Based on Joao's suggestion, the iommufd nesting prerequisite series [1] is further splitted to host IOMMU device abstract part and vIOMMU check 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. The major change in this version is to use QOM, the class tree is as below: HostIOMMUDevice | .get_host_iommu_info() | | .------------------------------------. | | | HIODLegacyVFIO [HIODLegacyVDPA] HIODIOMMUFD | .vdev | [.vdev] | .iommufd | .devid | [.ioas_id] | [.attach_hwpt()] | [.detach_hwpt()] | .----------------------. | | HIODIOMMUFDVFIO [HIODIOMMUFDVDPA] | .vdev | [.vdev] * The classes in [] will be implemented in future. * .ioas_id, .attach/detach_hwpt() will be implemented in nesting series. * .vdev in different class points to different agent device, * i.e., for VFIO it points to VFIODevice. PATCH1-4: Introduce HostIOMMUDevice and its sub classes PATCH5-7: Implement get_host_iommu_info() callback PATCH8-10: Create HostIOMMUDevice instance and pass to vIOMMU Qemu code can be found at: https://github.com/yiliu1765/qemu/tree/zhenzhong/iommufd_nesting_preq_part1_v2 [1] https://lore.kernel.org/qemu-devel/20240201072818.327930-1-zhenzhong.d...@intel.com/ [2] https://lore.kernel.org/qemu-devel/20240212135643.5858-1-joao.m.mart...@oracle.com/ [3] https://lore.kernel.org/qemu-devel/20240117080414.316890-1-eric.au...@redhat.com/ Thanks Zhenzhong Changelog: v2: - use QOM to abstract host IOMMU device and its sub-classes (Cédric) - move host IOMMU device creation in attach_device() (Cédric) - refine pci_device_set/unset_iommu_device doc futher (Eric) - define host IOMMU info format of different backend - implement get_host_iommu_info() for different backend (Cédric) 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 (9): backends: Introduce abstract HostIOMMUDevice vfio: Introduce HIODLegacyVFIO device backends/iommufd: Introduce abstract HIODIOMMUFD device vfio/iommufd: Introduce HIODIOMMUFDVFIO device vfio: Implement get_host_iommu_info() callback backends/iommufd: Introduce helper function iommufd_backend_get_device_info() backends/iommufd: Implement get_host_iommu_info() callback vfio: Create host IOMMU device instance vfio: Pass HostIOMMUDevice to vIOMMU MAINTAINERS | 2 + include/hw/pci/pci.h | 40 +++++++++++++- include/hw/vfio/vfio-common.h | 23 ++++++++ include/sysemu/host_iommu_device.h | 29 ++++++++++ include/sysemu/iommufd.h | 33 ++++++++++++ backends/host_iommu_device.c | 19 +++++++ backends/iommufd.c | 85 ++++++++++++++++++++++++------ hw/pci/pci.c | 75 ++++++++++++++++++++++++-- hw/vfio/container.c | 40 +++++++++++++- hw/vfio/iommufd.c | 19 ++++++- hw/vfio/pci.c | 20 +++++-- backends/Kconfig | 5 ++ backends/meson.build | 1 + 13 files changed, 364 insertions(+), 27 deletions(-) create mode 100644 include/sysemu/host_iommu_device.h create mode 100644 backends/host_iommu_device.c -- 2.34.1