graphic: 0.759 other: 0.744 performance: 0.649 device: 0.634 semantic: 0.632 permissions: 0.288 vnc: 0.284 debug: 0.274 network: 0.181 boot: 0.140 PID: 0.138 socket: 0.116 files: 0.081 KVM: 0.044 RISC-V 64, CPUs do ilegal 0x00 write with SMP When QEMU is runt like this: qemu-system-riscv64 -d unimp,guest_errors -smp 8 Other harts will do a illegal write on address 0x00. This could be mostly (i think) because the initial assembly code is only loaded on the first hart and the others do a mess because there is no code to execute. Even with -smp 1 you will see the same errors. The problem is because there is nothing to run after OpenSBI jumps to the next stage. If you load a kernel you will not see the error messages.