kvm_vz_resize_guest_vtlb(9)

📦 version 7.3.1, in nixpkgs unstable

💅 kvm_vz_resize_guest_vtlb(9) 💅

okay so bestie, we're in the Kernel API Manual today and the star of the show is kvm_vz_resize_guest_vtlb — literally the function that tries to resize your guest VTLB. yes, "attempt" is doing a lot of work there, we'll get to it. 🫶

✨ NAME ✨

kvm_vz_resize_guest_vtlb — attempt to resize guest VTLB. that's it, that's the whole vibe. it attempts. iconic behavior honestly. 💅

🦋 SYNOPSIS 🦋

unsigned int kvm_vz_resize_guest_vtlb (unsigned int size );

so you hand it a size, you get back an unsigned int, and the whole thing is one line of C. no cap, that's the entire signature. 🎀

🌸 ARGUMENTS 🌸

  • size — the number of guest VTLB entries you want. and there's a vibe check built in: it has to satisfy 0 < size <= root VTLB entries. so like, bigger than zero, but not bigger than the root VTLB has. periodt. ✨

💖 DESCRIPTION 💖

okay so here's what's actually happening. this function attempts to resize the guest VTLB by writing guest Config registers. like, it's out here poking the Config registers to make the guest VTLB a different size. 🎀

and why do we even need this? because on cores with a shared root/guest TLB, you gotta avoid overlap with the wired entries in the root VTLB. literally avoiding a collision, bestie. no overlap, no drama. 💀

👑 RETURN 👑

what comes back? the resulting guest VTLB size. that's the return value, that's it. the size you actually ended up with. 🌈

🧚 SEE ALSO 🧚

like, go read these next, iykyk:

and that's the page, bestie!! 🦋 mwah 💋 this one lives in ./arch/mips/kvm, it's dated October 2026, and it's giving main character energy from the Kernel API Manual. go resize some VTLBs, slay, and remember: no overlap. periodt. 💅✨

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