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x86: unify crash_32/64.c

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Most of contents in crash are same.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Hiroshi Shimamoto 2007-10-19 18:24:20 -07:00 committed by Thomas Gleixner
parent 92f98b19bc
commit 62a31a03b3
4 changed files with 11 additions and 139 deletions
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2
arch/x86/kernel/Makefile_32
View file

@ -26,7 +26,7 @@ obj-$(CONFIG_X86_MPPARSE) += mpparse_32.o
obj-$(CONFIG_X86_LOCAL_APIC) += apic_32.o nmi_32.o
obj-$(CONFIG_X86_IO_APIC) += io_apic_32.o
obj-$(CONFIG_X86_REBOOTFIXUPS) += reboot_fixups_32.o
obj-$(CONFIG_KEXEC) += machine_kexec_32.o relocate_kernel_32.o crash_32.o
obj-$(CONFIG_KEXEC) += machine_kexec_32.o relocate_kernel_32.o crash.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump_32.o
obj-$(CONFIG_X86_NUMAQ) += numaq_32.o
obj-$(CONFIG_X86_SUMMIT_NUMA) += summit_32.o

2
arch/x86/kernel/Makefile_64
View file

@ -23,7 +23,7 @@ obj-$(CONFIG_X86_CPUID) += cpuid.o
obj-$(CONFIG_SMP) += smp_64.o smpboot_64.o trampoline_64.o tsc_sync.o
obj-y += apic_64.o nmi_64.o
obj-y += io_apic_64.o mpparse_64.o genapic_64.o genapic_flat_64.o
obj-$(CONFIG_KEXEC) += machine_kexec_64.o relocate_kernel_64.o crash_64.o
obj-$(CONFIG_KEXEC) += machine_kexec_64.o relocate_kernel_64.o crash.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump_64.o
obj-$(CONFIG_PM) += suspend_64.o
obj-$(CONFIG_HIBERNATION) += suspend_asm_64.o

11
arch/x86/kernel/crash_32.c → arch/x86/kernel/crash.c
View file

@ -1,5 +1,5 @@
/*
* Architecture specific (i386) functions for kexec based crash dumps.
* Architecture specific (i386/x86_64) functions for kexec based crash dumps.
*
* Created by: Hariprasad Nellitheertha (hari@in.ibm.com)
*
@ -25,8 +25,11 @@
#include <linux/kdebug.h>
#include <asm/smp.h>
#ifdef X86_32
#include <mach_ipi.h>
#else
#include <asm/mach_apic.h>
#endif
/* This keeps a track of which one is crashing cpu. */
static int crashing_cpu;
@ -38,7 +41,9 @@ static int crash_nmi_callback(struct notifier_block *self,
unsigned long val, void *data)
{
struct pt_regs *regs;
#ifdef X86_32
struct pt_regs fixed_regs;
#endif
int cpu;
if (val != DIE_NMI_IPI)
@ -55,10 +60,12 @@ static int crash_nmi_callback(struct notifier_block *self,
return NOTIFY_STOP;
local_irq_disable();
#ifdef X86_32
if (!user_mode_vm(regs)) {
crash_fixup_ss_esp(&fixed_regs, regs);
regs = &fixed_regs;
}
#endif
crash_save_cpu(regs, cpu);
disable_local_APIC();
atomic_dec(&waiting_for_crash_ipi);

135
arch/x86/kernel/crash_64.c
View file

@ -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());
}