linux-kernel - Re: [PATCH v7 4/4] Documentation: add debugfs description for hisi migration

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <26fbc580-c626-db9f-44b5-40f7e47b7928@huawei.com>
Date: Tue, 6 Aug 2024 16:37:59 +0800
From: liulongfang <liulongfang@...wei.com>
To: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@...wei.com>,
	"alex.williamson@...hat.com" <alex.williamson@...hat.com>, "jgg@...dia.com"
	<jgg@...dia.com>, Jonathan Cameron <jonathan.cameron@...wei.com>
CC: "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linuxarm@...neuler.org" <linuxarm@...neuler.org>
Subject: Re: [PATCH v7 4/4] Documentation: add debugfs description for hisi
 migration

On 2024/8/5 17:09, Shameerali Kolothum Thodi wrote:
> 
> 
>> -----Original Message-----
>> From: liulongfang <liulongfang@...wei.com>
>> Sent: Tuesday, July 30, 2024 1:15 PM
>> To: alex.williamson@...hat.com; jgg@...dia.com; Shameerali Kolothum
>> Thodi <shameerali.kolothum.thodi@...wei.com>; Jonathan Cameron
>> <jonathan.cameron@...wei.com>
>> Cc: kvm@...r.kernel.org; linux-kernel@...r.kernel.org;
>> linuxarm@...neuler.org; liulongfang <liulongfang@...wei.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@...wei.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@...wei.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@...wei.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?
>

Yes, the only difference is: The mig_data is the dev_data that is migrated.

Thanks.
Longfang.

> Thanks,
> Shameer
> 
>> +
>> +What:
>> 	/sys/kernel/debug/vfio/<device>/migration/hisi_acc/cmd_state
>> +Date:		Jul 2024
>> +KernelVersion:  6.11
>> +Contact:	Longfang Liu <liulongfang@...wei.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
> 
> .
>