331 lines
11 KiB
C
331 lines
11 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_PLATFORM_H
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#define _ASM_X86_PLATFORM_H
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#include <asm/bootparam.h>
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struct ghcb;
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struct mpc_bus;
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struct mpc_cpu;
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struct pt_regs;
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struct mpc_table;
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struct cpuinfo_x86;
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struct irq_domain;
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/**
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* struct x86_init_mpparse - platform specific mpparse ops
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* @setup_ioapic_ids: platform specific ioapic id override
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* @find_smp_config: find the smp configuration
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* @get_smp_config: get the smp configuration
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*/
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struct x86_init_mpparse {
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void (*setup_ioapic_ids)(void);
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void (*find_smp_config)(void);
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void (*get_smp_config)(unsigned int early);
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};
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/**
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* struct x86_init_resources - platform specific resource related ops
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* @probe_roms: probe BIOS roms
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* @reserve_resources: reserve the standard resources for the
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* platform
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* @memory_setup: platform specific memory setup
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*
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*/
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struct x86_init_resources {
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void (*probe_roms)(void);
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void (*reserve_resources)(void);
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char *(*memory_setup)(void);
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};
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/**
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* struct x86_init_irqs - platform specific interrupt setup
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* @pre_vector_init: init code to run before interrupt vectors
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* are set up.
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* @intr_init: interrupt init code
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* @intr_mode_select: interrupt delivery mode selection
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* @intr_mode_init: interrupt delivery mode setup
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* @create_pci_msi_domain: Create the PCI/MSI interrupt domain
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*/
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struct x86_init_irqs {
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void (*pre_vector_init)(void);
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void (*intr_init)(void);
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void (*intr_mode_select)(void);
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void (*intr_mode_init)(void);
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struct irq_domain *(*create_pci_msi_domain)(void);
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};
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/**
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* struct x86_init_oem - oem platform specific customizing functions
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* @arch_setup: platform specific architecture setup
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* @banner: print a platform specific banner
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*/
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struct x86_init_oem {
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void (*arch_setup)(void);
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void (*banner)(void);
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};
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/**
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* struct x86_init_paging - platform specific paging functions
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* @pagetable_init: platform specific paging initialization call to setup
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* the kernel pagetables and prepare accessors functions.
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* Callback must call paging_init(). Called once after the
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* direct mapping for phys memory is available.
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*/
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struct x86_init_paging {
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void (*pagetable_init)(void);
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};
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/**
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* struct x86_init_timers - platform specific timer setup
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* @setup_perpcu_clockev: set up the per cpu clock event device for the
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* boot cpu
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* @timer_init: initialize the platform timer (default PIT/HPET)
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* @wallclock_init: init the wallclock device
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*/
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struct x86_init_timers {
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void (*setup_percpu_clockev)(void);
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void (*timer_init)(void);
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void (*wallclock_init)(void);
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};
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/**
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* struct x86_init_iommu - platform specific iommu setup
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* @iommu_init: platform specific iommu setup
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*/
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struct x86_init_iommu {
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int (*iommu_init)(void);
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};
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/**
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* struct x86_init_pci - platform specific pci init functions
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* @arch_init: platform specific pci arch init call
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* @init: platform specific pci subsystem init
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* @init_irq: platform specific pci irq init
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* @fixup_irqs: platform specific pci irq fixup
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*/
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struct x86_init_pci {
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int (*arch_init)(void);
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int (*init)(void);
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void (*init_irq)(void);
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void (*fixup_irqs)(void);
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};
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/**
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* struct x86_hyper_init - x86 hypervisor init functions
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* @init_platform: platform setup
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* @guest_late_init: guest late init
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* @x2apic_available: X2APIC detection
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* @msi_ext_dest_id: MSI supports 15-bit APIC IDs
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* @init_mem_mapping: setup early mappings during init_mem_mapping()
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* @init_after_bootmem: guest init after boot allocator is finished
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*/
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struct x86_hyper_init {
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void (*init_platform)(void);
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void (*guest_late_init)(void);
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bool (*x2apic_available)(void);
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bool (*msi_ext_dest_id)(void);
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void (*init_mem_mapping)(void);
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void (*init_after_bootmem)(void);
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};
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/**
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* struct x86_init_acpi - x86 ACPI init functions
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* @set_root_poitner: set RSDP address
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* @get_root_pointer: get RSDP address
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* @reduced_hw_early_init: hardware reduced platform early init
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*/
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struct x86_init_acpi {
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void (*set_root_pointer)(u64 addr);
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u64 (*get_root_pointer)(void);
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void (*reduced_hw_early_init)(void);
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};
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/**
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* struct x86_guest - Functions used by misc guest incarnations like SEV, TDX, etc.
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*
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* @enc_status_change_prepare Notify HV before the encryption status of a range is changed
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* @enc_status_change_finish Notify HV after the encryption status of a range is changed
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* @enc_tlb_flush_required Returns true if a TLB flush is needed before changing page encryption status
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* @enc_cache_flush_required Returns true if a cache flush is needed before changing page encryption status
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*/
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struct x86_guest {
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bool (*enc_status_change_prepare)(unsigned long vaddr, int npages, bool enc);
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bool (*enc_status_change_finish)(unsigned long vaddr, int npages, bool enc);
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bool (*enc_tlb_flush_required)(bool enc);
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bool (*enc_cache_flush_required)(void);
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};
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/**
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* struct x86_init_ops - functions for platform specific setup
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*
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*/
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struct x86_init_ops {
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struct x86_init_resources resources;
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struct x86_init_mpparse mpparse;
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struct x86_init_irqs irqs;
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struct x86_init_oem oem;
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struct x86_init_paging paging;
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struct x86_init_timers timers;
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struct x86_init_iommu iommu;
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struct x86_init_pci pci;
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struct x86_hyper_init hyper;
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struct x86_init_acpi acpi;
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};
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/**
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* struct x86_cpuinit_ops - platform specific cpu hotplug setups
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* @setup_percpu_clockev: set up the per cpu clock event device
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* @early_percpu_clock_init: early init of the per cpu clock event device
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*/
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struct x86_cpuinit_ops {
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void (*setup_percpu_clockev)(void);
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void (*early_percpu_clock_init)(void);
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void (*fixup_cpu_id)(struct cpuinfo_x86 *c, int node);
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};
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struct timespec64;
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/**
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* struct x86_legacy_devices - legacy x86 devices
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*
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* @pnpbios: this platform can have a PNPBIOS. If this is disabled the platform
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* is known to never have a PNPBIOS.
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*
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* These are devices known to require LPC or ISA bus. The definition of legacy
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* devices adheres to the ACPI 5.2.9.3 IA-PC Boot Architecture flag
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* ACPI_FADT_LEGACY_DEVICES. These devices consist of user visible devices on
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* the LPC or ISA bus. User visible devices are devices that have end-user
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* accessible connectors (for example, LPT parallel port). Legacy devices on
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* the LPC bus consist for example of serial and parallel ports, PS/2 keyboard
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* / mouse, and the floppy disk controller. A system that lacks all known
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* legacy devices can assume all devices can be detected exclusively via
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* standard device enumeration mechanisms including the ACPI namespace.
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*
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* A system which has does not have ACPI_FADT_LEGACY_DEVICES enabled must not
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* have any of the legacy devices enumerated below present.
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*/
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struct x86_legacy_devices {
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int pnpbios;
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};
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/**
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* enum x86_legacy_i8042_state - i8042 keyboard controller state
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* @X86_LEGACY_I8042_PLATFORM_ABSENT: the controller is always absent on
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* given platform/subarch.
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* @X86_LEGACY_I8042_FIRMWARE_ABSENT: firmware reports that the controller
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* is absent.
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* @X86_LEGACY_i8042_EXPECTED_PRESENT: the controller is likely to be
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* present, the i8042 driver should probe for controller existence.
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*/
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enum x86_legacy_i8042_state {
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X86_LEGACY_I8042_PLATFORM_ABSENT,
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X86_LEGACY_I8042_FIRMWARE_ABSENT,
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X86_LEGACY_I8042_EXPECTED_PRESENT,
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};
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/**
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* struct x86_legacy_features - legacy x86 features
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*
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* @i8042: indicated if we expect the device to have i8042 controller
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* present.
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* @rtc: this device has a CMOS real-time clock present
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* @reserve_bios_regions: boot code will search for the EBDA address and the
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* start of the 640k - 1M BIOS region. If false, the platform must
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* ensure that its memory map correctly reserves sub-1MB regions as needed.
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* @devices: legacy x86 devices, refer to struct x86_legacy_devices
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* documentation for further details.
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*/
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struct x86_legacy_features {
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enum x86_legacy_i8042_state i8042;
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int rtc;
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int warm_reset;
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int no_vga;
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int reserve_bios_regions;
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struct x86_legacy_devices devices;
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};
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/**
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* struct x86_hyper_runtime - x86 hypervisor specific runtime callbacks
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*
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* @pin_vcpu: pin current vcpu to specified physical
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* cpu (run rarely)
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* @sev_es_hcall_prepare: Load additional hypervisor-specific
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* state into the GHCB when doing a VMMCALL under
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* SEV-ES. Called from the #VC exception handler.
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* @sev_es_hcall_finish: Copies state from the GHCB back into the
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* processor (or pt_regs). Also runs checks on the
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* state returned from the hypervisor after a
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* VMMCALL under SEV-ES. Needs to return 'false'
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* if the checks fail. Called from the #VC
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* exception handler.
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*/
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struct x86_hyper_runtime {
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void (*pin_vcpu)(int cpu);
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void (*sev_es_hcall_prepare)(struct ghcb *ghcb, struct pt_regs *regs);
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bool (*sev_es_hcall_finish)(struct ghcb *ghcb, struct pt_regs *regs);
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};
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/**
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* struct x86_platform_ops - platform specific runtime functions
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* @calibrate_cpu: calibrate CPU
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* @calibrate_tsc: calibrate TSC, if different from CPU
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* @get_wallclock: get time from HW clock like RTC etc.
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* @set_wallclock: set time back to HW clock
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* @is_untracked_pat_range exclude from PAT logic
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* @nmi_init enable NMI on cpus
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* @save_sched_clock_state: save state for sched_clock() on suspend
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* @restore_sched_clock_state: restore state for sched_clock() on resume
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* @apic_post_init: adjust apic if needed
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* @legacy: legacy features
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* @set_legacy_features: override legacy features. Use of this callback
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* is highly discouraged. You should only need
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* this if your hardware platform requires further
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* custom fine tuning far beyond what may be
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* possible in x86_early_init_platform_quirks() by
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* only using the current x86_hardware_subarch
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* semantics.
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* @realmode_reserve: reserve memory for realmode trampoline
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* @realmode_init: initialize realmode trampoline
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* @hyper: x86 hypervisor specific runtime callbacks
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*/
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struct x86_platform_ops {
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unsigned long (*calibrate_cpu)(void);
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unsigned long (*calibrate_tsc)(void);
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void (*get_wallclock)(struct timespec64 *ts);
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int (*set_wallclock)(const struct timespec64 *ts);
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void (*iommu_shutdown)(void);
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bool (*is_untracked_pat_range)(u64 start, u64 end);
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void (*nmi_init)(void);
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unsigned char (*get_nmi_reason)(void);
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void (*save_sched_clock_state)(void);
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void (*restore_sched_clock_state)(void);
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void (*apic_post_init)(void);
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struct x86_legacy_features legacy;
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void (*set_legacy_features)(void);
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void (*realmode_reserve)(void);
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void (*realmode_init)(void);
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struct x86_hyper_runtime hyper;
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struct x86_guest guest;
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};
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struct x86_apic_ops {
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unsigned int (*io_apic_read) (unsigned int apic, unsigned int reg);
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void (*restore)(void);
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};
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extern struct x86_init_ops x86_init;
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extern struct x86_cpuinit_ops x86_cpuinit;
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extern struct x86_platform_ops x86_platform;
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extern struct x86_msi_ops x86_msi;
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extern struct x86_apic_ops x86_apic_ops;
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extern void x86_early_init_platform_quirks(void);
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extern void x86_init_noop(void);
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extern void x86_init_uint_noop(unsigned int unused);
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extern bool bool_x86_init_noop(void);
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extern void x86_op_int_noop(int cpu);
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extern bool x86_pnpbios_disabled(void);
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#endif
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