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.duan@intel.com/
[2] 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:
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