[PATCH V5 3/4] qmp,nmi: convert do_inject_nmi() to QObject

[Lai Jiangshan <laijs@xxxxxxxxxxxxxx>]

Make we can inject NMI via qemu-monitor-protocol.
We use "inject-nmi" for the qmp command name, the meaning is clearer.

Signed-off-by:  Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
---
diff --git a/hmp-commands.hx b/hmp-commands.hx
index a49fcd4..4db413d 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -724,7 +724,8 @@ ETEXI
         .args_type  = "cpu-index:i?",
         .params     = "[cpu]",
         .help       = "inject an NMI on all CPUs or the given CPU",
-        .mhandler.cmd = do_inject_nmi,
+        .user_print = monitor_user_noop,
+        .mhandler.cmd_new = do_inject_nmi,
     },
 #endif
 STEXI
diff --git a/monitor.c b/monitor.c
index 952f67f..1bee840 100644
--- a/monitor.c
+++ b/monitor.c
@@ -2517,7 +2517,7 @@ static void do_wav_capture(Monitor *mon, const QDict *qdict)
 #endif
 
 #if defined(TARGET_I386)
-static void do_inject_nmi(Monitor *mon, const QDict *qdict)
+static int do_inject_nmi(Monitor *mon, const QDict *qdict, QObject **ret_data)
 {
     CPUState *env;
     int cpu_index;
@@ -2525,15 +2525,17 @@ static void do_inject_nmi(Monitor *mon, const QDict *qdict)
     if (!qdict_get(qdict, "cpu-index")) {
         for (env = first_cpu; env != NULL; env = env->next_cpu)
             cpu_interrupt(env, CPU_INTERRUPT_NMI);
-        return;
+        return 0;
     }
 
     cpu_index = qdict_get_int(qdict, "cpu-index");
     for (env = first_cpu; env != NULL; env = env->next_cpu)
         if (env->cpu_index == cpu_index) {
             cpu_interrupt(env, CPU_INTERRUPT_NMI);
-            break;
+            return 0;
         }
+
+    return -1;
 }
 #endif
 
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 56c4d8b..c2d619c 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -429,6 +429,33 @@ Example:
 
 EQMP
 
+#if defined(TARGET_I386)
+    {
+        .name       = "inject_nmi",
+        .args_type  = "cpu-index:i?",
+        .params     = "[cpu]",
+        .help       = "inject an NMI on all CPUs or the given CPU",
+        .user_print = monitor_user_noop,
+        .mhandler.cmd_new = do_inject_nmi,
+    },
+#endif
+SQMP
+inject_nmi
+----------
+
+Inject an NMI on the given CPU (x86 only).
+
+Arguments:
+
+- "cpu_index": the index of the CPU to be injected NMI (json-int)
+
+Example:
+
+-> { "execute": "inject_nmi", "arguments": { "cpu-index": 0 } }
+<- { "return": {} }
+
+EQMP
+
     {
         .name       = "migrate",
         .args_type  = "detach:-d,blk:-b,inc:-i,uri:s",
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