target/riscv: Validate misa_mxl_max only once

misa_mxl_max is now a class member and initialized only once for each
class. This also moves the initialization of gdb_core_xml_file which
will be referenced before realization in the future.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20240103173349.398526-26-alex.bennee@linaro.org>
Message-Id: <20231213-riscv-v7-4-a760156a337f@daynix.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Alistair Francis <alistair.francis@wdc.com>

target/riscv/cpu.c

@@ -1292,6 +1292,26 @@ static const MISAExtInfo misa_ext_info_arr[] = {
     MISA_EXT_INFO(RVG, "g", "General purpose (IMAFD_Zicsr_Zifencei)"),
 };
 
+static void riscv_cpu_validate_misa_mxl(RISCVCPUClass *mcc)
+{
+    CPUClass *cc = CPU_CLASS(mcc);
+
+    /* Validate that MISA_MXL is set properly. */
+    switch (mcc->misa_mxl_max) {
+#ifdef TARGET_RISCV64
+    case MXL_RV64:
+    case MXL_RV128:
+        cc->gdb_core_xml_file = "riscv-64bit-cpu.xml";
+        break;
+#endif
+    case MXL_RV32:
+        cc->gdb_core_xml_file = "riscv-32bit-cpu.xml";
+        break;
+    default:
+        g_assert_not_reached();
+    }
+}
+
 static int riscv_validate_misa_info_idx(uint32_t bit)
 {
     int idx;
@@ -1833,6 +1853,7 @@ static void riscv_cpu_class_init(ObjectClass *c, void *data)
     RISCVCPUClass *mcc = RISCV_CPU_CLASS(c);
 
     mcc->misa_mxl_max = (uint32_t)(uintptr_t)data;
+    riscv_cpu_validate_misa_mxl(mcc);
 }
 
 static void riscv_isa_string_ext(RISCVCPU *cpu, char **isa_str,

target/riscv/tcg/tcg-cpu.c

@@ -268,27 +268,6 @@ static void riscv_cpu_validate_misa_priv(CPURISCVState *env, Error **errp)
     }
 }
 
-static void riscv_cpu_validate_misa_mxl(RISCVCPU *cpu)
-{
-    RISCVCPUClass *mcc = RISCV_CPU_GET_CLASS(cpu);
-    CPUClass *cc = CPU_CLASS(mcc);
-
-    /* Validate that MISA_MXL is set properly. */
-    switch (mcc->misa_mxl_max) {
-#ifdef TARGET_RISCV64
-    case MXL_RV64:
-    case MXL_RV128:
-        cc->gdb_core_xml_file = "riscv-64bit-cpu.xml";
-        break;
-#endif
-    case MXL_RV32:
-        cc->gdb_core_xml_file = "riscv-32bit-cpu.xml";
-        break;
-    default:
-        g_assert_not_reached();
-    }
-}
-
 static void riscv_cpu_validate_priv_spec(RISCVCPU *cpu, Error **errp)
 {
     CPURISCVState *env = &cpu->env;
@@ -935,8 +914,6 @@ static bool tcg_cpu_realize(CPUState *cs, Error **errp)
         return false;
     }
 
-    riscv_cpu_validate_misa_mxl(cpu);
-
 #ifndef CONFIG_USER_ONLY
     CPURISCVState *env = &cpu->env;
     Error *local_err = NULL;