Commit 91834e68 authored by Isaku Yamahata's avatar Isaku Yamahata Committed by Tony Luck

ia64/xen: preliminary support for save/restore.

preliminary support for save/restore.
Although Save/restore isn't fully working yet, this patch is necessary
to compile.
Signed-off-by: default avatarIsaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent a0df655c
......@@ -3,7 +3,7 @@
#
obj-y := hypercall.o xenivt.o xensetup.o xen_pv_ops.o irq_xen.o \
hypervisor.o xencomm.o xcom_hcall.o grant-table.o time.o
hypervisor.o xencomm.o xcom_hcall.o grant-table.o time.o suspend.o
obj-$(CONFIG_IA64_GENERIC) += machvec.o
......
/******************************************************************************
* arch/ia64/xen/suspend.c
*
* Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* suspend/resume
*/
#include <xen/xen-ops.h>
#include <asm/xen/hypervisor.h>
#include "time.h"
void
xen_mm_pin_all(void)
{
/* nothing */
}
void
xen_mm_unpin_all(void)
{
/* nothing */
}
void xen_pre_device_suspend(void)
{
/* nothing */
}
void
xen_pre_suspend()
{
/* nothing */
}
void
xen_post_suspend(int suspend_cancelled)
{
if (suspend_cancelled)
return;
xen_ia64_enable_opt_feature();
/* add more if necessary */
}
void xen_arch_resume(void)
{
xen_timer_resume_on_aps();
}
......@@ -26,6 +26,8 @@
#include <linux/irq.h>
#include <linux/clocksource.h>
#include <asm/timex.h>
#include <asm/xen/hypervisor.h>
#include <xen/interface/vcpu.h>
......@@ -178,3 +180,34 @@ struct pv_time_ops xen_time_ops __initdata = {
.do_steal_accounting = xen_do_steal_accounting,
.clocksource_resume = xen_itc_jitter_data_reset,
};
/* Called after suspend, to resume time. */
static void xen_local_tick_resume(void)
{
/* Just trigger a tick. */
ia64_cpu_local_tick();
touch_softlockup_watchdog();
}
void
xen_timer_resume(void)
{
unsigned int cpu;
xen_local_tick_resume();
for_each_online_cpu(cpu)
xen_init_missing_ticks_accounting(cpu);
}
static void ia64_cpu_local_tick_fn(void *unused)
{
xen_local_tick_resume();
xen_init_missing_ticks_accounting(smp_processor_id());
}
void
xen_timer_resume_on_aps(void)
{
smp_call_function(&ia64_cpu_local_tick_fn, NULL, 1);
}
......@@ -21,3 +21,4 @@
*/
extern struct pv_time_ops xen_time_ops __initdata;
void xen_timer_resume_on_aps(void);
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