STRUCT HBM_NOTIFICATION(9)

🎀 struct hbm_notification(9) 🎀

okay bestie, so this one's from the Kernel API Manual — literally the struct hbm_notification(9) page, and it's giving "small but iconic." it's a notification event struct, and honestly? she's compact, she's aligned, she's doing exactly what she needs to do. 💅

✨ NAME ✨

struct hbm_notification — notification event 🦋

✨ SYNOPSIS ✨

struct hbm_notification {
    u8 hbm_cmd;
    u8 me_addr;
    u8 host_addr;
    u8 reserved;
};

💖 Members 💖

• hbm_cmd — the bus message command header, aka the vibe check at the front of the struct 👑
• me_addr — address of the client in ME ✨
• host_addr — address of the client in the driver 🫶
• reserved — reserved for alignment, she's just there to keep things lined up, no cap 💀

🌈 SEE ALSO 🌈

no because the friend group is HUGE, bestie. literally the whole guest list, all from kernel file ./drivers/misc/mei/hw.h:

• enum mei_hbm_status(9)
• enum mei_ext_hdr_type(9)
• struct mei_ext_hdr(9)
• struct mei_ext_meta_hdr(9)
• struct mei_ext_hdr_vtag(9)
• mei_ext_begin(9)
• mei_ext_last(9)
• struct mei_ext_hdr_gsc_h2f(9)
• struct mei_ext_hdr_gsc_f2h(9)
• mei_ext_next(9)
• mei_ext_hdr_len(9)
• struct mei_msg_hdr(9)
• struct mei_hbm_cl_cmd(9)
• enum hbm_host_enum_flags(9)
• struct hbm_host_enum_request(9)
• struct mei_client_properties(9)
• struct hbm_add_client_request(9)
• struct hbm_add_client_response(9)
• struct hbm_power_gate(9)
• struct hbm_client_connect_request(9)
• struct hbm_client_connect_response(9)
• struct hbm_notification_request(9)
• struct hbm_notification_response(9)
• struct hbm_dma_mem_dscr(9)
• struct hbm_dma_setup_request(9)
• struct hbm_dma_setup_response(9)
• struct hbm_dma_ring_ctrl(9)
• struct hbm_capability_request(9)
• struct hbm_capability_response(9)
• struct hbm_client_dma_map_request(9)
• struct hbm_client_dma_unmap_request(9)
• struct hbm_client_dma_response(9)

fr fr go read the whole ./drivers/misc/mei/hw.h file if you want the full lore, iykyk 📖💜

and that's the page, bestie! short, sweet, four fields, zero drama. 💖 this cutie came out of ./drivers/misc/mei and the version date on the original was October 2026 — so yeah, from the future, slay. 🌸✨🎀