-----Original Message----- From: liulongfang liulongfang@huawei.com Sent: Tuesday, July 30, 2024 1:15 PM To: alex.williamson@redhat.com; jgg@nvidia.com; Shameerali Kolothum Thodi shameerali.kolothum.thodi@huawei.com; Jonathan Cameron jonathan.cameron@huawei.com Cc: kvm@vger.kernel.org; linux-kernel@vger.kernel.org; linuxarm@openeuler.org; liulongfang liulongfang@huawei.com Subject: [PATCH v7 4/4] Documentation: add debugfs description for hisi migration

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@huawei.com

.../ABI/testing/debugfs-hisi-migration | 25 +++++++++++++++++++ 1 file changed, 25 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..053f3ebba9b1 --- /dev/null +++ b/Documentation/ABI/testing/debugfs-hisi-migration @@ -0,0 +1,25 @@ +What: /sys/kernel/debug/vfio/<device>/migration/hisi_acc/dev_data +Date: Jul 2024 +KernelVersion: 6.11 +Contact: Longfang Liu liulongfang@huawei.com +Description: Read the configuration data and some status data

• required for device live migration. These data include device
  

• status data, queue configuration data, some task
  

configuration

• data and device attribute data. The output format of the data
  

• is defined by the live migration driver.
  

+What: /sys/kernel/debug/vfio/<device>/migration/hisi_acc/migf_data +Date: Jul 2024 +KernelVersion: 6.11 +Contact: Longfang Liu liulongfang@huawei.com +Description: Read the data from the last completed live migration.

• This data includes the same device status data as in
  

"dev_data".

• And some device status data after the migration is
  

completed.

Actually what info is different from dev_data here? Only that it is the dev_data after a migration is attempted/completed, right?

Thanks, Shameer

+What: /sys/kernel/debug/vfio/<device>/migration/hisi_acc/cmd_state +Date: Jul 2024 +KernelVersion: 6.11 +Contact: Longfang Liu liulongfang@huawei.com +Description: Used to obtain the device command sending and receiving

• channel status. Returns failure or success logs based on the
  

• results.
  

-- 2.24.0