kvm_riscv_vcpu_csr_return(9)

✨ kvm_riscv_vcpu_csr_return ✨

okay so before we even start — this one lives in the Kernel API Manual, and it's literally the riscv KVM girlie whose whole job is cleaning up after CSR reads and writes. bestie, let's get into it 🫶

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🌸 NAME 🌸

kvm_riscv_vcpu_csr_return — handle the CSR read/write situation after user space emulation or in-kernel emulation has already done its thing 💅

like, the emulation happened, and now somebody's gotta handle what comes back. that's her. that's the function. ✨

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🦋 SYNOPSIS 🦋

int kvm_riscv_vcpu_csr_return (struct kvm_vcpu *vcpu , struct kvm_run *run );

yep, she takes two pointers and hands you back an int. iconic signature, no notes. 👑

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🎀 ARGUMENTS 🎀

• vcpu — the VCPU pointer 💖 like, the actual virtual CPU we're talking about here
• run — the VCPU run struct, and this one is carrying the CSR data 🍓 (yes, that CSR data)

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⭐ DESCRIPTION ⭐

okay so the whole personality of this function is the return value, and ngl it's giving plot twist:

• returns > 0 upon failure 😭
• returns 0 upon success ✨

that's it. that's the whole description. she's mysterious, she's brief, she ate and left no crumbs 💀

bestie please read that return convention twice — success is 0 and failure is > 0, fr fr. don't be out here assuming the other way around 🙈

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🌈 SEE ALSO 🌈

• kernel file ./arch/riscv/kvm/vcpu_insn.c
• kvm_riscv_vcpu_wfi(9)
• kvm_riscv_vcpu_virtual_insn(9)
• kvm_riscv_vcpu_mmio_load(9)
• kvm_riscv_vcpu_mmio_store(9)
• kvm_riscv_vcpu_mmio_return(9)

the whole friend group fr — go say hi to all of them 🧚💜

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and that's the page!! mwah 💋 this lil manpage comes to you straight from ./arch/riscv/kvm and it's dated October 2026, filed under kvm_riscv_vcpu_csr_return(9). slay, go read some CSR data, ily bye 🎀🔥