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 static inline void acpi_noirq_set(void) { acpi_noirq = 1; } 60 static inline void acpi_disable_pci(void) 61 { 62 acpi_pci_disabled = 1; 63 acpi_noirq_set(); 64 } 65 66 /* Low-level suspend routine. */ 67 extern int (*acpi_suspend_lowlevel)(void); 68 69 /* Physical address to resume after wakeup */ 70 unsigned long acpi_get_wakeup_address(void); 71 72 static inline bool acpi_skip_set_wakeup_address(void) 73 { 74 return cpu_feature_enabled(X86_FEATURE_XENPV); 75 } 76 77 #define acpi_skip_set_wakeup_address acpi_skip_set_wakeup_address 78 79 /* 80 * Check if the CPU can handle C2 and deeper 81 */ 82 static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate) 83 { 84 /* 85 * Early models (<=5) of AMD Opterons are not supposed to go into 86 * C2 state. 87 * 88 * Steppings 0x0A and later are good 89 */ 90 if (boot_cpu_data.x86 == 0x0F && 91 boot_cpu_data.x86_vendor == X86_VENDOR_AMD && 92 boot_cpu_data.x86_model <= 0x05 && 93 boot_cpu_data.x86_stepping < 0x0A) 94 return 1; 95 else if (boot_cpu_has(X86_BUG_AMD_APIC_C1E)) 96 return 1; 97 else 98 return max_cstate; 99 } 100 101 static inline bool arch_has_acpi_pdc(void) 102 { 103 struct cpuinfo_x86 *c = &cpu_data(0); 104 return (c->x86_vendor == X86_VENDOR_INTEL || 105 c->x86_vendor == X86_VENDOR_CENTAUR); 106 } 107 108 static inline void arch_acpi_set_proc_cap_bits(u32 *cap) 109 { 110 struct cpuinfo_x86 *c = &cpu_data(0); 111 112 *cap |= ACPI_PROC_CAP_C_CAPABILITY_SMP; 113 114 /* Enable coordination with firmware's _TSD info */ 115 *cap |= ACPI_PROC_CAP_SMP_T_SWCOORD; 116 117 if (cpu_has(c, X86_FEATURE_EST)) 118 *cap |= ACPI_PROC_CAP_EST_CAPABILITY_SWSMP; 119 120 if (cpu_has(c, X86_FEATURE_ACPI)) 121 *cap |= ACPI_PROC_CAP_T_FFH; 122 123 if (cpu_has(c, X86_FEATURE_HWP)) 124 *cap |= ACPI_PROC_CAP_COLLAB_PROC_PERF; 125 126 /* 127 * If mwait/monitor is unsupported, C_C1_FFH and 128 * C2/C3_FFH will be disabled. 129 */ 130 if (!cpu_has(c, X86_FEATURE_MWAIT) || 131 boot_option_idle_override == IDLE_NOMWAIT) 132 *cap &= ~(ACPI_PROC_CAP_C_C1_FFH | ACPI_PROC_CAP_C_C2C3_FFH); 133 134 if (xen_initial_domain()) { 135 /* 136 * When Linux is running as Xen dom0, the hypervisor is the 137 * entity in charge of the processor power management, and so 138 * Xen needs to check the OS capabilities reported in the 139 * processor capabilities buffer matches what the hypervisor 140 * driver supports. 141 */ 142 xen_sanitize_proc_cap_bits(cap); 143 } 144 } 145 146 static inline bool acpi_has_cpu_in_madt(void) 147 { 148 return !!acpi_lapic; 149 } 150 151 #define ACPI_HAVE_ARCH_SET_ROOT_POINTER 152 static inline void acpi_arch_set_root_pointer(u64 addr) 153 { 154 x86_init.acpi.set_root_pointer(addr); 155 } 156 157 #define ACPI_HAVE_ARCH_GET_ROOT_POINTER 158 static inline u64 acpi_arch_get_root_pointer(void) 159 { 160 return x86_init.acpi.get_root_pointer(); 161 } 162 163 void acpi_generic_reduced_hw_init(void); 164 165 void x86_default_set_root_pointer(u64 addr); 166 u64 x86_default_get_root_pointer(void); 167 168 #ifdef CONFIG_XEN_PV 169 /* A Xen PV domain needs a special acpi_os_ioremap() handling. */ 170 extern void __iomem * (*acpi_os_ioremap)(acpi_physical_address phys, 171 acpi_size size); 172 void __iomem *x86_acpi_os_ioremap(acpi_physical_address phys, acpi_size size); 173 #define acpi_os_ioremap acpi_os_ioremap 174 #endif 175 176 #else /* !CONFIG_ACPI */ 177 178 #define acpi_lapic 0 179 #define acpi_ioapic 0 180 #define acpi_disable_cmcff 0 181 static inline void acpi_noirq_set(void) { } 182 static inline void acpi_disable_pci(void) { } 183 static inline void disable_acpi(void) { } 184 185 static inline void acpi_generic_reduced_hw_init(void) { } 186 187 static inline void x86_default_set_root_pointer(u64 addr) { } 188 189 static inline u64 x86_default_get_root_pointer(void) 190 { 191 return 0; 192 } 193 194 #endif /* !CONFIG_ACPI */ 195 196 #define ARCH_HAS_POWER_INIT 1 197 198 #ifdef CONFIG_ACPI_NUMA 199 extern int x86_acpi_numa_init(void); 200 #endif /* CONFIG_ACPI_NUMA */ 201 202 struct cper_ia_proc_ctx; 203 204 #ifdef CONFIG_ACPI_APEI 205 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr) 206 { 207 /* 208 * We currently have no way to look up the EFI memory map 209 * attributes for a region in a consistent way, because the 210 * memmap is discarded after efi_free_boot_services(). So if 211 * you call efi_mem_attributes() during boot and at runtime, 212 * you could theoretically see different attributes. 213 * 214 * We are yet to see any x86 platforms that require anything 215 * other than PAGE_KERNEL (some ARM64 platforms require the 216 * equivalent of PAGE_KERNEL_NOCACHE). Additionally, if SME 217 * is active, the ACPI information will not be encrypted, 218 * so return PAGE_KERNEL_NOENC until we know differently. 219 */ 220 return PAGE_KERNEL_NOENC; 221 } 222 223 int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info, 224 u64 lapic_id); 225 #else 226 static inline int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info, 227 u64 lapic_id) 228 { 229 return -EINVAL; 230 } 231 #endif 232 233 #define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT) 234 235 #endif /* _ASM_X86_ACPI_H */ 236