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Commit | Line | Data |
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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 | ||
6da7e3f6 GN |
199 | static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, |
200 | int vector, int level, int trig_mode); | |
201 | ||
58c2dde1 | 202 | int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq) |
97222cc8 | 203 | { |
ad312c7c | 204 | struct kvm_lapic *apic = vcpu->arch.apic; |
8be5453f | 205 | |
58c2dde1 GN |
206 | return __apic_accept_irq(apic, irq->delivery_mode, irq->vector, |
207 | irq->level, irq->trig_mode); | |
97222cc8 ED |
208 | } |
209 | ||
210 | static inline int apic_find_highest_isr(struct kvm_lapic *apic) | |
211 | { | |
212 | int result; | |
213 | ||
214 | result = find_highest_vector(apic->regs + APIC_ISR); | |
215 | ASSERT(result == -1 || result >= 16); | |
216 | ||
217 | return result; | |
218 | } | |
219 | ||
220 | static void apic_update_ppr(struct kvm_lapic *apic) | |
221 | { | |
222 | u32 tpr, isrv, ppr; | |
223 | int isr; | |
224 | ||
225 | tpr = apic_get_reg(apic, APIC_TASKPRI); | |
226 | isr = apic_find_highest_isr(apic); | |
227 | isrv = (isr != -1) ? isr : 0; | |
228 | ||
229 | if ((tpr & 0xf0) >= (isrv & 0xf0)) | |
230 | ppr = tpr & 0xff; | |
231 | else | |
232 | ppr = isrv & 0xf0; | |
233 | ||
234 | apic_debug("vlapic %p, ppr 0x%x, isr 0x%x, isrv 0x%x", | |
235 | apic, ppr, isr, isrv); | |
236 | ||
237 | apic_set_reg(apic, APIC_PROCPRI, ppr); | |
238 | } | |
239 | ||
240 | static void apic_set_tpr(struct kvm_lapic *apic, u32 tpr) | |
241 | { | |
242 | apic_set_reg(apic, APIC_TASKPRI, tpr); | |
243 | apic_update_ppr(apic); | |
244 | } | |
245 | ||
246 | int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest) | |
247 | { | |
343f94fe | 248 | return dest == 0xff || kvm_apic_id(apic) == dest; |
97222cc8 ED |
249 | } |
250 | ||
251 | int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda) | |
252 | { | |
253 | int result = 0; | |
254 | u8 logical_id; | |
255 | ||
256 | logical_id = GET_APIC_LOGICAL_ID(apic_get_reg(apic, APIC_LDR)); | |
257 | ||
258 | switch (apic_get_reg(apic, APIC_DFR)) { | |
259 | case APIC_DFR_FLAT: | |
260 | if (logical_id & mda) | |
261 | result = 1; | |
262 | break; | |
263 | case APIC_DFR_CLUSTER: | |
264 | if (((logical_id >> 4) == (mda >> 0x4)) | |
265 | && (logical_id & mda & 0xf)) | |
266 | result = 1; | |
267 | break; | |
268 | default: | |
269 | printk(KERN_WARNING "Bad DFR vcpu %d: %08x\n", | |
270 | apic->vcpu->vcpu_id, apic_get_reg(apic, APIC_DFR)); | |
271 | break; | |
272 | } | |
273 | ||
274 | return result; | |
275 | } | |
276 | ||
343f94fe | 277 | int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, |
97222cc8 ED |
278 | int short_hand, int dest, int dest_mode) |
279 | { | |
280 | int result = 0; | |
ad312c7c | 281 | struct kvm_lapic *target = vcpu->arch.apic; |
97222cc8 ED |
282 | |
283 | apic_debug("target %p, source %p, dest 0x%x, " | |
343f94fe | 284 | "dest_mode 0x%x, short_hand 0x%x\n", |
97222cc8 ED |
285 | target, source, dest, dest_mode, short_hand); |
286 | ||
287 | ASSERT(!target); | |
288 | switch (short_hand) { | |
289 | case APIC_DEST_NOSHORT: | |
343f94fe | 290 | if (dest_mode == 0) |
97222cc8 | 291 | /* Physical mode. */ |
343f94fe GN |
292 | result = kvm_apic_match_physical_addr(target, dest); |
293 | else | |
97222cc8 ED |
294 | /* Logical mode. */ |
295 | result = kvm_apic_match_logical_addr(target, dest); | |
296 | break; | |
297 | case APIC_DEST_SELF: | |
343f94fe | 298 | result = (target == source); |
97222cc8 ED |
299 | break; |
300 | case APIC_DEST_ALLINC: | |
301 | result = 1; | |
302 | break; | |
303 | case APIC_DEST_ALLBUT: | |
343f94fe | 304 | result = (target != source); |
97222cc8 ED |
305 | break; |
306 | default: | |
307 | printk(KERN_WARNING "Bad dest shorthand value %x\n", | |
308 | short_hand); | |
309 | break; | |
310 | } | |
311 | ||
312 | return result; | |
313 | } | |
314 | ||
315 | /* | |
316 | * Add a pending IRQ into lapic. | |
317 | * Return 1 if successfully added and 0 if discarded. | |
318 | */ | |
319 | static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, | |
320 | int vector, int level, int trig_mode) | |
321 | { | |
6da7e3f6 | 322 | int result = 0; |
c5ec1534 | 323 | struct kvm_vcpu *vcpu = apic->vcpu; |
97222cc8 ED |
324 | |
325 | switch (delivery_mode) { | |
97222cc8 | 326 | case APIC_DM_LOWEST: |
e1035715 GN |
327 | vcpu->arch.apic_arb_prio++; |
328 | case APIC_DM_FIXED: | |
97222cc8 ED |
329 | /* FIXME add logic for vcpu on reset */ |
330 | if (unlikely(!apic_enabled(apic))) | |
331 | break; | |
332 | ||
6da7e3f6 GN |
333 | result = !apic_test_and_set_irr(vector, apic); |
334 | if (!result) { | |
335 | if (trig_mode) | |
336 | apic_debug("level trig mode repeatedly for " | |
337 | "vector %d", vector); | |
97222cc8 ED |
338 | break; |
339 | } | |
340 | ||
341 | if (trig_mode) { | |
342 | apic_debug("level trig mode for vector %d", vector); | |
343 | apic_set_vector(vector, apic->regs + APIC_TMR); | |
344 | } else | |
345 | apic_clear_vector(vector, apic->regs + APIC_TMR); | |
d7690175 | 346 | kvm_vcpu_kick(vcpu); |
97222cc8 ED |
347 | break; |
348 | ||
349 | case APIC_DM_REMRD: | |
350 | printk(KERN_DEBUG "Ignoring delivery mode 3\n"); | |
351 | break; | |
352 | ||
353 | case APIC_DM_SMI: | |
354 | printk(KERN_DEBUG "Ignoring guest SMI\n"); | |
355 | break; | |
3419ffc8 | 356 | |
97222cc8 | 357 | case APIC_DM_NMI: |
6da7e3f6 | 358 | result = 1; |
3419ffc8 | 359 | kvm_inject_nmi(vcpu); |
26df99c6 | 360 | kvm_vcpu_kick(vcpu); |
97222cc8 ED |
361 | break; |
362 | ||
363 | case APIC_DM_INIT: | |
c5ec1534 | 364 | if (level) { |
6da7e3f6 | 365 | result = 1; |
a4535290 | 366 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
c5ec1534 HQ |
367 | printk(KERN_DEBUG |
368 | "INIT on a runnable vcpu %d\n", | |
369 | vcpu->vcpu_id); | |
a4535290 | 370 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; |
c5ec1534 HQ |
371 | kvm_vcpu_kick(vcpu); |
372 | } else { | |
1b10bf31 JK |
373 | apic_debug("Ignoring de-assert INIT to vcpu %d\n", |
374 | vcpu->vcpu_id); | |
c5ec1534 | 375 | } |
97222cc8 ED |
376 | break; |
377 | ||
378 | case APIC_DM_STARTUP: | |
1b10bf31 JK |
379 | apic_debug("SIPI to vcpu %d vector 0x%02x\n", |
380 | vcpu->vcpu_id, vector); | |
a4535290 | 381 | if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { |
6da7e3f6 | 382 | result = 1; |
ad312c7c | 383 | vcpu->arch.sipi_vector = vector; |
a4535290 | 384 | vcpu->arch.mp_state = KVM_MP_STATE_SIPI_RECEIVED; |
d7690175 | 385 | kvm_vcpu_kick(vcpu); |
c5ec1534 | 386 | } |
97222cc8 ED |
387 | break; |
388 | ||
23930f95 JK |
389 | case APIC_DM_EXTINT: |
390 | /* | |
391 | * Should only be called by kvm_apic_local_deliver() with LVT0, | |
392 | * before NMI watchdog was enabled. Already handled by | |
393 | * kvm_apic_accept_pic_intr(). | |
394 | */ | |
395 | break; | |
396 | ||
97222cc8 ED |
397 | default: |
398 | printk(KERN_ERR "TODO: unsupported delivery mode %x\n", | |
399 | delivery_mode); | |
400 | break; | |
401 | } | |
402 | return result; | |
403 | } | |
404 | ||
e1035715 | 405 | int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2) |
8be5453f | 406 | { |
e1035715 | 407 | return vcpu1->arch.apic_arb_prio - vcpu2->arch.apic_arb_prio; |
8be5453f ZX |
408 | } |
409 | ||
97222cc8 ED |
410 | static void apic_set_eoi(struct kvm_lapic *apic) |
411 | { | |
412 | int vector = apic_find_highest_isr(apic); | |
f5244726 | 413 | int trigger_mode; |
97222cc8 ED |
414 | /* |
415 | * Not every write EOI will has corresponding ISR, | |
416 | * one example is when Kernel check timer on setup_IO_APIC | |
417 | */ | |
418 | if (vector == -1) | |
419 | return; | |
420 | ||
421 | apic_clear_vector(vector, apic->regs + APIC_ISR); | |
422 | apic_update_ppr(apic); | |
423 | ||
424 | if (apic_test_and_clear_vector(vector, apic->regs + APIC_TMR)) | |
f5244726 MT |
425 | trigger_mode = IOAPIC_LEVEL_TRIG; |
426 | else | |
427 | trigger_mode = IOAPIC_EDGE_TRIG; | |
428 | kvm_ioapic_update_eoi(apic->vcpu->kvm, vector, trigger_mode); | |
97222cc8 ED |
429 | } |
430 | ||
431 | static void apic_send_ipi(struct kvm_lapic *apic) | |
432 | { | |
433 | u32 icr_low = apic_get_reg(apic, APIC_ICR); | |
434 | u32 icr_high = apic_get_reg(apic, APIC_ICR2); | |
58c2dde1 | 435 | struct kvm_lapic_irq irq; |
97222cc8 | 436 | |
58c2dde1 GN |
437 | irq.vector = icr_low & APIC_VECTOR_MASK; |
438 | irq.delivery_mode = icr_low & APIC_MODE_MASK; | |
439 | irq.dest_mode = icr_low & APIC_DEST_MASK; | |
440 | irq.level = icr_low & APIC_INT_ASSERT; | |
441 | irq.trig_mode = icr_low & APIC_INT_LEVELTRIG; | |
442 | irq.shorthand = icr_low & APIC_SHORT_MASK; | |
443 | irq.dest_id = GET_APIC_DEST_FIELD(icr_high); | |
97222cc8 ED |
444 | |
445 | apic_debug("icr_high 0x%x, icr_low 0x%x, " | |
446 | "short_hand 0x%x, dest 0x%x, trig_mode 0x%x, level 0x%x, " | |
447 | "dest_mode 0x%x, delivery_mode 0x%x, vector 0x%x\n", | |
9b5843dd | 448 | icr_high, icr_low, irq.shorthand, irq.dest_id, |
58c2dde1 GN |
449 | irq.trig_mode, irq.level, irq.dest_mode, irq.delivery_mode, |
450 | irq.vector); | |
451 | ||
452 | kvm_irq_delivery_to_apic(apic->vcpu->kvm, apic, &irq); | |
97222cc8 ED |
453 | } |
454 | ||
455 | static u32 apic_get_tmcct(struct kvm_lapic *apic) | |
456 | { | |
b682b814 MT |
457 | ktime_t remaining; |
458 | s64 ns; | |
9da8f4e8 | 459 | u32 tmcct; |
97222cc8 ED |
460 | |
461 | ASSERT(apic != NULL); | |
462 | ||
9da8f4e8 | 463 | /* if initial count is 0, current count should also be 0 */ |
b682b814 | 464 | if (apic_get_reg(apic, APIC_TMICT) == 0) |
9da8f4e8 KP |
465 | return 0; |
466 | ||
d3c7b77d | 467 | remaining = hrtimer_expires_remaining(&apic->lapic_timer.timer); |
b682b814 MT |
468 | if (ktime_to_ns(remaining) < 0) |
469 | remaining = ktime_set(0, 0); | |
470 | ||
d3c7b77d MT |
471 | ns = mod_64(ktime_to_ns(remaining), apic->lapic_timer.period); |
472 | tmcct = div64_u64(ns, | |
473 | (APIC_BUS_CYCLE_NS * apic->divide_count)); | |
97222cc8 ED |
474 | |
475 | return tmcct; | |
476 | } | |
477 | ||
b209749f AK |
478 | static void __report_tpr_access(struct kvm_lapic *apic, bool write) |
479 | { | |
480 | struct kvm_vcpu *vcpu = apic->vcpu; | |
481 | struct kvm_run *run = vcpu->run; | |
482 | ||
483 | set_bit(KVM_REQ_REPORT_TPR_ACCESS, &vcpu->requests); | |
5fdbf976 | 484 | run->tpr_access.rip = kvm_rip_read(vcpu); |
b209749f AK |
485 | run->tpr_access.is_write = write; |
486 | } | |
487 | ||
488 | static inline void report_tpr_access(struct kvm_lapic *apic, bool write) | |
489 | { | |
490 | if (apic->vcpu->arch.tpr_access_reporting) | |
491 | __report_tpr_access(apic, write); | |
492 | } | |
493 | ||
97222cc8 ED |
494 | static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset) |
495 | { | |
496 | u32 val = 0; | |
497 | ||
c7bf23ba JR |
498 | KVMTRACE_1D(APIC_ACCESS, apic->vcpu, (u32)offset, handler); |
499 | ||
97222cc8 ED |
500 | if (offset >= LAPIC_MMIO_LENGTH) |
501 | return 0; | |
502 | ||
503 | switch (offset) { | |
504 | case APIC_ARBPRI: | |
505 | printk(KERN_WARNING "Access APIC ARBPRI register " | |
506 | "which is for P6\n"); | |
507 | break; | |
508 | ||
509 | case APIC_TMCCT: /* Timer CCR */ | |
510 | val = apic_get_tmcct(apic); | |
511 | break; | |
512 | ||
b209749f AK |
513 | case APIC_TASKPRI: |
514 | report_tpr_access(apic, false); | |
515 | /* fall thru */ | |
97222cc8 | 516 | default: |
6e5d865c | 517 | apic_update_ppr(apic); |
97222cc8 ED |
518 | val = apic_get_reg(apic, offset); |
519 | break; | |
520 | } | |
521 | ||
522 | return val; | |
523 | } | |
524 | ||
525 | static void apic_mmio_read(struct kvm_io_device *this, | |
526 | gpa_t address, int len, void *data) | |
527 | { | |
528 | struct kvm_lapic *apic = (struct kvm_lapic *)this->private; | |
529 | unsigned int offset = address - apic->base_address; | |
530 | unsigned char alignment = offset & 0xf; | |
531 | u32 result; | |
532 | ||
533 | if ((alignment + len) > 4) { | |
534 | printk(KERN_ERR "KVM_APIC_READ: alignment error %lx %d", | |
535 | (unsigned long)address, len); | |
536 | return; | |
537 | } | |
538 | result = __apic_read(apic, offset & ~0xf); | |
539 | ||
540 | switch (len) { | |
541 | case 1: | |
542 | case 2: | |
543 | case 4: | |
544 | memcpy(data, (char *)&result + alignment, len); | |
545 | break; | |
546 | default: | |
547 | printk(KERN_ERR "Local APIC read with len = %x, " | |
548 | "should be 1,2, or 4 instead\n", len); | |
549 | break; | |
550 | } | |
551 | } | |
552 | ||
553 | static void update_divide_count(struct kvm_lapic *apic) | |
554 | { | |
555 | u32 tmp1, tmp2, tdcr; | |
556 | ||
557 | tdcr = apic_get_reg(apic, APIC_TDCR); | |
558 | tmp1 = tdcr & 0xf; | |
559 | tmp2 = ((tmp1 & 0x3) | ((tmp1 & 0x8) >> 1)) + 1; | |
d3c7b77d | 560 | apic->divide_count = 0x1 << (tmp2 & 0x7); |
97222cc8 ED |
561 | |
562 | apic_debug("timer divide count is 0x%x\n", | |
9b5843dd | 563 | apic->divide_count); |
97222cc8 ED |
564 | } |
565 | ||
566 | static void start_apic_timer(struct kvm_lapic *apic) | |
567 | { | |
d3c7b77d | 568 | ktime_t now = apic->lapic_timer.timer.base->get_time(); |
97222cc8 | 569 | |
d3c7b77d MT |
570 | apic->lapic_timer.period = apic_get_reg(apic, APIC_TMICT) * |
571 | APIC_BUS_CYCLE_NS * apic->divide_count; | |
572 | atomic_set(&apic->lapic_timer.pending, 0); | |
0b975a3c | 573 | |
d3c7b77d | 574 | if (!apic->lapic_timer.period) |
0b975a3c AK |
575 | return; |
576 | ||
d3c7b77d MT |
577 | hrtimer_start(&apic->lapic_timer.timer, |
578 | ktime_add_ns(now, apic->lapic_timer.period), | |
97222cc8 ED |
579 | HRTIMER_MODE_ABS); |
580 | ||
581 | apic_debug("%s: bus cycle is %" PRId64 "ns, now 0x%016" | |
582 | PRIx64 ", " | |
583 | "timer initial count 0x%x, period %lldns, " | |
b8688d51 | 584 | "expire @ 0x%016" PRIx64 ".\n", __func__, |
97222cc8 ED |
585 | APIC_BUS_CYCLE_NS, ktime_to_ns(now), |
586 | apic_get_reg(apic, APIC_TMICT), | |
d3c7b77d | 587 | apic->lapic_timer.period, |
97222cc8 | 588 | ktime_to_ns(ktime_add_ns(now, |
d3c7b77d | 589 | apic->lapic_timer.period))); |
97222cc8 ED |
590 | } |
591 | ||
cc6e462c JK |
592 | static void apic_manage_nmi_watchdog(struct kvm_lapic *apic, u32 lvt0_val) |
593 | { | |
594 | int nmi_wd_enabled = apic_lvt_nmi_mode(apic_get_reg(apic, APIC_LVT0)); | |
595 | ||
596 | if (apic_lvt_nmi_mode(lvt0_val)) { | |
597 | if (!nmi_wd_enabled) { | |
598 | apic_debug("Receive NMI setting on APIC_LVT0 " | |
599 | "for cpu %d\n", apic->vcpu->vcpu_id); | |
600 | apic->vcpu->kvm->arch.vapics_in_nmi_mode++; | |
601 | } | |
602 | } else if (nmi_wd_enabled) | |
603 | apic->vcpu->kvm->arch.vapics_in_nmi_mode--; | |
604 | } | |
605 | ||
97222cc8 ED |
606 | static void apic_mmio_write(struct kvm_io_device *this, |
607 | gpa_t address, int len, const void *data) | |
608 | { | |
609 | struct kvm_lapic *apic = (struct kvm_lapic *)this->private; | |
610 | unsigned int offset = address - apic->base_address; | |
611 | unsigned char alignment = offset & 0xf; | |
612 | u32 val; | |
613 | ||
614 | /* | |
615 | * APIC register must be aligned on 128-bits boundary. | |
616 | * 32/64/128 bits registers must be accessed thru 32 bits. | |
617 | * Refer SDM 8.4.1 | |
618 | */ | |
619 | if (len != 4 || alignment) { | |
1b10bf31 JK |
620 | /* Don't shout loud, $infamous_os would cause only noise. */ |
621 | apic_debug("apic write: bad size=%d %lx\n", | |
622 | len, (long)address); | |
97222cc8 ED |
623 | return; |
624 | } | |
625 | ||
626 | val = *(u32 *) data; | |
627 | ||
628 | /* too common printing */ | |
629 | if (offset != APIC_EOI) | |
630 | apic_debug("%s: offset 0x%x with length 0x%x, and value is " | |
b8688d51 | 631 | "0x%x\n", __func__, offset, len, val); |
97222cc8 ED |
632 | |
633 | offset &= 0xff0; | |
634 | ||
c7bf23ba JR |
635 | KVMTRACE_1D(APIC_ACCESS, apic->vcpu, (u32)offset, handler); |
636 | ||
97222cc8 ED |
637 | switch (offset) { |
638 | case APIC_ID: /* Local APIC ID */ | |
639 | apic_set_reg(apic, APIC_ID, val); | |
640 | break; | |
641 | ||
642 | case APIC_TASKPRI: | |
b209749f | 643 | report_tpr_access(apic, true); |
97222cc8 ED |
644 | apic_set_tpr(apic, val & 0xff); |
645 | break; | |
646 | ||
647 | case APIC_EOI: | |
648 | apic_set_eoi(apic); | |
649 | break; | |
650 | ||
651 | case APIC_LDR: | |
652 | apic_set_reg(apic, APIC_LDR, val & APIC_LDR_MASK); | |
653 | break; | |
654 | ||
655 | case APIC_DFR: | |
656 | apic_set_reg(apic, APIC_DFR, val | 0x0FFFFFFF); | |
657 | break; | |
658 | ||
659 | case APIC_SPIV: | |
660 | apic_set_reg(apic, APIC_SPIV, val & 0x3ff); | |
661 | if (!(val & APIC_SPIV_APIC_ENABLED)) { | |
662 | int i; | |
663 | u32 lvt_val; | |
664 | ||
665 | for (i = 0; i < APIC_LVT_NUM; i++) { | |
666 | lvt_val = apic_get_reg(apic, | |
667 | APIC_LVTT + 0x10 * i); | |
668 | apic_set_reg(apic, APIC_LVTT + 0x10 * i, | |
669 | lvt_val | APIC_LVT_MASKED); | |
670 | } | |
d3c7b77d | 671 | atomic_set(&apic->lapic_timer.pending, 0); |
97222cc8 ED |
672 | |
673 | } | |
674 | break; | |
675 | ||
676 | case APIC_ICR: | |
677 | /* No delay here, so we always clear the pending bit */ | |
678 | apic_set_reg(apic, APIC_ICR, val & ~(1 << 12)); | |
679 | apic_send_ipi(apic); | |
680 | break; | |
681 | ||
682 | case APIC_ICR2: | |
683 | apic_set_reg(apic, APIC_ICR2, val & 0xff000000); | |
684 | break; | |
685 | ||
23930f95 | 686 | case APIC_LVT0: |
cc6e462c | 687 | apic_manage_nmi_watchdog(apic, val); |
97222cc8 ED |
688 | case APIC_LVTT: |
689 | case APIC_LVTTHMR: | |
690 | case APIC_LVTPC: | |
97222cc8 ED |
691 | case APIC_LVT1: |
692 | case APIC_LVTERR: | |
693 | /* TODO: Check vector */ | |
694 | if (!apic_sw_enabled(apic)) | |
695 | val |= APIC_LVT_MASKED; | |
696 | ||
697 | val &= apic_lvt_mask[(offset - APIC_LVTT) >> 4]; | |
698 | apic_set_reg(apic, offset, val); | |
699 | ||
700 | break; | |
701 | ||
702 | case APIC_TMICT: | |
d3c7b77d | 703 | hrtimer_cancel(&apic->lapic_timer.timer); |
97222cc8 ED |
704 | apic_set_reg(apic, APIC_TMICT, val); |
705 | start_apic_timer(apic); | |
706 | return; | |
707 | ||
708 | case APIC_TDCR: | |
709 | if (val & 4) | |
710 | printk(KERN_ERR "KVM_WRITE:TDCR %x\n", val); | |
711 | apic_set_reg(apic, APIC_TDCR, val); | |
712 | update_divide_count(apic); | |
713 | break; | |
714 | ||
715 | default: | |
716 | apic_debug("Local APIC Write to read-only register %x\n", | |
717 | offset); | |
718 | break; | |
719 | } | |
720 | ||
721 | } | |
722 | ||
92760499 LV |
723 | static int apic_mmio_range(struct kvm_io_device *this, gpa_t addr, |
724 | int len, int size) | |
97222cc8 ED |
725 | { |
726 | struct kvm_lapic *apic = (struct kvm_lapic *)this->private; | |
727 | int ret = 0; | |
728 | ||
729 | ||
730 | if (apic_hw_enabled(apic) && | |
731 | (addr >= apic->base_address) && | |
732 | (addr < (apic->base_address + LAPIC_MMIO_LENGTH))) | |
733 | ret = 1; | |
734 | ||
735 | return ret; | |
736 | } | |
737 | ||
d589444e | 738 | void kvm_free_lapic(struct kvm_vcpu *vcpu) |
97222cc8 | 739 | { |
ad312c7c | 740 | if (!vcpu->arch.apic) |
97222cc8 ED |
741 | return; |
742 | ||
d3c7b77d | 743 | hrtimer_cancel(&vcpu->arch.apic->lapic_timer.timer); |
97222cc8 | 744 | |
ad312c7c ZX |
745 | if (vcpu->arch.apic->regs_page) |
746 | __free_page(vcpu->arch.apic->regs_page); | |
97222cc8 | 747 | |
ad312c7c | 748 | kfree(vcpu->arch.apic); |
97222cc8 ED |
749 | } |
750 | ||
751 | /* | |
752 | *---------------------------------------------------------------------- | |
753 | * LAPIC interface | |
754 | *---------------------------------------------------------------------- | |
755 | */ | |
756 | ||
757 | void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8) | |
758 | { | |
ad312c7c | 759 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
760 | |
761 | if (!apic) | |
762 | return; | |
b93463aa AK |
763 | apic_set_tpr(apic, ((cr8 & 0x0f) << 4) |
764 | | (apic_get_reg(apic, APIC_TASKPRI) & 4)); | |
97222cc8 | 765 | } |
ec7cf690 | 766 | EXPORT_SYMBOL_GPL(kvm_lapic_set_tpr); |
97222cc8 ED |
767 | |
768 | u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu) | |
769 | { | |
ad312c7c | 770 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
771 | u64 tpr; |
772 | ||
773 | if (!apic) | |
774 | return 0; | |
775 | tpr = (u64) apic_get_reg(apic, APIC_TASKPRI); | |
776 | ||
777 | return (tpr & 0xf0) >> 4; | |
778 | } | |
6e5d865c | 779 | EXPORT_SYMBOL_GPL(kvm_lapic_get_cr8); |
97222cc8 ED |
780 | |
781 | void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value) | |
782 | { | |
ad312c7c | 783 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
784 | |
785 | if (!apic) { | |
786 | value |= MSR_IA32_APICBASE_BSP; | |
ad312c7c | 787 | vcpu->arch.apic_base = value; |
97222cc8 ED |
788 | return; |
789 | } | |
790 | if (apic->vcpu->vcpu_id) | |
791 | value &= ~MSR_IA32_APICBASE_BSP; | |
792 | ||
ad312c7c ZX |
793 | vcpu->arch.apic_base = value; |
794 | apic->base_address = apic->vcpu->arch.apic_base & | |
97222cc8 ED |
795 | MSR_IA32_APICBASE_BASE; |
796 | ||
797 | /* with FSB delivery interrupt, we can restart APIC functionality */ | |
798 | apic_debug("apic base msr is 0x%016" PRIx64 ", and base address is " | |
ad312c7c | 799 | "0x%lx.\n", apic->vcpu->arch.apic_base, apic->base_address); |
97222cc8 ED |
800 | |
801 | } | |
802 | ||
803 | u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu) | |
804 | { | |
ad312c7c | 805 | return vcpu->arch.apic_base; |
97222cc8 ED |
806 | } |
807 | EXPORT_SYMBOL_GPL(kvm_lapic_get_base); | |
808 | ||
c5ec1534 | 809 | void kvm_lapic_reset(struct kvm_vcpu *vcpu) |
97222cc8 ED |
810 | { |
811 | struct kvm_lapic *apic; | |
812 | int i; | |
813 | ||
b8688d51 | 814 | apic_debug("%s\n", __func__); |
97222cc8 ED |
815 | |
816 | ASSERT(vcpu); | |
ad312c7c | 817 | apic = vcpu->arch.apic; |
97222cc8 ED |
818 | ASSERT(apic != NULL); |
819 | ||
820 | /* Stop the timer in case it's a reset to an active apic */ | |
d3c7b77d | 821 | hrtimer_cancel(&apic->lapic_timer.timer); |
97222cc8 ED |
822 | |
823 | apic_set_reg(apic, APIC_ID, vcpu->vcpu_id << 24); | |
824 | apic_set_reg(apic, APIC_LVR, APIC_VERSION); | |
825 | ||
826 | for (i = 0; i < APIC_LVT_NUM; i++) | |
827 | apic_set_reg(apic, APIC_LVTT + 0x10 * i, APIC_LVT_MASKED); | |
40487c68 QH |
828 | apic_set_reg(apic, APIC_LVT0, |
829 | SET_APIC_DELIVERY_MODE(0, APIC_MODE_EXTINT)); | |
97222cc8 ED |
830 | |
831 | apic_set_reg(apic, APIC_DFR, 0xffffffffU); | |
832 | apic_set_reg(apic, APIC_SPIV, 0xff); | |
833 | apic_set_reg(apic, APIC_TASKPRI, 0); | |
834 | apic_set_reg(apic, APIC_LDR, 0); | |
835 | apic_set_reg(apic, APIC_ESR, 0); | |
836 | apic_set_reg(apic, APIC_ICR, 0); | |
837 | apic_set_reg(apic, APIC_ICR2, 0); | |
838 | apic_set_reg(apic, APIC_TDCR, 0); | |
839 | apic_set_reg(apic, APIC_TMICT, 0); | |
840 | for (i = 0; i < 8; i++) { | |
841 | apic_set_reg(apic, APIC_IRR + 0x10 * i, 0); | |
842 | apic_set_reg(apic, APIC_ISR + 0x10 * i, 0); | |
843 | apic_set_reg(apic, APIC_TMR + 0x10 * i, 0); | |
844 | } | |
b33ac88b | 845 | update_divide_count(apic); |
d3c7b77d | 846 | atomic_set(&apic->lapic_timer.pending, 0); |
97222cc8 | 847 | if (vcpu->vcpu_id == 0) |
ad312c7c | 848 | vcpu->arch.apic_base |= MSR_IA32_APICBASE_BSP; |
97222cc8 ED |
849 | apic_update_ppr(apic); |
850 | ||
e1035715 GN |
851 | vcpu->arch.apic_arb_prio = 0; |
852 | ||
97222cc8 | 853 | apic_debug(KERN_INFO "%s: vcpu=%p, id=%d, base_msr=" |
b8688d51 | 854 | "0x%016" PRIx64 ", base_address=0x%0lx.\n", __func__, |
97222cc8 | 855 | vcpu, kvm_apic_id(apic), |
ad312c7c | 856 | vcpu->arch.apic_base, apic->base_address); |
97222cc8 | 857 | } |
c5ec1534 | 858 | EXPORT_SYMBOL_GPL(kvm_lapic_reset); |
97222cc8 | 859 | |
343f94fe | 860 | bool kvm_apic_present(struct kvm_vcpu *vcpu) |
97222cc8 | 861 | { |
343f94fe GN |
862 | return vcpu->arch.apic && apic_hw_enabled(vcpu->arch.apic); |
863 | } | |
97222cc8 | 864 | |
343f94fe GN |
865 | int kvm_lapic_enabled(struct kvm_vcpu *vcpu) |
866 | { | |
867 | return kvm_apic_present(vcpu) && apic_sw_enabled(vcpu->arch.apic); | |
97222cc8 | 868 | } |
6e5d865c | 869 | EXPORT_SYMBOL_GPL(kvm_lapic_enabled); |
97222cc8 ED |
870 | |
871 | /* | |
872 | *---------------------------------------------------------------------- | |
873 | * timer interface | |
874 | *---------------------------------------------------------------------- | |
875 | */ | |
1b9778da | 876 | |
d3c7b77d | 877 | static bool lapic_is_periodic(struct kvm_timer *ktimer) |
97222cc8 | 878 | { |
d3c7b77d MT |
879 | struct kvm_lapic *apic = container_of(ktimer, struct kvm_lapic, |
880 | lapic_timer); | |
881 | return apic_lvtt_period(apic); | |
97222cc8 ED |
882 | } |
883 | ||
3d80840d MT |
884 | int apic_has_pending_timer(struct kvm_vcpu *vcpu) |
885 | { | |
886 | struct kvm_lapic *lapic = vcpu->arch.apic; | |
887 | ||
54aaacee | 888 | if (lapic && apic_enabled(lapic) && apic_lvt_enabled(lapic, APIC_LVTT)) |
d3c7b77d | 889 | return atomic_read(&lapic->lapic_timer.pending); |
3d80840d MT |
890 | |
891 | return 0; | |
892 | } | |
893 | ||
8fdb2351 | 894 | static int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type) |
1b9778da | 895 | { |
8fdb2351 | 896 | u32 reg = apic_get_reg(apic, lvt_type); |
23930f95 | 897 | int vector, mode, trig_mode; |
23930f95 | 898 | |
8fdb2351 | 899 | if (apic_hw_enabled(apic) && !(reg & APIC_LVT_MASKED)) { |
23930f95 JK |
900 | vector = reg & APIC_VECTOR_MASK; |
901 | mode = reg & APIC_MODE_MASK; | |
902 | trig_mode = reg & APIC_LVT_LEVEL_TRIGGER; | |
903 | return __apic_accept_irq(apic, mode, vector, 1, trig_mode); | |
904 | } | |
905 | return 0; | |
906 | } | |
1b9778da | 907 | |
8fdb2351 | 908 | void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu) |
23930f95 | 909 | { |
8fdb2351 JK |
910 | struct kvm_lapic *apic = vcpu->arch.apic; |
911 | ||
912 | if (apic) | |
913 | kvm_apic_local_deliver(apic, APIC_LVT0); | |
1b9778da ED |
914 | } |
915 | ||
386eb6e8 | 916 | static struct kvm_timer_ops lapic_timer_ops = { |
d3c7b77d MT |
917 | .is_periodic = lapic_is_periodic, |
918 | }; | |
97222cc8 ED |
919 | |
920 | int kvm_create_lapic(struct kvm_vcpu *vcpu) | |
921 | { | |
922 | struct kvm_lapic *apic; | |
923 | ||
924 | ASSERT(vcpu != NULL); | |
925 | apic_debug("apic_init %d\n", vcpu->vcpu_id); | |
926 | ||
927 | apic = kzalloc(sizeof(*apic), GFP_KERNEL); | |
928 | if (!apic) | |
929 | goto nomem; | |
930 | ||
ad312c7c | 931 | vcpu->arch.apic = apic; |
97222cc8 ED |
932 | |
933 | apic->regs_page = alloc_page(GFP_KERNEL); | |
934 | if (apic->regs_page == NULL) { | |
935 | printk(KERN_ERR "malloc apic regs error for vcpu %x\n", | |
936 | vcpu->vcpu_id); | |
d589444e | 937 | goto nomem_free_apic; |
97222cc8 ED |
938 | } |
939 | apic->regs = page_address(apic->regs_page); | |
940 | memset(apic->regs, 0, PAGE_SIZE); | |
941 | apic->vcpu = vcpu; | |
942 | ||
d3c7b77d MT |
943 | hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC, |
944 | HRTIMER_MODE_ABS); | |
945 | apic->lapic_timer.timer.function = kvm_timer_fn; | |
946 | apic->lapic_timer.t_ops = &lapic_timer_ops; | |
947 | apic->lapic_timer.kvm = vcpu->kvm; | |
948 | apic->lapic_timer.vcpu_id = vcpu->vcpu_id; | |
949 | ||
97222cc8 | 950 | apic->base_address = APIC_DEFAULT_PHYS_BASE; |
ad312c7c | 951 | vcpu->arch.apic_base = APIC_DEFAULT_PHYS_BASE; |
97222cc8 | 952 | |
c5ec1534 | 953 | kvm_lapic_reset(vcpu); |
97222cc8 ED |
954 | apic->dev.read = apic_mmio_read; |
955 | apic->dev.write = apic_mmio_write; | |
956 | apic->dev.in_range = apic_mmio_range; | |
957 | apic->dev.private = apic; | |
958 | ||
959 | return 0; | |
d589444e RR |
960 | nomem_free_apic: |
961 | kfree(apic); | |
97222cc8 | 962 | nomem: |
97222cc8 ED |
963 | return -ENOMEM; |
964 | } | |
965 | EXPORT_SYMBOL_GPL(kvm_create_lapic); | |
966 | ||
967 | int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu) | |
968 | { | |
ad312c7c | 969 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
970 | int highest_irr; |
971 | ||
972 | if (!apic || !apic_enabled(apic)) | |
973 | return -1; | |
974 | ||
6e5d865c | 975 | apic_update_ppr(apic); |
97222cc8 ED |
976 | highest_irr = apic_find_highest_irr(apic); |
977 | if ((highest_irr == -1) || | |
978 | ((highest_irr & 0xF0) <= apic_get_reg(apic, APIC_PROCPRI))) | |
979 | return -1; | |
980 | return highest_irr; | |
981 | } | |
982 | ||
40487c68 QH |
983 | int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu) |
984 | { | |
ad312c7c | 985 | u32 lvt0 = apic_get_reg(vcpu->arch.apic, APIC_LVT0); |
40487c68 QH |
986 | int r = 0; |
987 | ||
988 | if (vcpu->vcpu_id == 0) { | |
ad312c7c | 989 | if (!apic_hw_enabled(vcpu->arch.apic)) |
40487c68 QH |
990 | r = 1; |
991 | if ((lvt0 & APIC_LVT_MASKED) == 0 && | |
992 | GET_APIC_DELIVERY_MODE(lvt0) == APIC_MODE_EXTINT) | |
993 | r = 1; | |
994 | } | |
995 | return r; | |
996 | } | |
997 | ||
1b9778da ED |
998 | void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu) |
999 | { | |
ad312c7c | 1000 | struct kvm_lapic *apic = vcpu->arch.apic; |
1b9778da | 1001 | |
d3c7b77d | 1002 | if (apic && atomic_read(&apic->lapic_timer.pending) > 0) { |
8fdb2351 | 1003 | if (kvm_apic_local_deliver(apic, APIC_LVTT)) |
d3c7b77d | 1004 | atomic_dec(&apic->lapic_timer.pending); |
1b9778da ED |
1005 | } |
1006 | } | |
1007 | ||
97222cc8 ED |
1008 | int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu) |
1009 | { | |
1010 | int vector = kvm_apic_has_interrupt(vcpu); | |
ad312c7c | 1011 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
1012 | |
1013 | if (vector == -1) | |
1014 | return -1; | |
1015 | ||
1016 | apic_set_vector(vector, apic->regs + APIC_ISR); | |
1017 | apic_update_ppr(apic); | |
1018 | apic_clear_irr(vector, apic); | |
1019 | return vector; | |
1020 | } | |
96ad2cc6 ED |
1021 | |
1022 | void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu) | |
1023 | { | |
ad312c7c | 1024 | struct kvm_lapic *apic = vcpu->arch.apic; |
96ad2cc6 | 1025 | |
ad312c7c | 1026 | apic->base_address = vcpu->arch.apic_base & |
96ad2cc6 ED |
1027 | MSR_IA32_APICBASE_BASE; |
1028 | apic_set_reg(apic, APIC_LVR, APIC_VERSION); | |
1029 | apic_update_ppr(apic); | |
d3c7b77d | 1030 | hrtimer_cancel(&apic->lapic_timer.timer); |
96ad2cc6 ED |
1031 | update_divide_count(apic); |
1032 | start_apic_timer(apic); | |
1033 | } | |
a3d7f85f | 1034 | |
2f52d58c | 1035 | void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) |
a3d7f85f | 1036 | { |
ad312c7c | 1037 | struct kvm_lapic *apic = vcpu->arch.apic; |
a3d7f85f ED |
1038 | struct hrtimer *timer; |
1039 | ||
1040 | if (!apic) | |
1041 | return; | |
1042 | ||
d3c7b77d | 1043 | timer = &apic->lapic_timer.timer; |
a3d7f85f | 1044 | if (hrtimer_cancel(timer)) |
beb20d52 | 1045 | hrtimer_start_expires(timer, HRTIMER_MODE_ABS); |
a3d7f85f | 1046 | } |
b93463aa AK |
1047 | |
1048 | void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu) | |
1049 | { | |
1050 | u32 data; | |
1051 | void *vapic; | |
1052 | ||
1053 | if (!irqchip_in_kernel(vcpu->kvm) || !vcpu->arch.apic->vapic_addr) | |
1054 | return; | |
1055 | ||
1056 | vapic = kmap_atomic(vcpu->arch.apic->vapic_page, KM_USER0); | |
1057 | data = *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr)); | |
1058 | kunmap_atomic(vapic, KM_USER0); | |
1059 | ||
1060 | apic_set_tpr(vcpu->arch.apic, data & 0xff); | |
1061 | } | |
1062 | ||
1063 | void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu) | |
1064 | { | |
1065 | u32 data, tpr; | |
1066 | int max_irr, max_isr; | |
1067 | struct kvm_lapic *apic; | |
1068 | void *vapic; | |
1069 | ||
1070 | if (!irqchip_in_kernel(vcpu->kvm) || !vcpu->arch.apic->vapic_addr) | |
1071 | return; | |
1072 | ||
1073 | apic = vcpu->arch.apic; | |
1074 | tpr = apic_get_reg(apic, APIC_TASKPRI) & 0xff; | |
1075 | max_irr = apic_find_highest_irr(apic); | |
1076 | if (max_irr < 0) | |
1077 | max_irr = 0; | |
1078 | max_isr = apic_find_highest_isr(apic); | |
1079 | if (max_isr < 0) | |
1080 | max_isr = 0; | |
1081 | data = (tpr & 0xff) | ((max_isr & 0xf0) << 8) | (max_irr << 24); | |
1082 | ||
1083 | vapic = kmap_atomic(vcpu->arch.apic->vapic_page, KM_USER0); | |
1084 | *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr)) = data; | |
1085 | kunmap_atomic(vapic, KM_USER0); | |
1086 | } | |
1087 | ||
1088 | void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr) | |
1089 | { | |
1090 | if (!irqchip_in_kernel(vcpu->kvm)) | |
1091 | return; | |
1092 | ||
1093 | vcpu->arch.apic->vapic_addr = vapic_addr; | |
1094 | } |