intel_idle_cpu_init(9)

okay so bestie, this is intel_idle_cpu_init(9) from the Kernel API Manual, and it’s giving “register that CPU with the cpuidle core” realness ✨💅

🌸 NAME 🌸

intel_idle_cpu_init — register the target CPU with the cpuidle core.

✨ SYNOPSIS ✨

int intel_idle_cpu_init (unsigned int cpu );

🎀 ARGUMENTS 🎀

• cpu — the CPU to initialize. That’s the one, bestie 👑.

💖 DESCRIPTION 💖

So this function registers a cpuidle device object for cpu, and it updates its MSRs in accordance with the processor model flags. That’s the whole vibe check — no cap 🫶🔥

🦋 SEE ALSO 🦋

The kernel file ./drivers/idle/intel_idle.c, plus the whole reference squad:

• intel_idle(9)
• intel_idle_s2idle(9)
• intel_idle_cst_usable(9)
• ivt_idle_state_table_update(9)
• irtl_2_usec(9)
• bxt_idle_state_table_update(9)
• sklh_idle_state_table_update(9)
• skx_is_pc6_disabled(9)
• skx_idle_state_table_update(9)
• spr_idle_state_table_update(9)
• drop_pc6_redundant_cstates(9)
• byt_cht_auto_demotion_disable(9)
• intel_idle_cpuidle_driver_init(9)
• intel_idle_cpuidle_devices_uninit(9)
• validate_cmdline_cstate(9)
• cmdline_table_adjust(9)

this page lives under ./drivers/idle, is dated October 2026, and literally answers to intel_idle_cpu_init(9) — bye bestie, go register that CPU 💖🌈