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target/riscv/cpu.c: add riscv_cpu_validate_v() 

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 <dbarboza@ventanamicro.com>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230517135714.211809-2-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Daniel Henrique Barboza 2023-05-17 10:57:04 -03:00 committed by Alistair Francis
parent 6672e29d3b
commit d63be18490
1 changed files with 48 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

89
target/riscv/cpu.c
View File

@ -834,6 +834,46 @@ 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.
@ -841,6 +881,7 @@ 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) &&
@ -909,8 +950,14 @@ 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;
}
@ -1045,46 +1092,6 @@ 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