---

yaml
---
r: 106167
b: refs/heads/master
c: 89081d1
h: refs/heads/master
i:
  106165: 88adefa
  106163: eea65cd
  106159: 9c12095
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3ab83521378268044a448113c6aa9a9e245f4d2f
+refs/heads/master: 89081d17f7bb81d89fa1aa9b70f821c5cf4d39e9

trunk/arch/x86/Kconfig

@@ -1282,9 +1282,10 @@ config CRASH_DUMP
 config KEXEC_JUMP
 	bool "kexec jump (EXPERIMENTAL)"
 	depends on EXPERIMENTAL
-	depends on KEXEC && PM_SLEEP && X86_32
+	depends on KEXEC && HIBERNATION && X86_32
 	help
-	  Invoke code in physical address mode via KEXEC
+	  Jump between original kernel and kexeced kernel and invoke
+	  code in physical address mode via KEXEC
 
 config PHYSICAL_START
 	hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)

trunk/arch/x86/kernel/machine_kexec_32.c

@@ -125,6 +125,18 @@ void machine_kexec(struct kimage *image)
 	/* Interrupts aren't acceptable while we reboot */
 	local_irq_disable();
 
+	if (image->preserve_context) {
+#ifdef CONFIG_X86_IO_APIC
+		/* We need to put APICs in legacy mode so that we can
+		 * get timer interrupts in second kernel. kexec/kdump
+		 * paths already have calls to disable_IO_APIC() in
+		 * one form or other. kexec jump path also need
+		 * one.
+		 */
+		disable_IO_APIC();
+#endif
+	}
+
 	control_page = page_address(image->control_code_page);
 	memcpy(control_page, relocate_kernel, PAGE_SIZE/2);
 

trunk/include/linux/suspend.h

@@ -278,4 +278,6 @@ static inline void register_nosave_region_late(unsigned long b, unsigned long e)
 }
 #endif
 
+extern struct mutex pm_mutex;
+
 #endif /* _LINUX_SUSPEND_H */

trunk/kernel/kexec.c

@@ -26,6 +26,10 @@
 #include <linux/numa.h>
 #include <linux/suspend.h>
 #include <linux/device.h>
+#include <linux/freezer.h>
+#include <linux/pm.h>
+#include <linux/cpu.h>
+#include <linux/console.h>
 
 #include <asm/page.h>
 #include <asm/uaccess.h>
@@ -1441,7 +1445,31 @@ int kernel_kexec(void)
 
 	if (kexec_image->preserve_context) {
 #ifdef CONFIG_KEXEC_JUMP
+		mutex_lock(&pm_mutex);
+		pm_prepare_console();
+		error = freeze_processes();
+		if (error) {
+			error = -EBUSY;
+			goto Restore_console;
+		}
+		suspend_console();
+		error = device_suspend(PMSG_FREEZE);
+		if (error)
+			goto Resume_console;
+		error = disable_nonboot_cpus();
+		if (error)
+			goto Resume_devices;
 		local_irq_disable();
+		/* At this point, device_suspend() has been called,
+		 * but *not* device_power_down(). We *must*
+		 * device_power_down() now.  Otherwise, drivers for
+		 * some devices (e.g. interrupt controllers) become
+		 * desynchronized with the actual state of the
+		 * hardware at resume time, and evil weirdness ensues.
+		 */
+		error = device_power_down(PMSG_FREEZE);
+		if (error)
+			goto Enable_irqs;
 		save_processor_state();
 #endif
 	} else {
@@ -1459,7 +1487,18 @@ int kernel_kexec(void)
 	if (kexec_image->preserve_context) {
 #ifdef CONFIG_KEXEC_JUMP
 		restore_processor_state();
+		device_power_up(PMSG_RESTORE);
+ Enable_irqs:
 		local_irq_enable();
+		enable_nonboot_cpus();
+ Resume_devices:
+		device_resume(PMSG_RESTORE);
+ Resume_console:
+		resume_console();
+		thaw_processes();
+ Restore_console:
+		pm_restore_console();
+		mutex_unlock(&pm_mutex);
 #endif
 	}
 

trunk/kernel/power/power.h

@@ -53,8 +53,6 @@ extern int hibernation_platform_enter(void);
 
 extern int pfn_is_nosave(unsigned long);
 
-extern struct mutex pm_mutex;
-
 #define power_attr(_name) \
 static struct kobj_attribute _name##_attr = {	\
 	.attr	= {				\