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