kvm_riscv_vcpu_mmio_store(9)

📦 version 7.3.1, in nixpkgs unstable

💾 kvm_riscv_vcpu_mmio_store(9) 💾

okay so bestie, welcome to the Kernel API Manual ✨ — this little page is all about kvm_riscv_vcpu_mmio_store, and honestly? it's giving "the emulator that could" 💅. sit down, grab a 🍓, and let's get into it.

🌸 NAME 🌸

kvm_riscv_vcpu_mmio_store — Emulate MMIO store instruction 🎀

like, it literally pretends to be an MMIO store for you. main character energy fr fr.

✨ SYNOPSIS ✨

int kvm_riscv_vcpu_mmio_store (struct kvm_vcpu *vcpu , struct kvm_run
*run , gpa_t fault_addr , unsigned long htinst );

four things go in, one int comes out. no cap. 🫶

🦋 ARGUMENTS 🦋

  • vcpu — The VCPU pointer 👑 this is your vcpu bestie, the whole reason we're here
  • run — The VCPU run struct containing the mmio data 📦 it's carrying the mmio tea
  • fault_addr — Guest physical address to store 📍 the exact spot the store wants to land
  • htinst — Transformed encoding of the store instruction 🔥 the instruction, but make it transformed

💜 DESCRIPTION 💜

so here's the vibe check on what it hands back to you:

  • returns > 0 to continue run-loop 🔁 keep it moving, bestie
  • returns 0 to exit run-loop and handle in user-space 🌈 the kernel's stepping out so user-space can take over
  • returns < 0 to report failure and exit run-loop 😭 something went wrong and we're bouncing
⚠️ fr fr pay attention to the sign of that return value — > 0, 0, and < 0 are three totally different moods and you gotta know which one you're in 💀

🧚 SEE ALSO 🧚

Kernel file ./arch/riscv/kvm/vcpu_insn.c — go read it, iykyk 📖

and the whole friend group:

they're all linked, they all slay, go say hi 💖

so that's the whole page, bestie!! brought to you by the lovely humans over at ./arch/riscv/kvm, dated October 2026 — mwah, love that for us 💋✨🎀

📦 where this page comes from