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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 | |
9611c187 | 8 | * Copyright 2009 Red Hat, Inc. and/or its affiliates. |
97222cc8 ED |
9 | * |
10 | * Authors: | |
11 | * Dor Laor <dor.laor@qumranet.com> | |
12 | * Gregory Haskins <ghaskins@novell.com> | |
13 | * Yaozu (Eddie) Dong <eddie.dong@intel.com> | |
14 | * | |
15 | * Based on Xen 3.1 code, Copyright (c) 2004, Intel Corporation. | |
16 | * | |
17 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
18 | * the COPYING file in the top-level directory. | |
19 | */ | |
20 | ||
edf88417 | 21 | #include <linux/kvm_host.h> |
97222cc8 ED |
22 | #include <linux/kvm.h> |
23 | #include <linux/mm.h> | |
24 | #include <linux/highmem.h> | |
25 | #include <linux/smp.h> | |
26 | #include <linux/hrtimer.h> | |
27 | #include <linux/io.h> | |
28 | #include <linux/module.h> | |
6f6d6a1a | 29 | #include <linux/math64.h> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
97222cc8 ED |
31 | #include <asm/processor.h> |
32 | #include <asm/msr.h> | |
33 | #include <asm/page.h> | |
34 | #include <asm/current.h> | |
35 | #include <asm/apicdef.h> | |
60063497 | 36 | #include <linux/atomic.h> |
5fdbf976 | 37 | #include "kvm_cache_regs.h" |
97222cc8 | 38 | #include "irq.h" |
229456fc | 39 | #include "trace.h" |
fc61b800 | 40 | #include "x86.h" |
97222cc8 | 41 | |
b682b814 MT |
42 | #ifndef CONFIG_X86_64 |
43 | #define mod_64(x, y) ((x) - (y) * div64_u64(x, y)) | |
44 | #else | |
45 | #define mod_64(x, y) ((x) % (y)) | |
46 | #endif | |
47 | ||
97222cc8 ED |
48 | #define PRId64 "d" |
49 | #define PRIx64 "llx" | |
50 | #define PRIu64 "u" | |
51 | #define PRIo64 "o" | |
52 | ||
53 | #define APIC_BUS_CYCLE_NS 1 | |
54 | ||
55 | /* #define apic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg) */ | |
56 | #define apic_debug(fmt, arg...) | |
57 | ||
58 | #define APIC_LVT_NUM 6 | |
59 | /* 14 is the version for Xeon and Pentium 8.4.8*/ | |
60 | #define APIC_VERSION (0x14UL | ((APIC_LVT_NUM - 1) << 16)) | |
61 | #define LAPIC_MMIO_LENGTH (1 << 12) | |
62 | /* followed define is not in apicdef.h */ | |
63 | #define APIC_SHORT_MASK 0xc0000 | |
64 | #define APIC_DEST_NOSHORT 0x0 | |
65 | #define APIC_DEST_MASK 0x800 | |
66 | #define MAX_APIC_VECTOR 256 | |
67 | ||
68 | #define VEC_POS(v) ((v) & (32 - 1)) | |
69 | #define REG_POS(v) (((v) >> 5) << 4) | |
ad312c7c | 70 | |
97222cc8 ED |
71 | static inline u32 apic_get_reg(struct kvm_lapic *apic, int reg_off) |
72 | { | |
73 | return *((u32 *) (apic->regs + reg_off)); | |
74 | } | |
75 | ||
76 | static inline void apic_set_reg(struct kvm_lapic *apic, int reg_off, u32 val) | |
77 | { | |
78 | *((u32 *) (apic->regs + reg_off)) = val; | |
79 | } | |
80 | ||
81 | static inline int apic_test_and_set_vector(int vec, void *bitmap) | |
82 | { | |
83 | return test_and_set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); | |
84 | } | |
85 | ||
86 | static inline int apic_test_and_clear_vector(int vec, void *bitmap) | |
87 | { | |
88 | return test_and_clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); | |
89 | } | |
90 | ||
91 | static inline void apic_set_vector(int vec, void *bitmap) | |
92 | { | |
93 | set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); | |
94 | } | |
95 | ||
96 | static inline void apic_clear_vector(int vec, void *bitmap) | |
97 | { | |
98 | clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); | |
99 | } | |
100 | ||
101 | static inline int apic_hw_enabled(struct kvm_lapic *apic) | |
102 | { | |
ad312c7c | 103 | return (apic)->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE; |
97222cc8 ED |
104 | } |
105 | ||
106 | static inline int apic_sw_enabled(struct kvm_lapic *apic) | |
107 | { | |
108 | return apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_APIC_ENABLED; | |
109 | } | |
110 | ||
111 | static inline int apic_enabled(struct kvm_lapic *apic) | |
112 | { | |
113 | return apic_sw_enabled(apic) && apic_hw_enabled(apic); | |
114 | } | |
115 | ||
116 | #define LVT_MASK \ | |
117 | (APIC_LVT_MASKED | APIC_SEND_PENDING | APIC_VECTOR_MASK) | |
118 | ||
119 | #define LINT_MASK \ | |
120 | (LVT_MASK | APIC_MODE_MASK | APIC_INPUT_POLARITY | \ | |
121 | APIC_LVT_REMOTE_IRR | APIC_LVT_LEVEL_TRIGGER) | |
122 | ||
123 | static inline int kvm_apic_id(struct kvm_lapic *apic) | |
124 | { | |
125 | return (apic_get_reg(apic, APIC_ID) >> 24) & 0xff; | |
126 | } | |
127 | ||
128 | static inline int apic_lvt_enabled(struct kvm_lapic *apic, int lvt_type) | |
129 | { | |
130 | return !(apic_get_reg(apic, lvt_type) & APIC_LVT_MASKED); | |
131 | } | |
132 | ||
133 | static inline int apic_lvt_vector(struct kvm_lapic *apic, int lvt_type) | |
134 | { | |
135 | return apic_get_reg(apic, lvt_type) & APIC_VECTOR_MASK; | |
136 | } | |
137 | ||
138 | static inline int apic_lvtt_period(struct kvm_lapic *apic) | |
139 | { | |
140 | return apic_get_reg(apic, APIC_LVTT) & APIC_LVT_TIMER_PERIODIC; | |
141 | } | |
142 | ||
cc6e462c JK |
143 | static inline int apic_lvt_nmi_mode(u32 lvt_val) |
144 | { | |
145 | return (lvt_val & (APIC_MODE_MASK | APIC_LVT_MASKED)) == APIC_DM_NMI; | |
146 | } | |
147 | ||
fc61b800 GN |
148 | void kvm_apic_set_version(struct kvm_vcpu *vcpu) |
149 | { | |
150 | struct kvm_lapic *apic = vcpu->arch.apic; | |
151 | struct kvm_cpuid_entry2 *feat; | |
152 | u32 v = APIC_VERSION; | |
153 | ||
154 | if (!irqchip_in_kernel(vcpu->kvm)) | |
155 | return; | |
156 | ||
157 | feat = kvm_find_cpuid_entry(apic->vcpu, 0x1, 0); | |
158 | if (feat && (feat->ecx & (1 << (X86_FEATURE_X2APIC & 31)))) | |
159 | v |= APIC_LVR_DIRECTED_EOI; | |
160 | apic_set_reg(apic, APIC_LVR, v); | |
161 | } | |
162 | ||
0105d1a5 GN |
163 | static inline int apic_x2apic_mode(struct kvm_lapic *apic) |
164 | { | |
165 | return apic->vcpu->arch.apic_base & X2APIC_ENABLE; | |
166 | } | |
167 | ||
97222cc8 ED |
168 | static unsigned int apic_lvt_mask[APIC_LVT_NUM] = { |
169 | LVT_MASK | APIC_LVT_TIMER_PERIODIC, /* LVTT */ | |
170 | LVT_MASK | APIC_MODE_MASK, /* LVTTHMR */ | |
171 | LVT_MASK | APIC_MODE_MASK, /* LVTPC */ | |
172 | LINT_MASK, LINT_MASK, /* LVT0-1 */ | |
173 | LVT_MASK /* LVTERR */ | |
174 | }; | |
175 | ||
176 | static int find_highest_vector(void *bitmap) | |
177 | { | |
178 | u32 *word = bitmap; | |
179 | int word_offset = MAX_APIC_VECTOR >> 5; | |
180 | ||
181 | while ((word_offset != 0) && (word[(--word_offset) << 2] == 0)) | |
182 | continue; | |
183 | ||
184 | if (likely(!word_offset && !word[0])) | |
185 | return -1; | |
186 | else | |
187 | return fls(word[word_offset << 2]) - 1 + (word_offset << 5); | |
188 | } | |
189 | ||
190 | static inline int apic_test_and_set_irr(int vec, struct kvm_lapic *apic) | |
191 | { | |
33e4c686 | 192 | apic->irr_pending = true; |
97222cc8 ED |
193 | return apic_test_and_set_vector(vec, apic->regs + APIC_IRR); |
194 | } | |
195 | ||
33e4c686 | 196 | static inline int apic_search_irr(struct kvm_lapic *apic) |
97222cc8 | 197 | { |
33e4c686 | 198 | return find_highest_vector(apic->regs + APIC_IRR); |
97222cc8 ED |
199 | } |
200 | ||
201 | static inline int apic_find_highest_irr(struct kvm_lapic *apic) | |
202 | { | |
203 | int result; | |
204 | ||
33e4c686 GN |
205 | if (!apic->irr_pending) |
206 | return -1; | |
207 | ||
208 | result = apic_search_irr(apic); | |
97222cc8 ED |
209 | ASSERT(result == -1 || result >= 16); |
210 | ||
211 | return result; | |
212 | } | |
213 | ||
33e4c686 GN |
214 | static inline void apic_clear_irr(int vec, struct kvm_lapic *apic) |
215 | { | |
216 | apic->irr_pending = false; | |
217 | apic_clear_vector(vec, apic->regs + APIC_IRR); | |
218 | if (apic_search_irr(apic) != -1) | |
219 | apic->irr_pending = true; | |
220 | } | |
221 | ||
6e5d865c YS |
222 | int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu) |
223 | { | |
ad312c7c | 224 | struct kvm_lapic *apic = vcpu->arch.apic; |
6e5d865c YS |
225 | int highest_irr; |
226 | ||
33e4c686 GN |
227 | /* This may race with setting of irr in __apic_accept_irq() and |
228 | * value returned may be wrong, but kvm_vcpu_kick() in __apic_accept_irq | |
229 | * will cause vmexit immediately and the value will be recalculated | |
230 | * on the next vmentry. | |
231 | */ | |
6e5d865c YS |
232 | if (!apic) |
233 | return 0; | |
234 | highest_irr = apic_find_highest_irr(apic); | |
235 | ||
236 | return highest_irr; | |
237 | } | |
6e5d865c | 238 | |
6da7e3f6 GN |
239 | static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, |
240 | int vector, int level, int trig_mode); | |
241 | ||
58c2dde1 | 242 | int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq) |
97222cc8 | 243 | { |
ad312c7c | 244 | struct kvm_lapic *apic = vcpu->arch.apic; |
8be5453f | 245 | |
58c2dde1 GN |
246 | return __apic_accept_irq(apic, irq->delivery_mode, irq->vector, |
247 | irq->level, irq->trig_mode); | |
97222cc8 ED |
248 | } |
249 | ||
250 | static inline int apic_find_highest_isr(struct kvm_lapic *apic) | |
251 | { | |
252 | int result; | |
253 | ||
254 | result = find_highest_vector(apic->regs + APIC_ISR); | |
255 | ASSERT(result == -1 || result >= 16); | |
256 | ||
257 | return result; | |
258 | } | |
259 | ||
260 | static void apic_update_ppr(struct kvm_lapic *apic) | |
261 | { | |
3842d135 | 262 | u32 tpr, isrv, ppr, old_ppr; |
97222cc8 ED |
263 | int isr; |
264 | ||
3842d135 | 265 | old_ppr = apic_get_reg(apic, APIC_PROCPRI); |
97222cc8 ED |
266 | tpr = apic_get_reg(apic, APIC_TASKPRI); |
267 | isr = apic_find_highest_isr(apic); | |
268 | isrv = (isr != -1) ? isr : 0; | |
269 | ||
270 | if ((tpr & 0xf0) >= (isrv & 0xf0)) | |
271 | ppr = tpr & 0xff; | |
272 | else | |
273 | ppr = isrv & 0xf0; | |
274 | ||
275 | apic_debug("vlapic %p, ppr 0x%x, isr 0x%x, isrv 0x%x", | |
276 | apic, ppr, isr, isrv); | |
277 | ||
3842d135 AK |
278 | if (old_ppr != ppr) { |
279 | apic_set_reg(apic, APIC_PROCPRI, ppr); | |
83bcacb1 AK |
280 | if (ppr < old_ppr) |
281 | kvm_make_request(KVM_REQ_EVENT, apic->vcpu); | |
3842d135 | 282 | } |
97222cc8 ED |
283 | } |
284 | ||
285 | static void apic_set_tpr(struct kvm_lapic *apic, u32 tpr) | |
286 | { | |
287 | apic_set_reg(apic, APIC_TASKPRI, tpr); | |
288 | apic_update_ppr(apic); | |
289 | } | |
290 | ||
291 | int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest) | |
292 | { | |
343f94fe | 293 | return dest == 0xff || kvm_apic_id(apic) == dest; |
97222cc8 ED |
294 | } |
295 | ||
296 | int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda) | |
297 | { | |
298 | int result = 0; | |
0105d1a5 GN |
299 | u32 logical_id; |
300 | ||
301 | if (apic_x2apic_mode(apic)) { | |
302 | logical_id = apic_get_reg(apic, APIC_LDR); | |
303 | return logical_id & mda; | |
304 | } | |
97222cc8 ED |
305 | |
306 | logical_id = GET_APIC_LOGICAL_ID(apic_get_reg(apic, APIC_LDR)); | |
307 | ||
308 | switch (apic_get_reg(apic, APIC_DFR)) { | |
309 | case APIC_DFR_FLAT: | |
310 | if (logical_id & mda) | |
311 | result = 1; | |
312 | break; | |
313 | case APIC_DFR_CLUSTER: | |
314 | if (((logical_id >> 4) == (mda >> 0x4)) | |
315 | && (logical_id & mda & 0xf)) | |
316 | result = 1; | |
317 | break; | |
318 | default: | |
319 | printk(KERN_WARNING "Bad DFR vcpu %d: %08x\n", | |
320 | apic->vcpu->vcpu_id, apic_get_reg(apic, APIC_DFR)); | |
321 | break; | |
322 | } | |
323 | ||
324 | return result; | |
325 | } | |
326 | ||
343f94fe | 327 | int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, |
97222cc8 ED |
328 | int short_hand, int dest, int dest_mode) |
329 | { | |
330 | int result = 0; | |
ad312c7c | 331 | struct kvm_lapic *target = vcpu->arch.apic; |
97222cc8 ED |
332 | |
333 | apic_debug("target %p, source %p, dest 0x%x, " | |
343f94fe | 334 | "dest_mode 0x%x, short_hand 0x%x\n", |
97222cc8 ED |
335 | target, source, dest, dest_mode, short_hand); |
336 | ||
bd371396 | 337 | ASSERT(target); |
97222cc8 ED |
338 | switch (short_hand) { |
339 | case APIC_DEST_NOSHORT: | |
343f94fe | 340 | if (dest_mode == 0) |
97222cc8 | 341 | /* Physical mode. */ |
343f94fe GN |
342 | result = kvm_apic_match_physical_addr(target, dest); |
343 | else | |
97222cc8 ED |
344 | /* Logical mode. */ |
345 | result = kvm_apic_match_logical_addr(target, dest); | |
346 | break; | |
347 | case APIC_DEST_SELF: | |
343f94fe | 348 | result = (target == source); |
97222cc8 ED |
349 | break; |
350 | case APIC_DEST_ALLINC: | |
351 | result = 1; | |
352 | break; | |
353 | case APIC_DEST_ALLBUT: | |
343f94fe | 354 | result = (target != source); |
97222cc8 ED |
355 | break; |
356 | default: | |
357 | printk(KERN_WARNING "Bad dest shorthand value %x\n", | |
358 | short_hand); | |
359 | break; | |
360 | } | |
361 | ||
362 | return result; | |
363 | } | |
364 | ||
365 | /* | |
366 | * Add a pending IRQ into lapic. | |
367 | * Return 1 if successfully added and 0 if discarded. | |
368 | */ | |
369 | static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, | |
370 | int vector, int level, int trig_mode) | |
371 | { | |
6da7e3f6 | 372 | int result = 0; |
c5ec1534 | 373 | struct kvm_vcpu *vcpu = apic->vcpu; |
97222cc8 ED |
374 | |
375 | switch (delivery_mode) { | |
97222cc8 | 376 | case APIC_DM_LOWEST: |
e1035715 GN |
377 | vcpu->arch.apic_arb_prio++; |
378 | case APIC_DM_FIXED: | |
97222cc8 ED |
379 | /* FIXME add logic for vcpu on reset */ |
380 | if (unlikely(!apic_enabled(apic))) | |
381 | break; | |
382 | ||
a5d36f82 AK |
383 | if (trig_mode) { |
384 | apic_debug("level trig mode for vector %d", vector); | |
385 | apic_set_vector(vector, apic->regs + APIC_TMR); | |
386 | } else | |
387 | apic_clear_vector(vector, apic->regs + APIC_TMR); | |
388 | ||
6da7e3f6 | 389 | result = !apic_test_and_set_irr(vector, apic); |
1000ff8d | 390 | trace_kvm_apic_accept_irq(vcpu->vcpu_id, delivery_mode, |
4da74896 | 391 | trig_mode, vector, !result); |
6da7e3f6 GN |
392 | if (!result) { |
393 | if (trig_mode) | |
394 | apic_debug("level trig mode repeatedly for " | |
395 | "vector %d", vector); | |
97222cc8 ED |
396 | break; |
397 | } | |
398 | ||
3842d135 | 399 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
d7690175 | 400 | kvm_vcpu_kick(vcpu); |
97222cc8 ED |
401 | break; |
402 | ||
403 | case APIC_DM_REMRD: | |
404 | printk(KERN_DEBUG "Ignoring delivery mode 3\n"); | |
405 | break; | |
406 | ||
407 | case APIC_DM_SMI: | |
408 | printk(KERN_DEBUG "Ignoring guest SMI\n"); | |
409 | break; | |
3419ffc8 | 410 | |
97222cc8 | 411 | case APIC_DM_NMI: |
6da7e3f6 | 412 | result = 1; |
3419ffc8 | 413 | kvm_inject_nmi(vcpu); |
26df99c6 | 414 | kvm_vcpu_kick(vcpu); |
97222cc8 ED |
415 | break; |
416 | ||
417 | case APIC_DM_INIT: | |
c5ec1534 | 418 | if (level) { |
6da7e3f6 | 419 | result = 1; |
a4535290 | 420 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; |
3842d135 | 421 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
c5ec1534 HQ |
422 | kvm_vcpu_kick(vcpu); |
423 | } else { | |
1b10bf31 JK |
424 | apic_debug("Ignoring de-assert INIT to vcpu %d\n", |
425 | vcpu->vcpu_id); | |
c5ec1534 | 426 | } |
97222cc8 ED |
427 | break; |
428 | ||
429 | case APIC_DM_STARTUP: | |
1b10bf31 JK |
430 | apic_debug("SIPI to vcpu %d vector 0x%02x\n", |
431 | vcpu->vcpu_id, vector); | |
a4535290 | 432 | if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { |
6da7e3f6 | 433 | result = 1; |
ad312c7c | 434 | vcpu->arch.sipi_vector = vector; |
a4535290 | 435 | vcpu->arch.mp_state = KVM_MP_STATE_SIPI_RECEIVED; |
3842d135 | 436 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
d7690175 | 437 | kvm_vcpu_kick(vcpu); |
c5ec1534 | 438 | } |
97222cc8 ED |
439 | break; |
440 | ||
23930f95 JK |
441 | case APIC_DM_EXTINT: |
442 | /* | |
443 | * Should only be called by kvm_apic_local_deliver() with LVT0, | |
444 | * before NMI watchdog was enabled. Already handled by | |
445 | * kvm_apic_accept_pic_intr(). | |
446 | */ | |
447 | break; | |
448 | ||
97222cc8 ED |
449 | default: |
450 | printk(KERN_ERR "TODO: unsupported delivery mode %x\n", | |
451 | delivery_mode); | |
452 | break; | |
453 | } | |
454 | return result; | |
455 | } | |
456 | ||
e1035715 | 457 | int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2) |
8be5453f | 458 | { |
e1035715 | 459 | return vcpu1->arch.apic_arb_prio - vcpu2->arch.apic_arb_prio; |
8be5453f ZX |
460 | } |
461 | ||
97222cc8 ED |
462 | static void apic_set_eoi(struct kvm_lapic *apic) |
463 | { | |
464 | int vector = apic_find_highest_isr(apic); | |
f5244726 | 465 | int trigger_mode; |
97222cc8 ED |
466 | /* |
467 | * Not every write EOI will has corresponding ISR, | |
468 | * one example is when Kernel check timer on setup_IO_APIC | |
469 | */ | |
470 | if (vector == -1) | |
471 | return; | |
472 | ||
473 | apic_clear_vector(vector, apic->regs + APIC_ISR); | |
474 | apic_update_ppr(apic); | |
475 | ||
476 | if (apic_test_and_clear_vector(vector, apic->regs + APIC_TMR)) | |
f5244726 MT |
477 | trigger_mode = IOAPIC_LEVEL_TRIG; |
478 | else | |
479 | trigger_mode = IOAPIC_EDGE_TRIG; | |
eba0226b | 480 | if (!(apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_DIRECTED_EOI)) |
fc61b800 | 481 | kvm_ioapic_update_eoi(apic->vcpu->kvm, vector, trigger_mode); |
3842d135 | 482 | kvm_make_request(KVM_REQ_EVENT, apic->vcpu); |
97222cc8 ED |
483 | } |
484 | ||
485 | static void apic_send_ipi(struct kvm_lapic *apic) | |
486 | { | |
487 | u32 icr_low = apic_get_reg(apic, APIC_ICR); | |
488 | u32 icr_high = apic_get_reg(apic, APIC_ICR2); | |
58c2dde1 | 489 | struct kvm_lapic_irq irq; |
97222cc8 | 490 | |
58c2dde1 GN |
491 | irq.vector = icr_low & APIC_VECTOR_MASK; |
492 | irq.delivery_mode = icr_low & APIC_MODE_MASK; | |
493 | irq.dest_mode = icr_low & APIC_DEST_MASK; | |
494 | irq.level = icr_low & APIC_INT_ASSERT; | |
495 | irq.trig_mode = icr_low & APIC_INT_LEVELTRIG; | |
496 | irq.shorthand = icr_low & APIC_SHORT_MASK; | |
0105d1a5 GN |
497 | if (apic_x2apic_mode(apic)) |
498 | irq.dest_id = icr_high; | |
499 | else | |
500 | irq.dest_id = GET_APIC_DEST_FIELD(icr_high); | |
97222cc8 | 501 | |
1000ff8d GN |
502 | trace_kvm_apic_ipi(icr_low, irq.dest_id); |
503 | ||
97222cc8 ED |
504 | apic_debug("icr_high 0x%x, icr_low 0x%x, " |
505 | "short_hand 0x%x, dest 0x%x, trig_mode 0x%x, level 0x%x, " | |
506 | "dest_mode 0x%x, delivery_mode 0x%x, vector 0x%x\n", | |
9b5843dd | 507 | icr_high, icr_low, irq.shorthand, irq.dest_id, |
58c2dde1 GN |
508 | irq.trig_mode, irq.level, irq.dest_mode, irq.delivery_mode, |
509 | irq.vector); | |
510 | ||
511 | kvm_irq_delivery_to_apic(apic->vcpu->kvm, apic, &irq); | |
97222cc8 ED |
512 | } |
513 | ||
514 | static u32 apic_get_tmcct(struct kvm_lapic *apic) | |
515 | { | |
b682b814 MT |
516 | ktime_t remaining; |
517 | s64 ns; | |
9da8f4e8 | 518 | u32 tmcct; |
97222cc8 ED |
519 | |
520 | ASSERT(apic != NULL); | |
521 | ||
9da8f4e8 | 522 | /* if initial count is 0, current count should also be 0 */ |
b682b814 | 523 | if (apic_get_reg(apic, APIC_TMICT) == 0) |
9da8f4e8 KP |
524 | return 0; |
525 | ||
ace15464 | 526 | remaining = hrtimer_get_remaining(&apic->lapic_timer.timer); |
b682b814 MT |
527 | if (ktime_to_ns(remaining) < 0) |
528 | remaining = ktime_set(0, 0); | |
529 | ||
d3c7b77d MT |
530 | ns = mod_64(ktime_to_ns(remaining), apic->lapic_timer.period); |
531 | tmcct = div64_u64(ns, | |
532 | (APIC_BUS_CYCLE_NS * apic->divide_count)); | |
97222cc8 ED |
533 | |
534 | return tmcct; | |
535 | } | |
536 | ||
b209749f AK |
537 | static void __report_tpr_access(struct kvm_lapic *apic, bool write) |
538 | { | |
539 | struct kvm_vcpu *vcpu = apic->vcpu; | |
540 | struct kvm_run *run = vcpu->run; | |
541 | ||
a8eeb04a | 542 | kvm_make_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu); |
5fdbf976 | 543 | run->tpr_access.rip = kvm_rip_read(vcpu); |
b209749f AK |
544 | run->tpr_access.is_write = write; |
545 | } | |
546 | ||
547 | static inline void report_tpr_access(struct kvm_lapic *apic, bool write) | |
548 | { | |
549 | if (apic->vcpu->arch.tpr_access_reporting) | |
550 | __report_tpr_access(apic, write); | |
551 | } | |
552 | ||
97222cc8 ED |
553 | static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset) |
554 | { | |
555 | u32 val = 0; | |
556 | ||
557 | if (offset >= LAPIC_MMIO_LENGTH) | |
558 | return 0; | |
559 | ||
560 | switch (offset) { | |
0105d1a5 GN |
561 | case APIC_ID: |
562 | if (apic_x2apic_mode(apic)) | |
563 | val = kvm_apic_id(apic); | |
564 | else | |
565 | val = kvm_apic_id(apic) << 24; | |
566 | break; | |
97222cc8 ED |
567 | case APIC_ARBPRI: |
568 | printk(KERN_WARNING "Access APIC ARBPRI register " | |
569 | "which is for P6\n"); | |
570 | break; | |
571 | ||
572 | case APIC_TMCCT: /* Timer CCR */ | |
573 | val = apic_get_tmcct(apic); | |
574 | break; | |
575 | ||
b209749f AK |
576 | case APIC_TASKPRI: |
577 | report_tpr_access(apic, false); | |
578 | /* fall thru */ | |
97222cc8 | 579 | default: |
6e5d865c | 580 | apic_update_ppr(apic); |
97222cc8 ED |
581 | val = apic_get_reg(apic, offset); |
582 | break; | |
583 | } | |
584 | ||
585 | return val; | |
586 | } | |
587 | ||
d76685c4 GH |
588 | static inline struct kvm_lapic *to_lapic(struct kvm_io_device *dev) |
589 | { | |
590 | return container_of(dev, struct kvm_lapic, dev); | |
591 | } | |
592 | ||
0105d1a5 GN |
593 | static int apic_reg_read(struct kvm_lapic *apic, u32 offset, int len, |
594 | void *data) | |
97222cc8 | 595 | { |
97222cc8 ED |
596 | unsigned char alignment = offset & 0xf; |
597 | u32 result; | |
0105d1a5 GN |
598 | /* this bitmask has a bit cleared for each reserver register */ |
599 | static const u64 rmask = 0x43ff01ffffffe70cULL; | |
97222cc8 ED |
600 | |
601 | if ((alignment + len) > 4) { | |
4088bb3c GN |
602 | apic_debug("KVM_APIC_READ: alignment error %x %d\n", |
603 | offset, len); | |
0105d1a5 | 604 | return 1; |
97222cc8 | 605 | } |
0105d1a5 GN |
606 | |
607 | if (offset > 0x3f0 || !(rmask & (1ULL << (offset >> 4)))) { | |
4088bb3c GN |
608 | apic_debug("KVM_APIC_READ: read reserved register %x\n", |
609 | offset); | |
0105d1a5 GN |
610 | return 1; |
611 | } | |
612 | ||
97222cc8 ED |
613 | result = __apic_read(apic, offset & ~0xf); |
614 | ||
229456fc MT |
615 | trace_kvm_apic_read(offset, result); |
616 | ||
97222cc8 ED |
617 | switch (len) { |
618 | case 1: | |
619 | case 2: | |
620 | case 4: | |
621 | memcpy(data, (char *)&result + alignment, len); | |
622 | break; | |
623 | default: | |
624 | printk(KERN_ERR "Local APIC read with len = %x, " | |
625 | "should be 1,2, or 4 instead\n", len); | |
626 | break; | |
627 | } | |
bda9020e | 628 | return 0; |
97222cc8 ED |
629 | } |
630 | ||
0105d1a5 GN |
631 | static int apic_mmio_in_range(struct kvm_lapic *apic, gpa_t addr) |
632 | { | |
633 | return apic_hw_enabled(apic) && | |
634 | addr >= apic->base_address && | |
635 | addr < apic->base_address + LAPIC_MMIO_LENGTH; | |
636 | } | |
637 | ||
638 | static int apic_mmio_read(struct kvm_io_device *this, | |
639 | gpa_t address, int len, void *data) | |
640 | { | |
641 | struct kvm_lapic *apic = to_lapic(this); | |
642 | u32 offset = address - apic->base_address; | |
643 | ||
644 | if (!apic_mmio_in_range(apic, address)) | |
645 | return -EOPNOTSUPP; | |
646 | ||
647 | apic_reg_read(apic, offset, len, data); | |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
97222cc8 ED |
652 | static void update_divide_count(struct kvm_lapic *apic) |
653 | { | |
654 | u32 tmp1, tmp2, tdcr; | |
655 | ||
656 | tdcr = apic_get_reg(apic, APIC_TDCR); | |
657 | tmp1 = tdcr & 0xf; | |
658 | tmp2 = ((tmp1 & 0x3) | ((tmp1 & 0x8) >> 1)) + 1; | |
d3c7b77d | 659 | apic->divide_count = 0x1 << (tmp2 & 0x7); |
97222cc8 ED |
660 | |
661 | apic_debug("timer divide count is 0x%x\n", | |
9b5843dd | 662 | apic->divide_count); |
97222cc8 ED |
663 | } |
664 | ||
665 | static void start_apic_timer(struct kvm_lapic *apic) | |
666 | { | |
d3c7b77d | 667 | ktime_t now = apic->lapic_timer.timer.base->get_time(); |
97222cc8 | 668 | |
b2d83cfa | 669 | apic->lapic_timer.period = (u64)apic_get_reg(apic, APIC_TMICT) * |
d3c7b77d MT |
670 | APIC_BUS_CYCLE_NS * apic->divide_count; |
671 | atomic_set(&apic->lapic_timer.pending, 0); | |
0b975a3c | 672 | |
d3c7b77d | 673 | if (!apic->lapic_timer.period) |
0b975a3c | 674 | return; |
1444885a MT |
675 | /* |
676 | * Do not allow the guest to program periodic timers with small | |
677 | * interval, since the hrtimers are not throttled by the host | |
678 | * scheduler. | |
679 | */ | |
680 | if (apic_lvtt_period(apic)) { | |
681 | if (apic->lapic_timer.period < NSEC_PER_MSEC/2) | |
682 | apic->lapic_timer.period = NSEC_PER_MSEC/2; | |
683 | } | |
0b975a3c | 684 | |
d3c7b77d MT |
685 | hrtimer_start(&apic->lapic_timer.timer, |
686 | ktime_add_ns(now, apic->lapic_timer.period), | |
97222cc8 ED |
687 | HRTIMER_MODE_ABS); |
688 | ||
689 | apic_debug("%s: bus cycle is %" PRId64 "ns, now 0x%016" | |
690 | PRIx64 ", " | |
691 | "timer initial count 0x%x, period %lldns, " | |
b8688d51 | 692 | "expire @ 0x%016" PRIx64 ".\n", __func__, |
97222cc8 ED |
693 | APIC_BUS_CYCLE_NS, ktime_to_ns(now), |
694 | apic_get_reg(apic, APIC_TMICT), | |
d3c7b77d | 695 | apic->lapic_timer.period, |
97222cc8 | 696 | ktime_to_ns(ktime_add_ns(now, |
d3c7b77d | 697 | apic->lapic_timer.period))); |
97222cc8 ED |
698 | } |
699 | ||
cc6e462c JK |
700 | static void apic_manage_nmi_watchdog(struct kvm_lapic *apic, u32 lvt0_val) |
701 | { | |
702 | int nmi_wd_enabled = apic_lvt_nmi_mode(apic_get_reg(apic, APIC_LVT0)); | |
703 | ||
704 | if (apic_lvt_nmi_mode(lvt0_val)) { | |
705 | if (!nmi_wd_enabled) { | |
706 | apic_debug("Receive NMI setting on APIC_LVT0 " | |
707 | "for cpu %d\n", apic->vcpu->vcpu_id); | |
708 | apic->vcpu->kvm->arch.vapics_in_nmi_mode++; | |
709 | } | |
710 | } else if (nmi_wd_enabled) | |
711 | apic->vcpu->kvm->arch.vapics_in_nmi_mode--; | |
712 | } | |
713 | ||
0105d1a5 | 714 | static int apic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val) |
97222cc8 | 715 | { |
0105d1a5 | 716 | int ret = 0; |
97222cc8 | 717 | |
0105d1a5 | 718 | trace_kvm_apic_write(reg, val); |
97222cc8 | 719 | |
0105d1a5 | 720 | switch (reg) { |
97222cc8 | 721 | case APIC_ID: /* Local APIC ID */ |
0105d1a5 GN |
722 | if (!apic_x2apic_mode(apic)) |
723 | apic_set_reg(apic, APIC_ID, val); | |
724 | else | |
725 | ret = 1; | |
97222cc8 ED |
726 | break; |
727 | ||
728 | case APIC_TASKPRI: | |
b209749f | 729 | report_tpr_access(apic, true); |
97222cc8 ED |
730 | apic_set_tpr(apic, val & 0xff); |
731 | break; | |
732 | ||
733 | case APIC_EOI: | |
734 | apic_set_eoi(apic); | |
735 | break; | |
736 | ||
737 | case APIC_LDR: | |
0105d1a5 GN |
738 | if (!apic_x2apic_mode(apic)) |
739 | apic_set_reg(apic, APIC_LDR, val & APIC_LDR_MASK); | |
740 | else | |
741 | ret = 1; | |
97222cc8 ED |
742 | break; |
743 | ||
744 | case APIC_DFR: | |
0105d1a5 GN |
745 | if (!apic_x2apic_mode(apic)) |
746 | apic_set_reg(apic, APIC_DFR, val | 0x0FFFFFFF); | |
747 | else | |
748 | ret = 1; | |
97222cc8 ED |
749 | break; |
750 | ||
fc61b800 GN |
751 | case APIC_SPIV: { |
752 | u32 mask = 0x3ff; | |
753 | if (apic_get_reg(apic, APIC_LVR) & APIC_LVR_DIRECTED_EOI) | |
754 | mask |= APIC_SPIV_DIRECTED_EOI; | |
755 | apic_set_reg(apic, APIC_SPIV, val & mask); | |
97222cc8 ED |
756 | if (!(val & APIC_SPIV_APIC_ENABLED)) { |
757 | int i; | |
758 | u32 lvt_val; | |
759 | ||
760 | for (i = 0; i < APIC_LVT_NUM; i++) { | |
761 | lvt_val = apic_get_reg(apic, | |
762 | APIC_LVTT + 0x10 * i); | |
763 | apic_set_reg(apic, APIC_LVTT + 0x10 * i, | |
764 | lvt_val | APIC_LVT_MASKED); | |
765 | } | |
d3c7b77d | 766 | atomic_set(&apic->lapic_timer.pending, 0); |
97222cc8 ED |
767 | |
768 | } | |
769 | break; | |
fc61b800 | 770 | } |
97222cc8 ED |
771 | case APIC_ICR: |
772 | /* No delay here, so we always clear the pending bit */ | |
773 | apic_set_reg(apic, APIC_ICR, val & ~(1 << 12)); | |
774 | apic_send_ipi(apic); | |
775 | break; | |
776 | ||
777 | case APIC_ICR2: | |
0105d1a5 GN |
778 | if (!apic_x2apic_mode(apic)) |
779 | val &= 0xff000000; | |
780 | apic_set_reg(apic, APIC_ICR2, val); | |
97222cc8 ED |
781 | break; |
782 | ||
23930f95 | 783 | case APIC_LVT0: |
cc6e462c | 784 | apic_manage_nmi_watchdog(apic, val); |
97222cc8 ED |
785 | case APIC_LVTT: |
786 | case APIC_LVTTHMR: | |
787 | case APIC_LVTPC: | |
97222cc8 ED |
788 | case APIC_LVT1: |
789 | case APIC_LVTERR: | |
790 | /* TODO: Check vector */ | |
791 | if (!apic_sw_enabled(apic)) | |
792 | val |= APIC_LVT_MASKED; | |
793 | ||
0105d1a5 GN |
794 | val &= apic_lvt_mask[(reg - APIC_LVTT) >> 4]; |
795 | apic_set_reg(apic, reg, val); | |
97222cc8 ED |
796 | |
797 | break; | |
798 | ||
799 | case APIC_TMICT: | |
d3c7b77d | 800 | hrtimer_cancel(&apic->lapic_timer.timer); |
97222cc8 ED |
801 | apic_set_reg(apic, APIC_TMICT, val); |
802 | start_apic_timer(apic); | |
0105d1a5 | 803 | break; |
97222cc8 ED |
804 | |
805 | case APIC_TDCR: | |
806 | if (val & 4) | |
807 | printk(KERN_ERR "KVM_WRITE:TDCR %x\n", val); | |
808 | apic_set_reg(apic, APIC_TDCR, val); | |
809 | update_divide_count(apic); | |
810 | break; | |
811 | ||
0105d1a5 GN |
812 | case APIC_ESR: |
813 | if (apic_x2apic_mode(apic) && val != 0) { | |
814 | printk(KERN_ERR "KVM_WRITE:ESR not zero %x\n", val); | |
815 | ret = 1; | |
816 | } | |
817 | break; | |
818 | ||
819 | case APIC_SELF_IPI: | |
820 | if (apic_x2apic_mode(apic)) { | |
821 | apic_reg_write(apic, APIC_ICR, 0x40000 | (val & 0xff)); | |
822 | } else | |
823 | ret = 1; | |
824 | break; | |
97222cc8 | 825 | default: |
0105d1a5 | 826 | ret = 1; |
97222cc8 ED |
827 | break; |
828 | } | |
0105d1a5 GN |
829 | if (ret) |
830 | apic_debug("Local APIC Write to read-only register %x\n", reg); | |
831 | return ret; | |
832 | } | |
833 | ||
834 | static int apic_mmio_write(struct kvm_io_device *this, | |
835 | gpa_t address, int len, const void *data) | |
836 | { | |
837 | struct kvm_lapic *apic = to_lapic(this); | |
838 | unsigned int offset = address - apic->base_address; | |
839 | u32 val; | |
840 | ||
841 | if (!apic_mmio_in_range(apic, address)) | |
842 | return -EOPNOTSUPP; | |
843 | ||
844 | /* | |
845 | * APIC register must be aligned on 128-bits boundary. | |
846 | * 32/64/128 bits registers must be accessed thru 32 bits. | |
847 | * Refer SDM 8.4.1 | |
848 | */ | |
849 | if (len != 4 || (offset & 0xf)) { | |
850 | /* Don't shout loud, $infamous_os would cause only noise. */ | |
851 | apic_debug("apic write: bad size=%d %lx\n", len, (long)address); | |
756975bb | 852 | return 0; |
0105d1a5 GN |
853 | } |
854 | ||
855 | val = *(u32*)data; | |
856 | ||
857 | /* too common printing */ | |
858 | if (offset != APIC_EOI) | |
859 | apic_debug("%s: offset 0x%x with length 0x%x, and value is " | |
860 | "0x%x\n", __func__, offset, len, val); | |
861 | ||
862 | apic_reg_write(apic, offset & 0xff0, val); | |
863 | ||
bda9020e | 864 | return 0; |
97222cc8 ED |
865 | } |
866 | ||
d589444e | 867 | void kvm_free_lapic(struct kvm_vcpu *vcpu) |
97222cc8 | 868 | { |
ad312c7c | 869 | if (!vcpu->arch.apic) |
97222cc8 ED |
870 | return; |
871 | ||
d3c7b77d | 872 | hrtimer_cancel(&vcpu->arch.apic->lapic_timer.timer); |
97222cc8 | 873 | |
afc20184 TY |
874 | if (vcpu->arch.apic->regs) |
875 | free_page((unsigned long)vcpu->arch.apic->regs); | |
97222cc8 | 876 | |
ad312c7c | 877 | kfree(vcpu->arch.apic); |
97222cc8 ED |
878 | } |
879 | ||
880 | /* | |
881 | *---------------------------------------------------------------------- | |
882 | * LAPIC interface | |
883 | *---------------------------------------------------------------------- | |
884 | */ | |
885 | ||
886 | void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8) | |
887 | { | |
ad312c7c | 888 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
889 | |
890 | if (!apic) | |
891 | return; | |
b93463aa AK |
892 | apic_set_tpr(apic, ((cr8 & 0x0f) << 4) |
893 | | (apic_get_reg(apic, APIC_TASKPRI) & 4)); | |
97222cc8 ED |
894 | } |
895 | ||
896 | u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu) | |
897 | { | |
ad312c7c | 898 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
899 | u64 tpr; |
900 | ||
901 | if (!apic) | |
902 | return 0; | |
903 | tpr = (u64) apic_get_reg(apic, APIC_TASKPRI); | |
904 | ||
905 | return (tpr & 0xf0) >> 4; | |
906 | } | |
907 | ||
908 | void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value) | |
909 | { | |
ad312c7c | 910 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
911 | |
912 | if (!apic) { | |
913 | value |= MSR_IA32_APICBASE_BSP; | |
ad312c7c | 914 | vcpu->arch.apic_base = value; |
97222cc8 ED |
915 | return; |
916 | } | |
c5af89b6 GN |
917 | |
918 | if (!kvm_vcpu_is_bsp(apic->vcpu)) | |
97222cc8 ED |
919 | value &= ~MSR_IA32_APICBASE_BSP; |
920 | ||
ad312c7c | 921 | vcpu->arch.apic_base = value; |
0105d1a5 GN |
922 | if (apic_x2apic_mode(apic)) { |
923 | u32 id = kvm_apic_id(apic); | |
924 | u32 ldr = ((id & ~0xf) << 16) | (1 << (id & 0xf)); | |
925 | apic_set_reg(apic, APIC_LDR, ldr); | |
926 | } | |
ad312c7c | 927 | apic->base_address = apic->vcpu->arch.apic_base & |
97222cc8 ED |
928 | MSR_IA32_APICBASE_BASE; |
929 | ||
930 | /* with FSB delivery interrupt, we can restart APIC functionality */ | |
931 | apic_debug("apic base msr is 0x%016" PRIx64 ", and base address is " | |
ad312c7c | 932 | "0x%lx.\n", apic->vcpu->arch.apic_base, apic->base_address); |
97222cc8 ED |
933 | |
934 | } | |
935 | ||
c5ec1534 | 936 | void kvm_lapic_reset(struct kvm_vcpu *vcpu) |
97222cc8 ED |
937 | { |
938 | struct kvm_lapic *apic; | |
939 | int i; | |
940 | ||
b8688d51 | 941 | apic_debug("%s\n", __func__); |
97222cc8 ED |
942 | |
943 | ASSERT(vcpu); | |
ad312c7c | 944 | apic = vcpu->arch.apic; |
97222cc8 ED |
945 | ASSERT(apic != NULL); |
946 | ||
947 | /* Stop the timer in case it's a reset to an active apic */ | |
d3c7b77d | 948 | hrtimer_cancel(&apic->lapic_timer.timer); |
97222cc8 ED |
949 | |
950 | apic_set_reg(apic, APIC_ID, vcpu->vcpu_id << 24); | |
fc61b800 | 951 | kvm_apic_set_version(apic->vcpu); |
97222cc8 ED |
952 | |
953 | for (i = 0; i < APIC_LVT_NUM; i++) | |
954 | apic_set_reg(apic, APIC_LVTT + 0x10 * i, APIC_LVT_MASKED); | |
40487c68 QH |
955 | apic_set_reg(apic, APIC_LVT0, |
956 | SET_APIC_DELIVERY_MODE(0, APIC_MODE_EXTINT)); | |
97222cc8 ED |
957 | |
958 | apic_set_reg(apic, APIC_DFR, 0xffffffffU); | |
959 | apic_set_reg(apic, APIC_SPIV, 0xff); | |
960 | apic_set_reg(apic, APIC_TASKPRI, 0); | |
961 | apic_set_reg(apic, APIC_LDR, 0); | |
962 | apic_set_reg(apic, APIC_ESR, 0); | |
963 | apic_set_reg(apic, APIC_ICR, 0); | |
964 | apic_set_reg(apic, APIC_ICR2, 0); | |
965 | apic_set_reg(apic, APIC_TDCR, 0); | |
966 | apic_set_reg(apic, APIC_TMICT, 0); | |
967 | for (i = 0; i < 8; i++) { | |
968 | apic_set_reg(apic, APIC_IRR + 0x10 * i, 0); | |
969 | apic_set_reg(apic, APIC_ISR + 0x10 * i, 0); | |
970 | apic_set_reg(apic, APIC_TMR + 0x10 * i, 0); | |
971 | } | |
33e4c686 | 972 | apic->irr_pending = false; |
b33ac88b | 973 | update_divide_count(apic); |
d3c7b77d | 974 | atomic_set(&apic->lapic_timer.pending, 0); |
c5af89b6 | 975 | if (kvm_vcpu_is_bsp(vcpu)) |
ad312c7c | 976 | vcpu->arch.apic_base |= MSR_IA32_APICBASE_BSP; |
97222cc8 ED |
977 | apic_update_ppr(apic); |
978 | ||
e1035715 GN |
979 | vcpu->arch.apic_arb_prio = 0; |
980 | ||
97222cc8 | 981 | apic_debug(KERN_INFO "%s: vcpu=%p, id=%d, base_msr=" |
b8688d51 | 982 | "0x%016" PRIx64 ", base_address=0x%0lx.\n", __func__, |
97222cc8 | 983 | vcpu, kvm_apic_id(apic), |
ad312c7c | 984 | vcpu->arch.apic_base, apic->base_address); |
97222cc8 ED |
985 | } |
986 | ||
343f94fe | 987 | bool kvm_apic_present(struct kvm_vcpu *vcpu) |
97222cc8 | 988 | { |
343f94fe GN |
989 | return vcpu->arch.apic && apic_hw_enabled(vcpu->arch.apic); |
990 | } | |
97222cc8 | 991 | |
343f94fe GN |
992 | int kvm_lapic_enabled(struct kvm_vcpu *vcpu) |
993 | { | |
994 | return kvm_apic_present(vcpu) && apic_sw_enabled(vcpu->arch.apic); | |
97222cc8 ED |
995 | } |
996 | ||
997 | /* | |
998 | *---------------------------------------------------------------------- | |
999 | * timer interface | |
1000 | *---------------------------------------------------------------------- | |
1001 | */ | |
1b9778da | 1002 | |
d3c7b77d | 1003 | static bool lapic_is_periodic(struct kvm_timer *ktimer) |
97222cc8 | 1004 | { |
d3c7b77d MT |
1005 | struct kvm_lapic *apic = container_of(ktimer, struct kvm_lapic, |
1006 | lapic_timer); | |
1007 | return apic_lvtt_period(apic); | |
97222cc8 ED |
1008 | } |
1009 | ||
3d80840d MT |
1010 | int apic_has_pending_timer(struct kvm_vcpu *vcpu) |
1011 | { | |
1012 | struct kvm_lapic *lapic = vcpu->arch.apic; | |
1013 | ||
54aaacee | 1014 | if (lapic && apic_enabled(lapic) && apic_lvt_enabled(lapic, APIC_LVTT)) |
d3c7b77d | 1015 | return atomic_read(&lapic->lapic_timer.pending); |
3d80840d MT |
1016 | |
1017 | return 0; | |
1018 | } | |
1019 | ||
8fdb2351 | 1020 | static int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type) |
1b9778da | 1021 | { |
8fdb2351 | 1022 | u32 reg = apic_get_reg(apic, lvt_type); |
23930f95 | 1023 | int vector, mode, trig_mode; |
23930f95 | 1024 | |
8fdb2351 | 1025 | if (apic_hw_enabled(apic) && !(reg & APIC_LVT_MASKED)) { |
23930f95 JK |
1026 | vector = reg & APIC_VECTOR_MASK; |
1027 | mode = reg & APIC_MODE_MASK; | |
1028 | trig_mode = reg & APIC_LVT_LEVEL_TRIGGER; | |
1029 | return __apic_accept_irq(apic, mode, vector, 1, trig_mode); | |
1030 | } | |
1031 | return 0; | |
1032 | } | |
1b9778da | 1033 | |
8fdb2351 | 1034 | void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu) |
23930f95 | 1035 | { |
8fdb2351 JK |
1036 | struct kvm_lapic *apic = vcpu->arch.apic; |
1037 | ||
1038 | if (apic) | |
1039 | kvm_apic_local_deliver(apic, APIC_LVT0); | |
1b9778da ED |
1040 | } |
1041 | ||
386eb6e8 | 1042 | static struct kvm_timer_ops lapic_timer_ops = { |
d3c7b77d MT |
1043 | .is_periodic = lapic_is_periodic, |
1044 | }; | |
97222cc8 | 1045 | |
d76685c4 GH |
1046 | static const struct kvm_io_device_ops apic_mmio_ops = { |
1047 | .read = apic_mmio_read, | |
1048 | .write = apic_mmio_write, | |
d76685c4 GH |
1049 | }; |
1050 | ||
97222cc8 ED |
1051 | int kvm_create_lapic(struct kvm_vcpu *vcpu) |
1052 | { | |
1053 | struct kvm_lapic *apic; | |
1054 | ||
1055 | ASSERT(vcpu != NULL); | |
1056 | apic_debug("apic_init %d\n", vcpu->vcpu_id); | |
1057 | ||
1058 | apic = kzalloc(sizeof(*apic), GFP_KERNEL); | |
1059 | if (!apic) | |
1060 | goto nomem; | |
1061 | ||
ad312c7c | 1062 | vcpu->arch.apic = apic; |
97222cc8 | 1063 | |
afc20184 TY |
1064 | apic->regs = (void *)get_zeroed_page(GFP_KERNEL); |
1065 | if (!apic->regs) { | |
97222cc8 ED |
1066 | printk(KERN_ERR "malloc apic regs error for vcpu %x\n", |
1067 | vcpu->vcpu_id); | |
d589444e | 1068 | goto nomem_free_apic; |
97222cc8 | 1069 | } |
97222cc8 ED |
1070 | apic->vcpu = vcpu; |
1071 | ||
d3c7b77d MT |
1072 | hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC, |
1073 | HRTIMER_MODE_ABS); | |
1074 | apic->lapic_timer.timer.function = kvm_timer_fn; | |
1075 | apic->lapic_timer.t_ops = &lapic_timer_ops; | |
1076 | apic->lapic_timer.kvm = vcpu->kvm; | |
1ed0ce00 | 1077 | apic->lapic_timer.vcpu = vcpu; |
d3c7b77d | 1078 | |
97222cc8 | 1079 | apic->base_address = APIC_DEFAULT_PHYS_BASE; |
ad312c7c | 1080 | vcpu->arch.apic_base = APIC_DEFAULT_PHYS_BASE; |
97222cc8 | 1081 | |
c5ec1534 | 1082 | kvm_lapic_reset(vcpu); |
d76685c4 | 1083 | kvm_iodevice_init(&apic->dev, &apic_mmio_ops); |
97222cc8 ED |
1084 | |
1085 | return 0; | |
d589444e RR |
1086 | nomem_free_apic: |
1087 | kfree(apic); | |
97222cc8 | 1088 | nomem: |
97222cc8 ED |
1089 | return -ENOMEM; |
1090 | } | |
97222cc8 ED |
1091 | |
1092 | int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu) | |
1093 | { | |
ad312c7c | 1094 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
1095 | int highest_irr; |
1096 | ||
1097 | if (!apic || !apic_enabled(apic)) | |
1098 | return -1; | |
1099 | ||
6e5d865c | 1100 | apic_update_ppr(apic); |
97222cc8 ED |
1101 | highest_irr = apic_find_highest_irr(apic); |
1102 | if ((highest_irr == -1) || | |
1103 | ((highest_irr & 0xF0) <= apic_get_reg(apic, APIC_PROCPRI))) | |
1104 | return -1; | |
1105 | return highest_irr; | |
1106 | } | |
1107 | ||
40487c68 QH |
1108 | int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu) |
1109 | { | |
ad312c7c | 1110 | u32 lvt0 = apic_get_reg(vcpu->arch.apic, APIC_LVT0); |
40487c68 QH |
1111 | int r = 0; |
1112 | ||
e7dca5c0 CL |
1113 | if (!apic_hw_enabled(vcpu->arch.apic)) |
1114 | r = 1; | |
1115 | if ((lvt0 & APIC_LVT_MASKED) == 0 && | |
1116 | GET_APIC_DELIVERY_MODE(lvt0) == APIC_MODE_EXTINT) | |
1117 | r = 1; | |
40487c68 QH |
1118 | return r; |
1119 | } | |
1120 | ||
1b9778da ED |
1121 | void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu) |
1122 | { | |
ad312c7c | 1123 | struct kvm_lapic *apic = vcpu->arch.apic; |
1b9778da | 1124 | |
d3c7b77d | 1125 | if (apic && atomic_read(&apic->lapic_timer.pending) > 0) { |
8fdb2351 | 1126 | if (kvm_apic_local_deliver(apic, APIC_LVTT)) |
d3c7b77d | 1127 | atomic_dec(&apic->lapic_timer.pending); |
1b9778da ED |
1128 | } |
1129 | } | |
1130 | ||
97222cc8 ED |
1131 | int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu) |
1132 | { | |
1133 | int vector = kvm_apic_has_interrupt(vcpu); | |
ad312c7c | 1134 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
1135 | |
1136 | if (vector == -1) | |
1137 | return -1; | |
1138 | ||
1139 | apic_set_vector(vector, apic->regs + APIC_ISR); | |
1140 | apic_update_ppr(apic); | |
1141 | apic_clear_irr(vector, apic); | |
1142 | return vector; | |
1143 | } | |
96ad2cc6 ED |
1144 | |
1145 | void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu) | |
1146 | { | |
ad312c7c | 1147 | struct kvm_lapic *apic = vcpu->arch.apic; |
96ad2cc6 | 1148 | |
ad312c7c | 1149 | apic->base_address = vcpu->arch.apic_base & |
96ad2cc6 | 1150 | MSR_IA32_APICBASE_BASE; |
fc61b800 GN |
1151 | kvm_apic_set_version(vcpu); |
1152 | ||
96ad2cc6 | 1153 | apic_update_ppr(apic); |
d3c7b77d | 1154 | hrtimer_cancel(&apic->lapic_timer.timer); |
96ad2cc6 ED |
1155 | update_divide_count(apic); |
1156 | start_apic_timer(apic); | |
6e24a6ef | 1157 | apic->irr_pending = true; |
3842d135 | 1158 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
96ad2cc6 | 1159 | } |
a3d7f85f | 1160 | |
2f52d58c | 1161 | void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) |
a3d7f85f | 1162 | { |
ad312c7c | 1163 | struct kvm_lapic *apic = vcpu->arch.apic; |
a3d7f85f ED |
1164 | struct hrtimer *timer; |
1165 | ||
1166 | if (!apic) | |
1167 | return; | |
1168 | ||
d3c7b77d | 1169 | timer = &apic->lapic_timer.timer; |
a3d7f85f | 1170 | if (hrtimer_cancel(timer)) |
beb20d52 | 1171 | hrtimer_start_expires(timer, HRTIMER_MODE_ABS); |
a3d7f85f | 1172 | } |
b93463aa AK |
1173 | |
1174 | void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu) | |
1175 | { | |
1176 | u32 data; | |
1177 | void *vapic; | |
1178 | ||
1179 | if (!irqchip_in_kernel(vcpu->kvm) || !vcpu->arch.apic->vapic_addr) | |
1180 | return; | |
1181 | ||
1182 | vapic = kmap_atomic(vcpu->arch.apic->vapic_page, KM_USER0); | |
1183 | data = *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr)); | |
1184 | kunmap_atomic(vapic, KM_USER0); | |
1185 | ||
1186 | apic_set_tpr(vcpu->arch.apic, data & 0xff); | |
1187 | } | |
1188 | ||
1189 | void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu) | |
1190 | { | |
1191 | u32 data, tpr; | |
1192 | int max_irr, max_isr; | |
1193 | struct kvm_lapic *apic; | |
1194 | void *vapic; | |
1195 | ||
1196 | if (!irqchip_in_kernel(vcpu->kvm) || !vcpu->arch.apic->vapic_addr) | |
1197 | return; | |
1198 | ||
1199 | apic = vcpu->arch.apic; | |
1200 | tpr = apic_get_reg(apic, APIC_TASKPRI) & 0xff; | |
1201 | max_irr = apic_find_highest_irr(apic); | |
1202 | if (max_irr < 0) | |
1203 | max_irr = 0; | |
1204 | max_isr = apic_find_highest_isr(apic); | |
1205 | if (max_isr < 0) | |
1206 | max_isr = 0; | |
1207 | data = (tpr & 0xff) | ((max_isr & 0xf0) << 8) | (max_irr << 24); | |
1208 | ||
1209 | vapic = kmap_atomic(vcpu->arch.apic->vapic_page, KM_USER0); | |
1210 | *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr)) = data; | |
1211 | kunmap_atomic(vapic, KM_USER0); | |
1212 | } | |
1213 | ||
1214 | void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr) | |
1215 | { | |
1216 | if (!irqchip_in_kernel(vcpu->kvm)) | |
1217 | return; | |
1218 | ||
1219 | vcpu->arch.apic->vapic_addr = vapic_addr; | |
1220 | } | |
0105d1a5 GN |
1221 | |
1222 | int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1223 | { | |
1224 | struct kvm_lapic *apic = vcpu->arch.apic; | |
1225 | u32 reg = (msr - APIC_BASE_MSR) << 4; | |
1226 | ||
1227 | if (!irqchip_in_kernel(vcpu->kvm) || !apic_x2apic_mode(apic)) | |
1228 | return 1; | |
1229 | ||
1230 | /* if this is ICR write vector before command */ | |
1231 | if (msr == 0x830) | |
1232 | apic_reg_write(apic, APIC_ICR2, (u32)(data >> 32)); | |
1233 | return apic_reg_write(apic, reg, (u32)data); | |
1234 | } | |
1235 | ||
1236 | int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data) | |
1237 | { | |
1238 | struct kvm_lapic *apic = vcpu->arch.apic; | |
1239 | u32 reg = (msr - APIC_BASE_MSR) << 4, low, high = 0; | |
1240 | ||
1241 | if (!irqchip_in_kernel(vcpu->kvm) || !apic_x2apic_mode(apic)) | |
1242 | return 1; | |
1243 | ||
1244 | if (apic_reg_read(apic, reg, 4, &low)) | |
1245 | return 1; | |
1246 | if (msr == 0x830) | |
1247 | apic_reg_read(apic, APIC_ICR2, 4, &high); | |
1248 | ||
1249 | *data = (((u64)high) << 32) | low; | |
1250 | ||
1251 | return 0; | |
1252 | } | |
10388a07 GN |
1253 | |
1254 | int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 reg, u64 data) | |
1255 | { | |
1256 | struct kvm_lapic *apic = vcpu->arch.apic; | |
1257 | ||
1258 | if (!irqchip_in_kernel(vcpu->kvm)) | |
1259 | return 1; | |
1260 | ||
1261 | /* if this is ICR write vector before command */ | |
1262 | if (reg == APIC_ICR) | |
1263 | apic_reg_write(apic, APIC_ICR2, (u32)(data >> 32)); | |
1264 | return apic_reg_write(apic, reg, (u32)data); | |
1265 | } | |
1266 | ||
1267 | int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 reg, u64 *data) | |
1268 | { | |
1269 | struct kvm_lapic *apic = vcpu->arch.apic; | |
1270 | u32 low, high = 0; | |
1271 | ||
1272 | if (!irqchip_in_kernel(vcpu->kvm)) | |
1273 | return 1; | |
1274 | ||
1275 | if (apic_reg_read(apic, reg, 4, &low)) | |
1276 | return 1; | |
1277 | if (reg == APIC_ICR) | |
1278 | apic_reg_read(apic, APIC_ICR2, 4, &high); | |
1279 | ||
1280 | *data = (((u64)high) << 32) | low; | |
1281 | ||
1282 | return 0; | |
1283 | } |