[PATCH 07/16] target/riscv: rework 'vext_spec'

[Daniel Henrique Barboza]

The same rework did in 'priv_spec' is done for 'vext_spec'. This time is
simpler, since we only accept one value ("v1.0") and we'll always have
env->vext_ver set to VEXT_VERSION_1_00_0, thus we don't need helpers to
convert string to 'vext_ver' back and forth like we needed for
'priv_spec'.

Signed-off-by: Daniel Henrique Barboza <dbarb...@ventanamicro.com>
---
 target/riscv/cpu.c         | 42 ++++++++++++++++++++++++++++++++++----
 target/riscv/cpu.h         |  1 +
 target/riscv/cpu_cfg.h     |  1 -
 target/riscv/tcg/tcg-cpu.c | 15 --------------
 4 files changed, 39 insertions(+), 20 deletions(-)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 4e1813eca7..05ca458177 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -1237,6 +1237,8 @@ static void riscv_cpu_post_init(Object *obj)
 
 static void riscv_cpu_init(Object *obj)
 {
+    RISCVCPU *cpu = RISCV_CPU(obj);
+
 #ifndef CONFIG_USER_ONLY
     qdev_init_gpio_in(DEVICE(obj), riscv_cpu_set_irq,
                       IRQ_LOCAL_MAX + IRQ_LOCAL_GUEST_MAX);
@@ -1249,8 +1251,11 @@ static void riscv_cpu_init(Object *obj)
      * for all CPUs. Each accelerator will decide what to do when
      * users disable them.
      */
-    RISCV_CPU(obj)->cfg.ext_zicntr = true;
-    RISCV_CPU(obj)->cfg.ext_zihpm = true;
+    cpu->cfg.ext_zicntr = true;
+    cpu->cfg.ext_zihpm = true;
+
+    /* vext_spec is always 1_00_0 */
+    cpu->env.vext_ver = VEXT_VERSION_1_00_0;
 }
 
 typedef struct misa_ext_info {
@@ -1629,9 +1634,37 @@ const PropertyInfo prop_priv_spec = {
     .set = prop_priv_spec_set,
 };
 
-Property riscv_cpu_options[] = {
-    DEFINE_PROP_STRING("vext_spec", RISCVCPU, cfg.vext_spec),
+static void prop_vext_spec_set(Object *obj, Visitor *v, const char *name,
+                               void *opaque, Error **errp)
+{
+    RISCVCPU *cpu = RISCV_CPU(obj);
+    g_autofree char *value = NULL;
+
+    visit_type_str(v, name, &value, errp);
+
+    if (!g_strcmp0(value, VEXT_VER_1_00_0_STR)) {
+        error_setg(errp, "Unsupported vector spec version '%s'", value);
+        return;
+    }
+
+    cpu->env.vext_ver = VEXT_VERSION_1_00_0;
+}
+
+static void prop_vext_spec_get(Object *obj, Visitor *v, const char *name,
+                               void *opaque, Error **errp)
+{
+    const char *value = VEXT_VER_1_00_0_STR;
 
+    visit_type_str(v, name, (char **)&value, errp);
+}
+
+const PropertyInfo prop_vext_spec = {
+    .name = "vext_spec",
+    .get = prop_vext_spec_get,
+    .set = prop_vext_spec_set,
+};
+
+Property riscv_cpu_options[] = {
     DEFINE_PROP_UINT16("vlen", RISCVCPU, cfg.vlen, 128),
     DEFINE_PROP_UINT16("elen", RISCVCPU, cfg.elen, 64),
 
@@ -1652,6 +1685,7 @@ static Property riscv_cpu_properties[] = {
     {.name = "pmp", .info = &prop_pmp},
 
     {.name = "priv_spec", .info = &prop_priv_spec},
+    {.name = "vext_spec", .info = &prop_vext_spec},
 
 #ifndef CONFIG_USER_ONLY
     DEFINE_PROP_UINT64("resetvec", RISCVCPU, env.resetvec, DEFAULT_RSTVEC),
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index e8a691ca63..53101b82c5 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -89,6 +89,7 @@ enum {
 };
 
 #define VEXT_VERSION_1_00_0 0x00010000
+#define VEXT_VER_1_00_0_STR "v1.0"
 
 enum {
     TRANSLATE_SUCCESS,
diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h
index 2dba1f0007..7112af6c4c 100644
--- a/target/riscv/cpu_cfg.h
+++ b/target/riscv/cpu_cfg.h
@@ -135,7 +135,6 @@ struct RISCVCPUConfig {
     bool ext_XVentanaCondOps;
 
     uint32_t pmu_mask;
-    char *vext_spec;
     uint16_t vlen;
     uint16_t elen;
     uint16_t cbom_blocksize;
diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
index 4d67b72d9e..6501c29d8e 100644
--- a/target/riscv/tcg/tcg-cpu.c
+++ b/target/riscv/tcg/tcg-cpu.c
@@ -201,21 +201,6 @@ static void riscv_cpu_validate_v(CPURISCVState *env, 
RISCVCPUConfig *cfg,
                    "in the range [8, 64]");
         return;
     }
-
-    if (cfg->vext_spec) {
-        if (!g_strcmp0(cfg->vext_spec, "v1.0")) {
-            env->vext_ver = VEXT_VERSION_1_00_0;
-        } else {
-            error_setg(errp, "Unsupported vector spec version '%s'",
-                       cfg->vext_spec);
-            return;
-        }
-    } else if (env->vext_ver == 0) {
-        qemu_log("vector version is not specified, "
-                 "use the default value v1.0\n");
-
-        env->vext_ver = VEXT_VERSION_1_00_0;
-    }
 }
 
 static void riscv_cpu_disable_priv_spec_isa_exts(RISCVCPU *cpu)
-- 
2.43.0