platform: Introduce new reboot type

Enhance reboot2 call to support MPIPL. Payload will call this interface
to initiate MPIPL.

Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
[oliver: rebased]
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>

core/platform.c

@@ -9,6 +9,7 @@
  * Copyright 2013-2019 IBM Corp.
  */
 
+#include <stdlib.h>
 #include <skiboot.h>
 #include <opal.h>
 #include <console.h>
@@ -104,6 +105,11 @@ static int64_t opal_cec_reboot2(uint32_t reboot_type, char *diag)
 	case OPAL_REBOOT_FULL_IPL:
 		disable_fast_reboot("full IPL reboot requested");
 		return opal_cec_reboot();
+	case OPAL_REBOOT_MPIPL:
+		prlog(PR_NOTICE, "Reboot: OS reported error. Performing MPIPL\n");
+		console_complete_flush();
+		_abort("Reboot: OS reported error. Performing MPIPL\n");
+		break;
 	default:
 		prlog(PR_NOTICE, "OPAL: Unsupported reboot request %d\n", reboot_type);
 		return OPAL_UNSUPPORTED;

doc/opal-api/opal-cec-reboot-6-116.rst

@@ -127,6 +127,13 @@ OPAL_REBOOT_FULL_IPL = 2
 	On platforms that don't support fast reboot, this is equivalent to a
 	normal reboot.
 
+OPAL_REBOOT_MPIPL = 3
+	Request for MPIPL reboot. Firmware will reboot the system and collect
+	dump.
+
+	On platforms that don't support MPIPL, this is equivalent to a
+	normal assert.
+
 Unsupported Reboot type
 	For unsupported reboot type, this function will return with
 	OPAL_UNSUPPORTED and no reboot will be triggered.

include/opal-api.h

@@ -1123,6 +1123,7 @@ enum {
 	OPAL_REBOOT_NORMAL = 0,
 	OPAL_REBOOT_PLATFORM_ERROR,
 	OPAL_REBOOT_FULL_IPL,
+	OPAL_REBOOT_MPIPL,
 };
 
 /* Argument to OPAL_PCI_TCE_KILL */