers
  vfio/iommufd: Save vendor specific device info

 include/system/host_iommu_device.h | 15 ++++++++
 include/system/iommufd.h           | 54 ++++++++++++++++++++++++++++
 backends/iommufd.c                 | 58 ++++++++++++++++++++++++++++++
 hw/vfio/iommufd.c                  | 36 ++++++++++++++++---
 backends/trace-events              |  1 +
 5 files changed, 159 insertions(+), 5 deletions(-)

-- 
2.34.1