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
59static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
60static inline void acpi_disable_pci(void)
61{
62	acpi_pci_disabled = 1;
63	acpi_noirq_set();
64}
65
66/* Low-level suspend routine. */
67extern int (*acpi_suspend_lowlevel)(void);
68
69/* Physical address to resume after wakeup */
70unsigned long acpi_get_wakeup_address(void);
71
72static 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 */
82static 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
101static 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
108static 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
146static inline bool acpi_has_cpu_in_madt(void)
147{
148	return !!acpi_lapic;
149}
150
151#define ACPI_HAVE_ARCH_SET_ROOT_POINTER
152static 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
158static inline u64 acpi_arch_get_root_pointer(void)
159{
160	return x86_init.acpi.get_root_pointer();
161}
162
163void acpi_generic_reduced_hw_init(void);
164
165void x86_default_set_root_pointer(u64 addr);
166u64 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
173static inline void acpi_noirq_set(void) { }
174static inline void acpi_disable_pci(void) { }
175static inline void disable_acpi(void) { }
176
177static inline void acpi_generic_reduced_hw_init(void) { }
178
179static inline void x86_default_set_root_pointer(u64 addr) { }
180
181static 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
191extern int x86_acpi_numa_init(void);
192#endif /* CONFIG_ACPI_NUMA */
193
194struct cper_ia_proc_ctx;
195
196#ifdef CONFIG_ACPI_APEI
197static 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
215int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
216			       u64 lapic_id);
217#else
218static 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