blob: 3ebef53d20a0059c6698ed0ec144fa5ba15fae01 [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>
Paul Gortmaker1767e932016-07-13 20:19:00 -040028#include <linux/export.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>
Marcelo Tosattid0659d92014-12-16 09:08:15 -050036#include <asm/delay.h>
Arun Sharma600634972011-07-26 16:09:06 -070037#include <linux/atomic.h>
Gleb Natapovc5cc4212012-08-05 15:58:30 +030038#include <linux/jump_label.h>
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -030039#include "kvm_cache_regs.h"
Eddie Dong97222cc2007-09-12 10:58:04 +030040#include "irq.h"
Marcelo Tosatti229456f2009-06-17 09:22:14 -030041#include "trace.h"
Gleb Natapovfc61b802009-07-05 17:39:35 +030042#include "x86.h"
Avi Kivity00b27a32011-11-23 16:30:32 +020043#include "cpuid.h"
Andrey Smetanin5c9194122015-11-10 15:36:34 +030044#include "hyperv.h"
Eddie Dong97222cc2007-09-12 10:58:04 +030045
Marcelo Tosattib682b812009-02-10 20:41:41 -020046#ifndef CONFIG_X86_64
47#define mod_64(x, y) ((x) - (y) * div64_u64(x, y))
48#else
49#define mod_64(x, y) ((x) % (y))
50#endif
51
Eddie Dong97222cc2007-09-12 10:58:04 +030052#define PRId64 "d"
53#define PRIx64 "llx"
54#define PRIu64 "u"
55#define PRIo64 "o"
56
57#define APIC_BUS_CYCLE_NS 1
58
59/* #define apic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg) */
60#define apic_debug(fmt, arg...)
61
Eddie Dong97222cc2007-09-12 10:58:04 +030062/* 14 is the version for Xeon and Pentium 8.4.8*/
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -050063#define APIC_VERSION (0x14UL | ((KVM_APIC_LVT_NUM - 1) << 16))
Eddie Dong97222cc2007-09-12 10:58:04 +030064#define LAPIC_MMIO_LENGTH (1 << 12)
65/* followed define is not in apicdef.h */
66#define APIC_SHORT_MASK 0xc0000
67#define APIC_DEST_NOSHORT 0x0
68#define APIC_DEST_MASK 0x800
69#define MAX_APIC_VECTOR 256
Takuya Yoshikawaecba9a52012-09-05 19:30:01 +090070#define APIC_VECTORS_PER_REG 32
Eddie Dong97222cc2007-09-12 10:58:04 +030071
Nadav Amit394457a2014-10-03 00:30:52 +030072#define APIC_BROADCAST 0xFF
73#define X2APIC_BROADCAST 0xFFFFFFFFul
74
Michael S. Tsirkina0c9a8222012-04-11 18:49:55 +030075static inline int apic_test_vector(int vec, void *bitmap)
76{
77 return test_bit(VEC_POS(vec), (bitmap) + REG_POS(vec));
78}
79
Yang Zhang10606912013-04-11 19:21:38 +080080bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector)
81{
82 struct kvm_lapic *apic = vcpu->arch.apic;
83
84 return apic_test_vector(vector, apic->regs + APIC_ISR) ||
85 apic_test_vector(vector, apic->regs + APIC_IRR);
86}
87
Eddie Dong97222cc2007-09-12 10:58:04 +030088static inline void apic_clear_vector(int vec, void *bitmap)
89{
90 clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec));
91}
92
Michael S. Tsirkin8680b942012-06-24 19:24:26 +030093static inline int __apic_test_and_set_vector(int vec, void *bitmap)
94{
95 return __test_and_set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec));
96}
97
98static inline int __apic_test_and_clear_vector(int vec, void *bitmap)
99{
100 return __test_and_clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec));
101}
102
Gleb Natapovc5cc4212012-08-05 15:58:30 +0300103struct static_key_deferred apic_hw_disabled __read_mostly;
Gleb Natapovf8c1ea12012-08-05 15:58:31 +0300104struct static_key_deferred apic_sw_disabled __read_mostly;
105
Eddie Dong97222cc2007-09-12 10:58:04 +0300106static inline int apic_enabled(struct kvm_lapic *apic)
107{
Gleb Natapovc48f1492012-08-05 15:58:33 +0300108 return kvm_apic_sw_enabled(apic) && kvm_apic_hw_enabled(apic);
Gleb Natapov54e98182012-08-05 15:58:32 +0300109}
110
Eddie Dong97222cc2007-09-12 10:58:04 +0300111#define LVT_MASK \
112 (APIC_LVT_MASKED | APIC_SEND_PENDING | APIC_VECTOR_MASK)
113
114#define LINT_MASK \
115 (LVT_MASK | APIC_MODE_MASK | APIC_INPUT_POLARITY | \
116 APIC_LVT_REMOTE_IRR | APIC_LVT_LEVEL_TRIGGER)
117
Radim Krčmář6e500432016-12-15 18:06:46 +0100118static inline u8 kvm_xapic_id(struct kvm_lapic *apic)
119{
120 return kvm_lapic_get_reg(apic, APIC_ID) >> 24;
121}
122
123static inline u32 kvm_x2apic_id(struct kvm_lapic *apic)
124{
125 return apic->vcpu->vcpu_id;
126}
127
Radim Krčmáře45115b2016-07-12 22:09:19 +0200128static inline bool kvm_apic_map_get_logical_dest(struct kvm_apic_map *map,
129 u32 dest_id, struct kvm_lapic ***cluster, u16 *mask) {
130 switch (map->mode) {
131 case KVM_APIC_MODE_X2APIC: {
132 u32 offset = (dest_id >> 16) * 16;
Radim Krčmář0ca52e72016-07-12 22:09:20 +0200133 u32 max_apic_id = map->max_apic_id;
Radim Krčmář3548a252015-02-12 19:41:33 +0100134
Radim Krčmáře45115b2016-07-12 22:09:19 +0200135 if (offset <= max_apic_id) {
136 u8 cluster_size = min(max_apic_id - offset + 1, 16U);
Radim Krčmář3b5a5ff2015-02-12 19:41:34 +0100137
Radim Krčmáře45115b2016-07-12 22:09:19 +0200138 *cluster = &map->phys_map[offset];
139 *mask = dest_id & (0xffff >> (16 - cluster_size));
140 } else {
141 *mask = 0;
142 }
Radim Krčmář3b5a5ff2015-02-12 19:41:34 +0100143
Radim Krčmáře45115b2016-07-12 22:09:19 +0200144 return true;
145 }
146 case KVM_APIC_MODE_XAPIC_FLAT:
147 *cluster = map->xapic_flat_map;
148 *mask = dest_id & 0xff;
149 return true;
150 case KVM_APIC_MODE_XAPIC_CLUSTER:
Radim Krčmář444fdad2016-11-22 20:20:14 +0100151 *cluster = map->xapic_cluster_map[(dest_id >> 4) & 0xf];
Radim Krčmáře45115b2016-07-12 22:09:19 +0200152 *mask = dest_id & 0xf;
153 return true;
154 default:
155 /* Not optimized. */
156 return false;
157 }
Eddie Dong97222cc2007-09-12 10:58:04 +0300158}
159
Radim Krčmářaf1bae52016-07-12 22:09:30 +0200160static void kvm_apic_map_free(struct rcu_head *rcu)
Radim Krčmář3b5a5ff2015-02-12 19:41:34 +0100161{
Radim Krčmářaf1bae52016-07-12 22:09:30 +0200162 struct kvm_apic_map *map = container_of(rcu, struct kvm_apic_map, rcu);
Radim Krčmář3b5a5ff2015-02-12 19:41:34 +0100163
Radim Krčmářaf1bae52016-07-12 22:09:30 +0200164 kvfree(map);
Radim Krčmář3b5a5ff2015-02-12 19:41:34 +0100165}
166
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300167static void recalculate_apic_map(struct kvm *kvm)
168{
169 struct kvm_apic_map *new, *old = NULL;
170 struct kvm_vcpu *vcpu;
171 int i;
Radim Krčmář6e500432016-12-15 18:06:46 +0100172 u32 max_id = 255; /* enough space for any xAPIC ID */
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300173
174 mutex_lock(&kvm->arch.apic_map_lock);
175
Radim Krčmář0ca52e72016-07-12 22:09:20 +0200176 kvm_for_each_vcpu(i, vcpu, kvm)
177 if (kvm_apic_present(vcpu))
Radim Krčmář6e500432016-12-15 18:06:46 +0100178 max_id = max(max_id, kvm_x2apic_id(vcpu->arch.apic));
Radim Krčmář0ca52e72016-07-12 22:09:20 +0200179
Radim Krčmářaf1bae52016-07-12 22:09:30 +0200180 new = kvm_kvzalloc(sizeof(struct kvm_apic_map) +
181 sizeof(struct kvm_lapic *) * ((u64)max_id + 1));
Radim Krčmář0ca52e72016-07-12 22:09:20 +0200182
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300183 if (!new)
184 goto out;
185
Radim Krčmář0ca52e72016-07-12 22:09:20 +0200186 new->max_apic_id = max_id;
187
Nadav Amit173beed2014-11-02 11:54:54 +0200188 kvm_for_each_vcpu(i, vcpu, kvm) {
189 struct kvm_lapic *apic = vcpu->arch.apic;
Radim Krčmáře45115b2016-07-12 22:09:19 +0200190 struct kvm_lapic **cluster;
191 u16 mask;
Radim Krčmář25995e52014-11-27 23:30:19 +0100192 u32 ldr, aid;
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300193
Radim Krčmářdf04d1d2015-01-29 22:33:35 +0100194 if (!kvm_apic_present(vcpu))
195 continue;
196
Radim Krčmář6e500432016-12-15 18:06:46 +0100197 aid = apic_x2apic_mode(apic) ? kvm_x2apic_id(apic)
198 : kvm_xapic_id(apic);
Radim Krčmář0ca52e72016-07-12 22:09:20 +0200199 if (aid <= new->max_apic_id)
Radim Krčmář25995e52014-11-27 23:30:19 +0100200 new->phys_map[aid] = apic;
Radim Krčmář3548a252015-02-12 19:41:33 +0100201
Radim Krčmář6e500432016-12-15 18:06:46 +0100202 ldr = kvm_lapic_get_reg(apic, APIC_LDR);
203
Radim Krčmář3b5a5ff2015-02-12 19:41:34 +0100204 if (apic_x2apic_mode(apic)) {
205 new->mode |= KVM_APIC_MODE_X2APIC;
206 } else if (ldr) {
207 ldr = GET_APIC_LOGICAL_ID(ldr);
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -0500208 if (kvm_lapic_get_reg(apic, APIC_DFR) == APIC_DFR_FLAT)
Radim Krčmář3b5a5ff2015-02-12 19:41:34 +0100209 new->mode |= KVM_APIC_MODE_XAPIC_FLAT;
210 else
211 new->mode |= KVM_APIC_MODE_XAPIC_CLUSTER;
212 }
213
Radim Krčmáře45115b2016-07-12 22:09:19 +0200214 if (!kvm_apic_map_get_logical_dest(new, ldr, &cluster, &mask))
Radim Krčmář3548a252015-02-12 19:41:33 +0100215 continue;
216
Radim Krčmáře45115b2016-07-12 22:09:19 +0200217 if (mask)
218 cluster[ffs(mask) - 1] = apic;
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300219 }
220out:
221 old = rcu_dereference_protected(kvm->arch.apic_map,
222 lockdep_is_held(&kvm->arch.apic_map_lock));
223 rcu_assign_pointer(kvm->arch.apic_map, new);
224 mutex_unlock(&kvm->arch.apic_map_lock);
225
226 if (old)
Radim Krčmářaf1bae52016-07-12 22:09:30 +0200227 call_rcu(&old->rcu, kvm_apic_map_free);
Yang Zhangc7c9c562013-01-25 10:18:51 +0800228
Steve Rutherfordb053b2a2015-07-29 23:32:35 -0700229 kvm_make_scan_ioapic_request(kvm);
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300230}
231
Nadav Amit1e1b6c22014-08-19 00:03:00 +0300232static inline void apic_set_spiv(struct kvm_lapic *apic, u32 val)
233{
Radim Krčmáře4627552014-10-30 15:06:45 +0100234 bool enabled = val & APIC_SPIV_APIC_ENABLED;
Nadav Amit1e1b6c22014-08-19 00:03:00 +0300235
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -0500236 kvm_lapic_set_reg(apic, APIC_SPIV, val);
Radim Krčmáře4627552014-10-30 15:06:45 +0100237
238 if (enabled != apic->sw_enabled) {
239 apic->sw_enabled = enabled;
240 if (enabled) {
Nadav Amit1e1b6c22014-08-19 00:03:00 +0300241 static_key_slow_dec_deferred(&apic_sw_disabled);
242 recalculate_apic_map(apic->vcpu->kvm);
243 } else
244 static_key_slow_inc(&apic_sw_disabled.key);
245 }
246}
247
Radim Krčmářa92e2542016-07-12 22:09:22 +0200248static inline void kvm_apic_set_xapic_id(struct kvm_lapic *apic, u8 id)
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300249{
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -0500250 kvm_lapic_set_reg(apic, APIC_ID, id << 24);
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300251 recalculate_apic_map(apic->vcpu->kvm);
252}
253
254static inline void kvm_apic_set_ldr(struct kvm_lapic *apic, u32 id)
255{
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -0500256 kvm_lapic_set_reg(apic, APIC_LDR, id);
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300257 recalculate_apic_map(apic->vcpu->kvm);
258}
259
Radim Krčmářa92e2542016-07-12 22:09:22 +0200260static inline void kvm_apic_set_x2apic_id(struct kvm_lapic *apic, u32 id)
Radim Krčmář257b9a52015-05-22 18:45:11 +0200261{
262 u32 ldr = ((id >> 4) << 16) | (1 << (id & 0xf));
263
Radim Krčmář6e500432016-12-15 18:06:46 +0100264 WARN_ON_ONCE(id != apic->vcpu->vcpu_id);
265
Radim Krčmářa92e2542016-07-12 22:09:22 +0200266 kvm_lapic_set_reg(apic, APIC_ID, id);
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -0500267 kvm_lapic_set_reg(apic, APIC_LDR, ldr);
Radim Krčmář257b9a52015-05-22 18:45:11 +0200268 recalculate_apic_map(apic->vcpu->kvm);
269}
270
Eddie Dong97222cc2007-09-12 10:58:04 +0300271static inline int apic_lvt_enabled(struct kvm_lapic *apic, int lvt_type)
272{
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -0500273 return !(kvm_lapic_get_reg(apic, lvt_type) & APIC_LVT_MASKED);
Eddie Dong97222cc2007-09-12 10:58:04 +0300274}
275
276static inline int apic_lvt_vector(struct kvm_lapic *apic, int lvt_type)
277{
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -0500278 return kvm_lapic_get_reg(apic, lvt_type) & APIC_VECTOR_MASK;
Eddie Dong97222cc2007-09-12 10:58:04 +0300279}
280
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +0800281static inline int apic_lvtt_oneshot(struct kvm_lapic *apic)
282{
Radim Krčmářf30ebc32014-10-30 15:06:47 +0100283 return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_ONESHOT;
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +0800284}
285
Eddie Dong97222cc2007-09-12 10:58:04 +0300286static inline int apic_lvtt_period(struct kvm_lapic *apic)
287{
Radim Krčmářf30ebc32014-10-30 15:06:47 +0100288 return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_PERIODIC;
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +0800289}
290
291static inline int apic_lvtt_tscdeadline(struct kvm_lapic *apic)
292{
Radim Krčmářf30ebc32014-10-30 15:06:47 +0100293 return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_TSCDEADLINE;
Eddie Dong97222cc2007-09-12 10:58:04 +0300294}
295
Jan Kiszkacc6e4622008-10-20 10:20:03 +0200296static inline int apic_lvt_nmi_mode(u32 lvt_val)
297{
298 return (lvt_val & (APIC_MODE_MASK | APIC_LVT_MASKED)) == APIC_DM_NMI;
299}
300
Gleb Natapovfc61b802009-07-05 17:39:35 +0300301void kvm_apic_set_version(struct kvm_vcpu *vcpu)
302{
303 struct kvm_lapic *apic = vcpu->arch.apic;
304 struct kvm_cpuid_entry2 *feat;
305 u32 v = APIC_VERSION;
306
Paolo Bonzinibce87cc2016-01-08 13:48:51 +0100307 if (!lapic_in_kernel(vcpu))
Gleb Natapovfc61b802009-07-05 17:39:35 +0300308 return;
309
310 feat = kvm_find_cpuid_entry(apic->vcpu, 0x1, 0);
311 if (feat && (feat->ecx & (1 << (X86_FEATURE_X2APIC & 31))))
312 v |= APIC_LVR_DIRECTED_EOI;
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -0500313 kvm_lapic_set_reg(apic, APIC_LVR, v);
Gleb Natapovfc61b802009-07-05 17:39:35 +0300314}
315
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -0500316static const unsigned int apic_lvt_mask[KVM_APIC_LVT_NUM] = {
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +0800317 LVT_MASK , /* part LVTT mask, timer mode mask added at runtime */
Eddie Dong97222cc2007-09-12 10:58:04 +0300318 LVT_MASK | APIC_MODE_MASK, /* LVTTHMR */
319 LVT_MASK | APIC_MODE_MASK, /* LVTPC */
320 LINT_MASK, LINT_MASK, /* LVT0-1 */
321 LVT_MASK /* LVTERR */
322};
323
324static int find_highest_vector(void *bitmap)
325{
Takuya Yoshikawaecba9a52012-09-05 19:30:01 +0900326 int vec;
327 u32 *reg;
Eddie Dong97222cc2007-09-12 10:58:04 +0300328
Takuya Yoshikawaecba9a52012-09-05 19:30:01 +0900329 for (vec = MAX_APIC_VECTOR - APIC_VECTORS_PER_REG;
330 vec >= 0; vec -= APIC_VECTORS_PER_REG) {
331 reg = bitmap + REG_POS(vec);
332 if (*reg)
333 return fls(*reg) - 1 + vec;
334 }
Eddie Dong97222cc2007-09-12 10:58:04 +0300335
Takuya Yoshikawaecba9a52012-09-05 19:30:01 +0900336 return -1;
Eddie Dong97222cc2007-09-12 10:58:04 +0300337}
338
Michael S. Tsirkin8680b942012-06-24 19:24:26 +0300339static u8 count_vectors(void *bitmap)
340{
Takuya Yoshikawaecba9a52012-09-05 19:30:01 +0900341 int vec;
342 u32 *reg;
Michael S. Tsirkin8680b942012-06-24 19:24:26 +0300343 u8 count = 0;
Takuya Yoshikawaecba9a52012-09-05 19:30:01 +0900344
345 for (vec = 0; vec < MAX_APIC_VECTOR; vec += APIC_VECTORS_PER_REG) {
346 reg = bitmap + REG_POS(vec);
347 count += hweight32(*reg);
348 }
349
Michael S. Tsirkin8680b942012-06-24 19:24:26 +0300350 return count;
351}
352
Wincy Van705699a2015-02-03 23:58:17 +0800353void __kvm_apic_update_irr(u32 *pir, void *regs)
Yang Zhanga20ed542013-04-11 19:25:15 +0800354{
355 u32 i, pir_val;
Yang Zhanga20ed542013-04-11 19:25:15 +0800356
357 for (i = 0; i <= 7; i++) {
Paolo Bonziniad361092016-09-20 16:15:05 +0200358 pir_val = READ_ONCE(pir[i]);
359 if (pir_val) {
360 pir_val = xchg(&pir[i], 0);
Wincy Van705699a2015-02-03 23:58:17 +0800361 *((u32 *)(regs + APIC_IRR + i * 0x10)) |= pir_val;
Paolo Bonziniad361092016-09-20 16:15:05 +0200362 }
Yang Zhanga20ed542013-04-11 19:25:15 +0800363 }
364}
Wincy Van705699a2015-02-03 23:58:17 +0800365EXPORT_SYMBOL_GPL(__kvm_apic_update_irr);
366
367void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir)
368{
369 struct kvm_lapic *apic = vcpu->arch.apic;
370
371 __kvm_apic_update_irr(pir, apic->regs);
Radim Krčmářc77f3fa2015-10-08 20:23:33 +0200372
373 kvm_make_request(KVM_REQ_EVENT, vcpu);
Wincy Van705699a2015-02-03 23:58:17 +0800374}
Yang Zhanga20ed542013-04-11 19:25:15 +0800375EXPORT_SYMBOL_GPL(kvm_apic_update_irr);
376
Gleb Natapov33e4c682009-06-11 11:06:51 +0300377static inline int apic_search_irr(struct kvm_lapic *apic)
Eddie Dong97222cc2007-09-12 10:58:04 +0300378{
Gleb Natapov33e4c682009-06-11 11:06:51 +0300379 return find_highest_vector(apic->regs + APIC_IRR);
Eddie Dong97222cc2007-09-12 10:58:04 +0300380}
381
382static inline int apic_find_highest_irr(struct kvm_lapic *apic)
383{
384 int result;
385
Yang Zhangc7c9c562013-01-25 10:18:51 +0800386 /*
387 * Note that irr_pending is just a hint. It will be always
388 * true with virtual interrupt delivery enabled.
389 */
Gleb Natapov33e4c682009-06-11 11:06:51 +0300390 if (!apic->irr_pending)
391 return -1;
392
Andrey Smetanind62caab2015-11-10 15:36:33 +0300393 if (apic->vcpu->arch.apicv_active)
394 kvm_x86_ops->sync_pir_to_irr(apic->vcpu);
Gleb Natapov33e4c682009-06-11 11:06:51 +0300395 result = apic_search_irr(apic);
Eddie Dong97222cc2007-09-12 10:58:04 +0300396 ASSERT(result == -1 || result >= 16);
397
398 return result;
399}
400
Gleb Natapov33e4c682009-06-11 11:06:51 +0300401static inline void apic_clear_irr(int vec, struct kvm_lapic *apic)
402{
Wanpeng Li56cc2402014-08-05 12:42:24 +0800403 struct kvm_vcpu *vcpu;
404
405 vcpu = apic->vcpu;
406
Andrey Smetanind62caab2015-11-10 15:36:33 +0300407 if (unlikely(vcpu->arch.apicv_active)) {
Wanpeng Li56cc2402014-08-05 12:42:24 +0800408 /* try to update RVI */
Nadav Amitf210f752014-11-16 23:49:07 +0200409 apic_clear_vector(vec, apic->regs + APIC_IRR);
Wanpeng Li56cc2402014-08-05 12:42:24 +0800410 kvm_make_request(KVM_REQ_EVENT, vcpu);
Nadav Amitf210f752014-11-16 23:49:07 +0200411 } else {
412 apic->irr_pending = false;
413 apic_clear_vector(vec, apic->regs + APIC_IRR);
414 if (apic_search_irr(apic) != -1)
415 apic->irr_pending = true;
Wanpeng Li56cc2402014-08-05 12:42:24 +0800416 }
Gleb Natapov33e4c682009-06-11 11:06:51 +0300417}
418
Michael S. Tsirkin8680b942012-06-24 19:24:26 +0300419static inline void apic_set_isr(int vec, struct kvm_lapic *apic)
420{
Wanpeng Li56cc2402014-08-05 12:42:24 +0800421 struct kvm_vcpu *vcpu;
Paolo Bonzinifc57ac22014-05-14 17:40:58 +0200422
Wanpeng Li56cc2402014-08-05 12:42:24 +0800423 if (__apic_test_and_set_vector(vec, apic->regs + APIC_ISR))
424 return;
425
426 vcpu = apic->vcpu;
427
Michael S. Tsirkin8680b942012-06-24 19:24:26 +0300428 /*
Wanpeng Li56cc2402014-08-05 12:42:24 +0800429 * With APIC virtualization enabled, all caching is disabled
430 * because the processor can modify ISR under the hood. Instead
431 * just set SVI.
Michael S. Tsirkin8680b942012-06-24 19:24:26 +0300432 */
Andrey Smetanind62caab2015-11-10 15:36:33 +0300433 if (unlikely(vcpu->arch.apicv_active))
Paolo Bonzini67c9ddd2016-05-10 17:01:23 +0200434 kvm_x86_ops->hwapic_isr_update(vcpu, vec);
Wanpeng Li56cc2402014-08-05 12:42:24 +0800435 else {
436 ++apic->isr_count;
437 BUG_ON(apic->isr_count > MAX_APIC_VECTOR);
438 /*
439 * ISR (in service register) bit is set when injecting an interrupt.
440 * The highest vector is injected. Thus the latest bit set matches
441 * the highest bit in ISR.
442 */
443 apic->highest_isr_cache = vec;
444 }
Michael S. Tsirkin8680b942012-06-24 19:24:26 +0300445}
446
Paolo Bonzinifc57ac22014-05-14 17:40:58 +0200447static inline int apic_find_highest_isr(struct kvm_lapic *apic)
448{
449 int result;
450
451 /*
452 * Note that isr_count is always 1, and highest_isr_cache
453 * is always -1, with APIC virtualization enabled.
454 */
455 if (!apic->isr_count)
456 return -1;
457 if (likely(apic->highest_isr_cache != -1))
458 return apic->highest_isr_cache;
459
460 result = find_highest_vector(apic->regs + APIC_ISR);
461 ASSERT(result == -1 || result >= 16);
462
463 return result;
464}
465
Michael S. Tsirkin8680b942012-06-24 19:24:26 +0300466static inline void apic_clear_isr(int vec, struct kvm_lapic *apic)
467{
Paolo Bonzinifc57ac22014-05-14 17:40:58 +0200468 struct kvm_vcpu *vcpu;
469 if (!__apic_test_and_clear_vector(vec, apic->regs + APIC_ISR))
470 return;
471
472 vcpu = apic->vcpu;
473
474 /*
475 * We do get here for APIC virtualization enabled if the guest
476 * uses the Hyper-V APIC enlightenment. In this case we may need
477 * to trigger a new interrupt delivery by writing the SVI field;
478 * on the other hand isr_count and highest_isr_cache are unused
479 * and must be left alone.
480 */
Andrey Smetanind62caab2015-11-10 15:36:33 +0300481 if (unlikely(vcpu->arch.apicv_active))
Paolo Bonzini67c9ddd2016-05-10 17:01:23 +0200482 kvm_x86_ops->hwapic_isr_update(vcpu,
Paolo Bonzinifc57ac22014-05-14 17:40:58 +0200483 apic_find_highest_isr(apic));
484 else {
Michael S. Tsirkin8680b942012-06-24 19:24:26 +0300485 --apic->isr_count;
Paolo Bonzinifc57ac22014-05-14 17:40:58 +0200486 BUG_ON(apic->isr_count < 0);
487 apic->highest_isr_cache = -1;
488 }
Michael S. Tsirkin8680b942012-06-24 19:24:26 +0300489}
490
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800491int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu)
492{
Gleb Natapov33e4c682009-06-11 11:06:51 +0300493 /* This may race with setting of irr in __apic_accept_irq() and
494 * value returned may be wrong, but kvm_vcpu_kick() in __apic_accept_irq
495 * will cause vmexit immediately and the value will be recalculated
496 * on the next vmentry.
497 */
Paolo Bonzinif8543d62016-01-08 13:42:24 +0100498 return apic_find_highest_irr(vcpu->arch.apic);
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800499}
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800500
Gleb Natapov6da7e3f2009-03-05 16:34:44 +0200501static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
Yang Zhangb4f22252013-04-11 19:21:37 +0800502 int vector, int level, int trig_mode,
Joerg Roedel9e4aabe2016-02-29 16:04:43 +0100503 struct dest_map *dest_map);
Gleb Natapov6da7e3f2009-03-05 16:34:44 +0200504
Yang Zhangb4f22252013-04-11 19:21:37 +0800505int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,
Joerg Roedel9e4aabe2016-02-29 16:04:43 +0100506 struct dest_map *dest_map)
Eddie Dong97222cc2007-09-12 10:58:04 +0300507{
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800508 struct kvm_lapic *apic = vcpu->arch.apic;
Zhang Xiantao8be54532007-12-02 22:35:57 +0800509
Gleb Natapov58c2dde2009-03-05 16:35:04 +0200510 return __apic_accept_irq(apic, irq->delivery_mode, irq->vector,
Yang Zhangb4f22252013-04-11 19:21:37 +0800511 irq->level, irq->trig_mode, dest_map);
Eddie Dong97222cc2007-09-12 10:58:04 +0300512}
513
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +0300514static int pv_eoi_put_user(struct kvm_vcpu *vcpu, u8 val)
515{
516
517 return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.pv_eoi.data, &val,
518 sizeof(val));
519}
520
521static int pv_eoi_get_user(struct kvm_vcpu *vcpu, u8 *val)
522{
523
524 return kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.pv_eoi.data, val,
525 sizeof(*val));
526}
527
528static inline bool pv_eoi_enabled(struct kvm_vcpu *vcpu)
529{
530 return vcpu->arch.pv_eoi.msr_val & KVM_MSR_ENABLED;
531}
532
533static bool pv_eoi_get_pending(struct kvm_vcpu *vcpu)
534{
535 u8 val;
536 if (pv_eoi_get_user(vcpu, &val) < 0)
537 apic_debug("Can't read EOI MSR value: 0x%llx\n",
Chen Fan96893972014-01-02 17:14:11 +0800538 (unsigned long long)vcpu->arch.pv_eoi.msr_val);
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +0300539 return val & 0x1;
540}
541
542static void pv_eoi_set_pending(struct kvm_vcpu *vcpu)
543{
544 if (pv_eoi_put_user(vcpu, KVM_PV_EOI_ENABLED) < 0) {
545 apic_debug("Can't set EOI MSR value: 0x%llx\n",
Chen Fan96893972014-01-02 17:14:11 +0800546 (unsigned long long)vcpu->arch.pv_eoi.msr_val);
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +0300547 return;
548 }
549 __set_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention);
550}
551
552static void pv_eoi_clr_pending(struct kvm_vcpu *vcpu)
553{
554 if (pv_eoi_put_user(vcpu, KVM_PV_EOI_DISABLED) < 0) {
555 apic_debug("Can't clear EOI MSR value: 0x%llx\n",
Chen Fan96893972014-01-02 17:14:11 +0800556 (unsigned long long)vcpu->arch.pv_eoi.msr_val);
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +0300557 return;
558 }
559 __clear_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention);
560}
561
Eddie Dong97222cc2007-09-12 10:58:04 +0300562static void apic_update_ppr(struct kvm_lapic *apic)
563{
Avi Kivity3842d132010-07-27 12:30:24 +0300564 u32 tpr, isrv, ppr, old_ppr;
Eddie Dong97222cc2007-09-12 10:58:04 +0300565 int isr;
566
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -0500567 old_ppr = kvm_lapic_get_reg(apic, APIC_PROCPRI);
568 tpr = kvm_lapic_get_reg(apic, APIC_TASKPRI);
Eddie Dong97222cc2007-09-12 10:58:04 +0300569 isr = apic_find_highest_isr(apic);
570 isrv = (isr != -1) ? isr : 0;
571
572 if ((tpr & 0xf0) >= (isrv & 0xf0))
573 ppr = tpr & 0xff;
574 else
575 ppr = isrv & 0xf0;
576
577 apic_debug("vlapic %p, ppr 0x%x, isr 0x%x, isrv 0x%x",
578 apic, ppr, isr, isrv);
579
Avi Kivity3842d132010-07-27 12:30:24 +0300580 if (old_ppr != ppr) {
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -0500581 kvm_lapic_set_reg(apic, APIC_PROCPRI, ppr);
Avi Kivity83bcacb2010-10-25 15:23:55 +0200582 if (ppr < old_ppr)
583 kvm_make_request(KVM_REQ_EVENT, apic->vcpu);
Avi Kivity3842d132010-07-27 12:30:24 +0300584 }
Eddie Dong97222cc2007-09-12 10:58:04 +0300585}
586
587static void apic_set_tpr(struct kvm_lapic *apic, u32 tpr)
588{
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -0500589 kvm_lapic_set_reg(apic, APIC_TASKPRI, tpr);
Eddie Dong97222cc2007-09-12 10:58:04 +0300590 apic_update_ppr(apic);
591}
592
Radim Krčmář03d22492015-02-12 19:41:31 +0100593static bool kvm_apic_broadcast(struct kvm_lapic *apic, u32 mda)
Eddie Dong97222cc2007-09-12 10:58:04 +0300594{
Radim Krčmářb4535b52016-12-15 18:06:47 +0100595 return mda == (apic_x2apic_mode(apic) ?
596 X2APIC_BROADCAST : APIC_BROADCAST);
Eddie Dong97222cc2007-09-12 10:58:04 +0300597}
598
Radim Krčmář03d22492015-02-12 19:41:31 +0100599static bool kvm_apic_match_physical_addr(struct kvm_lapic *apic, u32 mda)
Nadav Amit394457a2014-10-03 00:30:52 +0300600{
Radim Krčmář03d22492015-02-12 19:41:31 +0100601 if (kvm_apic_broadcast(apic, mda))
602 return true;
603
604 if (apic_x2apic_mode(apic))
Radim Krčmář6e500432016-12-15 18:06:46 +0100605 return mda == kvm_x2apic_id(apic);
Radim Krčmář03d22492015-02-12 19:41:31 +0100606
Radim Krčmářb4535b52016-12-15 18:06:47 +0100607 return mda == kvm_xapic_id(apic);
Nadav Amit394457a2014-10-03 00:30:52 +0300608}
609
Radim Krčmář52c233a2015-01-29 22:48:48 +0100610static bool kvm_apic_match_logical_addr(struct kvm_lapic *apic, u32 mda)
Eddie Dong97222cc2007-09-12 10:58:04 +0300611{
Gleb Natapov0105d1a2009-07-05 17:39:36 +0300612 u32 logical_id;
613
Nadav Amit394457a2014-10-03 00:30:52 +0300614 if (kvm_apic_broadcast(apic, mda))
Radim Krčmář9368b562015-01-29 22:48:49 +0100615 return true;
Nadav Amit394457a2014-10-03 00:30:52 +0300616
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -0500617 logical_id = kvm_lapic_get_reg(apic, APIC_LDR);
Eddie Dong97222cc2007-09-12 10:58:04 +0300618
Radim Krčmář9368b562015-01-29 22:48:49 +0100619 if (apic_x2apic_mode(apic))
Radim Krčmář8a395362015-01-29 22:48:51 +0100620 return ((logical_id >> 16) == (mda >> 16))
621 && (logical_id & mda & 0xffff) != 0;
Radim Krčmář9368b562015-01-29 22:48:49 +0100622
623 logical_id = GET_APIC_LOGICAL_ID(logical_id);
Eddie Dong97222cc2007-09-12 10:58:04 +0300624
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -0500625 switch (kvm_lapic_get_reg(apic, APIC_DFR)) {
Eddie Dong97222cc2007-09-12 10:58:04 +0300626 case APIC_DFR_FLAT:
Radim Krčmář9368b562015-01-29 22:48:49 +0100627 return (logical_id & mda) != 0;
Eddie Dong97222cc2007-09-12 10:58:04 +0300628 case APIC_DFR_CLUSTER:
Radim Krčmář9368b562015-01-29 22:48:49 +0100629 return ((logical_id >> 4) == (mda >> 4))
630 && (logical_id & mda & 0xf) != 0;
Eddie Dong97222cc2007-09-12 10:58:04 +0300631 default:
Jan Kiszka7712de82011-09-12 11:25:51 +0200632 apic_debug("Bad DFR vcpu %d: %08x\n",
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -0500633 apic->vcpu->vcpu_id, kvm_lapic_get_reg(apic, APIC_DFR));
Radim Krčmář9368b562015-01-29 22:48:49 +0100634 return false;
Eddie Dong97222cc2007-09-12 10:58:04 +0300635 }
Eddie Dong97222cc2007-09-12 10:58:04 +0300636}
637
Radim Krčmářc5192652016-07-12 22:09:28 +0200638/* The KVM local APIC implementation has two quirks:
639 *
Radim Krčmářb4535b52016-12-15 18:06:47 +0100640 * - Real hardware delivers interrupts destined to x2APIC ID > 0xff to LAPICs
641 * in xAPIC mode if the "destination & 0xff" matches its xAPIC ID.
642 * KVM doesn't do that aliasing.
Radim Krčmářc5192652016-07-12 22:09:28 +0200643 *
644 * - in-kernel IOAPIC messages have to be delivered directly to
645 * x2APIC, because the kernel does not support interrupt remapping.
646 * In order to support broadcast without interrupt remapping, x2APIC
647 * rewrites the destination of non-IPI messages from APIC_BROADCAST
648 * to X2APIC_BROADCAST.
649 *
650 * The broadcast quirk can be disabled with KVM_CAP_X2APIC_API. This is
651 * important when userspace wants to use x2APIC-format MSIs, because
652 * APIC_BROADCAST (0xff) is a legal route for "cluster 0, CPUs 0-7".
Radim Krčmář03d22492015-02-12 19:41:31 +0100653 */
Radim Krčmářc5192652016-07-12 22:09:28 +0200654static u32 kvm_apic_mda(struct kvm_vcpu *vcpu, unsigned int dest_id,
655 struct kvm_lapic *source, struct kvm_lapic *target)
Radim Krčmář03d22492015-02-12 19:41:31 +0100656{
657 bool ipi = source != NULL;
Radim Krčmář03d22492015-02-12 19:41:31 +0100658
Radim Krčmářc5192652016-07-12 22:09:28 +0200659 if (!vcpu->kvm->arch.x2apic_broadcast_quirk_disabled &&
Radim Krčmářb4535b52016-12-15 18:06:47 +0100660 !ipi && dest_id == APIC_BROADCAST && apic_x2apic_mode(target))
Radim Krčmář03d22492015-02-12 19:41:31 +0100661 return X2APIC_BROADCAST;
662
Radim Krčmářb4535b52016-12-15 18:06:47 +0100663 return dest_id;
Radim Krčmář03d22492015-02-12 19:41:31 +0100664}
665
Radim Krčmář52c233a2015-01-29 22:48:48 +0100666bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
Nadav Amit394457a2014-10-03 00:30:52 +0300667 int short_hand, unsigned int dest, int dest_mode)
Eddie Dong97222cc2007-09-12 10:58:04 +0300668{
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800669 struct kvm_lapic *target = vcpu->arch.apic;
Radim Krčmářc5192652016-07-12 22:09:28 +0200670 u32 mda = kvm_apic_mda(vcpu, dest, source, target);
Eddie Dong97222cc2007-09-12 10:58:04 +0300671
672 apic_debug("target %p, source %p, dest 0x%x, "
Gleb Natapov343f94f2009-03-05 16:34:54 +0200673 "dest_mode 0x%x, short_hand 0x%x\n",
Eddie Dong97222cc2007-09-12 10:58:04 +0300674 target, source, dest, dest_mode, short_hand);
675
Zachary Amsdenbd371392010-06-14 11:42:15 -1000676 ASSERT(target);
Eddie Dong97222cc2007-09-12 10:58:04 +0300677 switch (short_hand) {
678 case APIC_DEST_NOSHORT:
Radim Krčmář3697f302015-01-29 22:48:50 +0100679 if (dest_mode == APIC_DEST_PHYSICAL)
Radim Krčmář03d22492015-02-12 19:41:31 +0100680 return kvm_apic_match_physical_addr(target, mda);
Gleb Natapov343f94f2009-03-05 16:34:54 +0200681 else
Radim Krčmář03d22492015-02-12 19:41:31 +0100682 return kvm_apic_match_logical_addr(target, mda);
Eddie Dong97222cc2007-09-12 10:58:04 +0300683 case APIC_DEST_SELF:
Radim Krčmář9368b562015-01-29 22:48:49 +0100684 return target == source;
Eddie Dong97222cc2007-09-12 10:58:04 +0300685 case APIC_DEST_ALLINC:
Radim Krčmář9368b562015-01-29 22:48:49 +0100686 return true;
Eddie Dong97222cc2007-09-12 10:58:04 +0300687 case APIC_DEST_ALLBUT:
Radim Krčmář9368b562015-01-29 22:48:49 +0100688 return target != source;
Eddie Dong97222cc2007-09-12 10:58:04 +0300689 default:
Jan Kiszka7712de82011-09-12 11:25:51 +0200690 apic_debug("kvm: apic: Bad dest shorthand value %x\n",
691 short_hand);
Radim Krčmář9368b562015-01-29 22:48:49 +0100692 return false;
Eddie Dong97222cc2007-09-12 10:58:04 +0300693 }
Eddie Dong97222cc2007-09-12 10:58:04 +0300694}
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -0500695EXPORT_SYMBOL_GPL(kvm_apic_match_dest);
Eddie Dong97222cc2007-09-12 10:58:04 +0300696
Feng Wu520040142016-01-25 16:53:33 +0800697int kvm_vector_to_index(u32 vector, u32 dest_vcpus,
698 const unsigned long *bitmap, u32 bitmap_size)
699{
700 u32 mod;
701 int i, idx = -1;
702
703 mod = vector % dest_vcpus;
704
705 for (i = 0; i <= mod; i++) {
706 idx = find_next_bit(bitmap, bitmap_size, idx + 1);
707 BUG_ON(idx == bitmap_size);
708 }
709
710 return idx;
711}
712
Radim Krčmář4efd8052016-02-12 15:00:15 +0100713static void kvm_apic_disabled_lapic_found(struct kvm *kvm)
714{
715 if (!kvm->arch.disabled_lapic_found) {
716 kvm->arch.disabled_lapic_found = true;
717 printk(KERN_INFO
718 "Disabled LAPIC found during irq injection\n");
719 }
720}
721
Radim Krčmářc5192652016-07-12 22:09:28 +0200722static bool kvm_apic_is_broadcast_dest(struct kvm *kvm, struct kvm_lapic **src,
723 struct kvm_lapic_irq *irq, struct kvm_apic_map *map)
724{
725 if (kvm->arch.x2apic_broadcast_quirk_disabled) {
726 if ((irq->dest_id == APIC_BROADCAST &&
727 map->mode != KVM_APIC_MODE_X2APIC))
728 return true;
729 if (irq->dest_id == X2APIC_BROADCAST)
730 return true;
731 } else {
732 bool x2apic_ipi = src && *src && apic_x2apic_mode(*src);
733 if (irq->dest_id == (x2apic_ipi ?
734 X2APIC_BROADCAST : APIC_BROADCAST))
735 return true;
736 }
737
738 return false;
739}
740
Radim Krčmář64aa47b2016-07-12 22:09:18 +0200741/* Return true if the interrupt can be handled by using *bitmap as index mask
742 * for valid destinations in *dst array.
743 * Return false if kvm_apic_map_get_dest_lapic did nothing useful.
744 * Note: we may have zero kvm_lapic destinations when we return true, which
745 * means that the interrupt should be dropped. In this case, *bitmap would be
746 * zero and *dst undefined.
747 */
748static inline bool kvm_apic_map_get_dest_lapic(struct kvm *kvm,
749 struct kvm_lapic **src, struct kvm_lapic_irq *irq,
750 struct kvm_apic_map *map, struct kvm_lapic ***dst,
751 unsigned long *bitmap)
752{
753 int i, lowest;
Radim Krčmář64aa47b2016-07-12 22:09:18 +0200754
755 if (irq->shorthand == APIC_DEST_SELF && src) {
756 *dst = src;
757 *bitmap = 1;
758 return true;
759 } else if (irq->shorthand)
760 return false;
761
Radim Krčmářc5192652016-07-12 22:09:28 +0200762 if (!map || kvm_apic_is_broadcast_dest(kvm, src, irq, map))
Radim Krčmář64aa47b2016-07-12 22:09:18 +0200763 return false;
764
765 if (irq->dest_mode == APIC_DEST_PHYSICAL) {
Radim Krčmář0ca52e72016-07-12 22:09:20 +0200766 if (irq->dest_id > map->max_apic_id) {
Radim Krčmář64aa47b2016-07-12 22:09:18 +0200767 *bitmap = 0;
768 } else {
769 *dst = &map->phys_map[irq->dest_id];
770 *bitmap = 1;
771 }
772 return true;
773 }
774
Radim Krčmáře45115b2016-07-12 22:09:19 +0200775 *bitmap = 0;
776 if (!kvm_apic_map_get_logical_dest(map, irq->dest_id, dst,
777 (u16 *)bitmap))
Radim Krčmář64aa47b2016-07-12 22:09:18 +0200778 return false;
779
Radim Krčmář64aa47b2016-07-12 22:09:18 +0200780 if (!kvm_lowest_prio_delivery(irq))
781 return true;
782
783 if (!kvm_vector_hashing_enabled()) {
784 lowest = -1;
785 for_each_set_bit(i, bitmap, 16) {
786 if (!(*dst)[i])
787 continue;
788 if (lowest < 0)
789 lowest = i;
790 else if (kvm_apic_compare_prio((*dst)[i]->vcpu,
791 (*dst)[lowest]->vcpu) < 0)
792 lowest = i;
793 }
794 } else {
795 if (!*bitmap)
796 return true;
797
798 lowest = kvm_vector_to_index(irq->vector, hweight16(*bitmap),
799 bitmap, 16);
800
801 if (!(*dst)[lowest]) {
802 kvm_apic_disabled_lapic_found(kvm);
803 *bitmap = 0;
804 return true;
805 }
806 }
807
808 *bitmap = (lowest >= 0) ? 1 << lowest : 0;
809
810 return true;
811}
812
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300813bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
Joerg Roedel9e4aabe2016-02-29 16:04:43 +0100814 struct kvm_lapic_irq *irq, int *r, struct dest_map *dest_map)
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300815{
816 struct kvm_apic_map *map;
Radim Krčmář64aa47b2016-07-12 22:09:18 +0200817 unsigned long bitmap;
818 struct kvm_lapic **dst = NULL;
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300819 int i;
Radim Krčmář64aa47b2016-07-12 22:09:18 +0200820 bool ret;
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300821
822 *r = -1;
823
824 if (irq->shorthand == APIC_DEST_SELF) {
Yang Zhangb4f22252013-04-11 19:21:37 +0800825 *r = kvm_apic_set_irq(src->vcpu, irq, dest_map);
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300826 return true;
827 }
828
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300829 rcu_read_lock();
830 map = rcu_dereference(kvm->arch.apic_map);
831
Radim Krčmář64aa47b2016-07-12 22:09:18 +0200832 ret = kvm_apic_map_get_dest_lapic(kvm, &src, irq, map, &dst, &bitmap);
833 if (ret)
834 for_each_set_bit(i, &bitmap, 16) {
835 if (!dst[i])
836 continue;
837 if (*r < 0)
838 *r = 0;
839 *r += kvm_apic_set_irq(dst[i]->vcpu, irq, dest_map);
Radim Krčmář3548a252015-02-12 19:41:33 +0100840 }
841
Gleb Natapov1e08ec42012-09-13 17:19:24 +0300842 rcu_read_unlock();
843 return ret;
844}
845
Feng Wu6228a0d2016-01-25 16:53:34 +0800846/*
847 * This routine tries to handler interrupts in posted mode, here is how
848 * it deals with different cases:
849 * - For single-destination interrupts, handle it in posted mode
850 * - Else if vector hashing is enabled and it is a lowest-priority
851 * interrupt, handle it in posted mode and use the following mechanism
852 * to find the destinaiton vCPU.
853 * 1. For lowest-priority interrupts, store all the possible
854 * destination vCPUs in an array.
855 * 2. Use "guest vector % max number of destination vCPUs" to find
856 * the right destination vCPU in the array for the lowest-priority
857 * interrupt.
858 * - Otherwise, use remapped mode to inject the interrupt.
859 */
Feng Wu8feb4a02015-09-18 22:29:47 +0800860bool kvm_intr_is_single_vcpu_fast(struct kvm *kvm, struct kvm_lapic_irq *irq,
861 struct kvm_vcpu **dest_vcpu)
862{
863 struct kvm_apic_map *map;
Radim Krčmář64aa47b2016-07-12 22:09:18 +0200864 unsigned long bitmap;
865 struct kvm_lapic **dst = NULL;
Feng Wu8feb4a02015-09-18 22:29:47 +0800866 bool ret = false;
Feng Wu8feb4a02015-09-18 22:29:47 +0800867
868 if (irq->shorthand)
869 return false;
870
871 rcu_read_lock();
872 map = rcu_dereference(kvm->arch.apic_map);
873
Radim Krčmář64aa47b2016-07-12 22:09:18 +0200874 if (kvm_apic_map_get_dest_lapic(kvm, NULL, irq, map, &dst, &bitmap) &&
875 hweight16(bitmap) == 1) {
876 unsigned long i = find_first_bit(&bitmap, 16);
Feng Wu8feb4a02015-09-18 22:29:47 +0800877
Radim Krčmář64aa47b2016-07-12 22:09:18 +0200878 if (dst[i]) {
879 *dest_vcpu = dst[i]->vcpu;
880 ret = true;
Feng Wu8feb4a02015-09-18 22:29:47 +0800881 }
Feng Wu8feb4a02015-09-18 22:29:47 +0800882 }
883
Feng Wu8feb4a02015-09-18 22:29:47 +0800884 rcu_read_unlock();
885 return ret;
886}
887
Eddie Dong97222cc2007-09-12 10:58:04 +0300888/*
889 * Add a pending IRQ into lapic.
890 * Return 1 if successfully added and 0 if discarded.
891 */
892static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
Yang Zhangb4f22252013-04-11 19:21:37 +0800893 int vector, int level, int trig_mode,
Joerg Roedel9e4aabe2016-02-29 16:04:43 +0100894 struct dest_map *dest_map)
Eddie Dong97222cc2007-09-12 10:58:04 +0300895{
Gleb Natapov6da7e3f2009-03-05 16:34:44 +0200896 int result = 0;
He, Qingc5ec1532007-09-03 17:07:41 +0300897 struct kvm_vcpu *vcpu = apic->vcpu;
Eddie Dong97222cc2007-09-12 10:58:04 +0300898
Paolo Bonzinia183b632014-09-11 11:51:02 +0200899 trace_kvm_apic_accept_irq(vcpu->vcpu_id, delivery_mode,
900 trig_mode, vector);
Eddie Dong97222cc2007-09-12 10:58:04 +0300901 switch (delivery_mode) {
Eddie Dong97222cc2007-09-12 10:58:04 +0300902 case APIC_DM_LOWEST:
Gleb Natapove1035712009-03-05 16:34:59 +0200903 vcpu->arch.apic_arb_prio++;
904 case APIC_DM_FIXED:
Paolo Bonzinibdaffe12015-07-29 15:03:06 +0200905 if (unlikely(trig_mode && !level))
906 break;
907
Eddie Dong97222cc2007-09-12 10:58:04 +0300908 /* FIXME add logic for vcpu on reset */
909 if (unlikely(!apic_enabled(apic)))
910 break;
911
Jan Kiszka11f5cc02013-07-25 09:58:45 +0200912 result = 1;
913
Joerg Roedel9daa5002016-02-29 16:04:44 +0100914 if (dest_map) {
Joerg Roedel9e4aabe2016-02-29 16:04:43 +0100915 __set_bit(vcpu->vcpu_id, dest_map->map);
Joerg Roedel9daa5002016-02-29 16:04:44 +0100916 dest_map->vectors[vcpu->vcpu_id] = vector;
917 }
Avi Kivitya5d36f82009-12-29 12:42:16 +0200918
Paolo Bonzinibdaffe12015-07-29 15:03:06 +0200919 if (apic_test_vector(vector, apic->regs + APIC_TMR) != !!trig_mode) {
920 if (trig_mode)
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -0500921 kvm_lapic_set_vector(vector, apic->regs + APIC_TMR);
Paolo Bonzinibdaffe12015-07-29 15:03:06 +0200922 else
923 apic_clear_vector(vector, apic->regs + APIC_TMR);
924 }
925
Andrey Smetanind62caab2015-11-10 15:36:33 +0300926 if (vcpu->arch.apicv_active)
Yang Zhang5a717852013-04-11 19:25:16 +0800927 kvm_x86_ops->deliver_posted_interrupt(vcpu, vector);
Jan Kiszka11f5cc02013-07-25 09:58:45 +0200928 else {
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -0500929 kvm_lapic_set_irr(vector, apic);
Yang Zhang5a717852013-04-11 19:25:16 +0800930
931 kvm_make_request(KVM_REQ_EVENT, vcpu);
932 kvm_vcpu_kick(vcpu);
Eddie Dong97222cc2007-09-12 10:58:04 +0300933 }
Eddie Dong97222cc2007-09-12 10:58:04 +0300934 break;
935
936 case APIC_DM_REMRD:
Raghavendra K T24d21662013-08-26 14:18:35 +0530937 result = 1;
938 vcpu->arch.pv.pv_unhalted = 1;
939 kvm_make_request(KVM_REQ_EVENT, vcpu);
940 kvm_vcpu_kick(vcpu);
Eddie Dong97222cc2007-09-12 10:58:04 +0300941 break;
942
943 case APIC_DM_SMI:
Paolo Bonzini64d60672015-05-07 11:36:11 +0200944 result = 1;
945 kvm_make_request(KVM_REQ_SMI, vcpu);
946 kvm_vcpu_kick(vcpu);
Eddie Dong97222cc2007-09-12 10:58:04 +0300947 break;
Sheng Yang3419ffc2008-05-15 09:52:48 +0800948
Eddie Dong97222cc2007-09-12 10:58:04 +0300949 case APIC_DM_NMI:
Gleb Natapov6da7e3f2009-03-05 16:34:44 +0200950 result = 1;
Sheng Yang3419ffc2008-05-15 09:52:48 +0800951 kvm_inject_nmi(vcpu);
Jan Kiszka26df99c2008-09-26 09:30:54 +0200952 kvm_vcpu_kick(vcpu);
Eddie Dong97222cc2007-09-12 10:58:04 +0300953 break;
954
955 case APIC_DM_INIT:
Julian Stecklinaa52315e2012-01-16 14:02:20 +0100956 if (!trig_mode || level) {
Gleb Natapov6da7e3f2009-03-05 16:34:44 +0200957 result = 1;
Jan Kiszka66450a22013-03-13 12:42:34 +0100958 /* assumes that there are only KVM_APIC_INIT/SIPI */
959 apic->pending_events = (1UL << KVM_APIC_INIT);
960 /* make sure pending_events is visible before sending
961 * the request */
962 smp_wmb();
Avi Kivity3842d132010-07-27 12:30:24 +0300963 kvm_make_request(KVM_REQ_EVENT, vcpu);
He, Qingc5ec1532007-09-03 17:07:41 +0300964 kvm_vcpu_kick(vcpu);
965 } else {
Jan Kiszka1b10bf32008-09-30 10:41:06 +0200966 apic_debug("Ignoring de-assert INIT to vcpu %d\n",
967 vcpu->vcpu_id);
He, Qingc5ec1532007-09-03 17:07:41 +0300968 }
Eddie Dong97222cc2007-09-12 10:58:04 +0300969 break;
970
971 case APIC_DM_STARTUP:
Jan Kiszka1b10bf32008-09-30 10:41:06 +0200972 apic_debug("SIPI to vcpu %d vector 0x%02x\n",
973 vcpu->vcpu_id, vector);
Jan Kiszka66450a22013-03-13 12:42:34 +0100974 result = 1;
975 apic->sipi_vector = vector;
976 /* make sure sipi_vector is visible for the receiver */
977 smp_wmb();
978 set_bit(KVM_APIC_SIPI, &apic->pending_events);
979 kvm_make_request(KVM_REQ_EVENT, vcpu);
980 kvm_vcpu_kick(vcpu);
Eddie Dong97222cc2007-09-12 10:58:04 +0300981 break;
982
Jan Kiszka23930f92008-09-26 09:30:52 +0200983 case APIC_DM_EXTINT:
984 /*
985 * Should only be called by kvm_apic_local_deliver() with LVT0,
986 * before NMI watchdog was enabled. Already handled by
987 * kvm_apic_accept_pic_intr().
988 */
989 break;
990
Eddie Dong97222cc2007-09-12 10:58:04 +0300991 default:
992 printk(KERN_ERR "TODO: unsupported delivery mode %x\n",
993 delivery_mode);
994 break;
995 }
996 return result;
997}
998
Gleb Natapove1035712009-03-05 16:34:59 +0200999int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
Eddie Dong97222cc2007-09-12 10:58:04 +03001000{
Gleb Natapove1035712009-03-05 16:34:59 +02001001 return vcpu1->arch.apic_arb_prio - vcpu2->arch.apic_arb_prio;
Zhang Xiantao8be54532007-12-02 22:35:57 +08001002}
1003
Paolo Bonzini3bb345f2015-07-29 10:43:18 +02001004static bool kvm_ioapic_handles_vector(struct kvm_lapic *apic, int vector)
1005{
Andrey Smetanin63086302015-11-10 15:36:32 +03001006 return test_bit(vector, apic->vcpu->arch.ioapic_handled_vectors);
Paolo Bonzini3bb345f2015-07-29 10:43:18 +02001007}
1008
Yang Zhangc7c9c562013-01-25 10:18:51 +08001009static void kvm_ioapic_send_eoi(struct kvm_lapic *apic, int vector)
1010{
Steve Rutherford7543a632015-07-29 23:21:41 -07001011 int trigger_mode;
Paolo Bonzini3bb345f2015-07-29 10:43:18 +02001012
Steve Rutherford7543a632015-07-29 23:21:41 -07001013 /* Eoi the ioapic only if the ioapic doesn't own the vector. */
1014 if (!kvm_ioapic_handles_vector(apic, vector))
1015 return;
1016
1017 /* Request a KVM exit to inform the userspace IOAPIC. */
1018 if (irqchip_split(apic->vcpu->kvm)) {
1019 apic->vcpu->arch.pending_ioapic_eoi = vector;
1020 kvm_make_request(KVM_REQ_IOAPIC_EOI_EXIT, apic->vcpu);
1021 return;
Yang Zhangc7c9c562013-01-25 10:18:51 +08001022 }
Steve Rutherford7543a632015-07-29 23:21:41 -07001023
1024 if (apic_test_vector(vector, apic->regs + APIC_TMR))
1025 trigger_mode = IOAPIC_LEVEL_TRIG;
1026 else
1027 trigger_mode = IOAPIC_EDGE_TRIG;
1028
1029 kvm_ioapic_update_eoi(apic->vcpu, vector, trigger_mode);
Yang Zhangc7c9c562013-01-25 10:18:51 +08001030}
1031
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03001032static int apic_set_eoi(struct kvm_lapic *apic)
Eddie Dong97222cc2007-09-12 10:58:04 +03001033{
1034 int vector = apic_find_highest_isr(apic);
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03001035
1036 trace_kvm_eoi(apic, vector);
1037
Eddie Dong97222cc2007-09-12 10:58:04 +03001038 /*
1039 * Not every write EOI will has corresponding ISR,
1040 * one example is when Kernel check timer on setup_IO_APIC
1041 */
1042 if (vector == -1)
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03001043 return vector;
Eddie Dong97222cc2007-09-12 10:58:04 +03001044
Michael S. Tsirkin8680b942012-06-24 19:24:26 +03001045 apic_clear_isr(vector, apic);
Eddie Dong97222cc2007-09-12 10:58:04 +03001046 apic_update_ppr(apic);
1047
Andrey Smetanin5c9194122015-11-10 15:36:34 +03001048 if (test_bit(vector, vcpu_to_synic(apic->vcpu)->vec_bitmap))
1049 kvm_hv_synic_send_eoi(apic->vcpu, vector);
1050
Yang Zhangc7c9c562013-01-25 10:18:51 +08001051 kvm_ioapic_send_eoi(apic, vector);
Avi Kivity3842d132010-07-27 12:30:24 +03001052 kvm_make_request(KVM_REQ_EVENT, apic->vcpu);
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03001053 return vector;
Eddie Dong97222cc2007-09-12 10:58:04 +03001054}
1055
Yang Zhangc7c9c562013-01-25 10:18:51 +08001056/*
1057 * this interface assumes a trap-like exit, which has already finished
1058 * desired side effect including vISR and vPPR update.
1059 */
1060void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector)
1061{
1062 struct kvm_lapic *apic = vcpu->arch.apic;
1063
1064 trace_kvm_eoi(apic, vector);
1065
1066 kvm_ioapic_send_eoi(apic, vector);
1067 kvm_make_request(KVM_REQ_EVENT, apic->vcpu);
1068}
1069EXPORT_SYMBOL_GPL(kvm_apic_set_eoi_accelerated);
1070
Eddie Dong97222cc2007-09-12 10:58:04 +03001071static void apic_send_ipi(struct kvm_lapic *apic)
1072{
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05001073 u32 icr_low = kvm_lapic_get_reg(apic, APIC_ICR);
1074 u32 icr_high = kvm_lapic_get_reg(apic, APIC_ICR2);
Gleb Natapov58c2dde2009-03-05 16:35:04 +02001075 struct kvm_lapic_irq irq;
Eddie Dong97222cc2007-09-12 10:58:04 +03001076
Gleb Natapov58c2dde2009-03-05 16:35:04 +02001077 irq.vector = icr_low & APIC_VECTOR_MASK;
1078 irq.delivery_mode = icr_low & APIC_MODE_MASK;
1079 irq.dest_mode = icr_low & APIC_DEST_MASK;
Paolo Bonzinib7cb2232015-04-21 14:57:05 +02001080 irq.level = (icr_low & APIC_INT_ASSERT) != 0;
Gleb Natapov58c2dde2009-03-05 16:35:04 +02001081 irq.trig_mode = icr_low & APIC_INT_LEVELTRIG;
1082 irq.shorthand = icr_low & APIC_SHORT_MASK;
James Sullivan93bbf0b2015-03-18 19:26:03 -06001083 irq.msi_redir_hint = false;
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001084 if (apic_x2apic_mode(apic))
1085 irq.dest_id = icr_high;
1086 else
1087 irq.dest_id = GET_APIC_DEST_FIELD(icr_high);
Eddie Dong97222cc2007-09-12 10:58:04 +03001088
Gleb Natapov1000ff82009-07-07 16:00:57 +03001089 trace_kvm_apic_ipi(icr_low, irq.dest_id);
1090
Eddie Dong97222cc2007-09-12 10:58:04 +03001091 apic_debug("icr_high 0x%x, icr_low 0x%x, "
1092 "short_hand 0x%x, dest 0x%x, trig_mode 0x%x, level 0x%x, "
James Sullivan93bbf0b2015-03-18 19:26:03 -06001093 "dest_mode 0x%x, delivery_mode 0x%x, vector 0x%x, "
1094 "msi_redir_hint 0x%x\n",
Glauber Costa9b5843dd2009-04-29 17:29:09 -04001095 icr_high, icr_low, irq.shorthand, irq.dest_id,
Gleb Natapov58c2dde2009-03-05 16:35:04 +02001096 irq.trig_mode, irq.level, irq.dest_mode, irq.delivery_mode,
James Sullivan93bbf0b2015-03-18 19:26:03 -06001097 irq.vector, irq.msi_redir_hint);
Eddie Dong97222cc2007-09-12 10:58:04 +03001098
Yang Zhangb4f22252013-04-11 19:21:37 +08001099 kvm_irq_delivery_to_apic(apic->vcpu->kvm, apic, &irq, NULL);
Eddie Dong97222cc2007-09-12 10:58:04 +03001100}
1101
1102static u32 apic_get_tmcct(struct kvm_lapic *apic)
1103{
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001104 ktime_t remaining, now;
Marcelo Tosattib682b812009-02-10 20:41:41 -02001105 s64 ns;
Kevin Pedretti9da8f4e2007-10-21 08:55:50 +02001106 u32 tmcct;
Eddie Dong97222cc2007-09-12 10:58:04 +03001107
1108 ASSERT(apic != NULL);
1109
Kevin Pedretti9da8f4e2007-10-21 08:55:50 +02001110 /* if initial count is 0, current count should also be 0 */
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05001111 if (kvm_lapic_get_reg(apic, APIC_TMICT) == 0 ||
Andy Honigb963a222013-11-19 14:12:18 -08001112 apic->lapic_timer.period == 0)
Kevin Pedretti9da8f4e2007-10-21 08:55:50 +02001113 return 0;
1114
Paolo Bonzini55878592016-10-25 15:23:49 +02001115 now = ktime_get();
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001116 remaining = ktime_sub(apic->lapic_timer.target_expiration, now);
Marcelo Tosattib682b812009-02-10 20:41:41 -02001117 if (ktime_to_ns(remaining) < 0)
Thomas Gleixner8b0e1952016-12-25 12:30:41 +01001118 remaining = 0;
Eddie Dong97222cc2007-09-12 10:58:04 +03001119
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001120 ns = mod_64(ktime_to_ns(remaining), apic->lapic_timer.period);
1121 tmcct = div64_u64(ns,
1122 (APIC_BUS_CYCLE_NS * apic->divide_count));
Eddie Dong97222cc2007-09-12 10:58:04 +03001123
1124 return tmcct;
1125}
1126
Avi Kivityb209749f2007-10-22 16:50:39 +02001127static void __report_tpr_access(struct kvm_lapic *apic, bool write)
1128{
1129 struct kvm_vcpu *vcpu = apic->vcpu;
1130 struct kvm_run *run = vcpu->run;
1131
Avi Kivitya8eeb042010-05-10 12:34:53 +03001132 kvm_make_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu);
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001133 run->tpr_access.rip = kvm_rip_read(vcpu);
Avi Kivityb209749f2007-10-22 16:50:39 +02001134 run->tpr_access.is_write = write;
1135}
1136
1137static inline void report_tpr_access(struct kvm_lapic *apic, bool write)
1138{
1139 if (apic->vcpu->arch.tpr_access_reporting)
1140 __report_tpr_access(apic, write);
1141}
1142
Eddie Dong97222cc2007-09-12 10:58:04 +03001143static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset)
1144{
1145 u32 val = 0;
1146
1147 if (offset >= LAPIC_MMIO_LENGTH)
1148 return 0;
1149
1150 switch (offset) {
1151 case APIC_ARBPRI:
Jan Kiszka7712de82011-09-12 11:25:51 +02001152 apic_debug("Access APIC ARBPRI register which is for P6\n");
Eddie Dong97222cc2007-09-12 10:58:04 +03001153 break;
1154
1155 case APIC_TMCCT: /* Timer CCR */
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001156 if (apic_lvtt_tscdeadline(apic))
1157 return 0;
1158
Eddie Dong97222cc2007-09-12 10:58:04 +03001159 val = apic_get_tmcct(apic);
1160 break;
Avi Kivity4a4541a2012-07-22 17:41:00 +03001161 case APIC_PROCPRI:
1162 apic_update_ppr(apic);
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05001163 val = kvm_lapic_get_reg(apic, offset);
Avi Kivity4a4541a2012-07-22 17:41:00 +03001164 break;
Avi Kivityb209749f2007-10-22 16:50:39 +02001165 case APIC_TASKPRI:
1166 report_tpr_access(apic, false);
1167 /* fall thru */
Eddie Dong97222cc2007-09-12 10:58:04 +03001168 default:
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05001169 val = kvm_lapic_get_reg(apic, offset);
Eddie Dong97222cc2007-09-12 10:58:04 +03001170 break;
1171 }
1172
1173 return val;
1174}
1175
Gregory Haskinsd76685c2009-06-01 12:54:50 -04001176static inline struct kvm_lapic *to_lapic(struct kvm_io_device *dev)
1177{
1178 return container_of(dev, struct kvm_lapic, dev);
1179}
1180
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001181int kvm_lapic_reg_read(struct kvm_lapic *apic, u32 offset, int len,
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001182 void *data)
Michael S. Tsirkinbda90202009-06-29 22:24:32 +03001183{
Eddie Dong97222cc2007-09-12 10:58:04 +03001184 unsigned char alignment = offset & 0xf;
1185 u32 result;
Guo Chaod5b0b5b2012-06-28 15:22:57 +08001186 /* this bitmask has a bit cleared for each reserved register */
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001187 static const u64 rmask = 0x43ff01ffffffe70cULL;
Eddie Dong97222cc2007-09-12 10:58:04 +03001188
1189 if ((alignment + len) > 4) {
Gleb Natapov4088bb32009-07-08 11:26:54 +03001190 apic_debug("KVM_APIC_READ: alignment error %x %d\n",
1191 offset, len);
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001192 return 1;
Eddie Dong97222cc2007-09-12 10:58:04 +03001193 }
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001194
1195 if (offset > 0x3f0 || !(rmask & (1ULL << (offset >> 4)))) {
Gleb Natapov4088bb32009-07-08 11:26:54 +03001196 apic_debug("KVM_APIC_READ: read reserved register %x\n",
1197 offset);
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001198 return 1;
1199 }
1200
Eddie Dong97222cc2007-09-12 10:58:04 +03001201 result = __apic_read(apic, offset & ~0xf);
1202
Marcelo Tosatti229456f2009-06-17 09:22:14 -03001203 trace_kvm_apic_read(offset, result);
1204
Eddie Dong97222cc2007-09-12 10:58:04 +03001205 switch (len) {
1206 case 1:
1207 case 2:
1208 case 4:
1209 memcpy(data, (char *)&result + alignment, len);
1210 break;
1211 default:
1212 printk(KERN_ERR "Local APIC read with len = %x, "
1213 "should be 1,2, or 4 instead\n", len);
1214 break;
1215 }
Michael S. Tsirkinbda90202009-06-29 22:24:32 +03001216 return 0;
Eddie Dong97222cc2007-09-12 10:58:04 +03001217}
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001218EXPORT_SYMBOL_GPL(kvm_lapic_reg_read);
Eddie Dong97222cc2007-09-12 10:58:04 +03001219
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001220static int apic_mmio_in_range(struct kvm_lapic *apic, gpa_t addr)
1221{
Gleb Natapovc48f1492012-08-05 15:58:33 +03001222 return kvm_apic_hw_enabled(apic) &&
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001223 addr >= apic->base_address &&
1224 addr < apic->base_address + LAPIC_MMIO_LENGTH;
1225}
1226
Nikolay Nikolaeve32edf42015-03-26 14:39:28 +00001227static int apic_mmio_read(struct kvm_vcpu *vcpu, struct kvm_io_device *this,
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001228 gpa_t address, int len, void *data)
1229{
1230 struct kvm_lapic *apic = to_lapic(this);
1231 u32 offset = address - apic->base_address;
1232
1233 if (!apic_mmio_in_range(apic, address))
1234 return -EOPNOTSUPP;
1235
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001236 kvm_lapic_reg_read(apic, offset, len, data);
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001237
1238 return 0;
1239}
1240
Eddie Dong97222cc2007-09-12 10:58:04 +03001241static void update_divide_count(struct kvm_lapic *apic)
1242{
1243 u32 tmp1, tmp2, tdcr;
1244
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05001245 tdcr = kvm_lapic_get_reg(apic, APIC_TDCR);
Eddie Dong97222cc2007-09-12 10:58:04 +03001246 tmp1 = tdcr & 0xf;
1247 tmp2 = ((tmp1 & 0x3) | ((tmp1 & 0x8) >> 1)) + 1;
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001248 apic->divide_count = 0x1 << (tmp2 & 0x7);
Eddie Dong97222cc2007-09-12 10:58:04 +03001249
1250 apic_debug("timer divide count is 0x%x\n",
Glauber Costa9b5843dd2009-04-29 17:29:09 -04001251 apic->divide_count);
Eddie Dong97222cc2007-09-12 10:58:04 +03001252}
1253
Radim Krčmářb6ac0692015-06-05 20:57:41 +02001254static void apic_update_lvtt(struct kvm_lapic *apic)
1255{
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05001256 u32 timer_mode = kvm_lapic_get_reg(apic, APIC_LVTT) &
Radim Krčmářb6ac0692015-06-05 20:57:41 +02001257 apic->lapic_timer.timer_mode_mask;
1258
1259 if (apic->lapic_timer.timer_mode != timer_mode) {
1260 apic->lapic_timer.timer_mode = timer_mode;
1261 hrtimer_cancel(&apic->lapic_timer.timer);
1262 }
1263}
1264
Radim Krčmář5d87db72014-10-10 19:15:08 +02001265static void apic_timer_expired(struct kvm_lapic *apic)
1266{
1267 struct kvm_vcpu *vcpu = apic->vcpu;
Marcelo Tosatti85773702016-02-19 09:46:39 +01001268 struct swait_queue_head *q = &vcpu->wq;
Marcelo Tosattid0659d92014-12-16 09:08:15 -05001269 struct kvm_timer *ktimer = &apic->lapic_timer;
Radim Krčmář5d87db72014-10-10 19:15:08 +02001270
Radim Krčmář5d87db72014-10-10 19:15:08 +02001271 if (atomic_read(&apic->lapic_timer.pending))
1272 return;
1273
1274 atomic_inc(&apic->lapic_timer.pending);
Nicholas Krausebab5bb32015-01-01 22:05:18 -05001275 kvm_set_pending_timer(vcpu);
Radim Krčmář5d87db72014-10-10 19:15:08 +02001276
Marcelo Tosatti85773702016-02-19 09:46:39 +01001277 if (swait_active(q))
1278 swake_up(q);
Marcelo Tosattid0659d92014-12-16 09:08:15 -05001279
1280 if (apic_lvtt_tscdeadline(apic))
1281 ktimer->expired_tscdeadline = ktimer->tscdeadline;
1282}
1283
1284/*
1285 * On APICv, this test will cause a busy wait
1286 * during a higher-priority task.
1287 */
1288
1289static bool lapic_timer_int_injected(struct kvm_vcpu *vcpu)
1290{
1291 struct kvm_lapic *apic = vcpu->arch.apic;
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05001292 u32 reg = kvm_lapic_get_reg(apic, APIC_LVTT);
Marcelo Tosattid0659d92014-12-16 09:08:15 -05001293
1294 if (kvm_apic_hw_enabled(apic)) {
1295 int vec = reg & APIC_VECTOR_MASK;
Marcelo Tosattif9339862015-02-02 15:26:08 -02001296 void *bitmap = apic->regs + APIC_ISR;
Marcelo Tosattid0659d92014-12-16 09:08:15 -05001297
Andrey Smetanind62caab2015-11-10 15:36:33 +03001298 if (vcpu->arch.apicv_active)
Marcelo Tosattif9339862015-02-02 15:26:08 -02001299 bitmap = apic->regs + APIC_IRR;
1300
1301 if (apic_test_vector(vec, bitmap))
1302 return true;
Marcelo Tosattid0659d92014-12-16 09:08:15 -05001303 }
1304 return false;
1305}
1306
1307void wait_lapic_expire(struct kvm_vcpu *vcpu)
1308{
1309 struct kvm_lapic *apic = vcpu->arch.apic;
1310 u64 guest_tsc, tsc_deadline;
1311
Paolo Bonzinibce87cc2016-01-08 13:48:51 +01001312 if (!lapic_in_kernel(vcpu))
Marcelo Tosattid0659d92014-12-16 09:08:15 -05001313 return;
1314
1315 if (apic->lapic_timer.expired_tscdeadline == 0)
1316 return;
1317
1318 if (!lapic_timer_int_injected(vcpu))
1319 return;
1320
1321 tsc_deadline = apic->lapic_timer.expired_tscdeadline;
1322 apic->lapic_timer.expired_tscdeadline = 0;
Haozhong Zhang4ba76532015-10-20 15:39:07 +08001323 guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc());
Marcelo Tosatti6c19b752014-12-16 09:08:16 -05001324 trace_kvm_wait_lapic_expire(vcpu->vcpu_id, guest_tsc - tsc_deadline);
Marcelo Tosattid0659d92014-12-16 09:08:15 -05001325
1326 /* __delay is delay_tsc whenever the hardware has TSC, thus always. */
1327 if (guest_tsc < tsc_deadline)
Marcelo Tosattib606f182016-06-20 22:33:48 -03001328 __delay(min(tsc_deadline - guest_tsc,
1329 nsec_to_cycles(vcpu, lapic_timer_advance_ns)));
Radim Krčmář5d87db72014-10-10 19:15:08 +02001330}
1331
Yunhong Jiang53f9eed2016-06-13 14:20:00 -07001332static void start_sw_tscdeadline(struct kvm_lapic *apic)
1333{
1334 u64 guest_tsc, tscdeadline = apic->lapic_timer.tscdeadline;
1335 u64 ns = 0;
1336 ktime_t expire;
1337 struct kvm_vcpu *vcpu = apic->vcpu;
1338 unsigned long this_tsc_khz = vcpu->arch.virtual_tsc_khz;
1339 unsigned long flags;
1340 ktime_t now;
1341
1342 if (unlikely(!tscdeadline || !this_tsc_khz))
1343 return;
1344
1345 local_irq_save(flags);
1346
Paolo Bonzini55878592016-10-25 15:23:49 +02001347 now = ktime_get();
Yunhong Jiang53f9eed2016-06-13 14:20:00 -07001348 guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc());
1349 if (likely(tscdeadline > guest_tsc)) {
1350 ns = (tscdeadline - guest_tsc) * 1000000ULL;
1351 do_div(ns, this_tsc_khz);
1352 expire = ktime_add_ns(now, ns);
1353 expire = ktime_sub_ns(expire, lapic_timer_advance_ns);
1354 hrtimer_start(&apic->lapic_timer.timer,
1355 expire, HRTIMER_MODE_ABS_PINNED);
1356 } else
1357 apic_timer_expired(apic);
1358
1359 local_irq_restore(flags);
1360}
1361
Wanpeng Li7d7f7da2016-10-24 18:23:09 +08001362static void start_sw_period(struct kvm_lapic *apic)
1363{
Wanpeng Li7d7f7da2016-10-24 18:23:09 +08001364 if (!apic->lapic_timer.period)
1365 return;
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001366
1367 if (apic_lvtt_oneshot(apic) &&
Paolo Bonzini55878592016-10-25 15:23:49 +02001368 ktime_after(ktime_get(),
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001369 apic->lapic_timer.target_expiration)) {
1370 apic_timer_expired(apic);
1371 return;
1372 }
1373
1374 hrtimer_start(&apic->lapic_timer.timer,
1375 apic->lapic_timer.target_expiration,
1376 HRTIMER_MODE_ABS_PINNED);
1377}
1378
1379static bool set_target_expiration(struct kvm_lapic *apic)
1380{
1381 ktime_t now;
1382 u64 tscl = rdtsc();
1383
Paolo Bonzini55878592016-10-25 15:23:49 +02001384 now = ktime_get();
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001385 apic->lapic_timer.period = (u64)kvm_lapic_get_reg(apic, APIC_TMICT)
1386 * APIC_BUS_CYCLE_NS * apic->divide_count;
1387
1388 if (!apic->lapic_timer.period)
1389 return false;
1390
Wanpeng Li7d7f7da2016-10-24 18:23:09 +08001391 /*
1392 * Do not allow the guest to program periodic timers with small
1393 * interval, since the hrtimers are not throttled by the host
1394 * scheduler.
1395 */
1396 if (apic_lvtt_period(apic)) {
1397 s64 min_period = min_timer_period_us * 1000LL;
1398
1399 if (apic->lapic_timer.period < min_period) {
1400 pr_info_ratelimited(
1401 "kvm: vcpu %i: requested %lld ns "
1402 "lapic timer period limited to %lld ns\n",
1403 apic->vcpu->vcpu_id,
1404 apic->lapic_timer.period, min_period);
1405 apic->lapic_timer.period = min_period;
1406 }
1407 }
1408
Wanpeng Li7d7f7da2016-10-24 18:23:09 +08001409 apic_debug("%s: bus cycle is %" PRId64 "ns, now 0x%016"
1410 PRIx64 ", "
1411 "timer initial count 0x%x, period %lldns, "
1412 "expire @ 0x%016" PRIx64 ".\n", __func__,
1413 APIC_BUS_CYCLE_NS, ktime_to_ns(now),
1414 kvm_lapic_get_reg(apic, APIC_TMICT),
1415 apic->lapic_timer.period,
1416 ktime_to_ns(ktime_add_ns(now,
1417 apic->lapic_timer.period)));
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001418
1419 apic->lapic_timer.tscdeadline = kvm_read_l1_tsc(apic->vcpu, tscl) +
1420 nsec_to_cycles(apic->vcpu, apic->lapic_timer.period);
1421 apic->lapic_timer.target_expiration = ktime_add_ns(now, apic->lapic_timer.period);
1422
1423 return true;
1424}
1425
1426static void advance_periodic_target_expiration(struct kvm_lapic *apic)
1427{
1428 apic->lapic_timer.tscdeadline +=
1429 nsec_to_cycles(apic->vcpu, apic->lapic_timer.period);
1430 apic->lapic_timer.target_expiration =
1431 ktime_add_ns(apic->lapic_timer.target_expiration,
1432 apic->lapic_timer.period);
Wanpeng Li7d7f7da2016-10-24 18:23:09 +08001433}
1434
Yunhong Jiangce7a0582016-06-13 14:20:01 -07001435bool kvm_lapic_hv_timer_in_use(struct kvm_vcpu *vcpu)
1436{
Wanpeng Li91005302016-08-03 12:04:12 +08001437 if (!lapic_in_kernel(vcpu))
1438 return false;
1439
Yunhong Jiangce7a0582016-06-13 14:20:01 -07001440 return vcpu->arch.apic->lapic_timer.hv_timer_in_use;
1441}
1442EXPORT_SYMBOL_GPL(kvm_lapic_hv_timer_in_use);
1443
Wanpeng Li7e810a32016-10-24 18:23:12 +08001444static void cancel_hv_timer(struct kvm_lapic *apic)
Wanpeng Libd97ad02016-06-30 08:52:49 +08001445{
1446 kvm_x86_ops->cancel_hv_timer(apic->vcpu);
1447 apic->lapic_timer.hv_timer_in_use = false;
1448}
1449
Wanpeng Li7e810a32016-10-24 18:23:12 +08001450static bool start_hv_timer(struct kvm_lapic *apic)
Wanpeng Li196f20c2016-06-28 14:54:19 +08001451{
1452 u64 tscdeadline = apic->lapic_timer.tscdeadline;
1453
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001454 if ((atomic_read(&apic->lapic_timer.pending) &&
1455 !apic_lvtt_period(apic)) ||
Wanpeng Li196f20c2016-06-28 14:54:19 +08001456 kvm_x86_ops->set_hv_timer(apic->vcpu, tscdeadline)) {
1457 if (apic->lapic_timer.hv_timer_in_use)
Wanpeng Li7e810a32016-10-24 18:23:12 +08001458 cancel_hv_timer(apic);
Wanpeng Li196f20c2016-06-28 14:54:19 +08001459 } else {
1460 apic->lapic_timer.hv_timer_in_use = true;
1461 hrtimer_cancel(&apic->lapic_timer.timer);
1462
1463 /* In case the sw timer triggered in the window */
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001464 if (atomic_read(&apic->lapic_timer.pending) &&
1465 !apic_lvtt_period(apic))
Wanpeng Li7e810a32016-10-24 18:23:12 +08001466 cancel_hv_timer(apic);
Wanpeng Li196f20c2016-06-28 14:54:19 +08001467 }
1468 trace_kvm_hv_timer_state(apic->vcpu->vcpu_id,
1469 apic->lapic_timer.hv_timer_in_use);
1470 return apic->lapic_timer.hv_timer_in_use;
1471}
1472
Eddie Dong97222cc2007-09-12 10:58:04 +03001473void kvm_lapic_expired_hv_timer(struct kvm_vcpu *vcpu)
1474{
1475 struct kvm_lapic *apic = vcpu->arch.apic;
1476
1477 WARN_ON(!apic->lapic_timer.hv_timer_in_use);
1478 WARN_ON(swait_active(&vcpu->wq));
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001479 cancel_hv_timer(apic);
Eddie Dong97222cc2007-09-12 10:58:04 +03001480 apic_timer_expired(apic);
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001481
1482 if (apic_lvtt_period(apic) && apic->lapic_timer.period) {
1483 advance_periodic_target_expiration(apic);
1484 if (!start_hv_timer(apic))
1485 start_sw_period(apic);
1486 }
Eddie Dong97222cc2007-09-12 10:58:04 +03001487}
1488EXPORT_SYMBOL_GPL(kvm_lapic_expired_hv_timer);
1489
Yunhong Jiangce7a0582016-06-13 14:20:01 -07001490void kvm_lapic_switch_to_hv_timer(struct kvm_vcpu *vcpu)
1491{
1492 struct kvm_lapic *apic = vcpu->arch.apic;
1493
1494 WARN_ON(apic->lapic_timer.hv_timer_in_use);
1495
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001496 start_hv_timer(apic);
Yunhong Jiangce7a0582016-06-13 14:20:01 -07001497}
1498EXPORT_SYMBOL_GPL(kvm_lapic_switch_to_hv_timer);
1499
1500void kvm_lapic_switch_to_sw_timer(struct kvm_vcpu *vcpu)
1501{
1502 struct kvm_lapic *apic = vcpu->arch.apic;
1503
1504 /* Possibly the TSC deadline timer is not enabled yet */
1505 if (!apic->lapic_timer.hv_timer_in_use)
1506 return;
1507
Wanpeng Li7e810a32016-10-24 18:23:12 +08001508 cancel_hv_timer(apic);
Yunhong Jiangce7a0582016-06-13 14:20:01 -07001509
1510 if (atomic_read(&apic->lapic_timer.pending))
1511 return;
1512
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001513 if (apic_lvtt_period(apic) || apic_lvtt_oneshot(apic))
1514 start_sw_period(apic);
1515 else if (apic_lvtt_tscdeadline(apic))
1516 start_sw_tscdeadline(apic);
Yunhong Jiangce7a0582016-06-13 14:20:01 -07001517}
1518EXPORT_SYMBOL_GPL(kvm_lapic_switch_to_sw_timer);
1519
Eddie Dong97222cc2007-09-12 10:58:04 +03001520static void start_apic_timer(struct kvm_lapic *apic)
1521{
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001522 atomic_set(&apic->lapic_timer.pending, 0);
Avi Kivity0b975a32008-02-24 14:37:50 +02001523
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001524 if (apic_lvtt_period(apic) || apic_lvtt_oneshot(apic)) {
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001525 if (set_target_expiration(apic) &&
1526 !(kvm_x86_ops->set_hv_timer && start_hv_timer(apic)))
1527 start_sw_period(apic);
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001528 } else if (apic_lvtt_tscdeadline(apic)) {
Wanpeng Li7e810a32016-10-24 18:23:12 +08001529 if (!(kvm_x86_ops->set_hv_timer && start_hv_timer(apic)))
Yunhong Jiangce7a0582016-06-13 14:20:01 -07001530 start_sw_tscdeadline(apic);
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001531 }
Eddie Dong97222cc2007-09-12 10:58:04 +03001532}
1533
Jan Kiszkacc6e4622008-10-20 10:20:03 +02001534static void apic_manage_nmi_watchdog(struct kvm_lapic *apic, u32 lvt0_val)
1535{
Radim Krčmář59fd1322015-06-30 22:19:16 +02001536 bool lvt0_in_nmi_mode = apic_lvt_nmi_mode(lvt0_val);
Jan Kiszkacc6e4622008-10-20 10:20:03 +02001537
Radim Krčmář59fd1322015-06-30 22:19:16 +02001538 if (apic->lvt0_in_nmi_mode != lvt0_in_nmi_mode) {
1539 apic->lvt0_in_nmi_mode = lvt0_in_nmi_mode;
1540 if (lvt0_in_nmi_mode) {
Jan Kiszkacc6e4622008-10-20 10:20:03 +02001541 apic_debug("Receive NMI setting on APIC_LVT0 "
1542 "for cpu %d\n", apic->vcpu->vcpu_id);
Radim Krčmář42720132015-07-01 15:31:49 +02001543 atomic_inc(&apic->vcpu->kvm->arch.vapics_in_nmi_mode);
Radim Krčmář59fd1322015-06-30 22:19:16 +02001544 } else
1545 atomic_dec(&apic->vcpu->kvm->arch.vapics_in_nmi_mode);
1546 }
Jan Kiszkacc6e4622008-10-20 10:20:03 +02001547}
1548
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001549int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val)
Eddie Dong97222cc2007-09-12 10:58:04 +03001550{
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001551 int ret = 0;
Eddie Dong97222cc2007-09-12 10:58:04 +03001552
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001553 trace_kvm_apic_write(reg, val);
Eddie Dong97222cc2007-09-12 10:58:04 +03001554
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001555 switch (reg) {
Eddie Dong97222cc2007-09-12 10:58:04 +03001556 case APIC_ID: /* Local APIC ID */
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001557 if (!apic_x2apic_mode(apic))
Radim Krčmářa92e2542016-07-12 22:09:22 +02001558 kvm_apic_set_xapic_id(apic, val >> 24);
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001559 else
1560 ret = 1;
Eddie Dong97222cc2007-09-12 10:58:04 +03001561 break;
1562
1563 case APIC_TASKPRI:
Avi Kivityb209749f2007-10-22 16:50:39 +02001564 report_tpr_access(apic, true);
Eddie Dong97222cc2007-09-12 10:58:04 +03001565 apic_set_tpr(apic, val & 0xff);
1566 break;
1567
1568 case APIC_EOI:
1569 apic_set_eoi(apic);
1570 break;
1571
1572 case APIC_LDR:
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001573 if (!apic_x2apic_mode(apic))
Gleb Natapov1e08ec42012-09-13 17:19:24 +03001574 kvm_apic_set_ldr(apic, val & APIC_LDR_MASK);
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001575 else
1576 ret = 1;
Eddie Dong97222cc2007-09-12 10:58:04 +03001577 break;
1578
1579 case APIC_DFR:
Gleb Natapov1e08ec42012-09-13 17:19:24 +03001580 if (!apic_x2apic_mode(apic)) {
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001581 kvm_lapic_set_reg(apic, APIC_DFR, val | 0x0FFFFFFF);
Gleb Natapov1e08ec42012-09-13 17:19:24 +03001582 recalculate_apic_map(apic->vcpu->kvm);
1583 } else
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001584 ret = 1;
Eddie Dong97222cc2007-09-12 10:58:04 +03001585 break;
1586
Gleb Natapovfc61b802009-07-05 17:39:35 +03001587 case APIC_SPIV: {
1588 u32 mask = 0x3ff;
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05001589 if (kvm_lapic_get_reg(apic, APIC_LVR) & APIC_LVR_DIRECTED_EOI)
Gleb Natapovfc61b802009-07-05 17:39:35 +03001590 mask |= APIC_SPIV_DIRECTED_EOI;
Gleb Natapovf8c1ea12012-08-05 15:58:31 +03001591 apic_set_spiv(apic, val & mask);
Eddie Dong97222cc2007-09-12 10:58:04 +03001592 if (!(val & APIC_SPIV_APIC_ENABLED)) {
1593 int i;
1594 u32 lvt_val;
1595
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001596 for (i = 0; i < KVM_APIC_LVT_NUM; i++) {
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05001597 lvt_val = kvm_lapic_get_reg(apic,
Eddie Dong97222cc2007-09-12 10:58:04 +03001598 APIC_LVTT + 0x10 * i);
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001599 kvm_lapic_set_reg(apic, APIC_LVTT + 0x10 * i,
Eddie Dong97222cc2007-09-12 10:58:04 +03001600 lvt_val | APIC_LVT_MASKED);
1601 }
Radim Krčmářb6ac0692015-06-05 20:57:41 +02001602 apic_update_lvtt(apic);
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001603 atomic_set(&apic->lapic_timer.pending, 0);
Eddie Dong97222cc2007-09-12 10:58:04 +03001604
1605 }
1606 break;
Gleb Natapovfc61b802009-07-05 17:39:35 +03001607 }
Eddie Dong97222cc2007-09-12 10:58:04 +03001608 case APIC_ICR:
1609 /* No delay here, so we always clear the pending bit */
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001610 kvm_lapic_set_reg(apic, APIC_ICR, val & ~(1 << 12));
Eddie Dong97222cc2007-09-12 10:58:04 +03001611 apic_send_ipi(apic);
1612 break;
1613
1614 case APIC_ICR2:
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001615 if (!apic_x2apic_mode(apic))
1616 val &= 0xff000000;
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001617 kvm_lapic_set_reg(apic, APIC_ICR2, val);
Eddie Dong97222cc2007-09-12 10:58:04 +03001618 break;
1619
Jan Kiszka23930f92008-09-26 09:30:52 +02001620 case APIC_LVT0:
Jan Kiszkacc6e4622008-10-20 10:20:03 +02001621 apic_manage_nmi_watchdog(apic, val);
Eddie Dong97222cc2007-09-12 10:58:04 +03001622 case APIC_LVTTHMR:
1623 case APIC_LVTPC:
Eddie Dong97222cc2007-09-12 10:58:04 +03001624 case APIC_LVT1:
1625 case APIC_LVTERR:
1626 /* TODO: Check vector */
Gleb Natapovc48f1492012-08-05 15:58:33 +03001627 if (!kvm_apic_sw_enabled(apic))
Eddie Dong97222cc2007-09-12 10:58:04 +03001628 val |= APIC_LVT_MASKED;
1629
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001630 val &= apic_lvt_mask[(reg - APIC_LVTT) >> 4];
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001631 kvm_lapic_set_reg(apic, reg, val);
Eddie Dong97222cc2007-09-12 10:58:04 +03001632
1633 break;
1634
Radim Krčmářb6ac0692015-06-05 20:57:41 +02001635 case APIC_LVTT:
Gleb Natapovc48f1492012-08-05 15:58:33 +03001636 if (!kvm_apic_sw_enabled(apic))
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001637 val |= APIC_LVT_MASKED;
1638 val &= (apic_lvt_mask[0] | apic->lapic_timer.timer_mode_mask);
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001639 kvm_lapic_set_reg(apic, APIC_LVTT, val);
Radim Krčmářb6ac0692015-06-05 20:57:41 +02001640 apic_update_lvtt(apic);
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001641 break;
1642
Eddie Dong97222cc2007-09-12 10:58:04 +03001643 case APIC_TMICT:
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001644 if (apic_lvtt_tscdeadline(apic))
1645 break;
1646
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001647 hrtimer_cancel(&apic->lapic_timer.timer);
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001648 kvm_lapic_set_reg(apic, APIC_TMICT, val);
Eddie Dong97222cc2007-09-12 10:58:04 +03001649 start_apic_timer(apic);
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001650 break;
Eddie Dong97222cc2007-09-12 10:58:04 +03001651
1652 case APIC_TDCR:
1653 if (val & 4)
Jan Kiszka7712de82011-09-12 11:25:51 +02001654 apic_debug("KVM_WRITE:TDCR %x\n", val);
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001655 kvm_lapic_set_reg(apic, APIC_TDCR, val);
Eddie Dong97222cc2007-09-12 10:58:04 +03001656 update_divide_count(apic);
1657 break;
1658
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001659 case APIC_ESR:
1660 if (apic_x2apic_mode(apic) && val != 0) {
Jan Kiszka7712de82011-09-12 11:25:51 +02001661 apic_debug("KVM_WRITE:ESR not zero %x\n", val);
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001662 ret = 1;
1663 }
1664 break;
1665
1666 case APIC_SELF_IPI:
1667 if (apic_x2apic_mode(apic)) {
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001668 kvm_lapic_reg_write(apic, APIC_ICR, 0x40000 | (val & 0xff));
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001669 } else
1670 ret = 1;
1671 break;
Eddie Dong97222cc2007-09-12 10:58:04 +03001672 default:
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001673 ret = 1;
Eddie Dong97222cc2007-09-12 10:58:04 +03001674 break;
1675 }
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001676 if (ret)
1677 apic_debug("Local APIC Write to read-only register %x\n", reg);
1678 return ret;
1679}
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001680EXPORT_SYMBOL_GPL(kvm_lapic_reg_write);
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001681
Nikolay Nikolaeve32edf42015-03-26 14:39:28 +00001682static int apic_mmio_write(struct kvm_vcpu *vcpu, struct kvm_io_device *this,
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001683 gpa_t address, int len, const void *data)
1684{
1685 struct kvm_lapic *apic = to_lapic(this);
1686 unsigned int offset = address - apic->base_address;
1687 u32 val;
1688
1689 if (!apic_mmio_in_range(apic, address))
1690 return -EOPNOTSUPP;
1691
1692 /*
1693 * APIC register must be aligned on 128-bits boundary.
1694 * 32/64/128 bits registers must be accessed thru 32 bits.
1695 * Refer SDM 8.4.1
1696 */
1697 if (len != 4 || (offset & 0xf)) {
1698 /* Don't shout loud, $infamous_os would cause only noise. */
1699 apic_debug("apic write: bad size=%d %lx\n", len, (long)address);
Sheng Yang756975b2009-07-06 11:05:39 +08001700 return 0;
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001701 }
1702
1703 val = *(u32*)data;
1704
1705 /* too common printing */
1706 if (offset != APIC_EOI)
1707 apic_debug("%s: offset 0x%x with length 0x%x, and value is "
1708 "0x%x\n", __func__, offset, len, val);
1709
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001710 kvm_lapic_reg_write(apic, offset & 0xff0, val);
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001711
Michael S. Tsirkinbda90202009-06-29 22:24:32 +03001712 return 0;
Eddie Dong97222cc2007-09-12 10:58:04 +03001713}
1714
Kevin Tian58fbbf22011-08-30 13:56:17 +03001715void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu)
1716{
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001717 kvm_lapic_reg_write(vcpu->arch.apic, APIC_EOI, 0);
Kevin Tian58fbbf22011-08-30 13:56:17 +03001718}
1719EXPORT_SYMBOL_GPL(kvm_lapic_set_eoi);
1720
Yang Zhang83d4c282013-01-25 10:18:49 +08001721/* emulate APIC access in a trap manner */
1722void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset)
1723{
1724 u32 val = 0;
1725
1726 /* hw has done the conditional check and inst decode */
1727 offset &= 0xff0;
1728
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001729 kvm_lapic_reg_read(vcpu->arch.apic, offset, 4, &val);
Yang Zhang83d4c282013-01-25 10:18:49 +08001730
1731 /* TODO: optimize to just emulate side effect w/o one more write */
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001732 kvm_lapic_reg_write(vcpu->arch.apic, offset, val);
Yang Zhang83d4c282013-01-25 10:18:49 +08001733}
1734EXPORT_SYMBOL_GPL(kvm_apic_write_nodecode);
1735
Rusty Russelld5894442007-10-08 10:48:30 +10001736void kvm_free_lapic(struct kvm_vcpu *vcpu)
Eddie Dong97222cc2007-09-12 10:58:04 +03001737{
Gleb Natapovf8c1ea12012-08-05 15:58:31 +03001738 struct kvm_lapic *apic = vcpu->arch.apic;
1739
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001740 if (!vcpu->arch.apic)
Eddie Dong97222cc2007-09-12 10:58:04 +03001741 return;
1742
Gleb Natapovf8c1ea12012-08-05 15:58:31 +03001743 hrtimer_cancel(&apic->lapic_timer.timer);
Eddie Dong97222cc2007-09-12 10:58:04 +03001744
Gleb Natapovc5cc4212012-08-05 15:58:30 +03001745 if (!(vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE))
1746 static_key_slow_dec_deferred(&apic_hw_disabled);
1747
Radim Krčmáře4627552014-10-30 15:06:45 +01001748 if (!apic->sw_enabled)
Gleb Natapovf8c1ea12012-08-05 15:58:31 +03001749 static_key_slow_dec_deferred(&apic_sw_disabled);
Eddie Dong97222cc2007-09-12 10:58:04 +03001750
Gleb Natapovf8c1ea12012-08-05 15:58:31 +03001751 if (apic->regs)
1752 free_page((unsigned long)apic->regs);
1753
1754 kfree(apic);
Eddie Dong97222cc2007-09-12 10:58:04 +03001755}
1756
1757/*
1758 *----------------------------------------------------------------------
1759 * LAPIC interface
1760 *----------------------------------------------------------------------
1761 */
Wanpeng Li498f8162016-10-24 18:23:11 +08001762u64 kvm_get_lapic_target_expiration_tsc(struct kvm_vcpu *vcpu)
1763{
1764 struct kvm_lapic *apic = vcpu->arch.apic;
1765
1766 if (!lapic_in_kernel(vcpu))
1767 return 0;
1768
1769 return apic->lapic_timer.tscdeadline;
1770}
Eddie Dong97222cc2007-09-12 10:58:04 +03001771
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001772u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu)
1773{
1774 struct kvm_lapic *apic = vcpu->arch.apic;
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001775
Wanpeng Lia10388e2016-10-24 18:23:10 +08001776 if (!lapic_in_kernel(vcpu) ||
1777 !apic_lvtt_tscdeadline(apic))
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001778 return 0;
1779
1780 return apic->lapic_timer.tscdeadline;
1781}
1782
1783void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data)
1784{
1785 struct kvm_lapic *apic = vcpu->arch.apic;
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001786
Paolo Bonzinibce87cc2016-01-08 13:48:51 +01001787 if (!lapic_in_kernel(vcpu) || apic_lvtt_oneshot(apic) ||
Gleb Natapov54e98182012-08-05 15:58:32 +03001788 apic_lvtt_period(apic))
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001789 return;
1790
1791 hrtimer_cancel(&apic->lapic_timer.timer);
1792 apic->lapic_timer.tscdeadline = data;
1793 start_apic_timer(apic);
1794}
1795
Eddie Dong97222cc2007-09-12 10:58:04 +03001796void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8)
1797{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001798 struct kvm_lapic *apic = vcpu->arch.apic;
Eddie Dong97222cc2007-09-12 10:58:04 +03001799
Avi Kivityb93463a2007-10-25 16:52:32 +02001800 apic_set_tpr(apic, ((cr8 & 0x0f) << 4)
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05001801 | (kvm_lapic_get_reg(apic, APIC_TASKPRI) & 4));
Eddie Dong97222cc2007-09-12 10:58:04 +03001802}
1803
1804u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu)
1805{
Eddie Dong97222cc2007-09-12 10:58:04 +03001806 u64 tpr;
1807
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05001808 tpr = (u64) kvm_lapic_get_reg(vcpu->arch.apic, APIC_TASKPRI);
Eddie Dong97222cc2007-09-12 10:58:04 +03001809
1810 return (tpr & 0xf0) >> 4;
1811}
1812
1813void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value)
1814{
Yang Zhang8d146952013-01-25 10:18:50 +08001815 u64 old_value = vcpu->arch.apic_base;
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001816 struct kvm_lapic *apic = vcpu->arch.apic;
Eddie Dong97222cc2007-09-12 10:58:04 +03001817
Jim Mattsonc7dd15b2016-11-09 09:50:11 -08001818 if (!apic)
Eddie Dong97222cc2007-09-12 10:58:04 +03001819 value |= MSR_IA32_APICBASE_BSP;
Gleb Natapovc5af89b2009-06-09 15:56:26 +03001820
Jan Kiszkae66d2ae2013-12-29 02:29:30 +01001821 vcpu->arch.apic_base = value;
1822
Jim Mattsonc7dd15b2016-11-09 09:50:11 -08001823 if ((old_value ^ value) & MSR_IA32_APICBASE_ENABLE)
1824 kvm_update_cpuid(vcpu);
1825
1826 if (!apic)
1827 return;
1828
Gleb Natapovc5cc4212012-08-05 15:58:30 +03001829 /* update jump label if enable bit changes */
Andrew Jones0dce7cd2014-01-15 13:39:59 +01001830 if ((old_value ^ value) & MSR_IA32_APICBASE_ENABLE) {
Radim Krčmář49bd29b2016-07-12 22:09:23 +02001831 if (value & MSR_IA32_APICBASE_ENABLE) {
1832 kvm_apic_set_xapic_id(apic, vcpu->vcpu_id);
Gleb Natapovc5cc4212012-08-05 15:58:30 +03001833 static_key_slow_dec_deferred(&apic_hw_disabled);
Wanpeng Li187ca842016-08-03 12:04:13 +08001834 } else {
Gleb Natapovc5cc4212012-08-05 15:58:30 +03001835 static_key_slow_inc(&apic_hw_disabled.key);
Wanpeng Li187ca842016-08-03 12:04:13 +08001836 recalculate_apic_map(vcpu->kvm);
1837 }
Gleb Natapovc5cc4212012-08-05 15:58:30 +03001838 }
1839
Yang Zhang8d146952013-01-25 10:18:50 +08001840 if ((old_value ^ value) & X2APIC_ENABLE) {
1841 if (value & X2APIC_ENABLE) {
Radim Krčmář257b9a52015-05-22 18:45:11 +02001842 kvm_apic_set_x2apic_id(apic, vcpu->vcpu_id);
Yang Zhang8d146952013-01-25 10:18:50 +08001843 kvm_x86_ops->set_virtual_x2apic_mode(vcpu, true);
1844 } else
1845 kvm_x86_ops->set_virtual_x2apic_mode(vcpu, false);
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001846 }
Yang Zhang8d146952013-01-25 10:18:50 +08001847
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001848 apic->base_address = apic->vcpu->arch.apic_base &
Eddie Dong97222cc2007-09-12 10:58:04 +03001849 MSR_IA32_APICBASE_BASE;
1850
Nadav Amitdb324fe2014-11-02 11:54:59 +02001851 if ((value & MSR_IA32_APICBASE_ENABLE) &&
1852 apic->base_address != APIC_DEFAULT_PHYS_BASE)
1853 pr_warn_once("APIC base relocation is unsupported by KVM");
1854
Eddie Dong97222cc2007-09-12 10:58:04 +03001855 /* with FSB delivery interrupt, we can restart APIC functionality */
1856 apic_debug("apic base msr is 0x%016" PRIx64 ", and base address is "
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001857 "0x%lx.\n", apic->vcpu->arch.apic_base, apic->base_address);
Eddie Dong97222cc2007-09-12 10:58:04 +03001858
1859}
1860
Nadav Amitd28bc9d2015-04-13 14:34:08 +03001861void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event)
Eddie Dong97222cc2007-09-12 10:58:04 +03001862{
1863 struct kvm_lapic *apic;
1864 int i;
1865
Harvey Harrisonb8688d52008-03-03 12:59:56 -08001866 apic_debug("%s\n", __func__);
Eddie Dong97222cc2007-09-12 10:58:04 +03001867
1868 ASSERT(vcpu);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001869 apic = vcpu->arch.apic;
Eddie Dong97222cc2007-09-12 10:58:04 +03001870 ASSERT(apic != NULL);
1871
1872 /* Stop the timer in case it's a reset to an active apic */
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001873 hrtimer_cancel(&apic->lapic_timer.timer);
Eddie Dong97222cc2007-09-12 10:58:04 +03001874
Radim Krčmář4d8e7722016-07-12 22:09:25 +02001875 if (!init_event) {
1876 kvm_lapic_set_base(vcpu, APIC_DEFAULT_PHYS_BASE |
1877 MSR_IA32_APICBASE_ENABLE);
Radim Krčmářa92e2542016-07-12 22:09:22 +02001878 kvm_apic_set_xapic_id(apic, vcpu->vcpu_id);
Radim Krčmář4d8e7722016-07-12 22:09:25 +02001879 }
Gleb Natapovfc61b802009-07-05 17:39:35 +03001880 kvm_apic_set_version(apic->vcpu);
Eddie Dong97222cc2007-09-12 10:58:04 +03001881
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001882 for (i = 0; i < KVM_APIC_LVT_NUM; i++)
1883 kvm_lapic_set_reg(apic, APIC_LVTT + 0x10 * i, APIC_LVT_MASKED);
Radim Krčmářb6ac0692015-06-05 20:57:41 +02001884 apic_update_lvtt(apic);
Paolo Bonzini0da029e2015-07-23 08:24:42 +02001885 if (kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_LINT0_REENABLED))
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001886 kvm_lapic_set_reg(apic, APIC_LVT0,
Nadav Amit90de4a12015-04-13 01:53:41 +03001887 SET_APIC_DELIVERY_MODE(0, APIC_MODE_EXTINT));
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05001888 apic_manage_nmi_watchdog(apic, kvm_lapic_get_reg(apic, APIC_LVT0));
Eddie Dong97222cc2007-09-12 10:58:04 +03001889
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001890 kvm_lapic_set_reg(apic, APIC_DFR, 0xffffffffU);
Gleb Natapovf8c1ea12012-08-05 15:58:31 +03001891 apic_set_spiv(apic, 0xff);
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001892 kvm_lapic_set_reg(apic, APIC_TASKPRI, 0);
Radim Krčmářc028dd62015-05-22 19:22:10 +02001893 if (!apic_x2apic_mode(apic))
1894 kvm_apic_set_ldr(apic, 0);
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001895 kvm_lapic_set_reg(apic, APIC_ESR, 0);
1896 kvm_lapic_set_reg(apic, APIC_ICR, 0);
1897 kvm_lapic_set_reg(apic, APIC_ICR2, 0);
1898 kvm_lapic_set_reg(apic, APIC_TDCR, 0);
1899 kvm_lapic_set_reg(apic, APIC_TMICT, 0);
Eddie Dong97222cc2007-09-12 10:58:04 +03001900 for (i = 0; i < 8; i++) {
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05001901 kvm_lapic_set_reg(apic, APIC_IRR + 0x10 * i, 0);
1902 kvm_lapic_set_reg(apic, APIC_ISR + 0x10 * i, 0);
1903 kvm_lapic_set_reg(apic, APIC_TMR + 0x10 * i, 0);
Eddie Dong97222cc2007-09-12 10:58:04 +03001904 }
Andrey Smetanind62caab2015-11-10 15:36:33 +03001905 apic->irr_pending = vcpu->arch.apicv_active;
1906 apic->isr_count = vcpu->arch.apicv_active ? 1 : 0;
Michael S. Tsirkin8680b942012-06-24 19:24:26 +03001907 apic->highest_isr_cache = -1;
Kevin Pedrettib33ac882007-10-21 08:54:53 +02001908 update_divide_count(apic);
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001909 atomic_set(&apic->lapic_timer.pending, 0);
Gleb Natapovc5af89b2009-06-09 15:56:26 +03001910 if (kvm_vcpu_is_bsp(vcpu))
Gleb Natapov5dbc8f32012-08-05 15:58:27 +03001911 kvm_lapic_set_base(vcpu,
1912 vcpu->arch.apic_base | MSR_IA32_APICBASE_BSP);
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03001913 vcpu->arch.pv_eoi.msr_val = 0;
Eddie Dong97222cc2007-09-12 10:58:04 +03001914 apic_update_ppr(apic);
1915
Gleb Natapove1035712009-03-05 16:34:59 +02001916 vcpu->arch.apic_arb_prio = 0;
Gleb Natapov41383772012-04-19 14:06:29 +03001917 vcpu->arch.apic_attention = 0;
Gleb Natapove1035712009-03-05 16:34:59 +02001918
Radim Krčmář6e500432016-12-15 18:06:46 +01001919 apic_debug("%s: vcpu=%p, id=0x%x, base_msr="
Harvey Harrisonb8688d52008-03-03 12:59:56 -08001920 "0x%016" PRIx64 ", base_address=0x%0lx.\n", __func__,
Radim Krčmář6e500432016-12-15 18:06:46 +01001921 vcpu, kvm_lapic_get_reg(apic, APIC_ID),
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001922 vcpu->arch.apic_base, apic->base_address);
Eddie Dong97222cc2007-09-12 10:58:04 +03001923}
1924
Eddie Dong97222cc2007-09-12 10:58:04 +03001925/*
1926 *----------------------------------------------------------------------
1927 * timer interface
1928 *----------------------------------------------------------------------
1929 */
Eddie Dong1b9778d2007-09-03 16:56:58 +03001930
Avi Kivity2a6eac92012-07-26 18:01:51 +03001931static bool lapic_is_periodic(struct kvm_lapic *apic)
Eddie Dong97222cc2007-09-12 10:58:04 +03001932{
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03001933 return apic_lvtt_period(apic);
Eddie Dong97222cc2007-09-12 10:58:04 +03001934}
1935
Marcelo Tosatti3d808402008-04-11 14:53:26 -03001936int apic_has_pending_timer(struct kvm_vcpu *vcpu)
1937{
Gleb Natapov54e98182012-08-05 15:58:32 +03001938 struct kvm_lapic *apic = vcpu->arch.apic;
Marcelo Tosatti3d808402008-04-11 14:53:26 -03001939
Paolo Bonzini1e3161b42016-01-08 13:41:16 +01001940 if (apic_enabled(apic) && apic_lvt_enabled(apic, APIC_LVTT))
Gleb Natapov54e98182012-08-05 15:58:32 +03001941 return atomic_read(&apic->lapic_timer.pending);
Marcelo Tosatti3d808402008-04-11 14:53:26 -03001942
1943 return 0;
1944}
1945
Avi Kivity89342082011-11-10 14:57:21 +02001946int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type)
Eddie Dong1b9778d2007-09-03 16:56:58 +03001947{
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05001948 u32 reg = kvm_lapic_get_reg(apic, lvt_type);
Jan Kiszka23930f92008-09-26 09:30:52 +02001949 int vector, mode, trig_mode;
Eddie Dong1b9778d2007-09-03 16:56:58 +03001950
Gleb Natapovc48f1492012-08-05 15:58:33 +03001951 if (kvm_apic_hw_enabled(apic) && !(reg & APIC_LVT_MASKED)) {
Jan Kiszka23930f92008-09-26 09:30:52 +02001952 vector = reg & APIC_VECTOR_MASK;
1953 mode = reg & APIC_MODE_MASK;
1954 trig_mode = reg & APIC_LVT_LEVEL_TRIGGER;
Yang Zhangb4f22252013-04-11 19:21:37 +08001955 return __apic_accept_irq(apic, mode, vector, 1, trig_mode,
1956 NULL);
Jan Kiszka23930f92008-09-26 09:30:52 +02001957 }
1958 return 0;
1959}
1960
Jan Kiszka8fdb2352008-10-20 10:20:02 +02001961void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu)
Jan Kiszka23930f92008-09-26 09:30:52 +02001962{
Jan Kiszka8fdb2352008-10-20 10:20:02 +02001963 struct kvm_lapic *apic = vcpu->arch.apic;
1964
1965 if (apic)
1966 kvm_apic_local_deliver(apic, APIC_LVT0);
Eddie Dong1b9778d2007-09-03 16:56:58 +03001967}
1968
Gregory Haskinsd76685c2009-06-01 12:54:50 -04001969static const struct kvm_io_device_ops apic_mmio_ops = {
1970 .read = apic_mmio_read,
1971 .write = apic_mmio_write,
Gregory Haskinsd76685c2009-06-01 12:54:50 -04001972};
1973
Avi Kivitye9d90d42012-07-26 18:01:50 +03001974static enum hrtimer_restart apic_timer_fn(struct hrtimer *data)
1975{
1976 struct kvm_timer *ktimer = container_of(data, struct kvm_timer, timer);
Avi Kivity2a6eac92012-07-26 18:01:51 +03001977 struct kvm_lapic *apic = container_of(ktimer, struct kvm_lapic, lapic_timer);
Avi Kivitye9d90d42012-07-26 18:01:50 +03001978
Radim Krčmář5d87db72014-10-10 19:15:08 +02001979 apic_timer_expired(apic);
Avi Kivitye9d90d42012-07-26 18:01:50 +03001980
Avi Kivity2a6eac92012-07-26 18:01:51 +03001981 if (lapic_is_periodic(apic)) {
Wanpeng Li8003c9a2016-10-24 18:23:13 +08001982 advance_periodic_target_expiration(apic);
Avi Kivitye9d90d42012-07-26 18:01:50 +03001983 hrtimer_add_expires_ns(&ktimer->timer, ktimer->period);
1984 return HRTIMER_RESTART;
1985 } else
1986 return HRTIMER_NORESTART;
1987}
1988
Eddie Dong97222cc2007-09-12 10:58:04 +03001989int kvm_create_lapic(struct kvm_vcpu *vcpu)
1990{
1991 struct kvm_lapic *apic;
1992
1993 ASSERT(vcpu != NULL);
1994 apic_debug("apic_init %d\n", vcpu->vcpu_id);
1995
1996 apic = kzalloc(sizeof(*apic), GFP_KERNEL);
1997 if (!apic)
1998 goto nomem;
1999
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002000 vcpu->arch.apic = apic;
Eddie Dong97222cc2007-09-12 10:58:04 +03002001
Takuya Yoshikawaafc20182011-03-05 12:40:20 +09002002 apic->regs = (void *)get_zeroed_page(GFP_KERNEL);
2003 if (!apic->regs) {
Eddie Dong97222cc2007-09-12 10:58:04 +03002004 printk(KERN_ERR "malloc apic regs error for vcpu %x\n",
2005 vcpu->vcpu_id);
Rusty Russelld5894442007-10-08 10:48:30 +10002006 goto nomem_free_apic;
Eddie Dong97222cc2007-09-12 10:58:04 +03002007 }
Eddie Dong97222cc2007-09-12 10:58:04 +03002008 apic->vcpu = vcpu;
2009
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03002010 hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC,
Luiz Capitulino61abdbe2016-04-04 16:46:07 -04002011 HRTIMER_MODE_ABS_PINNED);
Avi Kivitye9d90d42012-07-26 18:01:50 +03002012 apic->lapic_timer.timer.function = apic_timer_fn;
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03002013
Gleb Natapovc5cc4212012-08-05 15:58:30 +03002014 /*
2015 * APIC is created enabled. This will prevent kvm_lapic_set_base from
2016 * thinking that APIC satet has changed.
2017 */
2018 vcpu->arch.apic_base = MSR_IA32_APICBASE_ENABLE;
Gleb Natapovf8c1ea12012-08-05 15:58:31 +03002019 static_key_slow_inc(&apic_sw_disabled.key); /* sw disabled at reset */
Nadav Amitd28bc9d2015-04-13 14:34:08 +03002020 kvm_lapic_reset(vcpu, false);
Gregory Haskinsd76685c2009-06-01 12:54:50 -04002021 kvm_iodevice_init(&apic->dev, &apic_mmio_ops);
Eddie Dong97222cc2007-09-12 10:58:04 +03002022
2023 return 0;
Rusty Russelld5894442007-10-08 10:48:30 +10002024nomem_free_apic:
2025 kfree(apic);
Eddie Dong97222cc2007-09-12 10:58:04 +03002026nomem:
Eddie Dong97222cc2007-09-12 10:58:04 +03002027 return -ENOMEM;
2028}
Eddie Dong97222cc2007-09-12 10:58:04 +03002029
2030int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu)
2031{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002032 struct kvm_lapic *apic = vcpu->arch.apic;
Eddie Dong97222cc2007-09-12 10:58:04 +03002033 int highest_irr;
2034
Paolo Bonzinif8543d62016-01-08 13:42:24 +01002035 if (!apic_enabled(apic))
Eddie Dong97222cc2007-09-12 10:58:04 +03002036 return -1;
2037
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002038 apic_update_ppr(apic);
Eddie Dong97222cc2007-09-12 10:58:04 +03002039 highest_irr = apic_find_highest_irr(apic);
2040 if ((highest_irr == -1) ||
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05002041 ((highest_irr & 0xF0) <= kvm_lapic_get_reg(apic, APIC_PROCPRI)))
Eddie Dong97222cc2007-09-12 10:58:04 +03002042 return -1;
2043 return highest_irr;
2044}
2045
Qing He40487c62007-09-17 14:47:13 +08002046int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu)
2047{
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05002048 u32 lvt0 = kvm_lapic_get_reg(vcpu->arch.apic, APIC_LVT0);
Qing He40487c62007-09-17 14:47:13 +08002049 int r = 0;
2050
Gleb Natapovc48f1492012-08-05 15:58:33 +03002051 if (!kvm_apic_hw_enabled(vcpu->arch.apic))
Chris Lalancettee7dca5c2010-06-16 17:11:12 -04002052 r = 1;
2053 if ((lvt0 & APIC_LVT_MASKED) == 0 &&
2054 GET_APIC_DELIVERY_MODE(lvt0) == APIC_MODE_EXTINT)
2055 r = 1;
Qing He40487c62007-09-17 14:47:13 +08002056 return r;
2057}
2058
Eddie Dong1b9778d2007-09-03 16:56:58 +03002059void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu)
2060{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002061 struct kvm_lapic *apic = vcpu->arch.apic;
Eddie Dong1b9778d2007-09-03 16:56:58 +03002062
Gleb Natapov54e98182012-08-05 15:58:32 +03002063 if (atomic_read(&apic->lapic_timer.pending) > 0) {
Jan Kiszkaf1ed0452013-04-28 14:00:41 +02002064 kvm_apic_local_deliver(apic, APIC_LVTT);
Nadav Amitfae0ba22014-08-18 22:42:13 +03002065 if (apic_lvtt_tscdeadline(apic))
2066 apic->lapic_timer.tscdeadline = 0;
Wanpeng Li8003c9a2016-10-24 18:23:13 +08002067 if (apic_lvtt_oneshot(apic)) {
2068 apic->lapic_timer.tscdeadline = 0;
Thomas Gleixner8b0e1952016-12-25 12:30:41 +01002069 apic->lapic_timer.target_expiration = 0;
Wanpeng Li8003c9a2016-10-24 18:23:13 +08002070 }
Jan Kiszkaf1ed0452013-04-28 14:00:41 +02002071 atomic_set(&apic->lapic_timer.pending, 0);
Eddie Dong1b9778d2007-09-03 16:56:58 +03002072 }
2073}
2074
Eddie Dong97222cc2007-09-12 10:58:04 +03002075int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu)
2076{
2077 int vector = kvm_apic_has_interrupt(vcpu);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002078 struct kvm_lapic *apic = vcpu->arch.apic;
Eddie Dong97222cc2007-09-12 10:58:04 +03002079
2080 if (vector == -1)
2081 return -1;
2082
Wanpeng Li56cc2402014-08-05 12:42:24 +08002083 /*
2084 * We get here even with APIC virtualization enabled, if doing
2085 * nested virtualization and L1 runs with the "acknowledge interrupt
2086 * on exit" mode. Then we cannot inject the interrupt via RVI,
2087 * because the process would deliver it through the IDT.
2088 */
2089
Michael S. Tsirkin8680b942012-06-24 19:24:26 +03002090 apic_set_isr(vector, apic);
Eddie Dong97222cc2007-09-12 10:58:04 +03002091 apic_update_ppr(apic);
2092 apic_clear_irr(vector, apic);
Andrey Smetanin5c9194122015-11-10 15:36:34 +03002093
2094 if (test_bit(vector, vcpu_to_synic(vcpu)->auto_eoi_bitmap)) {
2095 apic_clear_isr(vector, apic);
2096 apic_update_ppr(apic);
2097 }
2098
Eddie Dong97222cc2007-09-12 10:58:04 +03002099 return vector;
2100}
Eddie Dong96ad2cc2007-09-06 12:22:56 +03002101
Radim Krčmářa92e2542016-07-12 22:09:22 +02002102static int kvm_apic_state_fixup(struct kvm_vcpu *vcpu,
2103 struct kvm_lapic_state *s, bool set)
2104{
2105 if (apic_x2apic_mode(vcpu->arch.apic)) {
2106 u32 *id = (u32 *)(s->regs + APIC_ID);
2107
Radim Krčmář371313132016-07-12 22:09:27 +02002108 if (vcpu->kvm->arch.x2apic_format) {
2109 if (*id != vcpu->vcpu_id)
2110 return -EINVAL;
2111 } else {
2112 if (set)
2113 *id >>= 24;
2114 else
2115 *id <<= 24;
2116 }
Radim Krčmářa92e2542016-07-12 22:09:22 +02002117 }
2118
2119 return 0;
2120}
2121
2122int kvm_apic_get_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s)
2123{
2124 memcpy(s->regs, vcpu->arch.apic->regs, sizeof(*s));
2125 return kvm_apic_state_fixup(vcpu, s, false);
2126}
2127
2128int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s)
Eddie Dong96ad2cc2007-09-06 12:22:56 +03002129{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002130 struct kvm_lapic *apic = vcpu->arch.apic;
Radim Krčmářa92e2542016-07-12 22:09:22 +02002131 int r;
2132
Eddie Dong96ad2cc2007-09-06 12:22:56 +03002133
Gleb Natapov5dbc8f32012-08-05 15:58:27 +03002134 kvm_lapic_set_base(vcpu, vcpu->arch.apic_base);
Gleb Natapov64eb0622012-08-08 15:24:36 +03002135 /* set SPIV separately to get count of SW disabled APICs right */
2136 apic_set_spiv(apic, *((u32 *)(s->regs + APIC_SPIV)));
Radim Krčmářa92e2542016-07-12 22:09:22 +02002137
2138 r = kvm_apic_state_fixup(vcpu, s, true);
2139 if (r)
2140 return r;
Gleb Natapov64eb0622012-08-08 15:24:36 +03002141 memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s);
Radim Krčmářa92e2542016-07-12 22:09:22 +02002142
2143 recalculate_apic_map(vcpu->kvm);
Gleb Natapovfc61b802009-07-05 17:39:35 +03002144 kvm_apic_set_version(vcpu);
2145
Eddie Dong96ad2cc2007-09-06 12:22:56 +03002146 apic_update_ppr(apic);
Marcelo Tosattid3c7b772009-02-23 10:57:41 -03002147 hrtimer_cancel(&apic->lapic_timer.timer);
Radim Krčmářb6ac0692015-06-05 20:57:41 +02002148 apic_update_lvtt(apic);
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05002149 apic_manage_nmi_watchdog(apic, kvm_lapic_get_reg(apic, APIC_LVT0));
Eddie Dong96ad2cc2007-09-06 12:22:56 +03002150 update_divide_count(apic);
2151 start_apic_timer(apic);
Marcelo Tosatti6e24a6e2009-12-14 17:37:35 -02002152 apic->irr_pending = true;
Andrey Smetanind62caab2015-11-10 15:36:33 +03002153 apic->isr_count = vcpu->arch.apicv_active ?
Yang Zhangc7c9c562013-01-25 10:18:51 +08002154 1 : count_vectors(apic->regs + APIC_ISR);
Michael S. Tsirkin8680b942012-06-24 19:24:26 +03002155 apic->highest_isr_cache = -1;
Andrey Smetanind62caab2015-11-10 15:36:33 +03002156 if (vcpu->arch.apicv_active) {
Suravee Suthikulpanitbe8ca172016-05-04 14:09:49 -05002157 if (kvm_x86_ops->apicv_post_state_restore)
2158 kvm_x86_ops->apicv_post_state_restore(vcpu);
Wei Wang4114c272014-11-05 10:53:43 +08002159 kvm_x86_ops->hwapic_irr_update(vcpu,
2160 apic_find_highest_irr(apic));
Paolo Bonzini67c9ddd2016-05-10 17:01:23 +02002161 kvm_x86_ops->hwapic_isr_update(vcpu,
Tiejun Chenb4eef9b2014-12-22 10:32:57 +01002162 apic_find_highest_isr(apic));
Andrey Smetanind62caab2015-11-10 15:36:33 +03002163 }
Avi Kivity3842d132010-07-27 12:30:24 +03002164 kvm_make_request(KVM_REQ_EVENT, vcpu);
Steve Rutherford49df6392015-07-29 23:21:40 -07002165 if (ioapic_in_kernel(vcpu->kvm))
2166 kvm_rtc_eoi_tracking_restore_one(vcpu);
Radim Krčmář0669a512015-10-30 15:48:20 +01002167
2168 vcpu->arch.apic_arb_prio = 0;
Radim Krčmářa92e2542016-07-12 22:09:22 +02002169
2170 return 0;
Eddie Dong96ad2cc2007-09-06 12:22:56 +03002171}
Eddie Donga3d7f852007-09-03 16:15:12 +03002172
Avi Kivity2f52d582008-01-16 12:49:30 +02002173void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu)
Eddie Donga3d7f852007-09-03 16:15:12 +03002174{
Eddie Donga3d7f852007-09-03 16:15:12 +03002175 struct hrtimer *timer;
2176
Paolo Bonzinibce87cc2016-01-08 13:48:51 +01002177 if (!lapic_in_kernel(vcpu))
Eddie Donga3d7f852007-09-03 16:15:12 +03002178 return;
2179
Gleb Natapov54e98182012-08-05 15:58:32 +03002180 timer = &vcpu->arch.apic->lapic_timer.timer;
Eddie Donga3d7f852007-09-03 16:15:12 +03002181 if (hrtimer_cancel(timer))
Luiz Capitulino61abdbe2016-04-04 16:46:07 -04002182 hrtimer_start_expires(timer, HRTIMER_MODE_ABS_PINNED);
Eddie Donga3d7f852007-09-03 16:15:12 +03002183}
Avi Kivityb93463a2007-10-25 16:52:32 +02002184
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03002185/*
2186 * apic_sync_pv_eoi_from_guest - called on vmexit or cancel interrupt
2187 *
2188 * Detect whether guest triggered PV EOI since the
2189 * last entry. If yes, set EOI on guests's behalf.
2190 * Clear PV EOI in guest memory in any case.
2191 */
2192static void apic_sync_pv_eoi_from_guest(struct kvm_vcpu *vcpu,
2193 struct kvm_lapic *apic)
2194{
2195 bool pending;
2196 int vector;
2197 /*
2198 * PV EOI state is derived from KVM_APIC_PV_EOI_PENDING in host
2199 * and KVM_PV_EOI_ENABLED in guest memory as follows:
2200 *
2201 * KVM_APIC_PV_EOI_PENDING is unset:
2202 * -> host disabled PV EOI.
2203 * KVM_APIC_PV_EOI_PENDING is set, KVM_PV_EOI_ENABLED is set:
2204 * -> host enabled PV EOI, guest did not execute EOI yet.
2205 * KVM_APIC_PV_EOI_PENDING is set, KVM_PV_EOI_ENABLED is unset:
2206 * -> host enabled PV EOI, guest executed EOI.
2207 */
2208 BUG_ON(!pv_eoi_enabled(vcpu));
2209 pending = pv_eoi_get_pending(vcpu);
2210 /*
2211 * Clear pending bit in any case: it will be set again on vmentry.
2212 * While this might not be ideal from performance point of view,
2213 * this makes sure pv eoi is only enabled when we know it's safe.
2214 */
2215 pv_eoi_clr_pending(vcpu);
2216 if (pending)
2217 return;
2218 vector = apic_set_eoi(apic);
2219 trace_kvm_pv_eoi(apic, vector);
2220}
2221
Avi Kivityb93463a2007-10-25 16:52:32 +02002222void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu)
2223{
2224 u32 data;
Avi Kivityb93463a2007-10-25 16:52:32 +02002225
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03002226 if (test_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention))
2227 apic_sync_pv_eoi_from_guest(vcpu, vcpu->arch.apic);
2228
Gleb Natapov41383772012-04-19 14:06:29 +03002229 if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention))
Avi Kivityb93463a2007-10-25 16:52:32 +02002230 return;
2231
Nicholas Krause603242a2015-08-05 10:44:40 -04002232 if (kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.apic->vapic_cache, &data,
2233 sizeof(u32)))
2234 return;
Avi Kivityb93463a2007-10-25 16:52:32 +02002235
2236 apic_set_tpr(vcpu->arch.apic, data & 0xff);
2237}
2238
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03002239/*
2240 * apic_sync_pv_eoi_to_guest - called before vmentry
2241 *
2242 * Detect whether it's safe to enable PV EOI and
2243 * if yes do so.
2244 */
2245static void apic_sync_pv_eoi_to_guest(struct kvm_vcpu *vcpu,
2246 struct kvm_lapic *apic)
2247{
2248 if (!pv_eoi_enabled(vcpu) ||
2249 /* IRR set or many bits in ISR: could be nested. */
2250 apic->irr_pending ||
2251 /* Cache not set: could be safe but we don't bother. */
2252 apic->highest_isr_cache == -1 ||
2253 /* Need EOI to update ioapic. */
Paolo Bonzini3bb345f2015-07-29 10:43:18 +02002254 kvm_ioapic_handles_vector(apic, apic->highest_isr_cache)) {
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03002255 /*
2256 * PV EOI was disabled by apic_sync_pv_eoi_from_guest
2257 * so we need not do anything here.
2258 */
2259 return;
2260 }
2261
2262 pv_eoi_set_pending(apic->vcpu);
2263}
2264
Avi Kivityb93463a2007-10-25 16:52:32 +02002265void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu)
2266{
2267 u32 data, tpr;
2268 int max_irr, max_isr;
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03002269 struct kvm_lapic *apic = vcpu->arch.apic;
Avi Kivityb93463a2007-10-25 16:52:32 +02002270
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03002271 apic_sync_pv_eoi_to_guest(vcpu, apic);
2272
Gleb Natapov41383772012-04-19 14:06:29 +03002273 if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention))
Avi Kivityb93463a2007-10-25 16:52:32 +02002274 return;
2275
Suravee Suthikulpanitdfb95952016-05-04 14:09:41 -05002276 tpr = kvm_lapic_get_reg(apic, APIC_TASKPRI) & 0xff;
Avi Kivityb93463a2007-10-25 16:52:32 +02002277 max_irr = apic_find_highest_irr(apic);
2278 if (max_irr < 0)
2279 max_irr = 0;
2280 max_isr = apic_find_highest_isr(apic);
2281 if (max_isr < 0)
2282 max_isr = 0;
2283 data = (tpr & 0xff) | ((max_isr & 0xf0) << 8) | (max_irr << 24);
2284
Andy Honigfda4e2e2013-11-20 10:23:22 -08002285 kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apic->vapic_cache, &data,
2286 sizeof(u32));
Avi Kivityb93463a2007-10-25 16:52:32 +02002287}
2288
Andy Honigfda4e2e2013-11-20 10:23:22 -08002289int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr)
Avi Kivityb93463a2007-10-25 16:52:32 +02002290{
Andy Honigfda4e2e2013-11-20 10:23:22 -08002291 if (vapic_addr) {
2292 if (kvm_gfn_to_hva_cache_init(vcpu->kvm,
2293 &vcpu->arch.apic->vapic_cache,
2294 vapic_addr, sizeof(u32)))
2295 return -EINVAL;
Gleb Natapov41383772012-04-19 14:06:29 +03002296 __set_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention);
Andy Honigfda4e2e2013-11-20 10:23:22 -08002297 } else {
Gleb Natapov41383772012-04-19 14:06:29 +03002298 __clear_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention);
Andy Honigfda4e2e2013-11-20 10:23:22 -08002299 }
2300
2301 vcpu->arch.apic->vapic_addr = vapic_addr;
2302 return 0;
Avi Kivityb93463a2007-10-25 16:52:32 +02002303}
Gleb Natapov0105d1a2009-07-05 17:39:36 +03002304
2305int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data)
2306{
2307 struct kvm_lapic *apic = vcpu->arch.apic;
2308 u32 reg = (msr - APIC_BASE_MSR) << 4;
2309
Paolo Bonzini35754c92015-07-29 12:05:37 +02002310 if (!lapic_in_kernel(vcpu) || !apic_x2apic_mode(apic))
Gleb Natapov0105d1a2009-07-05 17:39:36 +03002311 return 1;
2312
Nadav Amitc69d3d92014-11-26 17:56:25 +02002313 if (reg == APIC_ICR2)
2314 return 1;
2315
Gleb Natapov0105d1a2009-07-05 17:39:36 +03002316 /* if this is ICR write vector before command */
Radim Krčmářdecdc282014-11-26 17:07:05 +01002317 if (reg == APIC_ICR)
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05002318 kvm_lapic_reg_write(apic, APIC_ICR2, (u32)(data >> 32));
2319 return kvm_lapic_reg_write(apic, reg, (u32)data);
Gleb Natapov0105d1a2009-07-05 17:39:36 +03002320}
2321
2322int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data)
2323{
2324 struct kvm_lapic *apic = vcpu->arch.apic;
2325 u32 reg = (msr - APIC_BASE_MSR) << 4, low, high = 0;
2326
Paolo Bonzini35754c92015-07-29 12:05:37 +02002327 if (!lapic_in_kernel(vcpu) || !apic_x2apic_mode(apic))
Gleb Natapov0105d1a2009-07-05 17:39:36 +03002328 return 1;
2329
Nadav Amitc69d3d92014-11-26 17:56:25 +02002330 if (reg == APIC_DFR || reg == APIC_ICR2) {
2331 apic_debug("KVM_APIC_READ: read x2apic reserved register %x\n",
2332 reg);
2333 return 1;
2334 }
2335
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05002336 if (kvm_lapic_reg_read(apic, reg, 4, &low))
Gleb Natapov0105d1a2009-07-05 17:39:36 +03002337 return 1;
Radim Krčmářdecdc282014-11-26 17:07:05 +01002338 if (reg == APIC_ICR)
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05002339 kvm_lapic_reg_read(apic, APIC_ICR2, 4, &high);
Gleb Natapov0105d1a2009-07-05 17:39:36 +03002340
2341 *data = (((u64)high) << 32) | low;
2342
2343 return 0;
2344}
Gleb Natapov10388a02010-01-17 15:51:23 +02002345
2346int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 reg, u64 data)
2347{
2348 struct kvm_lapic *apic = vcpu->arch.apic;
2349
Paolo Bonzinibce87cc2016-01-08 13:48:51 +01002350 if (!lapic_in_kernel(vcpu))
Gleb Natapov10388a02010-01-17 15:51:23 +02002351 return 1;
2352
2353 /* if this is ICR write vector before command */
2354 if (reg == APIC_ICR)
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05002355 kvm_lapic_reg_write(apic, APIC_ICR2, (u32)(data >> 32));
2356 return kvm_lapic_reg_write(apic, reg, (u32)data);
Gleb Natapov10388a02010-01-17 15:51:23 +02002357}
2358
2359int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 reg, u64 *data)
2360{
2361 struct kvm_lapic *apic = vcpu->arch.apic;
2362 u32 low, high = 0;
2363
Paolo Bonzinibce87cc2016-01-08 13:48:51 +01002364 if (!lapic_in_kernel(vcpu))
Gleb Natapov10388a02010-01-17 15:51:23 +02002365 return 1;
2366
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05002367 if (kvm_lapic_reg_read(apic, reg, 4, &low))
Gleb Natapov10388a02010-01-17 15:51:23 +02002368 return 1;
2369 if (reg == APIC_ICR)
Suravee Suthikulpanit1e6e2752016-05-04 14:09:40 -05002370 kvm_lapic_reg_read(apic, APIC_ICR2, 4, &high);
Gleb Natapov10388a02010-01-17 15:51:23 +02002371
2372 *data = (((u64)high) << 32) | low;
2373
2374 return 0;
2375}
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03002376
2377int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data)
2378{
2379 u64 addr = data & ~KVM_MSR_ENABLED;
2380 if (!IS_ALIGNED(addr, 4))
2381 return 1;
2382
2383 vcpu->arch.pv_eoi.msr_val = data;
2384 if (!pv_eoi_enabled(vcpu))
2385 return 0;
2386 return kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.pv_eoi.data,
Andrew Honig8f964522013-03-29 09:35:21 -07002387 addr, sizeof(u8));
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03002388}
Gleb Natapovc5cc4212012-08-05 15:58:30 +03002389
Jan Kiszka66450a22013-03-13 12:42:34 +01002390void kvm_apic_accept_events(struct kvm_vcpu *vcpu)
2391{
2392 struct kvm_lapic *apic = vcpu->arch.apic;
Paolo Bonzini2b4a2732014-11-24 14:35:24 +01002393 u8 sipi_vector;
Gleb Natapov299018f2013-06-03 11:30:02 +03002394 unsigned long pe;
Jan Kiszka66450a22013-03-13 12:42:34 +01002395
Paolo Bonzinibce87cc2016-01-08 13:48:51 +01002396 if (!lapic_in_kernel(vcpu) || !apic->pending_events)
Jan Kiszka66450a22013-03-13 12:42:34 +01002397 return;
2398
Paolo Bonzinicd7764f2015-06-04 10:41:21 +02002399 /*
2400 * INITs are latched while in SMM. Because an SMM CPU cannot
2401 * be in KVM_MP_STATE_INIT_RECEIVED state, just eat SIPIs
2402 * and delay processing of INIT until the next RSM.
2403 */
2404 if (is_smm(vcpu)) {
2405 WARN_ON_ONCE(vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED);
2406 if (test_bit(KVM_APIC_SIPI, &apic->pending_events))
2407 clear_bit(KVM_APIC_SIPI, &apic->pending_events);
2408 return;
2409 }
Gleb Natapov299018f2013-06-03 11:30:02 +03002410
Paolo Bonzinicd7764f2015-06-04 10:41:21 +02002411 pe = xchg(&apic->pending_events, 0);
Gleb Natapov299018f2013-06-03 11:30:02 +03002412 if (test_bit(KVM_APIC_INIT, &pe)) {
Nadav Amitd28bc9d2015-04-13 14:34:08 +03002413 kvm_lapic_reset(vcpu, true);
2414 kvm_vcpu_reset(vcpu, true);
Jan Kiszka66450a22013-03-13 12:42:34 +01002415 if (kvm_vcpu_is_bsp(apic->vcpu))
2416 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
2417 else
2418 vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED;
2419 }
Gleb Natapov299018f2013-06-03 11:30:02 +03002420 if (test_bit(KVM_APIC_SIPI, &pe) &&
Jan Kiszka66450a22013-03-13 12:42:34 +01002421 vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) {
2422 /* evaluate pending_events before reading the vector */
2423 smp_rmb();
2424 sipi_vector = apic->sipi_vector;
Nadav Amit98eff522014-06-29 12:28:51 +03002425 apic_debug("vcpu %d received sipi with vector # %x\n",
Jan Kiszka66450a22013-03-13 12:42:34 +01002426 vcpu->vcpu_id, sipi_vector);
2427 kvm_vcpu_deliver_sipi_vector(vcpu, sipi_vector);
2428 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
2429 }
2430}
2431
Gleb Natapovc5cc4212012-08-05 15:58:30 +03002432void kvm_lapic_init(void)
2433{
2434 /* do not patch jump label more than once per second */
2435 jump_label_rate_limit(&apic_hw_disabled, HZ);
Gleb Natapovf8c1ea12012-08-05 15:58:31 +03002436 jump_label_rate_limit(&apic_sw_disabled, HZ);
Gleb Natapovc5cc4212012-08-05 15:58:30 +03002437}