Okay, so I'm trying to figure out which category this bug report falls into. The user mentioned that when they run QEMU with the RISC-V64 machine type and issue the poweroff -f command, the system hangs. They tested it on x86_64 and aarch64, where it worked fine, but not on RISCV64. First, I'll think about what each category means. The categories given are: mistranslation, assembly, other, device, graphic, socket, network, KVM, boot, vnc, debug, files, permissions, performance, kernel, peripherals, hypervisor. The issue is that after executing poweroff -f, QEMU doesn't quit and hangs. This seems related to how the machine shuts down. Poweroff usually triggers a shutdown sequence, possibly involving signals or system calls. If it's hanging, maybe something isn't being handled correctly when the guest OS tries to shut down. Looking at the possible categories: - Mistranslation: This would involve incorrect mapping from source to target architecture in user-mode. I don't see any indication of that here; the problem is with poweroff behavior, not with translation. - Assembly lowering (assembly): Doesn't seem related since the issue isn't about generating correct assembly code. - Other: A possible default category if none fit better, but let's check others first. - Device: Maybe, but devices usually refer to hardware emulation. Poweroff is a system call, not directly tied to a device. - Graphic: Unlikely unless it's related to display, which doesn't seem to be the case here. - Socket/network: Not relevant as poweroff isn't about network operations. - KVM: QEMU can use KVM for hardware acceleration. If this is an issue with KVM handling certain instructions or signals on RISC-V64, that could be a possibility. However, since it's specific to RISC-V64 and works elsewhere, perhaps the hypervisor layer has something to do with it. - Boot: Not really about booting up but shutting down. - VNC/debug/files/permissions/performance/kernel/peripherals: These don't seem directly related to the shutdown process causing a hang. So considering that poweroff is a system call and in QEMU, this might involve how signals are handled or how the hypervisor (like KVM) interacts with the guest OS during shutdown. If the RISC-V64 setup isn't properly handling certain exit paths or signals when poweroff is called, it could cause a hang. Therefore, the most fitting category seems to be "hypervisor" because the issue likely relates to how QEMU's hypervisor (like KVM) handles guest OS shutdowns on RISC-V64. The fact that it works on other architectures but not RISC-V64 suggests an architecture-specific handling issue within the hypervisor code. hypervisor