[PATCH 07/20] target/riscv/cpu.c: add .instance_post_init()

[Daniel Henrique Barboza]

All generic CPUs call riscv_cpu_add_user_properties(). The 'max' CPU
calls riscv_init_max_cpu_extensions(). Both can be moved to a common
instance_post_init() callback, implemented in riscv_cpu_post_init(),
called by all CPUs. The call order then becomes:

riscv_cpu_init() -> cpu_init() of each CPU -> .instance_post_init()

A CPU class that wants to add user flags will let us know via the
'user_extension_properties' property. Likewise, 'cfg.max_features' will
determine if any given CPU, regardless of being the 'max' CPU or not,
wants to enable the maximum amount of extensions.

In the near future riscv_cpu_post_init() will call the init() function
of the current accelerator, providing a hook for KVM and TCG accel
classes to change the init() process of the CPU.

Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
---
 target/riscv/cpu.c | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index c35d58c64b..f67b782675 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -430,8 +430,6 @@ static void riscv_max_cpu_init(Object *obj)
     mlx = MXL_RV32;
 #endif
     set_misa(env, mlx, 0);
-    riscv_cpu_add_user_properties(obj);
-    riscv_init_max_cpu_extensions(obj);
     env->priv_ver = PRIV_VERSION_LATEST;
 #ifndef CONFIG_USER_ONLY
     set_satp_mode_max_supported(RISCV_CPU(obj), mlx == MXL_RV32 ?
@@ -445,7 +443,6 @@ static void rv64_base_cpu_init(Object *obj)
     CPURISCVState *env = &RISCV_CPU(obj)->env;
     /* We set this in the realise function */
     set_misa(env, MXL_RV64, 0);
-    riscv_cpu_add_user_properties(obj);
     /* Set latest version of privileged specification */
     env->priv_ver = PRIV_VERSION_LATEST;
 #ifndef CONFIG_USER_ONLY
@@ -569,7 +566,6 @@ static void rv128_base_cpu_init(Object *obj)
     CPURISCVState *env = &RISCV_CPU(obj)->env;
     /* We set this in the realise function */
     set_misa(env, MXL_RV128, 0);
-    riscv_cpu_add_user_properties(obj);
     /* Set latest version of privileged specification */
     env->priv_ver = PRIV_VERSION_LATEST;
 #ifndef CONFIG_USER_ONLY
@@ -582,7 +578,6 @@ static void rv32_base_cpu_init(Object *obj)
     CPURISCVState *env = &RISCV_CPU(obj)->env;
     /* We set this in the realise function */
     set_misa(env, MXL_RV32, 0);
-    riscv_cpu_add_user_properties(obj);
     /* Set latest version of privileged specification */
     env->priv_ver = PRIV_VERSION_LATEST;
 #ifndef CONFIG_USER_ONLY
@@ -1212,6 +1207,20 @@ static void riscv_cpu_set_irq(void *opaque, int irq, int 
level)
 }
 #endif /* CONFIG_USER_ONLY */
 
+static void riscv_cpu_post_init(Object *obj)
+{
+    RISCVCPU *cpu = RISCV_CPU(obj);
+    RISCVCPUClass *rcc = RISCV_CPU_GET_CLASS(cpu);
+
+    if (rcc->user_extension_properties) {
+        riscv_cpu_add_user_properties(obj);
+    }
+
+    if (cpu->cfg.max_features) {
+        riscv_init_max_cpu_extensions(obj);
+    }
+}
+
 static void riscv_cpu_init(Object *obj)
 {
     RISCVCPU *cpu = RISCV_CPU(obj);
@@ -2019,6 +2028,7 @@ static const TypeInfo riscv_cpu_type_infos[] = {
         .instance_size = sizeof(RISCVCPU),
         .instance_align = __alignof__(RISCVCPU),
         .instance_init = riscv_cpu_init,
+        .instance_post_init = riscv_cpu_post_init,
         .abstract = true,
         .class_size = sizeof(RISCVCPUClass),
         .class_init = riscv_cpu_class_init,
-- 
2.41.0