Hi, This series attempts to add vfio live migration support for HiSilicon ACC VF devices based on the new v2 migration protocol definition and mlx5 v9 series discussed here[0]. v7 --> v8 - Dropped PRE_COPY support and early compatibility checking based on the discussion here[1]. - Addressed comments from John, Jason & Alex (Thanks!). This is sanity tested on a HiSilicon platform using the Qemu branch provided here[2]. Please take a look and let me know your feedback. Thanks, Shameer [0] https://lore.kernel.org/kvm/20220224142024.147653-1-yishaih@xxxxxxxxxx/ [1] https://lore.kernel.org/kvm/20220302133159.3c803f56.alex.williamson@xxxxxxxxxx/ [2] https://github.com/jgunthorpe/qemu/commits/vfio_migration_v2 v6 --> v7 -Renamed MIG_PRECOPY ioctl name and struct name. Updated ioctl descriptions regarding ioctl validity (patch #7). - Adressed comments from Jason and Alex on PRE_COPY read() and ioctl() fns (patch #9). - Moved only VF PCI ids to pci_ids.h(patch #3). v5 --> v6 -Report PRE_COPY support and use that for early compatibility check between src and dst devices. -For generic PRE_COPY support, included patch #7 from Jason(Thanks!). -Addressed comments from Alex(Thanks!). -Added the QM state register update to QM driver(patch #8) since that is being used in migration driver to decide whether the device is ready to save the state. RFCv4 --> v5 - Dropped RFC tag as v2 migration APIs are more stable now. - Addressed review comments from Jason and Alex (Thanks!). v3 --> RFCv4 -Based on migration v2 protocol and mlx5 v7 series. -Added RFC tag again as migration v2 protocol is still under discussion. -Added new patch #6 to retrieve the PF QM data. -PRE_COPY compatibility check is now done after the migration data transfer. This is not ideal and needs discussion. RFC v2 --> v3 -Dropped RFC tag as the vfio_pci_core subsystem framework is now part of 5.15-rc1. -Added override methods for vfio_device_ops read/write/mmap calls to limit the access within the functional register space. -Patches 1 to 3 are code refactoring to move the common ACC QM definitions and header around. RFCv1 --> RFCv2 -Adds a new vendor-specific vfio_pci driver(hisi-acc-vfio-pci) for HiSilicon ACC VF devices based on the new vfio-pci-core framework proposal. -Since HiSilicon ACC VF device MMIO space contains both the functional register space and migration control register space, override the vfio_device_ops ioctl method to report only the functional space to VMs. -For a successful migration, we still need access to VF dev functional register space mainly to read the status registers. But accessing these while the Guest vCPUs are running may leave a security hole. To avoid any potential security issues, we map/unmap the MMIO regions on a need basis and is safe to do so. (Please see hisi_acc_vf_ioremap/unmap() fns in patch #4). -Dropped debugfs support for now. -Uses common QM functions for mailbox access(patch #3). Longfang Liu (3): crypto: hisilicon/qm: Move few definitions to common header crypto: hisilicon/qm: Set the VF QM state register hisi_acc_vfio_pci: Add support for VFIO live migration Shameer Kolothum (6): crypto: hisilicon/qm: Move the QM header to include/linux hisi_acc_qm: Move VF PCI device IDs to common header hisi_acc_vfio_pci: add new vfio_pci driver for HiSilicon ACC devices hisi_acc_vfio_pci: Restrict access to VF dev BAR2 migration region hisi_acc_vfio_pci: Add helper to retrieve the struct pci_driver hisi_acc_vfio_pci: Use its own PCI reset_done error handler drivers/crypto/hisilicon/hpre/hpre.h | 2 +- drivers/crypto/hisilicon/hpre/hpre_main.c | 19 +- drivers/crypto/hisilicon/qm.c | 68 +- drivers/crypto/hisilicon/sec2/sec.h | 2 +- drivers/crypto/hisilicon/sec2/sec_main.c | 21 +- drivers/crypto/hisilicon/sgl.c | 2 +- drivers/crypto/hisilicon/zip/zip.h | 2 +- drivers/crypto/hisilicon/zip/zip_main.c | 17 +- drivers/vfio/pci/Kconfig | 2 + drivers/vfio/pci/Makefile | 2 + drivers/vfio/pci/hisilicon/Kconfig | 17 + drivers/vfio/pci/hisilicon/Makefile | 4 + .../vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 1319 +++++++++++++++++ .../vfio/pci/hisilicon/hisi_acc_vfio_pci.h | 116 ++ .../qm.h => include/linux/hisi_acc_qm.h | 49 + include/linux/pci_ids.h | 3 + 16 files changed, 1579 insertions(+), 66 deletions(-) create mode 100644 drivers/vfio/pci/hisilicon/Kconfig create mode 100644 drivers/vfio/pci/hisilicon/Makefile create mode 100644 drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c create mode 100644 drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.h rename drivers/crypto/hisilicon/qm.h => include/linux/hisi_acc_qm.h (87%) -- 2.25.1
