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authorIsaku Yamahata <yamahata@valinux.co.jp>2008-10-17 11:18:10 +0900
committerTony Luck <tony.luck@intel.com>2008-10-17 10:09:25 -0700
commit91834e685d2059b69c4e8e3d707f35d94438de94 (patch)
treec97e5d8c2b8fe8de49b9cd32c592ecec4eb3c47a /arch/ia64/xen
parenta0df655ccd0669bd3efc85346dc816833dd1197f (diff)
downloadlinux-91834e685d2059b69c4e8e3d707f35d94438de94.tar.bz2
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: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/xen')
-rw-r--r--arch/ia64/xen/Makefile2
-rw-r--r--arch/ia64/xen/suspend.c64
-rw-r--r--arch/ia64/xen/time.c33
-rw-r--r--arch/ia64/xen/time.h1
4 files changed, 99 insertions, 1 deletions
diff --git a/arch/ia64/xen/Makefile b/arch/ia64/xen/Makefile
index 972d085567d9..0ad0224693d9 100644
--- a/arch/ia64/xen/Makefile
+++ b/arch/ia64/xen/Makefile
@@ -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
diff --git a/arch/ia64/xen/suspend.c b/arch/ia64/xen/suspend.c
new file mode 100644
index 000000000000..fd66b048c6fa
--- /dev/null
+++ b/arch/ia64/xen/suspend.c
@@ -0,0 +1,64 @@
+/******************************************************************************
+ * 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();
+}
diff --git a/arch/ia64/xen/time.c b/arch/ia64/xen/time.c
index ec168ec754b2..d15a94c330fb 100644
--- a/arch/ia64/xen/time.c
+++ b/arch/ia64/xen/time.c
@@ -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);
+}
diff --git a/arch/ia64/xen/time.h b/arch/ia64/xen/time.h
index b9c7ec5f9cfa..f98d7e1a42f0 100644
--- a/arch/ia64/xen/time.h
+++ b/arch/ia64/xen/time.h
@@ -21,3 +21,4 @@
*/
extern struct pv_time_ops xen_time_ops __initdata;
+void xen_timer_resume_on_aps(void);