mcpm_cpu_powered_up(9)

💅 mcpm_cpu_powered_up(9) 💅

okay so welcome to the Kernel API Manual side of the group chat, bestie — the (9) is literally right there in the title. this one is all about mcpm_cpu_powered_up, and it is giving “little housekeeping era after a CPU wakes up.” ✨

---

🎀 NAME 🎀

mcpm_cpu_powered_up - housekeeping workafter a CPU has been powered up

and yes, “workafter” is exactly what the page says — we keep the facts, not the grammar vibe 💅

✨ SYNOPSIS ✨

int mcpm_cpu_powered_up (void );

🫶 ARGUMENTS 🫶

• void — no arguments. none. zero. the void is voiding. 💀

🌸 DESCRIPTION 🌸

okay so this function lets the platform specific backend code perform the needed housekeeping work. it’s giving “backend bestie has a little cleanup to do.” 🧚

This must be called by the newly activated CPU as soon as it is fully operational in kernel space, and before it enables interrupts. no skipping steps, no rushing the vibe check, periodt. 👑

bestie, that ordering is not optional — the CPU has to be fully operational in kernel space first, and interrupts stay off until this is handled. 💅

If the operation cannot be performed then an error code is returned. so if it can’t do the thing, it’s not silently ghosting you — you get an error code back. 😭

🦋 SEE ALSO 🦋

• the kernel file ./arch/arm/include/asm/mcpm.h
• mcpm_is_available(9)
• mcpm_cpu_power_up(9)
• mcpm_cpu_power_down(9)
• mcpm_wait_for_cpu_powerdown(9)
• mcpm_cpu_suspend(9)
• mcpm_platform_register(9)
• mcpm_sync_init(9)
• mcpm_loopback(9)

---

and that’s the whole page, bestie 🫶💖 mwah — this one lives under the source/version ./arch/arm/include/asm, dated October 2026, with mcpm_cpu_powered_up(9) as its little footer name. slay. 🌈