-----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