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authorSebastian Ott <sebott@linux.vnet.ibm.com>2013-08-29 19:36:49 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-08-30 08:57:15 +0200
commit77e844b9644026c11c5883144540155de39af767 (patch)
tree704f30cb7e9a30ade37e20c0f0bc9688f05ac0b0
parent0ff70ec88ba61f72b05b365a21fbd8aa60436254 (diff)
downloadlinux-77e844b9644026c11c5883144540155de39af767.tar.bz2
s390/hibernate: add early resume function
Some functions that do arch specific resume actions are called directly from swsusp_asm64.S . Before we add another function call provide a generic s390_early_resume function which can be used for this purpose. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--arch/s390/include/asm/cio.h1
-rw-r--r--arch/s390/kernel/suspend.c9
-rw-r--r--arch/s390/kernel/swsusp_asm64.S7
-rw-r--r--drivers/s390/cio/css.h2
4 files changed, 12 insertions, 7 deletions
diff --git a/arch/s390/include/asm/cio.h b/arch/s390/include/asm/cio.h
index ffb898961c8d..d42625053c37 100644
--- a/arch/s390/include/asm/cio.h
+++ b/arch/s390/include/asm/cio.h
@@ -296,6 +296,7 @@ static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
return 0;
}
+void channel_subsystem_reinit(void);
extern void css_schedule_reprobe(void);
extern void reipl_ccw_dev(struct ccw_dev_id *id);
diff --git a/arch/s390/kernel/suspend.c b/arch/s390/kernel/suspend.c
index c479d2f9605b..eebab9f83f1d 100644
--- a/arch/s390/kernel/suspend.c
+++ b/arch/s390/kernel/suspend.c
@@ -10,6 +10,8 @@
#include <linux/suspend.h>
#include <linux/mm.h>
#include <asm/ctl_reg.h>
+#include <asm/ipl.h>
+#include <asm/cio.h>
/*
* References to section boundaries
@@ -211,3 +213,10 @@ void restore_processor_state(void)
__ctl_set_bit(0,28);
local_mcck_enable();
}
+
+/* Called at the end of swsusp_arch_resume */
+void s390_early_resume(void)
+{
+ lgr_info_log();
+ channel_subsystem_reinit();
+}
diff --git a/arch/s390/kernel/swsusp_asm64.S b/arch/s390/kernel/swsusp_asm64.S
index c487be4cfc81..6b09fdffbd2f 100644
--- a/arch/s390/kernel/swsusp_asm64.S
+++ b/arch/s390/kernel/swsusp_asm64.S
@@ -281,11 +281,8 @@ restore_registers:
lghi %r2,0
brasl %r14,arch_set_page_states
- /* Log potential guest relocation */
- brasl %r14,lgr_info_log
-
- /* Reinitialize the channel subsystem */
- brasl %r14,channel_subsystem_reinit
+ /* Call arch specific early resume code */
+ brasl %r14,s390_early_resume
/* Return 0 */
lmg %r6,%r15,STACK_FRAME_OVERHEAD + __SF_GPRS(%r15)
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h
index b1de60335238..29351321bad6 100644
--- a/drivers/s390/cio/css.h
+++ b/drivers/s390/cio/css.h
@@ -130,8 +130,6 @@ struct channel_subsystem {
extern struct channel_subsystem *channel_subsystems[];
-void channel_subsystem_reinit(void);
-
/* Helper functions to build lists for the slow path. */
void css_schedule_eval(struct subchannel_id schid);
void css_schedule_eval_all(void);