_kvm_vz_restore_htimer(9)

📦 version 7.3.1, in nixpkgs unstable

💅 _kvm_vz_restore_htimer — a whole vibe

okay so this little icon is from the Kernel API Manual, and it's genuinely one of those tiny-but-does-so-much functions, so let's get into it bestie 🫶

✨ NAME ✨

_kvm_vz_restore_htimer — restores the hard timer state. that's it. that's the whole job. and it does it flawlessly. 👑

🌸 SYNOPSIS 🌸

void _kvm_vz_restore_htimer (struct kvm_vcpu *vcpu , u32 compare , u32 cause );

no return value, it just goes in there and puts things back. void behaviour, main character energy 💅

🎀 ARGUMENTS 🎀

  • vcpu — the virtual CPU. literally the star of the show, the guest we're doing all this for 💖
  • compare — the CP0_Compare register value. and lowkey important: the caller is the one who restores this one, not us. we're just hanging out with it ✨
  • cause — the CP0_Cause register, and it's our job to restore it. no pressure or anything 🙈

🦋 DESCRIPTION 🦋

so the whole point of this function is to restore the hard timer — and that means bringing back both Guest.Count and Guest.Cause 💫

but here's the part where you gotta pay attention, bestie, because this is the whole personality of the function: while it's restoring Guest.CP0_Cause, it takes care to preserve the value of Guest.CP0_Cause.TI. like, that bit stays exactly how it was. we don't touch it. we protect it. it's giving bodyguard energy fr fr 🛡️

so: Guest.Count restored ✅ Guest.Cause restored ✅ Guest.CP0_Cause.TI preserved like the absolute treasure it is ✅ no cap, that's the whole function 😭

⭐ SEE ALSO ⭐

the kernel file this lives in is ./arch/mips/kvm/vz.c, and it has so many friends — go say hi to the whole squad:

like, that's a whole friend group and honestly? we love a supportive cast 🌈

ngl the entire page is one tiny function doing one tiny careful thing, and that's iconic behaviour. periodt. 💜

and that's a wrap bestie!! this page came straight out of ./arch/mips/kvm, dated October 2026, and it's tagged right there in the footer under the header _kvm_vz_restore_htimer(9) — so if you ever forget where it's from, now you know 🍓🧚 mwah, go restore some timers 💖🎀

📦 where this page comes from