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1/*
2 * Copyright (C) 2005 Intel Corporation
3 * Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
4 *
5 * Alex Chiang <achiang@hp.com>
6 * - Unified x86/ia64 implementations
7 * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
8 * - Added _PDC for platforms with Intel CPUs
9 */
10#include <linux/dmi.h>
11#include <linux/slab.h>
12
13#include <acpi/acpi_drivers.h>
14#include <acpi/processor.h>
15
16#include "internal.h"
17
18#define PREFIX "ACPI: "
19#define _COMPONENT ACPI_PROCESSOR_COMPONENT
20ACPI_MODULE_NAME("processor_core");
21
22static int __init set_no_mwait(const struct dmi_system_id *id)
23{
24 printk(KERN_NOTICE PREFIX "%s detected - "
25 "disabling mwait for CPU C-states\n", id->ident);
26 boot_option_idle_override = IDLE_NOMWAIT;
27 return 0;
28}
29
30static struct dmi_system_id __initdata processor_idle_dmi_table[] = {
31 {
32 set_no_mwait, "Extensa 5220", {
33 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
34 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
35 DMI_MATCH(DMI_PRODUCT_VERSION, "0100"),
36 DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL},
37 {},
38};
39
40static int map_lapic_id(struct acpi_subtable_header *entry,
41 u32 acpi_id, int *apic_id)
42{
43 struct acpi_madt_local_apic *lapic =
44 (struct acpi_madt_local_apic *)entry;
45
46 if (!(lapic->lapic_flags & ACPI_MADT_ENABLED))
47 return 0;
48
49 if (lapic->processor_id != acpi_id)
50 return 0;
51
52 *apic_id = lapic->id;
53 return 1;
54}
55
56static int map_x2apic_id(struct acpi_subtable_header *entry,
57 int device_declaration, u32 acpi_id, int *apic_id)
58{
59 struct acpi_madt_local_x2apic *apic =
60 (struct acpi_madt_local_x2apic *)entry;
61
62 if (!(apic->lapic_flags & ACPI_MADT_ENABLED))
63 return 0;
64
65 if (device_declaration && (apic->uid == acpi_id)) {
66 *apic_id = apic->local_apic_id;
67 return 1;
68 }
69
70 return 0;
71}
72
73static int map_lsapic_id(struct acpi_subtable_header *entry,
74 int device_declaration, u32 acpi_id, int *apic_id)
75{
76 struct acpi_madt_local_sapic *lsapic =
77 (struct acpi_madt_local_sapic *)entry;
78
79 if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
80 return 0;
81
82 if (device_declaration) {
83 if ((entry->length < 16) || (lsapic->uid != acpi_id))
84 return 0;
85 } else if (lsapic->processor_id != acpi_id)
86 return 0;
87
88 *apic_id = (lsapic->id << 8) | lsapic->eid;
89 return 1;
90}
91
92static int map_madt_entry(int type, u32 acpi_id)
93{
94 unsigned long madt_end, entry;
95 static struct acpi_table_madt *madt;
96 static int read_madt;
97 int apic_id = -1;
98
99 if (!read_madt) {
100 if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
101 (struct acpi_table_header **)&madt)))
102 madt = NULL;
103 read_madt++;
104 }
105
106 if (!madt)
107 return apic_id;
108
109 entry = (unsigned long)madt;
110 madt_end = entry + madt->header.length;
111
112 /* Parse all entries looking for a match. */
113
114 entry += sizeof(struct acpi_table_madt);
115 while (entry + sizeof(struct acpi_subtable_header) < madt_end) {
116 struct acpi_subtable_header *header =
117 (struct acpi_subtable_header *)entry;
118 if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
119 if (map_lapic_id(header, acpi_id, &apic_id))
120 break;
121 } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) {
122 if (map_x2apic_id(header, type, acpi_id, &apic_id))
123 break;
124 } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
125 if (map_lsapic_id(header, type, acpi_id, &apic_id))
126 break;
127 }
128 entry += header->length;
129 }
130 return apic_id;
131}
132
133static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
134{
135 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
136 union acpi_object *obj;
137 struct acpi_subtable_header *header;
138 int apic_id = -1;
139
140 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
141 goto exit;
142
143 if (!buffer.length || !buffer.pointer)
144 goto exit;
145
146 obj = buffer.pointer;
147 if (obj->type != ACPI_TYPE_BUFFER ||
148 obj->buffer.length < sizeof(struct acpi_subtable_header)) {
149 goto exit;
150 }
151
152 header = (struct acpi_subtable_header *)obj->buffer.pointer;
153 if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
154 map_lapic_id(header, acpi_id, &apic_id);
155 } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
156 map_lsapic_id(header, type, acpi_id, &apic_id);
157 }
158
159exit:
160 if (buffer.pointer)
161 kfree(buffer.pointer);
162 return apic_id;
163}
164
165int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
166{
167#ifdef CONFIG_SMP
168 int i;
169#endif
170 int apic_id = -1;
171
172 apic_id = map_mat_entry(handle, type, acpi_id);
173 if (apic_id == -1)
174 apic_id = map_madt_entry(type, acpi_id);
175 if (apic_id == -1)
176 return apic_id;
177
178#ifdef CONFIG_SMP
179 for_each_possible_cpu(i) {
180 if (cpu_physical_id(i) == apic_id)
181 return i;
182 }
183#else
184 /* In UP kernel, only processor 0 is valid */
185 if (apic_id == 0)
186 return apic_id;
187#endif
188 return -1;
189}
190EXPORT_SYMBOL_GPL(acpi_get_cpuid);
191
192static bool __init processor_physically_present(acpi_handle handle)
193{
194 int cpuid, type;
195 u32 acpi_id;
196 acpi_status status;
197 acpi_object_type acpi_type;
198 unsigned long long tmp;
199 union acpi_object object = { 0 };
200 struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
201
202 status = acpi_get_type(handle, &acpi_type);
203 if (ACPI_FAILURE(status))
204 return false;
205
206 switch (acpi_type) {
207 case ACPI_TYPE_PROCESSOR:
208 status = acpi_evaluate_object(handle, NULL, NULL, &buffer);
209 if (ACPI_FAILURE(status))
210 return false;
211 acpi_id = object.processor.proc_id;
212 break;
213 case ACPI_TYPE_DEVICE:
214 status = acpi_evaluate_integer(handle, "_UID", NULL, &tmp);
215 if (ACPI_FAILURE(status))
216 return false;
217 acpi_id = tmp;
218 break;
219 default:
220 return false;
221 }
222
223 type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0;
224 cpuid = acpi_get_cpuid(handle, type, acpi_id);
225
226 if (cpuid == -1)
227 return false;
228
229 return true;
230}
231
232static void __cpuinit acpi_set_pdc_bits(u32 *buf)
233{
234 buf[0] = ACPI_PDC_REVISION_ID;
235 buf[1] = 1;
236
237 /* Enable coordination with firmware's _TSD info */
238 buf[2] = ACPI_PDC_SMP_T_SWCOORD;
239
240 /* Twiddle arch-specific bits needed for _PDC */
241 arch_acpi_set_pdc_bits(buf);
242}
243
244static struct acpi_object_list *__cpuinit acpi_processor_alloc_pdc(void)
245{
246 struct acpi_object_list *obj_list;
247 union acpi_object *obj;
248 u32 *buf;
249
250 /* allocate and initialize pdc. It will be used later. */
251 obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL);
252 if (!obj_list) {
253 printk(KERN_ERR "Memory allocation error\n");
254 return NULL;
255 }
256
257 obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL);
258 if (!obj) {
259 printk(KERN_ERR "Memory allocation error\n");
260 kfree(obj_list);
261 return NULL;
262 }
263
264 buf = kmalloc(12, GFP_KERNEL);
265 if (!buf) {
266 printk(KERN_ERR "Memory allocation error\n");
267 kfree(obj);
268 kfree(obj_list);
269 return NULL;
270 }
271
272 acpi_set_pdc_bits(buf);
273
274 obj->type = ACPI_TYPE_BUFFER;
275 obj->buffer.length = 12;
276 obj->buffer.pointer = (u8 *) buf;
277 obj_list->count = 1;
278 obj_list->pointer = obj;
279
280 return obj_list;
281}
282
283/*
284 * _PDC is required for a BIOS-OS handshake for most of the newer
285 * ACPI processor features.
286 */
287static int __cpuinit
288acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in)
289{
290 acpi_status status = AE_OK;
291
292 if (boot_option_idle_override == IDLE_NOMWAIT) {
293 /*
294 * If mwait is disabled for CPU C-states, the C2C3_FFH access
295 * mode will be disabled in the parameter of _PDC object.
296 * Of course C1_FFH access mode will also be disabled.
297 */
298 union acpi_object *obj;
299 u32 *buffer = NULL;
300
301 obj = pdc_in->pointer;
302 buffer = (u32 *)(obj->buffer.pointer);
303 buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH);
304
305 }
306 status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL);
307
308 if (ACPI_FAILURE(status))
309 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
310 "Could not evaluate _PDC, using legacy perf. control.\n"));
311
312 return status;
313}
314
315void __cpuinit acpi_processor_set_pdc(acpi_handle handle)
316{
317 struct acpi_object_list *obj_list;
318
319 if (arch_has_acpi_pdc() == false)
320 return;
321
322 obj_list = acpi_processor_alloc_pdc();
323 if (!obj_list)
324 return;
325
326 acpi_processor_eval_pdc(handle, obj_list);
327
328 kfree(obj_list->pointer->buffer.pointer);
329 kfree(obj_list->pointer);
330 kfree(obj_list);
331}
332
333static acpi_status __init
334early_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv)
335{
336 if (processor_physically_present(handle) == false)
337 return AE_OK;
338
339 acpi_processor_set_pdc(handle);
340 return AE_OK;
341}
342
343void __init acpi_early_processor_set_pdc(void)
344{
345 /*
346 * Check whether the system is DMI table. If yes, OSPM
347 * should not use mwait for CPU-states.
348 */
349 dmi_check_system(processor_idle_dmi_table);
350
351 acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,
352 ACPI_UINT32_MAX,
353 early_init_pdc, NULL, NULL, NULL);
354 acpi_get_devices("ACPI0007", early_init_pdc, NULL, NULL);
355}
1/*
2 * Copyright (C) 2005 Intel Corporation
3 * Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
4 *
5 * Alex Chiang <achiang@hp.com>
6 * - Unified x86/ia64 implementations
7 *
8 * I/O APIC hotplug support
9 * Yinghai Lu <yinghai@kernel.org>
10 * Jiang Liu <jiang.liu@intel.com>
11 */
12#include <linux/export.h>
13#include <linux/acpi.h>
14#include <acpi/processor.h>
15
16#define _COMPONENT ACPI_PROCESSOR_COMPONENT
17ACPI_MODULE_NAME("processor_core");
18
19static struct acpi_table_madt *get_madt_table(void)
20{
21 static struct acpi_table_madt *madt;
22 static int read_madt;
23
24 if (!read_madt) {
25 if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
26 (struct acpi_table_header **)&madt)))
27 madt = NULL;
28 read_madt++;
29 }
30
31 return madt;
32}
33
34static int map_lapic_id(struct acpi_subtable_header *entry,
35 u32 acpi_id, phys_cpuid_t *apic_id)
36{
37 struct acpi_madt_local_apic *lapic =
38 container_of(entry, struct acpi_madt_local_apic, header);
39
40 if (!(lapic->lapic_flags & ACPI_MADT_ENABLED))
41 return -ENODEV;
42
43 if (lapic->processor_id != acpi_id)
44 return -EINVAL;
45
46 *apic_id = lapic->id;
47 return 0;
48}
49
50static int map_x2apic_id(struct acpi_subtable_header *entry,
51 int device_declaration, u32 acpi_id, phys_cpuid_t *apic_id)
52{
53 struct acpi_madt_local_x2apic *apic =
54 container_of(entry, struct acpi_madt_local_x2apic, header);
55
56 if (!(apic->lapic_flags & ACPI_MADT_ENABLED))
57 return -ENODEV;
58
59 if (device_declaration && (apic->uid == acpi_id)) {
60 *apic_id = apic->local_apic_id;
61 return 0;
62 }
63
64 return -EINVAL;
65}
66
67static int map_lsapic_id(struct acpi_subtable_header *entry,
68 int device_declaration, u32 acpi_id, phys_cpuid_t *apic_id)
69{
70 struct acpi_madt_local_sapic *lsapic =
71 container_of(entry, struct acpi_madt_local_sapic, header);
72
73 if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
74 return -ENODEV;
75
76 if (device_declaration) {
77 if ((entry->length < 16) || (lsapic->uid != acpi_id))
78 return -EINVAL;
79 } else if (lsapic->processor_id != acpi_id)
80 return -EINVAL;
81
82 *apic_id = (lsapic->id << 8) | lsapic->eid;
83 return 0;
84}
85
86/*
87 * Retrieve the ARM CPU physical identifier (MPIDR)
88 */
89static int map_gicc_mpidr(struct acpi_subtable_header *entry,
90 int device_declaration, u32 acpi_id, phys_cpuid_t *mpidr)
91{
92 struct acpi_madt_generic_interrupt *gicc =
93 container_of(entry, struct acpi_madt_generic_interrupt, header);
94
95 if (!(gicc->flags & ACPI_MADT_ENABLED))
96 return -ENODEV;
97
98 /* device_declaration means Device object in DSDT, in the
99 * GIC interrupt model, logical processors are required to
100 * have a Processor Device object in the DSDT, so we should
101 * check device_declaration here
102 */
103 if (device_declaration && (gicc->uid == acpi_id)) {
104 *mpidr = gicc->arm_mpidr;
105 return 0;
106 }
107
108 return -EINVAL;
109}
110
111static phys_cpuid_t map_madt_entry(struct acpi_table_madt *madt,
112 int type, u32 acpi_id)
113{
114 unsigned long madt_end, entry;
115 phys_cpuid_t phys_id = PHYS_CPUID_INVALID; /* CPU hardware ID */
116
117 if (!madt)
118 return phys_id;
119
120 entry = (unsigned long)madt;
121 madt_end = entry + madt->header.length;
122
123 /* Parse all entries looking for a match. */
124
125 entry += sizeof(struct acpi_table_madt);
126 while (entry + sizeof(struct acpi_subtable_header) < madt_end) {
127 struct acpi_subtable_header *header =
128 (struct acpi_subtable_header *)entry;
129 if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
130 if (!map_lapic_id(header, acpi_id, &phys_id))
131 break;
132 } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) {
133 if (!map_x2apic_id(header, type, acpi_id, &phys_id))
134 break;
135 } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
136 if (!map_lsapic_id(header, type, acpi_id, &phys_id))
137 break;
138 } else if (header->type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) {
139 if (!map_gicc_mpidr(header, type, acpi_id, &phys_id))
140 break;
141 }
142 entry += header->length;
143 }
144 return phys_id;
145}
146
147phys_cpuid_t __init acpi_map_madt_entry(u32 acpi_id)
148{
149 struct acpi_table_madt *madt = NULL;
150 phys_cpuid_t rv;
151
152 acpi_get_table(ACPI_SIG_MADT, 0,
153 (struct acpi_table_header **)&madt);
154 if (!madt)
155 return PHYS_CPUID_INVALID;
156
157 rv = map_madt_entry(madt, 1, acpi_id);
158
159 acpi_put_table((struct acpi_table_header *)madt);
160
161 return rv;
162}
163
164static phys_cpuid_t map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
165{
166 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
167 union acpi_object *obj;
168 struct acpi_subtable_header *header;
169 phys_cpuid_t phys_id = PHYS_CPUID_INVALID;
170
171 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
172 goto exit;
173
174 if (!buffer.length || !buffer.pointer)
175 goto exit;
176
177 obj = buffer.pointer;
178 if (obj->type != ACPI_TYPE_BUFFER ||
179 obj->buffer.length < sizeof(struct acpi_subtable_header)) {
180 goto exit;
181 }
182
183 header = (struct acpi_subtable_header *)obj->buffer.pointer;
184 if (header->type == ACPI_MADT_TYPE_LOCAL_APIC)
185 map_lapic_id(header, acpi_id, &phys_id);
186 else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC)
187 map_lsapic_id(header, type, acpi_id, &phys_id);
188 else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC)
189 map_x2apic_id(header, type, acpi_id, &phys_id);
190 else if (header->type == ACPI_MADT_TYPE_GENERIC_INTERRUPT)
191 map_gicc_mpidr(header, type, acpi_id, &phys_id);
192
193exit:
194 kfree(buffer.pointer);
195 return phys_id;
196}
197
198phys_cpuid_t acpi_get_phys_id(acpi_handle handle, int type, u32 acpi_id)
199{
200 phys_cpuid_t phys_id;
201
202 phys_id = map_mat_entry(handle, type, acpi_id);
203 if (invalid_phys_cpuid(phys_id))
204 phys_id = map_madt_entry(get_madt_table(), type, acpi_id);
205
206 return phys_id;
207}
208
209int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id)
210{
211#ifdef CONFIG_SMP
212 int i;
213#endif
214
215 if (invalid_phys_cpuid(phys_id)) {
216 /*
217 * On UP processor, there is no _MAT or MADT table.
218 * So above phys_id is always set to PHYS_CPUID_INVALID.
219 *
220 * BIOS may define multiple CPU handles even for UP processor.
221 * For example,
222 *
223 * Scope (_PR)
224 * {
225 * Processor (CPU0, 0x00, 0x00000410, 0x06) {}
226 * Processor (CPU1, 0x01, 0x00000410, 0x06) {}
227 * Processor (CPU2, 0x02, 0x00000410, 0x06) {}
228 * Processor (CPU3, 0x03, 0x00000410, 0x06) {}
229 * }
230 *
231 * Ignores phys_id and always returns 0 for the processor
232 * handle with acpi id 0 if nr_cpu_ids is 1.
233 * This should be the case if SMP tables are not found.
234 * Return -EINVAL for other CPU's handle.
235 */
236 if (nr_cpu_ids <= 1 && acpi_id == 0)
237 return acpi_id;
238 else
239 return -EINVAL;
240 }
241
242#ifdef CONFIG_SMP
243 for_each_possible_cpu(i) {
244 if (cpu_physical_id(i) == phys_id)
245 return i;
246 }
247#else
248 /* In UP kernel, only processor 0 is valid */
249 if (phys_id == 0)
250 return phys_id;
251#endif
252 return -ENODEV;
253}
254
255int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
256{
257 phys_cpuid_t phys_id;
258
259 phys_id = acpi_get_phys_id(handle, type, acpi_id);
260
261 return acpi_map_cpuid(phys_id, acpi_id);
262}
263EXPORT_SYMBOL_GPL(acpi_get_cpuid);
264
265#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
266static int get_ioapic_id(struct acpi_subtable_header *entry, u32 gsi_base,
267 u64 *phys_addr, int *ioapic_id)
268{
269 struct acpi_madt_io_apic *ioapic = (struct acpi_madt_io_apic *)entry;
270
271 if (ioapic->global_irq_base != gsi_base)
272 return 0;
273
274 *phys_addr = ioapic->address;
275 *ioapic_id = ioapic->id;
276 return 1;
277}
278
279static int parse_madt_ioapic_entry(u32 gsi_base, u64 *phys_addr)
280{
281 struct acpi_subtable_header *hdr;
282 unsigned long madt_end, entry;
283 struct acpi_table_madt *madt;
284 int apic_id = -1;
285
286 madt = get_madt_table();
287 if (!madt)
288 return apic_id;
289
290 entry = (unsigned long)madt;
291 madt_end = entry + madt->header.length;
292
293 /* Parse all entries looking for a match. */
294 entry += sizeof(struct acpi_table_madt);
295 while (entry + sizeof(struct acpi_subtable_header) < madt_end) {
296 hdr = (struct acpi_subtable_header *)entry;
297 if (hdr->type == ACPI_MADT_TYPE_IO_APIC &&
298 get_ioapic_id(hdr, gsi_base, phys_addr, &apic_id))
299 break;
300 else
301 entry += hdr->length;
302 }
303
304 return apic_id;
305}
306
307static int parse_mat_ioapic_entry(acpi_handle handle, u32 gsi_base,
308 u64 *phys_addr)
309{
310 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
311 struct acpi_subtable_header *header;
312 union acpi_object *obj;
313 int apic_id = -1;
314
315 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
316 goto exit;
317
318 if (!buffer.length || !buffer.pointer)
319 goto exit;
320
321 obj = buffer.pointer;
322 if (obj->type != ACPI_TYPE_BUFFER ||
323 obj->buffer.length < sizeof(struct acpi_subtable_header))
324 goto exit;
325
326 header = (struct acpi_subtable_header *)obj->buffer.pointer;
327 if (header->type == ACPI_MADT_TYPE_IO_APIC)
328 get_ioapic_id(header, gsi_base, phys_addr, &apic_id);
329
330exit:
331 kfree(buffer.pointer);
332 return apic_id;
333}
334
335/**
336 * acpi_get_ioapic_id - Get IOAPIC ID and physical address matching @gsi_base
337 * @handle: ACPI object for IOAPIC device
338 * @gsi_base: GSI base to match with
339 * @phys_addr: Pointer to store physical address of matching IOAPIC record
340 *
341 * Walk resources returned by ACPI_MAT method, then ACPI MADT table, to search
342 * for an ACPI IOAPIC record matching @gsi_base.
343 * Return IOAPIC id and store physical address in @phys_addr if found a match,
344 * otherwise return <0.
345 */
346int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr)
347{
348 int apic_id;
349
350 apic_id = parse_mat_ioapic_entry(handle, gsi_base, phys_addr);
351 if (apic_id == -1)
352 apic_id = parse_madt_ioapic_entry(gsi_base, phys_addr);
353
354 return apic_id;
355}
356#endif /* CONFIG_ACPI_HOTPLUG_IOAPIC */