probe_vls
probe_vls("SVE", sve_vls, &sve_vl_count, PR_SVE_SET_VL);
probe_vls("SME", sme_vls, &sme_vl_count, PR_SME_SET_VL);
probe_vls(sve_vls, &sve_vl_count, PR_SVE_SET_VL);
probe_vls(sme_vls, &sme_vl_count, PR_SME_SET_VL);