On Tue, Apr 18, 2023 at 12:02 AM Daniel Henrique Barboza
<dbarb...@ventanamicro.com> wrote:
>
> The RVV verification will error out if fails and it's being done at the
> end of riscv_cpu_validate_set_extensions(), after we've already set some
> extensions that are dependent on RVV. Let's put it in its own function
> and do it earlier.
>
> Signed-off-by: Daniel Henrique Barboza <dbarb...@ventanamicro.com>
> Reviewed-by: LIU Zhiwei <zhiwei_...@linux.alibaba.com>
> Reviewed-by: Weiwei Li <liwei...@iscas.ac.cn>
Acked-by: Alistair Francis <alistair.fran...@wdc.com>
Alistair
> ---
> target/riscv/cpu.c | 89 +++++++++++++++++++++++++---------------------
> 1 file changed, 48 insertions(+), 41 deletions(-)
>
> diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
> index befa64528f..feca13aefb 100644
> --- a/target/riscv/cpu.c
> +++ b/target/riscv/cpu.c
> @@ -797,6 +797,46 @@ static void riscv_cpu_disas_set_info(CPUState *s,
> disassemble_info *info)
> }
> }
>
> +static void riscv_cpu_validate_v(CPURISCVState *env, RISCVCPUConfig *cfg,
> + Error **errp)
> +{
> + int vext_version = VEXT_VERSION_1_00_0;
> +
> + if (!is_power_of_2(cfg->vlen)) {
> + error_setg(errp, "Vector extension VLEN must be power of 2");
> + return;
> + }
> + if (cfg->vlen > RV_VLEN_MAX || cfg->vlen < 128) {
> + error_setg(errp,
> + "Vector extension implementation only supports VLEN "
> + "in the range [128, %d]", RV_VLEN_MAX);
> + return;
> + }
> + if (!is_power_of_2(cfg->elen)) {
> + error_setg(errp, "Vector extension ELEN must be power of 2");
> + return;
> + }
> + if (cfg->elen > 64 || cfg->elen < 8) {
> + error_setg(errp,
> + "Vector extension implementation only supports ELEN "
> + "in the range [8, 64]");
> + return;
> + }
> + if (cfg->vext_spec) {
> + if (!g_strcmp0(cfg->vext_spec, "v1.0")) {
> + vext_version = VEXT_VERSION_1_00_0;
> + } else {
> + error_setg(errp, "Unsupported vector spec version '%s'",
> + cfg->vext_spec);
> + return;
> + }
> + } else {
> + qemu_log("vector version is not specified, "
> + "use the default value v1.0\n");
> + }
> + set_vext_version(env, vext_version);
> +}
> +
> /*
> * Check consistency between chosen extensions while setting
> * cpu->cfg accordingly.
> @@ -804,6 +844,7 @@ static void riscv_cpu_disas_set_info(CPUState *s,
> disassemble_info *info)
> static void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
> {
> CPURISCVState *env = &cpu->env;
> + Error *local_err = NULL;
>
> /* Do some ISA extension error checking */
> if (riscv_has_ext(env, RVG) &&
> @@ -872,8 +913,14 @@ static void riscv_cpu_validate_set_extensions(RISCVCPU
> *cpu, Error **errp)
> return;
> }
>
> - /* The V vector extension depends on the Zve64d extension */
> if (riscv_has_ext(env, RVV)) {
> + riscv_cpu_validate_v(env, &cpu->cfg, &local_err);
> + if (local_err != NULL) {
> + error_propagate(errp, local_err);
> + return;
> + }
> +
> + /* The V vector extension depends on the Zve64d extension */
> cpu->cfg.ext_zve64d = true;
> }
>
> @@ -1008,46 +1055,6 @@ static void riscv_cpu_validate_set_extensions(RISCVCPU
> *cpu, Error **errp)
> cpu->cfg.ext_zksed = true;
> cpu->cfg.ext_zksh = true;
> }
> -
> - if (riscv_has_ext(env, RVV)) {
> - int vext_version = VEXT_VERSION_1_00_0;
> - if (!is_power_of_2(cpu->cfg.vlen)) {
> - error_setg(errp,
> - "Vector extension VLEN must be power of 2");
> - return;
> - }
> - if (cpu->cfg.vlen > RV_VLEN_MAX || cpu->cfg.vlen < 128) {
> - error_setg(errp,
> - "Vector extension implementation only supports VLEN "
> - "in the range [128, %d]", RV_VLEN_MAX);
> - return;
> - }
> - if (!is_power_of_2(cpu->cfg.elen)) {
> - error_setg(errp,
> - "Vector extension ELEN must be power of 2");
> - return;
> - }
> - if (cpu->cfg.elen > 64 || cpu->cfg.elen < 8) {
> - error_setg(errp,
> - "Vector extension implementation only supports ELEN "
> - "in the range [8, 64]");
> - return;
> - }
> - if (cpu->cfg.vext_spec) {
> - if (!g_strcmp0(cpu->cfg.vext_spec, "v1.0")) {
> - vext_version = VEXT_VERSION_1_00_0;
> - } else {
> - error_setg(errp,
> - "Unsupported vector spec version '%s'",
> - cpu->cfg.vext_spec);
> - return;
> - }
> - } else {
> - qemu_log("vector version is not specified, "
> - "use the default value v1.0\n");
> - }
> - set_vext_version(env, vext_version);
> - }
> }
>
> #ifndef CONFIG_USER_ONLY
> --
> 2.39.2
>
>
