UNION NPS_CORE_GBL_VFCFG(9)

💖 NAME 💖

okay so bestie, welcome to union nps_core_gbl_vfcfg(9) straight outta the Kernel API Manual — yes, we're folding the manual name into the chat instead of copying the whole header line, because we're cute like that 🫶. this union is literally the Global VF Configuration Register, and it's giving "niche kernel register but make it iconic" 👑.

🦋 SYNOPSIS 🦋

here's the exact struct vibe, no cap — bitfields do not play, so keep every token exactly as shown 💅:

       union nps_core_gbl_vfcfg {
           u64 value;
           struct {
         #if (defined(__BIG_ENDIAN_BITFIELD));
             u64 raz :55;
             u64 ilk_disable :1;
             u64 obaf :1;
             u64 ibaf :1;
             u64 zaf :1;
             u64 aeaf :1;
             u64 seaf :1;
             u64 cfg :3;
         #else;
             u64 cfg :3;
             u64 seaf :1;
             u64 aeaf :1;
             u64 zaf :1;
             u64 ibaf :1;
             u64 obaf :1;
             u64 ilk_disable :1;
             u64 raz :55;
         #endif;
           } s;
        };

lowkey the whole thing is one u64 value plus a struct s, and the field order flips depending on __BIG_ENDIAN_BITFIELD — both branches are main characters, so don't skip either one 🌈. and yeah, the source has semicolons after #if, #else, and #endif exactly like that, periodt 🫶.

👯 Members 👯

the original page has this Members heading and then moves right along — no extra member list beyond the struct fields up in the synopsis, so that's the whole squad right there 💜. the bitfields in the union are the full cast, no missing besties.

🌟 SEE ALSO 🌟

bestie, the kernel file is ./drivers/crypto/cavium/nitrox/nitrox_csr.h, and these are the union besties linked from the page — collect them like stickers 🎀:

• union ucd_core_eid_ucode_block_num(9)
• union aqm_grp_execmsk_lo(9)
• union aqm_grp_execmsk_hi(9)
• union aqmq_drbl(9)
• union aqmq_qsz(9)
• union aqmq_cmp_thr(9)
• union aqmq_cmp_cnt(9)
• union aqmq_en(9)
• union aqmq_activity_stat(9)
• union emu_fuse_map(9)
• union emu_se_enable(9)
• union emu_ae_enable(9)
• union emu_wd_int_ena_w1s(9)
• union emu_ge_int_ena_w1s(9)
• union nps_pkt_slc_ctl(9)
• union nps_pkt_slc_cnts(9)
• union nps_pkt_slc_int_levels(9)
• union nps_pkt_in_done_cnts(9)
• union nps_pkt_in_instr_ctl(9)
• union nps_pkt_in_instr_rsize(9)
• union nps_pkt_in_instr_baoff_dbell(9)
• union nps_core_int_ena_w1s(9)
• union nps_core_int_active(9)
• union efl_core_int(9)
• union efl_core_int_ena_w1s(9)
• union efl_rnm_ctl_status(9)
• union bmi_ctl(9)
• union bmi_int_ena_w1s(9)
• union bmo_ctl2(9)
• union pom_int_ena_w1s(9)
• union lbc_inval_ctl(9)
• union lbc_int_ena_w1s(9)
• union lbc_int(9)
• union lbc_inval_status(9)
• union rst_boot(9)
• union fus_dat1(9)

that's the whole page, bestie 🎀. source/version vibe check: ./drivers/crypto/cavium/nitrox, October 2026, title union nps_core_gbl_vfcfg(9) — now go forth and bitfield responsibly, fr fr 💜✨