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 28 extern int acpi_lapic; 29 extern int acpi_ioapic; 30 extern int acpi_noirq; 31 extern int acpi_strict; 32 extern int acpi_disabled; 33 extern int acpi_pci_disabled; 34 extern int acpi_skip_timer_override; 35 extern int acpi_use_timer_override; 36 extern int acpi_fix_pin2_polarity; 37 extern int acpi_disable_cmcff; 38 extern bool acpi_int_src_ovr[NR_IRQS_LEGACY]; 39 40 extern u8 acpi_sci_flags; 41 extern u32 acpi_sci_override_gsi; 42 void acpi_pic_sci_set_trigger(unsigned int, u16); 43 44 struct device; 45 46 extern int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 47 int trigger, int polarity); 48 extern void (*__acpi_unregister_gsi)(u32 gsi); 49 50 static inline void disable_acpi(void) 51 { 52 acpi_disabled = 1; 53 acpi_pci_disabled = 1; 54 acpi_noirq = 1; 55 } 56 57 extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq); 58 59 extern int acpi_blacklisted(void); 60 61 static inline void acpi_noirq_set(void) { acpi_noirq = 1; } 62 static inline void acpi_disable_pci(void) 63 { 64 acpi_pci_disabled = 1; 65 acpi_noirq_set(); 66 } 67 68 /* Low-level suspend routine. */ 69 extern int (*acpi_suspend_lowlevel)(void); 70 71 /* Physical address to resume after wakeup */ 72 unsigned long acpi_get_wakeup_address(void); 73 74 static 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 */ 84 static 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 } 102 103 static 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 } 109 110 static 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 } 147 148 static inline bool acpi_has_cpu_in_madt(void) 149 { 150 return !!acpi_lapic; 151 } 152 153 #define ACPI_HAVE_ARCH_SET_ROOT_POINTER 154 static 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 160 static inline u64 acpi_arch_get_root_pointer(void) 161 { 162 return x86_init.acpi.get_root_pointer(); 163 } 164 165 void acpi_generic_reduced_hw_init(void); 166 167 void x86_default_set_root_pointer(u64 addr); 168 u64 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 0 175 static inline void acpi_noirq_set(void) { } 176 static inline void acpi_disable_pci(void) { } 177 static inline void disable_acpi(void) { } 178 179 static inline void acpi_generic_reduced_hw_init(void) { } 180 181 static inline void x86_default_set_root_pointer(u64 addr) { } 182 183 static 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 193 extern int x86_acpi_numa_init(void); 194 #endif /* CONFIG_ACPI_NUMA */ 195 196 struct cper_ia_proc_ctx; 197 198 #ifdef CONFIG_ACPI_APEI 199 static 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 } 216 217 int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info, 218 u64 lapic_id); 219 #else 220 static 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