78c0617646
Enable NMI on all cpus in UV system and add an NMI handler
to dump_stack on each cpu.
By default on x86 all the cpus except the boot cpu have NMI
masked off. This patch enables NMI on all cpus in UV system
and adds an NMI handler to dump_stack on each cpu. This
way if a system hangs we can NMI the machine and get a
backtrace from all the cpus.
Version 2: Use x86_platform driver mechanism for nmi init, per
Ingo's suggestion.
Version 3: Clean up Ingo's nits.
Signed-off-by: Russ Anderson <rja@sgi.com>
LKML-Reference: <20100226164912.GA24439@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/*
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* Copyright (C) 2009 Thomas Gleixner <tglx@linutronix.de>
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*
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* For licencing details see kernel-base/COPYING
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*/
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#include <linux/init.h>
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#include <asm/bios_ebda.h>
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#include <asm/paravirt.h>
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#include <asm/mpspec.h>
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#include <asm/setup.h>
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#include <asm/apic.h>
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#include <asm/e820.h>
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#include <asm/time.h>
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#include <asm/irq.h>
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#include <asm/pat.h>
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#include <asm/tsc.h>
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#include <asm/iommu.h>
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void __cpuinit x86_init_noop(void) { }
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void __init x86_init_uint_noop(unsigned int unused) { }
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void __init x86_init_pgd_noop(pgd_t *unused) { }
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int __init iommu_init_noop(void) { return 0; }
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void iommu_shutdown_noop(void) { }
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/*
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* The platform setup functions are preset with the default functions
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* for standard PC hardware.
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*/
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struct x86_init_ops x86_init __initdata = {
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.resources = {
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.probe_roms = x86_init_noop,
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.reserve_resources = reserve_standard_io_resources,
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.memory_setup = default_machine_specific_memory_setup,
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},
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.mpparse = {
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.mpc_record = x86_init_uint_noop,
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.setup_ioapic_ids = x86_init_noop,
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.mpc_apic_id = default_mpc_apic_id,
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.smp_read_mpc_oem = default_smp_read_mpc_oem,
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.mpc_oem_bus_info = default_mpc_oem_bus_info,
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.find_smp_config = default_find_smp_config,
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.get_smp_config = default_get_smp_config,
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},
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.irqs = {
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.pre_vector_init = init_ISA_irqs,
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.intr_init = native_init_IRQ,
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.trap_init = x86_init_noop,
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},
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.oem = {
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.arch_setup = x86_init_noop,
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.banner = default_banner,
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},
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.paging = {
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.pagetable_setup_start = native_pagetable_setup_start,
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.pagetable_setup_done = native_pagetable_setup_done,
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},
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.timers = {
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.setup_percpu_clockev = setup_boot_APIC_clock,
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.tsc_pre_init = x86_init_noop,
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.timer_init = hpet_time_init,
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},
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.iommu = {
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.iommu_init = iommu_init_noop,
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},
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};
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struct x86_cpuinit_ops x86_cpuinit __cpuinitdata = {
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.setup_percpu_clockev = setup_secondary_APIC_clock,
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};
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static void default_nmi_init(void) { };
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struct x86_platform_ops x86_platform = {
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.calibrate_tsc = native_calibrate_tsc,
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.get_wallclock = mach_get_cmos_time,
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.set_wallclock = mach_set_rtc_mmss,
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.iommu_shutdown = iommu_shutdown_noop,
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.is_untracked_pat_range = is_ISA_range,
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.nmi_init = default_nmi_init
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};
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