mips_cm_lock_other_cpu(9)

📦 version 7.3.1, in nixpkgs unstable

💅 mips_cm_lock_other_cpu(9) — from the Kernel API Manual, bestie ✨

Okay so picture this: you're deep in MIPS land, you gotta poke at another CPU's registers, and the kernel docs just handed you... this. Don't worry, I got you 🫶 This is mips_cm_lock_other_cpu, and it's lowkey iconic once you get what it's doing.

🎀 NAME 🎀

mips_cm_lock_other_cpu — lock access to redirect/other region

Like, that's the whole vibe. You're locking down access to the redirect/other region. Periodt. 💅

✨ SYNOPSIS ✨

void mips_cm_lock_other_cpu (unsigned int cpu , unsigned int block );

Two unsigned ints in, nothing out. Void return, she doesn't owe you a result, she just does the thing 🔥

🌸 ARGUMENTS 🌸

  • cpu — the other CPU whose register we want to access. That's it, that's the whole note. You point at a CPU, you get at its registers 🎯
  • block — -- undescribed -- 😭
Not me having to tell you that the docs literally say -- undescribed -- for block. That's not me being lazy, that's genuinely what the page says. The manpage said "no thoughts, head empty" on that one and honestly? Respect for the honesty 🙈

🦋 DESCRIPTION 🦋

So what does she do? She configures the redirect/other region for the local core/VP — and yes, which one it is depends on the CM revision, so vibe check your revision first, bestie — and she points it at the specified cpu and the register block. Target acquired, main character energy 🎀

The way that this is basically the same thing as calling mips_cm_lock_other, except it's the friendly version — it accepts a Linux CPU number for convenience 💖 So instead of you out here doing the conversion gymnastics yourself, she takes the nice Linux CPU number and handles it. Convenience queen. We love her for it 👑

💜 SEE ALSO 💜

Everything in the kernel file ./arch/mips/include/asm/mips-cm.h, plus this whole squad right here — go say hi, they all run in the same friend group:

Okay that's the whole page, no cap 🌈 Go lock that region, bestie — you're literally doing great.

💀 Sign-off realness: this little beauty lives in ./arch/mips/include/asm and the page is dated October 2026. Slay. 🍓
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