How to load usigned char to __m512i on KNL

How can I load the unsigned char to a __m512i vector on KNL?

I can't find the similar instrinsic like extload(I use extload on KNC) on KNL. On the other hand the AVX512-BW is not supported on KNL as well, so I can't use  _mm512_mask_load_epi8 to load a uint8. Is there anyway could load the unsigned char efficiently to a __m512i?

Thank you