1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2#ifndef _ASM_X86_ACPI_H 3#define _ASM_X86_ACPI_H 4 5/* 6 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 7 * Copyright (C) 2001 Patrick Mochel <mochel@osdl.org> 8 */ 9#include <acpi/proc_cap_intel.h> 10 11#include <asm/numa.h> 12#include <asm/fixmap.h> 13#include <asm/processor.h> 14#include <asm/mmu.h> 15#include <asm/mpspec.h> 16#include <asm/x86_init.h> 17#include <asm/cpufeature.h> 18#include <asm/irq_vectors.h> 19#include <asm/xen/hypervisor.h> 20 21#include <xen/xen.h> 22 23#ifdef CONFIG_ACPI_APEI 24# include <asm/pgtable_types.h> 25#endif 26 27#ifdef CONFIG_ACPI 28extern int acpi_lapic; 29extern int acpi_ioapic; 30extern int acpi_noirq; 31extern int acpi_strict; 32extern int acpi_disabled; 33extern int acpi_pci_disabled; 34extern int acpi_skip_timer_override; 35extern int acpi_use_timer_override; 36extern int acpi_fix_pin2_polarity; 37extern int acpi_disable_cmcff; 38extern bool acpi_int_src_ovr[NR_IRQS_LEGACY]; 39 40extern u8 acpi_sci_flags; 41extern u32 acpi_sci_override_gsi; 42void acpi_pic_sci_set_trigger(unsigned int, u16); 43 44struct device; 45 46extern int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 47 int trigger, int polarity); 48extern void (*__acpi_unregister_gsi)(u32 gsi); 49 50static inline void disable_acpi(void) 51{ 52 acpi_disabled = 1; 53 acpi_pci_disabled = 1; 54 acpi_noirq = 1; 55} 56 57extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq); 58 59extern int acpi_blacklisted(void); 60 61static inline void acpi_noirq_set(void) { acpi_noirq = 1; } 62static inline void acpi_disable_pci(void) 63{ 64 acpi_pci_disabled = 1; 65 acpi_noirq_set(); 66} 67 68/* Low-level suspend routine. */ 69extern int (*acpi_suspend_lowlevel)(void); 70 71/* Physical address to resume after wakeup */ 72unsigned long acpi_get_wakeup_address(void); 73 74static inline bool acpi_skip_set_wakeup_address(void) 75{ 76 return cpu_feature_enabled(X86_FEATURE_XENPV); 77} 78 79#define acpi_skip_set_wakeup_address acpi_skip_set_wakeup_address 80 81/* 82 * Check if the CPU can handle C2 and deeper 83 */ 84static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate) 85{ 86 /* 87 * Early models (<=5) of AMD Opterons are not supposed to go into 88 * C2 state. 89 * 90 * Steppings 0x0A and later are good 91 */ 92 if (boot_cpu_data.x86 == 0x0F && 93 boot_cpu_data.x86_vendor == X86_VENDOR_AMD && 94 boot_cpu_data.x86_model <= 0x05 && 95 boot_cpu_data.x86_stepping < 0x0A) 96 return 1; 97 else if (boot_cpu_has(X86_BUG_AMD_APIC_C1E)) 98 return 1; 99 else 100 return max_cstate; 101} 102 103static inline bool arch_has_acpi_pdc(void) 104{ 105 struct cpuinfo_x86 *c = &cpu_data(0); 106 return (c->x86_vendor == X86_VENDOR_INTEL || 107 c->x86_vendor == X86_VENDOR_CENTAUR); 108} 109 110static inline void arch_acpi_set_proc_cap_bits(u32 *cap) 111{ 112 struct cpuinfo_x86 *c = &cpu_data(0); 113 114 *cap |= ACPI_PROC_CAP_C_CAPABILITY_SMP; 115 116 /* Enable coordination with firmware's _TSD info */ 117 *cap |= ACPI_PROC_CAP_SMP_T_SWCOORD; 118 119 if (cpu_has(c, X86_FEATURE_EST)) 120 *cap |= ACPI_PROC_CAP_EST_CAPABILITY_SWSMP; 121 122 if (cpu_has(c, X86_FEATURE_ACPI)) 123 *cap |= ACPI_PROC_CAP_T_FFH; 124 125 if (cpu_has(c, X86_FEATURE_HWP)) 126 *cap |= ACPI_PROC_CAP_COLLAB_PROC_PERF; 127 128 /* 129 * If mwait/monitor is unsupported, C_C1_FFH and 130 * C2/C3_FFH will be disabled. 131 */ 132 if (!cpu_has(c, X86_FEATURE_MWAIT) || 133 boot_option_idle_override == IDLE_NOMWAIT) 134 *cap &= ~(ACPI_PROC_CAP_C_C1_FFH | ACPI_PROC_CAP_C_C2C3_FFH); 135 136 if (xen_initial_domain()) { 137 /* 138 * When Linux is running as Xen dom0, the hypervisor is the 139 * entity in charge of the processor power management, and so 140 * Xen needs to check the OS capabilities reported in the 141 * processor capabilities buffer matches what the hypervisor 142 * driver supports. 143 */ 144 xen_sanitize_proc_cap_bits(cap); 145 } 146} 147 148static inline bool acpi_has_cpu_in_madt(void) 149{ 150 return !!acpi_lapic; 151} 152 153#define ACPI_HAVE_ARCH_SET_ROOT_POINTER 154static inline void acpi_arch_set_root_pointer(u64 addr) 155{ 156 x86_init.acpi.set_root_pointer(addr); 157} 158 159#define ACPI_HAVE_ARCH_GET_ROOT_POINTER 160static inline u64 acpi_arch_get_root_pointer(void) 161{ 162 return x86_init.acpi.get_root_pointer(); 163} 164 165void acpi_generic_reduced_hw_init(void); 166 167void x86_default_set_root_pointer(u64 addr); 168u64 x86_default_get_root_pointer(void); 169 170#else /* !CONFIG_ACPI */ 171 172#define acpi_lapic 0 173#define acpi_ioapic 0 174#define acpi_disable_cmcff 0 175static inline void acpi_noirq_set(void) { } 176static inline void acpi_disable_pci(void) { } 177static inline void disable_acpi(void) { } 178 179static inline void acpi_generic_reduced_hw_init(void) { } 180 181static inline void x86_default_set_root_pointer(u64 addr) { } 182 183static inline u64 x86_default_get_root_pointer(void) 184{ 185 return 0; 186} 187 188#endif /* !CONFIG_ACPI */ 189 190#define ARCH_HAS_POWER_INIT 1 191 192#ifdef CONFIG_ACPI_NUMA 193extern int x86_acpi_numa_init(void); 194#endif /* CONFIG_ACPI_NUMA */ 195 196struct cper_ia_proc_ctx; 197 198#ifdef CONFIG_ACPI_APEI 199static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr) 200{ 201 /* 202 * We currently have no way to look up the EFI memory map 203 * attributes for a region in a consistent way, because the 204 * memmap is discarded after efi_free_boot_services(). So if 205 * you call efi_mem_attributes() during boot and at runtime, 206 * you could theoretically see different attributes. 207 * 208 * We are yet to see any x86 platforms that require anything 209 * other than PAGE_KERNEL (some ARM64 platforms require the 210 * equivalent of PAGE_KERNEL_NOCACHE). Additionally, if SME 211 * is active, the ACPI information will not be encrypted, 212 * so return PAGE_KERNEL_NOENC until we know differently. 213 */ 214 return PAGE_KERNEL_NOENC; 215} 216 217int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info, 218 u64 lapic_id); 219#else 220static inline int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info, 221 u64 lapic_id) 222{ 223 return -EINVAL; 224} 225#endif 226 227#define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT) 228 229#endif /* _ASM_X86_ACPI_H */ 230