linux-kernel - Re: [PATCH v18 2/2] Documentation: add debugfs description for vfio

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Message-ID: <f0f1d157-a07a-c5ea-1353-a3400897f278@huawei.com>
Date:   Mon, 6 Nov 2023 14:28:41 +0800
From:   liulongfang <liulongfang@...wei.com>
To:     Cédric Le Goater <clegoate@...hat.com>,
        <alex.williamson@...hat.com>, <jgg@...dia.com>,
        <shameerali.kolothum.thodi@...wei.com>,
        <jonathan.cameron@...wei.com>
CC:     <bcreeley@....com>, <kvm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linuxarm@...neuler.org>
Subject: Re: [PATCH v18 2/2] Documentation: add debugfs description for vfio

On 2023/10/30 14:51, Cédric Le Goater write:
> On 10/28/23 09:54, Longfang Liu wrote:
>> 1.Add an debugfs document description file to help users understand
>> how to use the accelerator live migration driver's debugfs.
>> 2.Update the file paths that need to be maintained in MAINTAINERS
> 
> Should we have 2 patches instead ?
>

It is also good to add a separate patch.

Thanks,
Longfang.

> Anyhow,
> 
> Reviewed-by: Cédric Le Goater <clg@...hat.com>
> 
> Thanks,
> 
> C.
> 
> 
>>
>> Signed-off-by: Longfang Liu <liulongfang@...wei.com>
>> ---
>>   Documentation/ABI/testing/debugfs-vfio | 25 +++++++++++++++++++++++++
>>   MAINTAINERS                            |  1 +
>>   2 files changed, 26 insertions(+)
>>   create mode 100644 Documentation/ABI/testing/debugfs-vfio
>>
>> diff --git a/Documentation/ABI/testing/debugfs-vfio b/Documentation/ABI/testing/debugfs-vfio
>> new file mode 100644
>> index 000000000000..445e9f58f924
>> --- /dev/null
>> +++ b/Documentation/ABI/testing/debugfs-vfio
>> @@ -0,0 +1,25 @@
>> +What:        /sys/kernel/debug/vfio
>> +Date:        Oct 2023
>> +KernelVersion:  6.7
>> +Contact:    Longfang Liu <liulongfang@...wei.com>
>> +Description:    This debugfs file directory is used for debugging
>> +        of vfio devices, it's a common directory for all vfio devices.
>> +        Vfio core will create a device subdirectory under this
>> +        directory.
>> +
>> +What:        /sys/kernel/debug/vfio/<device>/migration
>> +Date:        Oct 2023
>> +KernelVersion:  6.7
>> +Contact:    Longfang Liu <liulongfang@...wei.com>
>> +Description:    This debugfs file directory is used for debugging
>> +        of vfio devices that support live migration.
>> +        The debugfs of each vfio device that supports live migration
>> +        could be created under this directory.
>> +
>> +What:        /sys/kernel/debug/vfio/<device>/migration/state
>> +Date:        Oct 2023
>> +KernelVersion:  6.7
>> +Contact:    Longfang Liu <liulongfang@...wei.com>
>> +Description:    Read the live migration status of the vfio device.
>> +        The contents of the state file reflects the migration state
>> +        relative to those defined in the vfio_device_mig_state enum
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index b19995690904..a6be3b4219c7 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -22591,6 +22591,7 @@ L:    kvm@...r.kernel.org
>>   S:    Maintained
>>   T:    git https://github.com/awilliam/linux-vfio.git
>>   F:    Documentation/ABI/testing/sysfs-devices-vfio-dev
>> +F:    Documentation/ABI/testing/debugfs-vfio
>>   F:    Documentation/driver-api/vfio.rst
>>   F:    drivers/vfio/
>>   F:    include/linux/vfio.h
> 
> .
>