[PATCH 3/3] Documentation: add debugfs description for hisi migration

From: Longfang Liu
Date: Thu Jan 25 2024 - 03:01:48 EST


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

Update the file paths that need to be maintained in MAINTAINERS

Signed-off-by: Longfang Liu <liulongfang@xxxxxxxxxx>
---
.../ABI/testing/debugfs-hisi-migration | 34 +++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 35 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..d61255c3bcd9
--- /dev/null
+++ b/Documentation/ABI/testing/debugfs-hisi-migration
@@ -0,0 +1,34 @@
+What: /sys/kernel/debug/vfio/<device>/migration/hisi_acc/data
+Date: JAN 2024
+KernelVersion: 6.8
+Contact: Longfang Liu <liulongfang@xxxxxxxxxx>
+Description: Read the live migration data of the vfio device.
+ These data include device status data, queue configuration
+ data and some task configuration data.
+ The output format of the data is defined by the live
+ migration driver.
+
+What: /sys/kernel/debug/vfio/<device>/migration/hisi_acc/attr
+Date: JAN 2024
+KernelVersion: 6.8
+Contact: Longfang Liu <liulongfang@xxxxxxxxxx>
+Description: Read the live migration attributes of the vfio device.
+ it include device status attributes and data length attributes
+ The output format of the attributes is defined by the live
+ migration driver.
+
+What: /sys/kernel/debug/vfio/<device>/migration/hisi_acc/cmd_state
+Date: JAN 2024
+KernelVersion: 6.8
+Contact: Longfang Liu <liulongfang@xxxxxxxxxx>
+Description: Used to obtain the device command sending and receiving
+ channel status. If successful, returns the command value.
+ If failed, return error log.
+
+What: /sys/kernel/debug/vfio/<device>/migration/hisi_acc/save
+Date: JAN 2024
+KernelVersion: 6.8
+Contact: Longfang Liu <liulongfang@xxxxxxxxxx>
+Description: Trigger the Hisilicon accelerator device to perform
+ the state saving operation of live migration through the read
+ operation, and output the operation log results.
diff --git a/MAINTAINERS b/MAINTAINERS
index 20f8e9872deb..115d43d307e8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -22856,6 +22856,7 @@ M: Longfang Liu <liulongfang@xxxxxxxxxx>
M: Shameer Kolothum <shameerali.kolothum.thodi@xxxxxxxxxx>
L: kvm@xxxxxxxxxxxxxxx
S: Maintained
+F: Documentation/ABI/testing/debugfs-hisi-migration
F: drivers/vfio/pci/hisilicon/

VFIO MEDIATED DEVICE DRIVERS
--
2.24.0