STRUCT HBM_POWER_GATE(9)

💖 struct hbm_power_gate(9) — the Kernel API Manual era 💖

okay so bestie, welcome to the struct hbm_power_gate(9) page — this is the kernel API manual, and today's main character is... a power gate request/response. tiny struct, huge vibe. let's get into it 🫶

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✨ NAME ✨

struct hbm_power_gate — literally just the power gate request/response, that's the whole thing, no notes 💅

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🌸 SYNOPSIS 🌸

here's the shape of it, bestie — copy it exactly, don't freestyle:

struct hbm_power_gate {
    u8 hbm_cmd;
    u8 reserved[3];
 };

yes there's a little extra space before that closing brace in the original and we are respecting it, periodt 🎀

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🦋 Members 🦋

• hbm_cmd — the bus message command header. that's her job, that's what she does ✨
• reserved — reserved. she's just sitting there being reserved, iconic behaviour honestly 💀

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🌈 SEE ALSO 🌈

okay this is the part where the whole friend group shows up, so let's do introductions. first, the kernel file itself: ./drivers/misc/mei/hw.h — that's home base, go look there 👑

and then, in the exact order they're listed:

• 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_client_connect_request(9)
• struct hbm_client_connect_response(9)
• struct hbm_notification_request(9)
• struct hbm_notification_response(9)
• struct hbm_notification(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)

that's the whole squad, no cap. go read them all, iykyk 📚🔥

lowkey a reminder bestie: those are the references exactly as the page gives them — don't go renaming anything or inventing extra ones, fr fr 🙈

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and that's the page!! 🎀 a whole struct, two members, one absolutely enormous SEE ALSO list. she ate and left no crumbs 👑

sign-off time, cutely: this one lives in ./drivers/misc/mei and it's dated October 2026 — so yeah, future-coded of her 💜🌙 bye bestie, go read some HBM structs 💖