Identifying a MVP subset of tests for quick validation

Hi,

I was looking for guidance on the testing naming schema so I can run a quick subset of tests which would still give a wide coverage of the SME2 instructions without processing lots of very wide tiles. Currently I'm using the following gtest filter:

./build/kleidiai_test --gtest_filter=*sme2*__M_1__N_1*

but an explanation of the M, N and K parameters would be useful.