1 files changed, 58 insertions, 41 deletions

diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index affa8e68124a..8342e65a140d 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -2,7 +2,7 @@
  *  arch/s390/kernel/ipl.c
  *    ipl/reipl/dump support for Linux on s390.
  *
- *    Copyright IBM Corp. 2005,2007
+ *    Copyright IBM Corp. 2005,2012
  *    Author(s): Michael Holzheu <holzheu@de.ibm.com>
  *               Heiko Carstens <heiko.carstens@de.ibm.com>
  *               Volker Sameske <sameske@de.ibm.com>
@@ -17,6 +17,7 @@
 #include <linux/fs.h>
 #include <linux/gfp.h>
 #include <linux/crash_dump.h>
+#include <linux/debug_locks.h>
 #include <asm/ipl.h>
 #include <asm/smp.h>
 #include <asm/setup.h>
@@ -25,8 +26,9 @@
 #include <asm/ebcdic.h>
 #include <asm/reset.h>
 #include <asm/sclp.h>
-#include <asm/sigp.h>
 #include <asm/checksum.h>
+#include <asm/debug.h>
+#include <asm/os_info.h>
 #include "entry.h"
 
 #define IPL_PARM_BLOCK_VERSION 0
@@ -571,7 +573,7 @@ static void __ipl_run(void *unused)
 
 static void ipl_run(struct shutdown_trigger *trigger)
 {
-        smp_switch_to_ipl_cpu(__ipl_run, NULL);
+        smp_call_ipl_cpu(__ipl_run, NULL);
 }
 
 static int __init ipl_init(void)
@@ -950,6 +952,13 @@ static struct attribute_group reipl_nss_attr_group = {
         .attrs = reipl_nss_attrs,
 };
 
+static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
+{
+        reipl_block_actual = reipl_block;
+        os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
+                          reipl_block->hdr.len);
+}
+
 /* reipl type */
 
 static int reipl_set_type(enum ipl_type type)
@@ -965,7 +974,7 @@ static int reipl_set_type(enum ipl_type type)
                         reipl_method = REIPL_METHOD_CCW_VM;
                 else
                         reipl_method = REIPL_METHOD_CCW_CIO;
-                reipl_block_actual = reipl_block_ccw;
+                set_reipl_block_actual(reipl_block_ccw);
                 break;
         case IPL_TYPE_FCP:
                 if (diag308_set_works)
@@ -974,7 +983,7 @@ static int reipl_set_type(enum ipl_type type)
                         reipl_method = REIPL_METHOD_FCP_RO_VM;
                 else
                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
-                reipl_block_actual = reipl_block_fcp;
+                set_reipl_block_actual(reipl_block_fcp);
                 break;
         case IPL_TYPE_FCP_DUMP:
                 reipl_method = REIPL_METHOD_FCP_DUMP;
@@ -984,7 +993,7 @@ static int reipl_set_type(enum ipl_type type)
                         reipl_method = REIPL_METHOD_NSS_DIAG;
                 else
                         reipl_method = REIPL_METHOD_NSS;
-                reipl_block_actual = reipl_block_nss;
+                set_reipl_block_actual(reipl_block_nss);
                 break;
         case IPL_TYPE_UNKNOWN:
                 reipl_method = REIPL_METHOD_DEFAULT;
@@ -1101,7 +1110,7 @@ static void __reipl_run(void *unused)
 
 static void reipl_run(struct shutdown_trigger *trigger)
 {
-        smp_switch_to_ipl_cpu(__reipl_run, NULL);
+        smp_call_ipl_cpu(__reipl_run, NULL);
 }
 
 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
@@ -1256,6 +1265,29 @@ static int __init reipl_fcp_init(void)
         return 0;
 }
 
+static int __init reipl_type_init(void)
+{
+        enum ipl_type reipl_type = ipl_info.type;
+        struct ipl_parameter_block *reipl_block;
+        unsigned long size;
+
+        reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
+        if (!reipl_block)
+                goto out;
+        /*
+         * If we have an OS info reipl block, this will be used
+         */
+        if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
+                memcpy(reipl_block_fcp, reipl_block, size);
+                reipl_type = IPL_TYPE_FCP;
+        } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
+                memcpy(reipl_block_ccw, reipl_block, size);
+                reipl_type = IPL_TYPE_CCW;
+        }
+out:
+        return reipl_set_type(reipl_type);
+}
+
 static int __init reipl_init(void)
 {
         int rc;
@@ -1277,10 +1309,7 @@ static int __init reipl_init(void)
         rc = reipl_nss_init();
         if (rc)
                 return rc;
-        rc = reipl_set_type(ipl_info.type);
-        if (rc)
-                return rc;
-        return 0;
+        return reipl_type_init();
 }
 
 static struct shutdown_action __refdata reipl_action = {
@@ -1421,7 +1450,7 @@ static void dump_run(struct shutdown_trigger *trigger)
         if (dump_method == DUMP_METHOD_NONE)
                 return;
         smp_send_stop();
-        smp_switch_to_ipl_cpu(__dump_run, NULL);
+        smp_call_ipl_cpu(__dump_run, NULL);
 }
 
 static int __init dump_ccw_init(void)
@@ -1499,30 +1528,12 @@ static struct shutdown_action __refdata dump_action = {
 
 static void dump_reipl_run(struct shutdown_trigger *trigger)
 {
-        preempt_disable();
-        /*
-         * Bypass dynamic address translation (DAT) when storing IPL parameter
-         * information block address and checksum into the prefix area
-         * (corresponding to absolute addresses 0-8191).
-         * When enhanced DAT applies and the STE format control in one,
-         * the absolute address is formed without prefixing. In this case a
-         * normal store (stg/st) into the prefix area would no more match to
-         * absolute addresses 0-8191.
-         */
-#ifdef CONFIG_64BIT
-        asm volatile("sturg %0,%1"
-                :: "a" ((unsigned long) reipl_block_actual),
-                "a" (&lowcore_ptr[smp_processor_id()]->ipib));
-#else
-        asm volatile("stura %0,%1"
-                :: "a" ((unsigned long) reipl_block_actual),
-                "a" (&lowcore_ptr[smp_processor_id()]->ipib));
-#endif
-        asm volatile("stura %0,%1"
-                :: "a" (csum_partial(reipl_block_actual,
-                                     reipl_block_actual->hdr.len, 0)),
-                "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
-        preempt_enable();
+        u32 csum;
+
+        csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
+        copy_to_absolute_zero(&S390_lowcore.ipib_checksum, &csum, sizeof(csum));
+        copy_to_absolute_zero(&S390_lowcore.ipib, &reipl_block_actual,
+                              sizeof(reipl_block_actual));
         dump_run(trigger);
 }
 
@@ -1623,9 +1634,7 @@ static void stop_run(struct shutdown_trigger *trigger)
         if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
             strcmp(trigger->name, ON_RESTART_STR) == 0)
                 disabled_wait((unsigned long) __builtin_return_address(0));
-        while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
-                cpu_relax();
-        for (;;);
+        smp_stop_cpu();
 }
 
 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
@@ -1713,6 +1722,7 @@ static struct kobj_attribute on_panic_attr =
 
 static void do_panic(void)
 {
+        lgr_info_log();
         on_panic_trigger.action->fn(&on_panic_trigger);
         stop_run(&on_panic_trigger);
 }
@@ -1738,9 +1748,8 @@ static ssize_t on_restart_store(struct kobject *kobj,
 static struct kobj_attribute on_restart_attr =
         __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
 
-void do_restart(void)
+static void __do_restart(void *ignore)
 {
-        smp_restart_with_online_cpu();
         smp_send_stop();
 #ifdef CONFIG_CRASH_DUMP
         crash_kexec(NULL);
@@ -1749,6 +1758,14 @@ void do_restart(void)
         stop_run(&on_restart_trigger);
 }
 
+void do_restart(void)
+{
+        tracing_off();
+        debug_locks_off();
+        lgr_info_log();
+        smp_call_online_cpu(__do_restart, NULL);
+}
+
 /* on halt */
 
 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};