v4.19.13 snapshot.
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
new file mode 100644
index 0000000..2792b55
--- /dev/null
+++ b/arch/x86/kernel/x86_init.c
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2009 Thomas Gleixner <tglx@linutronix.de>
+ *
+ * For licencing details see kernel-base/COPYING
+ */
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/export.h>
+#include <linux/pci.h>
+
+#include <asm/acpi.h>
+#include <asm/bios_ebda.h>
+#include <asm/paravirt.h>
+#include <asm/pci_x86.h>
+#include <asm/mpspec.h>
+#include <asm/setup.h>
+#include <asm/apic.h>
+#include <asm/e820/api.h>
+#include <asm/time.h>
+#include <asm/irq.h>
+#include <asm/io_apic.h>
+#include <asm/hpet.h>
+#include <asm/pat.h>
+#include <asm/tsc.h>
+#include <asm/iommu.h>
+#include <asm/mach_traps.h>
+
+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) { }
+static bool __init bool_x86_init_noop(void) { return false; }
+static void x86_op_int_noop(int cpu) { }
+static u64 u64_x86_init_noop(void) { return 0; }
+
+/*
+ * 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 = {
+ .mpc_record = x86_init_uint_noop,
+ .setup_ioapic_ids = x86_init_noop,
+ .mpc_apic_id = default_mpc_apic_id,
+ .smp_read_mpc_oem = default_smp_read_mpc_oem,
+ .mpc_oem_bus_info = default_mpc_oem_bus_info,
+ .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,
+ .trap_init = x86_init_noop,
+ .intr_mode_init = apic_intr_mode_init
+ },
+
+ .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_init_noop,
+ },
+
+ .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,
+ .init_mem_mapping = x86_init_noop,
+ .init_after_bootmem = x86_init_noop,
+ },
+
+ .acpi = {
+ .get_root_pointer = u64_x86_init_noop,
+ .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) { };
+
+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_rtc_mmss,
+ .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,
+ .hyper.pin_vcpu = x86_op_int_noop,
+};
+
+EXPORT_SYMBOL_GPL(x86_platform);
+
+#if defined(CONFIG_PCI_MSI)
+struct x86_msi_ops x86_msi __ro_after_init = {
+ .setup_msi_irqs = native_setup_msi_irqs,
+ .teardown_msi_irq = native_teardown_msi_irq,
+ .teardown_msi_irqs = default_teardown_msi_irqs,
+ .restore_msi_irqs = default_restore_msi_irqs,
+};
+
+/* MSI arch specific hooks */
+int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
+{
+ return x86_msi.setup_msi_irqs(dev, nvec, type);
+}
+
+void arch_teardown_msi_irqs(struct pci_dev *dev)
+{
+ x86_msi.teardown_msi_irqs(dev);
+}
+
+void arch_teardown_msi_irq(unsigned int irq)
+{
+ x86_msi.teardown_msi_irq(irq);
+}
+
+void arch_restore_msi_irqs(struct pci_dev *dev)
+{
+ x86_msi.restore_msi_irqs(dev);
+}
+#endif
+
+struct x86_apic_ops x86_apic_ops __ro_after_init = {
+ .io_apic_read = native_io_apic_read,
+ .restore = native_restore_boot_irq_mode,
+};