xref: /linux/arch/x86/include/asm/acpi.h (revision b58b13f156c00c2457035b7071eaaac105fe6836)
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 #else /* !CONFIG_ACPI */
169 
170 #define acpi_lapic 0
171 #define acpi_ioapic 0
172 #define acpi_disable_cmcff 0
173 static inline void acpi_noirq_set(void) { }
174 static inline void acpi_disable_pci(void) { }
175 static inline void disable_acpi(void) { }
176 
177 static inline void acpi_generic_reduced_hw_init(void) { }
178 
179 static inline void x86_default_set_root_pointer(u64 addr) { }
180 
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
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
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