Beispiel #1
0
static void kdump_nmi_callback(int cpu, struct pt_regs *regs)
{
#ifdef CONFIG_X86_32
	struct pt_regs fixed_regs;

	if (!user_mode_vm(regs)) {
		crash_fixup_ss_esp(&fixed_regs, regs);
		regs = &fixed_regs;
	}
#endif
	crash_save_cpu(regs, cpu);

	/*
	 * VMCLEAR VMCSs loaded on all cpus if needed.
	 */
	cpu_crash_vmclear_loaded_vmcss();

	/* Disable VMX or SVM if needed.
	 *
	 * We need to disable virtualization on all CPUs.
	 * Having VMX or SVM enabled on any CPU may break rebooting
	 * after the kdump kernel has finished its task.
	 */
	cpu_emergency_vmxoff();
	cpu_emergency_svm_disable();

	disable_local_APIC();
}
Beispiel #2
0
asmlinkage __visible void smp_reboot_interrupt(void)
{
	ipi_entering_ack_irq();
	cpu_emergency_vmxoff();
	stop_this_cpu(NULL);
	irq_exit();
}
Beispiel #3
0
void native_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();

	kdump_nmi_shootdown_cpus();

	/* Booting kdump kernel with VMX or SVM enabled won't work,
	 * because (among other limitations) we can't disable paging
	 * with the virt flags.
	 */
	cpu_emergency_vmxoff();
	cpu_emergency_svm_disable();

	lapic_shutdown();
#if defined(CONFIG_X86_IO_APIC)
	disable_IO_APIC();
#endif
#ifdef CONFIG_HPET_TIMER
	hpet_disable();
#endif
	//crash_save_cpu(regs, safe_smp_processor_id());
}
Beispiel #4
0
void native_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();

	kdump_nmi_shootdown_cpus();

	/*
	 * VMCLEAR VMCSs loaded on this cpu if needed.
	 */
	cpu_crash_vmclear_loaded_vmcss();

	/* Booting kdump kernel with VMX or SVM enabled won't work,
	 * because (among other limitations) we can't disable paging
	 * with the virt flags.
	 */
	cpu_emergency_vmxoff();
	cpu_emergency_svm_disable();

	lapic_shutdown();
#if defined(CONFIG_X86_IO_APIC)
	disable_IO_APIC(1);
#endif
	if (mcp55_rewrite) {
		u32 cfg;
		printk(KERN_CRIT "REWRITING MCP55 CFG REG\n");
		/*
		 * We have a mcp55 chip on board which has been
		 * flagged as only sending legacy interrupts
		 * to the BSP, and we are crashing on an AP
		 * This is obviously bad, and we need to
		 * fix it up.  To do this we write to the
		 * flagged device, to the register at offset 0x74
		 * and we make sure that bit 2 and bit 15 are clear
		 * This forces legacy interrupts to be broadcast
		 * to all cpus
		 */
		pci_read_config_dword(mcp55_rewrite, 0x74, &cfg);
		cfg &= ~((1 << 2) | (1 << 15));
		printk(KERN_CRIT "CFG = %x\n", cfg);
		pci_write_config_dword(mcp55_rewrite, 0x74, cfg);
	}

#ifdef CONFIG_HPET_TIMER
	hpet_disable();
#endif

	crash_save_cpu(regs, safe_smp_processor_id());
}
Beispiel #5
0
static int smp_stop_nmi_callback(unsigned int val, struct pt_regs *regs)
{
	/* We are registered on stopping cpu too, avoid spurious NMI */
	if (raw_smp_processor_id() == atomic_read(&stopping_cpu))
		return NMI_HANDLED;

	cpu_emergency_vmxoff();
	stop_this_cpu(NULL);

	return NMI_HANDLED;
}
Beispiel #6
0
void native_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();

	kdump_nmi_shootdown_cpus();

	/*
	 * VMCLEAR VMCSs loaded on this cpu if needed.
	 */
	cpu_crash_vmclear_loaded_vmcss();

	/* Booting kdump kernel with VMX or SVM enabled won't work,
	 * because (among other limitations) we can't disable paging
	 * with the virt flags.
	 */
	cpu_emergency_vmxoff();
	cpu_emergency_svm_disable();

	/*
	 * Disable Intel PT to stop its logging
	 */
	cpu_emergency_stop_pt();

	lapic_shutdown();
#ifdef CONFIG_X86_IO_APIC
	/* Prevent crash_kexec() from deadlocking on ioapic_lock. */
	ioapic_zap_locks();
	disable_IO_APIC();
#endif
#ifdef CONFIG_HPET_TIMER
	hpet_disable();
#endif
	crash_save_cpu(regs, safe_smp_processor_id());
}
static void vmxoff_nmi(int cpu, struct pt_regs *regs)
{
	cpu_emergency_vmxoff();
}
Beispiel #8
0
static void vmxoff_nmi(int cpu, struct die_args *args)
{
	cpu_emergency_vmxoff();
}