From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/x86/kernel/x86_init.c | 166 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 arch/x86/kernel/x86_init.c (limited to 'arch/x86/kernel/x86_init.c') diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c new file mode 100644 index 000000000..41e5b4cb8 --- /dev/null +++ b/arch/x86/kernel/x86_init.c @@ -0,0 +1,166 @@ +/* + * Copyright (C) 2009 Thomas Gleixner + * + * For licencing details see kernel-base/COPYING + */ +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +void x86_init_noop(void) { } +void __init x86_init_uint_noop(unsigned int unused) { } +static int __init iommu_init_noop(void) { return 0; } +static void iommu_shutdown_noop(void) { } +bool __init bool_x86_init_noop(void) { return false; } +void x86_op_int_noop(int cpu) { } +static int set_rtc_noop(const struct timespec64 *now) { return -EINVAL; } +static void get_rtc_noop(struct timespec64 *now) { } + +static __initconst const struct of_device_id of_cmos_match[] = { + { .compatible = "motorola,mc146818" }, + {} +}; + +/* + * Allow devicetree configured systems to disable the RTC by setting the + * corresponding DT node's status property to disabled. Code is optimized + * out for CONFIG_OF=n builds. + */ +static __init void x86_wallclock_init(void) +{ + struct device_node *node = of_find_matching_node(NULL, of_cmos_match); + + if (node && !of_device_is_available(node)) { + x86_platform.get_wallclock = get_rtc_noop; + x86_platform.set_wallclock = set_rtc_noop; + } +} + +/* + * The platform setup functions are preset with the default functions + * for standard PC hardware. + */ +struct x86_init_ops x86_init __initdata = { + + .resources = { + .probe_roms = probe_roms, + .reserve_resources = reserve_standard_io_resources, + .memory_setup = e820__memory_setup_default, + }, + + .mpparse = { + .setup_ioapic_ids = x86_init_noop, + .find_smp_config = default_find_smp_config, + .get_smp_config = default_get_smp_config, + }, + + .irqs = { + .pre_vector_init = init_ISA_irqs, + .intr_init = native_init_IRQ, + .intr_mode_select = apic_intr_mode_select, + .intr_mode_init = apic_intr_mode_init, + .create_pci_msi_domain = native_create_pci_msi_domain, + }, + + .oem = { + .arch_setup = x86_init_noop, + .banner = default_banner, + }, + + .paging = { + .pagetable_init = native_pagetable_init, + }, + + .timers = { + .setup_percpu_clockev = setup_boot_APIC_clock, + .timer_init = hpet_time_init, + .wallclock_init = x86_wallclock_init, + }, + + .iommu = { + .iommu_init = iommu_init_noop, + }, + + .pci = { + .init = x86_default_pci_init, + .init_irq = x86_default_pci_init_irq, + .fixup_irqs = x86_default_pci_fixup_irqs, + }, + + .hyper = { + .init_platform = x86_init_noop, + .guest_late_init = x86_init_noop, + .x2apic_available = bool_x86_init_noop, + .msi_ext_dest_id = bool_x86_init_noop, + .init_mem_mapping = x86_init_noop, + .init_after_bootmem = x86_init_noop, + }, + + .acpi = { + .set_root_pointer = x86_default_set_root_pointer, + .get_root_pointer = x86_default_get_root_pointer, + .reduced_hw_early_init = acpi_generic_reduced_hw_init, + }, +}; + +struct x86_cpuinit_ops x86_cpuinit = { + .early_percpu_clock_init = x86_init_noop, + .setup_percpu_clockev = setup_secondary_APIC_clock, +}; + +static void default_nmi_init(void) { }; + +static bool enc_status_change_prepare_noop(unsigned long vaddr, int npages, bool enc) { return true; } +static bool enc_status_change_finish_noop(unsigned long vaddr, int npages, bool enc) { return false; } +static bool enc_tlb_flush_required_noop(bool enc) { return false; } +static bool enc_cache_flush_required_noop(void) { return false; } + +struct x86_platform_ops x86_platform __ro_after_init = { + .calibrate_cpu = native_calibrate_cpu_early, + .calibrate_tsc = native_calibrate_tsc, + .get_wallclock = mach_get_cmos_time, + .set_wallclock = mach_set_cmos_time, + .iommu_shutdown = iommu_shutdown_noop, + .is_untracked_pat_range = is_ISA_range, + .nmi_init = default_nmi_init, + .get_nmi_reason = default_get_nmi_reason, + .save_sched_clock_state = tsc_save_sched_clock_state, + .restore_sched_clock_state = tsc_restore_sched_clock_state, + .realmode_reserve = reserve_real_mode, + .realmode_init = init_real_mode, + .hyper.pin_vcpu = x86_op_int_noop, + + .guest = { + .enc_status_change_prepare = enc_status_change_prepare_noop, + .enc_status_change_finish = enc_status_change_finish_noop, + .enc_tlb_flush_required = enc_tlb_flush_required_noop, + .enc_cache_flush_required = enc_cache_flush_required_noop, + }, +}; + +EXPORT_SYMBOL_GPL(x86_platform); + +struct x86_apic_ops x86_apic_ops __ro_after_init = { + .io_apic_read = native_io_apic_read, + .restore = native_restore_boot_irq_mode, +}; -- cgit v1.2.3