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authorIsaku Yamahata <yamahata@valinux.co.jp>2008-07-08 15:06:32 -0700
committerIngo Molnar <mingo@elte.hu>2008-07-16 10:55:50 +0200
commitad55db9fed6d6cd09333045945cb03ba2c070085 (patch)
treea0f6acbb1c7d139b248b3a9f2d45d087b802936b
parent1ffb40b8ecdf314edd88dc5550d6bcbebf29970b (diff)
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xen: add xen_arch_resume()/xen_timer_resume hook for ia64 support
add xen_timer_resume() hook. Timer resume should be done after event channel is resumed. add xen_arch_resume() hook when ipi becomes usable after resume. After resume, some cpu specific resource must be reinitialized on ia64 that can't be set by another cpu. However available hooks is run once on only one cpu so that ipi has to be used. During stop_machine_run() ipi can't be used because interrupt is masked. So add another hook after stop_machine_run(). Another approach might be use resume hook which is run by device_resume(). However device_resume() may be executed on suspend error recovery path. So it is necessary to determine whether it is executed on real resume path or error recovery path. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--arch/x86/xen/suspend.c5
-rw-r--r--arch/x86/xen/xen-ops.h1
-rw-r--r--drivers/xen/manage.c6
-rw-r--r--include/xen/xen-ops.h3
4 files changed, 11 insertions, 4 deletions
diff --git a/arch/x86/xen/suspend.c b/arch/x86/xen/suspend.c
index 251669a932d..2a234db5949 100644
--- a/arch/x86/xen/suspend.c
+++ b/arch/x86/xen/suspend.c
@@ -38,8 +38,11 @@ void xen_post_suspend(int suspend_cancelled)
xen_cpu_initialized_map = cpu_online_map;
#endif
xen_vcpu_restore();
- xen_timer_resume();
}
}
+void xen_arch_resume(void)
+{
+ /* nothing */
+}
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index 6f4b1045c1c..77354d20425 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -37,7 +37,6 @@ void __init xen_time_init(void);
unsigned long xen_get_wallclock(void);
int xen_set_wallclock(unsigned long time);
unsigned long long xen_sched_clock(void);
-void xen_timer_resume(void);
irqreturn_t xen_debug_interrupt(int irq, void *dev_id);
diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
index 5b546e365f0..2bb268e4ac5 100644
--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -68,6 +68,7 @@ static int xen_suspend(void *data)
if (!*cancelled) {
xen_irq_resume();
xen_console_resume();
+ xen_timer_resume();
}
return 0;
@@ -107,9 +108,10 @@ static void do_suspend(void)
goto out;
}
- if (!cancelled)
+ if (!cancelled) {
+ xen_arch_resume();
xenbus_resume();
- else
+ } else
xenbus_suspend_cancel();
device_resume();
diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h
index a706d6a7896..883a21bba24 100644
--- a/include/xen/xen-ops.h
+++ b/include/xen/xen-ops.h
@@ -11,4 +11,7 @@ void xen_post_suspend(int suspend_cancelled);
void xen_mm_pin_all(void);
void xen_mm_unpin_all(void);
+void xen_timer_resume(void);
+void xen_arch_resume(void);
+
#endif /* INCLUDE_XEN_OPS_H */