[PATCH] kunit: Mark filter_glob param as rw

[Lucas De Marchi]

On Thu, Jan 18, 2024 at 05:23:33PM -0500, Rae Moar wrote:
>On Thu, Jan 11, 2024 at 7:13 PM Lucas De Marchi
><lucas.demarchi at intel.com> wrote:
>>
>> By allowing the filter_glob parameter to be written to, it's possible to
>> tweak the testsuites that will be executed on new module loads. This
>> makes it easier to run specific tests without having to reload kunit and
>> provides a way to filter tests on real HW even if kunit is builtin.
>> Example for xe driver:
>>
>> 1) Run just 1 test
>>         # echo -n xe_bo > /sys/module/kunit/parameters/filter_glob
>>         # modprobe -r xe_live_test
>>         # modprobe xe_live_test
>>         # ls /sys/kernel/debug/kunit/
>>         xe_bo
>>
>> 2) Run all tests
>>         # echo \* > /sys/module/kunit/parameters/filter_glob
>>         # modprobe -r xe_live_test
>>         # modprobe xe_live_test
>>         # ls /sys/kernel/debug/kunit/
>>         xe_bo  xe_dma_buf  xe_migrate  xe_mocs
>>
>> References: https://lore.kernel.org/intel-xe/dzacvbdditbneiu3e3fmstjmttcbne44yspumpkd6sjn56jqpk@vxu7sksbqrp6/
>> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
>
>Hello!
>
>I have tested this and this looks good to me. I agree this is very
>helpful and I wonder if we should do the same with the other module
>parameters (filter, filter_action).

yeah, after I sent this I was wondering about the other parameters. I
don't have a use for them right now, but I can try a few things and spin
a new version if people find it useful.

>
>It did worry me to make filter_glob writable due to the recent patch
>that requires the output of filtering to be a valid virtual address
>but I think there is a sufficient amount of checking of filter_glob.
>
>Thanks!
>-Rae
>
>Reviewed-by: Rae Moar <rmoar at google.com>

thanks
Lucas De Marchi