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

[Duan, Zhenzhong]

>-----Original Message-----
>From: Eric Auger <eric.auger@redhat.com>
>Subject: Re: [PATCH v1 00/11] Add a host IOMMU device abstraction
>
>
>
>On 2/28/24 04:58, Zhenzhong Duan wrote:
>> 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
>Introduce, here and below

Good catch, will fix.

Thanks
Zhenzhong

>
>Eric
>> 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_pre
>q_part1_v1
>>
>> [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:
>> 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
>>