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9#include <linux/threads.h>
10#include <linux/cpumask.h>
11#include <linux/export.h>
12#include <linux/string.h>
13#include <linux/kernel.h>
14#include <linux/ctype.h>
15#include <linux/init.h>
16#include <linux/errno.h>
17#include <asm/fixmap.h>
18#include <asm/mpspec.h>
19#include <asm/apicdef.h>
20#include <asm/apic.h>
21#include <asm/setup.h>
22
23#include <linux/smp.h>
24#include <asm/ipi.h>
25
26#include <linux/interrupt.h>
27#include <asm/acpi.h>
28#include <asm/e820/api.h>
29
30#ifdef CONFIG_HOTPLUG_CPU
31#define DEFAULT_SEND_IPI (1)
32#else
33#define DEFAULT_SEND_IPI (0)
34#endif
35
36int no_broadcast = DEFAULT_SEND_IPI;
37
38static __init int no_ipi_broadcast(char *str)
39{
40 get_option(&str, &no_broadcast);
41 pr_info("Using %s mode\n",
42 no_broadcast ? "No IPI Broadcast" : "IPI Broadcast");
43 return 1;
44}
45__setup("no_ipi_broadcast=", no_ipi_broadcast);
46
47static int __init print_ipi_mode(void)
48{
49 pr_info("Using IPI %s mode\n",
50 no_broadcast ? "No-Shortcut" : "Shortcut");
51 return 0;
52}
53late_initcall(print_ipi_mode);
54
55static int default_x86_32_early_logical_apicid(int cpu)
56{
57 return 1 << cpu;
58}
59
60static void setup_apic_flat_routing(void)
61{
62#ifdef CONFIG_X86_IO_APIC
63 printk(KERN_INFO
64 "Enabling APIC mode: Flat. Using %d I/O APICs\n",
65 nr_ioapics);
66#endif
67}
68
69static int default_apic_id_registered(void)
70{
71 return physid_isset(read_apic_id(), phys_cpu_present_map);
72}
73
74
75
76
77
78
79static void default_init_apic_ldr(void)
80{
81 unsigned long val;
82
83 apic_write(APIC_DFR, APIC_DFR_VALUE);
84 val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
85 val |= SET_APIC_LOGICAL_ID(1UL << smp_processor_id());
86 apic_write(APIC_LDR, val);
87}
88
89static int default_phys_pkg_id(int cpuid_apic, int index_msb)
90{
91 return cpuid_apic >> index_msb;
92}
93
94
95static int probe_default(void)
96{
97 return 1;
98}
99
100static struct apic apic_default __ro_after_init = {
101
102 .name = "default",
103 .probe = probe_default,
104 .acpi_madt_oem_check = NULL,
105 .apic_id_valid = default_apic_id_valid,
106 .apic_id_registered = default_apic_id_registered,
107
108 .irq_delivery_mode = dest_Fixed,
109
110 .irq_dest_mode = 1,
111
112 .disable_esr = 0,
113 .dest_logical = APIC_DEST_LOGICAL,
114 .check_apicid_used = default_check_apicid_used,
115
116 .init_apic_ldr = default_init_apic_ldr,
117
118 .ioapic_phys_id_map = default_ioapic_phys_id_map,
119 .setup_apic_routing = setup_apic_flat_routing,
120 .cpu_present_to_apicid = default_cpu_present_to_apicid,
121 .apicid_to_cpu_present = physid_set_mask_of_physid,
122 .check_phys_apicid_present = default_check_phys_apicid_present,
123 .phys_pkg_id = default_phys_pkg_id,
124
125 .get_apic_id = default_get_apic_id,
126 .set_apic_id = NULL,
127
128 .calc_dest_apicid = apic_flat_calc_apicid,
129
130 .send_IPI = default_send_IPI_single,
131 .send_IPI_mask = default_send_IPI_mask_logical,
132 .send_IPI_mask_allbutself = default_send_IPI_mask_allbutself_logical,
133 .send_IPI_allbutself = default_send_IPI_allbutself,
134 .send_IPI_all = default_send_IPI_all,
135 .send_IPI_self = default_send_IPI_self,
136
137 .inquire_remote_apic = default_inquire_remote_apic,
138
139 .read = native_apic_mem_read,
140 .write = native_apic_mem_write,
141 .eoi_write = native_apic_mem_write,
142 .icr_read = native_apic_icr_read,
143 .icr_write = native_apic_icr_write,
144 .wait_icr_idle = native_apic_wait_icr_idle,
145 .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
146
147 .x86_32_early_logical_apicid = default_x86_32_early_logical_apicid,
148};
149
150apic_driver(apic_default);
151
152struct apic *apic __ro_after_init = &apic_default;
153EXPORT_SYMBOL_GPL(apic);
154
155static int cmdline_apic __initdata;
156static int __init parse_apic(char *arg)
157{
158 struct apic **drv;
159
160 if (!arg)
161 return -EINVAL;
162
163 for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
164 if (!strcmp((*drv)->name, arg)) {
165 apic = *drv;
166 cmdline_apic = 1;
167 return 0;
168 }
169 }
170
171
172 return 0;
173}
174early_param("apic", parse_apic);
175
176void __init default_setup_apic_routing(void)
177{
178 int version = boot_cpu_apic_version;
179
180 if (num_possible_cpus() > 8) {
181 switch (boot_cpu_data.x86_vendor) {
182 case X86_VENDOR_INTEL:
183 if (!APIC_XAPIC(version)) {
184 def_to_bigsmp = 0;
185 break;
186 }
187
188
189 case X86_VENDOR_HYGON:
190 case X86_VENDOR_AMD:
191 def_to_bigsmp = 1;
192 }
193 }
194
195#ifdef CONFIG_X86_BIGSMP
196
197
198
199
200
201
202
203 if (!cmdline_apic && apic == &apic_default)
204 generic_bigsmp_probe();
205#endif
206
207 if (apic->setup_apic_routing)
208 apic->setup_apic_routing();
209
210 if (x86_platform.apic_post_init)
211 x86_platform.apic_post_init();
212}
213
214void __init generic_apic_probe(void)
215{
216 if (!cmdline_apic) {
217 struct apic **drv;
218
219 for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
220 if ((*drv)->probe()) {
221 apic = *drv;
222 break;
223 }
224 }
225
226 if (drv == __apicdrivers_end)
227 panic("Didn't find an APIC driver");
228 }
229 printk(KERN_INFO "Using APIC driver %s\n", apic->name);
230}
231
232
233int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
234{
235 struct apic **drv;
236
237 for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
238 if (!(*drv)->acpi_madt_oem_check)
239 continue;
240 if (!(*drv)->acpi_madt_oem_check(oem_id, oem_table_id))
241 continue;
242
243 if (!cmdline_apic) {
244 apic = *drv;
245 printk(KERN_INFO "Switched to APIC driver `%s'.\n",
246 apic->name);
247 }
248 return 1;
249 }
250 return 0;
251}
252