[PATCH v4 4/5] Documentation: add debugfs description for hisi_acc_vfio_pci

[Longfang Liu]

Add a debugfs document description file to help users understand
how to use the accelerator live migration driver's debugfs.

Signed-off-by: Longfang Liu <liulongfang@xxxxxxxxxx>
---
 .../ABI/testing/debugfs-hisi-migration        | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 Documentation/ABI/testing/debugfs-hisi-migration

diff --git a/Documentation/ABI/testing/debugfs-hisi-migration b/Documentation/ABI/testing/debugfs-hisi-migration
new file mode 100644
index 000000000000..a8cfc7688b88
--- /dev/null
+++ b/Documentation/ABI/testing/debugfs-hisi-migration
@@ -0,0 +1,32 @@
+What:		/sys/kernel/debug/vfio_mig/<bdf>/state
+Date:		Nov 2022
+Contact:	linux-kernel@xxxxxxxxxxxxxxx
+Description:	Read the live migration status of the VF device.
+		The status of these live migrations includes:
+		ERROR, RUNNING, STOP, STOP_COPY, RESUMING.
+
+What:		/sys/kernel/debug/vfio_mig/<bdf>/mig_data
+Date:		Nov 2022
+Contact:	linux-kernel@xxxxxxxxxxxxxxx
+Description:	Read the live migration data of the VF device.
+		The output format of the data is defined by the live
+		migration driver.
+
+What:		/sys/kernel/debug/vfio_mig/<bdf>/mig_attr
+Date:		Nov 2022
+Contact:	linux-kernel@xxxxxxxxxxxxxxx
+Description:	Read the live migration attributes of the VF device.
+		The output format of the attributes is defined by the live
+		migration driver.
+
+What:		/sys/kernel/debug/vfio_mig/<bdf>/debug
+Date:		Nov 2022
+Contact:	linux-kernel@xxxxxxxxxxxxxxx
+Description:	This debug file supports "echo" command	write operations.
+		The command is actually represented by an integer number, and the
+		specific meaning is defined by the corresponding device driver.
+		For example, three commands are defined in the HiSilicon accelerator
+		live migration driver:
+		0: State save
+		1: State resume
+		2: IO test
-- 
2.24.0