Add the @arch_bitmask field to the HMPCommand structure,
allowing to restrict a command to a set of target
architectures (represented by the QEMU_ARCH_* enum constants).

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 monitor/monitor-internal.h | 6 ++++++
 monitor/hmp-target.c       | 1 +
 monitor/hmp.c              | 4 ++++
 3 files changed, 11 insertions(+)

diff --git a/monitor/monitor-internal.h b/monitor/monitor-internal.h
index 3ecd394ecf6..78281928e7a 100644
--- a/monitor/monitor-internal.h
+++ b/monitor/monitor-internal.h
@@ -74,6 +74,12 @@ typedef struct HMPCommand {
     const char *params;
     const char *help;
     const char *flags; /* p=preconfig */
+    /**
+     * @arch_bitmask: bitmask of QEMU_ARCH_* constants
+     *     Allow to restrict the command for a particular set of
+     *     target architectures.
+     */
+    uint32_t arch_bitmask;
     void (*cmd)(Monitor *mon, const QDict *qdict);
     /*
      * If implementing a command that takes no arguments and simply
diff --git a/monitor/hmp-target.c b/monitor/hmp-target.c
index d07e545ef7e..9d8dcb8835a 100644
--- a/monitor/hmp-target.c
+++ b/monitor/hmp-target.c
@@ -23,6 +23,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/base-arch-defs.h"
 #include "monitor-internal.h"
 #include "monitor/qdev.h"
 #include "net/slirp.h"
diff --git a/monitor/hmp.c b/monitor/hmp.c
index 3b9e180c1ca..c1e99c462b8 100644
--- a/monitor/hmp.c
+++ b/monitor/hmp.c
@@ -36,6 +36,7 @@
 #include "qemu/cutils.h"
 #include "qemu/log.h"
 #include "qemu/option.h"
+#include "qemu/base-arch-defs.h"
 #include "qemu/target-info.h"
 #include "qemu/units.h"
 #include "exec/gdbstub.h"
@@ -219,6 +220,9 @@ static bool cmd_can_preconfig(const HMPCommand *cmd)
 
 static bool cmd_available(const HMPCommand *cmd)
 {
+    if (cmd->arch_bitmask && !qemu_arch_available(cmd->arch_bitmask)) {
+        return false;
+    }
     return phase_check(PHASE_MACHINE_READY) || cmd_can_preconfig(cmd);
 }
 
-- 
2.53.0