[RFC PATCH 1/3] target/mips: Make cpu_mips_realize_env() propagate Error

["Philippe Mathieu-Daudé" <f4bug@amsat.org>]

To be able to propagate error to our caller, make
cpu_mips_realize_env() take an Error argument and
return a boolean value indicating an error is set or
not, following the example documented since commit
e3fe3988d7 ("error: Document Error API usage rules").

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 target/mips/internal.h  | 10 +++++++++-
 target/mips/cpu.c       |  4 +++-
 target/mips/translate.c |  4 +++-
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/target/mips/internal.h b/target/mips/internal.h
index 7f159a9230c..c2b2e79c515 100644
--- a/target/mips/internal.h
+++ b/target/mips/internal.h
@@ -206,7 +206,15 @@ void mips_tcg_init(void);
 
 /* TODO QOM'ify CPU reset and remove */
 void cpu_state_reset(CPUMIPSState *s);
-void cpu_mips_realize_env(CPUMIPSState *env);
+
+/**
+ * cpu_mips_realize_env: Realize CPUMIPSState
+ * @env: CPUMIPSState object
+ * @errp: pointer to error object
+ * On success, return %true.
+ * On failure, store an error through @errp and return %false.
+ */
+bool cpu_mips_realize_env(CPUMIPSState *env, Error **errp);
 
 /* cp0_timer.c */
 uint32_t cpu_mips_get_random(CPUMIPSState *env);
diff --git a/target/mips/cpu.c b/target/mips/cpu.c
index e86cd065483..117c748345e 100644
--- a/target/mips/cpu.c
+++ b/target/mips/cpu.c
@@ -147,7 +147,9 @@ static void mips_cpu_realizefn(DeviceState *dev, Error **errp)
         return;
     }
 
-    cpu_mips_realize_env(&cpu->env);
+    if (!cpu_mips_realize_env(&cpu->env, errp)) {
+        return;
+    }
 
     cpu_reset(cs);
     qemu_init_vcpu(cs);
diff --git a/target/mips/translate.c b/target/mips/translate.c
index 398edf72898..4c9b6216321 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -31316,7 +31316,7 @@ void mips_tcg_init(void)
 
 #include "translate_init.c.inc"
 
-void cpu_mips_realize_env(CPUMIPSState *env)
+bool cpu_mips_realize_env(CPUMIPSState *env, Error **errp)
 {
     env->exception_base = (int32_t)0xBFC00000;
 
@@ -31325,6 +31325,8 @@ void cpu_mips_realize_env(CPUMIPSState *env)
 #endif
     fpu_init(env, env->cpu_model);
     mvp_init(env, env->cpu_model);
+
+    return true;
 }
 
 bool cpu_supports_cps_smp(const char *cpu_type)
-- 
2.26.2