The RISC-V unprivileged specification "31.3.11. State of Vector Extension at Reset" has a note that recommends vtype.vill be set on reset as part of ensuring that the vector extension have a consistent state at reset.
This change now makes QEMU consistent with Spike which sets vtype.vill on reset. Signed-off-by: Rob Bradford <rbradf...@rivosinc.com> --- target/riscv/cpu.c | 1 + 1 file changed, 1 insertion(+) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 4bda754b01..af602e3caf 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -997,6 +997,7 @@ static void riscv_cpu_reset_hold(Object *obj, ResetType type) cs->exception_index = RISCV_EXCP_NONE; env->load_res = -1; set_default_nan_mode(1, &env->fp_status); + env->vill = true; #ifndef CONFIG_USER_ONLY if (cpu->cfg.debug) { -- 2.46.0