x86_64: prepare shared kernel/crash.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86_64/kernel/Makefile b/arch/x86_64/kernel/Makefile
index c17099e..5ddd94b 100644 (file)
--- a/arch/x86_64/kernel/Makefile
+++ b/arch/x86_64/kernel/Makefile
@@ -23,7 +23,7 @@ obj-$(CONFIG_X86_CPUID)               += cpuid.o
 obj-$(CONFIG_SMP)              += smp_64.o smpboot.o trampoline.o tsc_sync.o
 obj-y                          += apic.o  nmi.o
 obj-y                          += io_apic_64.o mpparse.o genapic.o genapic_flat.o
-obj-$(CONFIG_KEXEC)            += machine_kexec.o relocate_kernel_64.o crash.o
+obj-$(CONFIG_KEXEC)            += machine_kexec.o relocate_kernel_64.o crash_64.o
 obj-$(CONFIG_CRASH_DUMP)       += crash_dump.o
 obj-$(CONFIG_PM)               += suspend.o
 obj-$(CONFIG_HIBERNATION)      += suspend_asm.o

diff --git a/arch/x86_64/kernel/crash.c b/arch/x86_64/kernel/crash.c
deleted file mode 100644 (file)
index 13432a1..0000000
--- a/arch/x86_64/kernel/crash.c
+++ /dev/null
@@ -1,135 +0,0 @@
-/*
- * Architecture specific (x86_64) functions for kexec based crash dumps.
- *
- * Created by: Hariprasad Nellitheertha (hari@in.ibm.com)
- *
- * Copyright (C) IBM Corporation, 2004. All rights reserved.
- *
- */
-
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/smp.h>
-#include <linux/irq.h>
-#include <linux/reboot.h>
-#include <linux/kexec.h>
-#include <linux/delay.h>
-#include <linux/elf.h>
-#include <linux/elfcore.h>
-#include <linux/kdebug.h>
-
-#include <asm/processor.h>
-#include <asm/hardirq.h>
-#include <asm/nmi.h>
-#include <asm/hw_irq.h>
-#include <asm/mach_apic.h>
-
-/* This keeps a track of which one is crashing cpu. */
-static int crashing_cpu;
-
-#ifdef CONFIG_SMP
-static atomic_t waiting_for_crash_ipi;
-
-static int crash_nmi_callback(struct notifier_block *self,
-                               unsigned long val, void *data)
-{
-       struct pt_regs *regs;
-       int cpu;
-
-       if (val != DIE_NMI_IPI)
-               return NOTIFY_OK;
-
-       regs = ((struct die_args *)data)->regs;
-       cpu = raw_smp_processor_id();
-
-       /*
-        * Don't do anything if this handler is invoked on crashing cpu.
-        * Otherwise, system will completely hang. Crashing cpu can get
-        * an NMI if system was initially booted with nmi_watchdog parameter.
-        */
-       if (cpu == crashing_cpu)
-               return NOTIFY_STOP;
-       local_irq_disable();
-
-       crash_save_cpu(regs, cpu);
-       disable_local_APIC();
-       atomic_dec(&waiting_for_crash_ipi);
-       /* Assume hlt works */
-       for(;;)
-               halt();
-
-       return 1;
-}
-
-static void smp_send_nmi_allbutself(void)
-{
-       send_IPI_allbutself(NMI_VECTOR);
-}
-
-/*
- * This code is a best effort heuristic to get the
- * other cpus to stop executing. So races with
- * cpu hotplug shouldn't matter.
- */
-
-static struct notifier_block crash_nmi_nb = {
-       .notifier_call = crash_nmi_callback,
-};
-
-static void nmi_shootdown_cpus(void)
-{
-       unsigned long msecs;
-
-       atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
-       if (register_die_notifier(&crash_nmi_nb))
-               return;         /* return what? */
-
-       /*
-        * Ensure the new callback function is set before sending
-        * out the NMI
-        */
-       wmb();
-
-       smp_send_nmi_allbutself();
-
-       msecs = 1000; /* Wait at most a second for the other cpus to stop */
-       while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) {
-               mdelay(1);
-               msecs--;
-       }
-       /* Leave the nmi callback set */
-       disable_local_APIC();
-}
-#else
-static void nmi_shootdown_cpus(void)
-{
-       /* There are no cpus to shootdown */
-}
-#endif
-
-void machine_crash_shutdown(struct pt_regs *regs)
-{
-       /*
-        * This function is only called after the system
-        * has panicked or is otherwise in a critical state.
-        * The minimum amount of code to allow a kexec'd kernel
-        * to run successfully needs to happen here.
-        *
-        * In practice this means shooting down the other cpus in
-        * an SMP system.
-        */
-       /* The kernel is broken so disable interrupts */
-       local_irq_disable();
-
-       /* Make a note of crashing cpu. Will be used in NMI callback.*/
-       crashing_cpu = smp_processor_id();
-       nmi_shootdown_cpus();
-
-       if(cpu_has_apic)
-                disable_local_APIC();
-
-       disable_IO_APIC();
-
-       crash_save_cpu(regs, smp_processor_id());
-}

diff --git a/arch/x86_64/kernel/crash_64.c b/arch/x86_64/kernel/crash_64.c
new file mode 100644 (file)
index 0000000..13432a1
--- /dev/null
+++ b/arch/x86_64/kernel/crash_64.c
@@ -0,0 +1,135 @@
+/*
+ * Architecture specific (x86_64) functions for kexec based crash dumps.
+ *
+ * Created by: Hariprasad Nellitheertha (hari@in.ibm.com)
+ *
+ * Copyright (C) IBM Corporation, 2004. All rights reserved.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/smp.h>
+#include <linux/irq.h>
+#include <linux/reboot.h>
+#include <linux/kexec.h>
+#include <linux/delay.h>
+#include <linux/elf.h>
+#include <linux/elfcore.h>
+#include <linux/kdebug.h>
+
+#include <asm/processor.h>
+#include <asm/hardirq.h>
+#include <asm/nmi.h>
+#include <asm/hw_irq.h>
+#include <asm/mach_apic.h>
+
+/* This keeps a track of which one is crashing cpu. */
+static int crashing_cpu;
+
+#ifdef CONFIG_SMP
+static atomic_t waiting_for_crash_ipi;
+
+static int crash_nmi_callback(struct notifier_block *self,
+                               unsigned long val, void *data)
+{
+       struct pt_regs *regs;
+       int cpu;
+
+       if (val != DIE_NMI_IPI)
+               return NOTIFY_OK;
+
+       regs = ((struct die_args *)data)->regs;
+       cpu = raw_smp_processor_id();
+
+       /*
+        * Don't do anything if this handler is invoked on crashing cpu.
+        * Otherwise, system will completely hang. Crashing cpu can get
+        * an NMI if system was initially booted with nmi_watchdog parameter.
+        */
+       if (cpu == crashing_cpu)
+               return NOTIFY_STOP;
+       local_irq_disable();
+
+       crash_save_cpu(regs, cpu);
+       disable_local_APIC();
+       atomic_dec(&waiting_for_crash_ipi);
+       /* Assume hlt works */
+       for(;;)
+               halt();
+
+       return 1;
+}
+
+static void smp_send_nmi_allbutself(void)
+{
+       send_IPI_allbutself(NMI_VECTOR);
+}
+
+/*
+ * This code is a best effort heuristic to get the
+ * other cpus to stop executing. So races with
+ * cpu hotplug shouldn't matter.
+ */
+
+static struct notifier_block crash_nmi_nb = {
+       .notifier_call = crash_nmi_callback,
+};
+
+static void nmi_shootdown_cpus(void)
+{
+       unsigned long msecs;
+
+       atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
+       if (register_die_notifier(&crash_nmi_nb))
+               return;         /* return what? */
+
+       /*
+        * Ensure the new callback function is set before sending
+        * out the NMI
+        */
+       wmb();
+
+       smp_send_nmi_allbutself();
+
+       msecs = 1000; /* Wait at most a second for the other cpus to stop */
+       while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) {
+               mdelay(1);
+               msecs--;
+       }
+       /* Leave the nmi callback set */
+       disable_local_APIC();
+}
+#else
+static void nmi_shootdown_cpus(void)
+{
+       /* There are no cpus to shootdown */
+}
+#endif
+
+void machine_crash_shutdown(struct pt_regs *regs)
+{
+       /*
+        * This function is only called after the system
+        * has panicked or is otherwise in a critical state.
+        * The minimum amount of code to allow a kexec'd kernel
+        * to run successfully needs to happen here.
+        *
+        * In practice this means shooting down the other cpus in
+        * an SMP system.
+        */
+       /* The kernel is broken so disable interrupts */
+       local_irq_disable();
+
+       /* Make a note of crashing cpu. Will be used in NMI callback.*/
+       crashing_cpu = smp_processor_id();
+       nmi_shootdown_cpus();
+
+       if(cpu_has_apic)
+                disable_local_APIC();
+
+       disable_IO_APIC();
+
+       crash_save_cpu(regs, smp_processor_id());
+}