[PATCH v1 00/11] Add a host IOMMU device abstraction

[Zhenzhong Duan]

Hi,

Based on Joao's suggestion, the iommufd nesting prerequisite series [1]
is further splitted to host IOMMU device abstract part and vIOMMU
check/sync part. This series implements the 1st part.

This split also faciliates the dirty tracking series [2] and virtio-iommu
series [3] to depend on 1st part.

PATCH1-3: Introduce HostIOMMUDevice and two sub class
PATCH4: Define HostIOMMUDevice handle in VFIODevice
PATCH5-8: Introdcue host_iommu_device_create callback to allocate and intialize 
HostIOMMUDevice
PATCH9-10: Introdcue set/unset_iommu_device to pass HostIOMMUDevice to vIOMMU
PATCH11: a helper to get host IOMMU info

Because it's becoming clear on community's suggestion, I'd like to remove
rfc tag from this version.

Qemu code can be found at:
https://github.com/yiliu1765/qemu/tree/zhenzhong/iommufd_nesting_preq_part1_v1

[1] 
20240201072818.327930-1-zhenzhong.duan@intel.com/">https://lore.kernel.org/qemu-devel/20240201072818.327930-1-zhenzhong.duan@intel.com/
[2] 
20240212135643.5858-1-joao.m.martins@oracle.com/">https://lore.kernel.org/qemu-devel/20240212135643.5858-1-joao.m.martins@oracle.com/
[3] 
https://lore.kernel.org/qemu-devel/20240117080414.316890-1-eric.auger@redhat.com/

Thanks
Zhenzhong

Changelog:
v1:
- use HostIOMMUDevice handle instead of union in VFIODevice (Eric)
- change host_iommu_device_init to host_iommu_device_create
- allocate HostIOMMUDevice in host_iommu_device_create callback
  and set the VFIODevice base_hdev handle (Eric)
- refine pci_device_set/unset_iommu_device doc (Eric)
- use HostIOMMUDevice handle instead of union in VTDHostIOMMUDevice (Eric)

rfcv2:
- introduce common abstract HostIOMMUDevice and sub struct for different BEs 
(Eric, Cédric)
- remove iommufd_device.[ch] (Cédric)
- remove duplicate iommufd/devid define from VFIODevice (Eric)
- drop the p in aliased_pbus and aliased_pdevfn (Eric)
- assert devfn and iommu_bus in pci_device_get_iommu_bus_devfn (Cédric, Eric)
- use errp in iommufd_device_get_info (Eric)
- split and simplify cap/ecap check/sync code in intel_iommu.c (Cédric)
- move VTDHostIOMMUDevice declaration to intel_iommu_internal.h (Cédric)
- make '(vtd->cap_reg >> 16) & 0x3fULL' a MACRO and add missed '+1' (Cédric)
- block migration if vIOMMU cap/ecap updated based on host IOMMU cap/ecap
- add R-B


Yi Liu (1):
  hw/pci: Introduce pci_device_set/unset_iommu_device()

Zhenzhong Duan (10):
  Introduce a common abstract struct HostIOMMUDevice
  backends/iommufd: Introduce IOMMUFDDevice
  vfio: Introduce IOMMULegacyDevice
  vfio: Add HostIOMMUDevice handle into VFIODevice
  vfio: Introduce host_iommu_device_create callback
  vfio/container: Implement host_iommu_device_create callback in legacy
    mode
  vfio/iommufd: Implement host_iommu_device_create callback in iommufd
    mode
  vfio/pci: Allocate and initialize HostIOMMUDevice after attachment
  vfio: Pass HostIOMMUDevice to vIOMMU
  backends/iommufd: Introduce helper function iommufd_device_get_info()

 include/hw/pci/pci.h                  | 38 +++++++++++++++-
 include/hw/vfio/vfio-common.h         |  8 ++++
 include/hw/vfio/vfio-container-base.h |  1 +
 include/sysemu/host_iommu_device.h    | 22 ++++++++++
 include/sysemu/iommufd.h              | 19 ++++++++
 backends/iommufd.c                    | 32 +++++++++++++-
 hw/pci/pci.c                          | 62 +++++++++++++++++++++++++--
 hw/vfio/common.c                      |  8 ++++
 hw/vfio/container.c                   |  9 ++++
 hw/vfio/iommufd.c                     | 10 +++++
 hw/vfio/pci.c                         | 24 ++++++++---
 11 files changed, 223 insertions(+), 10 deletions(-)
 create mode 100644 include/sysemu/host_iommu_device.h

-- 
2.34.1