target/riscv: remove cpu->cfg.ext_v

Create a new "v" RISCVCPUMisaExtConfig property that will update
env->misa_ext* with RVV. Instances of cpu->cfg.ext_v and similar are
replaced with riscv_has_ext(env, RVV).

Remove the old "v" property and 'ext_v' from RISCVCPUConfig.

Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230406180351.570807-17-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

target/riscv/cpu.c

@@ -883,7 +883,7 @@ static void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
     }
 
     /* The V vector extension depends on the Zve64d extension */
-    if (cpu->cfg.ext_v) {
+    if (riscv_has_ext(env, RVV)) {
         cpu->cfg.ext_zve64d = true;
     }
 
@@ -1018,7 +1018,7 @@ static void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
         cpu->cfg.ext_zksh = true;
     }
 
-    if (cpu->cfg.ext_v) {
+    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,
@@ -1175,7 +1175,7 @@ static void riscv_cpu_sync_misa_cfg(CPURISCVState *env)
     if (riscv_has_ext(env, RVH)) {
         ext |= RVH;
     }
-    if (riscv_cpu_cfg(env)->ext_v) {
+    if (riscv_has_ext(env, RVV)) {
         ext |= RVV;
     }
     if (riscv_has_ext(env, RVJ)) {
@@ -1513,6 +1513,8 @@ static const RISCVCPUMisaExtConfig misa_ext_cfgs[] = {
      .misa_bit = RVH, .enabled = true},
     {.name = "x-j", .description = "Dynamic translated languages",
      .misa_bit = RVJ, .enabled = false},
+    {.name = "v", .description = "Vector operations",
+     .misa_bit = RVV, .enabled = false},
 };
 
 static void riscv_cpu_add_misa_properties(Object *cpu_obj)
@@ -1536,7 +1538,6 @@ static void riscv_cpu_add_misa_properties(Object *cpu_obj)
 static Property riscv_cpu_extensions[] = {
     /* Defaults for standard extensions */
     DEFINE_PROP_BOOL("g", RISCVCPU, cfg.ext_g, false),
-    DEFINE_PROP_BOOL("v", RISCVCPU, cfg.ext_v, false),
     DEFINE_PROP_UINT8("pmu-num", RISCVCPU, cfg.pmu_num, 16),
     DEFINE_PROP_BOOL("sscofpmf", RISCVCPU, cfg.ext_sscofpmf, false),
     DEFINE_PROP_BOOL("Zifencei", RISCVCPU, cfg.ext_ifencei, true),
@@ -1638,7 +1639,6 @@ static Property riscv_cpu_extensions[] = {
 static void register_cpu_props(Object *obj)
 {
     RISCVCPU *cpu = RISCV_CPU(obj);
-    uint32_t misa_ext = cpu->env.misa_ext;
     Property *prop;
     DeviceState *dev = DEVICE(obj);
 
@@ -1648,8 +1648,6 @@ static void register_cpu_props(Object *obj)
      * later on.
      */
     if (cpu->env.misa_ext != 0) {
-        cpu->cfg.ext_v = misa_ext & RVV;
-
         /*
          * We don't want to set the default riscv_cpu_extensions
          * in this case.

target/riscv/cpu.h

@@ -423,7 +423,6 @@ typedef struct {
 
 struct RISCVCPUConfig {
     bool ext_g;
-    bool ext_v;
     bool ext_zba;
     bool ext_zbb;
     bool ext_zbc;