[v3,00/10] crypto: qat - enable QAT GEN4 SRIOV VF live migration for QAT GEN4

Message

Xin Zeng Feb. 21, 2024, 3:49 p.m. UTC

This set enables live migration for Intel QAT GEN4 SRIOV Virtual
Functions (VFs).
It is composed of 10 patches. Patch 1~6 refactor the original QAT PF
driver implementation which will be reused by the following patches.
Patch 7 introduces the logic to the QAT PF driver that allows to save
and restore the state of a bank (a QAT VF is a wrapper around banks) and
drain a ring pair. Patch 8 adds the QAT PF driver a set of interfaces to
allow to save and restore the state of a VF that will be called by the
module qat_vfio_pci which will be introduced in the last patch. Patch 9
implements the defined device interfaces. The last one adds a vfio pci
extension specific for QAT which intercepts the vfio device operations
for a QAT VF to allow live migration.

Here are the steps required to test the live migration of a QAT GEN4 VF:
1. Bind one or more QAT GEN4 VF devices to the module qat_vfio_pci.ko 
2. Assign the VFs to the virtual machine and enable device live
migration 
3. Run a workload using a QAT VF inside the VM, for example using qatlib
(https://github.com/intel/qatlib) 
4. Migrate the VM from the source node to a destination node

Changes in v3 from v2: https://lore.kernel.org/kvm/[e-mail]
-  Use state_mutex directly instead of unnecessary deferred_reset
   mode (Jason)

Changes in v2 from v1: https://lore.kernel.org/all/[e-mail]
-  Add VFIO_MIGRATION_PRE_COPY support (Alex)
-  Remove unnecessary module dependancy in Kconfig (Alex)
-  Use direct function calls instead of function pointers in qat vfio
   variant driver (Jason)
-  Address the comments including uncessary pointer check and kfree,
   missing lock and direct use of pci_iov_vf_id (Shameer)
-  Change CHECK_STAT macro to avoid repeat comparison (Kamlesh)

Changes in v1 from RFC: https://lore.kernel.org/all/[e-mail]
-  Address comments including the right module dependancy in Kconfig,
   source file name and module description (Alex)
-  Added PCI error handler and P2P state handler (Suggested by Kevin)
-  Refactor the state check duing loading ring state (Kevin) 
-  Fix missed call to vfio_put_device in the error case (Breet)
-  Migrate the shadow states in PF driver
-  Rebase on top of 6.8-rc1

Giovanni Cabiddu (2):
  crypto: qat - adf_get_etr_base() helper
  crypto: qat - relocate CSR access code

Siming Wan (3):
  crypto: qat - rename get_sla_arr_of_type()
  crypto: qat - expand CSR operations for QAT GEN4 devices
  crypto: qat - add bank save and restore flows

Xin Zeng (5):
  crypto: qat - relocate and rename 4xxx PF2VM definitions
  crypto: qat - move PFVF compat checker to a function
  crypto: qat - add interface for live migration
  crypto: qat - implement interface for live migration
  vfio/qat: Add vfio_pci driver for Intel QAT VF devices

 MAINTAINERS                                   |    8 +
 .../intel/qat/qat_420xx/adf_420xx_hw_data.c   |    3 +
 .../intel/qat/qat_4xxx/adf_4xxx_hw_data.c     |    5 +
 .../intel/qat/qat_c3xxx/adf_c3xxx_hw_data.c   |    1 +
 .../qat/qat_c3xxxvf/adf_c3xxxvf_hw_data.c     |    1 +
 .../intel/qat/qat_c62x/adf_c62x_hw_data.c     |    1 +
 .../intel/qat/qat_c62xvf/adf_c62xvf_hw_data.c |    1 +
 drivers/crypto/intel/qat/qat_common/Makefile  |    6 +-
 .../intel/qat/qat_common/adf_accel_devices.h  |   88 ++
 .../intel/qat/qat_common/adf_common_drv.h     |   10 +
 .../qat/qat_common/adf_gen2_hw_csr_data.c     |  101 ++
 .../qat/qat_common/adf_gen2_hw_csr_data.h     |   86 ++
 .../intel/qat/qat_common/adf_gen2_hw_data.c   |   97 --
 .../intel/qat/qat_common/adf_gen2_hw_data.h   |   76 --
 .../qat/qat_common/adf_gen4_hw_csr_data.c     |  231 ++++
 .../qat/qat_common/adf_gen4_hw_csr_data.h     |  188 +++
 .../intel/qat/qat_common/adf_gen4_hw_data.c   |  380 +++++--
 .../intel/qat/qat_common/adf_gen4_hw_data.h   |  127 +--
 .../intel/qat/qat_common/adf_gen4_pfvf.c      |    8 +-
 .../intel/qat/qat_common/adf_gen4_vf_mig.c    | 1010 +++++++++++++++++
 .../intel/qat/qat_common/adf_gen4_vf_mig.h    |   10 +
 .../intel/qat/qat_common/adf_mstate_mgr.c     |  318 ++++++
 .../intel/qat/qat_common/adf_mstate_mgr.h     |   89 ++
 .../intel/qat/qat_common/adf_pfvf_pf_proto.c  |    8 +-
 .../intel/qat/qat_common/adf_pfvf_utils.h     |   11 +
 drivers/crypto/intel/qat/qat_common/adf_rl.c  |   10 +-
 drivers/crypto/intel/qat/qat_common/adf_rl.h  |    2 +
 .../crypto/intel/qat/qat_common/adf_sriov.c   |    7 +-
 .../intel/qat/qat_common/adf_transport.c      |    4 +-
 .../crypto/intel/qat/qat_common/qat_mig_dev.c |  130 +++
 .../qat/qat_dh895xcc/adf_dh895xcc_hw_data.c   |    1 +
 .../qat_dh895xccvf/adf_dh895xccvf_hw_data.c   |    1 +
 drivers/vfio/pci/Kconfig                      |    2 +
 drivers/vfio/pci/Makefile                     |    2 +
 drivers/vfio/pci/intel/qat/Kconfig            |   12 +
 drivers/vfio/pci/intel/qat/Makefile           |    3 +
 drivers/vfio/pci/intel/qat/main.c             |  663 +++++++++++
 include/linux/qat/qat_mig_dev.h               |   31 +
 38 files changed, 3345 insertions(+), 387 deletions(-)
 create mode 100644 drivers/crypto/intel/qat/qat_common/adf_gen2_hw_csr_data.c
 create mode 100644 drivers/crypto/intel/qat/qat_common/adf_gen2_hw_csr_data.h
 create mode 100644 drivers/crypto/intel/qat/qat_common/adf_gen4_hw_csr_data.c
 create mode 100644 drivers/crypto/intel/qat/qat_common/adf_gen4_hw_csr_data.h
 create mode 100644 drivers/crypto/intel/qat/qat_common/adf_gen4_vf_mig.c
 create mode 100644 drivers/crypto/intel/qat/qat_common/adf_gen4_vf_mig.h
 create mode 100644 drivers/crypto/intel/qat/qat_common/adf_mstate_mgr.c
 create mode 100644 drivers/crypto/intel/qat/qat_common/adf_mstate_mgr.h
 create mode 100644 drivers/crypto/intel/qat/qat_common/qat_mig_dev.c
 create mode 100644 drivers/vfio/pci/intel/qat/Kconfig
 create mode 100644 drivers/vfio/pci/intel/qat/Makefile
 create mode 100644 drivers/vfio/pci/intel/qat/main.c
 create mode 100644 include/linux/qat/qat_mig_dev.h


base-commit: a821f4cadc99272701016641bc821182fdfca289