ipmi: Add a force off function

Allow the IPMI interface to request a forced power off.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/ipmi/ipmi_bmc_extern.c

@@ -30,6 +30,7 @@
 #include <stdint.h>
 #include "qemu/timer.h"
 #include "sysemu/char.h"
+#include "sysemu/sysemu.h"
 #include "hw/ipmi/ipmi.h"
 
 #define VM_MSG_CHAR        0xA0 /* Marks end of message */
@@ -52,6 +53,7 @@
 #define   VM_CAPABILITIES_IRQ      0x04
 #define   VM_CAPABILITIES_NMI      0x08
 #define   VM_CAPABILITIES_ATTN     0x10
+#define VM_CMD_FORCEOFF            0x09
 
 #define TYPE_IPMI_BMC_EXTERN "ipmi-bmc-extern"
 #define IPMI_BMC_EXTERN(obj) OBJECT_CHECK(IPMIBmcExtern, (obj), \
@@ -268,6 +270,10 @@ static void handle_hw_op(IPMIBmcExtern *ibe, unsigned char hw_op)
     case VM_CMD_SEND_NMI:
         k->do_hw_op(s, IPMI_SEND_NMI, 0);
         break;
+
+    case VM_CMD_FORCEOFF:
+        qemu_system_shutdown_request();
+        break;
     }
 }