[S390] kdump backend code

This patch provides the architecture specific part of the s390 kdump
support.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 90769b4bc7f6..ca0520c52547 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -16,6 +16,7 @@
 #include <linux/ctype.h>
 #include <linux/fs.h>
 #include <linux/gfp.h>
+#include <linux/crash_dump.h>
 #include <asm/ipl.h>
 #include <asm/smp.h>
 #include <asm/setup.h>
@@ -1740,6 +1741,9 @@ void do_restart(void)
 {
         smp_restart_with_online_cpu();
         smp_send_stop();
+#ifdef CONFIG_CRASH_DUMP
+        crash_kexec(NULL);
+#endif
         on_restart_trigger.action->fn(&on_restart_trigger);
         stop_run(&on_restart_trigger);
 }
@@ -2010,7 +2014,7 @@ static void do_reset_calls(void)
 
 u32 dump_prefix_page;
 
-void s390_reset_system(void)
+void s390_reset_system(void (*func)(void *), void *data)
 {
         struct _lowcore *lc;
 
@@ -2038,6 +2042,10 @@ void s390_reset_system(void)
         S390_lowcore.program_new_psw.addr =
                 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
 
+        /* Store status at absolute zero */
+        store_status();
+
         do_reset_calls();
+        if (func)
+                func(data);
 }
-