Commit | Line | Data |
---|---|---|
97222cc8 ED |
1 | |
2 | /* | |
3 | * Local APIC virtualization | |
4 | * | |
5 | * Copyright (C) 2006 Qumranet, Inc. | |
6 | * Copyright (C) 2007 Novell | |
7 | * Copyright (C) 2007 Intel | |
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> |
c5cc421b | 37 | #include <linux/jump_label.h> |
5fdbf976 | 38 | #include "kvm_cache_regs.h" |
97222cc8 | 39 | #include "irq.h" |
229456fc | 40 | #include "trace.h" |
fc61b800 | 41 | #include "x86.h" |
00b27a3e | 42 | #include "cpuid.h" |
97222cc8 | 43 | |
b682b814 MT |
44 | #ifndef CONFIG_X86_64 |
45 | #define mod_64(x, y) ((x) - (y) * div64_u64(x, y)) | |
46 | #else | |
47 | #define mod_64(x, y) ((x) % (y)) | |
48 | #endif | |
49 | ||
97222cc8 ED |
50 | #define PRId64 "d" |
51 | #define PRIx64 "llx" | |
52 | #define PRIu64 "u" | |
53 | #define PRIo64 "o" | |
54 | ||
55 | #define APIC_BUS_CYCLE_NS 1 | |
56 | ||
57 | /* #define apic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg) */ | |
58 | #define apic_debug(fmt, arg...) | |
59 | ||
60 | #define APIC_LVT_NUM 6 | |
61 | /* 14 is the version for Xeon and Pentium 8.4.8*/ | |
62 | #define APIC_VERSION (0x14UL | ((APIC_LVT_NUM - 1) << 16)) | |
63 | #define LAPIC_MMIO_LENGTH (1 << 12) | |
64 | /* followed define is not in apicdef.h */ | |
65 | #define APIC_SHORT_MASK 0xc0000 | |
66 | #define APIC_DEST_NOSHORT 0x0 | |
67 | #define APIC_DEST_MASK 0x800 | |
68 | #define MAX_APIC_VECTOR 256 | |
ecba9a52 | 69 | #define APIC_VECTORS_PER_REG 32 |
97222cc8 | 70 | |
394457a9 NA |
71 | #define APIC_BROADCAST 0xFF |
72 | #define X2APIC_BROADCAST 0xFFFFFFFFul | |
73 | ||
97222cc8 ED |
74 | #define VEC_POS(v) ((v) & (32 - 1)) |
75 | #define REG_POS(v) (((v) >> 5) << 4) | |
ad312c7c | 76 | |
97222cc8 ED |
77 | static inline void apic_set_reg(struct kvm_lapic *apic, int reg_off, u32 val) |
78 | { | |
79 | *((u32 *) (apic->regs + reg_off)) = val; | |
80 | } | |
81 | ||
a0c9a822 MT |
82 | static inline int apic_test_vector(int vec, void *bitmap) |
83 | { | |
84 | return test_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); | |
85 | } | |
86 | ||
10606919 YZ |
87 | bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector) |
88 | { | |
89 | struct kvm_lapic *apic = vcpu->arch.apic; | |
90 | ||
91 | return apic_test_vector(vector, apic->regs + APIC_ISR) || | |
92 | apic_test_vector(vector, apic->regs + APIC_IRR); | |
93 | } | |
94 | ||
97222cc8 ED |
95 | static inline void apic_set_vector(int vec, void *bitmap) |
96 | { | |
97 | set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); | |
98 | } | |
99 | ||
100 | static inline void apic_clear_vector(int vec, void *bitmap) | |
101 | { | |
102 | clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); | |
103 | } | |
104 | ||
8680b94b MT |
105 | static inline int __apic_test_and_set_vector(int vec, void *bitmap) |
106 | { | |
107 | return __test_and_set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); | |
108 | } | |
109 | ||
110 | static inline int __apic_test_and_clear_vector(int vec, void *bitmap) | |
111 | { | |
112 | return __test_and_clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); | |
113 | } | |
114 | ||
c5cc421b | 115 | struct static_key_deferred apic_hw_disabled __read_mostly; |
f8c1ea10 GN |
116 | struct static_key_deferred apic_sw_disabled __read_mostly; |
117 | ||
97222cc8 ED |
118 | static inline int apic_enabled(struct kvm_lapic *apic) |
119 | { | |
c48f1496 | 120 | return kvm_apic_sw_enabled(apic) && kvm_apic_hw_enabled(apic); |
54e9818f GN |
121 | } |
122 | ||
97222cc8 ED |
123 | #define LVT_MASK \ |
124 | (APIC_LVT_MASKED | APIC_SEND_PENDING | APIC_VECTOR_MASK) | |
125 | ||
126 | #define LINT_MASK \ | |
127 | (LVT_MASK | APIC_MODE_MASK | APIC_INPUT_POLARITY | \ | |
128 | APIC_LVT_REMOTE_IRR | APIC_LVT_LEVEL_TRIGGER) | |
129 | ||
130 | static inline int kvm_apic_id(struct kvm_lapic *apic) | |
131 | { | |
c48f1496 | 132 | return (kvm_apic_get_reg(apic, APIC_ID) >> 24) & 0xff; |
97222cc8 ED |
133 | } |
134 | ||
17d68b76 GN |
135 | #define KVM_X2APIC_CID_BITS 0 |
136 | ||
1e08ec4a GN |
137 | static void recalculate_apic_map(struct kvm *kvm) |
138 | { | |
139 | struct kvm_apic_map *new, *old = NULL; | |
140 | struct kvm_vcpu *vcpu; | |
141 | int i; | |
142 | ||
143 | new = kzalloc(sizeof(struct kvm_apic_map), GFP_KERNEL); | |
144 | ||
145 | mutex_lock(&kvm->arch.apic_map_lock); | |
146 | ||
147 | if (!new) | |
148 | goto out; | |
149 | ||
150 | new->ldr_bits = 8; | |
151 | /* flat mode is default */ | |
152 | new->cid_shift = 8; | |
153 | new->cid_mask = 0; | |
154 | new->lid_mask = 0xff; | |
394457a9 | 155 | new->broadcast = APIC_BROADCAST; |
1e08ec4a GN |
156 | |
157 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
158 | struct kvm_lapic *apic = vcpu->arch.apic; | |
1e08ec4a GN |
159 | |
160 | if (!kvm_apic_present(vcpu)) | |
161 | continue; | |
162 | ||
1e08ec4a GN |
163 | if (apic_x2apic_mode(apic)) { |
164 | new->ldr_bits = 32; | |
165 | new->cid_shift = 16; | |
17d68b76 GN |
166 | new->cid_mask = (1 << KVM_X2APIC_CID_BITS) - 1; |
167 | new->lid_mask = 0xffff; | |
394457a9 | 168 | new->broadcast = X2APIC_BROADCAST; |
a3e339e1 | 169 | } else if (kvm_apic_get_reg(apic, APIC_LDR)) { |
173beedc NA |
170 | if (kvm_apic_get_reg(apic, APIC_DFR) == |
171 | APIC_DFR_CLUSTER) { | |
172 | new->cid_shift = 4; | |
173 | new->cid_mask = 0xf; | |
174 | new->lid_mask = 0xf; | |
a3e339e1 PB |
175 | } else { |
176 | new->cid_shift = 8; | |
177 | new->cid_mask = 0; | |
178 | new->lid_mask = 0xff; | |
173beedc | 179 | } |
1e08ec4a | 180 | } |
a3e339e1 PB |
181 | |
182 | /* | |
183 | * All APICs have to be configured in the same mode by an OS. | |
184 | * We take advatage of this while building logical id loockup | |
185 | * table. After reset APICs are in software disabled mode, so if | |
186 | * we find apic with different setting we assume this is the mode | |
187 | * OS wants all apics to be in; build lookup table accordingly. | |
188 | */ | |
189 | if (kvm_apic_sw_enabled(apic)) | |
190 | break; | |
173beedc NA |
191 | } |
192 | ||
193 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
194 | struct kvm_lapic *apic = vcpu->arch.apic; | |
195 | u16 cid, lid; | |
196 | u32 ldr; | |
1e08ec4a GN |
197 | |
198 | new->phys_map[kvm_apic_id(apic)] = apic; | |
199 | ||
200 | ldr = kvm_apic_get_reg(apic, APIC_LDR); | |
201 | cid = apic_cluster_id(new, ldr); | |
202 | lid = apic_logical_id(new, ldr); | |
203 | ||
204 | if (lid) | |
205 | new->logical_map[cid][ffs(lid) - 1] = apic; | |
206 | } | |
207 | out: | |
208 | old = rcu_dereference_protected(kvm->arch.apic_map, | |
209 | lockdep_is_held(&kvm->arch.apic_map_lock)); | |
210 | rcu_assign_pointer(kvm->arch.apic_map, new); | |
211 | mutex_unlock(&kvm->arch.apic_map_lock); | |
212 | ||
213 | if (old) | |
214 | kfree_rcu(old, rcu); | |
c7c9c56c | 215 | |
3d81bc7e | 216 | kvm_vcpu_request_scan_ioapic(kvm); |
1e08ec4a GN |
217 | } |
218 | ||
1e1b6c26 NA |
219 | static inline void apic_set_spiv(struct kvm_lapic *apic, u32 val) |
220 | { | |
e462755c | 221 | bool enabled = val & APIC_SPIV_APIC_ENABLED; |
1e1b6c26 NA |
222 | |
223 | apic_set_reg(apic, APIC_SPIV, val); | |
e462755c RK |
224 | |
225 | if (enabled != apic->sw_enabled) { | |
226 | apic->sw_enabled = enabled; | |
227 | if (enabled) { | |
1e1b6c26 NA |
228 | static_key_slow_dec_deferred(&apic_sw_disabled); |
229 | recalculate_apic_map(apic->vcpu->kvm); | |
230 | } else | |
231 | static_key_slow_inc(&apic_sw_disabled.key); | |
232 | } | |
233 | } | |
234 | ||
1e08ec4a GN |
235 | static inline void kvm_apic_set_id(struct kvm_lapic *apic, u8 id) |
236 | { | |
237 | apic_set_reg(apic, APIC_ID, id << 24); | |
238 | recalculate_apic_map(apic->vcpu->kvm); | |
239 | } | |
240 | ||
241 | static inline void kvm_apic_set_ldr(struct kvm_lapic *apic, u32 id) | |
242 | { | |
243 | apic_set_reg(apic, APIC_LDR, id); | |
244 | recalculate_apic_map(apic->vcpu->kvm); | |
245 | } | |
246 | ||
97222cc8 ED |
247 | static inline int apic_lvt_enabled(struct kvm_lapic *apic, int lvt_type) |
248 | { | |
c48f1496 | 249 | return !(kvm_apic_get_reg(apic, lvt_type) & APIC_LVT_MASKED); |
97222cc8 ED |
250 | } |
251 | ||
252 | static inline int apic_lvt_vector(struct kvm_lapic *apic, int lvt_type) | |
253 | { | |
c48f1496 | 254 | return kvm_apic_get_reg(apic, lvt_type) & APIC_VECTOR_MASK; |
97222cc8 ED |
255 | } |
256 | ||
a3e06bbe LJ |
257 | static inline int apic_lvtt_oneshot(struct kvm_lapic *apic) |
258 | { | |
f30ebc31 | 259 | return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_ONESHOT; |
a3e06bbe LJ |
260 | } |
261 | ||
97222cc8 ED |
262 | static inline int apic_lvtt_period(struct kvm_lapic *apic) |
263 | { | |
f30ebc31 | 264 | return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_PERIODIC; |
a3e06bbe LJ |
265 | } |
266 | ||
267 | static inline int apic_lvtt_tscdeadline(struct kvm_lapic *apic) | |
268 | { | |
f30ebc31 | 269 | return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_TSCDEADLINE; |
97222cc8 ED |
270 | } |
271 | ||
cc6e462c JK |
272 | static inline int apic_lvt_nmi_mode(u32 lvt_val) |
273 | { | |
274 | return (lvt_val & (APIC_MODE_MASK | APIC_LVT_MASKED)) == APIC_DM_NMI; | |
275 | } | |
276 | ||
fc61b800 GN |
277 | void kvm_apic_set_version(struct kvm_vcpu *vcpu) |
278 | { | |
279 | struct kvm_lapic *apic = vcpu->arch.apic; | |
280 | struct kvm_cpuid_entry2 *feat; | |
281 | u32 v = APIC_VERSION; | |
282 | ||
c48f1496 | 283 | if (!kvm_vcpu_has_lapic(vcpu)) |
fc61b800 GN |
284 | return; |
285 | ||
286 | feat = kvm_find_cpuid_entry(apic->vcpu, 0x1, 0); | |
287 | if (feat && (feat->ecx & (1 << (X86_FEATURE_X2APIC & 31)))) | |
288 | v |= APIC_LVR_DIRECTED_EOI; | |
289 | apic_set_reg(apic, APIC_LVR, v); | |
290 | } | |
291 | ||
f1d24831 | 292 | static const unsigned int apic_lvt_mask[APIC_LVT_NUM] = { |
a3e06bbe | 293 | LVT_MASK , /* part LVTT mask, timer mode mask added at runtime */ |
97222cc8 ED |
294 | LVT_MASK | APIC_MODE_MASK, /* LVTTHMR */ |
295 | LVT_MASK | APIC_MODE_MASK, /* LVTPC */ | |
296 | LINT_MASK, LINT_MASK, /* LVT0-1 */ | |
297 | LVT_MASK /* LVTERR */ | |
298 | }; | |
299 | ||
300 | static int find_highest_vector(void *bitmap) | |
301 | { | |
ecba9a52 TY |
302 | int vec; |
303 | u32 *reg; | |
97222cc8 | 304 | |
ecba9a52 TY |
305 | for (vec = MAX_APIC_VECTOR - APIC_VECTORS_PER_REG; |
306 | vec >= 0; vec -= APIC_VECTORS_PER_REG) { | |
307 | reg = bitmap + REG_POS(vec); | |
308 | if (*reg) | |
309 | return fls(*reg) - 1 + vec; | |
310 | } | |
97222cc8 | 311 | |
ecba9a52 | 312 | return -1; |
97222cc8 ED |
313 | } |
314 | ||
8680b94b MT |
315 | static u8 count_vectors(void *bitmap) |
316 | { | |
ecba9a52 TY |
317 | int vec; |
318 | u32 *reg; | |
8680b94b | 319 | u8 count = 0; |
ecba9a52 TY |
320 | |
321 | for (vec = 0; vec < MAX_APIC_VECTOR; vec += APIC_VECTORS_PER_REG) { | |
322 | reg = bitmap + REG_POS(vec); | |
323 | count += hweight32(*reg); | |
324 | } | |
325 | ||
8680b94b MT |
326 | return count; |
327 | } | |
328 | ||
a20ed54d YZ |
329 | void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir) |
330 | { | |
331 | u32 i, pir_val; | |
332 | struct kvm_lapic *apic = vcpu->arch.apic; | |
333 | ||
334 | for (i = 0; i <= 7; i++) { | |
335 | pir_val = xchg(&pir[i], 0); | |
336 | if (pir_val) | |
337 | *((u32 *)(apic->regs + APIC_IRR + i * 0x10)) |= pir_val; | |
338 | } | |
339 | } | |
340 | EXPORT_SYMBOL_GPL(kvm_apic_update_irr); | |
341 | ||
11f5cc05 | 342 | static inline void apic_set_irr(int vec, struct kvm_lapic *apic) |
97222cc8 | 343 | { |
11f5cc05 | 344 | apic_set_vector(vec, apic->regs + APIC_IRR); |
f210f757 NA |
345 | /* |
346 | * irr_pending must be true if any interrupt is pending; set it after | |
347 | * APIC_IRR to avoid race with apic_clear_irr | |
348 | */ | |
349 | apic->irr_pending = true; | |
97222cc8 ED |
350 | } |
351 | ||
33e4c686 | 352 | static inline int apic_search_irr(struct kvm_lapic *apic) |
97222cc8 | 353 | { |
33e4c686 | 354 | return find_highest_vector(apic->regs + APIC_IRR); |
97222cc8 ED |
355 | } |
356 | ||
357 | static inline int apic_find_highest_irr(struct kvm_lapic *apic) | |
358 | { | |
359 | int result; | |
360 | ||
c7c9c56c YZ |
361 | /* |
362 | * Note that irr_pending is just a hint. It will be always | |
363 | * true with virtual interrupt delivery enabled. | |
364 | */ | |
33e4c686 GN |
365 | if (!apic->irr_pending) |
366 | return -1; | |
367 | ||
5a71785d | 368 | kvm_x86_ops->sync_pir_to_irr(apic->vcpu); |
33e4c686 | 369 | result = apic_search_irr(apic); |
97222cc8 ED |
370 | ASSERT(result == -1 || result >= 16); |
371 | ||
372 | return result; | |
373 | } | |
374 | ||
33e4c686 GN |
375 | static inline void apic_clear_irr(int vec, struct kvm_lapic *apic) |
376 | { | |
56cc2406 WL |
377 | struct kvm_vcpu *vcpu; |
378 | ||
379 | vcpu = apic->vcpu; | |
380 | ||
f210f757 | 381 | if (unlikely(kvm_apic_vid_enabled(vcpu->kvm))) { |
56cc2406 | 382 | /* try to update RVI */ |
f210f757 | 383 | apic_clear_vector(vec, apic->regs + APIC_IRR); |
56cc2406 | 384 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f210f757 NA |
385 | } else { |
386 | apic->irr_pending = false; | |
387 | apic_clear_vector(vec, apic->regs + APIC_IRR); | |
388 | if (apic_search_irr(apic) != -1) | |
389 | apic->irr_pending = true; | |
56cc2406 | 390 | } |
33e4c686 GN |
391 | } |
392 | ||
8680b94b MT |
393 | static inline void apic_set_isr(int vec, struct kvm_lapic *apic) |
394 | { | |
56cc2406 WL |
395 | struct kvm_vcpu *vcpu; |
396 | ||
397 | if (__apic_test_and_set_vector(vec, apic->regs + APIC_ISR)) | |
398 | return; | |
399 | ||
400 | vcpu = apic->vcpu; | |
fc57ac2c | 401 | |
8680b94b | 402 | /* |
56cc2406 WL |
403 | * With APIC virtualization enabled, all caching is disabled |
404 | * because the processor can modify ISR under the hood. Instead | |
405 | * just set SVI. | |
8680b94b | 406 | */ |
56cc2406 WL |
407 | if (unlikely(kvm_apic_vid_enabled(vcpu->kvm))) |
408 | kvm_x86_ops->hwapic_isr_update(vcpu->kvm, vec); | |
409 | else { | |
410 | ++apic->isr_count; | |
411 | BUG_ON(apic->isr_count > MAX_APIC_VECTOR); | |
412 | /* | |
413 | * ISR (in service register) bit is set when injecting an interrupt. | |
414 | * The highest vector is injected. Thus the latest bit set matches | |
415 | * the highest bit in ISR. | |
416 | */ | |
417 | apic->highest_isr_cache = vec; | |
418 | } | |
8680b94b MT |
419 | } |
420 | ||
fc57ac2c PB |
421 | static inline int apic_find_highest_isr(struct kvm_lapic *apic) |
422 | { | |
423 | int result; | |
424 | ||
425 | /* | |
426 | * Note that isr_count is always 1, and highest_isr_cache | |
427 | * is always -1, with APIC virtualization enabled. | |
428 | */ | |
429 | if (!apic->isr_count) | |
430 | return -1; | |
431 | if (likely(apic->highest_isr_cache != -1)) | |
432 | return apic->highest_isr_cache; | |
433 | ||
434 | result = find_highest_vector(apic->regs + APIC_ISR); | |
435 | ASSERT(result == -1 || result >= 16); | |
436 | ||
437 | return result; | |
438 | } | |
439 | ||
8680b94b MT |
440 | static inline void apic_clear_isr(int vec, struct kvm_lapic *apic) |
441 | { | |
fc57ac2c PB |
442 | struct kvm_vcpu *vcpu; |
443 | if (!__apic_test_and_clear_vector(vec, apic->regs + APIC_ISR)) | |
444 | return; | |
445 | ||
446 | vcpu = apic->vcpu; | |
447 | ||
448 | /* | |
449 | * We do get here for APIC virtualization enabled if the guest | |
450 | * uses the Hyper-V APIC enlightenment. In this case we may need | |
451 | * to trigger a new interrupt delivery by writing the SVI field; | |
452 | * on the other hand isr_count and highest_isr_cache are unused | |
453 | * and must be left alone. | |
454 | */ | |
455 | if (unlikely(kvm_apic_vid_enabled(vcpu->kvm))) | |
456 | kvm_x86_ops->hwapic_isr_update(vcpu->kvm, | |
457 | apic_find_highest_isr(apic)); | |
458 | else { | |
8680b94b | 459 | --apic->isr_count; |
fc57ac2c PB |
460 | BUG_ON(apic->isr_count < 0); |
461 | apic->highest_isr_cache = -1; | |
462 | } | |
8680b94b MT |
463 | } |
464 | ||
6e5d865c YS |
465 | int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu) |
466 | { | |
6e5d865c YS |
467 | int highest_irr; |
468 | ||
33e4c686 GN |
469 | /* This may race with setting of irr in __apic_accept_irq() and |
470 | * value returned may be wrong, but kvm_vcpu_kick() in __apic_accept_irq | |
471 | * will cause vmexit immediately and the value will be recalculated | |
472 | * on the next vmentry. | |
473 | */ | |
c48f1496 | 474 | if (!kvm_vcpu_has_lapic(vcpu)) |
6e5d865c | 475 | return 0; |
54e9818f | 476 | highest_irr = apic_find_highest_irr(vcpu->arch.apic); |
6e5d865c YS |
477 | |
478 | return highest_irr; | |
479 | } | |
6e5d865c | 480 | |
6da7e3f6 | 481 | static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, |
b4f2225c YZ |
482 | int vector, int level, int trig_mode, |
483 | unsigned long *dest_map); | |
6da7e3f6 | 484 | |
b4f2225c YZ |
485 | int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq, |
486 | unsigned long *dest_map) | |
97222cc8 | 487 | { |
ad312c7c | 488 | struct kvm_lapic *apic = vcpu->arch.apic; |
8be5453f | 489 | |
58c2dde1 | 490 | return __apic_accept_irq(apic, irq->delivery_mode, irq->vector, |
b4f2225c | 491 | irq->level, irq->trig_mode, dest_map); |
97222cc8 ED |
492 | } |
493 | ||
ae7a2a3f MT |
494 | static int pv_eoi_put_user(struct kvm_vcpu *vcpu, u8 val) |
495 | { | |
496 | ||
497 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.pv_eoi.data, &val, | |
498 | sizeof(val)); | |
499 | } | |
500 | ||
501 | static int pv_eoi_get_user(struct kvm_vcpu *vcpu, u8 *val) | |
502 | { | |
503 | ||
504 | return kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.pv_eoi.data, val, | |
505 | sizeof(*val)); | |
506 | } | |
507 | ||
508 | static inline bool pv_eoi_enabled(struct kvm_vcpu *vcpu) | |
509 | { | |
510 | return vcpu->arch.pv_eoi.msr_val & KVM_MSR_ENABLED; | |
511 | } | |
512 | ||
513 | static bool pv_eoi_get_pending(struct kvm_vcpu *vcpu) | |
514 | { | |
515 | u8 val; | |
516 | if (pv_eoi_get_user(vcpu, &val) < 0) | |
517 | apic_debug("Can't read EOI MSR value: 0x%llx\n", | |
96893977 | 518 | (unsigned long long)vcpu->arch.pv_eoi.msr_val); |
ae7a2a3f MT |
519 | return val & 0x1; |
520 | } | |
521 | ||
522 | static void pv_eoi_set_pending(struct kvm_vcpu *vcpu) | |
523 | { | |
524 | if (pv_eoi_put_user(vcpu, KVM_PV_EOI_ENABLED) < 0) { | |
525 | apic_debug("Can't set EOI MSR value: 0x%llx\n", | |
96893977 | 526 | (unsigned long long)vcpu->arch.pv_eoi.msr_val); |
ae7a2a3f MT |
527 | return; |
528 | } | |
529 | __set_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention); | |
530 | } | |
531 | ||
532 | static void pv_eoi_clr_pending(struct kvm_vcpu *vcpu) | |
533 | { | |
534 | if (pv_eoi_put_user(vcpu, KVM_PV_EOI_DISABLED) < 0) { | |
535 | apic_debug("Can't clear EOI MSR value: 0x%llx\n", | |
96893977 | 536 | (unsigned long long)vcpu->arch.pv_eoi.msr_val); |
ae7a2a3f MT |
537 | return; |
538 | } | |
539 | __clear_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention); | |
540 | } | |
541 | ||
cf9e65b7 YZ |
542 | void kvm_apic_update_tmr(struct kvm_vcpu *vcpu, u32 *tmr) |
543 | { | |
544 | struct kvm_lapic *apic = vcpu->arch.apic; | |
545 | int i; | |
546 | ||
547 | for (i = 0; i < 8; i++) | |
548 | apic_set_reg(apic, APIC_TMR + 0x10 * i, tmr[i]); | |
549 | } | |
550 | ||
97222cc8 ED |
551 | static void apic_update_ppr(struct kvm_lapic *apic) |
552 | { | |
3842d135 | 553 | u32 tpr, isrv, ppr, old_ppr; |
97222cc8 ED |
554 | int isr; |
555 | ||
c48f1496 GN |
556 | old_ppr = kvm_apic_get_reg(apic, APIC_PROCPRI); |
557 | tpr = kvm_apic_get_reg(apic, APIC_TASKPRI); | |
97222cc8 ED |
558 | isr = apic_find_highest_isr(apic); |
559 | isrv = (isr != -1) ? isr : 0; | |
560 | ||
561 | if ((tpr & 0xf0) >= (isrv & 0xf0)) | |
562 | ppr = tpr & 0xff; | |
563 | else | |
564 | ppr = isrv & 0xf0; | |
565 | ||
566 | apic_debug("vlapic %p, ppr 0x%x, isr 0x%x, isrv 0x%x", | |
567 | apic, ppr, isr, isrv); | |
568 | ||
3842d135 AK |
569 | if (old_ppr != ppr) { |
570 | apic_set_reg(apic, APIC_PROCPRI, ppr); | |
83bcacb1 AK |
571 | if (ppr < old_ppr) |
572 | kvm_make_request(KVM_REQ_EVENT, apic->vcpu); | |
3842d135 | 573 | } |
97222cc8 ED |
574 | } |
575 | ||
576 | static void apic_set_tpr(struct kvm_lapic *apic, u32 tpr) | |
577 | { | |
578 | apic_set_reg(apic, APIC_TASKPRI, tpr); | |
579 | apic_update_ppr(apic); | |
580 | } | |
581 | ||
394457a9 NA |
582 | static int kvm_apic_broadcast(struct kvm_lapic *apic, u32 dest) |
583 | { | |
584 | return dest == (apic_x2apic_mode(apic) ? | |
585 | X2APIC_BROADCAST : APIC_BROADCAST); | |
586 | } | |
587 | ||
588 | int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u32 dest) | |
97222cc8 | 589 | { |
394457a9 | 590 | return kvm_apic_id(apic) == dest || kvm_apic_broadcast(apic, dest); |
97222cc8 ED |
591 | } |
592 | ||
394457a9 | 593 | int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u32 mda) |
97222cc8 ED |
594 | { |
595 | int result = 0; | |
0105d1a5 GN |
596 | u32 logical_id; |
597 | ||
394457a9 NA |
598 | if (kvm_apic_broadcast(apic, mda)) |
599 | return 1; | |
600 | ||
0105d1a5 | 601 | if (apic_x2apic_mode(apic)) { |
c48f1496 | 602 | logical_id = kvm_apic_get_reg(apic, APIC_LDR); |
0105d1a5 GN |
603 | return logical_id & mda; |
604 | } | |
97222cc8 | 605 | |
c48f1496 | 606 | logical_id = GET_APIC_LOGICAL_ID(kvm_apic_get_reg(apic, APIC_LDR)); |
97222cc8 | 607 | |
c48f1496 | 608 | switch (kvm_apic_get_reg(apic, APIC_DFR)) { |
97222cc8 ED |
609 | case APIC_DFR_FLAT: |
610 | if (logical_id & mda) | |
611 | result = 1; | |
612 | break; | |
613 | case APIC_DFR_CLUSTER: | |
614 | if (((logical_id >> 4) == (mda >> 0x4)) | |
615 | && (logical_id & mda & 0xf)) | |
616 | result = 1; | |
617 | break; | |
618 | default: | |
7712de87 | 619 | apic_debug("Bad DFR vcpu %d: %08x\n", |
c48f1496 | 620 | apic->vcpu->vcpu_id, kvm_apic_get_reg(apic, APIC_DFR)); |
97222cc8 ED |
621 | break; |
622 | } | |
623 | ||
624 | return result; | |
625 | } | |
626 | ||
343f94fe | 627 | int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, |
394457a9 | 628 | int short_hand, unsigned int dest, int dest_mode) |
97222cc8 ED |
629 | { |
630 | int result = 0; | |
ad312c7c | 631 | struct kvm_lapic *target = vcpu->arch.apic; |
97222cc8 ED |
632 | |
633 | apic_debug("target %p, source %p, dest 0x%x, " | |
343f94fe | 634 | "dest_mode 0x%x, short_hand 0x%x\n", |
97222cc8 ED |
635 | target, source, dest, dest_mode, short_hand); |
636 | ||
bd371396 | 637 | ASSERT(target); |
97222cc8 ED |
638 | switch (short_hand) { |
639 | case APIC_DEST_NOSHORT: | |
343f94fe | 640 | if (dest_mode == 0) |
97222cc8 | 641 | /* Physical mode. */ |
343f94fe GN |
642 | result = kvm_apic_match_physical_addr(target, dest); |
643 | else | |
97222cc8 ED |
644 | /* Logical mode. */ |
645 | result = kvm_apic_match_logical_addr(target, dest); | |
646 | break; | |
647 | case APIC_DEST_SELF: | |
343f94fe | 648 | result = (target == source); |
97222cc8 ED |
649 | break; |
650 | case APIC_DEST_ALLINC: | |
651 | result = 1; | |
652 | break; | |
653 | case APIC_DEST_ALLBUT: | |
343f94fe | 654 | result = (target != source); |
97222cc8 ED |
655 | break; |
656 | default: | |
7712de87 JK |
657 | apic_debug("kvm: apic: Bad dest shorthand value %x\n", |
658 | short_hand); | |
97222cc8 ED |
659 | break; |
660 | } | |
661 | ||
662 | return result; | |
663 | } | |
664 | ||
1e08ec4a | 665 | bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src, |
b4f2225c | 666 | struct kvm_lapic_irq *irq, int *r, unsigned long *dest_map) |
1e08ec4a GN |
667 | { |
668 | struct kvm_apic_map *map; | |
669 | unsigned long bitmap = 1; | |
670 | struct kvm_lapic **dst; | |
671 | int i; | |
672 | bool ret = false; | |
673 | ||
674 | *r = -1; | |
675 | ||
676 | if (irq->shorthand == APIC_DEST_SELF) { | |
b4f2225c | 677 | *r = kvm_apic_set_irq(src->vcpu, irq, dest_map); |
1e08ec4a GN |
678 | return true; |
679 | } | |
680 | ||
681 | if (irq->shorthand) | |
682 | return false; | |
683 | ||
684 | rcu_read_lock(); | |
685 | map = rcu_dereference(kvm->arch.apic_map); | |
686 | ||
687 | if (!map) | |
688 | goto out; | |
689 | ||
394457a9 NA |
690 | if (irq->dest_id == map->broadcast) |
691 | goto out; | |
692 | ||
698f9755 RK |
693 | ret = true; |
694 | ||
1e08ec4a | 695 | if (irq->dest_mode == 0) { /* physical mode */ |
1e08ec4a GN |
696 | dst = &map->phys_map[irq->dest_id & 0xff]; |
697 | } else { | |
698 | u32 mda = irq->dest_id << (32 - map->ldr_bits); | |
699 | ||
700 | dst = map->logical_map[apic_cluster_id(map, mda)]; | |
701 | ||
702 | bitmap = apic_logical_id(map, mda); | |
703 | ||
704 | if (irq->delivery_mode == APIC_DM_LOWEST) { | |
705 | int l = -1; | |
706 | for_each_set_bit(i, &bitmap, 16) { | |
707 | if (!dst[i]) | |
708 | continue; | |
709 | if (l < 0) | |
710 | l = i; | |
711 | else if (kvm_apic_compare_prio(dst[i]->vcpu, dst[l]->vcpu) < 0) | |
712 | l = i; | |
713 | } | |
714 | ||
715 | bitmap = (l >= 0) ? 1 << l : 0; | |
716 | } | |
717 | } | |
718 | ||
719 | for_each_set_bit(i, &bitmap, 16) { | |
720 | if (!dst[i]) | |
721 | continue; | |
722 | if (*r < 0) | |
723 | *r = 0; | |
b4f2225c | 724 | *r += kvm_apic_set_irq(dst[i]->vcpu, irq, dest_map); |
1e08ec4a | 725 | } |
1e08ec4a GN |
726 | out: |
727 | rcu_read_unlock(); | |
728 | return ret; | |
729 | } | |
730 | ||
97222cc8 ED |
731 | /* |
732 | * Add a pending IRQ into lapic. | |
733 | * Return 1 if successfully added and 0 if discarded. | |
734 | */ | |
735 | static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, | |
b4f2225c YZ |
736 | int vector, int level, int trig_mode, |
737 | unsigned long *dest_map) | |
97222cc8 | 738 | { |
6da7e3f6 | 739 | int result = 0; |
c5ec1534 | 740 | struct kvm_vcpu *vcpu = apic->vcpu; |
97222cc8 | 741 | |
a183b638 PB |
742 | trace_kvm_apic_accept_irq(vcpu->vcpu_id, delivery_mode, |
743 | trig_mode, vector); | |
97222cc8 | 744 | switch (delivery_mode) { |
97222cc8 | 745 | case APIC_DM_LOWEST: |
e1035715 GN |
746 | vcpu->arch.apic_arb_prio++; |
747 | case APIC_DM_FIXED: | |
97222cc8 ED |
748 | /* FIXME add logic for vcpu on reset */ |
749 | if (unlikely(!apic_enabled(apic))) | |
750 | break; | |
751 | ||
11f5cc05 JK |
752 | result = 1; |
753 | ||
b4f2225c YZ |
754 | if (dest_map) |
755 | __set_bit(vcpu->vcpu_id, dest_map); | |
a5d36f82 | 756 | |
11f5cc05 | 757 | if (kvm_x86_ops->deliver_posted_interrupt) |
5a71785d | 758 | kvm_x86_ops->deliver_posted_interrupt(vcpu, vector); |
11f5cc05 JK |
759 | else { |
760 | apic_set_irr(vector, apic); | |
5a71785d YZ |
761 | |
762 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
763 | kvm_vcpu_kick(vcpu); | |
764 | } | |
97222cc8 ED |
765 | break; |
766 | ||
767 | case APIC_DM_REMRD: | |
24d2166b R |
768 | result = 1; |
769 | vcpu->arch.pv.pv_unhalted = 1; | |
770 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
771 | kvm_vcpu_kick(vcpu); | |
97222cc8 ED |
772 | break; |
773 | ||
774 | case APIC_DM_SMI: | |
7712de87 | 775 | apic_debug("Ignoring guest SMI\n"); |
97222cc8 | 776 | break; |
3419ffc8 | 777 | |
97222cc8 | 778 | case APIC_DM_NMI: |
6da7e3f6 | 779 | result = 1; |
3419ffc8 | 780 | kvm_inject_nmi(vcpu); |
26df99c6 | 781 | kvm_vcpu_kick(vcpu); |
97222cc8 ED |
782 | break; |
783 | ||
784 | case APIC_DM_INIT: | |
a52315e1 | 785 | if (!trig_mode || level) { |
6da7e3f6 | 786 | result = 1; |
66450a21 JK |
787 | /* assumes that there are only KVM_APIC_INIT/SIPI */ |
788 | apic->pending_events = (1UL << KVM_APIC_INIT); | |
789 | /* make sure pending_events is visible before sending | |
790 | * the request */ | |
791 | smp_wmb(); | |
3842d135 | 792 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
c5ec1534 HQ |
793 | kvm_vcpu_kick(vcpu); |
794 | } else { | |
1b10bf31 JK |
795 | apic_debug("Ignoring de-assert INIT to vcpu %d\n", |
796 | vcpu->vcpu_id); | |
c5ec1534 | 797 | } |
97222cc8 ED |
798 | break; |
799 | ||
800 | case APIC_DM_STARTUP: | |
1b10bf31 JK |
801 | apic_debug("SIPI to vcpu %d vector 0x%02x\n", |
802 | vcpu->vcpu_id, vector); | |
66450a21 JK |
803 | result = 1; |
804 | apic->sipi_vector = vector; | |
805 | /* make sure sipi_vector is visible for the receiver */ | |
806 | smp_wmb(); | |
807 | set_bit(KVM_APIC_SIPI, &apic->pending_events); | |
808 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
809 | kvm_vcpu_kick(vcpu); | |
97222cc8 ED |
810 | break; |
811 | ||
23930f95 JK |
812 | case APIC_DM_EXTINT: |
813 | /* | |
814 | * Should only be called by kvm_apic_local_deliver() with LVT0, | |
815 | * before NMI watchdog was enabled. Already handled by | |
816 | * kvm_apic_accept_pic_intr(). | |
817 | */ | |
818 | break; | |
819 | ||
97222cc8 ED |
820 | default: |
821 | printk(KERN_ERR "TODO: unsupported delivery mode %x\n", | |
822 | delivery_mode); | |
823 | break; | |
824 | } | |
825 | return result; | |
826 | } | |
827 | ||
e1035715 | 828 | int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2) |
8be5453f | 829 | { |
e1035715 | 830 | return vcpu1->arch.apic_arb_prio - vcpu2->arch.apic_arb_prio; |
8be5453f ZX |
831 | } |
832 | ||
c7c9c56c YZ |
833 | static void kvm_ioapic_send_eoi(struct kvm_lapic *apic, int vector) |
834 | { | |
835 | if (!(kvm_apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_DIRECTED_EOI) && | |
836 | kvm_ioapic_handles_vector(apic->vcpu->kvm, vector)) { | |
837 | int trigger_mode; | |
838 | if (apic_test_vector(vector, apic->regs + APIC_TMR)) | |
839 | trigger_mode = IOAPIC_LEVEL_TRIG; | |
840 | else | |
841 | trigger_mode = IOAPIC_EDGE_TRIG; | |
1fcc7890 | 842 | kvm_ioapic_update_eoi(apic->vcpu, vector, trigger_mode); |
c7c9c56c YZ |
843 | } |
844 | } | |
845 | ||
ae7a2a3f | 846 | static int apic_set_eoi(struct kvm_lapic *apic) |
97222cc8 ED |
847 | { |
848 | int vector = apic_find_highest_isr(apic); | |
ae7a2a3f MT |
849 | |
850 | trace_kvm_eoi(apic, vector); | |
851 | ||
97222cc8 ED |
852 | /* |
853 | * Not every write EOI will has corresponding ISR, | |
854 | * one example is when Kernel check timer on setup_IO_APIC | |
855 | */ | |
856 | if (vector == -1) | |
ae7a2a3f | 857 | return vector; |
97222cc8 | 858 | |
8680b94b | 859 | apic_clear_isr(vector, apic); |
97222cc8 ED |
860 | apic_update_ppr(apic); |
861 | ||
c7c9c56c | 862 | kvm_ioapic_send_eoi(apic, vector); |
3842d135 | 863 | kvm_make_request(KVM_REQ_EVENT, apic->vcpu); |
ae7a2a3f | 864 | return vector; |
97222cc8 ED |
865 | } |
866 | ||
c7c9c56c YZ |
867 | /* |
868 | * this interface assumes a trap-like exit, which has already finished | |
869 | * desired side effect including vISR and vPPR update. | |
870 | */ | |
871 | void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector) | |
872 | { | |
873 | struct kvm_lapic *apic = vcpu->arch.apic; | |
874 | ||
875 | trace_kvm_eoi(apic, vector); | |
876 | ||
877 | kvm_ioapic_send_eoi(apic, vector); | |
878 | kvm_make_request(KVM_REQ_EVENT, apic->vcpu); | |
879 | } | |
880 | EXPORT_SYMBOL_GPL(kvm_apic_set_eoi_accelerated); | |
881 | ||
97222cc8 ED |
882 | static void apic_send_ipi(struct kvm_lapic *apic) |
883 | { | |
c48f1496 GN |
884 | u32 icr_low = kvm_apic_get_reg(apic, APIC_ICR); |
885 | u32 icr_high = kvm_apic_get_reg(apic, APIC_ICR2); | |
58c2dde1 | 886 | struct kvm_lapic_irq irq; |
97222cc8 | 887 | |
58c2dde1 GN |
888 | irq.vector = icr_low & APIC_VECTOR_MASK; |
889 | irq.delivery_mode = icr_low & APIC_MODE_MASK; | |
890 | irq.dest_mode = icr_low & APIC_DEST_MASK; | |
891 | irq.level = icr_low & APIC_INT_ASSERT; | |
892 | irq.trig_mode = icr_low & APIC_INT_LEVELTRIG; | |
893 | irq.shorthand = icr_low & APIC_SHORT_MASK; | |
0105d1a5 GN |
894 | if (apic_x2apic_mode(apic)) |
895 | irq.dest_id = icr_high; | |
896 | else | |
897 | irq.dest_id = GET_APIC_DEST_FIELD(icr_high); | |
97222cc8 | 898 | |
1000ff8d GN |
899 | trace_kvm_apic_ipi(icr_low, irq.dest_id); |
900 | ||
97222cc8 ED |
901 | apic_debug("icr_high 0x%x, icr_low 0x%x, " |
902 | "short_hand 0x%x, dest 0x%x, trig_mode 0x%x, level 0x%x, " | |
903 | "dest_mode 0x%x, delivery_mode 0x%x, vector 0x%x\n", | |
9b5843dd | 904 | icr_high, icr_low, irq.shorthand, irq.dest_id, |
58c2dde1 GN |
905 | irq.trig_mode, irq.level, irq.dest_mode, irq.delivery_mode, |
906 | irq.vector); | |
907 | ||
b4f2225c | 908 | kvm_irq_delivery_to_apic(apic->vcpu->kvm, apic, &irq, NULL); |
97222cc8 ED |
909 | } |
910 | ||
911 | static u32 apic_get_tmcct(struct kvm_lapic *apic) | |
912 | { | |
b682b814 MT |
913 | ktime_t remaining; |
914 | s64 ns; | |
9da8f4e8 | 915 | u32 tmcct; |
97222cc8 ED |
916 | |
917 | ASSERT(apic != NULL); | |
918 | ||
9da8f4e8 | 919 | /* if initial count is 0, current count should also be 0 */ |
b963a22e AH |
920 | if (kvm_apic_get_reg(apic, APIC_TMICT) == 0 || |
921 | apic->lapic_timer.period == 0) | |
9da8f4e8 KP |
922 | return 0; |
923 | ||
ace15464 | 924 | remaining = hrtimer_get_remaining(&apic->lapic_timer.timer); |
b682b814 MT |
925 | if (ktime_to_ns(remaining) < 0) |
926 | remaining = ktime_set(0, 0); | |
927 | ||
d3c7b77d MT |
928 | ns = mod_64(ktime_to_ns(remaining), apic->lapic_timer.period); |
929 | tmcct = div64_u64(ns, | |
930 | (APIC_BUS_CYCLE_NS * apic->divide_count)); | |
97222cc8 ED |
931 | |
932 | return tmcct; | |
933 | } | |
934 | ||
b209749f AK |
935 | static void __report_tpr_access(struct kvm_lapic *apic, bool write) |
936 | { | |
937 | struct kvm_vcpu *vcpu = apic->vcpu; | |
938 | struct kvm_run *run = vcpu->run; | |
939 | ||
a8eeb04a | 940 | kvm_make_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu); |
5fdbf976 | 941 | run->tpr_access.rip = kvm_rip_read(vcpu); |
b209749f AK |
942 | run->tpr_access.is_write = write; |
943 | } | |
944 | ||
945 | static inline void report_tpr_access(struct kvm_lapic *apic, bool write) | |
946 | { | |
947 | if (apic->vcpu->arch.tpr_access_reporting) | |
948 | __report_tpr_access(apic, write); | |
949 | } | |
950 | ||
97222cc8 ED |
951 | static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset) |
952 | { | |
953 | u32 val = 0; | |
954 | ||
955 | if (offset >= LAPIC_MMIO_LENGTH) | |
956 | return 0; | |
957 | ||
958 | switch (offset) { | |
0105d1a5 GN |
959 | case APIC_ID: |
960 | if (apic_x2apic_mode(apic)) | |
961 | val = kvm_apic_id(apic); | |
962 | else | |
963 | val = kvm_apic_id(apic) << 24; | |
964 | break; | |
97222cc8 | 965 | case APIC_ARBPRI: |
7712de87 | 966 | apic_debug("Access APIC ARBPRI register which is for P6\n"); |
97222cc8 ED |
967 | break; |
968 | ||
969 | case APIC_TMCCT: /* Timer CCR */ | |
a3e06bbe LJ |
970 | if (apic_lvtt_tscdeadline(apic)) |
971 | return 0; | |
972 | ||
97222cc8 ED |
973 | val = apic_get_tmcct(apic); |
974 | break; | |
4a4541a4 AK |
975 | case APIC_PROCPRI: |
976 | apic_update_ppr(apic); | |
c48f1496 | 977 | val = kvm_apic_get_reg(apic, offset); |
4a4541a4 | 978 | break; |
b209749f AK |
979 | case APIC_TASKPRI: |
980 | report_tpr_access(apic, false); | |
981 | /* fall thru */ | |
97222cc8 | 982 | default: |
c48f1496 | 983 | val = kvm_apic_get_reg(apic, offset); |
97222cc8 ED |
984 | break; |
985 | } | |
986 | ||
987 | return val; | |
988 | } | |
989 | ||
d76685c4 GH |
990 | static inline struct kvm_lapic *to_lapic(struct kvm_io_device *dev) |
991 | { | |
992 | return container_of(dev, struct kvm_lapic, dev); | |
993 | } | |
994 | ||
0105d1a5 GN |
995 | static int apic_reg_read(struct kvm_lapic *apic, u32 offset, int len, |
996 | void *data) | |
97222cc8 | 997 | { |
97222cc8 ED |
998 | unsigned char alignment = offset & 0xf; |
999 | u32 result; | |
d5b0b5b1 | 1000 | /* this bitmask has a bit cleared for each reserved register */ |
0105d1a5 | 1001 | static const u64 rmask = 0x43ff01ffffffe70cULL; |
97222cc8 ED |
1002 | |
1003 | if ((alignment + len) > 4) { | |
4088bb3c GN |
1004 | apic_debug("KVM_APIC_READ: alignment error %x %d\n", |
1005 | offset, len); | |
0105d1a5 | 1006 | return 1; |
97222cc8 | 1007 | } |
0105d1a5 GN |
1008 | |
1009 | if (offset > 0x3f0 || !(rmask & (1ULL << (offset >> 4)))) { | |
4088bb3c GN |
1010 | apic_debug("KVM_APIC_READ: read reserved register %x\n", |
1011 | offset); | |
0105d1a5 GN |
1012 | return 1; |
1013 | } | |
1014 | ||
97222cc8 ED |
1015 | result = __apic_read(apic, offset & ~0xf); |
1016 | ||
229456fc MT |
1017 | trace_kvm_apic_read(offset, result); |
1018 | ||
97222cc8 ED |
1019 | switch (len) { |
1020 | case 1: | |
1021 | case 2: | |
1022 | case 4: | |
1023 | memcpy(data, (char *)&result + alignment, len); | |
1024 | break; | |
1025 | default: | |
1026 | printk(KERN_ERR "Local APIC read with len = %x, " | |
1027 | "should be 1,2, or 4 instead\n", len); | |
1028 | break; | |
1029 | } | |
bda9020e | 1030 | return 0; |
97222cc8 ED |
1031 | } |
1032 | ||
0105d1a5 GN |
1033 | static int apic_mmio_in_range(struct kvm_lapic *apic, gpa_t addr) |
1034 | { | |
c48f1496 | 1035 | return kvm_apic_hw_enabled(apic) && |
0105d1a5 GN |
1036 | addr >= apic->base_address && |
1037 | addr < apic->base_address + LAPIC_MMIO_LENGTH; | |
1038 | } | |
1039 | ||
1040 | static int apic_mmio_read(struct kvm_io_device *this, | |
1041 | gpa_t address, int len, void *data) | |
1042 | { | |
1043 | struct kvm_lapic *apic = to_lapic(this); | |
1044 | u32 offset = address - apic->base_address; | |
1045 | ||
1046 | if (!apic_mmio_in_range(apic, address)) | |
1047 | return -EOPNOTSUPP; | |
1048 | ||
1049 | apic_reg_read(apic, offset, len, data); | |
1050 | ||
1051 | return 0; | |
1052 | } | |
1053 | ||
97222cc8 ED |
1054 | static void update_divide_count(struct kvm_lapic *apic) |
1055 | { | |
1056 | u32 tmp1, tmp2, tdcr; | |
1057 | ||
c48f1496 | 1058 | tdcr = kvm_apic_get_reg(apic, APIC_TDCR); |
97222cc8 ED |
1059 | tmp1 = tdcr & 0xf; |
1060 | tmp2 = ((tmp1 & 0x3) | ((tmp1 & 0x8) >> 1)) + 1; | |
d3c7b77d | 1061 | apic->divide_count = 0x1 << (tmp2 & 0x7); |
97222cc8 ED |
1062 | |
1063 | apic_debug("timer divide count is 0x%x\n", | |
9b5843dd | 1064 | apic->divide_count); |
97222cc8 ED |
1065 | } |
1066 | ||
5d87db71 RK |
1067 | static void apic_timer_expired(struct kvm_lapic *apic) |
1068 | { | |
1069 | struct kvm_vcpu *vcpu = apic->vcpu; | |
1070 | wait_queue_head_t *q = &vcpu->wq; | |
1071 | ||
1072 | /* | |
1073 | * Note: KVM_REQ_PENDING_TIMER is implicitly checked in | |
1074 | * vcpu_enter_guest. | |
1075 | */ | |
1076 | if (atomic_read(&apic->lapic_timer.pending)) | |
1077 | return; | |
1078 | ||
1079 | atomic_inc(&apic->lapic_timer.pending); | |
1080 | /* FIXME: this code should not know anything about vcpus */ | |
1081 | kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); | |
1082 | ||
1083 | if (waitqueue_active(q)) | |
1084 | wake_up_interruptible(q); | |
1085 | } | |
1086 | ||
97222cc8 ED |
1087 | static void start_apic_timer(struct kvm_lapic *apic) |
1088 | { | |
a3e06bbe | 1089 | ktime_t now; |
d3c7b77d | 1090 | atomic_set(&apic->lapic_timer.pending, 0); |
0b975a3c | 1091 | |
a3e06bbe | 1092 | if (apic_lvtt_period(apic) || apic_lvtt_oneshot(apic)) { |
d5b0b5b1 | 1093 | /* lapic timer in oneshot or periodic mode */ |
a3e06bbe | 1094 | now = apic->lapic_timer.timer.base->get_time(); |
c48f1496 | 1095 | apic->lapic_timer.period = (u64)kvm_apic_get_reg(apic, APIC_TMICT) |
a3e06bbe LJ |
1096 | * APIC_BUS_CYCLE_NS * apic->divide_count; |
1097 | ||
1098 | if (!apic->lapic_timer.period) | |
1099 | return; | |
1100 | /* | |
1101 | * Do not allow the guest to program periodic timers with small | |
1102 | * interval, since the hrtimers are not throttled by the host | |
1103 | * scheduler. | |
1104 | */ | |
1105 | if (apic_lvtt_period(apic)) { | |
1106 | s64 min_period = min_timer_period_us * 1000LL; | |
1107 | ||
1108 | if (apic->lapic_timer.period < min_period) { | |
1109 | pr_info_ratelimited( | |
1110 | "kvm: vcpu %i: requested %lld ns " | |
1111 | "lapic timer period limited to %lld ns\n", | |
1112 | apic->vcpu->vcpu_id, | |
1113 | apic->lapic_timer.period, min_period); | |
1114 | apic->lapic_timer.period = min_period; | |
1115 | } | |
9bc5791d | 1116 | } |
0b975a3c | 1117 | |
a3e06bbe LJ |
1118 | hrtimer_start(&apic->lapic_timer.timer, |
1119 | ktime_add_ns(now, apic->lapic_timer.period), | |
1120 | HRTIMER_MODE_ABS); | |
97222cc8 | 1121 | |
a3e06bbe | 1122 | apic_debug("%s: bus cycle is %" PRId64 "ns, now 0x%016" |
97222cc8 ED |
1123 | PRIx64 ", " |
1124 | "timer initial count 0x%x, period %lldns, " | |
b8688d51 | 1125 | "expire @ 0x%016" PRIx64 ".\n", __func__, |
97222cc8 | 1126 | APIC_BUS_CYCLE_NS, ktime_to_ns(now), |
c48f1496 | 1127 | kvm_apic_get_reg(apic, APIC_TMICT), |
d3c7b77d | 1128 | apic->lapic_timer.period, |
97222cc8 | 1129 | ktime_to_ns(ktime_add_ns(now, |
d3c7b77d | 1130 | apic->lapic_timer.period))); |
a3e06bbe LJ |
1131 | } else if (apic_lvtt_tscdeadline(apic)) { |
1132 | /* lapic timer in tsc deadline mode */ | |
1133 | u64 guest_tsc, tscdeadline = apic->lapic_timer.tscdeadline; | |
1134 | u64 ns = 0; | |
1135 | struct kvm_vcpu *vcpu = apic->vcpu; | |
cc578287 | 1136 | unsigned long this_tsc_khz = vcpu->arch.virtual_tsc_khz; |
a3e06bbe LJ |
1137 | unsigned long flags; |
1138 | ||
1139 | if (unlikely(!tscdeadline || !this_tsc_khz)) | |
1140 | return; | |
1141 | ||
1142 | local_irq_save(flags); | |
1143 | ||
1144 | now = apic->lapic_timer.timer.base->get_time(); | |
886b470c | 1145 | guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu, native_read_tsc()); |
a3e06bbe LJ |
1146 | if (likely(tscdeadline > guest_tsc)) { |
1147 | ns = (tscdeadline - guest_tsc) * 1000000ULL; | |
1148 | do_div(ns, this_tsc_khz); | |
1e0ad70c RK |
1149 | hrtimer_start(&apic->lapic_timer.timer, |
1150 | ktime_add_ns(now, ns), HRTIMER_MODE_ABS); | |
1151 | } else | |
1152 | apic_timer_expired(apic); | |
a3e06bbe LJ |
1153 | |
1154 | local_irq_restore(flags); | |
1155 | } | |
97222cc8 ED |
1156 | } |
1157 | ||
cc6e462c JK |
1158 | static void apic_manage_nmi_watchdog(struct kvm_lapic *apic, u32 lvt0_val) |
1159 | { | |
c48f1496 | 1160 | int nmi_wd_enabled = apic_lvt_nmi_mode(kvm_apic_get_reg(apic, APIC_LVT0)); |
cc6e462c JK |
1161 | |
1162 | if (apic_lvt_nmi_mode(lvt0_val)) { | |
1163 | if (!nmi_wd_enabled) { | |
1164 | apic_debug("Receive NMI setting on APIC_LVT0 " | |
1165 | "for cpu %d\n", apic->vcpu->vcpu_id); | |
1166 | apic->vcpu->kvm->arch.vapics_in_nmi_mode++; | |
1167 | } | |
1168 | } else if (nmi_wd_enabled) | |
1169 | apic->vcpu->kvm->arch.vapics_in_nmi_mode--; | |
1170 | } | |
1171 | ||
0105d1a5 | 1172 | static int apic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val) |
97222cc8 | 1173 | { |
0105d1a5 | 1174 | int ret = 0; |
97222cc8 | 1175 | |
0105d1a5 | 1176 | trace_kvm_apic_write(reg, val); |
97222cc8 | 1177 | |
0105d1a5 | 1178 | switch (reg) { |
97222cc8 | 1179 | case APIC_ID: /* Local APIC ID */ |
0105d1a5 | 1180 | if (!apic_x2apic_mode(apic)) |
1e08ec4a | 1181 | kvm_apic_set_id(apic, val >> 24); |
0105d1a5 GN |
1182 | else |
1183 | ret = 1; | |
97222cc8 ED |
1184 | break; |
1185 | ||
1186 | case APIC_TASKPRI: | |
b209749f | 1187 | report_tpr_access(apic, true); |
97222cc8 ED |
1188 | apic_set_tpr(apic, val & 0xff); |
1189 | break; | |
1190 | ||
1191 | case APIC_EOI: | |
1192 | apic_set_eoi(apic); | |
1193 | break; | |
1194 | ||
1195 | case APIC_LDR: | |
0105d1a5 | 1196 | if (!apic_x2apic_mode(apic)) |
1e08ec4a | 1197 | kvm_apic_set_ldr(apic, val & APIC_LDR_MASK); |
0105d1a5 GN |
1198 | else |
1199 | ret = 1; | |
97222cc8 ED |
1200 | break; |
1201 | ||
1202 | case APIC_DFR: | |
1e08ec4a | 1203 | if (!apic_x2apic_mode(apic)) { |
0105d1a5 | 1204 | apic_set_reg(apic, APIC_DFR, val | 0x0FFFFFFF); |
1e08ec4a GN |
1205 | recalculate_apic_map(apic->vcpu->kvm); |
1206 | } else | |
0105d1a5 | 1207 | ret = 1; |
97222cc8 ED |
1208 | break; |
1209 | ||
fc61b800 GN |
1210 | case APIC_SPIV: { |
1211 | u32 mask = 0x3ff; | |
c48f1496 | 1212 | if (kvm_apic_get_reg(apic, APIC_LVR) & APIC_LVR_DIRECTED_EOI) |
fc61b800 | 1213 | mask |= APIC_SPIV_DIRECTED_EOI; |
f8c1ea10 | 1214 | apic_set_spiv(apic, val & mask); |
97222cc8 ED |
1215 | if (!(val & APIC_SPIV_APIC_ENABLED)) { |
1216 | int i; | |
1217 | u32 lvt_val; | |
1218 | ||
1219 | for (i = 0; i < APIC_LVT_NUM; i++) { | |
c48f1496 | 1220 | lvt_val = kvm_apic_get_reg(apic, |
97222cc8 ED |
1221 | APIC_LVTT + 0x10 * i); |
1222 | apic_set_reg(apic, APIC_LVTT + 0x10 * i, | |
1223 | lvt_val | APIC_LVT_MASKED); | |
1224 | } | |
d3c7b77d | 1225 | atomic_set(&apic->lapic_timer.pending, 0); |
97222cc8 ED |
1226 | |
1227 | } | |
1228 | break; | |
fc61b800 | 1229 | } |
97222cc8 ED |
1230 | case APIC_ICR: |
1231 | /* No delay here, so we always clear the pending bit */ | |
1232 | apic_set_reg(apic, APIC_ICR, val & ~(1 << 12)); | |
1233 | apic_send_ipi(apic); | |
1234 | break; | |
1235 | ||
1236 | case APIC_ICR2: | |
0105d1a5 GN |
1237 | if (!apic_x2apic_mode(apic)) |
1238 | val &= 0xff000000; | |
1239 | apic_set_reg(apic, APIC_ICR2, val); | |
97222cc8 ED |
1240 | break; |
1241 | ||
23930f95 | 1242 | case APIC_LVT0: |
cc6e462c | 1243 | apic_manage_nmi_watchdog(apic, val); |
97222cc8 ED |
1244 | case APIC_LVTTHMR: |
1245 | case APIC_LVTPC: | |
97222cc8 ED |
1246 | case APIC_LVT1: |
1247 | case APIC_LVTERR: | |
1248 | /* TODO: Check vector */ | |
c48f1496 | 1249 | if (!kvm_apic_sw_enabled(apic)) |
97222cc8 ED |
1250 | val |= APIC_LVT_MASKED; |
1251 | ||
0105d1a5 GN |
1252 | val &= apic_lvt_mask[(reg - APIC_LVTT) >> 4]; |
1253 | apic_set_reg(apic, reg, val); | |
97222cc8 ED |
1254 | |
1255 | break; | |
1256 | ||
a323b409 RK |
1257 | case APIC_LVTT: { |
1258 | u32 timer_mode = val & apic->lapic_timer.timer_mode_mask; | |
1259 | ||
1260 | if (apic->lapic_timer.timer_mode != timer_mode) { | |
1261 | apic->lapic_timer.timer_mode = timer_mode; | |
a3e06bbe | 1262 | hrtimer_cancel(&apic->lapic_timer.timer); |
a323b409 | 1263 | } |
a3e06bbe | 1264 | |
c48f1496 | 1265 | if (!kvm_apic_sw_enabled(apic)) |
a3e06bbe LJ |
1266 | val |= APIC_LVT_MASKED; |
1267 | val &= (apic_lvt_mask[0] | apic->lapic_timer.timer_mode_mask); | |
1268 | apic_set_reg(apic, APIC_LVTT, val); | |
1269 | break; | |
a323b409 | 1270 | } |
a3e06bbe | 1271 | |
97222cc8 | 1272 | case APIC_TMICT: |
a3e06bbe LJ |
1273 | if (apic_lvtt_tscdeadline(apic)) |
1274 | break; | |
1275 | ||
d3c7b77d | 1276 | hrtimer_cancel(&apic->lapic_timer.timer); |
97222cc8 ED |
1277 | apic_set_reg(apic, APIC_TMICT, val); |
1278 | start_apic_timer(apic); | |
0105d1a5 | 1279 | break; |
97222cc8 ED |
1280 | |
1281 | case APIC_TDCR: | |
1282 | if (val & 4) | |
7712de87 | 1283 | apic_debug("KVM_WRITE:TDCR %x\n", val); |
97222cc8 ED |
1284 | apic_set_reg(apic, APIC_TDCR, val); |
1285 | update_divide_count(apic); | |
1286 | break; | |
1287 | ||
0105d1a5 GN |
1288 | case APIC_ESR: |
1289 | if (apic_x2apic_mode(apic) && val != 0) { | |
7712de87 | 1290 | apic_debug("KVM_WRITE:ESR not zero %x\n", val); |
0105d1a5 GN |
1291 | ret = 1; |
1292 | } | |
1293 | break; | |
1294 | ||
1295 | case APIC_SELF_IPI: | |
1296 | if (apic_x2apic_mode(apic)) { | |
1297 | apic_reg_write(apic, APIC_ICR, 0x40000 | (val & 0xff)); | |
1298 | } else | |
1299 | ret = 1; | |
1300 | break; | |
97222cc8 | 1301 | default: |
0105d1a5 | 1302 | ret = 1; |
97222cc8 ED |
1303 | break; |
1304 | } | |
0105d1a5 GN |
1305 | if (ret) |
1306 | apic_debug("Local APIC Write to read-only register %x\n", reg); | |
1307 | return ret; | |
1308 | } | |
1309 | ||
1310 | static int apic_mmio_write(struct kvm_io_device *this, | |
1311 | gpa_t address, int len, const void *data) | |
1312 | { | |
1313 | struct kvm_lapic *apic = to_lapic(this); | |
1314 | unsigned int offset = address - apic->base_address; | |
1315 | u32 val; | |
1316 | ||
1317 | if (!apic_mmio_in_range(apic, address)) | |
1318 | return -EOPNOTSUPP; | |
1319 | ||
1320 | /* | |
1321 | * APIC register must be aligned on 128-bits boundary. | |
1322 | * 32/64/128 bits registers must be accessed thru 32 bits. | |
1323 | * Refer SDM 8.4.1 | |
1324 | */ | |
1325 | if (len != 4 || (offset & 0xf)) { | |
1326 | /* Don't shout loud, $infamous_os would cause only noise. */ | |
1327 | apic_debug("apic write: bad size=%d %lx\n", len, (long)address); | |
756975bb | 1328 | return 0; |
0105d1a5 GN |
1329 | } |
1330 | ||
1331 | val = *(u32*)data; | |
1332 | ||
1333 | /* too common printing */ | |
1334 | if (offset != APIC_EOI) | |
1335 | apic_debug("%s: offset 0x%x with length 0x%x, and value is " | |
1336 | "0x%x\n", __func__, offset, len, val); | |
1337 | ||
1338 | apic_reg_write(apic, offset & 0xff0, val); | |
1339 | ||
bda9020e | 1340 | return 0; |
97222cc8 ED |
1341 | } |
1342 | ||
58fbbf26 KT |
1343 | void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu) |
1344 | { | |
c48f1496 | 1345 | if (kvm_vcpu_has_lapic(vcpu)) |
58fbbf26 KT |
1346 | apic_reg_write(vcpu->arch.apic, APIC_EOI, 0); |
1347 | } | |
1348 | EXPORT_SYMBOL_GPL(kvm_lapic_set_eoi); | |
1349 | ||
83d4c286 YZ |
1350 | /* emulate APIC access in a trap manner */ |
1351 | void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset) | |
1352 | { | |
1353 | u32 val = 0; | |
1354 | ||
1355 | /* hw has done the conditional check and inst decode */ | |
1356 | offset &= 0xff0; | |
1357 | ||
1358 | apic_reg_read(vcpu->arch.apic, offset, 4, &val); | |
1359 | ||
1360 | /* TODO: optimize to just emulate side effect w/o one more write */ | |
1361 | apic_reg_write(vcpu->arch.apic, offset, val); | |
1362 | } | |
1363 | EXPORT_SYMBOL_GPL(kvm_apic_write_nodecode); | |
1364 | ||
d589444e | 1365 | void kvm_free_lapic(struct kvm_vcpu *vcpu) |
97222cc8 | 1366 | { |
f8c1ea10 GN |
1367 | struct kvm_lapic *apic = vcpu->arch.apic; |
1368 | ||
ad312c7c | 1369 | if (!vcpu->arch.apic) |
97222cc8 ED |
1370 | return; |
1371 | ||
f8c1ea10 | 1372 | hrtimer_cancel(&apic->lapic_timer.timer); |
97222cc8 | 1373 | |
c5cc421b GN |
1374 | if (!(vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE)) |
1375 | static_key_slow_dec_deferred(&apic_hw_disabled); | |
1376 | ||
e462755c | 1377 | if (!apic->sw_enabled) |
f8c1ea10 | 1378 | static_key_slow_dec_deferred(&apic_sw_disabled); |
97222cc8 | 1379 | |
f8c1ea10 GN |
1380 | if (apic->regs) |
1381 | free_page((unsigned long)apic->regs); | |
1382 | ||
1383 | kfree(apic); | |
97222cc8 ED |
1384 | } |
1385 | ||
1386 | /* | |
1387 | *---------------------------------------------------------------------- | |
1388 | * LAPIC interface | |
1389 | *---------------------------------------------------------------------- | |
1390 | */ | |
1391 | ||
a3e06bbe LJ |
1392 | u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu) |
1393 | { | |
1394 | struct kvm_lapic *apic = vcpu->arch.apic; | |
a3e06bbe | 1395 | |
c48f1496 | 1396 | if (!kvm_vcpu_has_lapic(vcpu) || apic_lvtt_oneshot(apic) || |
54e9818f | 1397 | apic_lvtt_period(apic)) |
a3e06bbe LJ |
1398 | return 0; |
1399 | ||
1400 | return apic->lapic_timer.tscdeadline; | |
1401 | } | |
1402 | ||
1403 | void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data) | |
1404 | { | |
1405 | struct kvm_lapic *apic = vcpu->arch.apic; | |
a3e06bbe | 1406 | |
c48f1496 | 1407 | if (!kvm_vcpu_has_lapic(vcpu) || apic_lvtt_oneshot(apic) || |
54e9818f | 1408 | apic_lvtt_period(apic)) |
a3e06bbe LJ |
1409 | return; |
1410 | ||
1411 | hrtimer_cancel(&apic->lapic_timer.timer); | |
1412 | apic->lapic_timer.tscdeadline = data; | |
1413 | start_apic_timer(apic); | |
1414 | } | |
1415 | ||
97222cc8 ED |
1416 | void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8) |
1417 | { | |
ad312c7c | 1418 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 | 1419 | |
c48f1496 | 1420 | if (!kvm_vcpu_has_lapic(vcpu)) |
97222cc8 | 1421 | return; |
54e9818f | 1422 | |
b93463aa | 1423 | apic_set_tpr(apic, ((cr8 & 0x0f) << 4) |
c48f1496 | 1424 | | (kvm_apic_get_reg(apic, APIC_TASKPRI) & 4)); |
97222cc8 ED |
1425 | } |
1426 | ||
1427 | u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu) | |
1428 | { | |
97222cc8 ED |
1429 | u64 tpr; |
1430 | ||
c48f1496 | 1431 | if (!kvm_vcpu_has_lapic(vcpu)) |
97222cc8 | 1432 | return 0; |
54e9818f | 1433 | |
c48f1496 | 1434 | tpr = (u64) kvm_apic_get_reg(vcpu->arch.apic, APIC_TASKPRI); |
97222cc8 ED |
1435 | |
1436 | return (tpr & 0xf0) >> 4; | |
1437 | } | |
1438 | ||
1439 | void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value) | |
1440 | { | |
8d14695f | 1441 | u64 old_value = vcpu->arch.apic_base; |
ad312c7c | 1442 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
1443 | |
1444 | if (!apic) { | |
1445 | value |= MSR_IA32_APICBASE_BSP; | |
ad312c7c | 1446 | vcpu->arch.apic_base = value; |
97222cc8 ED |
1447 | return; |
1448 | } | |
c5af89b6 | 1449 | |
e66d2ae7 JK |
1450 | if (!kvm_vcpu_is_bsp(apic->vcpu)) |
1451 | value &= ~MSR_IA32_APICBASE_BSP; | |
1452 | vcpu->arch.apic_base = value; | |
1453 | ||
c5cc421b | 1454 | /* update jump label if enable bit changes */ |
0dce7cd6 | 1455 | if ((old_value ^ value) & MSR_IA32_APICBASE_ENABLE) { |
c5cc421b GN |
1456 | if (value & MSR_IA32_APICBASE_ENABLE) |
1457 | static_key_slow_dec_deferred(&apic_hw_disabled); | |
1458 | else | |
1459 | static_key_slow_inc(&apic_hw_disabled.key); | |
1e08ec4a | 1460 | recalculate_apic_map(vcpu->kvm); |
c5cc421b GN |
1461 | } |
1462 | ||
8d14695f YZ |
1463 | if ((old_value ^ value) & X2APIC_ENABLE) { |
1464 | if (value & X2APIC_ENABLE) { | |
1465 | u32 id = kvm_apic_id(apic); | |
1466 | u32 ldr = ((id >> 4) << 16) | (1 << (id & 0xf)); | |
1467 | kvm_apic_set_ldr(apic, ldr); | |
1468 | kvm_x86_ops->set_virtual_x2apic_mode(vcpu, true); | |
1469 | } else | |
1470 | kvm_x86_ops->set_virtual_x2apic_mode(vcpu, false); | |
0105d1a5 | 1471 | } |
8d14695f | 1472 | |
ad312c7c | 1473 | apic->base_address = apic->vcpu->arch.apic_base & |
97222cc8 ED |
1474 | MSR_IA32_APICBASE_BASE; |
1475 | ||
db324fe6 NA |
1476 | if ((value & MSR_IA32_APICBASE_ENABLE) && |
1477 | apic->base_address != APIC_DEFAULT_PHYS_BASE) | |
1478 | pr_warn_once("APIC base relocation is unsupported by KVM"); | |
1479 | ||
97222cc8 ED |
1480 | /* with FSB delivery interrupt, we can restart APIC functionality */ |
1481 | apic_debug("apic base msr is 0x%016" PRIx64 ", and base address is " | |
ad312c7c | 1482 | "0x%lx.\n", apic->vcpu->arch.apic_base, apic->base_address); |
97222cc8 ED |
1483 | |
1484 | } | |
1485 | ||
c5ec1534 | 1486 | void kvm_lapic_reset(struct kvm_vcpu *vcpu) |
97222cc8 ED |
1487 | { |
1488 | struct kvm_lapic *apic; | |
1489 | int i; | |
1490 | ||
b8688d51 | 1491 | apic_debug("%s\n", __func__); |
97222cc8 ED |
1492 | |
1493 | ASSERT(vcpu); | |
ad312c7c | 1494 | apic = vcpu->arch.apic; |
97222cc8 ED |
1495 | ASSERT(apic != NULL); |
1496 | ||
1497 | /* Stop the timer in case it's a reset to an active apic */ | |
d3c7b77d | 1498 | hrtimer_cancel(&apic->lapic_timer.timer); |
97222cc8 | 1499 | |
1e08ec4a | 1500 | kvm_apic_set_id(apic, vcpu->vcpu_id); |
fc61b800 | 1501 | kvm_apic_set_version(apic->vcpu); |
97222cc8 ED |
1502 | |
1503 | for (i = 0; i < APIC_LVT_NUM; i++) | |
1504 | apic_set_reg(apic, APIC_LVTT + 0x10 * i, APIC_LVT_MASKED); | |
a323b409 | 1505 | apic->lapic_timer.timer_mode = 0; |
40487c68 QH |
1506 | apic_set_reg(apic, APIC_LVT0, |
1507 | SET_APIC_DELIVERY_MODE(0, APIC_MODE_EXTINT)); | |
97222cc8 ED |
1508 | |
1509 | apic_set_reg(apic, APIC_DFR, 0xffffffffU); | |
f8c1ea10 | 1510 | apic_set_spiv(apic, 0xff); |
97222cc8 | 1511 | apic_set_reg(apic, APIC_TASKPRI, 0); |
1e08ec4a | 1512 | kvm_apic_set_ldr(apic, 0); |
97222cc8 ED |
1513 | apic_set_reg(apic, APIC_ESR, 0); |
1514 | apic_set_reg(apic, APIC_ICR, 0); | |
1515 | apic_set_reg(apic, APIC_ICR2, 0); | |
1516 | apic_set_reg(apic, APIC_TDCR, 0); | |
1517 | apic_set_reg(apic, APIC_TMICT, 0); | |
1518 | for (i = 0; i < 8; i++) { | |
1519 | apic_set_reg(apic, APIC_IRR + 0x10 * i, 0); | |
1520 | apic_set_reg(apic, APIC_ISR + 0x10 * i, 0); | |
1521 | apic_set_reg(apic, APIC_TMR + 0x10 * i, 0); | |
1522 | } | |
c7c9c56c YZ |
1523 | apic->irr_pending = kvm_apic_vid_enabled(vcpu->kvm); |
1524 | apic->isr_count = kvm_apic_vid_enabled(vcpu->kvm); | |
8680b94b | 1525 | apic->highest_isr_cache = -1; |
b33ac88b | 1526 | update_divide_count(apic); |
d3c7b77d | 1527 | atomic_set(&apic->lapic_timer.pending, 0); |
c5af89b6 | 1528 | if (kvm_vcpu_is_bsp(vcpu)) |
5dbc8f3f GN |
1529 | kvm_lapic_set_base(vcpu, |
1530 | vcpu->arch.apic_base | MSR_IA32_APICBASE_BSP); | |
ae7a2a3f | 1531 | vcpu->arch.pv_eoi.msr_val = 0; |
97222cc8 ED |
1532 | apic_update_ppr(apic); |
1533 | ||
e1035715 | 1534 | vcpu->arch.apic_arb_prio = 0; |
41383771 | 1535 | vcpu->arch.apic_attention = 0; |
e1035715 | 1536 | |
98eff52a | 1537 | apic_debug("%s: vcpu=%p, id=%d, base_msr=" |
b8688d51 | 1538 | "0x%016" PRIx64 ", base_address=0x%0lx.\n", __func__, |
97222cc8 | 1539 | vcpu, kvm_apic_id(apic), |
ad312c7c | 1540 | vcpu->arch.apic_base, apic->base_address); |
97222cc8 ED |
1541 | } |
1542 | ||
97222cc8 ED |
1543 | /* |
1544 | *---------------------------------------------------------------------- | |
1545 | * timer interface | |
1546 | *---------------------------------------------------------------------- | |
1547 | */ | |
1b9778da | 1548 | |
2a6eac96 | 1549 | static bool lapic_is_periodic(struct kvm_lapic *apic) |
97222cc8 | 1550 | { |
d3c7b77d | 1551 | return apic_lvtt_period(apic); |
97222cc8 ED |
1552 | } |
1553 | ||
3d80840d MT |
1554 | int apic_has_pending_timer(struct kvm_vcpu *vcpu) |
1555 | { | |
54e9818f | 1556 | struct kvm_lapic *apic = vcpu->arch.apic; |
3d80840d | 1557 | |
c48f1496 | 1558 | if (kvm_vcpu_has_lapic(vcpu) && apic_enabled(apic) && |
54e9818f GN |
1559 | apic_lvt_enabled(apic, APIC_LVTT)) |
1560 | return atomic_read(&apic->lapic_timer.pending); | |
3d80840d MT |
1561 | |
1562 | return 0; | |
1563 | } | |
1564 | ||
89342082 | 1565 | int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type) |
1b9778da | 1566 | { |
c48f1496 | 1567 | u32 reg = kvm_apic_get_reg(apic, lvt_type); |
23930f95 | 1568 | int vector, mode, trig_mode; |
23930f95 | 1569 | |
c48f1496 | 1570 | if (kvm_apic_hw_enabled(apic) && !(reg & APIC_LVT_MASKED)) { |
23930f95 JK |
1571 | vector = reg & APIC_VECTOR_MASK; |
1572 | mode = reg & APIC_MODE_MASK; | |
1573 | trig_mode = reg & APIC_LVT_LEVEL_TRIGGER; | |
b4f2225c YZ |
1574 | return __apic_accept_irq(apic, mode, vector, 1, trig_mode, |
1575 | NULL); | |
23930f95 JK |
1576 | } |
1577 | return 0; | |
1578 | } | |
1b9778da | 1579 | |
8fdb2351 | 1580 | void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu) |
23930f95 | 1581 | { |
8fdb2351 JK |
1582 | struct kvm_lapic *apic = vcpu->arch.apic; |
1583 | ||
1584 | if (apic) | |
1585 | kvm_apic_local_deliver(apic, APIC_LVT0); | |
1b9778da ED |
1586 | } |
1587 | ||
d76685c4 GH |
1588 | static const struct kvm_io_device_ops apic_mmio_ops = { |
1589 | .read = apic_mmio_read, | |
1590 | .write = apic_mmio_write, | |
d76685c4 GH |
1591 | }; |
1592 | ||
e9d90d47 AK |
1593 | static enum hrtimer_restart apic_timer_fn(struct hrtimer *data) |
1594 | { | |
1595 | struct kvm_timer *ktimer = container_of(data, struct kvm_timer, timer); | |
2a6eac96 | 1596 | struct kvm_lapic *apic = container_of(ktimer, struct kvm_lapic, lapic_timer); |
e9d90d47 | 1597 | |
5d87db71 | 1598 | apic_timer_expired(apic); |
e9d90d47 | 1599 | |
2a6eac96 | 1600 | if (lapic_is_periodic(apic)) { |
e9d90d47 AK |
1601 | hrtimer_add_expires_ns(&ktimer->timer, ktimer->period); |
1602 | return HRTIMER_RESTART; | |
1603 | } else | |
1604 | return HRTIMER_NORESTART; | |
1605 | } | |
1606 | ||
97222cc8 ED |
1607 | int kvm_create_lapic(struct kvm_vcpu *vcpu) |
1608 | { | |
1609 | struct kvm_lapic *apic; | |
1610 | ||
1611 | ASSERT(vcpu != NULL); | |
1612 | apic_debug("apic_init %d\n", vcpu->vcpu_id); | |
1613 | ||
1614 | apic = kzalloc(sizeof(*apic), GFP_KERNEL); | |
1615 | if (!apic) | |
1616 | goto nomem; | |
1617 | ||
ad312c7c | 1618 | vcpu->arch.apic = apic; |
97222cc8 | 1619 | |
afc20184 TY |
1620 | apic->regs = (void *)get_zeroed_page(GFP_KERNEL); |
1621 | if (!apic->regs) { | |
97222cc8 ED |
1622 | printk(KERN_ERR "malloc apic regs error for vcpu %x\n", |
1623 | vcpu->vcpu_id); | |
d589444e | 1624 | goto nomem_free_apic; |
97222cc8 | 1625 | } |
97222cc8 ED |
1626 | apic->vcpu = vcpu; |
1627 | ||
d3c7b77d MT |
1628 | hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC, |
1629 | HRTIMER_MODE_ABS); | |
e9d90d47 | 1630 | apic->lapic_timer.timer.function = apic_timer_fn; |
d3c7b77d | 1631 | |
c5cc421b GN |
1632 | /* |
1633 | * APIC is created enabled. This will prevent kvm_lapic_set_base from | |
1634 | * thinking that APIC satet has changed. | |
1635 | */ | |
1636 | vcpu->arch.apic_base = MSR_IA32_APICBASE_ENABLE; | |
6aed64a8 GN |
1637 | kvm_lapic_set_base(vcpu, |
1638 | APIC_DEFAULT_PHYS_BASE | MSR_IA32_APICBASE_ENABLE); | |
97222cc8 | 1639 | |
f8c1ea10 | 1640 | static_key_slow_inc(&apic_sw_disabled.key); /* sw disabled at reset */ |
c5ec1534 | 1641 | kvm_lapic_reset(vcpu); |
d76685c4 | 1642 | kvm_iodevice_init(&apic->dev, &apic_mmio_ops); |
97222cc8 ED |
1643 | |
1644 | return 0; | |
d589444e RR |
1645 | nomem_free_apic: |
1646 | kfree(apic); | |
97222cc8 | 1647 | nomem: |
97222cc8 ED |
1648 | return -ENOMEM; |
1649 | } | |
97222cc8 ED |
1650 | |
1651 | int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu) | |
1652 | { | |
ad312c7c | 1653 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
1654 | int highest_irr; |
1655 | ||
c48f1496 | 1656 | if (!kvm_vcpu_has_lapic(vcpu) || !apic_enabled(apic)) |
97222cc8 ED |
1657 | return -1; |
1658 | ||
6e5d865c | 1659 | apic_update_ppr(apic); |
97222cc8 ED |
1660 | highest_irr = apic_find_highest_irr(apic); |
1661 | if ((highest_irr == -1) || | |
c48f1496 | 1662 | ((highest_irr & 0xF0) <= kvm_apic_get_reg(apic, APIC_PROCPRI))) |
97222cc8 ED |
1663 | return -1; |
1664 | return highest_irr; | |
1665 | } | |
1666 | ||
40487c68 QH |
1667 | int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu) |
1668 | { | |
c48f1496 | 1669 | u32 lvt0 = kvm_apic_get_reg(vcpu->arch.apic, APIC_LVT0); |
40487c68 QH |
1670 | int r = 0; |
1671 | ||
c48f1496 | 1672 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) |
e7dca5c0 CL |
1673 | r = 1; |
1674 | if ((lvt0 & APIC_LVT_MASKED) == 0 && | |
1675 | GET_APIC_DELIVERY_MODE(lvt0) == APIC_MODE_EXTINT) | |
1676 | r = 1; | |
40487c68 QH |
1677 | return r; |
1678 | } | |
1679 | ||
1b9778da ED |
1680 | void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu) |
1681 | { | |
ad312c7c | 1682 | struct kvm_lapic *apic = vcpu->arch.apic; |
1b9778da | 1683 | |
c48f1496 | 1684 | if (!kvm_vcpu_has_lapic(vcpu)) |
54e9818f GN |
1685 | return; |
1686 | ||
1687 | if (atomic_read(&apic->lapic_timer.pending) > 0) { | |
f1ed0450 | 1688 | kvm_apic_local_deliver(apic, APIC_LVTT); |
fae0ba21 NA |
1689 | if (apic_lvtt_tscdeadline(apic)) |
1690 | apic->lapic_timer.tscdeadline = 0; | |
f1ed0450 | 1691 | atomic_set(&apic->lapic_timer.pending, 0); |
1b9778da ED |
1692 | } |
1693 | } | |
1694 | ||
97222cc8 ED |
1695 | int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu) |
1696 | { | |
1697 | int vector = kvm_apic_has_interrupt(vcpu); | |
ad312c7c | 1698 | struct kvm_lapic *apic = vcpu->arch.apic; |
97222cc8 ED |
1699 | |
1700 | if (vector == -1) | |
1701 | return -1; | |
1702 | ||
56cc2406 WL |
1703 | /* |
1704 | * We get here even with APIC virtualization enabled, if doing | |
1705 | * nested virtualization and L1 runs with the "acknowledge interrupt | |
1706 | * on exit" mode. Then we cannot inject the interrupt via RVI, | |
1707 | * because the process would deliver it through the IDT. | |
1708 | */ | |
1709 | ||
8680b94b | 1710 | apic_set_isr(vector, apic); |
97222cc8 ED |
1711 | apic_update_ppr(apic); |
1712 | apic_clear_irr(vector, apic); | |
1713 | return vector; | |
1714 | } | |
96ad2cc6 | 1715 | |
64eb0620 GN |
1716 | void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu, |
1717 | struct kvm_lapic_state *s) | |
96ad2cc6 | 1718 | { |
ad312c7c | 1719 | struct kvm_lapic *apic = vcpu->arch.apic; |
96ad2cc6 | 1720 | |
5dbc8f3f | 1721 | kvm_lapic_set_base(vcpu, vcpu->arch.apic_base); |
64eb0620 GN |
1722 | /* set SPIV separately to get count of SW disabled APICs right */ |
1723 | apic_set_spiv(apic, *((u32 *)(s->regs + APIC_SPIV))); | |
1724 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); | |
1e08ec4a GN |
1725 | /* call kvm_apic_set_id() to put apic into apic_map */ |
1726 | kvm_apic_set_id(apic, kvm_apic_id(apic)); | |
fc61b800 GN |
1727 | kvm_apic_set_version(vcpu); |
1728 | ||
96ad2cc6 | 1729 | apic_update_ppr(apic); |
d3c7b77d | 1730 | hrtimer_cancel(&apic->lapic_timer.timer); |
96ad2cc6 ED |
1731 | update_divide_count(apic); |
1732 | start_apic_timer(apic); | |
6e24a6ef | 1733 | apic->irr_pending = true; |
c7c9c56c YZ |
1734 | apic->isr_count = kvm_apic_vid_enabled(vcpu->kvm) ? |
1735 | 1 : count_vectors(apic->regs + APIC_ISR); | |
8680b94b | 1736 | apic->highest_isr_cache = -1; |
4114c27d WW |
1737 | if (kvm_x86_ops->hwapic_irr_update) |
1738 | kvm_x86_ops->hwapic_irr_update(vcpu, | |
1739 | apic_find_highest_irr(apic)); | |
c7c9c56c | 1740 | kvm_x86_ops->hwapic_isr_update(vcpu->kvm, apic_find_highest_isr(apic)); |
3842d135 | 1741 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
10606919 | 1742 | kvm_rtc_eoi_tracking_restore_one(vcpu); |
96ad2cc6 | 1743 | } |
a3d7f85f | 1744 | |
2f52d58c | 1745 | void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) |
a3d7f85f | 1746 | { |
a3d7f85f ED |
1747 | struct hrtimer *timer; |
1748 | ||
c48f1496 | 1749 | if (!kvm_vcpu_has_lapic(vcpu)) |
a3d7f85f ED |
1750 | return; |
1751 | ||
54e9818f | 1752 | timer = &vcpu->arch.apic->lapic_timer.timer; |
a3d7f85f | 1753 | if (hrtimer_cancel(timer)) |
beb20d52 | 1754 | hrtimer_start_expires(timer, HRTIMER_MODE_ABS); |
a3d7f85f | 1755 | } |
b93463aa | 1756 | |
ae7a2a3f MT |
1757 | /* |
1758 | * apic_sync_pv_eoi_from_guest - called on vmexit or cancel interrupt | |
1759 | * | |
1760 | * Detect whether guest triggered PV EOI since the | |
1761 | * last entry. If yes, set EOI on guests's behalf. | |
1762 | * Clear PV EOI in guest memory in any case. | |
1763 | */ | |
1764 | static void apic_sync_pv_eoi_from_guest(struct kvm_vcpu *vcpu, | |
1765 | struct kvm_lapic *apic) | |
1766 | { | |
1767 | bool pending; | |
1768 | int vector; | |
1769 | /* | |
1770 | * PV EOI state is derived from KVM_APIC_PV_EOI_PENDING in host | |
1771 | * and KVM_PV_EOI_ENABLED in guest memory as follows: | |
1772 | * | |
1773 | * KVM_APIC_PV_EOI_PENDING is unset: | |
1774 | * -> host disabled PV EOI. | |
1775 | * KVM_APIC_PV_EOI_PENDING is set, KVM_PV_EOI_ENABLED is set: | |
1776 | * -> host enabled PV EOI, guest did not execute EOI yet. | |
1777 | * KVM_APIC_PV_EOI_PENDING is set, KVM_PV_EOI_ENABLED is unset: | |
1778 | * -> host enabled PV EOI, guest executed EOI. | |
1779 | */ | |
1780 | BUG_ON(!pv_eoi_enabled(vcpu)); | |
1781 | pending = pv_eoi_get_pending(vcpu); | |
1782 | /* | |
1783 | * Clear pending bit in any case: it will be set again on vmentry. | |
1784 | * While this might not be ideal from performance point of view, | |
1785 | * this makes sure pv eoi is only enabled when we know it's safe. | |
1786 | */ | |
1787 | pv_eoi_clr_pending(vcpu); | |
1788 | if (pending) | |
1789 | return; | |
1790 | vector = apic_set_eoi(apic); | |
1791 | trace_kvm_pv_eoi(apic, vector); | |
1792 | } | |
1793 | ||
b93463aa AK |
1794 | void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu) |
1795 | { | |
1796 | u32 data; | |
b93463aa | 1797 | |
ae7a2a3f MT |
1798 | if (test_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention)) |
1799 | apic_sync_pv_eoi_from_guest(vcpu, vcpu->arch.apic); | |
1800 | ||
41383771 | 1801 | if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention)) |
b93463aa AK |
1802 | return; |
1803 | ||
fda4e2e8 AH |
1804 | kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.apic->vapic_cache, &data, |
1805 | sizeof(u32)); | |
b93463aa AK |
1806 | |
1807 | apic_set_tpr(vcpu->arch.apic, data & 0xff); | |
1808 | } | |
1809 | ||
ae7a2a3f MT |
1810 | /* |
1811 | * apic_sync_pv_eoi_to_guest - called before vmentry | |
1812 | * | |
1813 | * Detect whether it's safe to enable PV EOI and | |
1814 | * if yes do so. | |
1815 | */ | |
1816 | static void apic_sync_pv_eoi_to_guest(struct kvm_vcpu *vcpu, | |
1817 | struct kvm_lapic *apic) | |
1818 | { | |
1819 | if (!pv_eoi_enabled(vcpu) || | |
1820 | /* IRR set or many bits in ISR: could be nested. */ | |
1821 | apic->irr_pending || | |
1822 | /* Cache not set: could be safe but we don't bother. */ | |
1823 | apic->highest_isr_cache == -1 || | |
1824 | /* Need EOI to update ioapic. */ | |
1825 | kvm_ioapic_handles_vector(vcpu->kvm, apic->highest_isr_cache)) { | |
1826 | /* | |
1827 | * PV EOI was disabled by apic_sync_pv_eoi_from_guest | |
1828 | * so we need not do anything here. | |
1829 | */ | |
1830 | return; | |
1831 | } | |
1832 | ||
1833 | pv_eoi_set_pending(apic->vcpu); | |
1834 | } | |
1835 | ||
b93463aa AK |
1836 | void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu) |
1837 | { | |
1838 | u32 data, tpr; | |
1839 | int max_irr, max_isr; | |
ae7a2a3f | 1840 | struct kvm_lapic *apic = vcpu->arch.apic; |
b93463aa | 1841 | |
ae7a2a3f MT |
1842 | apic_sync_pv_eoi_to_guest(vcpu, apic); |
1843 | ||
41383771 | 1844 | if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention)) |
b93463aa AK |
1845 | return; |
1846 | ||
c48f1496 | 1847 | tpr = kvm_apic_get_reg(apic, APIC_TASKPRI) & 0xff; |
b93463aa AK |
1848 | max_irr = apic_find_highest_irr(apic); |
1849 | if (max_irr < 0) | |
1850 | max_irr = 0; | |
1851 | max_isr = apic_find_highest_isr(apic); | |
1852 | if (max_isr < 0) | |
1853 | max_isr = 0; | |
1854 | data = (tpr & 0xff) | ((max_isr & 0xf0) << 8) | (max_irr << 24); | |
1855 | ||
fda4e2e8 AH |
1856 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apic->vapic_cache, &data, |
1857 | sizeof(u32)); | |
b93463aa AK |
1858 | } |
1859 | ||
fda4e2e8 | 1860 | int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr) |
b93463aa | 1861 | { |
fda4e2e8 AH |
1862 | if (vapic_addr) { |
1863 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, | |
1864 | &vcpu->arch.apic->vapic_cache, | |
1865 | vapic_addr, sizeof(u32))) | |
1866 | return -EINVAL; | |
41383771 | 1867 | __set_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention); |
fda4e2e8 | 1868 | } else { |
41383771 | 1869 | __clear_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention); |
fda4e2e8 AH |
1870 | } |
1871 | ||
1872 | vcpu->arch.apic->vapic_addr = vapic_addr; | |
1873 | return 0; | |
b93463aa | 1874 | } |
0105d1a5 GN |
1875 | |
1876 | int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1877 | { | |
1878 | struct kvm_lapic *apic = vcpu->arch.apic; | |
1879 | u32 reg = (msr - APIC_BASE_MSR) << 4; | |
1880 | ||
1881 | if (!irqchip_in_kernel(vcpu->kvm) || !apic_x2apic_mode(apic)) | |
1882 | return 1; | |
1883 | ||
c69d3d9b NA |
1884 | if (reg == APIC_ICR2) |
1885 | return 1; | |
1886 | ||
0105d1a5 | 1887 | /* if this is ICR write vector before command */ |
decdc283 | 1888 | if (reg == APIC_ICR) |
0105d1a5 GN |
1889 | apic_reg_write(apic, APIC_ICR2, (u32)(data >> 32)); |
1890 | return apic_reg_write(apic, reg, (u32)data); | |
1891 | } | |
1892 | ||
1893 | int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data) | |
1894 | { | |
1895 | struct kvm_lapic *apic = vcpu->arch.apic; | |
1896 | u32 reg = (msr - APIC_BASE_MSR) << 4, low, high = 0; | |
1897 | ||
1898 | if (!irqchip_in_kernel(vcpu->kvm) || !apic_x2apic_mode(apic)) | |
1899 | return 1; | |
1900 | ||
c69d3d9b NA |
1901 | if (reg == APIC_DFR || reg == APIC_ICR2) { |
1902 | apic_debug("KVM_APIC_READ: read x2apic reserved register %x\n", | |
1903 | reg); | |
1904 | return 1; | |
1905 | } | |
1906 | ||
0105d1a5 GN |
1907 | if (apic_reg_read(apic, reg, 4, &low)) |
1908 | return 1; | |
decdc283 | 1909 | if (reg == APIC_ICR) |
0105d1a5 GN |
1910 | apic_reg_read(apic, APIC_ICR2, 4, &high); |
1911 | ||
1912 | *data = (((u64)high) << 32) | low; | |
1913 | ||
1914 | return 0; | |
1915 | } | |
10388a07 GN |
1916 | |
1917 | int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 reg, u64 data) | |
1918 | { | |
1919 | struct kvm_lapic *apic = vcpu->arch.apic; | |
1920 | ||
c48f1496 | 1921 | if (!kvm_vcpu_has_lapic(vcpu)) |
10388a07 GN |
1922 | return 1; |
1923 | ||
1924 | /* if this is ICR write vector before command */ | |
1925 | if (reg == APIC_ICR) | |
1926 | apic_reg_write(apic, APIC_ICR2, (u32)(data >> 32)); | |
1927 | return apic_reg_write(apic, reg, (u32)data); | |
1928 | } | |
1929 | ||
1930 | int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 reg, u64 *data) | |
1931 | { | |
1932 | struct kvm_lapic *apic = vcpu->arch.apic; | |
1933 | u32 low, high = 0; | |
1934 | ||
c48f1496 | 1935 | if (!kvm_vcpu_has_lapic(vcpu)) |
10388a07 GN |
1936 | return 1; |
1937 | ||
1938 | if (apic_reg_read(apic, reg, 4, &low)) | |
1939 | return 1; | |
1940 | if (reg == APIC_ICR) | |
1941 | apic_reg_read(apic, APIC_ICR2, 4, &high); | |
1942 | ||
1943 | *data = (((u64)high) << 32) | low; | |
1944 | ||
1945 | return 0; | |
1946 | } | |
ae7a2a3f MT |
1947 | |
1948 | int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data) | |
1949 | { | |
1950 | u64 addr = data & ~KVM_MSR_ENABLED; | |
1951 | if (!IS_ALIGNED(addr, 4)) | |
1952 | return 1; | |
1953 | ||
1954 | vcpu->arch.pv_eoi.msr_val = data; | |
1955 | if (!pv_eoi_enabled(vcpu)) | |
1956 | return 0; | |
1957 | return kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.pv_eoi.data, | |
8f964525 | 1958 | addr, sizeof(u8)); |
ae7a2a3f | 1959 | } |
c5cc421b | 1960 | |
66450a21 JK |
1961 | void kvm_apic_accept_events(struct kvm_vcpu *vcpu) |
1962 | { | |
1963 | struct kvm_lapic *apic = vcpu->arch.apic; | |
2b4a273b | 1964 | u8 sipi_vector; |
299018f4 | 1965 | unsigned long pe; |
66450a21 | 1966 | |
299018f4 | 1967 | if (!kvm_vcpu_has_lapic(vcpu) || !apic->pending_events) |
66450a21 JK |
1968 | return; |
1969 | ||
299018f4 GN |
1970 | pe = xchg(&apic->pending_events, 0); |
1971 | ||
1972 | if (test_bit(KVM_APIC_INIT, &pe)) { | |
66450a21 JK |
1973 | kvm_lapic_reset(vcpu); |
1974 | kvm_vcpu_reset(vcpu); | |
1975 | if (kvm_vcpu_is_bsp(apic->vcpu)) | |
1976 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
1977 | else | |
1978 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; | |
1979 | } | |
299018f4 | 1980 | if (test_bit(KVM_APIC_SIPI, &pe) && |
66450a21 JK |
1981 | vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { |
1982 | /* evaluate pending_events before reading the vector */ | |
1983 | smp_rmb(); | |
1984 | sipi_vector = apic->sipi_vector; | |
98eff52a | 1985 | apic_debug("vcpu %d received sipi with vector # %x\n", |
66450a21 JK |
1986 | vcpu->vcpu_id, sipi_vector); |
1987 | kvm_vcpu_deliver_sipi_vector(vcpu, sipi_vector); | |
1988 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
1989 | } | |
1990 | } | |
1991 | ||
c5cc421b GN |
1992 | void kvm_lapic_init(void) |
1993 | { | |
1994 | /* do not patch jump label more than once per second */ | |
1995 | jump_label_rate_limit(&apic_hw_disabled, HZ); | |
f8c1ea10 | 1996 | jump_label_rate_limit(&apic_sw_disabled, HZ); |
c5cc421b | 1997 | } |