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
disable_acpi(void)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
acpi_noirq_set(void)59 static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
acpi_disable_pci(void)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
acpi_skip_set_wakeup_address(void)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 */
acpi_processor_cstate_check(unsigned int max_cstate)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
arch_has_acpi_pdc(void)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
arch_acpi_set_proc_cap_bits(u32 * cap)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
acpi_has_cpu_in_madt(void)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
acpi_arch_set_root_pointer(u64 addr)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
acpi_arch_get_root_pointer(void)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 #else /* !CONFIG_ACPI */
169
170 #define acpi_lapic 0
171 #define acpi_ioapic 0
172 #define acpi_disable_cmcff 0
acpi_noirq_set(void)173 static inline void acpi_noirq_set(void) { }
acpi_disable_pci(void)174 static inline void acpi_disable_pci(void) { }
disable_acpi(void)175 static inline void disable_acpi(void) { }
176
acpi_generic_reduced_hw_init(void)177 static inline void acpi_generic_reduced_hw_init(void) { }
178
x86_default_set_root_pointer(u64 addr)179 static inline void x86_default_set_root_pointer(u64 addr) { }
180
x86_default_get_root_pointer(void)181 static inline u64 x86_default_get_root_pointer(void)
182 {
183 return 0;
184 }
185
186 #endif /* !CONFIG_ACPI */
187
188 #define ARCH_HAS_POWER_INIT 1
189
190 #ifdef CONFIG_ACPI_NUMA
191 extern int x86_acpi_numa_init(void);
192 #endif /* CONFIG_ACPI_NUMA */
193
194 struct cper_ia_proc_ctx;
195
196 #ifdef CONFIG_ACPI_APEI
arch_apei_get_mem_attribute(phys_addr_t addr)197 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
198 {
199 /*
200 * We currently have no way to look up the EFI memory map
201 * attributes for a region in a consistent way, because the
202 * memmap is discarded after efi_free_boot_services(). So if
203 * you call efi_mem_attributes() during boot and at runtime,
204 * you could theoretically see different attributes.
205 *
206 * We are yet to see any x86 platforms that require anything
207 * other than PAGE_KERNEL (some ARM64 platforms require the
208 * equivalent of PAGE_KERNEL_NOCACHE). Additionally, if SME
209 * is active, the ACPI information will not be encrypted,
210 * so return PAGE_KERNEL_NOENC until we know differently.
211 */
212 return PAGE_KERNEL_NOENC;
213 }
214
215 int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
216 u64 lapic_id);
217 #else
arch_apei_report_x86_error(struct cper_ia_proc_ctx * ctx_info,u64 lapic_id)218 static inline int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
219 u64 lapic_id)
220 {
221 return -EINVAL;
222 }
223 #endif
224
225 #define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT)
226
227 #endif /* _ASM_X86_ACPI_H */
228