kvm_handle_cp10_id(9)

💅 kvm_handle_cp10_id — a Kernel API Manual moment

ok so bestie, welcome to kvm_handle_cp10_id(9) — the page header says it's from the Kernel API Manual and honestly? it ate. this is the function that handles a VMRS trap when a guest pokes at a 'Media and VFP Register' from AArch32 ✨

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🌸 SYNOPSIS 🌸

like, here's the whole vibe:

int kvm_handle_cp10_id (struct kvm_vcpu *vcpu );

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🎀 ARGUMENTS 🎀

• vcpu — the vCPU pointer 🫶 that's it, that's the whole argument list, she's lowkey minimal

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✨ DESCRIPTION ✨

okay so. MVFR{0-2} are architecturally mapped to the AArch64 MVFR{0-2}_EL1 registers — no cap, that's just the architecture being iconic 💅

what this function does is work out the correct AArch64 system register encoding, and then reroute to the AArch64 system register emulation. so like, it figures out the right encoding and then hands things off to the AArch64 side. main character energy fr fr 🔥

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🦋 SEE ALSO 🦋

• the kernel file ./arch/arm64/kvm/sys_regs.c — go read her, she's the source of truth
• kvm_handle_cp_64(9)
• kvm_emulate_cp15_id_reg(9)
• kvm_handle_cp_32(9)
• emulate_sys_reg(9)
• kvm_reset_sys_regs(9)
• kvm_handle_sys_reg(9)

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ngl bestie, if you're deep in the arm64 sys_regs trenches, the whole squad above is required reading 💀✨

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and that's the page!! mwah 🍓 the footer says ./arch/arm64/kvm and the date is October 2026, so like... future girlies will be reading this and honestly? they're gonna slay with it 👑💖