Commit | Line | Data |
---|---|---|
97222cc8 ED |
1 | |
2 | /* | |
3 | * Local APIC virtualization | |
4 | * | |
5 | * Copyright (C) 2006 Qumranet, Inc. | |
6 | * Copyright (C) 2007 Novell | |
7 | * Copyright (C) 2007 Intel | |
8 | * | |
9 | * Authors: | |
10 | * Dor Laor <dor.laor@qumranet.com> | |
11 | * Gregory Haskins <ghaskins@novell.com> | |
12 | * Yaozu (Eddie) Dong <eddie.dong@intel.com> | |
13 | * | |
14 | * Based on Xen 3.1 code, Copyright (c) 2004, Intel Corporation. | |
15 | * | |
16 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
17 | * the COPYING file in the top-level directory. | |
18 | */ | |
19 | ||
edf88417 | 20 | #include <linux/kvm_host.h> |
97222cc8 ED |
21 | #include <linux/kvm.h> |
22 | #include <linux/mm.h> | |
23 | #include <linux/highmem.h> | |
24 | #include <linux/smp.h> | |
25 | #include <linux/hrtimer.h> | |
26 | #include <linux/io.h> | |
27 | #include <linux/module.h> | |
6f6d6a1a | 28 | #include <linux/math64.h> |
97222cc8 ED |
29 | #include <asm/processor.h> |
30 | #include <asm/msr.h> | |
31 | #include <asm/page.h> | |
32 | #include <asm/current.h> | |
33 | #include <asm/apicdef.h> | |
34 | #include <asm/atomic.h> | |
5fdbf976 | 35 | #include "kvm_cache_regs.h" |
97222cc8 ED |
36 | #include "irq.h" |
37 | ||
b682b814 MT |
38 | #ifndef CONFIG_X86_64 |
39 | #define mod_64(x, y) ((x) - (y) * div64_u64(x, y)) | |
40 | #else | |
41 | #define mod_64(x, y) ((x) % (y)) | |
42 | #endif | |
43 | ||
97222cc8 ED |
44 | #define PRId64 "d" |
45 | #define PRIx64 "llx" | |
46 | #define PRIu64 "u" | |
47 | #define PRIo64 "o" | |
48 | ||
49 | #define APIC_BUS_CYCLE_NS 1 | |
50 | ||
51 | /* #define apic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg) */ | |
52 | #define apic_debug(fmt, arg...) | |
53 | ||
54 | #define APIC_LVT_NUM 6 | |
55 | /* 14 is the version for Xeon and Pentium 8.4.8*/ | |
56 | #define APIC_VERSION (0x14UL | ((APIC_LVT_NUM - 1) << 16)) | |
57 | #define LAPIC_MMIO_LENGTH (1 << 12) | |
58 | /* followed define is not in apicdef.h */ | |
59 | #define APIC_SHORT_MASK 0xc0000 | |
60 | #define APIC_DEST_NOSHORT 0x0 | |
61 | #define APIC_DEST_MASK 0x800 | |
62 | #define MAX_APIC_VECTOR 256 | |
63 | ||
64 | #define VEC_POS(v) ((v) & (32 - 1)) | |
65 | #define REG_POS(v) (((v) >> 5) << 4) | |
ad312c7c | 66 | |
97222cc8 ED |
67 | static inline u32 apic_get_reg(struct kvm_lapic *apic, int reg_off) |
68 | { | |
69 | return *((u32 *) (apic->regs + reg_off)); | |
70 | } | |
71 | ||
72 | static inline void apic_set_reg(struct kvm_lapic *apic, int reg_off, u32 val) | |
73 | { | |
74 | *((u32 *) (apic->regs + reg_off)) = val; | |
75 | } | |
76 | ||
77 | static inline int apic_test_and_set_vector(int vec, void *bitmap) | |
78 | { | |
79 | return test_and_set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); | |
80 | } | |
81 | ||
82 | static inline int apic_test_and_clear_vector(int vec, void *bitmap) | |
83 | { | |
84 | return test_and_clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); | |
85 | } | |
86 | ||
87 | static inline void apic_set_vector(int vec, void *bitmap) | |
88 | { | |
89 | set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); | |
90 | } | |
91 | ||
92 | static inline void apic_clear_vector(int vec, void *bitmap) | |
93 | { | |
94 | clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); | |
95 | } | |
96 | ||
97 | static inline int apic_hw_enabled(struct kvm_lapic *apic) | |
98 | { | |
ad312c7c | 99 | return (apic)->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE; |
97222cc8 ED |
100 | } |
101 | ||
102 | static inline int apic_sw_enabled(struct kvm_lapic *apic) | |
103 | { | |
104 | return apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_APIC_ENABLED; | |
105 | } | |
106 | ||
107 | static inline int apic_enabled(struct kvm_lapic *apic) | |
108 | { | |
109 | return apic_sw_enabled(apic) && apic_hw_enabled(apic); | |
110 | } | |
111 | ||
112 | #define LVT_MASK \ | |
113 | (APIC_LVT_MASKED | APIC_SEND_PENDING | APIC_VECTOR_MASK) | |
114 | ||
115 | #define LINT_MASK \ | |
116 | (LVT_MASK | APIC_MODE_MASK | APIC_INPUT_POLARITY | \ | |
117 | APIC_LVT_REMOTE_IRR | APIC_LVT_LEVEL_TRIGGER) | |
118 | ||
119 | static inline int kvm_apic_id(struct kvm_lapic *apic) | |
120 | { | |
121 | return (apic_get_reg(apic, APIC_ID) >> 24) & 0xff; | |
122 | } | |
123 | ||
124 | static inline int apic_lvt_enabled(struct kvm_lapic *apic, int lvt_type) | |
125 | { | |
126 | return !(apic_get_reg(apic, lvt_type) & APIC_LVT_MASKED); | |
127 | } | |
128 | ||
129 | static inline int apic_lvt_vector(struct kvm_lapic *apic, int lvt_type) | |
130 | { | |
131 | return apic_get_reg(apic, lvt_type) & APIC_VECTOR_MASK; | |
132 | } | |
133 | ||
134 | static inline int apic_lvtt_period(struct kvm_lapic *apic) | |
135 | { | |
136 | return apic_get_reg(apic, APIC_LVTT) & APIC_LVT_TIMER_PERIODIC; | |
137 | } | |
138 | ||
cc6e462c JK |
139 | static inline int apic_lvt_nmi_mode(u32 lvt_val) |
140 | { | |
141 | return (lvt_val & (APIC_MODE_MASK | APIC_LVT_MASKED)) == APIC_DM_NMI; | |
142 | } | |
143 | ||
97222cc8 ED |
144 | static unsigned int apic_lvt_mask[APIC_LVT_NUM] = { |
145 | LVT_MASK | APIC_LVT_TIMER_PERIODIC, /* LVTT */ | |
146 | LVT_MASK | APIC_MODE_MASK, /* LVTTHMR */ | |
147 | LVT_MASK | APIC_MODE_MASK, /* LVTPC */ | |
148 | LINT_MASK, LINT_MASK, /* LVT0-1 */ | |
149 | LVT_MASK /* LVTERR */ | |
150 | }; | |
151 | ||
152 | static int find_highest_vector(void *bitmap) | |
153 | { | |
154 | u32 *word = bitmap; | |
155 | int word_offset = MAX_APIC_VECTOR >> 5; | |
156 | ||
157 | while ((word_offset != 0) && (word[(--word_offset) << 2] == 0)) | |
158 | continue; | |
159 | ||
160 | if (likely(!word_offset && !word[0])) | |
161 | return -1; | |
162 | else | |
163 | return fls(word[word_offset << 2]) - 1 + (word_offset << 5); | |
164 | } | |
165 | ||
166 | static inline int apic_test_and_set_irr(int vec, struct kvm_lapic *apic) | |
167 | { | |
168 | return apic_test_and_set_vector(vec, apic->regs + APIC_IRR); | |
169 | } | |
170 | ||
171 | static inline void apic_clear_irr(int vec, struct kvm_lapic *apic) | |
172 | { | |
173 | apic_clear_vector(vec, apic->regs + APIC_IRR); | |
174 | } | |
175 | ||
176 | static inline int apic_find_highest_irr(struct kvm_lapic *apic) | |
177 | { | |
178 | int result; | |
179 | ||
180 | result = find_highest_vector(apic->regs + APIC_IRR); | |
181 | ASSERT(result == -1 || result >= 16); | |
182 | ||
183 | return result; | |
184 | } | |
185 | ||
6e5d865c YS |
186 | int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu) |
187 | { | |
ad312c7c | 188 | struct kvm_lapic *apic = vcpu->arch.apic; |
6e5d865c YS |
189 | int highest_irr; |
190 | ||
191 | if (!apic) | |
192 | return 0; | |
193 | highest_irr = apic_find_highest_irr(apic); | |
194 | ||
195 | return highest_irr; | |
196 | } | |
197 | EXPORT_SYMBOL_GPL(kvm_lapic_find_highest_irr); | |
198 | ||
8be5453f | 199 | int kvm_apic_set_irq(struct kvm_vcpu *vcpu, u8 vec, u8 trig) |
97222cc8 | 200 | { |
ad312c7c | 201 | struct kvm_lapic *apic = vcpu->arch.apic; |
8be5453f | 202 | |
97222cc8 ED |
203 | if (!apic_test_and_set_irr(vec, apic)) { |
204 | /* a new pending irq is set in IRR */ | |
205 | if (trig) | |
206 | apic_set_vector(vec, apic->regs + APIC_TMR); | |
207 | else | |
208 | apic_clear_vector(vec, apic->regs + APIC_TMR); | |
209 | kvm_vcpu_kick(apic->vcpu); | |
210 | return 1; | |
211 | } | |
212 | return 0; | |
213 | } | |
214 | ||
215 | static inline int apic_find_highest_isr(struct kvm_lapic *apic) | |
216 | { | |
217 | int result; | |
218 | ||
219 | result = find_highest_vector(apic->regs + APIC_ISR); | |
220 | ASSERT(result == -1 || result >= 16); | |
221 | ||
222 | return result; | |
223 | } | |
224 | ||
225 | static void apic_update_ppr(struct kvm_lapic *apic) | |
226 | { | |
227 | u32 tpr, isrv, ppr; | |
228 | int isr; | |
229 | ||
230 | tpr = apic_get_reg(apic, APIC_TASKPRI); | |
231 | isr = apic_find_highest_isr(apic); | |
232 | isrv = (isr != -1) ? isr : 0; | |
233 | ||
234 | if ((tpr & 0xf0) >= (isrv & 0xf0)) | |
235 | ppr = tpr & 0xff; | |
236 | else | |
237 | ppr = isrv & 0xf0; | |
238 | ||
239 | apic_debug("vlapic %p, ppr 0x%x, isr 0x%x, isrv 0x%x", | |
240 | apic, ppr, isr, isrv); | |
241 | ||
242 | apic_set_reg(apic, APIC_PROCPRI, ppr); | |
243 | } | |
244 | ||
245 | static void apic_set_tpr(struct kvm_lapic *apic, u32 tpr) | |
246 | { | |
247 | apic_set_reg(apic, APIC_TASKPRI, tpr); | |
248 | apic_update_ppr(apic); | |
249 | } | |
250 | ||
251 | int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest) | |
252 | { | |
253 | return kvm_apic_id(apic) == dest; | |
254 | } | |
255 | ||
256 | int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda) | |
257 | { | |
258 | int result = 0; | |
259 | u8 logical_id; | |
260 | ||
261 | logical_id = GET_APIC_LOGICAL_ID(apic_get_reg(apic, APIC_LDR)); | |
262 | ||
263 | switch (apic_get_reg(apic, APIC_DFR)) { | |
264 | case APIC_DFR_FLAT: | |
265 | if (logical_id & mda) | |
266 | result = 1; | |
267 | break; | |
268 | case APIC_DFR_CLUSTER: | |
269 | if (((logical_id >> 4) == (mda >> 0x4)) | |
270 | && (logical_id & mda & 0xf)) | |
271 | result = 1; | |
272 | break; | |
273 | default: | |
274 | printk(KERN_WARNING "Bad DFR vcpu %d: %08x\n", | |
275 | apic->vcpu->vcpu_id, apic_get_reg(apic, APIC_DFR)); | |
276 | break; | |
277 | } | |
278 | ||
279 | return result; | |
280 | } | |
281 | ||
282 | static int apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, | |
283 | int short_hand, int dest, int dest_mode) | |
284 | { | |
285 | int result = 0; | |
ad312c7c | 286 | struct kvm_lapic *target = vcpu->arch.apic; |
97222cc8 ED |
287 | |
288 | apic_debug("target %p, source %p, dest 0x%x, " | |
289 | "dest_mode 0x%x, short_hand 0x%x", | |
290 | target, source, dest, dest_mode, short_hand); | |
291 | ||
292 | ASSERT(!target); | |
293 | switch (short_hand) { | |
294 | case APIC_DEST_NOSHORT: | |
295 | if (dest_mode == 0) { | |
296 | /* Physical mode. */ | |
297 | if ((dest == 0xFF) || (dest == kvm_apic_id(target))) | |
298 | result = 1; | |
299 | } else | |
300 | /* Logical mode. */ | |
301 | result = kvm_apic_match_logical_addr(target, dest); | |
302 | break; | |
303 | case APIC_DEST_SELF: | |
304 | if (target == source) | |
305 | result = 1; | |
306 | break; | |
307 | case APIC_DEST_ALLINC: | |
308 | result = 1; | |
309 | break; | |
310 | case APIC_DEST_ALLBUT: | |
311 | if (target != source) | |
312 | result = 1; | |
313 | break; | |
314 | default: | |
315 | printk(KERN_WARNING "Bad dest shorthand value %x\n", | |
316 | short_hand); | |
317 | break; | |
318 | } | |
319 | ||
320 | return result; | |
321 | } | |
322 | ||
323 | /* | |
324 | * Add a pending IRQ into lapic. | |
325 | * Return 1 if successfully added and 0 if discarded. | |
326 | */ | |
327 | static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, | |
328 | int vector, int level, int trig_mode) | |
329 | { | |
c5ec1534 HQ |
330 | int orig_irr, result = 0; |
331 | struct kvm_vcpu *vcpu = apic->vcpu; | |
97222cc8 ED |
332 | |
333 | switch (delivery_mode) { | |
334 | case APIC_DM_FIXED: | |
335 | case APIC_DM_LOWEST: | |
336 | /* FIXME add logic for vcpu on reset */ | |
337 | if (unlikely(!apic_enabled(apic))) | |
338 | break; | |
339 | ||
1b9778da ED |
340 | orig_irr = apic_test_and_set_irr(vector, apic); |
341 | if (orig_irr && trig_mode) { | |
97222cc8 ED |
342 | apic_debug("level trig mode repeatedly for vector %d", |
343 | vector); | |
344 | break; | |
345 | } | |
346 | ||
347 | if (trig_mode) { | |
348 | apic_debug("level trig mode for vector %d", vector); | |
349 | apic_set_vector(vector, apic->regs + APIC_TMR); | |
350 | } else | |
351 | apic_clear_vector(vector, apic->regs + APIC_TMR); | |
352 | ||
d7690175 | 353 | kvm_vcpu_kick(vcpu); |
97222cc8 | 354 | |
1b9778da | 355 | result = (orig_irr == 0); |
97222cc8 ED |
356 | break; |
357 | ||
358 | case APIC_DM_REMRD: | |
359 | printk(KERN_DEBUG "Ignoring delivery mode 3\n"); | |
360 | break; | |
361 | ||
362 | case APIC_DM_SMI: | |
363 | printk(KERN_DEBUG "Ignoring guest SMI\n"); | |
364 | break; | |
3419ffc8 | 365 | |
97222cc8 | 366 | case APIC_DM_NMI: |
3419ffc8 | 367 | kvm_inject_nmi(vcpu); |
26df99c6 | 368 | kvm_vcpu_kick(vcpu); |
97222cc8 ED |
369 | break; |
370 | ||
371 | case APIC_DM_INIT: | |
c5ec1534 | 372 | if (level) { |
a4535290 | 373 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
c5ec1534 HQ |
374 | printk(KERN_DEBUG |
375 | "INIT on a runnable vcpu %d\n", | |
376 | vcpu->vcpu_id); | |
a4535290 | 377 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; |
c5ec1534 HQ |
378 | kvm_vcpu_kick(vcpu); |
379 | } else { | |
1b10bf31 JK |
380 | apic_debug("Ignoring de-assert INIT to vcpu %d\n", |
381 | vcpu->vcpu_id); | |
c5ec1534 | 382 | } |
97222cc8 ED |
383 | break; |
384 | ||
385 | case APIC_DM_STARTUP: | |
1b10bf31 JK |
386 | apic_debug("SIPI to vcpu %d vector 0x%02x\n", |
387 | vcpu->vcpu_id, vector); | |
a4535290 | 388 | if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { |
ad312c7c | 389 | vcpu->arch.sipi_vector = vector; |
a4535290 | 390 | vcpu->arch.mp_state = KVM_MP_STATE_SIPI_RECEIVED; |
d7690175 | 391 | kvm_vcpu_kick(vcpu); |
c5ec1534 | 392 | } |
97222cc8 ED |
393 | break; |
394 | ||
23930f95 JK |
395 | case APIC_DM_EXTINT: |
396 | /* | |
397 | * Should only be called by kvm_apic_local_deliver() with LVT0, | |
398 | * before NMI watchdog was enabled. Already handled by | |
399 | * kvm_apic_accept_pic_intr(). | |
400 | */ | |
401 | break; | |
402 | ||
97222cc8 ED |
403 | default: |
404 | printk(KERN_ERR "TODO: unsupported delivery mode %x\n", | |
405 | delivery_mode); | |
406 | break; | |
407 | } | |
408 | return result; | |
409 | } | |
410 | ||
8be5453f | 411 | static struct kvm_lapic *kvm_apic_round_robin(struct kvm *kvm, u8 vector, |
110c2fae | 412 | unsigned long *bitmap) |
97222cc8 | 413 | { |
932f72ad HQ |
414 | int last; |
415 | int next; | |
e4d47f40 | 416 | struct kvm_lapic *apic = NULL; |
932f72ad | 417 | |
bfc6d222 | 418 | last = kvm->arch.round_robin_prev_vcpu; |
932f72ad HQ |
419 | next = last; |
420 | ||
421 | do { | |
422 | if (++next == KVM_MAX_VCPUS) | |
423 | next = 0; | |
110c2fae | 424 | if (kvm->vcpus[next] == NULL || !test_bit(next, bitmap)) |
932f72ad | 425 | continue; |
ad312c7c | 426 | apic = kvm->vcpus[next]->arch.apic; |
932f72ad HQ |
427 | if (apic && apic_enabled(apic)) |
428 | break; | |
429 | apic = NULL; | |
430 | } while (next != last); | |
bfc6d222 | 431 | kvm->arch.round_robin_prev_vcpu = next; |
932f72ad | 432 | |
e4d47f40 QH |
433 | if (!apic) |
434 | printk(KERN_DEBUG "vcpu not ready for apic_round_robin\n"); | |
97222cc8 | 435 | |
932f72ad | 436 | return apic; |
97222cc8 ED |
437 | } |
438 | ||
8be5453f | 439 | struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector, |
110c2fae | 440 | unsigned long *bitmap) |
8be5453f ZX |
441 | { |
442 | struct kvm_lapic *apic; | |
443 | ||
444 | apic = kvm_apic_round_robin(kvm, vector, bitmap); | |
445 | if (apic) | |
446 | return apic->vcpu; | |
447 | return NULL; | |
448 | } | |
449 | ||
97222cc8 ED |
450 | static void apic_set_eoi(struct kvm_lapic *apic) |
451 | { | |
452 | int vector = apic_find_highest_isr(apic); | |
f5244726 | 453 | int trigger_mode; |
97222cc8 ED |
454 | /* |
455 | * Not every write EOI will has corresponding ISR, | |
456 | * one example is when Kernel check timer on setup_IO_APIC | |
457 | */ | |
458 | if (vector == -1) | |
459 | return; | |
460 | ||
461 | apic_clear_vector(vector, apic->regs + APIC_ISR); | |
462 | apic_update_ppr(apic); | |
463 | ||
464 | if (apic_test_and_clear_vector(vector, apic->regs + APIC_TMR)) | |
f5244726 MT |
465 | trigger_mode = IOAPIC_LEVEL_TRIG; |
466 | else | |
467 | trigger_mode = IOAPIC_EDGE_TRIG; | |
468 | kvm_ioapic_update_eoi(apic->vcpu->kvm, vector, trigger_mode); | |
97222cc8 ED |
469 | } |
470 | ||
471 | static void apic_send_ipi(struct kvm_lapic *apic) | |
472 | { | |
473 | u32 icr_low = apic_get_reg(apic, APIC_ICR); | |
474 | u32 icr_high = apic_get_reg(apic, APIC_ICR2); | |
475 | ||
476 | unsigned int dest = GET_APIC_DEST_FIELD(icr_high); | |
477 | unsigned int short_hand = icr_low & APIC_SHORT_MASK; | |
478 | unsigned int trig_mode = icr_low & APIC_INT_LEVELTRIG; | |
479 | unsigned int level = icr_low & APIC_INT_ASSERT; | |
480 | unsigned int dest_mode = icr_low & APIC_DEST_MASK; | |
481 | unsigned int delivery_mode = icr_low & APIC_MODE_MASK; | |
482 | unsigned int vector = icr_low & APIC_VECTOR_MASK; | |
483 | ||
8be5453f | 484 | struct kvm_vcpu *target; |
97222cc8 | 485 | struct kvm_vcpu *vcpu; |
bfd349d0 | 486 | DECLARE_BITMAP(lpr_map, KVM_MAX_VCPUS); |
97222cc8 ED |
487 | int i; |
488 | ||
bfd349d0 | 489 | bitmap_zero(lpr_map, KVM_MAX_VCPUS); |
97222cc8 ED |
490 | apic_debug("icr_high 0x%x, icr_low 0x%x, " |
491 | "short_hand 0x%x, dest 0x%x, trig_mode 0x%x, level 0x%x, " | |
492 | "dest_mode 0x%x, delivery_mode 0x%x, vector 0x%x\n", | |
493 | icr_high, icr_low, short_hand, dest, | |
494 | trig_mode, level, dest_mode, delivery_mode, vector); | |
495 | ||
496 | for (i = 0; i < KVM_MAX_VCPUS; i++) { | |
497 | vcpu = apic->vcpu->kvm->vcpus[i]; | |
498 | if (!vcpu) | |
499 | continue; | |
500 | ||
ad312c7c | 501 | if (vcpu->arch.apic && |
97222cc8 ED |
502 | apic_match_dest(vcpu, apic, short_hand, dest, dest_mode)) { |
503 | if (delivery_mode == APIC_DM_LOWEST) | |
bfd349d0 | 504 | __set_bit(vcpu->vcpu_id, lpr_map); |
97222cc8 | 505 | else |
ad312c7c | 506 | __apic_accept_irq(vcpu->arch.apic, delivery_mode, |
97222cc8 ED |
507 | vector, level, trig_mode); |
508 | } | |
509 | } | |
510 | ||
511 | if (delivery_mode == APIC_DM_LOWEST) { | |
bfd349d0 | 512 | target = kvm_get_lowest_prio_vcpu(vcpu->kvm, vector, lpr_map); |
97222cc8 | 513 | if (target != NULL) |
ad312c7c | 514 | __apic_accept_irq(target->arch.apic, delivery_mode, |
97222cc8 ED |
515 | vector, level, trig_mode); |
516 | } | |
517 | } | |
518 | ||
519 | static u32 apic_get_tmcct(struct kvm_lapic *apic) | |
520 | { | |
b682b814 MT |
521 | ktime_t remaining; |
522 | s64 ns; | |
9da8f4e8 | 523 | u32 tmcct; |
97222cc8 ED |
524 | |
525 | ASSERT(apic != NULL); | |
526 | ||
9da8f4e8 | 527 | /* if initial count is 0, current count should also be 0 */ |
b682b814 | 528 | if (apic_get_reg(apic, APIC_TMICT) == 0) |
9da8f4e8 KP |
529 | return 0; |
530 | ||
d3c7b77d | 531 | remaining = hrtimer_expires_remaining(&apic->lapic_timer.timer); |
b682b814 MT |
532 | if (ktime_to_ns(remaining) < 0) |
533 | remaining = ktime_set(0, 0); | |
534 | ||
d3c7b77d MT |
535 | ns = mod_64(ktime_to_ns(remaining), apic->lapic_timer.period); |
536 | tmcct = div64_u64(ns, | |
537 | (APIC_BUS_CYCLE_NS * apic->divide_count)); | |
97222cc8 ED |
538 | |
539 | return tmcct; | |
540 | } | |
541 | ||
b209749f AK |
542 | static void __report_tpr_access(struct kvm_lapic *apic, bool write) |
543 | { | |
544 | struct kvm_vcpu *vcpu = apic->vcpu; | |
545 | struct kvm_run *run = vcpu->run; | |
546 | ||
547 | set_bit(KVM_REQ_REPORT_TPR_ACCESS, &vcpu->requests); | |
5fdbf976 | 548 | run->tpr_access.rip = kvm_rip_read(vcpu); |
b209749f AK |
549 | run->tpr_access.is_write = write; |
550 | } | |
551 | ||
552 | static inline void report_tpr_access(struct kvm_lapic *apic, bool write) | |
553 | { | |
554 | if (apic->vcpu->arch.tpr_access_reporting) | |
555 | __report_tpr_access(apic, write); | |
556 | } | |
557 | ||
97222cc8 ED |
558 | static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset) |
559 | { | |
560 | u32 val = 0; | |
561 | ||
c7bf23ba JR |
562 | KVMTRACE_1D(APIC_ACCESS, apic->vcpu, (u32)offset, handler); |
563 | ||
97222cc8 ED |
564 | if (offset >= LAPIC_MMIO_LENGTH) |
565 | return 0; | |
566 | ||
567 | switch (offset) { | |
568 | case APIC_ARBPRI: | |
569 | printk(KERN_WARNING "Access APIC ARBPRI register " | |
570 | "which is for P6\n"); | |
571 | break; | |
572 | ||
573 | case APIC_TMCCT: /* Timer CCR */ | |
574 | val = apic_get_tmcct(apic); | |
575 | break; | |
576 | ||
b209749f AK |
577 | case APIC_TASKPRI: |
578 | report_tpr_access(apic, false); | |
579 | /* fall thru */ | |
97222cc8 | 580 | default: |
6e5d865c | 581 | apic_update_ppr(apic); |
97222cc8 ED |
582 | val = apic_get_reg(apic, offset); |
583 | break; | |
584 | } | |
585 | ||
586 | return val; | |
587 | } | |
588 | ||
589 | static void apic_mmio_read(struct kvm_io_device *this, | |
590 | gpa_t address, int len, void *data) | |
591 | { | |
592 | struct kvm_lapic *apic = (struct kvm_lapic *)this->private; | |
593 | unsigned int offset = address - apic->base_address; | |
594 | unsigned char alignment = offset & 0xf; | |
595 | u32 result; | |
596 | ||
597 | if ((alignment + len) > 4) { | |
598 | printk(KERN_ERR "KVM_APIC_READ: alignment error %lx %d", | |
599 | (unsigned long)address, len); | |
600 | return; | |
601 | } | |
602 | result = __apic_read(apic, offset & ~0xf); | |
603 | ||
604 | switch (len) { | |
605 | case 1: | |
606 | case 2: | |
607 | case 4: | |
608 | memcpy(data, (char *)&result + alignment, len); | |
609 | break; | |
610 | default: | |
611 | printk(KERN_ERR "Local APIC read with len = %x, " | |
612 | "should be 1,2, or 4 instead\n", len); | |
613 | break; | |
614 | } | |
615 | } | |
616 | ||
617 | static void update_divide_count(struct kvm_lapic *apic) | |
618 | { | |
619 | u32 tmp1, tmp2, tdcr; | |
620 | ||
621 | tdcr = apic_get_reg(apic, APIC_TDCR); | |
622 | tmp1 = tdcr & 0xf; | |
623 | tmp2 = ((tmp1 & 0x3) | ((tmp1 & 0x8) >> 1)) + 1; | |
d3c7b77d | 624 | apic->divide_count = 0x1 << (tmp2 & 0x7); |
97222cc8 ED |
625 | |
626 | apic_debug("timer divide count is 0x%x\n", | |
d3c7b77d | 627 | apic->lapic_timer.divide_count); |
97222cc8 ED |
628 | } |
629 | ||
630 | static void start_apic_timer(struct kvm_lapic *apic) | |
631 | { | |
d3c7b77d | 632 | ktime_t now = apic->lapic_timer.timer.base->get_time(); |
97222cc8 | 633 | |
d3c7b77d MT |
634 | apic->lapic_timer.period = apic_get_reg(apic, APIC_TMICT) * |
635 | APIC_BUS_CYCLE_NS * apic->divide_count; | |
636 | atomic_set(&apic->lapic_timer.pending, 0); | |
0b975a3c | 637 | |
d3c7b77d | 638 | if (!apic->lapic_timer.period) |
0b975a3c AK |
639 | return; |
640 | ||
d3c7b77d MT |
641 | hrtimer_start(&apic->lapic_timer.timer, |
642 | ktime_add_ns(now, apic->lapic_timer.period), | |
97222cc8 ED |
643 | HRTIMER_MODE_ABS); |
644 | ||
645 | apic_debug("%s: bus cycle is %" PRId64 "ns, now 0x%016" | |
646 | PRIx64 ", " | |
647 | "timer initial count 0x%x, period %lldns, " | |
b8688d51 | 648 | "expire @ 0x%016" PRIx64 ".\n", __func__, |
97222cc8 ED |
649 | APIC_BUS_CYCLE_NS, ktime_to_ns(now), |
650 | apic_get_reg(apic, APIC_TMICT), | |
d3c7b77d | 651 | apic->lapic_timer.period, |
97222cc8 | 652 | ktime_to_ns(ktime_add_ns(now, |
d3c7b77d | 653 | apic->lapic_timer.period))); |
97222cc8 ED |
654 | } |
655 | ||
cc6e462c JK |
656 | static void apic_manage_nmi_watchdog(struct kvm_lapic *apic, u32 lvt0_val) |
657 | { | |
658 | int nmi_wd_enabled = apic_lvt_nmi_mode(apic_get_reg(apic, APIC_LVT0)); | |
659 | ||
660 | if (apic_lvt_nmi_mode(lvt0_val)) { | |
661 | if (!nmi_wd_enabled) { | |
662 | apic_debug("Receive NMI setting on APIC_LVT0 " | |
663 | "for cpu %d\n", apic->vcpu->vcpu_id); | |
664 | apic->vcpu->kvm->arch.vapics_in_nmi_mode++; | |
665 | } | |
666 | } else if (nmi_wd_enabled) | |
667 | apic->vcpu->kvm->arch.vapics_in_nmi_mode--; | |
668 | } | |
669 | ||
97222cc8 ED |
670 | static void apic_mmio_write(struct kvm_io_device *this, |
671 | gpa_t address, int len, const void *data) | |
672 | { | |
673 | struct kvm_lapic *apic = (struct kvm_lapic *)this->private; | |
674 | unsigned int offset = address - apic->base_address; | |
675 | unsigned char alignment = offset & 0xf; | |
676 | u32 val; | |
677 | ||
678 | /* | |
679 | * APIC register must be aligned on 128-bits boundary. | |
680 | * 32/64/128 bits registers must be accessed thru 32 bits. | |
681 | * Refer SDM 8.4.1 | |
682 | */ | |
683 | if (len != 4 || alignment) { | |
1b10bf31 JK |
684 | /* Don't shout loud, $infamous_os would cause only noise. */ |
685 | apic_debug("apic write: bad size=%d %lx\n", | |
686 | len, (long)address); | |
97222cc8 ED |
687 | return; |
688 | } | |
689 | ||
690 | val = *(u32 *) data; | |
691 | ||
692 | /* too common printing */ | |
693 | if (offset != APIC_EOI) | |
694 | apic_debug("%s: offset 0x%x with length 0x%x, and value is " | |
b8688d51 | 695 | "0x%x\n", __func__, offset, len, val); |
97222cc8 ED |
696 | |
697 | offset &= 0xff0; | |
698 | ||
c7bf23ba JR |
699 | KVMTRACE_1D(APIC_ACCESS, apic->vcpu, (u32)offset, handler); |
700 | ||
97222cc8 ED |
701 | switch (offset) { |
702 | case APIC_ID: /* Local APIC ID */ | |
703 | apic_set_reg(apic, APIC_ID, val); | |
704 | break; | |
705 | ||
706 | case APIC_TASKPRI: | |
b209749f | 707 | report_tpr_access(apic, true); |
97222cc8 ED |
708 | apic_set_tpr(apic, val & 0xff); |
709 | break; | |
710 | ||
711 | case APIC_EOI: | |
712 | apic_set_eoi(apic); | |
713 | break; | |
714 | ||
715 | case APIC_LDR: | |
716 | apic_set_reg(apic, APIC_LDR, val & APIC_LDR_MASK); | |
717 | break; | |
718 | ||
719 | case APIC_DFR: | |
720 | apic_set_reg(apic, APIC_DFR, val | 0x0FFFFFFF); | |
721 | break; | |
722 | ||
723 | case APIC_SPIV: | |
724 | apic_set_reg(apic, APIC_SPIV, val & 0x3ff); | |
725 | if (!(val & APIC_SPIV_APIC_ENABLED)) { | |
726 | int i; | |
727 | u32 lvt_val; | |
728 | ||
729 | for (i = 0; i < APIC_LVT_NUM; i++) { | |
730 | lvt_val = apic_get_reg(apic, | |
731 | APIC_LVTT + 0x10 * i); | |
732 | apic_set_reg(apic, APIC_LVTT + 0x10 * i, | |
733 | lvt_val | APIC_LVT_MASKED); | |
734 | } | |
d3c7b77d | 735 | atomic_set(&apic->lapic_timer.pending, 0); |
97222cc8 ED |
736 | |
737 | } | |
738 | break; | |
739 | ||
740 | case APIC_ICR: | |
741 | /* No delay here, so we always clear the pending bit */ | |
742 | apic_set_reg(apic, APIC_ICR, val & ~(1 << 12)); | |
743 | apic_send_ipi(apic); | |
744 | break; | |
745 | ||
746 | case APIC_ICR2: | |
747 | apic_set_reg(apic, APIC_ICR2, val & 0xff000000); | |
748 | break; | |
749 | ||
23930f95 | 750 | case APIC_LVT0: |
cc6e462c | 751 | apic_manage_nmi_watchdog(apic, val); |
97222cc8 ED |
752 | case APIC_LVTT: |
753 | case APIC_LVTTHMR: | |
754 | case APIC_LVTPC: | |
97222cc8 ED |
755 | case APIC_LVT1: |
756 | case APIC_LVTERR: | |
757 | /* TODO: Check vector */ | |
758 | if (!apic_sw_enabled(apic)) | |
759 | val |= APIC_LVT_MASKED; | |
760 | ||
761 | val &= apic_lvt_mask[(offset - APIC_LVTT) >> 4]; | |
762 | apic_set_reg(apic, offset, val); | |
763 | ||
764 | break; | |
765 | ||
766 | case APIC_TMICT: | |
d3c7b77d | 767 | hrtimer_cancel(&apic->lapic_timer.timer); |
97222cc8 ED |
768 | apic_set_reg(apic, APIC_TMICT, val); |
769 | start_apic_timer(apic); | |
770 | return; | |
771 | ||
772 | case APIC_TDCR: | |
773 | if (val & 4) | |
774 | printk(KERN_ERR "KVM_WRITE:TDCR %x\n", val); | |
775 | apic_set_reg(apic, APIC_TDCR, val); | |
776 | update_divide_count(apic); | |
777 | break; | |
778 | ||
779 | default: | |
780 | apic_debug("Local APIC Write to read-only register %x\n", | |
781 | offset); | |
782 | break; | |
783 | } | |
784 | ||
785 | } | |
786 | ||
92760499 LV |
787 | static int apic_mmio_range(struct kvm_io_device *this, gpa_t addr, |
788 | int len, int size) | |
97222cc8 ED |
789 | { |
790 | struct kvm_lapic *apic = (struct kvm_lapic *)this->private; | |
791 | int ret = 0; | |
792 | ||
793 | ||
794 | if (apic_hw_enabled(apic) && | |
795 | (addr >= apic->base_address) && | |
796 | (addr < (apic->base_address + LAPIC_MMIO_LENGTH))) | |
797 | ret = 1; | |
798 | ||
799 | return ret; | |
800 | } | |
801 | ||
d589444e | 802 | void kvm_free_lapic(struct kvm_vcpu *vcpu) |
97222cc8 | 803 | { |
ad312c7c | 804 | if (!vcpu->arch.apic) |
97222cc8 ED |
805 | return; |
806 | ||
d3c7b77d | 807 | hrtimer_cancel(&vcpu->arch.apic->lapic_timer.timer); |
97222cc8 | 808 | |
ad312c7c ZX |
809 | if (vcpu->arch.apic->regs_page) |
810 | __free_page(vcpu->arch.apic->regs_page); | |
97222cc8 | 811 | |
ad312c7c | 812 | kfree(vcpu->arch.apic); |
97222cc8 ED |
813 | } |
814 | ||
815 | /* | |
816 | *---------------------------------------------------------------------- | |
817 | * LAPIC interface | |
818 | *---------------------------------------------------------------------- | |
819 | */ | |
820 | ||
821 | void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8) | |
822 | { | |
ad312c7c | 823 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
824 | |
825 | if (!apic) | |
826 | return; | |
b93463aa AK |
827 | apic_set_tpr(apic, ((cr8 & 0x0f) << 4) |
828 | | (apic_get_reg(apic, APIC_TASKPRI) & 4)); | |
97222cc8 | 829 | } |
ec7cf690 | 830 | EXPORT_SYMBOL_GPL(kvm_lapic_set_tpr); |
97222cc8 ED |
831 | |
832 | u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu) | |
833 | { | |
ad312c7c | 834 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
835 | u64 tpr; |
836 | ||
837 | if (!apic) | |
838 | return 0; | |
839 | tpr = (u64) apic_get_reg(apic, APIC_TASKPRI); | |
840 | ||
841 | return (tpr & 0xf0) >> 4; | |
842 | } | |
6e5d865c | 843 | EXPORT_SYMBOL_GPL(kvm_lapic_get_cr8); |
97222cc8 ED |
844 | |
845 | void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value) | |
846 | { | |
ad312c7c | 847 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
848 | |
849 | if (!apic) { | |
850 | value |= MSR_IA32_APICBASE_BSP; | |
ad312c7c | 851 | vcpu->arch.apic_base = value; |
97222cc8 ED |
852 | return; |
853 | } | |
854 | if (apic->vcpu->vcpu_id) | |
855 | value &= ~MSR_IA32_APICBASE_BSP; | |
856 | ||
ad312c7c ZX |
857 | vcpu->arch.apic_base = value; |
858 | apic->base_address = apic->vcpu->arch.apic_base & | |
97222cc8 ED |
859 | MSR_IA32_APICBASE_BASE; |
860 | ||
861 | /* with FSB delivery interrupt, we can restart APIC functionality */ | |
862 | apic_debug("apic base msr is 0x%016" PRIx64 ", and base address is " | |
ad312c7c | 863 | "0x%lx.\n", apic->vcpu->arch.apic_base, apic->base_address); |
97222cc8 ED |
864 | |
865 | } | |
866 | ||
867 | u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu) | |
868 | { | |
ad312c7c | 869 | return vcpu->arch.apic_base; |
97222cc8 ED |
870 | } |
871 | EXPORT_SYMBOL_GPL(kvm_lapic_get_base); | |
872 | ||
c5ec1534 | 873 | void kvm_lapic_reset(struct kvm_vcpu *vcpu) |
97222cc8 ED |
874 | { |
875 | struct kvm_lapic *apic; | |
876 | int i; | |
877 | ||
b8688d51 | 878 | apic_debug("%s\n", __func__); |
97222cc8 ED |
879 | |
880 | ASSERT(vcpu); | |
ad312c7c | 881 | apic = vcpu->arch.apic; |
97222cc8 ED |
882 | ASSERT(apic != NULL); |
883 | ||
884 | /* Stop the timer in case it's a reset to an active apic */ | |
d3c7b77d | 885 | hrtimer_cancel(&apic->lapic_timer.timer); |
97222cc8 ED |
886 | |
887 | apic_set_reg(apic, APIC_ID, vcpu->vcpu_id << 24); | |
888 | apic_set_reg(apic, APIC_LVR, APIC_VERSION); | |
889 | ||
890 | for (i = 0; i < APIC_LVT_NUM; i++) | |
891 | apic_set_reg(apic, APIC_LVTT + 0x10 * i, APIC_LVT_MASKED); | |
40487c68 QH |
892 | apic_set_reg(apic, APIC_LVT0, |
893 | SET_APIC_DELIVERY_MODE(0, APIC_MODE_EXTINT)); | |
97222cc8 ED |
894 | |
895 | apic_set_reg(apic, APIC_DFR, 0xffffffffU); | |
896 | apic_set_reg(apic, APIC_SPIV, 0xff); | |
897 | apic_set_reg(apic, APIC_TASKPRI, 0); | |
898 | apic_set_reg(apic, APIC_LDR, 0); | |
899 | apic_set_reg(apic, APIC_ESR, 0); | |
900 | apic_set_reg(apic, APIC_ICR, 0); | |
901 | apic_set_reg(apic, APIC_ICR2, 0); | |
902 | apic_set_reg(apic, APIC_TDCR, 0); | |
903 | apic_set_reg(apic, APIC_TMICT, 0); | |
904 | for (i = 0; i < 8; i++) { | |
905 | apic_set_reg(apic, APIC_IRR + 0x10 * i, 0); | |
906 | apic_set_reg(apic, APIC_ISR + 0x10 * i, 0); | |
907 | apic_set_reg(apic, APIC_TMR + 0x10 * i, 0); | |
908 | } | |
b33ac88b | 909 | update_divide_count(apic); |
d3c7b77d | 910 | atomic_set(&apic->lapic_timer.pending, 0); |
97222cc8 | 911 | if (vcpu->vcpu_id == 0) |
ad312c7c | 912 | vcpu->arch.apic_base |= MSR_IA32_APICBASE_BSP; |
97222cc8 ED |
913 | apic_update_ppr(apic); |
914 | ||
915 | apic_debug(KERN_INFO "%s: vcpu=%p, id=%d, base_msr=" | |
b8688d51 | 916 | "0x%016" PRIx64 ", base_address=0x%0lx.\n", __func__, |
97222cc8 | 917 | vcpu, kvm_apic_id(apic), |
ad312c7c | 918 | vcpu->arch.apic_base, apic->base_address); |
97222cc8 | 919 | } |
c5ec1534 | 920 | EXPORT_SYMBOL_GPL(kvm_lapic_reset); |
97222cc8 ED |
921 | |
922 | int kvm_lapic_enabled(struct kvm_vcpu *vcpu) | |
923 | { | |
ad312c7c | 924 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
925 | int ret = 0; |
926 | ||
927 | if (!apic) | |
928 | return 0; | |
929 | ret = apic_enabled(apic); | |
930 | ||
931 | return ret; | |
932 | } | |
6e5d865c | 933 | EXPORT_SYMBOL_GPL(kvm_lapic_enabled); |
97222cc8 ED |
934 | |
935 | /* | |
936 | *---------------------------------------------------------------------- | |
937 | * timer interface | |
938 | *---------------------------------------------------------------------- | |
939 | */ | |
1b9778da | 940 | |
d3c7b77d | 941 | static bool lapic_is_periodic(struct kvm_timer *ktimer) |
97222cc8 | 942 | { |
d3c7b77d MT |
943 | struct kvm_lapic *apic = container_of(ktimer, struct kvm_lapic, |
944 | lapic_timer); | |
945 | return apic_lvtt_period(apic); | |
97222cc8 ED |
946 | } |
947 | ||
3d80840d MT |
948 | int apic_has_pending_timer(struct kvm_vcpu *vcpu) |
949 | { | |
950 | struct kvm_lapic *lapic = vcpu->arch.apic; | |
951 | ||
54aaacee | 952 | if (lapic && apic_enabled(lapic) && apic_lvt_enabled(lapic, APIC_LVTT)) |
d3c7b77d | 953 | return atomic_read(&lapic->lapic_timer.pending); |
3d80840d MT |
954 | |
955 | return 0; | |
956 | } | |
957 | ||
8fdb2351 | 958 | static int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type) |
1b9778da | 959 | { |
8fdb2351 | 960 | u32 reg = apic_get_reg(apic, lvt_type); |
23930f95 | 961 | int vector, mode, trig_mode; |
23930f95 | 962 | |
8fdb2351 | 963 | if (apic_hw_enabled(apic) && !(reg & APIC_LVT_MASKED)) { |
23930f95 JK |
964 | vector = reg & APIC_VECTOR_MASK; |
965 | mode = reg & APIC_MODE_MASK; | |
966 | trig_mode = reg & APIC_LVT_LEVEL_TRIGGER; | |
967 | return __apic_accept_irq(apic, mode, vector, 1, trig_mode); | |
968 | } | |
969 | return 0; | |
970 | } | |
1b9778da | 971 | |
8fdb2351 | 972 | void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu) |
23930f95 | 973 | { |
8fdb2351 JK |
974 | struct kvm_lapic *apic = vcpu->arch.apic; |
975 | ||
976 | if (apic) | |
977 | kvm_apic_local_deliver(apic, APIC_LVT0); | |
1b9778da ED |
978 | } |
979 | ||
d3c7b77d MT |
980 | struct kvm_timer_ops lapic_timer_ops = { |
981 | .is_periodic = lapic_is_periodic, | |
982 | }; | |
97222cc8 ED |
983 | |
984 | int kvm_create_lapic(struct kvm_vcpu *vcpu) | |
985 | { | |
986 | struct kvm_lapic *apic; | |
987 | ||
988 | ASSERT(vcpu != NULL); | |
989 | apic_debug("apic_init %d\n", vcpu->vcpu_id); | |
990 | ||
991 | apic = kzalloc(sizeof(*apic), GFP_KERNEL); | |
992 | if (!apic) | |
993 | goto nomem; | |
994 | ||
ad312c7c | 995 | vcpu->arch.apic = apic; |
97222cc8 ED |
996 | |
997 | apic->regs_page = alloc_page(GFP_KERNEL); | |
998 | if (apic->regs_page == NULL) { | |
999 | printk(KERN_ERR "malloc apic regs error for vcpu %x\n", | |
1000 | vcpu->vcpu_id); | |
d589444e | 1001 | goto nomem_free_apic; |
97222cc8 ED |
1002 | } |
1003 | apic->regs = page_address(apic->regs_page); | |
1004 | memset(apic->regs, 0, PAGE_SIZE); | |
1005 | apic->vcpu = vcpu; | |
1006 | ||
d3c7b77d MT |
1007 | hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC, |
1008 | HRTIMER_MODE_ABS); | |
1009 | apic->lapic_timer.timer.function = kvm_timer_fn; | |
1010 | apic->lapic_timer.t_ops = &lapic_timer_ops; | |
1011 | apic->lapic_timer.kvm = vcpu->kvm; | |
1012 | apic->lapic_timer.vcpu_id = vcpu->vcpu_id; | |
1013 | ||
97222cc8 | 1014 | apic->base_address = APIC_DEFAULT_PHYS_BASE; |
ad312c7c | 1015 | vcpu->arch.apic_base = APIC_DEFAULT_PHYS_BASE; |
97222cc8 | 1016 | |
c5ec1534 | 1017 | kvm_lapic_reset(vcpu); |
97222cc8 ED |
1018 | apic->dev.read = apic_mmio_read; |
1019 | apic->dev.write = apic_mmio_write; | |
1020 | apic->dev.in_range = apic_mmio_range; | |
1021 | apic->dev.private = apic; | |
1022 | ||
1023 | return 0; | |
d589444e RR |
1024 | nomem_free_apic: |
1025 | kfree(apic); | |
97222cc8 | 1026 | nomem: |
97222cc8 ED |
1027 | return -ENOMEM; |
1028 | } | |
1029 | EXPORT_SYMBOL_GPL(kvm_create_lapic); | |
1030 | ||
1031 | int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu) | |
1032 | { | |
ad312c7c | 1033 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
1034 | int highest_irr; |
1035 | ||
1036 | if (!apic || !apic_enabled(apic)) | |
1037 | return -1; | |
1038 | ||
6e5d865c | 1039 | apic_update_ppr(apic); |
97222cc8 ED |
1040 | highest_irr = apic_find_highest_irr(apic); |
1041 | if ((highest_irr == -1) || | |
1042 | ((highest_irr & 0xF0) <= apic_get_reg(apic, APIC_PROCPRI))) | |
1043 | return -1; | |
1044 | return highest_irr; | |
1045 | } | |
1046 | ||
40487c68 QH |
1047 | int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu) |
1048 | { | |
ad312c7c | 1049 | u32 lvt0 = apic_get_reg(vcpu->arch.apic, APIC_LVT0); |
40487c68 QH |
1050 | int r = 0; |
1051 | ||
1052 | if (vcpu->vcpu_id == 0) { | |
ad312c7c | 1053 | if (!apic_hw_enabled(vcpu->arch.apic)) |
40487c68 QH |
1054 | r = 1; |
1055 | if ((lvt0 & APIC_LVT_MASKED) == 0 && | |
1056 | GET_APIC_DELIVERY_MODE(lvt0) == APIC_MODE_EXTINT) | |
1057 | r = 1; | |
1058 | } | |
1059 | return r; | |
1060 | } | |
1061 | ||
1b9778da ED |
1062 | void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu) |
1063 | { | |
ad312c7c | 1064 | struct kvm_lapic *apic = vcpu->arch.apic; |
1b9778da | 1065 | |
d3c7b77d | 1066 | if (apic && atomic_read(&apic->lapic_timer.pending) > 0) { |
8fdb2351 | 1067 | if (kvm_apic_local_deliver(apic, APIC_LVTT)) |
d3c7b77d | 1068 | atomic_dec(&apic->lapic_timer.pending); |
1b9778da ED |
1069 | } |
1070 | } | |
1071 | ||
97222cc8 ED |
1072 | int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu) |
1073 | { | |
1074 | int vector = kvm_apic_has_interrupt(vcpu); | |
ad312c7c | 1075 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
1076 | |
1077 | if (vector == -1) | |
1078 | return -1; | |
1079 | ||
1080 | apic_set_vector(vector, apic->regs + APIC_ISR); | |
1081 | apic_update_ppr(apic); | |
1082 | apic_clear_irr(vector, apic); | |
1083 | return vector; | |
1084 | } | |
96ad2cc6 ED |
1085 | |
1086 | void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu) | |
1087 | { | |
ad312c7c | 1088 | struct kvm_lapic *apic = vcpu->arch.apic; |
96ad2cc6 | 1089 | |
ad312c7c | 1090 | apic->base_address = vcpu->arch.apic_base & |
96ad2cc6 ED |
1091 | MSR_IA32_APICBASE_BASE; |
1092 | apic_set_reg(apic, APIC_LVR, APIC_VERSION); | |
1093 | apic_update_ppr(apic); | |
d3c7b77d | 1094 | hrtimer_cancel(&apic->lapic_timer.timer); |
96ad2cc6 ED |
1095 | update_divide_count(apic); |
1096 | start_apic_timer(apic); | |
1097 | } | |
a3d7f85f | 1098 | |
2f52d58c | 1099 | void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) |
a3d7f85f | 1100 | { |
ad312c7c | 1101 | struct kvm_lapic *apic = vcpu->arch.apic; |
a3d7f85f ED |
1102 | struct hrtimer *timer; |
1103 | ||
1104 | if (!apic) | |
1105 | return; | |
1106 | ||
d3c7b77d | 1107 | timer = &apic->lapic_timer.timer; |
a3d7f85f | 1108 | if (hrtimer_cancel(timer)) |
beb20d52 | 1109 | hrtimer_start_expires(timer, HRTIMER_MODE_ABS); |
a3d7f85f | 1110 | } |
b93463aa AK |
1111 | |
1112 | void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu) | |
1113 | { | |
1114 | u32 data; | |
1115 | void *vapic; | |
1116 | ||
1117 | if (!irqchip_in_kernel(vcpu->kvm) || !vcpu->arch.apic->vapic_addr) | |
1118 | return; | |
1119 | ||
1120 | vapic = kmap_atomic(vcpu->arch.apic->vapic_page, KM_USER0); | |
1121 | data = *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr)); | |
1122 | kunmap_atomic(vapic, KM_USER0); | |
1123 | ||
1124 | apic_set_tpr(vcpu->arch.apic, data & 0xff); | |
1125 | } | |
1126 | ||
1127 | void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu) | |
1128 | { | |
1129 | u32 data, tpr; | |
1130 | int max_irr, max_isr; | |
1131 | struct kvm_lapic *apic; | |
1132 | void *vapic; | |
1133 | ||
1134 | if (!irqchip_in_kernel(vcpu->kvm) || !vcpu->arch.apic->vapic_addr) | |
1135 | return; | |
1136 | ||
1137 | apic = vcpu->arch.apic; | |
1138 | tpr = apic_get_reg(apic, APIC_TASKPRI) & 0xff; | |
1139 | max_irr = apic_find_highest_irr(apic); | |
1140 | if (max_irr < 0) | |
1141 | max_irr = 0; | |
1142 | max_isr = apic_find_highest_isr(apic); | |
1143 | if (max_isr < 0) | |
1144 | max_isr = 0; | |
1145 | data = (tpr & 0xff) | ((max_isr & 0xf0) << 8) | (max_irr << 24); | |
1146 | ||
1147 | vapic = kmap_atomic(vcpu->arch.apic->vapic_page, KM_USER0); | |
1148 | *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr)) = data; | |
1149 | kunmap_atomic(vapic, KM_USER0); | |
1150 | } | |
1151 | ||
1152 | void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr) | |
1153 | { | |
1154 | if (!irqchip_in_kernel(vcpu->kvm)) | |
1155 | return; | |
1156 | ||
1157 | vcpu->arch.apic->vapic_addr = vapic_addr; | |
1158 | } |