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    Subject[PATCH v19 2/3] Documentation: add debugfs description for vfio
    Date
    Add an debugfs document description file to help users understand
    how to use the accelerator live migration driver's debugfs.

    Signed-off-by: Longfang Liu <liulongfang@huawei.com>
    Reviewed-by: Cedric Le Goater <clg@redhat.com>
    ---
    Documentation/ABI/testing/debugfs-vfio | 25 +++++++++++++++++++++++++
    1 file changed, 25 insertions(+)
    create mode 100644 Documentation/ABI/testing/debugfs-vfio

    diff --git a/Documentation/ABI/testing/debugfs-vfio b/Documentation/ABI/testing/debugfs-vfio
    new file mode 100644
    index 000000000000..210eca135979
    --- /dev/null
    +++ b/Documentation/ABI/testing/debugfs-vfio
    @@ -0,0 +1,25 @@
    +What: /sys/kernel/debug/vfio
    +Date: Nov 2023
    +KernelVersion: 6.7
    +Contact: Longfang Liu <liulongfang@huawei.com>
    +Description: This debugfs file directory is used for debugging
    + of vfio devices, it's a common directory for all vfio devices.
    + Vfio core will create a device subdirectory under this
    + directory.
    +
    +What: /sys/kernel/debug/vfio/<device>/migration
    +Date: Nov 2023
    +KernelVersion: 6.7
    +Contact: Longfang Liu <liulongfang@huawei.com>
    +Description: This debugfs file directory is used for debugging
    + of vfio devices that support live migration.
    + The debugfs of each vfio device that supports live migration
    + could be created under this directory.
    +
    +What: /sys/kernel/debug/vfio/<device>/migration/state
    +Date: Nov 2023
    +KernelVersion: 6.7
    +Contact: Longfang Liu <liulongfang@huawei.com>
    +Description: Read the live migration status of the vfio device.
    + The contents of the state file reflects the migration state
    + relative to those defined in the vfio_device_mig_state enum
    --
    2.24.0
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