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target/riscv: rvv: Fix incorrect vlen comparison in prop_vlen_set

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In prop_vlen_set function, there is an incorrect comparison between
vlen(bit) and vlenb(byte).
This will cause unexpected error when user applies the `vlen=1024` cpu
option with a vendor predefined cpu type that the default vlen is
1024(vlenb=128).

Fixes: 4f6d036ccc ("target/riscv/cpu.c: remove cpu->cfg.vlen")
Signed-off-by: Max Chou <max.chou@sifive.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Message-ID: <20250124090539.2506448-1-max.chou@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Max Chou 2025-01-24 17:05:38 +08:00 • committed by Alistair Francis
parent ffd455963f
commit bf3adf93f1
1 changed files with 3 additions and 2 deletions
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5
target/riscv/cpu.c
View file

@ -2027,6 +2027,7 @@ static void prop_vlen_set(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
RISCVCPU *cpu = RISCV_CPU(obj);
uint16_t cpu_vlen = cpu->cfg.vlenb << 3;
uint16_t value;
if (!visit_type_uint16(v, name, &value, errp)) {
@ -2038,10 +2039,10 @@ static void prop_vlen_set(Object *obj, Visitor *v, const char *name,
return;
}
if (value != cpu->cfg.vlenb && riscv_cpu_is_vendor(obj)) {
if (value != cpu_vlen && riscv_cpu_is_vendor(obj)) {
cpu_set_prop_err(cpu, name, errp);
error_append_hint(errp, "Current '%s' val: %u\n",
name, cpu->cfg.vlenb << 3);
name, cpu_vlen);
return;
}