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 v5 since v4: https://lore.kernel.org/kvm/20240228143402.89219-9-xin.zeng@xxxxxxxxx - Remove device ID recheck as no consensus has been reached yet (Kevin) - Add missing state PRE_COPY_P2P in precopy_iotcl (Kevin) - Rearrange the state transition flow for better readability (Kevin) - Remove unnecessary Reviewed-by in commit message (Kevin) Changes in v4 since v3: https://lore.kernel.org/kvm/20240221155008.960369-11-xin.zeng@xxxxxxxxx - Change the order of maintainer entry for QAT vfio pci driver in MAINTAINERS to make it alphabetical (Alex) - Put QAT VFIO PCI driver under vfio/pci directly instead of vfio/pci/intel (Alex) - Add id_table recheck during device probe (Alex) Changes in v3 since v2: https://lore.kernel.org/kvm/20240220032052.66834-1-xin.zeng@xxxxxxxxx - Use state_mutex directly instead of unnecessary deferred_reset mode (Jason) Changes in v2 since v1: https://lore.kernel.org/all/20240201153337.4033490-1-xin.zeng@xxxxxxxxx - 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 since RFC: https://lore.kernel.org/all/20230630131304.64243-1-xin.zeng@xxxxxxxxx - 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/qat/Kconfig | 12 + drivers/vfio/pci/qat/Makefile | 3 + drivers/vfio/pci/qat/main.c | 662 +++++++++++ include/linux/qat/qat_mig_dev.h | 31 + 38 files changed, 3344 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/qat/Kconfig create mode 100644 drivers/vfio/pci/qat/Makefile create mode 100644 drivers/vfio/pci/qat/main.c create mode 100644 include/linux/qat/qat_mig_dev.h base-commit: 318407ed77e4140d02e43a001b1f4753e3ce6b5f -- 2.18.2
