HMP: Use QMP inject nmi implementation

This **CHANGES** the human monitor "nmi" command behavior.

Currently it accepts an CPU argument which, when provided, will send
the NMI to the specified CPU. This feature is of discussable value
though and HMP shouldn't have more features than QMP, so let's use
QMP's instead (it's also simpler).
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>

hmp-commands.hx

@@ -740,10 +740,11 @@ ETEXI
 #if defined(TARGET_I386)
     {
         .name       = "nmi",
-        .args_type  = "cpu_index:i",
-        .params     = "cpu",
-        .help       = "inject an NMI on the given CPU",
-        .mhandler.cmd = do_inject_nmi,
+        .args_type  = "",
+        .params     = "",
+        .help       = "inject an NMI on all guest's CPUs",
+        .user_print = monitor_user_noop,
+        .mhandler.cmd_new = do_inject_nmi,
     },
 #endif
 STEXI

monitor.c

@@ -2544,19 +2544,7 @@ 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)
-{
-    CPUState *env;
-    int 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;
-        }
-}
-
-static int do_inject_nmi_all(Monitor *mon, const QDict *qdict, QObject **ret_data)
+static int do_inject_nmi(Monitor *mon, const QDict *qdict, QObject **ret_data)
 {
     CPUState *env;
 
@@ -2567,7 +2555,7 @@ static int do_inject_nmi_all(Monitor *mon, const QDict *qdict, QObject **ret_dat
     return 0;
 }
 #else
-static int do_inject_nmi_all(Monitor *mon, const QDict *qdict, QObject **ret_data)
+static int do_inject_nmi(Monitor *mon, const QDict *qdict, QObject **ret_data)
 {
     qerror_report(QERR_UNSUPPORTED);
     return -1;

qmp-commands.hx

@@ -435,7 +435,7 @@ EQMP
         .params     = "",
         .help       = "",
         .user_print = monitor_user_noop,
-        .mhandler.cmd_new = do_inject_nmi_all,
+        .mhandler.cmd_new = do_inject_nmi,
     },
 
 SQMP