kvm_mips_set_count_ctl(9)

📦 version 7.3.1, in nixpkgs unstable

💖 kvm_mips_set_count_ctl — Kernel API Manual ✨

okay so bestie, we're in the MIPS KVM corner of the kernel today, and this little function is the one that pokes the count control register. it's giving "small but important" energy fr fr. the manual name for this one is literally kvm_mips_set_count_ctl, section 9 (kernel API), so you already know this is dev docs, not your average man ls. 🎀

🌸 NAME 🌸

kvm_mips_set_count_ctl — update the count control KVM register, no cap.

✨ SYNOPSIS ✨

int kvm_mips_set_count_ctl (struct kvm_vcpu *vcpu , s64 count_ctl );

literally the whole signature, character for character, because we do not play about code. 💅

🦋 ARGUMENTS 🦋

  • vcpu — the virtual CPU. your main character, basically. 👑
  • count_ctl — the new value for the count control register. that's the vibe you're setting it to. ⭐

💜 DESCRIPTION 💜

so what does it actually do? it sets the count control KVM register. and because the timer is lowkey linked to that register, the timer gets updated accordingly too. so yeah, the register is the star, but the timer is coming along for the ride. 🧚

🍓 RETURN 🍓

  • -EINVAL — returned if reserved bits are set. like, do not touch those bits, bestie, they're reserved for a reason. 🙈
  • 0 — on success. slay. 🔥

🌈 SEE ALSO 🌈

these are all in the kernel file ./arch/mips/kvm/emulate.c, and honestly the whole friend group is here:

also peep the path ./arch/mips/kvm — that's where this whole situation lives. iykyk. 🫶

and that's the page, bestie! 💖 this one comes from the ./arch/mips/kvm corner of the source tree, dated October 2026, in the Kernel API Manual (9). go forth and set that count control register with confidence. periodt. 🌟

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