cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

x86_init.c (4661B)

      1/*
      2 * Copyright (C) 2009 Thomas Gleixner <tglx@linutronix.de>
      3 *
      4 *  For licencing details see kernel-base/COPYING
      5 */
      6#include <linux/init.h>
      7#include <linux/ioport.h>
      8#include <linux/export.h>
      9#include <linux/pci.h>
     10
     11#include <asm/acpi.h>
     12#include <asm/bios_ebda.h>
     13#include <asm/paravirt.h>
     14#include <asm/pci_x86.h>
     15#include <asm/mpspec.h>
     16#include <asm/setup.h>
     17#include <asm/apic.h>
     18#include <asm/e820/api.h>
     19#include <asm/time.h>
     20#include <asm/irq.h>
     21#include <asm/io_apic.h>
     22#include <asm/hpet.h>
     23#include <asm/memtype.h>
     24#include <asm/tsc.h>
     25#include <asm/iommu.h>
     26#include <asm/mach_traps.h>
     27#include <asm/irqdomain.h>
     28
     29void x86_init_noop(void) { }
     30void __init x86_init_uint_noop(unsigned int unused) { }
     31static int __init iommu_init_noop(void) { return 0; }
     32static void iommu_shutdown_noop(void) { }
     33bool __init bool_x86_init_noop(void) { return false; }
     34void x86_op_int_noop(int cpu) { }
     35static __init int set_rtc_noop(const struct timespec64 *now) { return -EINVAL; }
     36static __init void get_rtc_noop(struct timespec64 *now) { }
     37
     38static __initconst const struct of_device_id of_cmos_match[] = {
     39	{ .compatible = "motorola,mc146818" },
     40	{}
     41};
     42
     43/*
     44 * Allow devicetree configured systems to disable the RTC by setting the
     45 * corresponding DT node's status property to disabled. Code is optimized
     46 * out for CONFIG_OF=n builds.
     47 */
     48static __init void x86_wallclock_init(void)
     49{
     50	struct device_node *node = of_find_matching_node(NULL, of_cmos_match);
     51
     52	if (node && !of_device_is_available(node)) {
     53		x86_platform.get_wallclock = get_rtc_noop;
     54		x86_platform.set_wallclock = set_rtc_noop;
     55	}
     56}
     57
     58/*
     59 * The platform setup functions are preset with the default functions
     60 * for standard PC hardware.
     61 */
     62struct x86_init_ops x86_init __initdata = {
     63
     64	.resources = {
     65		.probe_roms		= probe_roms,
     66		.reserve_resources	= reserve_standard_io_resources,
     67		.memory_setup		= e820__memory_setup_default,
     68	},
     69
     70	.mpparse = {
     71		.setup_ioapic_ids	= x86_init_noop,
     72		.find_smp_config	= default_find_smp_config,
     73		.get_smp_config		= default_get_smp_config,
     74	},
     75
     76	.irqs = {
     77		.pre_vector_init	= init_ISA_irqs,
     78		.intr_init		= native_init_IRQ,
     79		.intr_mode_select	= apic_intr_mode_select,
     80		.intr_mode_init		= apic_intr_mode_init,
     81		.create_pci_msi_domain	= native_create_pci_msi_domain,
     82	},
     83
     84	.oem = {
     85		.arch_setup		= x86_init_noop,
     86		.banner			= default_banner,
     87	},
     88
     89	.paging = {
     90		.pagetable_init		= native_pagetable_init,
     91	},
     92
     93	.timers = {
     94		.setup_percpu_clockev	= setup_boot_APIC_clock,
     95		.timer_init		= hpet_time_init,
     96		.wallclock_init		= x86_wallclock_init,
     97	},
     98
     99	.iommu = {
    100		.iommu_init		= iommu_init_noop,
    101	},
    102
    103	.pci = {
    104		.init			= x86_default_pci_init,
    105		.init_irq		= x86_default_pci_init_irq,
    106		.fixup_irqs		= x86_default_pci_fixup_irqs,
    107	},
    108
    109	.hyper = {
    110		.init_platform		= x86_init_noop,
    111		.guest_late_init	= x86_init_noop,
    112		.x2apic_available	= bool_x86_init_noop,
    113		.msi_ext_dest_id	= bool_x86_init_noop,
    114		.init_mem_mapping	= x86_init_noop,
    115		.init_after_bootmem	= x86_init_noop,
    116	},
    117
    118	.acpi = {
    119		.set_root_pointer	= x86_default_set_root_pointer,
    120		.get_root_pointer	= x86_default_get_root_pointer,
    121		.reduced_hw_early_init	= acpi_generic_reduced_hw_init,
    122	},
    123};
    124
    125struct x86_cpuinit_ops x86_cpuinit = {
    126	.early_percpu_clock_init	= x86_init_noop,
    127	.setup_percpu_clockev		= setup_secondary_APIC_clock,
    128};
    129
    130static void default_nmi_init(void) { };
    131
    132static void enc_status_change_prepare_noop(unsigned long vaddr, int npages, bool enc) { }
    133static bool enc_status_change_finish_noop(unsigned long vaddr, int npages, bool enc) { return false; }
    134static bool enc_tlb_flush_required_noop(bool enc) { return false; }
    135static bool enc_cache_flush_required_noop(void) { return false; }
    136
    137struct x86_platform_ops x86_platform __ro_after_init = {
    138	.calibrate_cpu			= native_calibrate_cpu_early,
    139	.calibrate_tsc			= native_calibrate_tsc,
    140	.get_wallclock			= mach_get_cmos_time,
    141	.set_wallclock			= mach_set_rtc_mmss,
    142	.iommu_shutdown			= iommu_shutdown_noop,
    143	.is_untracked_pat_range		= is_ISA_range,
    144	.nmi_init			= default_nmi_init,
    145	.get_nmi_reason			= default_get_nmi_reason,
    146	.save_sched_clock_state		= tsc_save_sched_clock_state,
    147	.restore_sched_clock_state	= tsc_restore_sched_clock_state,
    148	.hyper.pin_vcpu			= x86_op_int_noop,
    149
    150	.guest = {
    151		.enc_status_change_prepare = enc_status_change_prepare_noop,
    152		.enc_status_change_finish  = enc_status_change_finish_noop,
    153		.enc_tlb_flush_required	   = enc_tlb_flush_required_noop,
    154		.enc_cache_flush_required  = enc_cache_flush_required_noop,
    155	},
    156};
    157
    158EXPORT_SYMBOL_GPL(x86_platform);
    159
    160struct x86_apic_ops x86_apic_ops __ro_after_init = {
    161	.io_apic_read	= native_io_apic_read,
    162	.restore	= native_restore_boot_irq_mode,
    163};