1#ifndef _ASM_X86_APIC_H
2#define _ASM_X86_APIC_H
3
4#include <linux/cpumask.h>
5
6#include <asm/alternative.h>
7#include <asm/cpufeature.h>
8#include <asm/apicdef.h>
9#include <linux/atomic.h>
10#include <asm/fixmap.h>
11#include <asm/mpspec.h>
12#include <asm/msr.h>
13#include <asm/hardirq.h>
14
15#define ARCH_APICTIMER_STOPS_ON_C3 1
16
17/*
18 * Debugging macros
19 */
20#define APIC_QUIET 0
21#define APIC_VERBOSE 1
22#define APIC_DEBUG 2
23
24/* Macros for apic_extnmi which controls external NMI masking */
25#define APIC_EXTNMI_BSP 0 /* Default */
26#define APIC_EXTNMI_ALL 1
27#define APIC_EXTNMI_NONE 2
28
29/*
30 * Define the default level of output to be very little
31 * This can be turned up by using apic=verbose for more
32 * information and apic=debug for _lots_ of information.
33 * apic_verbosity is defined in apic.c
34 */
35#define apic_printk(v, s, a...) do { \
36 if ((v) <= apic_verbosity) \
37 printk(s, ##a); \
38 } while (0)
39
40
41#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
42extern void generic_apic_probe(void);
43#else
44static inline void generic_apic_probe(void)
45{
46}
47#endif
48
49#ifdef CONFIG_X86_LOCAL_APIC
50
51extern unsigned int apic_verbosity;
52extern int local_apic_timer_c2_ok;
53
54extern int disable_apic;
55extern unsigned int lapic_timer_frequency;
56
57extern enum apic_intr_mode_id apic_intr_mode;
58enum apic_intr_mode_id {
59 APIC_PIC,
60 APIC_VIRTUAL_WIRE,
61 APIC_VIRTUAL_WIRE_NO_CONFIG,
62 APIC_SYMMETRIC_IO,
63 APIC_SYMMETRIC_IO_NO_ROUTING
64};
65
66#ifdef CONFIG_SMP
67extern void __inquire_remote_apic(int apicid);
68#else /* CONFIG_SMP */
69static inline void __inquire_remote_apic(int apicid)
70{
71}
72#endif /* CONFIG_SMP */
73
74static inline void default_inquire_remote_apic(int apicid)
75{
76 if (apic_verbosity >= APIC_DEBUG)
77 __inquire_remote_apic(apicid);
78}
79
80/*
81 * With 82489DX we can't rely on apic feature bit
82 * retrieved via cpuid but still have to deal with
83 * such an apic chip so we assume that SMP configuration
84 * is found from MP table (64bit case uses ACPI mostly
85 * which set smp presence flag as well so we are safe
86 * to use this helper too).
87 */
88static inline bool apic_from_smp_config(void)
89{
90 return smp_found_config && !disable_apic;
91}
92
93/*
94 * Basic functions accessing APICs.
95 */
96#ifdef CONFIG_PARAVIRT
97#include <asm/paravirt.h>
98#endif
99
100extern int setup_profiling_timer(unsigned int);
101
102static inline void native_apic_mem_write(u32 reg, u32 v)
103{
104 volatile u32 *addr = (volatile u32 *)(APIC_BASE + reg);
105
106 alternative_io("movl %0, %P1", "xchgl %0, %P1", X86_BUG_11AP,
107 ASM_OUTPUT2("=r" (v), "=m" (*addr)),
108 ASM_OUTPUT2("0" (v), "m" (*addr)));
109}
110
111static inline u32 native_apic_mem_read(u32 reg)
112{
113 return *((volatile u32 *)(APIC_BASE + reg));
114}
115
116extern void native_apic_wait_icr_idle(void);
117extern u32 native_safe_apic_wait_icr_idle(void);
118extern void native_apic_icr_write(u32 low, u32 id);
119extern u64 native_apic_icr_read(void);
120
121static inline bool apic_is_x2apic_enabled(void)
122{
123 u64 msr;
124
125 if (rdmsrl_safe(MSR_IA32_APICBASE, &msr))
126 return false;
127 return msr & X2APIC_ENABLE;
128}
129
130extern void enable_IR_x2apic(void);
131
132extern int get_physical_broadcast(void);
133
134extern int lapic_get_maxlvt(void);
135extern void clear_local_APIC(void);
136extern void disconnect_bsp_APIC(int virt_wire_setup);
137extern void disable_local_APIC(void);
138extern void lapic_shutdown(void);
139extern void sync_Arb_IDs(void);
140extern void init_bsp_APIC(void);
141extern void apic_intr_mode_init(void);
142extern void init_apic_mappings(void);
143void register_lapic_address(unsigned long address);
144extern void setup_boot_APIC_clock(void);
145extern void setup_secondary_APIC_clock(void);
146extern void lapic_update_tsc_freq(void);
147
148#ifdef CONFIG_X86_64
149static inline int apic_force_enable(unsigned long addr)
150{
151 return -1;
152}
153#else
154extern int apic_force_enable(unsigned long addr);
155#endif
156
157extern void apic_bsp_setup(bool upmode);
158extern void apic_ap_setup(void);
159
160/*
161 * On 32bit this is mach-xxx local
162 */
163#ifdef CONFIG_X86_64
164extern int apic_is_clustered_box(void);
165#else
166static inline int apic_is_clustered_box(void)
167{
168 return 0;
169}
170#endif
171
172extern int setup_APIC_eilvt(u8 lvt_off, u8 vector, u8 msg_type, u8 mask);
173extern void lapic_assign_system_vectors(void);
174extern void lapic_assign_legacy_vector(unsigned int isairq, bool replace);
175extern void lapic_online(void);
176extern void lapic_offline(void);
177
178#else /* !CONFIG_X86_LOCAL_APIC */
179static inline void lapic_shutdown(void) { }
180#define local_apic_timer_c2_ok 1
181static inline void init_apic_mappings(void) { }
182static inline void disable_local_APIC(void) { }
183# define setup_boot_APIC_clock x86_init_noop
184# define setup_secondary_APIC_clock x86_init_noop
185static inline void lapic_update_tsc_freq(void) { }
186static inline void init_bsp_APIC(void) { }
187static inline void apic_intr_mode_init(void) { }
188static inline void lapic_assign_system_vectors(void) { }
189static inline void lapic_assign_legacy_vector(unsigned int i, bool r) { }
190#endif /* !CONFIG_X86_LOCAL_APIC */
191
192#ifdef CONFIG_X86_X2APIC
193/*
194 * Make previous memory operations globally visible before
195 * sending the IPI through x2apic wrmsr. We need a serializing instruction or
196 * mfence for this.
197 */
198static inline void x2apic_wrmsr_fence(void)
199{
200 asm volatile("mfence" : : : "memory");
201}
202
203static inline void native_apic_msr_write(u32 reg, u32 v)
204{
205 if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR ||
206 reg == APIC_LVR)
207 return;
208
209 wrmsr(APIC_BASE_MSR + (reg >> 4), v, 0);
210}
211
212static inline void native_apic_msr_eoi_write(u32 reg, u32 v)
213{
214 __wrmsr(APIC_BASE_MSR + (APIC_EOI >> 4), APIC_EOI_ACK, 0);
215}
216
217static inline u32 native_apic_msr_read(u32 reg)
218{
219 u64 msr;
220
221 if (reg == APIC_DFR)
222 return -1;
223
224 rdmsrl(APIC_BASE_MSR + (reg >> 4), msr);
225 return (u32)msr;
226}
227
228static inline void native_x2apic_wait_icr_idle(void)
229{
230 /* no need to wait for icr idle in x2apic */
231 return;
232}
233
234static inline u32 native_safe_x2apic_wait_icr_idle(void)
235{
236 /* no need to wait for icr idle in x2apic */
237 return 0;
238}
239
240static inline void native_x2apic_icr_write(u32 low, u32 id)
241{
242 wrmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), ((__u64) id) << 32 | low);
243}
244
245static inline u64 native_x2apic_icr_read(void)
246{
247 unsigned long val;
248
249 rdmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), val);
250 return val;
251}
252
253extern int x2apic_mode;
254extern int x2apic_phys;
255extern void __init check_x2apic(void);
256extern void x2apic_setup(void);
257static inline int x2apic_enabled(void)
258{
259 return boot_cpu_has(X86_FEATURE_X2APIC) && apic_is_x2apic_enabled();
260}
261
262#define x2apic_supported() (boot_cpu_has(X86_FEATURE_X2APIC))
263#else /* !CONFIG_X86_X2APIC */
264static inline void check_x2apic(void) { }
265static inline void x2apic_setup(void) { }
266static inline int x2apic_enabled(void) { return 0; }
267
268#define x2apic_mode (0)
269#define x2apic_supported() (0)
270#endif /* !CONFIG_X86_X2APIC */
271
272struct irq_data;
273
274/*
275 * Copyright 2004 James Cleverdon, IBM.
276 * Subject to the GNU Public License, v.2
277 *
278 * Generic APIC sub-arch data struct.
279 *
280 * Hacked for x86-64 by James Cleverdon from i386 architecture code by
281 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
282 * James Cleverdon.
283 */
284struct apic {
285 /* Hotpath functions first */
286 void (*eoi_write)(u32 reg, u32 v);
287 void (*native_eoi_write)(u32 reg, u32 v);
288 void (*write)(u32 reg, u32 v);
289 u32 (*read)(u32 reg);
290
291 /* IPI related functions */
292 void (*wait_icr_idle)(void);
293 u32 (*safe_wait_icr_idle)(void);
294
295 void (*send_IPI)(int cpu, int vector);
296 void (*send_IPI_mask)(const struct cpumask *mask, int vector);
297 void (*send_IPI_mask_allbutself)(const struct cpumask *msk, int vec);
298 void (*send_IPI_allbutself)(int vector);
299 void (*send_IPI_all)(int vector);
300 void (*send_IPI_self)(int vector);
301
302 /* dest_logical is used by the IPI functions */
303 u32 dest_logical;
304 u32 disable_esr;
305 u32 irq_delivery_mode;
306 u32 irq_dest_mode;
307
308 u32 (*calc_dest_apicid)(unsigned int cpu);
309
310 /* ICR related functions */
311 u64 (*icr_read)(void);
312 void (*icr_write)(u32 low, u32 high);
313
314 /* Probe, setup and smpboot functions */
315 int (*probe)(void);
316 int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id);
317 int (*apic_id_valid)(u32 apicid);
318 int (*apic_id_registered)(void);
319
320 bool (*check_apicid_used)(physid_mask_t *map, int apicid);
321 void (*init_apic_ldr)(void);
322 void (*ioapic_phys_id_map)(physid_mask_t *phys_map, physid_mask_t *retmap);
323 void (*setup_apic_routing)(void);
324 int (*cpu_present_to_apicid)(int mps_cpu);
325 void (*apicid_to_cpu_present)(int phys_apicid, physid_mask_t *retmap);
326 int (*check_phys_apicid_present)(int phys_apicid);
327 int (*phys_pkg_id)(int cpuid_apic, int index_msb);
328
329 u32 (*get_apic_id)(unsigned long x);
330 u32 (*set_apic_id)(unsigned int id);
331
332 /* wakeup_secondary_cpu */
333 int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip);
334
335 void (*inquire_remote_apic)(int apicid);
336
337#ifdef CONFIG_X86_32
338 /*
339 * Called very early during boot from get_smp_config(). It should
340 * return the logical apicid. x86_[bios]_cpu_to_apicid is
341 * initialized before this function is called.
342 *
343 * If logical apicid can't be determined that early, the function
344 * may return BAD_APICID. Logical apicid will be configured after
345 * init_apic_ldr() while bringing up CPUs. Note that NUMA affinity
346 * won't be applied properly during early boot in this case.
347 */
348 int (*x86_32_early_logical_apicid)(int cpu);
349#endif
350 char *name;
351};
352
353/*
354 * Pointer to the local APIC driver in use on this system (there's
355 * always just one such driver in use - the kernel decides via an
356 * early probing process which one it picks - and then sticks to it):
357 */
358extern struct apic *apic;
359
360/*
361 * APIC drivers are probed based on how they are listed in the .apicdrivers
362 * section. So the order is important and enforced by the ordering
363 * of different apic driver files in the Makefile.
364 *
365 * For the files having two apic drivers, we use apic_drivers()
366 * to enforce the order with in them.
367 */
368#define apic_driver(sym) \
369 static const struct apic *__apicdrivers_##sym __used \
370 __aligned(sizeof(struct apic *)) \
371 __section(.apicdrivers) = { &sym }
372
373#define apic_drivers(sym1, sym2) \
374 static struct apic *__apicdrivers_##sym1##sym2[2] __used \
375 __aligned(sizeof(struct apic *)) \
376 __section(.apicdrivers) = { &sym1, &sym2 }
377
378extern struct apic *__apicdrivers[], *__apicdrivers_end[];
379
380/*
381 * APIC functionality to boot other CPUs - only used on SMP:
382 */
383#ifdef CONFIG_SMP
384extern int wakeup_secondary_cpu_via_nmi(int apicid, unsigned long start_eip);
385extern int lapic_can_unplug_cpu(void);
386#endif
387
388#ifdef CONFIG_X86_LOCAL_APIC
389
390static inline u32 apic_read(u32 reg)
391{
392 return apic->read(reg);
393}
394
395static inline void apic_write(u32 reg, u32 val)
396{
397 apic->write(reg, val);
398}
399
400static inline void apic_eoi(void)
401{
402 apic->eoi_write(APIC_EOI, APIC_EOI_ACK);
403}
404
405static inline u64 apic_icr_read(void)
406{
407 return apic->icr_read();
408}
409
410static inline void apic_icr_write(u32 low, u32 high)
411{
412 apic->icr_write(low, high);
413}
414
415static inline void apic_wait_icr_idle(void)
416{
417 apic->wait_icr_idle();
418}
419
420static inline u32 safe_apic_wait_icr_idle(void)
421{
422 return apic->safe_wait_icr_idle();
423}
424
425extern void __init apic_set_eoi_write(void (*eoi_write)(u32 reg, u32 v));
426
427#else /* CONFIG_X86_LOCAL_APIC */
428
429static inline u32 apic_read(u32 reg) { return 0; }
430static inline void apic_write(u32 reg, u32 val) { }
431static inline void apic_eoi(void) { }
432static inline u64 apic_icr_read(void) { return 0; }
433static inline void apic_icr_write(u32 low, u32 high) { }
434static inline void apic_wait_icr_idle(void) { }
435static inline u32 safe_apic_wait_icr_idle(void) { return 0; }
436static inline void apic_set_eoi_write(void (*eoi_write)(u32 reg, u32 v)) {}
437
438#endif /* CONFIG_X86_LOCAL_APIC */
439
440extern void apic_ack_irq(struct irq_data *data);
441
442static inline void ack_APIC_irq(void)
443{
444 /*
445 * ack_APIC_irq() actually gets compiled as a single instruction
446 * ... yummie.
447 */
448 apic_eoi();
449}
450
451static inline unsigned default_get_apic_id(unsigned long x)
452{
453 unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
454
455 if (APIC_XAPIC(ver) || boot_cpu_has(X86_FEATURE_EXTD_APICID))
456 return (x >> 24) & 0xFF;
457 else
458 return (x >> 24) & 0x0F;
459}
460
461/*
462 * Warm reset vector position:
463 */
464#define TRAMPOLINE_PHYS_LOW 0x467
465#define TRAMPOLINE_PHYS_HIGH 0x469
466
467#ifdef CONFIG_X86_64
468extern void apic_send_IPI_self(int vector);
469
470DECLARE_PER_CPU(int, x2apic_extra_bits);
471#endif
472
473extern void generic_bigsmp_probe(void);
474
475#ifdef CONFIG_X86_LOCAL_APIC
476
477#include <asm/smp.h>
478
479#define APIC_DFR_VALUE (APIC_DFR_FLAT)
480
481DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
482
483extern struct apic apic_noop;
484
485static inline unsigned int read_apic_id(void)
486{
487 unsigned int reg = apic_read(APIC_ID);
488
489 return apic->get_apic_id(reg);
490}
491
492extern int default_apic_id_valid(u32 apicid);
493extern int default_acpi_madt_oem_check(char *, char *);
494extern void default_setup_apic_routing(void);
495
496extern u32 apic_default_calc_apicid(unsigned int cpu);
497extern u32 apic_flat_calc_apicid(unsigned int cpu);
498
499extern bool default_check_apicid_used(physid_mask_t *map, int apicid);
500extern void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap);
501extern int default_cpu_present_to_apicid(int mps_cpu);
502extern int default_check_phys_apicid_present(int phys_apicid);
503
504#endif /* CONFIG_X86_LOCAL_APIC */
505
506#ifdef CONFIG_SMP
507bool apic_id_is_primary_thread(unsigned int id);
508#else
509static inline bool apic_id_is_primary_thread(unsigned int id) { return false; }
510#endif
511
512extern void irq_enter(void);
513extern void irq_exit(void);
514
515static inline void entering_irq(void)
516{
517 irq_enter();
518 kvm_set_cpu_l1tf_flush_l1d();
519}
520
521static inline void entering_ack_irq(void)
522{
523 entering_irq();
524 ack_APIC_irq();
525}
526
527static inline void ipi_entering_ack_irq(void)
528{
529 irq_enter();
530 ack_APIC_irq();
531 kvm_set_cpu_l1tf_flush_l1d();
532}
533
534static inline void exiting_irq(void)
535{
536 irq_exit();
537}
538
539static inline void exiting_ack_irq(void)
540{
541 ack_APIC_irq();
542 irq_exit();
543}
544
545extern void ioapic_zap_locks(void);
546
547#endif /* _ASM_X86_APIC_H */
548