Add a debugfs function to the migration driver in VFIO to provide a step-by-step debugfs information for the migration driver. Changes v16 -> v17 Add separate VFIO_DEBUGFS Kconfig entries. Changes v15 -> v16 Update the calling order of functions to maintain symmetry Changes v14 -> v15 Update the output status value of live migration. Changes v13 -> v14 Split the patchset and keep the vfio debugfs frame. Changes v12 -> v13 Solve the problem of open and close competition to debugfs. Changes v11 -> v12 Update loading conditions of vfio debugfs. Changes v10 -> v11 Delete the device restore function in debugfs. Changes v9 -> v10 Update the debugfs file of the live migration driver. Changes v8 -> v9 Update the debugfs directory structure of vfio. Changes v7 -> v8 Add support for platform devices. Changes v6 -> v7 Fix some code style issues. Changes v5 -> v6 Control the creation of debugfs through the CONFIG_DEBUG_FS. Changes v4 -> v5 Remove the newly added vfio_migration_ops and use seq_printf to optimize the implementation of debugfs. Changes v3 -> v4 Change the migration_debug_operate interface to debug_root file. Changes v2 -> v3 Extend the debugfs function from hisilicon device to vfio. Changes v1 -> v2 Change the registration method of root_debugfs to register with module initialization. Longfang Liu (2): vfio/migration: Add debugfs to live migration driver Documentation: add debugfs description for vfio Documentation/ABI/testing/debugfs-vfio | 25 +++++++ MAINTAINERS | 1 + drivers/vfio/Kconfig | 10 +++ drivers/vfio/Makefile | 1 + drivers/vfio/debugfs.c | 90 ++++++++++++++++++++++++++ drivers/vfio/vfio.h | 14 ++++ drivers/vfio/vfio_main.c | 14 +++- include/linux/vfio.h | 7 ++ include/uapi/linux/vfio.h | 1 + 9 files changed, 161 insertions(+), 2 deletions(-) create mode 100644 Documentation/ABI/testing/debugfs-vfio create mode 100644 drivers/vfio/debugfs.c -- 2.24.0
