write_ciabr(9)

💖 NAME 💖

okay so bestie, this is write_ciabr(9) from the Kernel API Manual — and it literally writes the CIABR SPR. That's the assignment. iconic. 🦋

✨ SYNOPSIS ✨

void write_ciabr (unsigned long ciabr );

🎀 ARGUMENTS 🎀

• ciabr — the value to write. that's it, that's the whole argument, no cap. 💅

🌸 DESCRIPTION 🌸

So here's the tea: this function writes a value to the CIARB register either directly through the mtspr instruction if the kernel is in HV privilege mode, or it calls a hypervisor function to achieve the same in case the kernel is in supervisor privilege mode. slay. ✨

👑 SEE ALSO 👑

• Kernel file ./arch/powerpc/xmon/xmon.c
• set_ciabr(9) — go peek, iykyk 👀

mwah 💋 — source/version ./arch/powerpc/xmon, dated October 2026, and the page is write_ciabr(9). that's the wrap, bestie 🫶💖