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xen: add xen_arch_resume()/xen_timer_resume hook for ia64 support

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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>
This commit is contained in:
Isaku Yamahata 2008-07-08 15:06:32 -07:00 committed by Ingo Molnar
parent 1ffb40b8ec
commit ad55db9fed
4 changed files with 11 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/xen/suspend.c
View File

@ -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 */
}

1
arch/x86/xen/xen-ops.h
View File

@ -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);

6
drivers/xen/manage.c
View File

@ -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();

3
include/xen/xen-ops.h
View File

@ -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 */