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
81union acpi_subtable_headers;
82
83int __init acpi_parse_mp_wake(union acpi_subtable_headers *header,
84 const unsigned long end);
85
86void asm_acpi_mp_play_dead(u64 reset_vector, u64 pgd_pa);
87
88/*
89 * Check if the CPU can handle C2 and deeper
90 */
91static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
92{
93 /*
94 * Early models (<=5) of AMD Opterons are not supposed to go into
95 * C2 state.
96 *
97 * Steppings 0x0A and later are good
98 */
99 if (boot_cpu_data.x86 == 0x0F &&
100 boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
101 boot_cpu_data.x86_model <= 0x05 &&
102 boot_cpu_data.x86_stepping < 0x0A)
103 return 1;
104 else if (boot_cpu_has(X86_BUG_AMD_APIC_C1E))
105 return 1;
106 else
107 return max_cstate;
108}
109
110static inline bool arch_has_acpi_pdc(void)
111{
112 struct cpuinfo_x86 *c = &cpu_data(0);
113 return (c->x86_vendor == X86_VENDOR_INTEL ||
114 c->x86_vendor == X86_VENDOR_CENTAUR);
115}
116
117static inline void arch_acpi_set_proc_cap_bits(u32 *cap)
118{
119 struct cpuinfo_x86 *c = &cpu_data(0);
120
121 *cap |= ACPI_PROC_CAP_C_CAPABILITY_SMP;
122
123 /* Enable coordination with firmware's _TSD info */
124 *cap |= ACPI_PROC_CAP_SMP_T_SWCOORD;
125
126 if (cpu_has(c, X86_FEATURE_EST))
127 *cap |= ACPI_PROC_CAP_EST_CAPABILITY_SWSMP;
128
129 if (cpu_has(c, X86_FEATURE_ACPI))
130 *cap |= ACPI_PROC_CAP_T_FFH;
131
132 if (cpu_has(c, X86_FEATURE_HWP))
133 *cap |= ACPI_PROC_CAP_COLLAB_PROC_PERF;
134
135 /*
136 * If mwait/monitor is unsupported, C_C1_FFH and
137 * C2/C3_FFH will be disabled.
138 */
139 if (!cpu_has(c, X86_FEATURE_MWAIT) ||
140 boot_option_idle_override == IDLE_NOMWAIT)
141 *cap &= ~(ACPI_PROC_CAP_C_C1_FFH | ACPI_PROC_CAP_C_C2C3_FFH);
142
143 if (xen_initial_domain()) {
144 /*
145 * When Linux is running as Xen dom0, the hypervisor is the
146 * entity in charge of the processor power management, and so
147 * Xen needs to check the OS capabilities reported in the
148 * processor capabilities buffer matches what the hypervisor
149 * driver supports.
150 */
151 xen_sanitize_proc_cap_bits(buf: cap);
152 }
153}
154
155static inline bool acpi_has_cpu_in_madt(void)
156{
157 return !!acpi_lapic;
158}
159
160#define ACPI_HAVE_ARCH_SET_ROOT_POINTER
161static __always_inline void acpi_arch_set_root_pointer(u64 addr)
162{
163 x86_init.acpi.set_root_pointer(addr);
164}
165
166#define ACPI_HAVE_ARCH_GET_ROOT_POINTER
167static __always_inline u64 acpi_arch_get_root_pointer(void)
168{
169 return x86_init.acpi.get_root_pointer();
170}
171
172void acpi_generic_reduced_hw_init(void);
173
174void x86_default_set_root_pointer(u64 addr);
175u64 x86_default_get_root_pointer(void);
176
177#ifdef CONFIG_XEN_PV
178/* A Xen PV domain needs a special acpi_os_ioremap() handling. */
179extern void __iomem * (*acpi_os_ioremap)(acpi_physical_address phys,
180 acpi_size size);
181void __iomem *x86_acpi_os_ioremap(acpi_physical_address phys, acpi_size size);
182#define acpi_os_ioremap acpi_os_ioremap
183#endif
184
185#else /* !CONFIG_ACPI */
186
187#define acpi_lapic 0
188#define acpi_ioapic 0
189#define acpi_disable_cmcff 0
190static inline void acpi_noirq_set(void) { }
191static inline void acpi_disable_pci(void) { }
192static inline void disable_acpi(void) { }
193
194static inline void acpi_generic_reduced_hw_init(void) { }
195
196static inline void x86_default_set_root_pointer(u64 addr) { }
197
198static inline u64 x86_default_get_root_pointer(void)
199{
200 return 0;
201}
202
203#endif /* !CONFIG_ACPI */
204
205#define ARCH_HAS_POWER_INIT 1
206
207#ifdef CONFIG_ACPI_NUMA
208extern int x86_acpi_numa_init(void);
209#endif /* CONFIG_ACPI_NUMA */
210
211struct cper_ia_proc_ctx;
212
213#ifdef CONFIG_ACPI_APEI
214static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
215{
216 /*
217 * We currently have no way to look up the EFI memory map
218 * attributes for a region in a consistent way, because the
219 * memmap is discarded after efi_free_boot_services(). So if
220 * you call efi_mem_attributes() during boot and at runtime,
221 * you could theoretically see different attributes.
222 *
223 * We are yet to see any x86 platforms that require anything
224 * other than PAGE_KERNEL (some ARM64 platforms require the
225 * equivalent of PAGE_KERNEL_NOCACHE). Additionally, if SME
226 * is active, the ACPI information will not be encrypted,
227 * so return PAGE_KERNEL_NOENC until we know differently.
228 */
229 return PAGE_KERNEL_NOENC;
230}
231
232int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
233 u64 lapic_id);
234#else
235static inline int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
236 u64 lapic_id)
237{
238 return -EINVAL;
239}
240#endif
241
242#define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT)
243
244#endif /* _ASM_X86_ACPI_H */
245

source code of linux/arch/x86/include/asm/acpi.h