target/riscv: remove cpu->cfg.ext_e

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

Remove the old "e" property and 'ext_e' 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: <20230406180351.570807-11-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

target/riscv/cpu.c

@@ -831,13 +831,13 @@ static void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
         env->misa_ext_mask = env->misa_ext;
     }
 
-    if (riscv_has_ext(env, RVI) && cpu->cfg.ext_e) {
+    if (riscv_has_ext(env, RVI) && riscv_has_ext(env, RVE)) {
         error_setg(errp,
                    "I and E extensions are incompatible");
         return;
     }
 
-    if (!riscv_has_ext(env, RVI) && !cpu->cfg.ext_e) {
+    if (!riscv_has_ext(env, RVI) && !riscv_has_ext(env, RVE)) {
         error_setg(errp,
                    "Either I or E extension must be set");
         return;
@@ -1150,7 +1150,7 @@ static void riscv_cpu_sync_misa_cfg(CPURISCVState *env)
     if (riscv_has_ext(env, RVI)) {
         ext |= RVI;
     }
-    if (riscv_cpu_cfg(env)->ext_e) {
+    if (riscv_has_ext(env, RVE)) {
         ext |= RVE;
     }
     if (riscv_cpu_cfg(env)->ext_m) {
@@ -1503,6 +1503,8 @@ static const RISCVCPUMisaExtConfig misa_ext_cfgs[] = {
      .misa_bit = RVF, .enabled = true},
     {.name = "i", .description = "Base integer instruction set",
      .misa_bit = RVI, .enabled = true},
+    {.name = "e", .description = "Base integer instruction set (embedded)",
+     .misa_bit = RVE, .enabled = false},
 };
 
 static void riscv_cpu_add_misa_properties(Object *cpu_obj)
@@ -1525,7 +1527,6 @@ static void riscv_cpu_add_misa_properties(Object *cpu_obj)
 
 static Property riscv_cpu_extensions[] = {
     /* Defaults for standard extensions */
-    DEFINE_PROP_BOOL("e", RISCVCPU, cfg.ext_e, false),
     DEFINE_PROP_BOOL("g", RISCVCPU, cfg.ext_g, false),
     DEFINE_PROP_BOOL("m", RISCVCPU, cfg.ext_m, true),
     DEFINE_PROP_BOOL("s", RISCVCPU, cfg.ext_s, true),
@@ -1644,7 +1645,6 @@ static void register_cpu_props(Object *obj)
      * later on.
      */
     if (cpu->env.misa_ext != 0) {
-        cpu->cfg.ext_e = misa_ext & RVE;
         cpu->cfg.ext_m = misa_ext & RVM;
         cpu->cfg.ext_v = misa_ext & RVV;
         cpu->cfg.ext_s = misa_ext & RVS;

target/riscv/cpu.h

@@ -422,7 +422,6 @@ typedef struct {
 } RISCVSATPMap;
 
 struct RISCVCPUConfig {
-    bool ext_e;
     bool ext_g;
     bool ext_m;
     bool ext_s;

target/riscv/insn_trans/trans_rvzce.c.inc

@@ -117,7 +117,7 @@ static uint32_t decode_push_pop_list(DisasContext *ctx, target_ulong rlist)
 {
     uint32_t reg_bitmap = 0;
 
-    if (ctx->cfg_ptr->ext_e && rlist > 6) {
+    if (has_ext(ctx, RVE) && rlist > 6) {
         return 0;
     }