mcpm_cpu_suspend(9)

💤 mcpm_cpu_suspend(9) — bring the calling CPU in a suspended state 💤

okay so bestie, this one lives in the Kernel API Manual (section 9, kernel-level, you already know 🫶). Let's get into it before your CPU literally falls asleep on you.

---

✨ SYNOPSIS ✨

void mcpm_cpu_suspend (void );

that's it. that's the whole call. she takes nothing and gives nothing back 😌

---

🎀 ARGUMENTS 🎀

• void — no arguments. literally none. zero. empty set. she's not asking for anything from you 💅

---

🦋 DESCRIPTION 🦋

So the calling CPU gets suspended. straight up napping. and ngl, this is similar to mcpm_cpu_power_down — like, same energy — except there might be extra platform-specific configuration steps in there to allow an asynchronous wake-up, e.g. with a pending interrupt. so she's not fully down for the count, she's just, like, dozing with one eye open 😭

If this CPU turns out to be the "last man standing" in the cluster 👑 then the cluster itself may get prepped for power-down too. main character energy forreal.

⚠️ okay this part is important, do NOT skip it: this must be called with interrupts disabled. no cap. if you didn't disable them, that's a you problem and it's giving 💀

On success, this does not return. like, at all. she's gone 🌙 re-entry into the kernel is expected via mcpm_entry_point.

But — and this is the plot twist — it will return if mcpm_platform_register has not been called previously, in which case the caller should take appropriate action. so like, if you skipped the registration era of your life, expect a comeback 🙈

---

🧚 SEE ALSO 🧚

Kernel file ./arch/arm/include/asm/mcpm.h — go read the source bestie, it's iconic ⭐

• mcpm_is_available(9)
• mcpm_cpu_power_up(9)
• mcpm_cpu_power_down(9)
• mcpm_wait_for_cpu_powerdown(9)
• mcpm_cpu_powered_up(9)
• mcpm_platform_register(9)
• mcpm_sync_init(9)
• mcpm_loopback(9)

---

kisses bestie, this page came from ./arch/arm/include/asm and she's stamped October 2026 🌸 go put that CPU to sleep (after disabling interrupts, obviously) 💖✨