blob: 57dcbd4308fa8f69efec6462a52a13b594bfbeb8 [file] [log] [blame]
Eddie Dong97222cc2007-09-12 10:58:04 +03001
2/*
3 * Local APIC virtualization
4 *
5 * Copyright (C) 2006 Qumranet, Inc.
6 * Copyright (C) 2007 Novell
7 * Copyright (C) 2007 Intel
Nicolas Kaiser9611c182010-10-06 14:23:22 +02008 * Copyright 2009 Red Hat, Inc. and/or its affiliates.
Eddie Dong97222cc2007-09-12 10:58:04 +03009 *
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
Avi Kivityedf88412007-12-16 11:02:48 +020021#include <linux/kvm_host.h>
Eddie Dong97222cc2007-09-12 10:58:04 +030022#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>
Roman Zippel6f6d6a12008-05-01 04:34:28 -070029#include <linux/math64.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090030#include <linux/slab.h>
Eddie Dong97222cc2007-09-12 10:58:04 +030031#include <asm/processor.h>
32#include <asm/msr.h>
33#include <asm/page.h>
34#include <asm/current.h>
35#include <asm/apicdef.h>
Arun Sharma600634972011-07-26 16:09:06 -070036#include <linux/atomic.h>
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -030037#include "kvm_cache_regs.h"
Eddie Dong97222cc2007-09-12 10:58:04 +030038#include "irq.h"
Marcelo Tosatti229456f2009-06-17 09:22:14 -030039#include "trace.h"
Gleb Natapovfc61b802009-07-05 17:39:35 +030040#include "x86.h"
Eddie Dong97222cc2007-09-12 10:58:04 +030041
Marcelo Tosattib682b812009-02-10 20:41:41 -020042#ifndef CONFIG_X86_64
43#define mod_64(x, y) ((x) - (y) * div64_u64(x, y))
44#else
45#define mod_64(x, y) ((x) % (y))
46#endif
47
Eddie Dong97222cc2007-09-12 10:58:04 +030048#define PRId64 "d"
49#define PRIx64 "llx"
50#define PRIu64 "u"
51#define PRIo64 "o"
52
53#define APIC_BUS_CYCLE_NS 1
54
55/* #define apic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg) */
56#define apic_debug(fmt, arg...)
57
58#define APIC_LVT_NUM 6
59/* 14 is the version for Xeon and Pentium 8.4.8*/
60#define APIC_VERSION (0x14UL | ((APIC_LVT_NUM - 1) << 16))
61#define LAPIC_MMIO_LENGTH (1 << 12)
62/* followed define is not in apicdef.h */
63#define APIC_SHORT_MASK 0xc0000
64#define APIC_DEST_NOSHORT 0x0
65#define APIC_DEST_MASK 0x800
66#define MAX_APIC_VECTOR 256
67
68#define VEC_POS(v) ((v) & (32 - 1))
69#define REG_POS(v) (((v) >> 5) << 4)
Zhang Xiantaoad312c72007-12-13 23:50:52 +080070
Eddie Dong97222cc2007-09-12 10:58:04 +030071static inline u32 apic_get_reg(struct kvm_lapic *apic, int reg_off)
72{
73 return *((u32 *) (apic->regs + reg_off));
74}
75
76static inline void apic_set_reg(struct kvm_lapic *apic, int reg_off, u32 val)
77{
78 *((u32 *) (apic->regs + reg_off)) = val;
79}
80
81static inline int apic_test_and_set_vector(int vec, void *bitmap)
82{
83 return test_and_set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec));
84}
85
86static inline int apic_test_and_clear_vector(int vec, void *bitmap)
87{
88 return test_and_clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec));
89}
90
91static inline void apic_set_vector(int vec, void *bitmap)
92{
93 set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec));
94}
95
96static inline void apic_clear_vector(int vec, void *bitmap)
97{
98 clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec));
99}
100
101static inline int apic_hw_enabled(struct kvm_lapic *apic)
102{
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800103 return (apic)->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE;
Eddie Dong97222cc2007-09-12 10:58:04 +0300104}
105
106static inline int apic_sw_enabled(struct kvm_lapic *apic)
107{
108 return apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_APIC_ENABLED;
109}
110
111static inline int apic_enabled(struct kvm_lapic *apic)
112{
113 return apic_sw_enabled(apic) && apic_hw_enabled(apic);
114}
115
116#define LVT_MASK \
117 (APIC_LVT_MASKED | APIC_SEND_PENDING | APIC_VECTOR_MASK)
118
119#define LINT_MASK \
120 (LVT_MASK | APIC_MODE_MASK | APIC_INPUT_POLARITY | \
121 APIC_LVT_REMOTE_IRR | APIC_LVT_LEVEL_TRIGGER)
122
123static inline int kvm_apic_id(struct kvm_lapic *apic)
124{
125 return (apic_get_reg(apic, APIC_ID) >> 24) & 0xff;
126}
127
128static inline int apic_lvt_enabled(struct kvm_lapic *apic, int lvt_type)
129{
130 return !(apic_get_reg(apic, lvt_type) & APIC_LVT_MASKED);
131}
132
133static inline int apic_lvt_vector(struct kvm_lapic *apic, int lvt_type)
134{
135 return apic_get_reg(apic, lvt_type) & APIC_VECTOR_MASK;
136}
137
138static inline int apic_lvtt_period(struct kvm_lapic *apic)
139{
140 return apic_get_reg(apic, APIC_LVTT) & APIC_LVT_TIMER_PERIODIC;
141}
142
Jan Kiszkacc6e4622008-10-20 10:20:03 +0200143static inline int apic_lvt_nmi_mode(u32 lvt_val)
144{
145 return (lvt_val & (APIC_MODE_MASK | APIC_LVT_MASKED)) == APIC_DM_NMI;
146}
147
Gleb Natapovfc61b802009-07-05 17:39:35 +0300148void kvm_apic_set_version(struct kvm_vcpu *vcpu)
149{
150 struct kvm_lapic *apic = vcpu->arch.apic;
151 struct kvm_cpuid_entry2 *feat;
152 u32 v = APIC_VERSION;
153
154 if (!irqchip_in_kernel(vcpu->kvm))
155 return;
156
157 feat = kvm_find_cpuid_entry(apic->vcpu, 0x1, 0);
158 if (feat && (feat->ecx & (1 << (X86_FEATURE_X2APIC & 31))))
159 v |= APIC_LVR_DIRECTED_EOI;
160 apic_set_reg(apic, APIC_LVR, v);
161}
162
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300163static inline int apic_x2apic_mode(struct kvm_lapic *apic)
164{
165 return apic->vcpu->arch.apic_base & X2APIC_ENABLE;
166}
167
Eddie Dong97222cc2007-09-12 10:58:04 +0300168static unsigned int apic_lvt_mask[APIC_LVT_NUM] = {
169 LVT_MASK | APIC_LVT_TIMER_PERIODIC, /* LVTT */
170 LVT_MASK | APIC_MODE_MASK, /* LVTTHMR */
171 LVT_MASK | APIC_MODE_MASK, /* LVTPC */
172 LINT_MASK, LINT_MASK, /* LVT0-1 */
173 LVT_MASK /* LVTERR */
174};
175
176static int find_highest_vector(void *bitmap)
177{
178 u32 *word = bitmap;
179 int word_offset = MAX_APIC_VECTOR >> 5;
180
181 while ((word_offset != 0) && (word[(--word_offset) << 2] == 0))
182 continue;
183
184 if (likely(!word_offset && !word[0]))
185 return -1;
186 else
187 return fls(word[word_offset << 2]) - 1 + (word_offset << 5);
188}
189
190static inline int apic_test_and_set_irr(int vec, struct kvm_lapic *apic)
191{
Gleb Natapov33e4c682009-06-11 11:06:51 +0300192 apic->irr_pending = true;
Eddie Dong97222cc2007-09-12 10:58:04 +0300193 return apic_test_and_set_vector(vec, apic->regs + APIC_IRR);
194}
195
Gleb Natapov33e4c682009-06-11 11:06:51 +0300196static inline int apic_search_irr(struct kvm_lapic *apic)
Eddie Dong97222cc2007-09-12 10:58:04 +0300197{
Gleb Natapov33e4c682009-06-11 11:06:51 +0300198 return find_highest_vector(apic->regs + APIC_IRR);
Eddie Dong97222cc2007-09-12 10:58:04 +0300199}
200
201static inline int apic_find_highest_irr(struct kvm_lapic *apic)
202{
203 int result;
204
Gleb Natapov33e4c682009-06-11 11:06:51 +0300205 if (!apic->irr_pending)
206 return -1;
207
208 result = apic_search_irr(apic);
Eddie Dong97222cc2007-09-12 10:58:04 +0300209 ASSERT(result == -1 || result >= 16);
210
211 return result;
212}
213
Gleb Natapov33e4c682009-06-11 11:06:51 +0300214static inline void apic_clear_irr(int vec, struct kvm_lapic *apic)
215{
216 apic->irr_pending = false;
217 apic_clear_vector(vec, apic->regs + APIC_IRR);
218 if (apic_search_irr(apic) != -1)
219 apic->irr_pending = true;
220}
221
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800222int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu)
223{
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800224 struct kvm_lapic *apic = vcpu->arch.apic;
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800225 int highest_irr;
226
Gleb Natapov33e4c682009-06-11 11:06:51 +0300227 /* This may race with setting of irr in __apic_accept_irq() and
228 * value returned may be wrong, but kvm_vcpu_kick() in __apic_accept_irq
229 * will cause vmexit immediately and the value will be recalculated
230 * on the next vmentry.
231 */
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800232 if (!apic)
233 return 0;
234 highest_irr = apic_find_highest_irr(apic);
235
236 return highest_irr;
237}
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800238
Gleb Natapov6da7e3f2009-03-05 16:34:44 +0200239static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
240 int vector, int level, int trig_mode);
241
Gleb Natapov58c2dde2009-03-05 16:35:04 +0200242int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq)
Eddie Dong97222cc2007-09-12 10:58:04 +0300243{
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800244 struct kvm_lapic *apic = vcpu->arch.apic;
Zhang Xiantao8be54532007-12-02 22:35:57 +0800245
Gleb Natapov58c2dde2009-03-05 16:35:04 +0200246 return __apic_accept_irq(apic, irq->delivery_mode, irq->vector,
247 irq->level, irq->trig_mode);
Eddie Dong97222cc2007-09-12 10:58:04 +0300248}
249
250static inline int apic_find_highest_isr(struct kvm_lapic *apic)
251{
252 int result;
253
254 result = find_highest_vector(apic->regs + APIC_ISR);
255 ASSERT(result == -1 || result >= 16);
256
257 return result;
258}
259
260static void apic_update_ppr(struct kvm_lapic *apic)
261{
Avi Kivity3842d132010-07-27 12:30:24 +0300262 u32 tpr, isrv, ppr, old_ppr;
Eddie Dong97222cc2007-09-12 10:58:04 +0300263 int isr;
264
Avi Kivity3842d132010-07-27 12:30:24 +0300265 old_ppr = apic_get_reg(apic, APIC_PROCPRI);
Eddie Dong97222cc2007-09-12 10:58:04 +0300266 tpr = apic_get_reg(apic, APIC_TASKPRI);
267 isr = apic_find_highest_isr(apic);
268 isrv = (isr != -1) ? isr : 0;
269
270 if ((tpr & 0xf0) >= (isrv & 0xf0))
271 ppr = tpr & 0xff;
272 else
273 ppr = isrv & 0xf0;
274
275 apic_debug("vlapic %p, ppr 0x%x, isr 0x%x, isrv 0x%x",
276 apic, ppr, isr, isrv);
277
Avi Kivity3842d132010-07-27 12:30:24 +0300278 if (old_ppr != ppr) {
279 apic_set_reg(apic, APIC_PROCPRI, ppr);
Avi Kivity83bcacb2010-10-25 15:23:55 +0200280 if (ppr < old_ppr)
281 kvm_make_request(KVM_REQ_EVENT, apic->vcpu);
Avi Kivity3842d132010-07-27 12:30:24 +0300282 }
Eddie Dong97222cc2007-09-12 10:58:04 +0300283}
284
285static void apic_set_tpr(struct kvm_lapic *apic, u32 tpr)
286{
287 apic_set_reg(apic, APIC_TASKPRI, tpr);
288 apic_update_ppr(apic);
289}
290
291int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
292{
Gleb Natapov343f94f2009-03-05 16:34:54 +0200293 return dest == 0xff || kvm_apic_id(apic) == dest;
Eddie Dong97222cc2007-09-12 10:58:04 +0300294}
295
296int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
297{
298 int result = 0;
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300299 u32 logical_id;
300
301 if (apic_x2apic_mode(apic)) {
302 logical_id = apic_get_reg(apic, APIC_LDR);
303 return logical_id & mda;
304 }
Eddie Dong97222cc2007-09-12 10:58:04 +0300305
306 logical_id = GET_APIC_LOGICAL_ID(apic_get_reg(apic, APIC_LDR));
307
308 switch (apic_get_reg(apic, APIC_DFR)) {
309 case APIC_DFR_FLAT:
310 if (logical_id & mda)
311 result = 1;
312 break;
313 case APIC_DFR_CLUSTER:
314 if (((logical_id >> 4) == (mda >> 0x4))
315 && (logical_id & mda & 0xf))
316 result = 1;
317 break;
318 default:
319 printk(KERN_WARNING "Bad DFR vcpu %d: %08x\n",
320 apic->vcpu->vcpu_id, apic_get_reg(apic, APIC_DFR));
321 break;
322 }
323
324 return result;
325}
326
Gleb Natapov343f94f2009-03-05 16:34:54 +0200327int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
Eddie Dong97222cc2007-09-12 10:58:04 +0300328 int short_hand, int dest, int dest_mode)
329{
330 int result = 0;
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800331 struct kvm_lapic *target = vcpu->arch.apic;
Eddie Dong97222cc2007-09-12 10:58:04 +0300332
333 apic_debug("target %p, source %p, dest 0x%x, "
Gleb Natapov343f94f2009-03-05 16:34:54 +0200334 "dest_mode 0x%x, short_hand 0x%x\n",
Eddie Dong97222cc2007-09-12 10:58:04 +0300335 target, source, dest, dest_mode, short_hand);
336
Zachary Amsdenbd371392010-06-14 11:42:15 -1000337 ASSERT(target);
Eddie Dong97222cc2007-09-12 10:58:04 +0300338 switch (short_hand) {
339 case APIC_DEST_NOSHORT:
Gleb Natapov343f94f2009-03-05 16:34:54 +0200340 if (dest_mode == 0)
Eddie Dong97222cc2007-09-12 10:58:04 +0300341 /* Physical mode. */
Gleb Natapov343f94f2009-03-05 16:34:54 +0200342 result = kvm_apic_match_physical_addr(target, dest);
343 else
Eddie Dong97222cc2007-09-12 10:58:04 +0300344 /* Logical mode. */
345 result = kvm_apic_match_logical_addr(target, dest);
346 break;
347 case APIC_DEST_SELF:
Gleb Natapov343f94f2009-03-05 16:34:54 +0200348 result = (target == source);
Eddie Dong97222cc2007-09-12 10:58:04 +0300349 break;
350 case APIC_DEST_ALLINC:
351 result = 1;
352 break;
353 case APIC_DEST_ALLBUT:
Gleb Natapov343f94f2009-03-05 16:34:54 +0200354 result = (target != source);
Eddie Dong97222cc2007-09-12 10:58:04 +0300355 break;
356 default:
357 printk(KERN_WARNING "Bad dest shorthand value %x\n",
358 short_hand);
359 break;
360 }
361
362 return result;
363}
364
365/*
366 * Add a pending IRQ into lapic.
367 * Return 1 if successfully added and 0 if discarded.
368 */
369static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
370 int vector, int level, int trig_mode)
371{
Gleb Natapov6da7e3f2009-03-05 16:34:44 +0200372 int result = 0;
He, Qingc5ec1532007-09-03 17:07:41 +0300373 struct kvm_vcpu *vcpu = apic->vcpu;
Eddie Dong97222cc2007-09-12 10:58:04 +0300374
375 switch (delivery_mode) {
Eddie Dong97222cc2007-09-12 10:58:04 +0300376 case APIC_DM_LOWEST:
Gleb Natapove1035712009-03-05 16:34:59 +0200377 vcpu->arch.apic_arb_prio++;
378 case APIC_DM_FIXED:
Eddie Dong97222cc2007-09-12 10:58:04 +0300379 /* FIXME add logic for vcpu on reset */
380 if (unlikely(!apic_enabled(apic)))
381 break;
382
Avi Kivitya5d36f82009-12-29 12:42:16 +0200383 if (trig_mode) {
384 apic_debug("level trig mode for vector %d", vector);
385 apic_set_vector(vector, apic->regs + APIC_TMR);
386 } else
387 apic_clear_vector(vector, apic->regs + APIC_TMR);
388
Gleb Natapov6da7e3f2009-03-05 16:34:44 +0200389 result = !apic_test_and_set_irr(vector, apic);
Gleb Natapov1000ff82009-07-07 16:00:57 +0300390 trace_kvm_apic_accept_irq(vcpu->vcpu_id, delivery_mode,
Gleb Natapov4da74892009-08-27 16:25:04 +0300391 trig_mode, vector, !result);
Gleb Natapov6da7e3f2009-03-05 16:34:44 +0200392 if (!result) {
393 if (trig_mode)
394 apic_debug("level trig mode repeatedly for "
395 "vector %d", vector);
Eddie Dong97222cc2007-09-12 10:58:04 +0300396 break;
397 }
398
Avi Kivity3842d132010-07-27 12:30:24 +0300399 kvm_make_request(KVM_REQ_EVENT, vcpu);
Marcelo Tosattid7690172008-09-08 15:23:48 -0300400 kvm_vcpu_kick(vcpu);
Eddie Dong97222cc2007-09-12 10:58:04 +0300401 break;
402
403 case APIC_DM_REMRD:
404 printk(KERN_DEBUG "Ignoring delivery mode 3\n");
405 break;
406
407 case APIC_DM_SMI:
408 printk(KERN_DEBUG "Ignoring guest SMI\n");
409 break;
Sheng Yang3419ffc2008-05-15 09:52:48 +0800410
Eddie Dong97222cc2007-09-12 10:58:04 +0300411 case APIC_DM_NMI:
Gleb Natapov6da7e3f2009-03-05 16:34:44 +0200412 result = 1;
Sheng Yang3419ffc2008-05-15 09:52:48 +0800413 kvm_inject_nmi(vcpu);
Jan Kiszka26df99c2008-09-26 09:30:54 +0200414 kvm_vcpu_kick(vcpu);
Eddie Dong97222cc2007-09-12 10:58:04 +0300415 break;
416
417 case APIC_DM_INIT:
He, Qingc5ec1532007-09-03 17:07:41 +0300418 if (level) {
Gleb Natapov6da7e3f2009-03-05 16:34:44 +0200419 result = 1;
Avi Kivitya4535292008-04-13 17:54:35 +0300420 vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED;
Avi Kivity3842d132010-07-27 12:30:24 +0300421 kvm_make_request(KVM_REQ_EVENT, vcpu);
He, Qingc5ec1532007-09-03 17:07:41 +0300422 kvm_vcpu_kick(vcpu);
423 } else {
Jan Kiszka1b10bf32008-09-30 10:41:06 +0200424 apic_debug("Ignoring de-assert INIT to vcpu %d\n",
425 vcpu->vcpu_id);
He, Qingc5ec1532007-09-03 17:07:41 +0300426 }
Eddie Dong97222cc2007-09-12 10:58:04 +0300427 break;
428
429 case APIC_DM_STARTUP:
Jan Kiszka1b10bf32008-09-30 10:41:06 +0200430 apic_debug("SIPI to vcpu %d vector 0x%02x\n",
431 vcpu->vcpu_id, vector);
Avi Kivitya4535292008-04-13 17:54:35 +0300432 if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) {
Gleb Natapov6da7e3f2009-03-05 16:34:44 +0200433 result = 1;
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800434 vcpu->arch.sipi_vector = vector;
Avi Kivitya4535292008-04-13 17:54:35 +0300435 vcpu->arch.mp_state = KVM_MP_STATE_SIPI_RECEIVED;
Avi Kivity3842d132010-07-27 12:30:24 +0300436 kvm_make_request(KVM_REQ_EVENT, vcpu);
Marcelo Tosattid7690172008-09-08 15:23:48 -0300437 kvm_vcpu_kick(vcpu);
He, Qingc5ec1532007-09-03 17:07:41 +0300438 }
Eddie Dong97222cc2007-09-12 10:58:04 +0300439 break;
440
Jan Kiszka23930f92008-09-26 09:30:52 +0200441 case APIC_DM_EXTINT:
442 /*
443 * Should only be called by kvm_apic_local_deliver() with LVT0,
444 * before NMI watchdog was enabled. Already handled by
445 * kvm_apic_accept_pic_intr().
446 */
447 break;
448
Eddie Dong97222cc2007-09-12 10:58:04 +0300449 default:
450 printk(KERN_ERR "TODO: unsupported delivery mode %x\n",
451 delivery_mode);
452 break;
453 }
454 return result;
455}
456
Gleb Natapove1035712009-03-05 16:34:59 +0200457int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
Eddie Dong97222cc2007-09-12 10:58:04 +0300458{
Gleb Natapove1035712009-03-05 16:34:59 +0200459 return vcpu1->arch.apic_arb_prio - vcpu2->arch.apic_arb_prio;
Zhang Xiantao8be54532007-12-02 22:35:57 +0800460}
461
Eddie Dong97222cc2007-09-12 10:58:04 +0300462static void apic_set_eoi(struct kvm_lapic *apic)
463{
464 int vector = apic_find_highest_isr(apic);
Marcelo Tosattif5244722008-07-26 17:01:00 -0300465 int trigger_mode;
Eddie Dong97222cc2007-09-12 10:58:04 +0300466 /*
467 * Not every write EOI will has corresponding ISR,
468 * one example is when Kernel check timer on setup_IO_APIC
469 */
470 if (vector == -1)
471 return;
472
473 apic_clear_vector(vector, apic->regs + APIC_ISR);
474 apic_update_ppr(apic);
475
476 if (apic_test_and_clear_vector(vector, apic->regs + APIC_TMR))
Marcelo Tosattif5244722008-07-26 17:01:00 -0300477 trigger_mode = IOAPIC_LEVEL_TRIG;
478 else
479 trigger_mode = IOAPIC_EDGE_TRIG;
Gleb Natapoveba02262009-08-24 11:54:25 +0300480 if (!(apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_DIRECTED_EOI))
Gleb Natapovfc61b802009-07-05 17:39:35 +0300481 kvm_ioapic_update_eoi(apic->vcpu->kvm, vector, trigger_mode);
Avi Kivity3842d132010-07-27 12:30:24 +0300482 kvm_make_request(KVM_REQ_EVENT, apic->vcpu);
Eddie Dong97222cc2007-09-12 10:58:04 +0300483}
484
485static void apic_send_ipi(struct kvm_lapic *apic)
486{
487 u32 icr_low = apic_get_reg(apic, APIC_ICR);
488 u32 icr_high = apic_get_reg(apic, APIC_ICR2);
Gleb Natapov58c2dde2009-03-05 16:35:04 +0200489 struct kvm_lapic_irq irq;
Eddie Dong97222cc2007-09-12 10:58:04 +0300490
Gleb Natapov58c2dde2009-03-05 16:35:04 +0200491 irq.vector = icr_low & APIC_VECTOR_MASK;
492 irq.delivery_mode = icr_low & APIC_MODE_MASK;
493 irq.dest_mode = icr_low & APIC_DEST_MASK;
494 irq.level = icr_low & APIC_INT_ASSERT;
495 irq.trig_mode = icr_low & APIC_INT_LEVELTRIG;
496 irq.shorthand = icr_low & APIC_SHORT_MASK;
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300497 if (apic_x2apic_mode(apic))
498 irq.dest_id = icr_high;
499 else
500 irq.dest_id = GET_APIC_DEST_FIELD(icr_high);
Eddie Dong97222cc2007-09-12 10:58:04 +0300501
Gleb Natapov1000ff82009-07-07 16:00:57 +0300502 trace_kvm_apic_ipi(icr_low, irq.dest_id);
503
Eddie Dong97222cc2007-09-12 10:58:04 +0300504 apic_debug("icr_high 0x%x, icr_low 0x%x, "
505 "short_hand 0x%x, dest 0x%x, trig_mode 0x%x, level 0x%x, "
506 "dest_mode 0x%x, delivery_mode 0x%x, vector 0x%x\n",
Glauber Costa9b5843d2009-04-29 17:29:09 -0400507 icr_high, icr_low, irq.shorthand, irq.dest_id,
Gleb Natapov58c2dde2009-03-05 16:35:04 +0200508 irq.trig_mode, irq.level, irq.dest_mode, irq.delivery_mode,
509 irq.vector);
Eddie Dong97222cc2007-09-12 10:58:04 +0300510
Gleb Natapov58c2dde2009-03-05 16:35:04 +0200511 kvm_irq_delivery_to_apic(apic->vcpu->kvm, apic, &irq);
Eddie Dong97222cc2007-09-12 10:58:04 +0300512}
513
514static u32 apic_get_tmcct(struct kvm_lapic *apic)
515{
Marcelo Tosattib682b812009-02-10 20:41:41 -0200516 ktime_t remaining;
517 s64 ns;
Kevin Pedretti9da8f4e2007-10-21 08:55:50 +0200518 u32 tmcct;
Eddie Dong97222cc2007-09-12 10:58:04 +0300519
520 ASSERT(apic != NULL);
521
Kevin Pedretti9da8f4e2007-10-21 08:55:50 +0200522 /* if initial count is 0, current count should also be 0 */
Marcelo Tosattib682b812009-02-10 20:41:41 -0200523 if (apic_get_reg(apic, APIC_TMICT) == 0)
Kevin Pedretti9da8f4e2007-10-21 08:55:50 +0200524 return 0;
525
Marcelo Tosattiace15462009-10-08 10:55:03 -0300526 remaining = hrtimer_get_remaining(&apic->lapic_timer.timer);
Marcelo Tosattib682b812009-02-10 20:41:41 -0200527 if (ktime_to_ns(remaining) < 0)
528 remaining = ktime_set(0, 0);
Eddie Dong97222cc2007-09-12 10:58:04 +0300529
Marcelo Tosattid3c7b772009-02-23 10:57:41 -0300530 ns = mod_64(ktime_to_ns(remaining), apic->lapic_timer.period);
531 tmcct = div64_u64(ns,
532 (APIC_BUS_CYCLE_NS * apic->divide_count));
Eddie Dong97222cc2007-09-12 10:58:04 +0300533
534 return tmcct;
535}
536
Avi Kivityb209749f2007-10-22 16:50:39 +0200537static void __report_tpr_access(struct kvm_lapic *apic, bool write)
538{
539 struct kvm_vcpu *vcpu = apic->vcpu;
540 struct kvm_run *run = vcpu->run;
541
Avi Kivitya8eeb042010-05-10 12:34:53 +0300542 kvm_make_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu);
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300543 run->tpr_access.rip = kvm_rip_read(vcpu);
Avi Kivityb209749f2007-10-22 16:50:39 +0200544 run->tpr_access.is_write = write;
545}
546
547static inline void report_tpr_access(struct kvm_lapic *apic, bool write)
548{
549 if (apic->vcpu->arch.tpr_access_reporting)
550 __report_tpr_access(apic, write);
551}
552
Eddie Dong97222cc2007-09-12 10:58:04 +0300553static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset)
554{
555 u32 val = 0;
556
557 if (offset >= LAPIC_MMIO_LENGTH)
558 return 0;
559
560 switch (offset) {
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300561 case APIC_ID:
562 if (apic_x2apic_mode(apic))
563 val = kvm_apic_id(apic);
564 else
565 val = kvm_apic_id(apic) << 24;
566 break;
Eddie Dong97222cc2007-09-12 10:58:04 +0300567 case APIC_ARBPRI:
568 printk(KERN_WARNING "Access APIC ARBPRI register "
569 "which is for P6\n");
570 break;
571
572 case APIC_TMCCT: /* Timer CCR */
573 val = apic_get_tmcct(apic);
574 break;
575
Avi Kivityb209749f2007-10-22 16:50:39 +0200576 case APIC_TASKPRI:
577 report_tpr_access(apic, false);
578 /* fall thru */
Eddie Dong97222cc2007-09-12 10:58:04 +0300579 default:
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800580 apic_update_ppr(apic);
Eddie Dong97222cc2007-09-12 10:58:04 +0300581 val = apic_get_reg(apic, offset);
582 break;
583 }
584
585 return val;
586}
587
Gregory Haskinsd76685c2009-06-01 12:54:50 -0400588static inline struct kvm_lapic *to_lapic(struct kvm_io_device *dev)
589{
590 return container_of(dev, struct kvm_lapic, dev);
591}
592
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300593static int apic_reg_read(struct kvm_lapic *apic, u32 offset, int len,
594 void *data)
Michael S. Tsirkinbda90202009-06-29 22:24:32 +0300595{
Eddie Dong97222cc2007-09-12 10:58:04 +0300596 unsigned char alignment = offset & 0xf;
597 u32 result;
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300598 /* this bitmask has a bit cleared for each reserver register */
599 static const u64 rmask = 0x43ff01ffffffe70cULL;
Eddie Dong97222cc2007-09-12 10:58:04 +0300600
601 if ((alignment + len) > 4) {
Gleb Natapov4088bb32009-07-08 11:26:54 +0300602 apic_debug("KVM_APIC_READ: alignment error %x %d\n",
603 offset, len);
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300604 return 1;
Eddie Dong97222cc2007-09-12 10:58:04 +0300605 }
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300606
607 if (offset > 0x3f0 || !(rmask & (1ULL << (offset >> 4)))) {
Gleb Natapov4088bb32009-07-08 11:26:54 +0300608 apic_debug("KVM_APIC_READ: read reserved register %x\n",
609 offset);
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300610 return 1;
611 }
612
Eddie Dong97222cc2007-09-12 10:58:04 +0300613 result = __apic_read(apic, offset & ~0xf);
614
Marcelo Tosatti229456f2009-06-17 09:22:14 -0300615 trace_kvm_apic_read(offset, result);
616
Eddie Dong97222cc2007-09-12 10:58:04 +0300617 switch (len) {
618 case 1:
619 case 2:
620 case 4:
621 memcpy(data, (char *)&result + alignment, len);
622 break;
623 default:
624 printk(KERN_ERR "Local APIC read with len = %x, "
625 "should be 1,2, or 4 instead\n", len);
626 break;
627 }
Michael S. Tsirkinbda90202009-06-29 22:24:32 +0300628 return 0;
Eddie Dong97222cc2007-09-12 10:58:04 +0300629}
630
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300631static int apic_mmio_in_range(struct kvm_lapic *apic, gpa_t addr)
632{
633 return apic_hw_enabled(apic) &&
634 addr >= apic->base_address &&
635 addr < apic->base_address + LAPIC_MMIO_LENGTH;
636}
637
638static int apic_mmio_read(struct kvm_io_device *this,
639 gpa_t address, int len, void *data)
640{
641 struct kvm_lapic *apic = to_lapic(this);
642 u32 offset = address - apic->base_address;
643
644 if (!apic_mmio_in_range(apic, address))
645 return -EOPNOTSUPP;
646
647 apic_reg_read(apic, offset, len, data);
648
649 return 0;
650}
651
Eddie Dong97222cc2007-09-12 10:58:04 +0300652static void update_divide_count(struct kvm_lapic *apic)
653{
654 u32 tmp1, tmp2, tdcr;
655
656 tdcr = apic_get_reg(apic, APIC_TDCR);
657 tmp1 = tdcr & 0xf;
658 tmp2 = ((tmp1 & 0x3) | ((tmp1 & 0x8) >> 1)) + 1;
Marcelo Tosattid3c7b772009-02-23 10:57:41 -0300659 apic->divide_count = 0x1 << (tmp2 & 0x7);
Eddie Dong97222cc2007-09-12 10:58:04 +0300660
661 apic_debug("timer divide count is 0x%x\n",
Glauber Costa9b5843d2009-04-29 17:29:09 -0400662 apic->divide_count);
Eddie Dong97222cc2007-09-12 10:58:04 +0300663}
664
665static void start_apic_timer(struct kvm_lapic *apic)
666{
Marcelo Tosattid3c7b772009-02-23 10:57:41 -0300667 ktime_t now = apic->lapic_timer.timer.base->get_time();
Eddie Dong97222cc2007-09-12 10:58:04 +0300668
Aurelien Jarnob2d83cf2009-09-25 11:09:37 +0200669 apic->lapic_timer.period = (u64)apic_get_reg(apic, APIC_TMICT) *
Marcelo Tosattid3c7b772009-02-23 10:57:41 -0300670 APIC_BUS_CYCLE_NS * apic->divide_count;
671 atomic_set(&apic->lapic_timer.pending, 0);
Avi Kivity0b975a32008-02-24 14:37:50 +0200672
Marcelo Tosattid3c7b772009-02-23 10:57:41 -0300673 if (!apic->lapic_timer.period)
Avi Kivity0b975a32008-02-24 14:37:50 +0200674 return;
Marcelo Tosatti14448852009-07-27 23:41:01 -0300675 /*
676 * Do not allow the guest to program periodic timers with small
677 * interval, since the hrtimers are not throttled by the host
678 * scheduler.
679 */
680 if (apic_lvtt_period(apic)) {
681 if (apic->lapic_timer.period < NSEC_PER_MSEC/2)
682 apic->lapic_timer.period = NSEC_PER_MSEC/2;
683 }
Avi Kivity0b975a32008-02-24 14:37:50 +0200684
Marcelo Tosattid3c7b772009-02-23 10:57:41 -0300685 hrtimer_start(&apic->lapic_timer.timer,
686 ktime_add_ns(now, apic->lapic_timer.period),
Eddie Dong97222cc2007-09-12 10:58:04 +0300687 HRTIMER_MODE_ABS);
688
689 apic_debug("%s: bus cycle is %" PRId64 "ns, now 0x%016"
690 PRIx64 ", "
691 "timer initial count 0x%x, period %lldns, "
Harvey Harrisonb8688d52008-03-03 12:59:56 -0800692 "expire @ 0x%016" PRIx64 ".\n", __func__,
Eddie Dong97222cc2007-09-12 10:58:04 +0300693 APIC_BUS_CYCLE_NS, ktime_to_ns(now),
694 apic_get_reg(apic, APIC_TMICT),
Marcelo Tosattid3c7b772009-02-23 10:57:41 -0300695 apic->lapic_timer.period,
Eddie Dong97222cc2007-09-12 10:58:04 +0300696 ktime_to_ns(ktime_add_ns(now,
Marcelo Tosattid3c7b772009-02-23 10:57:41 -0300697 apic->lapic_timer.period)));
Eddie Dong97222cc2007-09-12 10:58:04 +0300698}
699
Jan Kiszkacc6e4622008-10-20 10:20:03 +0200700static void apic_manage_nmi_watchdog(struct kvm_lapic *apic, u32 lvt0_val)
701{
702 int nmi_wd_enabled = apic_lvt_nmi_mode(apic_get_reg(apic, APIC_LVT0));
703
704 if (apic_lvt_nmi_mode(lvt0_val)) {
705 if (!nmi_wd_enabled) {
706 apic_debug("Receive NMI setting on APIC_LVT0 "
707 "for cpu %d\n", apic->vcpu->vcpu_id);
708 apic->vcpu->kvm->arch.vapics_in_nmi_mode++;
709 }
710 } else if (nmi_wd_enabled)
711 apic->vcpu->kvm->arch.vapics_in_nmi_mode--;
712}
713
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300714static int apic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val)
Eddie Dong97222cc2007-09-12 10:58:04 +0300715{
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300716 int ret = 0;
Eddie Dong97222cc2007-09-12 10:58:04 +0300717
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300718 trace_kvm_apic_write(reg, val);
Eddie Dong97222cc2007-09-12 10:58:04 +0300719
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300720 switch (reg) {
Eddie Dong97222cc2007-09-12 10:58:04 +0300721 case APIC_ID: /* Local APIC ID */
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300722 if (!apic_x2apic_mode(apic))
723 apic_set_reg(apic, APIC_ID, val);
724 else
725 ret = 1;
Eddie Dong97222cc2007-09-12 10:58:04 +0300726 break;
727
728 case APIC_TASKPRI:
Avi Kivityb209749f2007-10-22 16:50:39 +0200729 report_tpr_access(apic, true);
Eddie Dong97222cc2007-09-12 10:58:04 +0300730 apic_set_tpr(apic, val & 0xff);
731 break;
732
733 case APIC_EOI:
734 apic_set_eoi(apic);
735 break;
736
737 case APIC_LDR:
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300738 if (!apic_x2apic_mode(apic))
739 apic_set_reg(apic, APIC_LDR, val & APIC_LDR_MASK);
740 else
741 ret = 1;
Eddie Dong97222cc2007-09-12 10:58:04 +0300742 break;
743
744 case APIC_DFR:
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300745 if (!apic_x2apic_mode(apic))
746 apic_set_reg(apic, APIC_DFR, val | 0x0FFFFFFF);
747 else
748 ret = 1;
Eddie Dong97222cc2007-09-12 10:58:04 +0300749 break;
750
Gleb Natapovfc61b802009-07-05 17:39:35 +0300751 case APIC_SPIV: {
752 u32 mask = 0x3ff;
753 if (apic_get_reg(apic, APIC_LVR) & APIC_LVR_DIRECTED_EOI)
754 mask |= APIC_SPIV_DIRECTED_EOI;
755 apic_set_reg(apic, APIC_SPIV, val & mask);
Eddie Dong97222cc2007-09-12 10:58:04 +0300756 if (!(val & APIC_SPIV_APIC_ENABLED)) {
757 int i;
758 u32 lvt_val;
759
760 for (i = 0; i < APIC_LVT_NUM; i++) {
761 lvt_val = apic_get_reg(apic,
762 APIC_LVTT + 0x10 * i);
763 apic_set_reg(apic, APIC_LVTT + 0x10 * i,
764 lvt_val | APIC_LVT_MASKED);
765 }
Marcelo Tosattid3c7b772009-02-23 10:57:41 -0300766 atomic_set(&apic->lapic_timer.pending, 0);
Eddie Dong97222cc2007-09-12 10:58:04 +0300767
768 }
769 break;
Gleb Natapovfc61b802009-07-05 17:39:35 +0300770 }
Eddie Dong97222cc2007-09-12 10:58:04 +0300771 case APIC_ICR:
772 /* No delay here, so we always clear the pending bit */
773 apic_set_reg(apic, APIC_ICR, val & ~(1 << 12));
774 apic_send_ipi(apic);
775 break;
776
777 case APIC_ICR2:
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300778 if (!apic_x2apic_mode(apic))
779 val &= 0xff000000;
780 apic_set_reg(apic, APIC_ICR2, val);
Eddie Dong97222cc2007-09-12 10:58:04 +0300781 break;
782
Jan Kiszka23930f92008-09-26 09:30:52 +0200783 case APIC_LVT0:
Jan Kiszkacc6e4622008-10-20 10:20:03 +0200784 apic_manage_nmi_watchdog(apic, val);
Eddie Dong97222cc2007-09-12 10:58:04 +0300785 case APIC_LVTT:
786 case APIC_LVTTHMR:
787 case APIC_LVTPC:
Eddie Dong97222cc2007-09-12 10:58:04 +0300788 case APIC_LVT1:
789 case APIC_LVTERR:
790 /* TODO: Check vector */
791 if (!apic_sw_enabled(apic))
792 val |= APIC_LVT_MASKED;
793
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300794 val &= apic_lvt_mask[(reg - APIC_LVTT) >> 4];
795 apic_set_reg(apic, reg, val);
Eddie Dong97222cc2007-09-12 10:58:04 +0300796
797 break;
798
799 case APIC_TMICT:
Marcelo Tosattid3c7b772009-02-23 10:57:41 -0300800 hrtimer_cancel(&apic->lapic_timer.timer);
Eddie Dong97222cc2007-09-12 10:58:04 +0300801 apic_set_reg(apic, APIC_TMICT, val);
802 start_apic_timer(apic);
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300803 break;
Eddie Dong97222cc2007-09-12 10:58:04 +0300804
805 case APIC_TDCR:
806 if (val & 4)
807 printk(KERN_ERR "KVM_WRITE:TDCR %x\n", val);
808 apic_set_reg(apic, APIC_TDCR, val);
809 update_divide_count(apic);
810 break;
811
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300812 case APIC_ESR:
813 if (apic_x2apic_mode(apic) && val != 0) {
814 printk(KERN_ERR "KVM_WRITE:ESR not zero %x\n", val);
815 ret = 1;
816 }
817 break;
818
819 case APIC_SELF_IPI:
820 if (apic_x2apic_mode(apic)) {
821 apic_reg_write(apic, APIC_ICR, 0x40000 | (val & 0xff));
822 } else
823 ret = 1;
824 break;
Eddie Dong97222cc2007-09-12 10:58:04 +0300825 default:
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300826 ret = 1;
Eddie Dong97222cc2007-09-12 10:58:04 +0300827 break;
828 }
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300829 if (ret)
830 apic_debug("Local APIC Write to read-only register %x\n", reg);
831 return ret;
832}
833
834static int apic_mmio_write(struct kvm_io_device *this,
835 gpa_t address, int len, const void *data)
836{
837 struct kvm_lapic *apic = to_lapic(this);
838 unsigned int offset = address - apic->base_address;
839 u32 val;
840
841 if (!apic_mmio_in_range(apic, address))
842 return -EOPNOTSUPP;
843
844 /*
845 * APIC register must be aligned on 128-bits boundary.
846 * 32/64/128 bits registers must be accessed thru 32 bits.
847 * Refer SDM 8.4.1
848 */
849 if (len != 4 || (offset & 0xf)) {
850 /* Don't shout loud, $infamous_os would cause only noise. */
851 apic_debug("apic write: bad size=%d %lx\n", len, (long)address);
Sheng Yang756975b2009-07-06 11:05:39 +0800852 return 0;
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300853 }
854
855 val = *(u32*)data;
856
857 /* too common printing */
858 if (offset != APIC_EOI)
859 apic_debug("%s: offset 0x%x with length 0x%x, and value is "
860 "0x%x\n", __func__, offset, len, val);
861
862 apic_reg_write(apic, offset & 0xff0, val);
863
Michael S. Tsirkinbda90202009-06-29 22:24:32 +0300864 return 0;
Eddie Dong97222cc2007-09-12 10:58:04 +0300865}
866
Rusty Russelld5894442007-10-08 10:48:30 +1000867void kvm_free_lapic(struct kvm_vcpu *vcpu)
Eddie Dong97222cc2007-09-12 10:58:04 +0300868{
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800869 if (!vcpu->arch.apic)
Eddie Dong97222cc2007-09-12 10:58:04 +0300870 return;
871
Marcelo Tosattid3c7b772009-02-23 10:57:41 -0300872 hrtimer_cancel(&vcpu->arch.apic->lapic_timer.timer);
Eddie Dong97222cc2007-09-12 10:58:04 +0300873
Takuya Yoshikawaafc20182011-03-05 12:40:20 +0900874 if (vcpu->arch.apic->regs)
875 free_page((unsigned long)vcpu->arch.apic->regs);
Eddie Dong97222cc2007-09-12 10:58:04 +0300876
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800877 kfree(vcpu->arch.apic);
Eddie Dong97222cc2007-09-12 10:58:04 +0300878}
879
880/*
881 *----------------------------------------------------------------------
882 * LAPIC interface
883 *----------------------------------------------------------------------
884 */
885
886void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8)
887{
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800888 struct kvm_lapic *apic = vcpu->arch.apic;
Eddie Dong97222cc2007-09-12 10:58:04 +0300889
890 if (!apic)
891 return;
Avi Kivityb93463a2007-10-25 16:52:32 +0200892 apic_set_tpr(apic, ((cr8 & 0x0f) << 4)
893 | (apic_get_reg(apic, APIC_TASKPRI) & 4));
Eddie Dong97222cc2007-09-12 10:58:04 +0300894}
895
896u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu)
897{
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800898 struct kvm_lapic *apic = vcpu->arch.apic;
Eddie Dong97222cc2007-09-12 10:58:04 +0300899 u64 tpr;
900
901 if (!apic)
902 return 0;
903 tpr = (u64) apic_get_reg(apic, APIC_TASKPRI);
904
905 return (tpr & 0xf0) >> 4;
906}
907
908void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value)
909{
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800910 struct kvm_lapic *apic = vcpu->arch.apic;
Eddie Dong97222cc2007-09-12 10:58:04 +0300911
912 if (!apic) {
913 value |= MSR_IA32_APICBASE_BSP;
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800914 vcpu->arch.apic_base = value;
Eddie Dong97222cc2007-09-12 10:58:04 +0300915 return;
916 }
Gleb Natapovc5af89b2009-06-09 15:56:26 +0300917
918 if (!kvm_vcpu_is_bsp(apic->vcpu))
Eddie Dong97222cc2007-09-12 10:58:04 +0300919 value &= ~MSR_IA32_APICBASE_BSP;
920
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800921 vcpu->arch.apic_base = value;
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300922 if (apic_x2apic_mode(apic)) {
923 u32 id = kvm_apic_id(apic);
924 u32 ldr = ((id & ~0xf) << 16) | (1 << (id & 0xf));
925 apic_set_reg(apic, APIC_LDR, ldr);
926 }
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800927 apic->base_address = apic->vcpu->arch.apic_base &
Eddie Dong97222cc2007-09-12 10:58:04 +0300928 MSR_IA32_APICBASE_BASE;
929
930 /* with FSB delivery interrupt, we can restart APIC functionality */
931 apic_debug("apic base msr is 0x%016" PRIx64 ", and base address is "
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800932 "0x%lx.\n", apic->vcpu->arch.apic_base, apic->base_address);
Eddie Dong97222cc2007-09-12 10:58:04 +0300933
934}
935
He, Qingc5ec1532007-09-03 17:07:41 +0300936void kvm_lapic_reset(struct kvm_vcpu *vcpu)
Eddie Dong97222cc2007-09-12 10:58:04 +0300937{
938 struct kvm_lapic *apic;
939 int i;
940
Harvey Harrisonb8688d52008-03-03 12:59:56 -0800941 apic_debug("%s\n", __func__);
Eddie Dong97222cc2007-09-12 10:58:04 +0300942
943 ASSERT(vcpu);
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800944 apic = vcpu->arch.apic;
Eddie Dong97222cc2007-09-12 10:58:04 +0300945 ASSERT(apic != NULL);
946
947 /* Stop the timer in case it's a reset to an active apic */
Marcelo Tosattid3c7b772009-02-23 10:57:41 -0300948 hrtimer_cancel(&apic->lapic_timer.timer);
Eddie Dong97222cc2007-09-12 10:58:04 +0300949
950 apic_set_reg(apic, APIC_ID, vcpu->vcpu_id << 24);
Gleb Natapovfc61b802009-07-05 17:39:35 +0300951 kvm_apic_set_version(apic->vcpu);
Eddie Dong97222cc2007-09-12 10:58:04 +0300952
953 for (i = 0; i < APIC_LVT_NUM; i++)
954 apic_set_reg(apic, APIC_LVTT + 0x10 * i, APIC_LVT_MASKED);
Qing He40487c62007-09-17 14:47:13 +0800955 apic_set_reg(apic, APIC_LVT0,
956 SET_APIC_DELIVERY_MODE(0, APIC_MODE_EXTINT));
Eddie Dong97222cc2007-09-12 10:58:04 +0300957
958 apic_set_reg(apic, APIC_DFR, 0xffffffffU);
959 apic_set_reg(apic, APIC_SPIV, 0xff);
960 apic_set_reg(apic, APIC_TASKPRI, 0);
961 apic_set_reg(apic, APIC_LDR, 0);
962 apic_set_reg(apic, APIC_ESR, 0);
963 apic_set_reg(apic, APIC_ICR, 0);
964 apic_set_reg(apic, APIC_ICR2, 0);
965 apic_set_reg(apic, APIC_TDCR, 0);
966 apic_set_reg(apic, APIC_TMICT, 0);
967 for (i = 0; i < 8; i++) {
968 apic_set_reg(apic, APIC_IRR + 0x10 * i, 0);
969 apic_set_reg(apic, APIC_ISR + 0x10 * i, 0);
970 apic_set_reg(apic, APIC_TMR + 0x10 * i, 0);
971 }
Gleb Natapov33e4c682009-06-11 11:06:51 +0300972 apic->irr_pending = false;
Kevin Pedrettib33ac882007-10-21 08:54:53 +0200973 update_divide_count(apic);
Marcelo Tosattid3c7b772009-02-23 10:57:41 -0300974 atomic_set(&apic->lapic_timer.pending, 0);
Gleb Natapovc5af89b2009-06-09 15:56:26 +0300975 if (kvm_vcpu_is_bsp(vcpu))
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800976 vcpu->arch.apic_base |= MSR_IA32_APICBASE_BSP;
Eddie Dong97222cc2007-09-12 10:58:04 +0300977 apic_update_ppr(apic);
978
Gleb Natapove1035712009-03-05 16:34:59 +0200979 vcpu->arch.apic_arb_prio = 0;
980
Eddie Dong97222cc2007-09-12 10:58:04 +0300981 apic_debug(KERN_INFO "%s: vcpu=%p, id=%d, base_msr="
Harvey Harrisonb8688d52008-03-03 12:59:56 -0800982 "0x%016" PRIx64 ", base_address=0x%0lx.\n", __func__,
Eddie Dong97222cc2007-09-12 10:58:04 +0300983 vcpu, kvm_apic_id(apic),
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800984 vcpu->arch.apic_base, apic->base_address);
Eddie Dong97222cc2007-09-12 10:58:04 +0300985}
986
Gleb Natapov343f94f2009-03-05 16:34:54 +0200987bool kvm_apic_present(struct kvm_vcpu *vcpu)
988{
989 return vcpu->arch.apic && apic_hw_enabled(vcpu->arch.apic);
990}
991
Eddie Dong97222cc2007-09-12 10:58:04 +0300992int kvm_lapic_enabled(struct kvm_vcpu *vcpu)
993{
Gleb Natapov343f94f2009-03-05 16:34:54 +0200994 return kvm_apic_present(vcpu) && apic_sw_enabled(vcpu->arch.apic);
Eddie Dong97222cc2007-09-12 10:58:04 +0300995}
996
997/*
998 *----------------------------------------------------------------------
999 * timer interface
1000 *----------------------------------------------------------------------
1001 */
Eddie Dong1b9778d2007-09-03 16:56:58 +03001002
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001003static bool lapic_is_periodic(struct kvm_timer *ktimer)
Eddie Dong97222cc2007-09-12 10:58:04 +03001004{
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001005 struct kvm_lapic *apic = container_of(ktimer, struct kvm_lapic,
1006 lapic_timer);
1007 return apic_lvtt_period(apic);
Eddie Dong97222cc2007-09-12 10:58:04 +03001008}
1009
Marcelo Tosatti3d808402008-04-11 14:53:26 -03001010int apic_has_pending_timer(struct kvm_vcpu *vcpu)
1011{
1012 struct kvm_lapic *lapic = vcpu->arch.apic;
1013
Marcelo Tosatti54aaace2008-05-14 02:29:06 -03001014 if (lapic && apic_enabled(lapic) && apic_lvt_enabled(lapic, APIC_LVTT))
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001015 return atomic_read(&lapic->lapic_timer.pending);
Marcelo Tosatti3d808402008-04-11 14:53:26 -03001016
1017 return 0;
1018}
1019
Jan Kiszka8fdb2352008-10-20 10:20:02 +02001020static int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type)
Eddie Dong1b9778d2007-09-03 16:56:58 +03001021{
Jan Kiszka8fdb2352008-10-20 10:20:02 +02001022 u32 reg = apic_get_reg(apic, lvt_type);
Jan Kiszka23930f92008-09-26 09:30:52 +02001023 int vector, mode, trig_mode;
Eddie Dong1b9778d2007-09-03 16:56:58 +03001024
Jan Kiszka8fdb2352008-10-20 10:20:02 +02001025 if (apic_hw_enabled(apic) && !(reg & APIC_LVT_MASKED)) {
Jan Kiszka23930f92008-09-26 09:30:52 +02001026 vector = reg & APIC_VECTOR_MASK;
1027 mode = reg & APIC_MODE_MASK;
1028 trig_mode = reg & APIC_LVT_LEVEL_TRIGGER;
1029 return __apic_accept_irq(apic, mode, vector, 1, trig_mode);
1030 }
1031 return 0;
1032}
1033
Jan Kiszka8fdb2352008-10-20 10:20:02 +02001034void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu)
Jan Kiszka23930f92008-09-26 09:30:52 +02001035{
Jan Kiszka8fdb2352008-10-20 10:20:02 +02001036 struct kvm_lapic *apic = vcpu->arch.apic;
1037
1038 if (apic)
1039 kvm_apic_local_deliver(apic, APIC_LVT0);
Eddie Dong1b9778d2007-09-03 16:56:58 +03001040}
1041
Hannes Eder386eb6e2009-03-10 22:51:09 +01001042static struct kvm_timer_ops lapic_timer_ops = {
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001043 .is_periodic = lapic_is_periodic,
1044};
Eddie Dong97222cc2007-09-12 10:58:04 +03001045
Gregory Haskinsd76685c2009-06-01 12:54:50 -04001046static const struct kvm_io_device_ops apic_mmio_ops = {
1047 .read = apic_mmio_read,
1048 .write = apic_mmio_write,
Gregory Haskinsd76685c2009-06-01 12:54:50 -04001049};
1050
Eddie Dong97222cc2007-09-12 10:58:04 +03001051int kvm_create_lapic(struct kvm_vcpu *vcpu)
1052{
1053 struct kvm_lapic *apic;
1054
1055 ASSERT(vcpu != NULL);
1056 apic_debug("apic_init %d\n", vcpu->vcpu_id);
1057
1058 apic = kzalloc(sizeof(*apic), GFP_KERNEL);
1059 if (!apic)
1060 goto nomem;
1061
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001062 vcpu->arch.apic = apic;
Eddie Dong97222cc2007-09-12 10:58:04 +03001063
Takuya Yoshikawaafc20182011-03-05 12:40:20 +09001064 apic->regs = (void *)get_zeroed_page(GFP_KERNEL);
1065 if (!apic->regs) {
Eddie Dong97222cc2007-09-12 10:58:04 +03001066 printk(KERN_ERR "malloc apic regs error for vcpu %x\n",
1067 vcpu->vcpu_id);
Rusty Russelld5894442007-10-08 10:48:30 +10001068 goto nomem_free_apic;
Eddie Dong97222cc2007-09-12 10:58:04 +03001069 }
Eddie Dong97222cc2007-09-12 10:58:04 +03001070 apic->vcpu = vcpu;
1071
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001072 hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC,
1073 HRTIMER_MODE_ABS);
1074 apic->lapic_timer.timer.function = kvm_timer_fn;
1075 apic->lapic_timer.t_ops = &lapic_timer_ops;
1076 apic->lapic_timer.kvm = vcpu->kvm;
Gleb Natapov1ed0ce02009-06-09 15:56:27 +03001077 apic->lapic_timer.vcpu = vcpu;
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001078
Eddie Dong97222cc2007-09-12 10:58:04 +03001079 apic->base_address = APIC_DEFAULT_PHYS_BASE;
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001080 vcpu->arch.apic_base = APIC_DEFAULT_PHYS_BASE;
Eddie Dong97222cc2007-09-12 10:58:04 +03001081
He, Qingc5ec1532007-09-03 17:07:41 +03001082 kvm_lapic_reset(vcpu);
Gregory Haskinsd76685c2009-06-01 12:54:50 -04001083 kvm_iodevice_init(&apic->dev, &apic_mmio_ops);
Eddie Dong97222cc2007-09-12 10:58:04 +03001084
1085 return 0;
Rusty Russelld5894442007-10-08 10:48:30 +10001086nomem_free_apic:
1087 kfree(apic);
Eddie Dong97222cc2007-09-12 10:58:04 +03001088nomem:
Eddie Dong97222cc2007-09-12 10:58:04 +03001089 return -ENOMEM;
1090}
Eddie Dong97222cc2007-09-12 10:58:04 +03001091
1092int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu)
1093{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001094 struct kvm_lapic *apic = vcpu->arch.apic;
Eddie Dong97222cc2007-09-12 10:58:04 +03001095 int highest_irr;
1096
1097 if (!apic || !apic_enabled(apic))
1098 return -1;
1099
Yang, Sheng6e5d8652007-09-12 18:03:11 +08001100 apic_update_ppr(apic);
Eddie Dong97222cc2007-09-12 10:58:04 +03001101 highest_irr = apic_find_highest_irr(apic);
1102 if ((highest_irr == -1) ||
1103 ((highest_irr & 0xF0) <= apic_get_reg(apic, APIC_PROCPRI)))
1104 return -1;
1105 return highest_irr;
1106}
1107
Qing He40487c62007-09-17 14:47:13 +08001108int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu)
1109{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001110 u32 lvt0 = apic_get_reg(vcpu->arch.apic, APIC_LVT0);
Qing He40487c62007-09-17 14:47:13 +08001111 int r = 0;
1112
Chris Lalancettee7dca5c2010-06-16 17:11:12 -04001113 if (!apic_hw_enabled(vcpu->arch.apic))
1114 r = 1;
1115 if ((lvt0 & APIC_LVT_MASKED) == 0 &&
1116 GET_APIC_DELIVERY_MODE(lvt0) == APIC_MODE_EXTINT)
1117 r = 1;
Qing He40487c62007-09-17 14:47:13 +08001118 return r;
1119}
1120
Eddie Dong1b9778d2007-09-03 16:56:58 +03001121void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu)
1122{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001123 struct kvm_lapic *apic = vcpu->arch.apic;
Eddie Dong1b9778d2007-09-03 16:56:58 +03001124
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001125 if (apic && atomic_read(&apic->lapic_timer.pending) > 0) {
Jan Kiszka8fdb2352008-10-20 10:20:02 +02001126 if (kvm_apic_local_deliver(apic, APIC_LVTT))
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001127 atomic_dec(&apic->lapic_timer.pending);
Eddie Dong1b9778d2007-09-03 16:56:58 +03001128 }
1129}
1130
Eddie Dong97222cc2007-09-12 10:58:04 +03001131int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu)
1132{
1133 int vector = kvm_apic_has_interrupt(vcpu);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001134 struct kvm_lapic *apic = vcpu->arch.apic;
Eddie Dong97222cc2007-09-12 10:58:04 +03001135
1136 if (vector == -1)
1137 return -1;
1138
1139 apic_set_vector(vector, apic->regs + APIC_ISR);
1140 apic_update_ppr(apic);
1141 apic_clear_irr(vector, apic);
1142 return vector;
1143}
Eddie Dong96ad2cc2007-09-06 12:22:56 +03001144
1145void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu)
1146{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001147 struct kvm_lapic *apic = vcpu->arch.apic;
Eddie Dong96ad2cc2007-09-06 12:22:56 +03001148
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001149 apic->base_address = vcpu->arch.apic_base &
Eddie Dong96ad2cc2007-09-06 12:22:56 +03001150 MSR_IA32_APICBASE_BASE;
Gleb Natapovfc61b802009-07-05 17:39:35 +03001151 kvm_apic_set_version(vcpu);
1152
Eddie Dong96ad2cc2007-09-06 12:22:56 +03001153 apic_update_ppr(apic);
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001154 hrtimer_cancel(&apic->lapic_timer.timer);
Eddie Dong96ad2cc2007-09-06 12:22:56 +03001155 update_divide_count(apic);
1156 start_apic_timer(apic);
Marcelo Tosatti6e24a6e2009-12-14 17:37:35 -02001157 apic->irr_pending = true;
Avi Kivity3842d132010-07-27 12:30:24 +03001158 kvm_make_request(KVM_REQ_EVENT, vcpu);
Eddie Dong96ad2cc2007-09-06 12:22:56 +03001159}
Eddie Donga3d7f852007-09-03 16:15:12 +03001160
Avi Kivity2f52d582008-01-16 12:49:30 +02001161void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu)
Eddie Donga3d7f852007-09-03 16:15:12 +03001162{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001163 struct kvm_lapic *apic = vcpu->arch.apic;
Eddie Donga3d7f852007-09-03 16:15:12 +03001164 struct hrtimer *timer;
1165
1166 if (!apic)
1167 return;
1168
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001169 timer = &apic->lapic_timer.timer;
Eddie Donga3d7f852007-09-03 16:15:12 +03001170 if (hrtimer_cancel(timer))
Arjan van de Venbeb20d522008-09-01 14:55:57 -07001171 hrtimer_start_expires(timer, HRTIMER_MODE_ABS);
Eddie Donga3d7f852007-09-03 16:15:12 +03001172}
Avi Kivityb93463a2007-10-25 16:52:32 +02001173
1174void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu)
1175{
1176 u32 data;
1177 void *vapic;
1178
1179 if (!irqchip_in_kernel(vcpu->kvm) || !vcpu->arch.apic->vapic_addr)
1180 return;
1181
1182 vapic = kmap_atomic(vcpu->arch.apic->vapic_page, KM_USER0);
1183 data = *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr));
1184 kunmap_atomic(vapic, KM_USER0);
1185
1186 apic_set_tpr(vcpu->arch.apic, data & 0xff);
1187}
1188
1189void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu)
1190{
1191 u32 data, tpr;
1192 int max_irr, max_isr;
1193 struct kvm_lapic *apic;
1194 void *vapic;
1195
1196 if (!irqchip_in_kernel(vcpu->kvm) || !vcpu->arch.apic->vapic_addr)
1197 return;
1198
1199 apic = vcpu->arch.apic;
1200 tpr = apic_get_reg(apic, APIC_TASKPRI) & 0xff;
1201 max_irr = apic_find_highest_irr(apic);
1202 if (max_irr < 0)
1203 max_irr = 0;
1204 max_isr = apic_find_highest_isr(apic);
1205 if (max_isr < 0)
1206 max_isr = 0;
1207 data = (tpr & 0xff) | ((max_isr & 0xf0) << 8) | (max_irr << 24);
1208
1209 vapic = kmap_atomic(vcpu->arch.apic->vapic_page, KM_USER0);
1210 *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr)) = data;
1211 kunmap_atomic(vapic, KM_USER0);
1212}
1213
1214void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr)
1215{
1216 if (!irqchip_in_kernel(vcpu->kvm))
1217 return;
1218
1219 vcpu->arch.apic->vapic_addr = vapic_addr;
1220}
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001221
1222int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1223{
1224 struct kvm_lapic *apic = vcpu->arch.apic;
1225 u32 reg = (msr - APIC_BASE_MSR) << 4;
1226
1227 if (!irqchip_in_kernel(vcpu->kvm) || !apic_x2apic_mode(apic))
1228 return 1;
1229
1230 /* if this is ICR write vector before command */
1231 if (msr == 0x830)
1232 apic_reg_write(apic, APIC_ICR2, (u32)(data >> 32));
1233 return apic_reg_write(apic, reg, (u32)data);
1234}
1235
1236int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data)
1237{
1238 struct kvm_lapic *apic = vcpu->arch.apic;
1239 u32 reg = (msr - APIC_BASE_MSR) << 4, low, high = 0;
1240
1241 if (!irqchip_in_kernel(vcpu->kvm) || !apic_x2apic_mode(apic))
1242 return 1;
1243
1244 if (apic_reg_read(apic, reg, 4, &low))
1245 return 1;
1246 if (msr == 0x830)
1247 apic_reg_read(apic, APIC_ICR2, 4, &high);
1248
1249 *data = (((u64)high) << 32) | low;
1250
1251 return 0;
1252}
Gleb Natapov10388a02010-01-17 15:51:23 +02001253
1254int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 reg, u64 data)
1255{
1256 struct kvm_lapic *apic = vcpu->arch.apic;
1257
1258 if (!irqchip_in_kernel(vcpu->kvm))
1259 return 1;
1260
1261 /* if this is ICR write vector before command */
1262 if (reg == APIC_ICR)
1263 apic_reg_write(apic, APIC_ICR2, (u32)(data >> 32));
1264 return apic_reg_write(apic, reg, (u32)data);
1265}
1266
1267int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 reg, u64 *data)
1268{
1269 struct kvm_lapic *apic = vcpu->arch.apic;
1270 u32 low, high = 0;
1271
1272 if (!irqchip_in_kernel(vcpu->kvm))
1273 return 1;
1274
1275 if (apic_reg_read(apic, reg, 4, &low))
1276 return 1;
1277 if (reg == APIC_ICR)
1278 apic_reg_read(apic, APIC_ICR2, 4, &high);
1279
1280 *data = (((u64)high) << 32) | low;
1281
1282 return 0;
1283}