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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] [LINUX] Clean up reboot.c suspend handling.
# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Node ID 7ee2c02c6db072199a59055f6a2d11d4f36c165c
# Parent e5c84586c333c7be0a70228cca51865c29bab21c
[LINUX] Clean up reboot.c suspend handling.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
linux-2.6-xen-sparse/arch/i386/mm/pgtable-xen.c | 5
linux-2.6-xen-sparse/drivers/xen/core/reboot.c | 148 ++++++++++++------------
2 files changed, 80 insertions(+), 73 deletions(-)
diff -r e5c84586c333 -r 7ee2c02c6db0
linux-2.6-xen-sparse/arch/i386/mm/pgtable-xen.c
--- a/linux-2.6-xen-sparse/arch/i386/mm/pgtable-xen.c Fri Jul 28 10:51:38
2006 +0100
+++ b/linux-2.6-xen-sparse/arch/i386/mm/pgtable-xen.c Fri Jul 28 11:10:08
2006 +0100
@@ -652,8 +652,13 @@ void mm_pin_all(void)
void mm_pin_all(void)
{
struct page *page;
+
+ /* Only pgds on the pgd_list please: none hidden in the slab cache. */
+ kmem_cache_shrink(pgd_cache);
+
if (xen_feature(XENFEAT_writable_page_tables))
return;
+
for (page = pgd_list; page; page = (struct page *)page->index) {
if (!test_bit(PG_pinned, &page->flags))
__pgd_pin((pgd_t *)page_address(page));
diff -r e5c84586c333 -r 7ee2c02c6db0
linux-2.6-xen-sparse/drivers/xen/core/reboot.c
--- a/linux-2.6-xen-sparse/drivers/xen/core/reboot.c Fri Jul 28 10:51:38
2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/core/reboot.c Fri Jul 28 11:10:08
2006 +0100
@@ -19,14 +19,6 @@
#include <xen/xencons.h>
#include <xen/cpu_hotplug.h>
-#if defined(__i386__) || defined(__x86_64__)
-/*
- * Power off function, if any
- */
-void (*pm_power_off)(void);
-EXPORT_SYMBOL(pm_power_off);
-#endif
-
extern void ctrl_alt_del(void);
#define SHUTDOWN_INVALID -1
@@ -40,6 +32,13 @@ extern void ctrl_alt_del(void);
#define SHUTDOWN_HALT 4
#if defined(__i386__) || defined(__x86_64__)
+
+/*
+ * Power off function, if any
+ */
+void (*pm_power_off)(void);
+EXPORT_SYMBOL(pm_power_off);
+
void machine_emergency_restart(void)
{
/* We really want to get pending console data out before we die. */
@@ -70,7 +69,8 @@ EXPORT_SYMBOL(machine_restart);
EXPORT_SYMBOL(machine_restart);
EXPORT_SYMBOL(machine_halt);
EXPORT_SYMBOL(machine_power_off);
-#endif
+
+#endif /* defined(__i386__) || defined(__x86_64__) */
/******************************************************************************
* Stop/pickle callback handling.
@@ -82,6 +82,7 @@ static DECLARE_WORK(shutdown_work, __shu
static DECLARE_WORK(shutdown_work, __shutdown_handler, NULL);
#if defined(__i386__) || defined(__x86_64__)
+
/* Ensure we run on the idle task page tables so that we will
switch page tables before running user space. This is needed
on architectures with separate kernel and user page tables
@@ -98,70 +99,23 @@ static void switch_idle_mm(void)
current->active_mm = &init_mm;
mmdrop(mm);
}
-#endif
-
-static int __do_suspend(void *ignore)
-{
- int err;
-#if defined(__i386__) || defined(__x86_64__)
+
+static void pre_suspend(void)
+{
+ HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
+ clear_fixmap(FIX_SHARED_INFO);
+
+ xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
+ xen_start_info->console_mfn = mfn_to_pfn(xen_start_info->console_mfn);
+}
+
+static void post_suspend(void)
+{
int i, j, k, fpp;
extern unsigned long max_pfn;
extern unsigned long *pfn_to_mfn_frame_list_list;
extern unsigned long *pfn_to_mfn_frame_list[];
-#endif
-
- extern void time_resume(void);
-
- BUG_ON(smp_processor_id() != 0);
- BUG_ON(in_interrupt());
-
-#if defined(__i386__) || defined(__x86_64__)
- if (xen_feature(XENFEAT_auto_translated_physmap)) {
- printk(KERN_WARNING "Cannot suspend in "
- "auto_translated_physmap mode.\n");
- return -EOPNOTSUPP;
- }
-#endif
-
- err = smp_suspend();
- if (err)
- return err;
-
- xenbus_suspend();
-
- preempt_disable();
-
-#ifdef __i386__
- kmem_cache_shrink(pgd_cache);
-#endif
-#if defined(__i386__) || defined(__x86_64__)
- mm_pin_all();
-
- __cli();
-#elif defined(__ia64__)
- local_irq_disable();
-#endif
- preempt_enable();
-
- gnttab_suspend();
-
-#if defined(__i386__) || defined(__x86_64__)
- HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
- clear_fixmap(FIX_SHARED_INFO);
-
- xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
- xen_start_info->console_mfn = mfn_to_pfn(xen_start_info->console_mfn);
-#endif
-
- /*
- * We'll stop somewhere inside this hypercall. When it returns,
- * we'll start resuming after the restore.
- */
- HYPERVISOR_suspend(virt_to_mfn(xen_start_info));
-
- shutting_down = SHUTDOWN_INVALID;
-
-#if defined(__i386__) || defined(__x86_64__)
+
set_fixmap(FIX_SHARED_INFO, xen_start_info->shared_info);
HYPERVISOR_shared_info = (shared_info_t *)fix_to_virt(FIX_SHARED_INFO);
@@ -183,21 +137,69 @@ static int __do_suspend(void *ignore)
virt_to_mfn(&phys_to_machine_mapping[i]);
}
HYPERVISOR_shared_info->arch.max_pfn = max_pfn;
+}
+
+#else /* !(defined(__i386__) || defined(__x86_64__)) */
+
+#define switch_idle_mm() ((void)0)
+#define mm_pin_all() ((void)0)
+#define pre_suspend() ((void)0)
+#define post_suspend() ((void)0)
+
#endif
+static int __do_suspend(void *ignore)
+{
+ int err;
+
+ extern void time_resume(void);
+
+ BUG_ON(smp_processor_id() != 0);
+ BUG_ON(in_interrupt());
+
+#if defined(__i386__) || defined(__x86_64__)
+ if (xen_feature(XENFEAT_auto_translated_physmap)) {
+ printk(KERN_WARNING "Cannot suspend in "
+ "auto_translated_physmap mode.\n");
+ return -EOPNOTSUPP;
+ }
+#endif
+
+ err = smp_suspend();
+ if (err)
+ return err;
+
+ xenbus_suspend();
+
+ preempt_disable();
+
+ mm_pin_all();
+ local_irq_disable();
+ preempt_enable();
+
+ gnttab_suspend();
+
+ pre_suspend();
+
+ /*
+ * We'll stop somewhere inside this hypercall. When it returns,
+ * we'll start resuming after the restore.
+ */
+ HYPERVISOR_suspend(virt_to_mfn(xen_start_info));
+
+ shutting_down = SHUTDOWN_INVALID;
+
+ post_suspend();
+
gnttab_resume();
irq_resume();
time_resume();
-#if defined(__i386__) || defined(__x86_64__)
switch_idle_mm();
- __sti();
-#elif defined(__ia64__)
local_irq_enable();
-#endif
xencons_resume();
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