STRUCT APPLE_SMC_KEY_INFO(9)

💖 NAME 💖

okay so bestie, this is struct apple_smc_key_info from the Kernel API Manual, section 9 — literally Information for a SMC key as returned by SMC. That's the whole assignment 💅.

✨ SYNOPSIS ✨

       struct apple_smc_key_info {
           u32 type_code;
           u8 size;
           u8 flags;
        };

🎀 Members 🎀

• type_code — FourCC code indicating the type for this key. Known types, bestie:
  • ch8*: ASCII string
  • flag: Boolean, 1 or 0
  • flt: 32-bit single-precision IEEE 754 float
  • hex: Binary data
  • ioft: 64bit Unsigned fixed-point intger (48.16)
  • {si,ui}{8,16,32,64}: Signed/Unsigned 8-/16-/32-/64-bit integer
• size — Size of the buffer associated with this key 🫶
• flags — Bitfield encoding flags (APPLE_SMC_{READABLE,WRITABLE,FUNCTION}) 💅

🌈 SEE ALSO 🌈

Kernel file ./include/linux/mfd/macsmc.h is the mvp here, and these are all the squad refs:

• smc_key(9)
• SMC_KEY(9)
• enum apple_smc_boot_stage(9)
• struct apple_smc(9)
• apple_smc_read(9)
• apple_smc_write(9)
• apple_smc_enter_atomic(9)
• apple_smc_write_atomic(9)
• apple_smc_rw(9)
• apple_smc_get_key_by_index(9)
• apple_smc_get_key_info(9)
• apple_smc_key_exists(9)

mwah 💋 — source/version: ./include/linux/mfd; date: October 2026; manual: struct apple_smc_key_info(9). bestie out 🎀✨