[PATCH 05/20] target/riscv/cpu.c: add 'user_extension_properties' class prop

[Daniel Henrique Barboza <dbarboza@ventanamicro.com>]

We want to use a post_init hook to call the cpu_instance_init callback
from each accelerator, moving repetitive code from the cpu_init()
functions to be handled by the accelerator class. But first we need to
ensure that we don't change behavior - vendor CPUs shouldn't expose user
properties, generic CPUs should expose.

Create a new 'user_extension_properties' class property. It'll be
initialized during the class init of each CPU type, where only generic
(dynamic) CPUs will enable it. This new property will be used shortly.

Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
---
 target/riscv/cpu-qom.h |  3 +++
 target/riscv/cpu.c     | 46 +++++++++++++++++++++++++++++++++---------
 2 files changed, 40 insertions(+), 9 deletions(-)

diff --git a/target/riscv/cpu-qom.h b/target/riscv/cpu-qom.h
index f3fbe37a2c..7c76dc0dcc 100644
--- a/target/riscv/cpu-qom.h
+++ b/target/riscv/cpu-qom.h
@@ -24,6 +24,7 @@
 
 #define TYPE_RISCV_CPU "riscv-cpu"
 #define TYPE_RISCV_DYNAMIC_CPU "riscv-dynamic-cpu"
+#define TYPE_RISCV_VENDOR_CPU "riscv-vendor-cpu"
 
 #define RISCV_CPU_TYPE_SUFFIX "-" TYPE_RISCV_CPU
 #define RISCV_CPU_TYPE_NAME(name) (name RISCV_CPU_TYPE_SUFFIX)
@@ -68,5 +69,7 @@ struct RISCVCPUClass {
     /*< public >*/
     DeviceRealize parent_realize;
     ResettablePhases parent_phases;
+
+    bool user_extension_properties;
 };
 #endif /* RISCV_CPU_QOM_H */
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 839b83e52a..e2e8724dc2 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -1975,6 +1975,20 @@ void riscv_cpu_list(void)
     g_slist_free(list);
 }
 
+static void riscv_dynamic_cpu_class_init(ObjectClass *c, void *data)
+{
+    RISCVCPUClass *rcc = RISCV_CPU_CLASS(c);
+
+    rcc->user_extension_properties = true;
+}
+
+static void riscv_vendor_cpu_class_init(ObjectClass *c, void *data)
+{
+    RISCVCPUClass *rcc = RISCV_CPU_CLASS(c);
+
+    rcc->user_extension_properties = false;
+}
+
 #define DEFINE_CPU(type_name, initfn)      \
     {                                      \
         .name = type_name,                 \
@@ -1989,6 +2003,13 @@ void riscv_cpu_list(void)
         .instance_init = initfn               \
     }
 
+#define DEFINE_VENDOR_CPU(type_name, initfn) \
+    {                                        \
+        .name = type_name,                   \
+        .parent = TYPE_RISCV_VENDOR_CPU,     \
+        .instance_init = initfn              \
+    }
+
 static const TypeInfo riscv_cpu_type_infos[] = {
     {
         .name = TYPE_RISCV_CPU,
@@ -2003,6 +2024,13 @@ static const TypeInfo riscv_cpu_type_infos[] = {
     {
         .name = TYPE_RISCV_DYNAMIC_CPU,
         .parent = TYPE_RISCV_CPU,
+        .class_init = riscv_dynamic_cpu_class_init,
+        .abstract = true,
+    },
+    {
+        .name = TYPE_RISCV_VENDOR_CPU,
+        .parent = TYPE_RISCV_CPU,
+        .class_init = riscv_vendor_cpu_class_init,
         .abstract = true,
     },
     DEFINE_DYNAMIC_CPU(TYPE_RISCV_CPU_ANY,      riscv_any_cpu_init),
@@ -2012,17 +2040,17 @@ static const TypeInfo riscv_cpu_type_infos[] = {
 #endif
 #if defined(TARGET_RISCV32)
     DEFINE_DYNAMIC_CPU(TYPE_RISCV_CPU_BASE32,   rv32_base_cpu_init),
-    DEFINE_CPU(TYPE_RISCV_CPU_IBEX,             rv32_ibex_cpu_init),
-    DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_E31,       rv32_sifive_e_cpu_init),
-    DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_E34,       rv32_imafcu_nommu_cpu_init),
-    DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_U34,       rv32_sifive_u_cpu_init),
+    DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_IBEX,             rv32_ibex_cpu_init),
+    DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_SIFIVE_E31,       rv32_sifive_e_cpu_init),
+    DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_SIFIVE_E34,       rv32_imafcu_nommu_cpu_init),
+    DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_SIFIVE_U34,       rv32_sifive_u_cpu_init),
 #elif defined(TARGET_RISCV64)
     DEFINE_DYNAMIC_CPU(TYPE_RISCV_CPU_BASE64,   rv64_base_cpu_init),
-    DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_E51,       rv64_sifive_e_cpu_init),
-    DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_U54,       rv64_sifive_u_cpu_init),
-    DEFINE_CPU(TYPE_RISCV_CPU_SHAKTI_C,         rv64_sifive_u_cpu_init),
-    DEFINE_CPU(TYPE_RISCV_CPU_THEAD_C906,       rv64_thead_c906_cpu_init),
-    DEFINE_CPU(TYPE_RISCV_CPU_VEYRON_V1,        rv64_veyron_v1_cpu_init),
+    DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_SIFIVE_E51,       rv64_sifive_e_cpu_init),
+    DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_SIFIVE_U54,       rv64_sifive_u_cpu_init),
+    DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_SHAKTI_C,         rv64_sifive_u_cpu_init),
+    DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_THEAD_C906,       rv64_thead_c906_cpu_init),
+    DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_VEYRON_V1,        rv64_veyron_v1_cpu_init),
     DEFINE_DYNAMIC_CPU(TYPE_RISCV_CPU_BASE128,  rv128_base_cpu_init),
 #endif
 };
-- 
2.41.0