device: 0.833 graphic: 0.829 network: 0.711 instruction: 0.685 socket: 0.591 vnc: 0.580 mistranslation: 0.547 semantic: 0.531 boot: 0.328 KVM: 0.166 other: 0.145 assembly: 0.093 HTIF symbols no longer recognized by RISC-V spike board Tested commit: f34edbc760b0f689deddd175fc08732ecb46665f I belive this was introduced in 0ac24d56c5e7d32423ea78ac58a06b444d1df04d when the spike's load_kernel() was moved to riscv_load_kernel() which no longer included htif_symbol_callback(). I think you are right. Would you like to write a patch to fix the issue? No, patch sign-off requires a legal name. Ok, I'll add it to my to do list then Patch has been included in QEMU v4.2: https://git.qemu.org/?p=qemu.git;a=commitdiff;h=6478dd745dca49d632