Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Local APIC virtualization |
| 4 | * |
| 5 | * Copyright (C) 2006 Qumranet, Inc. |
| 6 | * Copyright (C) 2007 Novell |
| 7 | * Copyright (C) 2007 Intel |
Nicolas Kaiser | 9611c18 | 2010-10-06 14:23:22 +0200 | [diff] [blame] | 8 | * Copyright 2009 Red Hat, Inc. and/or its affiliates. |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 9 | * |
| 10 | * Authors: |
| 11 | * Dor Laor <dor.laor@qumranet.com> |
| 12 | * Gregory Haskins <ghaskins@novell.com> |
| 13 | * Yaozu (Eddie) Dong <eddie.dong@intel.com> |
| 14 | * |
| 15 | * Based on Xen 3.1 code, Copyright (c) 2004, Intel Corporation. |
| 16 | * |
| 17 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 18 | * the COPYING file in the top-level directory. |
| 19 | */ |
| 20 | |
Avi Kivity | edf8841 | 2007-12-16 11:02:48 +0200 | [diff] [blame] | 21 | #include <linux/kvm_host.h> |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 22 | #include <linux/kvm.h> |
| 23 | #include <linux/mm.h> |
| 24 | #include <linux/highmem.h> |
| 25 | #include <linux/smp.h> |
| 26 | #include <linux/hrtimer.h> |
| 27 | #include <linux/io.h> |
| 28 | #include <linux/module.h> |
Roman Zippel | 6f6d6a1 | 2008-05-01 04:34:28 -0700 | [diff] [blame] | 29 | #include <linux/math64.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 30 | #include <linux/slab.h> |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 31 | #include <asm/processor.h> |
| 32 | #include <asm/msr.h> |
| 33 | #include <asm/page.h> |
| 34 | #include <asm/current.h> |
| 35 | #include <asm/apicdef.h> |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 36 | #include <asm/delay.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 37 | #include <linux/atomic.h> |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 38 | #include <linux/jump_label.h> |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 39 | #include "kvm_cache_regs.h" |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 40 | #include "irq.h" |
Marcelo Tosatti | 229456f | 2009-06-17 09:22:14 -0300 | [diff] [blame] | 41 | #include "trace.h" |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 42 | #include "x86.h" |
Avi Kivity | 00b27a3 | 2011-11-23 16:30:32 +0200 | [diff] [blame] | 43 | #include "cpuid.h" |
Andrey Smetanin | 5c919412 | 2015-11-10 15:36:34 +0300 | [diff] [blame] | 44 | #include "hyperv.h" |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 45 | |
Marcelo Tosatti | b682b81 | 2009-02-10 20:41:41 -0200 | [diff] [blame] | 46 | #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 Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 52 | #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 | |
| 62 | #define APIC_LVT_NUM 6 |
| 63 | /* 14 is the version for Xeon and Pentium 8.4.8*/ |
| 64 | #define APIC_VERSION (0x14UL | ((APIC_LVT_NUM - 1) << 16)) |
| 65 | #define LAPIC_MMIO_LENGTH (1 << 12) |
| 66 | /* followed define is not in apicdef.h */ |
| 67 | #define APIC_SHORT_MASK 0xc0000 |
| 68 | #define APIC_DEST_NOSHORT 0x0 |
| 69 | #define APIC_DEST_MASK 0x800 |
| 70 | #define MAX_APIC_VECTOR 256 |
Takuya Yoshikawa | ecba9a5 | 2012-09-05 19:30:01 +0900 | [diff] [blame] | 71 | #define APIC_VECTORS_PER_REG 32 |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 72 | |
Nadav Amit | 394457a | 2014-10-03 00:30:52 +0300 | [diff] [blame] | 73 | #define APIC_BROADCAST 0xFF |
| 74 | #define X2APIC_BROADCAST 0xFFFFFFFFul |
| 75 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 76 | #define VEC_POS(v) ((v) & (32 - 1)) |
| 77 | #define REG_POS(v) (((v) >> 5) << 4) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 78 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 79 | static inline void apic_set_reg(struct kvm_lapic *apic, int reg_off, u32 val) |
| 80 | { |
| 81 | *((u32 *) (apic->regs + reg_off)) = val; |
| 82 | } |
| 83 | |
Michael S. Tsirkin | a0c9a822 | 2012-04-11 18:49:55 +0300 | [diff] [blame] | 84 | static inline int apic_test_vector(int vec, void *bitmap) |
| 85 | { |
| 86 | return test_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 87 | } |
| 88 | |
Yang Zhang | 1060691 | 2013-04-11 19:21:38 +0800 | [diff] [blame] | 89 | bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector) |
| 90 | { |
| 91 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 92 | |
| 93 | return apic_test_vector(vector, apic->regs + APIC_ISR) || |
| 94 | apic_test_vector(vector, apic->regs + APIC_IRR); |
| 95 | } |
| 96 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 97 | static inline void apic_set_vector(int vec, void *bitmap) |
| 98 | { |
| 99 | set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 100 | } |
| 101 | |
| 102 | static inline void apic_clear_vector(int vec, void *bitmap) |
| 103 | { |
| 104 | clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 105 | } |
| 106 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 107 | static inline int __apic_test_and_set_vector(int vec, void *bitmap) |
| 108 | { |
| 109 | return __test_and_set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 110 | } |
| 111 | |
| 112 | static inline int __apic_test_and_clear_vector(int vec, void *bitmap) |
| 113 | { |
| 114 | return __test_and_clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 115 | } |
| 116 | |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 117 | struct static_key_deferred apic_hw_disabled __read_mostly; |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 118 | struct static_key_deferred apic_sw_disabled __read_mostly; |
| 119 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 120 | static inline int apic_enabled(struct kvm_lapic *apic) |
| 121 | { |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 122 | return kvm_apic_sw_enabled(apic) && kvm_apic_hw_enabled(apic); |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 123 | } |
| 124 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 125 | #define LVT_MASK \ |
| 126 | (APIC_LVT_MASKED | APIC_SEND_PENDING | APIC_VECTOR_MASK) |
| 127 | |
| 128 | #define LINT_MASK \ |
| 129 | (LVT_MASK | APIC_MODE_MASK | APIC_INPUT_POLARITY | \ |
| 130 | APIC_LVT_REMOTE_IRR | APIC_LVT_LEVEL_TRIGGER) |
| 131 | |
Radim Krčmář | 3548a25 | 2015-02-12 19:41:33 +0100 | [diff] [blame] | 132 | /* The logical map is definitely wrong if we have multiple |
| 133 | * modes at the same time. (Physical map is always right.) |
| 134 | */ |
| 135 | static inline bool kvm_apic_logical_map_valid(struct kvm_apic_map *map) |
| 136 | { |
| 137 | return !(map->mode & (map->mode - 1)); |
| 138 | } |
| 139 | |
Radim Krčmář | 3b5a5ff | 2015-02-12 19:41:34 +0100 | [diff] [blame] | 140 | static inline void |
| 141 | apic_logical_id(struct kvm_apic_map *map, u32 dest_id, u16 *cid, u16 *lid) |
| 142 | { |
| 143 | unsigned lid_bits; |
| 144 | |
| 145 | BUILD_BUG_ON(KVM_APIC_MODE_XAPIC_CLUSTER != 4); |
| 146 | BUILD_BUG_ON(KVM_APIC_MODE_XAPIC_FLAT != 8); |
| 147 | BUILD_BUG_ON(KVM_APIC_MODE_X2APIC != 16); |
| 148 | lid_bits = map->mode; |
| 149 | |
| 150 | *cid = dest_id >> lid_bits; |
| 151 | *lid = dest_id & ((1 << lid_bits) - 1); |
| 152 | } |
| 153 | |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 154 | static void recalculate_apic_map(struct kvm *kvm) |
| 155 | { |
| 156 | struct kvm_apic_map *new, *old = NULL; |
| 157 | struct kvm_vcpu *vcpu; |
| 158 | int i; |
| 159 | |
| 160 | new = kzalloc(sizeof(struct kvm_apic_map), GFP_KERNEL); |
| 161 | |
| 162 | mutex_lock(&kvm->arch.apic_map_lock); |
| 163 | |
| 164 | if (!new) |
| 165 | goto out; |
| 166 | |
Nadav Amit | 173beed | 2014-11-02 11:54:54 +0200 | [diff] [blame] | 167 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 168 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 169 | u16 cid, lid; |
Radim Krčmář | 25995e5 | 2014-11-27 23:30:19 +0100 | [diff] [blame] | 170 | u32 ldr, aid; |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 171 | |
Radim Krčmář | df04d1d | 2015-01-29 22:33:35 +0100 | [diff] [blame] | 172 | if (!kvm_apic_present(vcpu)) |
| 173 | continue; |
| 174 | |
Radim Krčmář | 25995e5 | 2014-11-27 23:30:19 +0100 | [diff] [blame] | 175 | aid = kvm_apic_id(apic); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 176 | ldr = kvm_apic_get_reg(apic, APIC_LDR); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 177 | |
Radim Krčmář | 25995e5 | 2014-11-27 23:30:19 +0100 | [diff] [blame] | 178 | if (aid < ARRAY_SIZE(new->phys_map)) |
| 179 | new->phys_map[aid] = apic; |
Radim Krčmář | 3548a25 | 2015-02-12 19:41:33 +0100 | [diff] [blame] | 180 | |
Radim Krčmář | 3b5a5ff | 2015-02-12 19:41:34 +0100 | [diff] [blame] | 181 | if (apic_x2apic_mode(apic)) { |
| 182 | new->mode |= KVM_APIC_MODE_X2APIC; |
| 183 | } else if (ldr) { |
| 184 | ldr = GET_APIC_LOGICAL_ID(ldr); |
| 185 | if (kvm_apic_get_reg(apic, APIC_DFR) == APIC_DFR_FLAT) |
| 186 | new->mode |= KVM_APIC_MODE_XAPIC_FLAT; |
| 187 | else |
| 188 | new->mode |= KVM_APIC_MODE_XAPIC_CLUSTER; |
| 189 | } |
| 190 | |
| 191 | if (!kvm_apic_logical_map_valid(new)) |
Radim Krčmář | 3548a25 | 2015-02-12 19:41:33 +0100 | [diff] [blame] | 192 | continue; |
| 193 | |
Radim Krčmář | 3b5a5ff | 2015-02-12 19:41:34 +0100 | [diff] [blame] | 194 | apic_logical_id(new, ldr, &cid, &lid); |
| 195 | |
Radim Krčmář | 25995e5 | 2014-11-27 23:30:19 +0100 | [diff] [blame] | 196 | if (lid && cid < ARRAY_SIZE(new->logical_map)) |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 197 | new->logical_map[cid][ffs(lid) - 1] = apic; |
| 198 | } |
| 199 | out: |
| 200 | old = rcu_dereference_protected(kvm->arch.apic_map, |
| 201 | lockdep_is_held(&kvm->arch.apic_map_lock)); |
| 202 | rcu_assign_pointer(kvm->arch.apic_map, new); |
| 203 | mutex_unlock(&kvm->arch.apic_map_lock); |
| 204 | |
| 205 | if (old) |
| 206 | kfree_rcu(old, rcu); |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 207 | |
Steve Rutherford | b053b2a | 2015-07-29 23:32:35 -0700 | [diff] [blame] | 208 | kvm_make_scan_ioapic_request(kvm); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 209 | } |
| 210 | |
Nadav Amit | 1e1b6c2 | 2014-08-19 00:03:00 +0300 | [diff] [blame] | 211 | static inline void apic_set_spiv(struct kvm_lapic *apic, u32 val) |
| 212 | { |
Radim Krčmář | e462755 | 2014-10-30 15:06:45 +0100 | [diff] [blame] | 213 | bool enabled = val & APIC_SPIV_APIC_ENABLED; |
Nadav Amit | 1e1b6c2 | 2014-08-19 00:03:00 +0300 | [diff] [blame] | 214 | |
| 215 | apic_set_reg(apic, APIC_SPIV, val); |
Radim Krčmář | e462755 | 2014-10-30 15:06:45 +0100 | [diff] [blame] | 216 | |
| 217 | if (enabled != apic->sw_enabled) { |
| 218 | apic->sw_enabled = enabled; |
| 219 | if (enabled) { |
Nadav Amit | 1e1b6c2 | 2014-08-19 00:03:00 +0300 | [diff] [blame] | 220 | static_key_slow_dec_deferred(&apic_sw_disabled); |
| 221 | recalculate_apic_map(apic->vcpu->kvm); |
| 222 | } else |
| 223 | static_key_slow_inc(&apic_sw_disabled.key); |
| 224 | } |
| 225 | } |
| 226 | |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 227 | static inline void kvm_apic_set_id(struct kvm_lapic *apic, u8 id) |
| 228 | { |
| 229 | apic_set_reg(apic, APIC_ID, id << 24); |
| 230 | recalculate_apic_map(apic->vcpu->kvm); |
| 231 | } |
| 232 | |
| 233 | static inline void kvm_apic_set_ldr(struct kvm_lapic *apic, u32 id) |
| 234 | { |
| 235 | apic_set_reg(apic, APIC_LDR, id); |
| 236 | recalculate_apic_map(apic->vcpu->kvm); |
| 237 | } |
| 238 | |
Radim Krčmář | 257b9a5 | 2015-05-22 18:45:11 +0200 | [diff] [blame] | 239 | static inline void kvm_apic_set_x2apic_id(struct kvm_lapic *apic, u8 id) |
| 240 | { |
| 241 | u32 ldr = ((id >> 4) << 16) | (1 << (id & 0xf)); |
| 242 | |
| 243 | apic_set_reg(apic, APIC_ID, id << 24); |
| 244 | apic_set_reg(apic, APIC_LDR, ldr); |
| 245 | recalculate_apic_map(apic->vcpu->kvm); |
| 246 | } |
| 247 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 248 | static inline int apic_lvt_enabled(struct kvm_lapic *apic, int lvt_type) |
| 249 | { |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 250 | return !(kvm_apic_get_reg(apic, lvt_type) & APIC_LVT_MASKED); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | static inline int apic_lvt_vector(struct kvm_lapic *apic, int lvt_type) |
| 254 | { |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 255 | return kvm_apic_get_reg(apic, lvt_type) & APIC_VECTOR_MASK; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 256 | } |
| 257 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 258 | static inline int apic_lvtt_oneshot(struct kvm_lapic *apic) |
| 259 | { |
Radim Krčmář | f30ebc3 | 2014-10-30 15:06:47 +0100 | [diff] [blame] | 260 | return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_ONESHOT; |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 261 | } |
| 262 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 263 | static inline int apic_lvtt_period(struct kvm_lapic *apic) |
| 264 | { |
Radim Krčmář | f30ebc3 | 2014-10-30 15:06:47 +0100 | [diff] [blame] | 265 | return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_PERIODIC; |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 266 | } |
| 267 | |
| 268 | static inline int apic_lvtt_tscdeadline(struct kvm_lapic *apic) |
| 269 | { |
Radim Krčmář | f30ebc3 | 2014-10-30 15:06:47 +0100 | [diff] [blame] | 270 | return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_TSCDEADLINE; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 271 | } |
| 272 | |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 273 | static inline int apic_lvt_nmi_mode(u32 lvt_val) |
| 274 | { |
| 275 | return (lvt_val & (APIC_MODE_MASK | APIC_LVT_MASKED)) == APIC_DM_NMI; |
| 276 | } |
| 277 | |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 278 | void kvm_apic_set_version(struct kvm_vcpu *vcpu) |
| 279 | { |
| 280 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 281 | struct kvm_cpuid_entry2 *feat; |
| 282 | u32 v = APIC_VERSION; |
| 283 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 284 | if (!lapic_in_kernel(vcpu)) |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 285 | return; |
| 286 | |
| 287 | feat = kvm_find_cpuid_entry(apic->vcpu, 0x1, 0); |
| 288 | if (feat && (feat->ecx & (1 << (X86_FEATURE_X2APIC & 31)))) |
| 289 | v |= APIC_LVR_DIRECTED_EOI; |
| 290 | apic_set_reg(apic, APIC_LVR, v); |
| 291 | } |
| 292 | |
Mathias Krause | f1d2483 | 2012-08-30 01:30:18 +0200 | [diff] [blame] | 293 | static const unsigned int apic_lvt_mask[APIC_LVT_NUM] = { |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 294 | LVT_MASK , /* part LVTT mask, timer mode mask added at runtime */ |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 295 | LVT_MASK | APIC_MODE_MASK, /* LVTTHMR */ |
| 296 | LVT_MASK | APIC_MODE_MASK, /* LVTPC */ |
| 297 | LINT_MASK, LINT_MASK, /* LVT0-1 */ |
| 298 | LVT_MASK /* LVTERR */ |
| 299 | }; |
| 300 | |
| 301 | static int find_highest_vector(void *bitmap) |
| 302 | { |
Takuya Yoshikawa | ecba9a5 | 2012-09-05 19:30:01 +0900 | [diff] [blame] | 303 | int vec; |
| 304 | u32 *reg; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 305 | |
Takuya Yoshikawa | ecba9a5 | 2012-09-05 19:30:01 +0900 | [diff] [blame] | 306 | for (vec = MAX_APIC_VECTOR - APIC_VECTORS_PER_REG; |
| 307 | vec >= 0; vec -= APIC_VECTORS_PER_REG) { |
| 308 | reg = bitmap + REG_POS(vec); |
| 309 | if (*reg) |
| 310 | return fls(*reg) - 1 + vec; |
| 311 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 312 | |
Takuya Yoshikawa | ecba9a5 | 2012-09-05 19:30:01 +0900 | [diff] [blame] | 313 | return -1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 314 | } |
| 315 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 316 | static u8 count_vectors(void *bitmap) |
| 317 | { |
Takuya Yoshikawa | ecba9a5 | 2012-09-05 19:30:01 +0900 | [diff] [blame] | 318 | int vec; |
| 319 | u32 *reg; |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 320 | u8 count = 0; |
Takuya Yoshikawa | ecba9a5 | 2012-09-05 19:30:01 +0900 | [diff] [blame] | 321 | |
| 322 | for (vec = 0; vec < MAX_APIC_VECTOR; vec += APIC_VECTORS_PER_REG) { |
| 323 | reg = bitmap + REG_POS(vec); |
| 324 | count += hweight32(*reg); |
| 325 | } |
| 326 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 327 | return count; |
| 328 | } |
| 329 | |
Wincy Van | 705699a | 2015-02-03 23:58:17 +0800 | [diff] [blame] | 330 | void __kvm_apic_update_irr(u32 *pir, void *regs) |
Yang Zhang | a20ed54 | 2013-04-11 19:25:15 +0800 | [diff] [blame] | 331 | { |
| 332 | u32 i, pir_val; |
Yang Zhang | a20ed54 | 2013-04-11 19:25:15 +0800 | [diff] [blame] | 333 | |
| 334 | for (i = 0; i <= 7; i++) { |
| 335 | pir_val = xchg(&pir[i], 0); |
| 336 | if (pir_val) |
Wincy Van | 705699a | 2015-02-03 23:58:17 +0800 | [diff] [blame] | 337 | *((u32 *)(regs + APIC_IRR + i * 0x10)) |= pir_val; |
Yang Zhang | a20ed54 | 2013-04-11 19:25:15 +0800 | [diff] [blame] | 338 | } |
| 339 | } |
Wincy Van | 705699a | 2015-02-03 23:58:17 +0800 | [diff] [blame] | 340 | EXPORT_SYMBOL_GPL(__kvm_apic_update_irr); |
| 341 | |
| 342 | void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir) |
| 343 | { |
| 344 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 345 | |
| 346 | __kvm_apic_update_irr(pir, apic->regs); |
Radim Krčmář | c77f3fa | 2015-10-08 20:23:33 +0200 | [diff] [blame] | 347 | |
| 348 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Wincy Van | 705699a | 2015-02-03 23:58:17 +0800 | [diff] [blame] | 349 | } |
Yang Zhang | a20ed54 | 2013-04-11 19:25:15 +0800 | [diff] [blame] | 350 | EXPORT_SYMBOL_GPL(kvm_apic_update_irr); |
| 351 | |
Jan Kiszka | 11f5cc0 | 2013-07-25 09:58:45 +0200 | [diff] [blame] | 352 | static inline void apic_set_irr(int vec, struct kvm_lapic *apic) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 353 | { |
Jan Kiszka | 11f5cc0 | 2013-07-25 09:58:45 +0200 | [diff] [blame] | 354 | apic_set_vector(vec, apic->regs + APIC_IRR); |
Nadav Amit | f210f75 | 2014-11-16 23:49:07 +0200 | [diff] [blame] | 355 | /* |
| 356 | * irr_pending must be true if any interrupt is pending; set it after |
| 357 | * APIC_IRR to avoid race with apic_clear_irr |
| 358 | */ |
| 359 | apic->irr_pending = true; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 360 | } |
| 361 | |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 362 | static inline int apic_search_irr(struct kvm_lapic *apic) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 363 | { |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 364 | return find_highest_vector(apic->regs + APIC_IRR); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 365 | } |
| 366 | |
| 367 | static inline int apic_find_highest_irr(struct kvm_lapic *apic) |
| 368 | { |
| 369 | int result; |
| 370 | |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 371 | /* |
| 372 | * Note that irr_pending is just a hint. It will be always |
| 373 | * true with virtual interrupt delivery enabled. |
| 374 | */ |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 375 | if (!apic->irr_pending) |
| 376 | return -1; |
| 377 | |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 378 | if (apic->vcpu->arch.apicv_active) |
| 379 | kvm_x86_ops->sync_pir_to_irr(apic->vcpu); |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 380 | result = apic_search_irr(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 381 | ASSERT(result == -1 || result >= 16); |
| 382 | |
| 383 | return result; |
| 384 | } |
| 385 | |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 386 | static inline void apic_clear_irr(int vec, struct kvm_lapic *apic) |
| 387 | { |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 388 | struct kvm_vcpu *vcpu; |
| 389 | |
| 390 | vcpu = apic->vcpu; |
| 391 | |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 392 | if (unlikely(vcpu->arch.apicv_active)) { |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 393 | /* try to update RVI */ |
Nadav Amit | f210f75 | 2014-11-16 23:49:07 +0200 | [diff] [blame] | 394 | apic_clear_vector(vec, apic->regs + APIC_IRR); |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 395 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Nadav Amit | f210f75 | 2014-11-16 23:49:07 +0200 | [diff] [blame] | 396 | } else { |
| 397 | apic->irr_pending = false; |
| 398 | apic_clear_vector(vec, apic->regs + APIC_IRR); |
| 399 | if (apic_search_irr(apic) != -1) |
| 400 | apic->irr_pending = true; |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 401 | } |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 402 | } |
| 403 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 404 | static inline void apic_set_isr(int vec, struct kvm_lapic *apic) |
| 405 | { |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 406 | struct kvm_vcpu *vcpu; |
Paolo Bonzini | fc57ac2 | 2014-05-14 17:40:58 +0200 | [diff] [blame] | 407 | |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 408 | if (__apic_test_and_set_vector(vec, apic->regs + APIC_ISR)) |
| 409 | return; |
| 410 | |
| 411 | vcpu = apic->vcpu; |
| 412 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 413 | /* |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 414 | * With APIC virtualization enabled, all caching is disabled |
| 415 | * because the processor can modify ISR under the hood. Instead |
| 416 | * just set SVI. |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 417 | */ |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 418 | if (unlikely(vcpu->arch.apicv_active)) |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 419 | kvm_x86_ops->hwapic_isr_update(vcpu->kvm, vec); |
| 420 | else { |
| 421 | ++apic->isr_count; |
| 422 | BUG_ON(apic->isr_count > MAX_APIC_VECTOR); |
| 423 | /* |
| 424 | * ISR (in service register) bit is set when injecting an interrupt. |
| 425 | * The highest vector is injected. Thus the latest bit set matches |
| 426 | * the highest bit in ISR. |
| 427 | */ |
| 428 | apic->highest_isr_cache = vec; |
| 429 | } |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 430 | } |
| 431 | |
Paolo Bonzini | fc57ac2 | 2014-05-14 17:40:58 +0200 | [diff] [blame] | 432 | static inline int apic_find_highest_isr(struct kvm_lapic *apic) |
| 433 | { |
| 434 | int result; |
| 435 | |
| 436 | /* |
| 437 | * Note that isr_count is always 1, and highest_isr_cache |
| 438 | * is always -1, with APIC virtualization enabled. |
| 439 | */ |
| 440 | if (!apic->isr_count) |
| 441 | return -1; |
| 442 | if (likely(apic->highest_isr_cache != -1)) |
| 443 | return apic->highest_isr_cache; |
| 444 | |
| 445 | result = find_highest_vector(apic->regs + APIC_ISR); |
| 446 | ASSERT(result == -1 || result >= 16); |
| 447 | |
| 448 | return result; |
| 449 | } |
| 450 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 451 | static inline void apic_clear_isr(int vec, struct kvm_lapic *apic) |
| 452 | { |
Paolo Bonzini | fc57ac2 | 2014-05-14 17:40:58 +0200 | [diff] [blame] | 453 | struct kvm_vcpu *vcpu; |
| 454 | if (!__apic_test_and_clear_vector(vec, apic->regs + APIC_ISR)) |
| 455 | return; |
| 456 | |
| 457 | vcpu = apic->vcpu; |
| 458 | |
| 459 | /* |
| 460 | * We do get here for APIC virtualization enabled if the guest |
| 461 | * uses the Hyper-V APIC enlightenment. In this case we may need |
| 462 | * to trigger a new interrupt delivery by writing the SVI field; |
| 463 | * on the other hand isr_count and highest_isr_cache are unused |
| 464 | * and must be left alone. |
| 465 | */ |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 466 | if (unlikely(vcpu->arch.apicv_active)) |
Paolo Bonzini | fc57ac2 | 2014-05-14 17:40:58 +0200 | [diff] [blame] | 467 | kvm_x86_ops->hwapic_isr_update(vcpu->kvm, |
| 468 | apic_find_highest_isr(apic)); |
| 469 | else { |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 470 | --apic->isr_count; |
Paolo Bonzini | fc57ac2 | 2014-05-14 17:40:58 +0200 | [diff] [blame] | 471 | BUG_ON(apic->isr_count < 0); |
| 472 | apic->highest_isr_cache = -1; |
| 473 | } |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 474 | } |
| 475 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 476 | int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu) |
| 477 | { |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 478 | /* This may race with setting of irr in __apic_accept_irq() and |
| 479 | * value returned may be wrong, but kvm_vcpu_kick() in __apic_accept_irq |
| 480 | * will cause vmexit immediately and the value will be recalculated |
| 481 | * on the next vmentry. |
| 482 | */ |
Paolo Bonzini | f8543d6 | 2016-01-08 13:42:24 +0100 | [diff] [blame] | 483 | return apic_find_highest_irr(vcpu->arch.apic); |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 484 | } |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 485 | |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 486 | static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 487 | int vector, int level, int trig_mode, |
Joerg Roedel | 9e4aabe | 2016-02-29 16:04:43 +0100 | [diff] [blame] | 488 | struct dest_map *dest_map); |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 489 | |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 490 | int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq, |
Joerg Roedel | 9e4aabe | 2016-02-29 16:04:43 +0100 | [diff] [blame] | 491 | struct dest_map *dest_map) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 492 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 493 | struct kvm_lapic *apic = vcpu->arch.apic; |
Zhang Xiantao | 8be5453 | 2007-12-02 22:35:57 +0800 | [diff] [blame] | 494 | |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 495 | return __apic_accept_irq(apic, irq->delivery_mode, irq->vector, |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 496 | irq->level, irq->trig_mode, dest_map); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 497 | } |
| 498 | |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 499 | static int pv_eoi_put_user(struct kvm_vcpu *vcpu, u8 val) |
| 500 | { |
| 501 | |
| 502 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.pv_eoi.data, &val, |
| 503 | sizeof(val)); |
| 504 | } |
| 505 | |
| 506 | static int pv_eoi_get_user(struct kvm_vcpu *vcpu, u8 *val) |
| 507 | { |
| 508 | |
| 509 | return kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.pv_eoi.data, val, |
| 510 | sizeof(*val)); |
| 511 | } |
| 512 | |
| 513 | static inline bool pv_eoi_enabled(struct kvm_vcpu *vcpu) |
| 514 | { |
| 515 | return vcpu->arch.pv_eoi.msr_val & KVM_MSR_ENABLED; |
| 516 | } |
| 517 | |
| 518 | static bool pv_eoi_get_pending(struct kvm_vcpu *vcpu) |
| 519 | { |
| 520 | u8 val; |
| 521 | if (pv_eoi_get_user(vcpu, &val) < 0) |
| 522 | apic_debug("Can't read EOI MSR value: 0x%llx\n", |
Chen Fan | 9689397 | 2014-01-02 17:14:11 +0800 | [diff] [blame] | 523 | (unsigned long long)vcpu->arch.pv_eoi.msr_val); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 524 | return val & 0x1; |
| 525 | } |
| 526 | |
| 527 | static void pv_eoi_set_pending(struct kvm_vcpu *vcpu) |
| 528 | { |
| 529 | if (pv_eoi_put_user(vcpu, KVM_PV_EOI_ENABLED) < 0) { |
| 530 | apic_debug("Can't set EOI MSR value: 0x%llx\n", |
Chen Fan | 9689397 | 2014-01-02 17:14:11 +0800 | [diff] [blame] | 531 | (unsigned long long)vcpu->arch.pv_eoi.msr_val); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 532 | return; |
| 533 | } |
| 534 | __set_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention); |
| 535 | } |
| 536 | |
| 537 | static void pv_eoi_clr_pending(struct kvm_vcpu *vcpu) |
| 538 | { |
| 539 | if (pv_eoi_put_user(vcpu, KVM_PV_EOI_DISABLED) < 0) { |
| 540 | apic_debug("Can't clear EOI MSR value: 0x%llx\n", |
Chen Fan | 9689397 | 2014-01-02 17:14:11 +0800 | [diff] [blame] | 541 | (unsigned long long)vcpu->arch.pv_eoi.msr_val); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 542 | return; |
| 543 | } |
| 544 | __clear_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention); |
| 545 | } |
| 546 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 547 | static void apic_update_ppr(struct kvm_lapic *apic) |
| 548 | { |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 549 | u32 tpr, isrv, ppr, old_ppr; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 550 | int isr; |
| 551 | |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 552 | old_ppr = kvm_apic_get_reg(apic, APIC_PROCPRI); |
| 553 | tpr = kvm_apic_get_reg(apic, APIC_TASKPRI); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 554 | isr = apic_find_highest_isr(apic); |
| 555 | isrv = (isr != -1) ? isr : 0; |
| 556 | |
| 557 | if ((tpr & 0xf0) >= (isrv & 0xf0)) |
| 558 | ppr = tpr & 0xff; |
| 559 | else |
| 560 | ppr = isrv & 0xf0; |
| 561 | |
| 562 | apic_debug("vlapic %p, ppr 0x%x, isr 0x%x, isrv 0x%x", |
| 563 | apic, ppr, isr, isrv); |
| 564 | |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 565 | if (old_ppr != ppr) { |
| 566 | apic_set_reg(apic, APIC_PROCPRI, ppr); |
Avi Kivity | 83bcacb | 2010-10-25 15:23:55 +0200 | [diff] [blame] | 567 | if (ppr < old_ppr) |
| 568 | kvm_make_request(KVM_REQ_EVENT, apic->vcpu); |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 569 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | static void apic_set_tpr(struct kvm_lapic *apic, u32 tpr) |
| 573 | { |
| 574 | apic_set_reg(apic, APIC_TASKPRI, tpr); |
| 575 | apic_update_ppr(apic); |
| 576 | } |
| 577 | |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 578 | static bool kvm_apic_broadcast(struct kvm_lapic *apic, u32 mda) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 579 | { |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 580 | if (apic_x2apic_mode(apic)) |
| 581 | return mda == X2APIC_BROADCAST; |
| 582 | |
| 583 | return GET_APIC_DEST_FIELD(mda) == APIC_BROADCAST; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 584 | } |
| 585 | |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 586 | static bool kvm_apic_match_physical_addr(struct kvm_lapic *apic, u32 mda) |
Nadav Amit | 394457a | 2014-10-03 00:30:52 +0300 | [diff] [blame] | 587 | { |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 588 | if (kvm_apic_broadcast(apic, mda)) |
| 589 | return true; |
| 590 | |
| 591 | if (apic_x2apic_mode(apic)) |
| 592 | return mda == kvm_apic_id(apic); |
| 593 | |
| 594 | return mda == SET_APIC_DEST_FIELD(kvm_apic_id(apic)); |
Nadav Amit | 394457a | 2014-10-03 00:30:52 +0300 | [diff] [blame] | 595 | } |
| 596 | |
Radim Krčmář | 52c233a | 2015-01-29 22:48:48 +0100 | [diff] [blame] | 597 | static bool kvm_apic_match_logical_addr(struct kvm_lapic *apic, u32 mda) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 598 | { |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 599 | u32 logical_id; |
| 600 | |
Nadav Amit | 394457a | 2014-10-03 00:30:52 +0300 | [diff] [blame] | 601 | if (kvm_apic_broadcast(apic, mda)) |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 602 | return true; |
Nadav Amit | 394457a | 2014-10-03 00:30:52 +0300 | [diff] [blame] | 603 | |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 604 | logical_id = kvm_apic_get_reg(apic, APIC_LDR); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 605 | |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 606 | if (apic_x2apic_mode(apic)) |
Radim Krčmář | 8a39536 | 2015-01-29 22:48:51 +0100 | [diff] [blame] | 607 | return ((logical_id >> 16) == (mda >> 16)) |
| 608 | && (logical_id & mda & 0xffff) != 0; |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 609 | |
| 610 | logical_id = GET_APIC_LOGICAL_ID(logical_id); |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 611 | mda = GET_APIC_DEST_FIELD(mda); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 612 | |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 613 | switch (kvm_apic_get_reg(apic, APIC_DFR)) { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 614 | case APIC_DFR_FLAT: |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 615 | return (logical_id & mda) != 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 616 | case APIC_DFR_CLUSTER: |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 617 | return ((logical_id >> 4) == (mda >> 4)) |
| 618 | && (logical_id & mda & 0xf) != 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 619 | default: |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 620 | apic_debug("Bad DFR vcpu %d: %08x\n", |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 621 | apic->vcpu->vcpu_id, kvm_apic_get_reg(apic, APIC_DFR)); |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 622 | return false; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 623 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 624 | } |
| 625 | |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 626 | /* KVM APIC implementation has two quirks |
| 627 | * - dest always begins at 0 while xAPIC MDA has offset 24, |
| 628 | * - IOxAPIC messages have to be delivered (directly) to x2APIC. |
| 629 | */ |
| 630 | static u32 kvm_apic_mda(unsigned int dest_id, struct kvm_lapic *source, |
| 631 | struct kvm_lapic *target) |
| 632 | { |
| 633 | bool ipi = source != NULL; |
| 634 | bool x2apic_mda = apic_x2apic_mode(ipi ? source : target); |
| 635 | |
| 636 | if (!ipi && dest_id == APIC_BROADCAST && x2apic_mda) |
| 637 | return X2APIC_BROADCAST; |
| 638 | |
| 639 | return x2apic_mda ? dest_id : SET_APIC_DEST_FIELD(dest_id); |
| 640 | } |
| 641 | |
Radim Krčmář | 52c233a | 2015-01-29 22:48:48 +0100 | [diff] [blame] | 642 | bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, |
Nadav Amit | 394457a | 2014-10-03 00:30:52 +0300 | [diff] [blame] | 643 | int short_hand, unsigned int dest, int dest_mode) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 644 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 645 | struct kvm_lapic *target = vcpu->arch.apic; |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 646 | u32 mda = kvm_apic_mda(dest, source, target); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 647 | |
| 648 | apic_debug("target %p, source %p, dest 0x%x, " |
Gleb Natapov | 343f94f | 2009-03-05 16:34:54 +0200 | [diff] [blame] | 649 | "dest_mode 0x%x, short_hand 0x%x\n", |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 650 | target, source, dest, dest_mode, short_hand); |
| 651 | |
Zachary Amsden | bd37139 | 2010-06-14 11:42:15 -1000 | [diff] [blame] | 652 | ASSERT(target); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 653 | switch (short_hand) { |
| 654 | case APIC_DEST_NOSHORT: |
Radim Krčmář | 3697f30 | 2015-01-29 22:48:50 +0100 | [diff] [blame] | 655 | if (dest_mode == APIC_DEST_PHYSICAL) |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 656 | return kvm_apic_match_physical_addr(target, mda); |
Gleb Natapov | 343f94f | 2009-03-05 16:34:54 +0200 | [diff] [blame] | 657 | else |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 658 | return kvm_apic_match_logical_addr(target, mda); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 659 | case APIC_DEST_SELF: |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 660 | return target == source; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 661 | case APIC_DEST_ALLINC: |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 662 | return true; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 663 | case APIC_DEST_ALLBUT: |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 664 | return target != source; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 665 | default: |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 666 | apic_debug("kvm: apic: Bad dest shorthand value %x\n", |
| 667 | short_hand); |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 668 | return false; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 669 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 670 | } |
| 671 | |
Feng Wu | 52004014 | 2016-01-25 16:53:33 +0800 | [diff] [blame] | 672 | int kvm_vector_to_index(u32 vector, u32 dest_vcpus, |
| 673 | const unsigned long *bitmap, u32 bitmap_size) |
| 674 | { |
| 675 | u32 mod; |
| 676 | int i, idx = -1; |
| 677 | |
| 678 | mod = vector % dest_vcpus; |
| 679 | |
| 680 | for (i = 0; i <= mod; i++) { |
| 681 | idx = find_next_bit(bitmap, bitmap_size, idx + 1); |
| 682 | BUG_ON(idx == bitmap_size); |
| 683 | } |
| 684 | |
| 685 | return idx; |
| 686 | } |
| 687 | |
Radim Krčmář | 4efd805 | 2016-02-12 15:00:15 +0100 | [diff] [blame] | 688 | static void kvm_apic_disabled_lapic_found(struct kvm *kvm) |
| 689 | { |
| 690 | if (!kvm->arch.disabled_lapic_found) { |
| 691 | kvm->arch.disabled_lapic_found = true; |
| 692 | printk(KERN_INFO |
| 693 | "Disabled LAPIC found during irq injection\n"); |
| 694 | } |
| 695 | } |
| 696 | |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 697 | bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src, |
Joerg Roedel | 9e4aabe | 2016-02-29 16:04:43 +0100 | [diff] [blame] | 698 | struct kvm_lapic_irq *irq, int *r, struct dest_map *dest_map) |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 699 | { |
| 700 | struct kvm_apic_map *map; |
| 701 | unsigned long bitmap = 1; |
| 702 | struct kvm_lapic **dst; |
| 703 | int i; |
Paolo Bonzini | bea1542 | 2015-04-13 15:40:02 +0200 | [diff] [blame] | 704 | bool ret, x2apic_ipi; |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 705 | |
| 706 | *r = -1; |
| 707 | |
| 708 | if (irq->shorthand == APIC_DEST_SELF) { |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 709 | *r = kvm_apic_set_irq(src->vcpu, irq, dest_map); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 710 | return true; |
| 711 | } |
| 712 | |
| 713 | if (irq->shorthand) |
| 714 | return false; |
| 715 | |
Paolo Bonzini | bea1542 | 2015-04-13 15:40:02 +0200 | [diff] [blame] | 716 | x2apic_ipi = src && apic_x2apic_mode(src); |
Radim Krčmář | 9ea369b | 2015-02-12 19:41:32 +0100 | [diff] [blame] | 717 | if (irq->dest_id == (x2apic_ipi ? X2APIC_BROADCAST : APIC_BROADCAST)) |
| 718 | return false; |
| 719 | |
Paolo Bonzini | bea1542 | 2015-04-13 15:40:02 +0200 | [diff] [blame] | 720 | ret = true; |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 721 | rcu_read_lock(); |
| 722 | map = rcu_dereference(kvm->arch.apic_map); |
| 723 | |
Paolo Bonzini | bea1542 | 2015-04-13 15:40:02 +0200 | [diff] [blame] | 724 | if (!map) { |
| 725 | ret = false; |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 726 | goto out; |
Paolo Bonzini | bea1542 | 2015-04-13 15:40:02 +0200 | [diff] [blame] | 727 | } |
Radim Krčmář | 698f975 | 2014-11-27 20:03:14 +0100 | [diff] [blame] | 728 | |
Radim Krčmář | 3697f30 | 2015-01-29 22:48:50 +0100 | [diff] [blame] | 729 | if (irq->dest_mode == APIC_DEST_PHYSICAL) { |
Radim Krčmář | fa834e9 | 2014-11-27 20:03:12 +0100 | [diff] [blame] | 730 | if (irq->dest_id >= ARRAY_SIZE(map->phys_map)) |
| 731 | goto out; |
| 732 | |
| 733 | dst = &map->phys_map[irq->dest_id]; |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 734 | } else { |
Radim Krčmář | 3548a25 | 2015-02-12 19:41:33 +0100 | [diff] [blame] | 735 | u16 cid; |
| 736 | |
| 737 | if (!kvm_apic_logical_map_valid(map)) { |
| 738 | ret = false; |
| 739 | goto out; |
| 740 | } |
| 741 | |
Radim Krčmář | 3b5a5ff | 2015-02-12 19:41:34 +0100 | [diff] [blame] | 742 | apic_logical_id(map, irq->dest_id, &cid, (u16 *)&bitmap); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 743 | |
Radim Krčmář | 45c3094 | 2014-11-27 20:03:13 +0100 | [diff] [blame] | 744 | if (cid >= ARRAY_SIZE(map->logical_map)) |
| 745 | goto out; |
| 746 | |
| 747 | dst = map->logical_map[cid]; |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 748 | |
Feng Wu | 52004014 | 2016-01-25 16:53:33 +0800 | [diff] [blame] | 749 | if (!kvm_lowest_prio_delivery(irq)) |
| 750 | goto set_irq; |
| 751 | |
| 752 | if (!kvm_vector_hashing_enabled()) { |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 753 | int l = -1; |
| 754 | for_each_set_bit(i, &bitmap, 16) { |
| 755 | if (!dst[i]) |
| 756 | continue; |
| 757 | if (l < 0) |
| 758 | l = i; |
Feng Wu | 52004014 | 2016-01-25 16:53:33 +0800 | [diff] [blame] | 759 | else if (kvm_apic_compare_prio(dst[i]->vcpu, |
| 760 | dst[l]->vcpu) < 0) |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 761 | l = i; |
| 762 | } |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 763 | bitmap = (l >= 0) ? 1 << l : 0; |
Feng Wu | 52004014 | 2016-01-25 16:53:33 +0800 | [diff] [blame] | 764 | } else { |
| 765 | int idx; |
| 766 | unsigned int dest_vcpus; |
| 767 | |
| 768 | dest_vcpus = hweight16(bitmap); |
| 769 | if (dest_vcpus == 0) |
| 770 | goto out; |
| 771 | |
| 772 | idx = kvm_vector_to_index(irq->vector, |
| 773 | dest_vcpus, &bitmap, 16); |
| 774 | |
Radim Krčmář | 4efd805 | 2016-02-12 15:00:15 +0100 | [diff] [blame] | 775 | if (!dst[idx]) { |
| 776 | kvm_apic_disabled_lapic_found(kvm); |
Feng Wu | 52004014 | 2016-01-25 16:53:33 +0800 | [diff] [blame] | 777 | goto out; |
| 778 | } |
| 779 | |
| 780 | bitmap = (idx >= 0) ? 1 << idx : 0; |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 781 | } |
| 782 | } |
| 783 | |
Feng Wu | 52004014 | 2016-01-25 16:53:33 +0800 | [diff] [blame] | 784 | set_irq: |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 785 | for_each_set_bit(i, &bitmap, 16) { |
| 786 | if (!dst[i]) |
| 787 | continue; |
| 788 | if (*r < 0) |
| 789 | *r = 0; |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 790 | *r += kvm_apic_set_irq(dst[i]->vcpu, irq, dest_map); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 791 | } |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 792 | out: |
| 793 | rcu_read_unlock(); |
| 794 | return ret; |
| 795 | } |
| 796 | |
Feng Wu | 6228a0d | 2016-01-25 16:53:34 +0800 | [diff] [blame] | 797 | /* |
| 798 | * This routine tries to handler interrupts in posted mode, here is how |
| 799 | * it deals with different cases: |
| 800 | * - For single-destination interrupts, handle it in posted mode |
| 801 | * - Else if vector hashing is enabled and it is a lowest-priority |
| 802 | * interrupt, handle it in posted mode and use the following mechanism |
| 803 | * to find the destinaiton vCPU. |
| 804 | * 1. For lowest-priority interrupts, store all the possible |
| 805 | * destination vCPUs in an array. |
| 806 | * 2. Use "guest vector % max number of destination vCPUs" to find |
| 807 | * the right destination vCPU in the array for the lowest-priority |
| 808 | * interrupt. |
| 809 | * - Otherwise, use remapped mode to inject the interrupt. |
| 810 | */ |
Feng Wu | 8feb4a0 | 2015-09-18 22:29:47 +0800 | [diff] [blame] | 811 | bool kvm_intr_is_single_vcpu_fast(struct kvm *kvm, struct kvm_lapic_irq *irq, |
| 812 | struct kvm_vcpu **dest_vcpu) |
| 813 | { |
| 814 | struct kvm_apic_map *map; |
| 815 | bool ret = false; |
| 816 | struct kvm_lapic *dst = NULL; |
| 817 | |
| 818 | if (irq->shorthand) |
| 819 | return false; |
| 820 | |
| 821 | rcu_read_lock(); |
| 822 | map = rcu_dereference(kvm->arch.apic_map); |
| 823 | |
| 824 | if (!map) |
| 825 | goto out; |
| 826 | |
| 827 | if (irq->dest_mode == APIC_DEST_PHYSICAL) { |
| 828 | if (irq->dest_id == 0xFF) |
| 829 | goto out; |
| 830 | |
| 831 | if (irq->dest_id >= ARRAY_SIZE(map->phys_map)) |
| 832 | goto out; |
| 833 | |
| 834 | dst = map->phys_map[irq->dest_id]; |
| 835 | if (dst && kvm_apic_present(dst->vcpu)) |
| 836 | *dest_vcpu = dst->vcpu; |
| 837 | else |
| 838 | goto out; |
| 839 | } else { |
| 840 | u16 cid; |
| 841 | unsigned long bitmap = 1; |
| 842 | int i, r = 0; |
| 843 | |
| 844 | if (!kvm_apic_logical_map_valid(map)) |
| 845 | goto out; |
| 846 | |
| 847 | apic_logical_id(map, irq->dest_id, &cid, (u16 *)&bitmap); |
| 848 | |
| 849 | if (cid >= ARRAY_SIZE(map->logical_map)) |
| 850 | goto out; |
| 851 | |
Feng Wu | 6228a0d | 2016-01-25 16:53:34 +0800 | [diff] [blame] | 852 | if (kvm_vector_hashing_enabled() && |
| 853 | kvm_lowest_prio_delivery(irq)) { |
| 854 | int idx; |
| 855 | unsigned int dest_vcpus; |
| 856 | |
| 857 | dest_vcpus = hweight16(bitmap); |
| 858 | if (dest_vcpus == 0) |
| 859 | goto out; |
| 860 | |
| 861 | idx = kvm_vector_to_index(irq->vector, dest_vcpus, |
| 862 | &bitmap, 16); |
| 863 | |
Feng Wu | 6228a0d | 2016-01-25 16:53:34 +0800 | [diff] [blame] | 864 | dst = map->logical_map[cid][idx]; |
Radim Krčmář | 4efd805 | 2016-02-12 15:00:15 +0100 | [diff] [blame] | 865 | if (!dst) { |
| 866 | kvm_apic_disabled_lapic_found(kvm); |
Feng Wu | 6228a0d | 2016-01-25 16:53:34 +0800 | [diff] [blame] | 867 | goto out; |
| 868 | } |
| 869 | |
| 870 | *dest_vcpu = dst->vcpu; |
| 871 | } else { |
| 872 | for_each_set_bit(i, &bitmap, 16) { |
| 873 | dst = map->logical_map[cid][i]; |
| 874 | if (++r == 2) |
| 875 | goto out; |
| 876 | } |
| 877 | |
| 878 | if (dst && kvm_apic_present(dst->vcpu)) |
| 879 | *dest_vcpu = dst->vcpu; |
| 880 | else |
Feng Wu | 8feb4a0 | 2015-09-18 22:29:47 +0800 | [diff] [blame] | 881 | goto out; |
| 882 | } |
Feng Wu | 8feb4a0 | 2015-09-18 22:29:47 +0800 | [diff] [blame] | 883 | } |
| 884 | |
| 885 | ret = true; |
| 886 | out: |
| 887 | rcu_read_unlock(); |
| 888 | return ret; |
| 889 | } |
| 890 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 891 | /* |
| 892 | * Add a pending IRQ into lapic. |
| 893 | * Return 1 if successfully added and 0 if discarded. |
| 894 | */ |
| 895 | static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 896 | int vector, int level, int trig_mode, |
Joerg Roedel | 9e4aabe | 2016-02-29 16:04:43 +0100 | [diff] [blame] | 897 | struct dest_map *dest_map) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 898 | { |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 899 | int result = 0; |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 900 | struct kvm_vcpu *vcpu = apic->vcpu; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 901 | |
Paolo Bonzini | a183b63 | 2014-09-11 11:51:02 +0200 | [diff] [blame] | 902 | trace_kvm_apic_accept_irq(vcpu->vcpu_id, delivery_mode, |
| 903 | trig_mode, vector); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 904 | switch (delivery_mode) { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 905 | case APIC_DM_LOWEST: |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 906 | vcpu->arch.apic_arb_prio++; |
| 907 | case APIC_DM_FIXED: |
Paolo Bonzini | bdaffe1 | 2015-07-29 15:03:06 +0200 | [diff] [blame] | 908 | if (unlikely(trig_mode && !level)) |
| 909 | break; |
| 910 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 911 | /* FIXME add logic for vcpu on reset */ |
| 912 | if (unlikely(!apic_enabled(apic))) |
| 913 | break; |
| 914 | |
Jan Kiszka | 11f5cc0 | 2013-07-25 09:58:45 +0200 | [diff] [blame] | 915 | result = 1; |
| 916 | |
Joerg Roedel | 9daa500 | 2016-02-29 16:04:44 +0100 | [diff] [blame] | 917 | if (dest_map) { |
Joerg Roedel | 9e4aabe | 2016-02-29 16:04:43 +0100 | [diff] [blame] | 918 | __set_bit(vcpu->vcpu_id, dest_map->map); |
Joerg Roedel | 9daa500 | 2016-02-29 16:04:44 +0100 | [diff] [blame] | 919 | dest_map->vectors[vcpu->vcpu_id] = vector; |
| 920 | } |
Avi Kivity | a5d36f8 | 2009-12-29 12:42:16 +0200 | [diff] [blame] | 921 | |
Paolo Bonzini | bdaffe1 | 2015-07-29 15:03:06 +0200 | [diff] [blame] | 922 | if (apic_test_vector(vector, apic->regs + APIC_TMR) != !!trig_mode) { |
| 923 | if (trig_mode) |
| 924 | apic_set_vector(vector, apic->regs + APIC_TMR); |
| 925 | else |
| 926 | apic_clear_vector(vector, apic->regs + APIC_TMR); |
| 927 | } |
| 928 | |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 929 | if (vcpu->arch.apicv_active) |
Yang Zhang | 5a71785 | 2013-04-11 19:25:16 +0800 | [diff] [blame] | 930 | kvm_x86_ops->deliver_posted_interrupt(vcpu, vector); |
Jan Kiszka | 11f5cc0 | 2013-07-25 09:58:45 +0200 | [diff] [blame] | 931 | else { |
| 932 | apic_set_irr(vector, apic); |
Yang Zhang | 5a71785 | 2013-04-11 19:25:16 +0800 | [diff] [blame] | 933 | |
| 934 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
| 935 | kvm_vcpu_kick(vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 936 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 937 | break; |
| 938 | |
| 939 | case APIC_DM_REMRD: |
Raghavendra K T | 24d2166 | 2013-08-26 14:18:35 +0530 | [diff] [blame] | 940 | result = 1; |
| 941 | vcpu->arch.pv.pv_unhalted = 1; |
| 942 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
| 943 | kvm_vcpu_kick(vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 944 | break; |
| 945 | |
| 946 | case APIC_DM_SMI: |
Paolo Bonzini | 64d6067 | 2015-05-07 11:36:11 +0200 | [diff] [blame] | 947 | result = 1; |
| 948 | kvm_make_request(KVM_REQ_SMI, vcpu); |
| 949 | kvm_vcpu_kick(vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 950 | break; |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 951 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 952 | case APIC_DM_NMI: |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 953 | result = 1; |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 954 | kvm_inject_nmi(vcpu); |
Jan Kiszka | 26df99c | 2008-09-26 09:30:54 +0200 | [diff] [blame] | 955 | kvm_vcpu_kick(vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 956 | break; |
| 957 | |
| 958 | case APIC_DM_INIT: |
Julian Stecklina | a52315e | 2012-01-16 14:02:20 +0100 | [diff] [blame] | 959 | if (!trig_mode || level) { |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 960 | result = 1; |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 961 | /* assumes that there are only KVM_APIC_INIT/SIPI */ |
| 962 | apic->pending_events = (1UL << KVM_APIC_INIT); |
| 963 | /* make sure pending_events is visible before sending |
| 964 | * the request */ |
| 965 | smp_wmb(); |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 966 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 967 | kvm_vcpu_kick(vcpu); |
| 968 | } else { |
Jan Kiszka | 1b10bf3 | 2008-09-30 10:41:06 +0200 | [diff] [blame] | 969 | apic_debug("Ignoring de-assert INIT to vcpu %d\n", |
| 970 | vcpu->vcpu_id); |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 971 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 972 | break; |
| 973 | |
| 974 | case APIC_DM_STARTUP: |
Jan Kiszka | 1b10bf3 | 2008-09-30 10:41:06 +0200 | [diff] [blame] | 975 | apic_debug("SIPI to vcpu %d vector 0x%02x\n", |
| 976 | vcpu->vcpu_id, vector); |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 977 | result = 1; |
| 978 | apic->sipi_vector = vector; |
| 979 | /* make sure sipi_vector is visible for the receiver */ |
| 980 | smp_wmb(); |
| 981 | set_bit(KVM_APIC_SIPI, &apic->pending_events); |
| 982 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
| 983 | kvm_vcpu_kick(vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 984 | break; |
| 985 | |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 986 | case APIC_DM_EXTINT: |
| 987 | /* |
| 988 | * Should only be called by kvm_apic_local_deliver() with LVT0, |
| 989 | * before NMI watchdog was enabled. Already handled by |
| 990 | * kvm_apic_accept_pic_intr(). |
| 991 | */ |
| 992 | break; |
| 993 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 994 | default: |
| 995 | printk(KERN_ERR "TODO: unsupported delivery mode %x\n", |
| 996 | delivery_mode); |
| 997 | break; |
| 998 | } |
| 999 | return result; |
| 1000 | } |
| 1001 | |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 1002 | int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1003 | { |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 1004 | return vcpu1->arch.apic_arb_prio - vcpu2->arch.apic_arb_prio; |
Zhang Xiantao | 8be5453 | 2007-12-02 22:35:57 +0800 | [diff] [blame] | 1005 | } |
| 1006 | |
Paolo Bonzini | 3bb345f | 2015-07-29 10:43:18 +0200 | [diff] [blame] | 1007 | static bool kvm_ioapic_handles_vector(struct kvm_lapic *apic, int vector) |
| 1008 | { |
Andrey Smetanin | 6308630 | 2015-11-10 15:36:32 +0300 | [diff] [blame] | 1009 | return test_bit(vector, apic->vcpu->arch.ioapic_handled_vectors); |
Paolo Bonzini | 3bb345f | 2015-07-29 10:43:18 +0200 | [diff] [blame] | 1010 | } |
| 1011 | |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 1012 | static void kvm_ioapic_send_eoi(struct kvm_lapic *apic, int vector) |
| 1013 | { |
Steve Rutherford | 7543a63 | 2015-07-29 23:21:41 -0700 | [diff] [blame] | 1014 | int trigger_mode; |
Paolo Bonzini | 3bb345f | 2015-07-29 10:43:18 +0200 | [diff] [blame] | 1015 | |
Steve Rutherford | 7543a63 | 2015-07-29 23:21:41 -0700 | [diff] [blame] | 1016 | /* Eoi the ioapic only if the ioapic doesn't own the vector. */ |
| 1017 | if (!kvm_ioapic_handles_vector(apic, vector)) |
| 1018 | return; |
| 1019 | |
| 1020 | /* Request a KVM exit to inform the userspace IOAPIC. */ |
| 1021 | if (irqchip_split(apic->vcpu->kvm)) { |
| 1022 | apic->vcpu->arch.pending_ioapic_eoi = vector; |
| 1023 | kvm_make_request(KVM_REQ_IOAPIC_EOI_EXIT, apic->vcpu); |
| 1024 | return; |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 1025 | } |
Steve Rutherford | 7543a63 | 2015-07-29 23:21:41 -0700 | [diff] [blame] | 1026 | |
| 1027 | if (apic_test_vector(vector, apic->regs + APIC_TMR)) |
| 1028 | trigger_mode = IOAPIC_LEVEL_TRIG; |
| 1029 | else |
| 1030 | trigger_mode = IOAPIC_EDGE_TRIG; |
| 1031 | |
| 1032 | kvm_ioapic_update_eoi(apic->vcpu, vector, trigger_mode); |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 1033 | } |
| 1034 | |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 1035 | static int apic_set_eoi(struct kvm_lapic *apic) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1036 | { |
| 1037 | int vector = apic_find_highest_isr(apic); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 1038 | |
| 1039 | trace_kvm_eoi(apic, vector); |
| 1040 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1041 | /* |
| 1042 | * Not every write EOI will has corresponding ISR, |
| 1043 | * one example is when Kernel check timer on setup_IO_APIC |
| 1044 | */ |
| 1045 | if (vector == -1) |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 1046 | return vector; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1047 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 1048 | apic_clear_isr(vector, apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1049 | apic_update_ppr(apic); |
| 1050 | |
Andrey Smetanin | 5c919412 | 2015-11-10 15:36:34 +0300 | [diff] [blame] | 1051 | if (test_bit(vector, vcpu_to_synic(apic->vcpu)->vec_bitmap)) |
| 1052 | kvm_hv_synic_send_eoi(apic->vcpu, vector); |
| 1053 | |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 1054 | kvm_ioapic_send_eoi(apic, vector); |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 1055 | kvm_make_request(KVM_REQ_EVENT, apic->vcpu); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 1056 | return vector; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1057 | } |
| 1058 | |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 1059 | /* |
| 1060 | * this interface assumes a trap-like exit, which has already finished |
| 1061 | * desired side effect including vISR and vPPR update. |
| 1062 | */ |
| 1063 | void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector) |
| 1064 | { |
| 1065 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1066 | |
| 1067 | trace_kvm_eoi(apic, vector); |
| 1068 | |
| 1069 | kvm_ioapic_send_eoi(apic, vector); |
| 1070 | kvm_make_request(KVM_REQ_EVENT, apic->vcpu); |
| 1071 | } |
| 1072 | EXPORT_SYMBOL_GPL(kvm_apic_set_eoi_accelerated); |
| 1073 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1074 | static void apic_send_ipi(struct kvm_lapic *apic) |
| 1075 | { |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1076 | u32 icr_low = kvm_apic_get_reg(apic, APIC_ICR); |
| 1077 | u32 icr_high = kvm_apic_get_reg(apic, APIC_ICR2); |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 1078 | struct kvm_lapic_irq irq; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1079 | |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 1080 | irq.vector = icr_low & APIC_VECTOR_MASK; |
| 1081 | irq.delivery_mode = icr_low & APIC_MODE_MASK; |
| 1082 | irq.dest_mode = icr_low & APIC_DEST_MASK; |
Paolo Bonzini | b7cb223 | 2015-04-21 14:57:05 +0200 | [diff] [blame] | 1083 | irq.level = (icr_low & APIC_INT_ASSERT) != 0; |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 1084 | irq.trig_mode = icr_low & APIC_INT_LEVELTRIG; |
| 1085 | irq.shorthand = icr_low & APIC_SHORT_MASK; |
James Sullivan | 93bbf0b | 2015-03-18 19:26:03 -0600 | [diff] [blame] | 1086 | irq.msi_redir_hint = false; |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1087 | if (apic_x2apic_mode(apic)) |
| 1088 | irq.dest_id = icr_high; |
| 1089 | else |
| 1090 | irq.dest_id = GET_APIC_DEST_FIELD(icr_high); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1091 | |
Gleb Natapov | 1000ff8 | 2009-07-07 16:00:57 +0300 | [diff] [blame] | 1092 | trace_kvm_apic_ipi(icr_low, irq.dest_id); |
| 1093 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1094 | apic_debug("icr_high 0x%x, icr_low 0x%x, " |
| 1095 | "short_hand 0x%x, dest 0x%x, trig_mode 0x%x, level 0x%x, " |
James Sullivan | 93bbf0b | 2015-03-18 19:26:03 -0600 | [diff] [blame] | 1096 | "dest_mode 0x%x, delivery_mode 0x%x, vector 0x%x, " |
| 1097 | "msi_redir_hint 0x%x\n", |
Glauber Costa | 9b5843d | 2009-04-29 17:29:09 -0400 | [diff] [blame] | 1098 | icr_high, icr_low, irq.shorthand, irq.dest_id, |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 1099 | irq.trig_mode, irq.level, irq.dest_mode, irq.delivery_mode, |
James Sullivan | 93bbf0b | 2015-03-18 19:26:03 -0600 | [diff] [blame] | 1100 | irq.vector, irq.msi_redir_hint); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1101 | |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 1102 | kvm_irq_delivery_to_apic(apic->vcpu->kvm, apic, &irq, NULL); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1103 | } |
| 1104 | |
| 1105 | static u32 apic_get_tmcct(struct kvm_lapic *apic) |
| 1106 | { |
Marcelo Tosatti | b682b81 | 2009-02-10 20:41:41 -0200 | [diff] [blame] | 1107 | ktime_t remaining; |
| 1108 | s64 ns; |
Kevin Pedretti | 9da8f4e | 2007-10-21 08:55:50 +0200 | [diff] [blame] | 1109 | u32 tmcct; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1110 | |
| 1111 | ASSERT(apic != NULL); |
| 1112 | |
Kevin Pedretti | 9da8f4e | 2007-10-21 08:55:50 +0200 | [diff] [blame] | 1113 | /* if initial count is 0, current count should also be 0 */ |
Andy Honig | b963a22 | 2013-11-19 14:12:18 -0800 | [diff] [blame] | 1114 | if (kvm_apic_get_reg(apic, APIC_TMICT) == 0 || |
| 1115 | apic->lapic_timer.period == 0) |
Kevin Pedretti | 9da8f4e | 2007-10-21 08:55:50 +0200 | [diff] [blame] | 1116 | return 0; |
| 1117 | |
Marcelo Tosatti | ace1546 | 2009-10-08 10:55:03 -0300 | [diff] [blame] | 1118 | remaining = hrtimer_get_remaining(&apic->lapic_timer.timer); |
Marcelo Tosatti | b682b81 | 2009-02-10 20:41:41 -0200 | [diff] [blame] | 1119 | if (ktime_to_ns(remaining) < 0) |
| 1120 | remaining = ktime_set(0, 0); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1121 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1122 | ns = mod_64(ktime_to_ns(remaining), apic->lapic_timer.period); |
| 1123 | tmcct = div64_u64(ns, |
| 1124 | (APIC_BUS_CYCLE_NS * apic->divide_count)); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1125 | |
| 1126 | return tmcct; |
| 1127 | } |
| 1128 | |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 1129 | static void __report_tpr_access(struct kvm_lapic *apic, bool write) |
| 1130 | { |
| 1131 | struct kvm_vcpu *vcpu = apic->vcpu; |
| 1132 | struct kvm_run *run = vcpu->run; |
| 1133 | |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 1134 | kvm_make_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu); |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 1135 | run->tpr_access.rip = kvm_rip_read(vcpu); |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 1136 | run->tpr_access.is_write = write; |
| 1137 | } |
| 1138 | |
| 1139 | static inline void report_tpr_access(struct kvm_lapic *apic, bool write) |
| 1140 | { |
| 1141 | if (apic->vcpu->arch.tpr_access_reporting) |
| 1142 | __report_tpr_access(apic, write); |
| 1143 | } |
| 1144 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1145 | static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset) |
| 1146 | { |
| 1147 | u32 val = 0; |
| 1148 | |
| 1149 | if (offset >= LAPIC_MMIO_LENGTH) |
| 1150 | return 0; |
| 1151 | |
| 1152 | switch (offset) { |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1153 | case APIC_ID: |
| 1154 | if (apic_x2apic_mode(apic)) |
| 1155 | val = kvm_apic_id(apic); |
| 1156 | else |
| 1157 | val = kvm_apic_id(apic) << 24; |
| 1158 | break; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1159 | case APIC_ARBPRI: |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 1160 | apic_debug("Access APIC ARBPRI register which is for P6\n"); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1161 | break; |
| 1162 | |
| 1163 | case APIC_TMCCT: /* Timer CCR */ |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1164 | if (apic_lvtt_tscdeadline(apic)) |
| 1165 | return 0; |
| 1166 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1167 | val = apic_get_tmcct(apic); |
| 1168 | break; |
Avi Kivity | 4a4541a | 2012-07-22 17:41:00 +0300 | [diff] [blame] | 1169 | case APIC_PROCPRI: |
| 1170 | apic_update_ppr(apic); |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1171 | val = kvm_apic_get_reg(apic, offset); |
Avi Kivity | 4a4541a | 2012-07-22 17:41:00 +0300 | [diff] [blame] | 1172 | break; |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 1173 | case APIC_TASKPRI: |
| 1174 | report_tpr_access(apic, false); |
| 1175 | /* fall thru */ |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1176 | default: |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1177 | val = kvm_apic_get_reg(apic, offset); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1178 | break; |
| 1179 | } |
| 1180 | |
| 1181 | return val; |
| 1182 | } |
| 1183 | |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 1184 | static inline struct kvm_lapic *to_lapic(struct kvm_io_device *dev) |
| 1185 | { |
| 1186 | return container_of(dev, struct kvm_lapic, dev); |
| 1187 | } |
| 1188 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1189 | static int apic_reg_read(struct kvm_lapic *apic, u32 offset, int len, |
| 1190 | void *data) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 1191 | { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1192 | unsigned char alignment = offset & 0xf; |
| 1193 | u32 result; |
Guo Chao | d5b0b5b | 2012-06-28 15:22:57 +0800 | [diff] [blame] | 1194 | /* this bitmask has a bit cleared for each reserved register */ |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1195 | static const u64 rmask = 0x43ff01ffffffe70cULL; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1196 | |
| 1197 | if ((alignment + len) > 4) { |
Gleb Natapov | 4088bb3 | 2009-07-08 11:26:54 +0300 | [diff] [blame] | 1198 | apic_debug("KVM_APIC_READ: alignment error %x %d\n", |
| 1199 | offset, len); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1200 | return 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1201 | } |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1202 | |
| 1203 | if (offset > 0x3f0 || !(rmask & (1ULL << (offset >> 4)))) { |
Gleb Natapov | 4088bb3 | 2009-07-08 11:26:54 +0300 | [diff] [blame] | 1204 | apic_debug("KVM_APIC_READ: read reserved register %x\n", |
| 1205 | offset); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1206 | return 1; |
| 1207 | } |
| 1208 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1209 | result = __apic_read(apic, offset & ~0xf); |
| 1210 | |
Marcelo Tosatti | 229456f | 2009-06-17 09:22:14 -0300 | [diff] [blame] | 1211 | trace_kvm_apic_read(offset, result); |
| 1212 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1213 | switch (len) { |
| 1214 | case 1: |
| 1215 | case 2: |
| 1216 | case 4: |
| 1217 | memcpy(data, (char *)&result + alignment, len); |
| 1218 | break; |
| 1219 | default: |
| 1220 | printk(KERN_ERR "Local APIC read with len = %x, " |
| 1221 | "should be 1,2, or 4 instead\n", len); |
| 1222 | break; |
| 1223 | } |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 1224 | return 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1225 | } |
| 1226 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1227 | static int apic_mmio_in_range(struct kvm_lapic *apic, gpa_t addr) |
| 1228 | { |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1229 | return kvm_apic_hw_enabled(apic) && |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1230 | addr >= apic->base_address && |
| 1231 | addr < apic->base_address + LAPIC_MMIO_LENGTH; |
| 1232 | } |
| 1233 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 1234 | static int apic_mmio_read(struct kvm_vcpu *vcpu, struct kvm_io_device *this, |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1235 | gpa_t address, int len, void *data) |
| 1236 | { |
| 1237 | struct kvm_lapic *apic = to_lapic(this); |
| 1238 | u32 offset = address - apic->base_address; |
| 1239 | |
| 1240 | if (!apic_mmio_in_range(apic, address)) |
| 1241 | return -EOPNOTSUPP; |
| 1242 | |
| 1243 | apic_reg_read(apic, offset, len, data); |
| 1244 | |
| 1245 | return 0; |
| 1246 | } |
| 1247 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1248 | static void update_divide_count(struct kvm_lapic *apic) |
| 1249 | { |
| 1250 | u32 tmp1, tmp2, tdcr; |
| 1251 | |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1252 | tdcr = kvm_apic_get_reg(apic, APIC_TDCR); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1253 | tmp1 = tdcr & 0xf; |
| 1254 | tmp2 = ((tmp1 & 0x3) | ((tmp1 & 0x8) >> 1)) + 1; |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1255 | apic->divide_count = 0x1 << (tmp2 & 0x7); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1256 | |
| 1257 | apic_debug("timer divide count is 0x%x\n", |
Glauber Costa | 9b5843d | 2009-04-29 17:29:09 -0400 | [diff] [blame] | 1258 | apic->divide_count); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1259 | } |
| 1260 | |
Radim Krčmář | b6ac069 | 2015-06-05 20:57:41 +0200 | [diff] [blame] | 1261 | static void apic_update_lvtt(struct kvm_lapic *apic) |
| 1262 | { |
| 1263 | u32 timer_mode = kvm_apic_get_reg(apic, APIC_LVTT) & |
| 1264 | apic->lapic_timer.timer_mode_mask; |
| 1265 | |
| 1266 | if (apic->lapic_timer.timer_mode != timer_mode) { |
| 1267 | apic->lapic_timer.timer_mode = timer_mode; |
| 1268 | hrtimer_cancel(&apic->lapic_timer.timer); |
| 1269 | } |
| 1270 | } |
| 1271 | |
Radim Krčmář | 5d87db7 | 2014-10-10 19:15:08 +0200 | [diff] [blame] | 1272 | static void apic_timer_expired(struct kvm_lapic *apic) |
| 1273 | { |
| 1274 | struct kvm_vcpu *vcpu = apic->vcpu; |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 1275 | struct swait_queue_head *q = &vcpu->wq; |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1276 | struct kvm_timer *ktimer = &apic->lapic_timer; |
Radim Krčmář | 5d87db7 | 2014-10-10 19:15:08 +0200 | [diff] [blame] | 1277 | |
Radim Krčmář | 5d87db7 | 2014-10-10 19:15:08 +0200 | [diff] [blame] | 1278 | if (atomic_read(&apic->lapic_timer.pending)) |
| 1279 | return; |
| 1280 | |
| 1281 | atomic_inc(&apic->lapic_timer.pending); |
Nicholas Krause | bab5bb3 | 2015-01-01 22:05:18 -0500 | [diff] [blame] | 1282 | kvm_set_pending_timer(vcpu); |
Radim Krčmář | 5d87db7 | 2014-10-10 19:15:08 +0200 | [diff] [blame] | 1283 | |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 1284 | if (swait_active(q)) |
| 1285 | swake_up(q); |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1286 | |
| 1287 | if (apic_lvtt_tscdeadline(apic)) |
| 1288 | ktimer->expired_tscdeadline = ktimer->tscdeadline; |
| 1289 | } |
| 1290 | |
| 1291 | /* |
| 1292 | * On APICv, this test will cause a busy wait |
| 1293 | * during a higher-priority task. |
| 1294 | */ |
| 1295 | |
| 1296 | static bool lapic_timer_int_injected(struct kvm_vcpu *vcpu) |
| 1297 | { |
| 1298 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1299 | u32 reg = kvm_apic_get_reg(apic, APIC_LVTT); |
| 1300 | |
| 1301 | if (kvm_apic_hw_enabled(apic)) { |
| 1302 | int vec = reg & APIC_VECTOR_MASK; |
Marcelo Tosatti | f933986 | 2015-02-02 15:26:08 -0200 | [diff] [blame] | 1303 | void *bitmap = apic->regs + APIC_ISR; |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1304 | |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 1305 | if (vcpu->arch.apicv_active) |
Marcelo Tosatti | f933986 | 2015-02-02 15:26:08 -0200 | [diff] [blame] | 1306 | bitmap = apic->regs + APIC_IRR; |
| 1307 | |
| 1308 | if (apic_test_vector(vec, bitmap)) |
| 1309 | return true; |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1310 | } |
| 1311 | return false; |
| 1312 | } |
| 1313 | |
| 1314 | void wait_lapic_expire(struct kvm_vcpu *vcpu) |
| 1315 | { |
| 1316 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1317 | u64 guest_tsc, tsc_deadline; |
| 1318 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 1319 | if (!lapic_in_kernel(vcpu)) |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1320 | return; |
| 1321 | |
| 1322 | if (apic->lapic_timer.expired_tscdeadline == 0) |
| 1323 | return; |
| 1324 | |
| 1325 | if (!lapic_timer_int_injected(vcpu)) |
| 1326 | return; |
| 1327 | |
| 1328 | tsc_deadline = apic->lapic_timer.expired_tscdeadline; |
| 1329 | apic->lapic_timer.expired_tscdeadline = 0; |
Haozhong Zhang | 4ba7653 | 2015-10-20 15:39:07 +0800 | [diff] [blame] | 1330 | guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc()); |
Marcelo Tosatti | 6c19b75 | 2014-12-16 09:08:16 -0500 | [diff] [blame] | 1331 | trace_kvm_wait_lapic_expire(vcpu->vcpu_id, guest_tsc - tsc_deadline); |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1332 | |
| 1333 | /* __delay is delay_tsc whenever the hardware has TSC, thus always. */ |
| 1334 | if (guest_tsc < tsc_deadline) |
| 1335 | __delay(tsc_deadline - guest_tsc); |
Radim Krčmář | 5d87db7 | 2014-10-10 19:15:08 +0200 | [diff] [blame] | 1336 | } |
| 1337 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1338 | static void start_apic_timer(struct kvm_lapic *apic) |
| 1339 | { |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1340 | ktime_t now; |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1341 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1342 | atomic_set(&apic->lapic_timer.pending, 0); |
Avi Kivity | 0b975a3 | 2008-02-24 14:37:50 +0200 | [diff] [blame] | 1343 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1344 | if (apic_lvtt_period(apic) || apic_lvtt_oneshot(apic)) { |
Guo Chao | d5b0b5b | 2012-06-28 15:22:57 +0800 | [diff] [blame] | 1345 | /* lapic timer in oneshot or periodic mode */ |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1346 | now = apic->lapic_timer.timer.base->get_time(); |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1347 | apic->lapic_timer.period = (u64)kvm_apic_get_reg(apic, APIC_TMICT) |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1348 | * APIC_BUS_CYCLE_NS * apic->divide_count; |
Jan Kiszka | 9bc5791 | 2011-09-12 14:10:22 +0200 | [diff] [blame] | 1349 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1350 | if (!apic->lapic_timer.period) |
| 1351 | return; |
| 1352 | /* |
| 1353 | * Do not allow the guest to program periodic timers with small |
| 1354 | * interval, since the hrtimers are not throttled by the host |
| 1355 | * scheduler. |
| 1356 | */ |
| 1357 | if (apic_lvtt_period(apic)) { |
| 1358 | s64 min_period = min_timer_period_us * 1000LL; |
| 1359 | |
| 1360 | if (apic->lapic_timer.period < min_period) { |
| 1361 | pr_info_ratelimited( |
| 1362 | "kvm: vcpu %i: requested %lld ns " |
| 1363 | "lapic timer period limited to %lld ns\n", |
| 1364 | apic->vcpu->vcpu_id, |
| 1365 | apic->lapic_timer.period, min_period); |
| 1366 | apic->lapic_timer.period = min_period; |
| 1367 | } |
Jan Kiszka | 9bc5791 | 2011-09-12 14:10:22 +0200 | [diff] [blame] | 1368 | } |
Avi Kivity | 0b975a3 | 2008-02-24 14:37:50 +0200 | [diff] [blame] | 1369 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1370 | hrtimer_start(&apic->lapic_timer.timer, |
| 1371 | ktime_add_ns(now, apic->lapic_timer.period), |
Luiz Capitulino | 61abdbe | 2016-04-04 16:46:07 -0400 | [diff] [blame] | 1372 | HRTIMER_MODE_ABS_PINNED); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1373 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1374 | apic_debug("%s: bus cycle is %" PRId64 "ns, now 0x%016" |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1375 | PRIx64 ", " |
| 1376 | "timer initial count 0x%x, period %lldns, " |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 1377 | "expire @ 0x%016" PRIx64 ".\n", __func__, |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1378 | APIC_BUS_CYCLE_NS, ktime_to_ns(now), |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1379 | kvm_apic_get_reg(apic, APIC_TMICT), |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1380 | apic->lapic_timer.period, |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1381 | ktime_to_ns(ktime_add_ns(now, |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1382 | apic->lapic_timer.period))); |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1383 | } else if (apic_lvtt_tscdeadline(apic)) { |
| 1384 | /* lapic timer in tsc deadline mode */ |
| 1385 | u64 guest_tsc, tscdeadline = apic->lapic_timer.tscdeadline; |
| 1386 | u64 ns = 0; |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1387 | ktime_t expire; |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1388 | struct kvm_vcpu *vcpu = apic->vcpu; |
Zachary Amsden | cc57828 | 2012-02-03 15:43:50 -0200 | [diff] [blame] | 1389 | unsigned long this_tsc_khz = vcpu->arch.virtual_tsc_khz; |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1390 | unsigned long flags; |
| 1391 | |
| 1392 | if (unlikely(!tscdeadline || !this_tsc_khz)) |
| 1393 | return; |
| 1394 | |
| 1395 | local_irq_save(flags); |
| 1396 | |
| 1397 | now = apic->lapic_timer.timer.base->get_time(); |
Haozhong Zhang | 4ba7653 | 2015-10-20 15:39:07 +0800 | [diff] [blame] | 1398 | guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc()); |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1399 | if (likely(tscdeadline > guest_tsc)) { |
| 1400 | ns = (tscdeadline - guest_tsc) * 1000000ULL; |
| 1401 | do_div(ns, this_tsc_khz); |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1402 | expire = ktime_add_ns(now, ns); |
| 1403 | expire = ktime_sub_ns(expire, lapic_timer_advance_ns); |
Radim Krčmář | 1e0ad70 | 2014-10-10 19:15:09 +0200 | [diff] [blame] | 1404 | hrtimer_start(&apic->lapic_timer.timer, |
Luiz Capitulino | 61abdbe | 2016-04-04 16:46:07 -0400 | [diff] [blame] | 1405 | expire, HRTIMER_MODE_ABS_PINNED); |
Radim Krčmář | 1e0ad70 | 2014-10-10 19:15:09 +0200 | [diff] [blame] | 1406 | } else |
| 1407 | apic_timer_expired(apic); |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1408 | |
| 1409 | local_irq_restore(flags); |
| 1410 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1411 | } |
| 1412 | |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 1413 | static void apic_manage_nmi_watchdog(struct kvm_lapic *apic, u32 lvt0_val) |
| 1414 | { |
Radim Krčmář | 59fd132 | 2015-06-30 22:19:16 +0200 | [diff] [blame] | 1415 | bool lvt0_in_nmi_mode = apic_lvt_nmi_mode(lvt0_val); |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 1416 | |
Radim Krčmář | 59fd132 | 2015-06-30 22:19:16 +0200 | [diff] [blame] | 1417 | if (apic->lvt0_in_nmi_mode != lvt0_in_nmi_mode) { |
| 1418 | apic->lvt0_in_nmi_mode = lvt0_in_nmi_mode; |
| 1419 | if (lvt0_in_nmi_mode) { |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 1420 | apic_debug("Receive NMI setting on APIC_LVT0 " |
| 1421 | "for cpu %d\n", apic->vcpu->vcpu_id); |
Radim Krčmář | 4272013 | 2015-07-01 15:31:49 +0200 | [diff] [blame] | 1422 | atomic_inc(&apic->vcpu->kvm->arch.vapics_in_nmi_mode); |
Radim Krčmář | 59fd132 | 2015-06-30 22:19:16 +0200 | [diff] [blame] | 1423 | } else |
| 1424 | atomic_dec(&apic->vcpu->kvm->arch.vapics_in_nmi_mode); |
| 1425 | } |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 1426 | } |
| 1427 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1428 | static int apic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1429 | { |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1430 | int ret = 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1431 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1432 | trace_kvm_apic_write(reg, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1433 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1434 | switch (reg) { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1435 | case APIC_ID: /* Local APIC ID */ |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1436 | if (!apic_x2apic_mode(apic)) |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 1437 | kvm_apic_set_id(apic, val >> 24); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1438 | else |
| 1439 | ret = 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1440 | break; |
| 1441 | |
| 1442 | case APIC_TASKPRI: |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 1443 | report_tpr_access(apic, true); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1444 | apic_set_tpr(apic, val & 0xff); |
| 1445 | break; |
| 1446 | |
| 1447 | case APIC_EOI: |
| 1448 | apic_set_eoi(apic); |
| 1449 | break; |
| 1450 | |
| 1451 | case APIC_LDR: |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1452 | if (!apic_x2apic_mode(apic)) |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 1453 | kvm_apic_set_ldr(apic, val & APIC_LDR_MASK); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1454 | else |
| 1455 | ret = 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1456 | break; |
| 1457 | |
| 1458 | case APIC_DFR: |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 1459 | if (!apic_x2apic_mode(apic)) { |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1460 | apic_set_reg(apic, APIC_DFR, val | 0x0FFFFFFF); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 1461 | recalculate_apic_map(apic->vcpu->kvm); |
| 1462 | } else |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1463 | ret = 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1464 | break; |
| 1465 | |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 1466 | case APIC_SPIV: { |
| 1467 | u32 mask = 0x3ff; |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1468 | if (kvm_apic_get_reg(apic, APIC_LVR) & APIC_LVR_DIRECTED_EOI) |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 1469 | mask |= APIC_SPIV_DIRECTED_EOI; |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 1470 | apic_set_spiv(apic, val & mask); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1471 | if (!(val & APIC_SPIV_APIC_ENABLED)) { |
| 1472 | int i; |
| 1473 | u32 lvt_val; |
| 1474 | |
| 1475 | for (i = 0; i < APIC_LVT_NUM; i++) { |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1476 | lvt_val = kvm_apic_get_reg(apic, |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1477 | APIC_LVTT + 0x10 * i); |
| 1478 | apic_set_reg(apic, APIC_LVTT + 0x10 * i, |
| 1479 | lvt_val | APIC_LVT_MASKED); |
| 1480 | } |
Radim Krčmář | b6ac069 | 2015-06-05 20:57:41 +0200 | [diff] [blame] | 1481 | apic_update_lvtt(apic); |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1482 | atomic_set(&apic->lapic_timer.pending, 0); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1483 | |
| 1484 | } |
| 1485 | break; |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 1486 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1487 | case APIC_ICR: |
| 1488 | /* No delay here, so we always clear the pending bit */ |
| 1489 | apic_set_reg(apic, APIC_ICR, val & ~(1 << 12)); |
| 1490 | apic_send_ipi(apic); |
| 1491 | break; |
| 1492 | |
| 1493 | case APIC_ICR2: |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1494 | if (!apic_x2apic_mode(apic)) |
| 1495 | val &= 0xff000000; |
| 1496 | apic_set_reg(apic, APIC_ICR2, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1497 | break; |
| 1498 | |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 1499 | case APIC_LVT0: |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 1500 | apic_manage_nmi_watchdog(apic, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1501 | case APIC_LVTTHMR: |
| 1502 | case APIC_LVTPC: |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1503 | case APIC_LVT1: |
| 1504 | case APIC_LVTERR: |
| 1505 | /* TODO: Check vector */ |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1506 | if (!kvm_apic_sw_enabled(apic)) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1507 | val |= APIC_LVT_MASKED; |
| 1508 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1509 | val &= apic_lvt_mask[(reg - APIC_LVTT) >> 4]; |
| 1510 | apic_set_reg(apic, reg, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1511 | |
| 1512 | break; |
| 1513 | |
Radim Krčmář | b6ac069 | 2015-06-05 20:57:41 +0200 | [diff] [blame] | 1514 | case APIC_LVTT: |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1515 | if (!kvm_apic_sw_enabled(apic)) |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1516 | val |= APIC_LVT_MASKED; |
| 1517 | val &= (apic_lvt_mask[0] | apic->lapic_timer.timer_mode_mask); |
| 1518 | apic_set_reg(apic, APIC_LVTT, val); |
Radim Krčmář | b6ac069 | 2015-06-05 20:57:41 +0200 | [diff] [blame] | 1519 | apic_update_lvtt(apic); |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1520 | break; |
| 1521 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1522 | case APIC_TMICT: |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1523 | if (apic_lvtt_tscdeadline(apic)) |
| 1524 | break; |
| 1525 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1526 | hrtimer_cancel(&apic->lapic_timer.timer); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1527 | apic_set_reg(apic, APIC_TMICT, val); |
| 1528 | start_apic_timer(apic); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1529 | break; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1530 | |
| 1531 | case APIC_TDCR: |
| 1532 | if (val & 4) |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 1533 | apic_debug("KVM_WRITE:TDCR %x\n", val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1534 | apic_set_reg(apic, APIC_TDCR, val); |
| 1535 | update_divide_count(apic); |
| 1536 | break; |
| 1537 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1538 | case APIC_ESR: |
| 1539 | if (apic_x2apic_mode(apic) && val != 0) { |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 1540 | apic_debug("KVM_WRITE:ESR not zero %x\n", val); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1541 | ret = 1; |
| 1542 | } |
| 1543 | break; |
| 1544 | |
| 1545 | case APIC_SELF_IPI: |
| 1546 | if (apic_x2apic_mode(apic)) { |
| 1547 | apic_reg_write(apic, APIC_ICR, 0x40000 | (val & 0xff)); |
| 1548 | } else |
| 1549 | ret = 1; |
| 1550 | break; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1551 | default: |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1552 | ret = 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1553 | break; |
| 1554 | } |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1555 | if (ret) |
| 1556 | apic_debug("Local APIC Write to read-only register %x\n", reg); |
| 1557 | return ret; |
| 1558 | } |
| 1559 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 1560 | static int apic_mmio_write(struct kvm_vcpu *vcpu, struct kvm_io_device *this, |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1561 | gpa_t address, int len, const void *data) |
| 1562 | { |
| 1563 | struct kvm_lapic *apic = to_lapic(this); |
| 1564 | unsigned int offset = address - apic->base_address; |
| 1565 | u32 val; |
| 1566 | |
| 1567 | if (!apic_mmio_in_range(apic, address)) |
| 1568 | return -EOPNOTSUPP; |
| 1569 | |
| 1570 | /* |
| 1571 | * APIC register must be aligned on 128-bits boundary. |
| 1572 | * 32/64/128 bits registers must be accessed thru 32 bits. |
| 1573 | * Refer SDM 8.4.1 |
| 1574 | */ |
| 1575 | if (len != 4 || (offset & 0xf)) { |
| 1576 | /* Don't shout loud, $infamous_os would cause only noise. */ |
| 1577 | apic_debug("apic write: bad size=%d %lx\n", len, (long)address); |
Sheng Yang | 756975b | 2009-07-06 11:05:39 +0800 | [diff] [blame] | 1578 | return 0; |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1579 | } |
| 1580 | |
| 1581 | val = *(u32*)data; |
| 1582 | |
| 1583 | /* too common printing */ |
| 1584 | if (offset != APIC_EOI) |
| 1585 | apic_debug("%s: offset 0x%x with length 0x%x, and value is " |
| 1586 | "0x%x\n", __func__, offset, len, val); |
| 1587 | |
| 1588 | apic_reg_write(apic, offset & 0xff0, val); |
| 1589 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 1590 | return 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1591 | } |
| 1592 | |
Kevin Tian | 58fbbf2 | 2011-08-30 13:56:17 +0300 | [diff] [blame] | 1593 | void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu) |
| 1594 | { |
Paolo Bonzini | f8543d6 | 2016-01-08 13:42:24 +0100 | [diff] [blame] | 1595 | apic_reg_write(vcpu->arch.apic, APIC_EOI, 0); |
Kevin Tian | 58fbbf2 | 2011-08-30 13:56:17 +0300 | [diff] [blame] | 1596 | } |
| 1597 | EXPORT_SYMBOL_GPL(kvm_lapic_set_eoi); |
| 1598 | |
Yang Zhang | 83d4c28 | 2013-01-25 10:18:49 +0800 | [diff] [blame] | 1599 | /* emulate APIC access in a trap manner */ |
| 1600 | void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset) |
| 1601 | { |
| 1602 | u32 val = 0; |
| 1603 | |
| 1604 | /* hw has done the conditional check and inst decode */ |
| 1605 | offset &= 0xff0; |
| 1606 | |
| 1607 | apic_reg_read(vcpu->arch.apic, offset, 4, &val); |
| 1608 | |
| 1609 | /* TODO: optimize to just emulate side effect w/o one more write */ |
| 1610 | apic_reg_write(vcpu->arch.apic, offset, val); |
| 1611 | } |
| 1612 | EXPORT_SYMBOL_GPL(kvm_apic_write_nodecode); |
| 1613 | |
Rusty Russell | d589444 | 2007-10-08 10:48:30 +1000 | [diff] [blame] | 1614 | void kvm_free_lapic(struct kvm_vcpu *vcpu) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1615 | { |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 1616 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1617 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1618 | if (!vcpu->arch.apic) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1619 | return; |
| 1620 | |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 1621 | hrtimer_cancel(&apic->lapic_timer.timer); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1622 | |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 1623 | if (!(vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE)) |
| 1624 | static_key_slow_dec_deferred(&apic_hw_disabled); |
| 1625 | |
Radim Krčmář | e462755 | 2014-10-30 15:06:45 +0100 | [diff] [blame] | 1626 | if (!apic->sw_enabled) |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 1627 | static_key_slow_dec_deferred(&apic_sw_disabled); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1628 | |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 1629 | if (apic->regs) |
| 1630 | free_page((unsigned long)apic->regs); |
| 1631 | |
| 1632 | kfree(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1633 | } |
| 1634 | |
| 1635 | /* |
| 1636 | *---------------------------------------------------------------------- |
| 1637 | * LAPIC interface |
| 1638 | *---------------------------------------------------------------------- |
| 1639 | */ |
| 1640 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1641 | u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu) |
| 1642 | { |
| 1643 | struct kvm_lapic *apic = vcpu->arch.apic; |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1644 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 1645 | if (!lapic_in_kernel(vcpu) || apic_lvtt_oneshot(apic) || |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 1646 | apic_lvtt_period(apic)) |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1647 | return 0; |
| 1648 | |
| 1649 | return apic->lapic_timer.tscdeadline; |
| 1650 | } |
| 1651 | |
| 1652 | void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data) |
| 1653 | { |
| 1654 | struct kvm_lapic *apic = vcpu->arch.apic; |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1655 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 1656 | if (!lapic_in_kernel(vcpu) || apic_lvtt_oneshot(apic) || |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 1657 | apic_lvtt_period(apic)) |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1658 | return; |
| 1659 | |
| 1660 | hrtimer_cancel(&apic->lapic_timer.timer); |
| 1661 | apic->lapic_timer.tscdeadline = data; |
| 1662 | start_apic_timer(apic); |
| 1663 | } |
| 1664 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1665 | void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8) |
| 1666 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1667 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1668 | |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1669 | apic_set_tpr(apic, ((cr8 & 0x0f) << 4) |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1670 | | (kvm_apic_get_reg(apic, APIC_TASKPRI) & 4)); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1671 | } |
| 1672 | |
| 1673 | u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu) |
| 1674 | { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1675 | u64 tpr; |
| 1676 | |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1677 | tpr = (u64) kvm_apic_get_reg(vcpu->arch.apic, APIC_TASKPRI); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1678 | |
| 1679 | return (tpr & 0xf0) >> 4; |
| 1680 | } |
| 1681 | |
| 1682 | void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value) |
| 1683 | { |
Yang Zhang | 8d14695 | 2013-01-25 10:18:50 +0800 | [diff] [blame] | 1684 | u64 old_value = vcpu->arch.apic_base; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1685 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1686 | |
| 1687 | if (!apic) { |
| 1688 | value |= MSR_IA32_APICBASE_BSP; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1689 | vcpu->arch.apic_base = value; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1690 | return; |
| 1691 | } |
Gleb Natapov | c5af89b | 2009-06-09 15:56:26 +0300 | [diff] [blame] | 1692 | |
Jan Kiszka | e66d2ae | 2013-12-29 02:29:30 +0100 | [diff] [blame] | 1693 | vcpu->arch.apic_base = value; |
| 1694 | |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 1695 | /* update jump label if enable bit changes */ |
Andrew Jones | 0dce7cd | 2014-01-15 13:39:59 +0100 | [diff] [blame] | 1696 | if ((old_value ^ value) & MSR_IA32_APICBASE_ENABLE) { |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 1697 | if (value & MSR_IA32_APICBASE_ENABLE) |
| 1698 | static_key_slow_dec_deferred(&apic_hw_disabled); |
| 1699 | else |
| 1700 | static_key_slow_inc(&apic_hw_disabled.key); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 1701 | recalculate_apic_map(vcpu->kvm); |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 1702 | } |
| 1703 | |
Yang Zhang | 8d14695 | 2013-01-25 10:18:50 +0800 | [diff] [blame] | 1704 | if ((old_value ^ value) & X2APIC_ENABLE) { |
| 1705 | if (value & X2APIC_ENABLE) { |
Radim Krčmář | 257b9a5 | 2015-05-22 18:45:11 +0200 | [diff] [blame] | 1706 | kvm_apic_set_x2apic_id(apic, vcpu->vcpu_id); |
Yang Zhang | 8d14695 | 2013-01-25 10:18:50 +0800 | [diff] [blame] | 1707 | kvm_x86_ops->set_virtual_x2apic_mode(vcpu, true); |
| 1708 | } else |
| 1709 | kvm_x86_ops->set_virtual_x2apic_mode(vcpu, false); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1710 | } |
Yang Zhang | 8d14695 | 2013-01-25 10:18:50 +0800 | [diff] [blame] | 1711 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1712 | apic->base_address = apic->vcpu->arch.apic_base & |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1713 | MSR_IA32_APICBASE_BASE; |
| 1714 | |
Nadav Amit | db324fe | 2014-11-02 11:54:59 +0200 | [diff] [blame] | 1715 | if ((value & MSR_IA32_APICBASE_ENABLE) && |
| 1716 | apic->base_address != APIC_DEFAULT_PHYS_BASE) |
| 1717 | pr_warn_once("APIC base relocation is unsupported by KVM"); |
| 1718 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1719 | /* with FSB delivery interrupt, we can restart APIC functionality */ |
| 1720 | apic_debug("apic base msr is 0x%016" PRIx64 ", and base address is " |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1721 | "0x%lx.\n", apic->vcpu->arch.apic_base, apic->base_address); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1722 | |
| 1723 | } |
| 1724 | |
Nadav Amit | d28bc9d | 2015-04-13 14:34:08 +0300 | [diff] [blame] | 1725 | void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1726 | { |
| 1727 | struct kvm_lapic *apic; |
| 1728 | int i; |
| 1729 | |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 1730 | apic_debug("%s\n", __func__); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1731 | |
| 1732 | ASSERT(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1733 | apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1734 | ASSERT(apic != NULL); |
| 1735 | |
| 1736 | /* Stop the timer in case it's a reset to an active apic */ |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1737 | hrtimer_cancel(&apic->lapic_timer.timer); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1738 | |
Nadav Amit | d28bc9d | 2015-04-13 14:34:08 +0300 | [diff] [blame] | 1739 | if (!init_event) |
| 1740 | kvm_apic_set_id(apic, vcpu->vcpu_id); |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 1741 | kvm_apic_set_version(apic->vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1742 | |
| 1743 | for (i = 0; i < APIC_LVT_NUM; i++) |
| 1744 | apic_set_reg(apic, APIC_LVTT + 0x10 * i, APIC_LVT_MASKED); |
Radim Krčmář | b6ac069 | 2015-06-05 20:57:41 +0200 | [diff] [blame] | 1745 | apic_update_lvtt(apic); |
Paolo Bonzini | 0da029e | 2015-07-23 08:24:42 +0200 | [diff] [blame] | 1746 | if (kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_LINT0_REENABLED)) |
Nadav Amit | 90de4a1 | 2015-04-13 01:53:41 +0300 | [diff] [blame] | 1747 | apic_set_reg(apic, APIC_LVT0, |
| 1748 | SET_APIC_DELIVERY_MODE(0, APIC_MODE_EXTINT)); |
Radim Krčmář | 59fd132 | 2015-06-30 22:19:16 +0200 | [diff] [blame] | 1749 | apic_manage_nmi_watchdog(apic, kvm_apic_get_reg(apic, APIC_LVT0)); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1750 | |
| 1751 | apic_set_reg(apic, APIC_DFR, 0xffffffffU); |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 1752 | apic_set_spiv(apic, 0xff); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1753 | apic_set_reg(apic, APIC_TASKPRI, 0); |
Radim Krčmář | c028dd6 | 2015-05-22 19:22:10 +0200 | [diff] [blame] | 1754 | if (!apic_x2apic_mode(apic)) |
| 1755 | kvm_apic_set_ldr(apic, 0); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1756 | apic_set_reg(apic, APIC_ESR, 0); |
| 1757 | apic_set_reg(apic, APIC_ICR, 0); |
| 1758 | apic_set_reg(apic, APIC_ICR2, 0); |
| 1759 | apic_set_reg(apic, APIC_TDCR, 0); |
| 1760 | apic_set_reg(apic, APIC_TMICT, 0); |
| 1761 | for (i = 0; i < 8; i++) { |
| 1762 | apic_set_reg(apic, APIC_IRR + 0x10 * i, 0); |
| 1763 | apic_set_reg(apic, APIC_ISR + 0x10 * i, 0); |
| 1764 | apic_set_reg(apic, APIC_TMR + 0x10 * i, 0); |
| 1765 | } |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 1766 | apic->irr_pending = vcpu->arch.apicv_active; |
| 1767 | apic->isr_count = vcpu->arch.apicv_active ? 1 : 0; |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 1768 | apic->highest_isr_cache = -1; |
Kevin Pedretti | b33ac88 | 2007-10-21 08:54:53 +0200 | [diff] [blame] | 1769 | update_divide_count(apic); |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1770 | atomic_set(&apic->lapic_timer.pending, 0); |
Gleb Natapov | c5af89b | 2009-06-09 15:56:26 +0300 | [diff] [blame] | 1771 | if (kvm_vcpu_is_bsp(vcpu)) |
Gleb Natapov | 5dbc8f3 | 2012-08-05 15:58:27 +0300 | [diff] [blame] | 1772 | kvm_lapic_set_base(vcpu, |
| 1773 | vcpu->arch.apic_base | MSR_IA32_APICBASE_BSP); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 1774 | vcpu->arch.pv_eoi.msr_val = 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1775 | apic_update_ppr(apic); |
| 1776 | |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 1777 | vcpu->arch.apic_arb_prio = 0; |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 1778 | vcpu->arch.apic_attention = 0; |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 1779 | |
Nadav Amit | 98eff52 | 2014-06-29 12:28:51 +0300 | [diff] [blame] | 1780 | apic_debug("%s: vcpu=%p, id=%d, base_msr=" |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 1781 | "0x%016" PRIx64 ", base_address=0x%0lx.\n", __func__, |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1782 | vcpu, kvm_apic_id(apic), |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1783 | vcpu->arch.apic_base, apic->base_address); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1784 | } |
| 1785 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1786 | /* |
| 1787 | *---------------------------------------------------------------------- |
| 1788 | * timer interface |
| 1789 | *---------------------------------------------------------------------- |
| 1790 | */ |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1791 | |
Avi Kivity | 2a6eac9 | 2012-07-26 18:01:51 +0300 | [diff] [blame] | 1792 | static bool lapic_is_periodic(struct kvm_lapic *apic) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1793 | { |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1794 | return apic_lvtt_period(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1795 | } |
| 1796 | |
Marcelo Tosatti | 3d80840 | 2008-04-11 14:53:26 -0300 | [diff] [blame] | 1797 | int apic_has_pending_timer(struct kvm_vcpu *vcpu) |
| 1798 | { |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 1799 | struct kvm_lapic *apic = vcpu->arch.apic; |
Marcelo Tosatti | 3d80840 | 2008-04-11 14:53:26 -0300 | [diff] [blame] | 1800 | |
Paolo Bonzini | 1e3161b4 | 2016-01-08 13:41:16 +0100 | [diff] [blame] | 1801 | if (apic_enabled(apic) && apic_lvt_enabled(apic, APIC_LVTT)) |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 1802 | return atomic_read(&apic->lapic_timer.pending); |
Marcelo Tosatti | 3d80840 | 2008-04-11 14:53:26 -0300 | [diff] [blame] | 1803 | |
| 1804 | return 0; |
| 1805 | } |
| 1806 | |
Avi Kivity | 8934208 | 2011-11-10 14:57:21 +0200 | [diff] [blame] | 1807 | int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type) |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1808 | { |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1809 | u32 reg = kvm_apic_get_reg(apic, lvt_type); |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 1810 | int vector, mode, trig_mode; |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1811 | |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1812 | if (kvm_apic_hw_enabled(apic) && !(reg & APIC_LVT_MASKED)) { |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 1813 | vector = reg & APIC_VECTOR_MASK; |
| 1814 | mode = reg & APIC_MODE_MASK; |
| 1815 | trig_mode = reg & APIC_LVT_LEVEL_TRIGGER; |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 1816 | return __apic_accept_irq(apic, mode, vector, 1, trig_mode, |
| 1817 | NULL); |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 1818 | } |
| 1819 | return 0; |
| 1820 | } |
| 1821 | |
Jan Kiszka | 8fdb235 | 2008-10-20 10:20:02 +0200 | [diff] [blame] | 1822 | void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu) |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 1823 | { |
Jan Kiszka | 8fdb235 | 2008-10-20 10:20:02 +0200 | [diff] [blame] | 1824 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1825 | |
| 1826 | if (apic) |
| 1827 | kvm_apic_local_deliver(apic, APIC_LVT0); |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1828 | } |
| 1829 | |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 1830 | static const struct kvm_io_device_ops apic_mmio_ops = { |
| 1831 | .read = apic_mmio_read, |
| 1832 | .write = apic_mmio_write, |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 1833 | }; |
| 1834 | |
Avi Kivity | e9d90d4 | 2012-07-26 18:01:50 +0300 | [diff] [blame] | 1835 | static enum hrtimer_restart apic_timer_fn(struct hrtimer *data) |
| 1836 | { |
| 1837 | struct kvm_timer *ktimer = container_of(data, struct kvm_timer, timer); |
Avi Kivity | 2a6eac9 | 2012-07-26 18:01:51 +0300 | [diff] [blame] | 1838 | struct kvm_lapic *apic = container_of(ktimer, struct kvm_lapic, lapic_timer); |
Avi Kivity | e9d90d4 | 2012-07-26 18:01:50 +0300 | [diff] [blame] | 1839 | |
Radim Krčmář | 5d87db7 | 2014-10-10 19:15:08 +0200 | [diff] [blame] | 1840 | apic_timer_expired(apic); |
Avi Kivity | e9d90d4 | 2012-07-26 18:01:50 +0300 | [diff] [blame] | 1841 | |
Avi Kivity | 2a6eac9 | 2012-07-26 18:01:51 +0300 | [diff] [blame] | 1842 | if (lapic_is_periodic(apic)) { |
Avi Kivity | e9d90d4 | 2012-07-26 18:01:50 +0300 | [diff] [blame] | 1843 | hrtimer_add_expires_ns(&ktimer->timer, ktimer->period); |
| 1844 | return HRTIMER_RESTART; |
| 1845 | } else |
| 1846 | return HRTIMER_NORESTART; |
| 1847 | } |
| 1848 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1849 | int kvm_create_lapic(struct kvm_vcpu *vcpu) |
| 1850 | { |
| 1851 | struct kvm_lapic *apic; |
| 1852 | |
| 1853 | ASSERT(vcpu != NULL); |
| 1854 | apic_debug("apic_init %d\n", vcpu->vcpu_id); |
| 1855 | |
| 1856 | apic = kzalloc(sizeof(*apic), GFP_KERNEL); |
| 1857 | if (!apic) |
| 1858 | goto nomem; |
| 1859 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1860 | vcpu->arch.apic = apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1861 | |
Takuya Yoshikawa | afc2018 | 2011-03-05 12:40:20 +0900 | [diff] [blame] | 1862 | apic->regs = (void *)get_zeroed_page(GFP_KERNEL); |
| 1863 | if (!apic->regs) { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1864 | printk(KERN_ERR "malloc apic regs error for vcpu %x\n", |
| 1865 | vcpu->vcpu_id); |
Rusty Russell | d589444 | 2007-10-08 10:48:30 +1000 | [diff] [blame] | 1866 | goto nomem_free_apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1867 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1868 | apic->vcpu = vcpu; |
| 1869 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1870 | hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC, |
Luiz Capitulino | 61abdbe | 2016-04-04 16:46:07 -0400 | [diff] [blame] | 1871 | HRTIMER_MODE_ABS_PINNED); |
Avi Kivity | e9d90d4 | 2012-07-26 18:01:50 +0300 | [diff] [blame] | 1872 | apic->lapic_timer.timer.function = apic_timer_fn; |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1873 | |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 1874 | /* |
| 1875 | * APIC is created enabled. This will prevent kvm_lapic_set_base from |
| 1876 | * thinking that APIC satet has changed. |
| 1877 | */ |
| 1878 | vcpu->arch.apic_base = MSR_IA32_APICBASE_ENABLE; |
Gleb Natapov | 6aed64a | 2012-08-05 15:58:28 +0300 | [diff] [blame] | 1879 | kvm_lapic_set_base(vcpu, |
| 1880 | APIC_DEFAULT_PHYS_BASE | MSR_IA32_APICBASE_ENABLE); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1881 | |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 1882 | static_key_slow_inc(&apic_sw_disabled.key); /* sw disabled at reset */ |
Nadav Amit | d28bc9d | 2015-04-13 14:34:08 +0300 | [diff] [blame] | 1883 | kvm_lapic_reset(vcpu, false); |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 1884 | kvm_iodevice_init(&apic->dev, &apic_mmio_ops); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1885 | |
| 1886 | return 0; |
Rusty Russell | d589444 | 2007-10-08 10:48:30 +1000 | [diff] [blame] | 1887 | nomem_free_apic: |
| 1888 | kfree(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1889 | nomem: |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1890 | return -ENOMEM; |
| 1891 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1892 | |
| 1893 | int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu) |
| 1894 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1895 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1896 | int highest_irr; |
| 1897 | |
Paolo Bonzini | f8543d6 | 2016-01-08 13:42:24 +0100 | [diff] [blame] | 1898 | if (!apic_enabled(apic)) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1899 | return -1; |
| 1900 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1901 | apic_update_ppr(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1902 | highest_irr = apic_find_highest_irr(apic); |
| 1903 | if ((highest_irr == -1) || |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1904 | ((highest_irr & 0xF0) <= kvm_apic_get_reg(apic, APIC_PROCPRI))) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1905 | return -1; |
| 1906 | return highest_irr; |
| 1907 | } |
| 1908 | |
Qing He | 40487c6 | 2007-09-17 14:47:13 +0800 | [diff] [blame] | 1909 | int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu) |
| 1910 | { |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1911 | u32 lvt0 = kvm_apic_get_reg(vcpu->arch.apic, APIC_LVT0); |
Qing He | 40487c6 | 2007-09-17 14:47:13 +0800 | [diff] [blame] | 1912 | int r = 0; |
| 1913 | |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1914 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) |
Chris Lalancette | e7dca5c | 2010-06-16 17:11:12 -0400 | [diff] [blame] | 1915 | r = 1; |
| 1916 | if ((lvt0 & APIC_LVT_MASKED) == 0 && |
| 1917 | GET_APIC_DELIVERY_MODE(lvt0) == APIC_MODE_EXTINT) |
| 1918 | r = 1; |
Qing He | 40487c6 | 2007-09-17 14:47:13 +0800 | [diff] [blame] | 1919 | return r; |
| 1920 | } |
| 1921 | |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1922 | void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu) |
| 1923 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1924 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1925 | |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 1926 | if (atomic_read(&apic->lapic_timer.pending) > 0) { |
Jan Kiszka | f1ed045 | 2013-04-28 14:00:41 +0200 | [diff] [blame] | 1927 | kvm_apic_local_deliver(apic, APIC_LVTT); |
Nadav Amit | fae0ba2 | 2014-08-18 22:42:13 +0300 | [diff] [blame] | 1928 | if (apic_lvtt_tscdeadline(apic)) |
| 1929 | apic->lapic_timer.tscdeadline = 0; |
Jan Kiszka | f1ed045 | 2013-04-28 14:00:41 +0200 | [diff] [blame] | 1930 | atomic_set(&apic->lapic_timer.pending, 0); |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1931 | } |
| 1932 | } |
| 1933 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1934 | int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu) |
| 1935 | { |
| 1936 | int vector = kvm_apic_has_interrupt(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1937 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1938 | |
| 1939 | if (vector == -1) |
| 1940 | return -1; |
| 1941 | |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 1942 | /* |
| 1943 | * We get here even with APIC virtualization enabled, if doing |
| 1944 | * nested virtualization and L1 runs with the "acknowledge interrupt |
| 1945 | * on exit" mode. Then we cannot inject the interrupt via RVI, |
| 1946 | * because the process would deliver it through the IDT. |
| 1947 | */ |
| 1948 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 1949 | apic_set_isr(vector, apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1950 | apic_update_ppr(apic); |
| 1951 | apic_clear_irr(vector, apic); |
Andrey Smetanin | 5c919412 | 2015-11-10 15:36:34 +0300 | [diff] [blame] | 1952 | |
| 1953 | if (test_bit(vector, vcpu_to_synic(vcpu)->auto_eoi_bitmap)) { |
| 1954 | apic_clear_isr(vector, apic); |
| 1955 | apic_update_ppr(apic); |
| 1956 | } |
| 1957 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1958 | return vector; |
| 1959 | } |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 1960 | |
Gleb Natapov | 64eb062 | 2012-08-08 15:24:36 +0300 | [diff] [blame] | 1961 | void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu, |
| 1962 | struct kvm_lapic_state *s) |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 1963 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1964 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 1965 | |
Gleb Natapov | 5dbc8f3 | 2012-08-05 15:58:27 +0300 | [diff] [blame] | 1966 | kvm_lapic_set_base(vcpu, vcpu->arch.apic_base); |
Gleb Natapov | 64eb062 | 2012-08-08 15:24:36 +0300 | [diff] [blame] | 1967 | /* set SPIV separately to get count of SW disabled APICs right */ |
| 1968 | apic_set_spiv(apic, *((u32 *)(s->regs + APIC_SPIV))); |
| 1969 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 1970 | /* call kvm_apic_set_id() to put apic into apic_map */ |
| 1971 | kvm_apic_set_id(apic, kvm_apic_id(apic)); |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 1972 | kvm_apic_set_version(vcpu); |
| 1973 | |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 1974 | apic_update_ppr(apic); |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1975 | hrtimer_cancel(&apic->lapic_timer.timer); |
Radim Krčmář | b6ac069 | 2015-06-05 20:57:41 +0200 | [diff] [blame] | 1976 | apic_update_lvtt(apic); |
Radim Krčmář | db13856 | 2015-06-30 22:19:17 +0200 | [diff] [blame] | 1977 | apic_manage_nmi_watchdog(apic, kvm_apic_get_reg(apic, APIC_LVT0)); |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 1978 | update_divide_count(apic); |
| 1979 | start_apic_timer(apic); |
Marcelo Tosatti | 6e24a6e | 2009-12-14 17:37:35 -0200 | [diff] [blame] | 1980 | apic->irr_pending = true; |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 1981 | apic->isr_count = vcpu->arch.apicv_active ? |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 1982 | 1 : count_vectors(apic->regs + APIC_ISR); |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 1983 | apic->highest_isr_cache = -1; |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 1984 | if (vcpu->arch.apicv_active) { |
Wei Wang | 4114c27 | 2014-11-05 10:53:43 +0800 | [diff] [blame] | 1985 | kvm_x86_ops->hwapic_irr_update(vcpu, |
| 1986 | apic_find_highest_irr(apic)); |
Tiejun Chen | b4eef9b | 2014-12-22 10:32:57 +0100 | [diff] [blame] | 1987 | kvm_x86_ops->hwapic_isr_update(vcpu->kvm, |
| 1988 | apic_find_highest_isr(apic)); |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 1989 | } |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 1990 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Steve Rutherford | 49df639 | 2015-07-29 23:21:40 -0700 | [diff] [blame] | 1991 | if (ioapic_in_kernel(vcpu->kvm)) |
| 1992 | kvm_rtc_eoi_tracking_restore_one(vcpu); |
Radim Krčmář | 0669a51 | 2015-10-30 15:48:20 +0100 | [diff] [blame] | 1993 | |
| 1994 | vcpu->arch.apic_arb_prio = 0; |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 1995 | } |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 1996 | |
Avi Kivity | 2f52d58 | 2008-01-16 12:49:30 +0200 | [diff] [blame] | 1997 | void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 1998 | { |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 1999 | struct hrtimer *timer; |
| 2000 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 2001 | if (!lapic_in_kernel(vcpu)) |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 2002 | return; |
| 2003 | |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 2004 | timer = &vcpu->arch.apic->lapic_timer.timer; |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 2005 | if (hrtimer_cancel(timer)) |
Luiz Capitulino | 61abdbe | 2016-04-04 16:46:07 -0400 | [diff] [blame] | 2006 | hrtimer_start_expires(timer, HRTIMER_MODE_ABS_PINNED); |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 2007 | } |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2008 | |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2009 | /* |
| 2010 | * apic_sync_pv_eoi_from_guest - called on vmexit or cancel interrupt |
| 2011 | * |
| 2012 | * Detect whether guest triggered PV EOI since the |
| 2013 | * last entry. If yes, set EOI on guests's behalf. |
| 2014 | * Clear PV EOI in guest memory in any case. |
| 2015 | */ |
| 2016 | static void apic_sync_pv_eoi_from_guest(struct kvm_vcpu *vcpu, |
| 2017 | struct kvm_lapic *apic) |
| 2018 | { |
| 2019 | bool pending; |
| 2020 | int vector; |
| 2021 | /* |
| 2022 | * PV EOI state is derived from KVM_APIC_PV_EOI_PENDING in host |
| 2023 | * and KVM_PV_EOI_ENABLED in guest memory as follows: |
| 2024 | * |
| 2025 | * KVM_APIC_PV_EOI_PENDING is unset: |
| 2026 | * -> host disabled PV EOI. |
| 2027 | * KVM_APIC_PV_EOI_PENDING is set, KVM_PV_EOI_ENABLED is set: |
| 2028 | * -> host enabled PV EOI, guest did not execute EOI yet. |
| 2029 | * KVM_APIC_PV_EOI_PENDING is set, KVM_PV_EOI_ENABLED is unset: |
| 2030 | * -> host enabled PV EOI, guest executed EOI. |
| 2031 | */ |
| 2032 | BUG_ON(!pv_eoi_enabled(vcpu)); |
| 2033 | pending = pv_eoi_get_pending(vcpu); |
| 2034 | /* |
| 2035 | * Clear pending bit in any case: it will be set again on vmentry. |
| 2036 | * While this might not be ideal from performance point of view, |
| 2037 | * this makes sure pv eoi is only enabled when we know it's safe. |
| 2038 | */ |
| 2039 | pv_eoi_clr_pending(vcpu); |
| 2040 | if (pending) |
| 2041 | return; |
| 2042 | vector = apic_set_eoi(apic); |
| 2043 | trace_kvm_pv_eoi(apic, vector); |
| 2044 | } |
| 2045 | |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2046 | void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu) |
| 2047 | { |
| 2048 | u32 data; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2049 | |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2050 | if (test_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention)) |
| 2051 | apic_sync_pv_eoi_from_guest(vcpu, vcpu->arch.apic); |
| 2052 | |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 2053 | if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention)) |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2054 | return; |
| 2055 | |
Nicholas Krause | 603242a | 2015-08-05 10:44:40 -0400 | [diff] [blame] | 2056 | if (kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.apic->vapic_cache, &data, |
| 2057 | sizeof(u32))) |
| 2058 | return; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2059 | |
| 2060 | apic_set_tpr(vcpu->arch.apic, data & 0xff); |
| 2061 | } |
| 2062 | |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2063 | /* |
| 2064 | * apic_sync_pv_eoi_to_guest - called before vmentry |
| 2065 | * |
| 2066 | * Detect whether it's safe to enable PV EOI and |
| 2067 | * if yes do so. |
| 2068 | */ |
| 2069 | static void apic_sync_pv_eoi_to_guest(struct kvm_vcpu *vcpu, |
| 2070 | struct kvm_lapic *apic) |
| 2071 | { |
| 2072 | if (!pv_eoi_enabled(vcpu) || |
| 2073 | /* IRR set or many bits in ISR: could be nested. */ |
| 2074 | apic->irr_pending || |
| 2075 | /* Cache not set: could be safe but we don't bother. */ |
| 2076 | apic->highest_isr_cache == -1 || |
| 2077 | /* Need EOI to update ioapic. */ |
Paolo Bonzini | 3bb345f | 2015-07-29 10:43:18 +0200 | [diff] [blame] | 2078 | kvm_ioapic_handles_vector(apic, apic->highest_isr_cache)) { |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2079 | /* |
| 2080 | * PV EOI was disabled by apic_sync_pv_eoi_from_guest |
| 2081 | * so we need not do anything here. |
| 2082 | */ |
| 2083 | return; |
| 2084 | } |
| 2085 | |
| 2086 | pv_eoi_set_pending(apic->vcpu); |
| 2087 | } |
| 2088 | |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2089 | void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu) |
| 2090 | { |
| 2091 | u32 data, tpr; |
| 2092 | int max_irr, max_isr; |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2093 | struct kvm_lapic *apic = vcpu->arch.apic; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2094 | |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2095 | apic_sync_pv_eoi_to_guest(vcpu, apic); |
| 2096 | |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 2097 | if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention)) |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2098 | return; |
| 2099 | |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 2100 | tpr = kvm_apic_get_reg(apic, APIC_TASKPRI) & 0xff; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2101 | max_irr = apic_find_highest_irr(apic); |
| 2102 | if (max_irr < 0) |
| 2103 | max_irr = 0; |
| 2104 | max_isr = apic_find_highest_isr(apic); |
| 2105 | if (max_isr < 0) |
| 2106 | max_isr = 0; |
| 2107 | data = (tpr & 0xff) | ((max_isr & 0xf0) << 8) | (max_irr << 24); |
| 2108 | |
Andy Honig | fda4e2e8 | 2013-11-20 10:23:22 -0800 | [diff] [blame] | 2109 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apic->vapic_cache, &data, |
| 2110 | sizeof(u32)); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2111 | } |
| 2112 | |
Andy Honig | fda4e2e8 | 2013-11-20 10:23:22 -0800 | [diff] [blame] | 2113 | int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr) |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2114 | { |
Andy Honig | fda4e2e8 | 2013-11-20 10:23:22 -0800 | [diff] [blame] | 2115 | if (vapic_addr) { |
| 2116 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, |
| 2117 | &vcpu->arch.apic->vapic_cache, |
| 2118 | vapic_addr, sizeof(u32))) |
| 2119 | return -EINVAL; |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 2120 | __set_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention); |
Andy Honig | fda4e2e8 | 2013-11-20 10:23:22 -0800 | [diff] [blame] | 2121 | } else { |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 2122 | __clear_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention); |
Andy Honig | fda4e2e8 | 2013-11-20 10:23:22 -0800 | [diff] [blame] | 2123 | } |
| 2124 | |
| 2125 | vcpu->arch.apic->vapic_addr = vapic_addr; |
| 2126 | return 0; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2127 | } |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2128 | |
| 2129 | int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 2130 | { |
| 2131 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 2132 | u32 reg = (msr - APIC_BASE_MSR) << 4; |
| 2133 | |
Paolo Bonzini | 35754c9 | 2015-07-29 12:05:37 +0200 | [diff] [blame] | 2134 | if (!lapic_in_kernel(vcpu) || !apic_x2apic_mode(apic)) |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2135 | return 1; |
| 2136 | |
Nadav Amit | c69d3d9 | 2014-11-26 17:56:25 +0200 | [diff] [blame] | 2137 | if (reg == APIC_ICR2) |
| 2138 | return 1; |
| 2139 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2140 | /* if this is ICR write vector before command */ |
Radim Krčmář | decdc28 | 2014-11-26 17:07:05 +0100 | [diff] [blame] | 2141 | if (reg == APIC_ICR) |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2142 | apic_reg_write(apic, APIC_ICR2, (u32)(data >> 32)); |
| 2143 | return apic_reg_write(apic, reg, (u32)data); |
| 2144 | } |
| 2145 | |
| 2146 | int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data) |
| 2147 | { |
| 2148 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 2149 | u32 reg = (msr - APIC_BASE_MSR) << 4, low, high = 0; |
| 2150 | |
Paolo Bonzini | 35754c9 | 2015-07-29 12:05:37 +0200 | [diff] [blame] | 2151 | if (!lapic_in_kernel(vcpu) || !apic_x2apic_mode(apic)) |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2152 | return 1; |
| 2153 | |
Nadav Amit | c69d3d9 | 2014-11-26 17:56:25 +0200 | [diff] [blame] | 2154 | if (reg == APIC_DFR || reg == APIC_ICR2) { |
| 2155 | apic_debug("KVM_APIC_READ: read x2apic reserved register %x\n", |
| 2156 | reg); |
| 2157 | return 1; |
| 2158 | } |
| 2159 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2160 | if (apic_reg_read(apic, reg, 4, &low)) |
| 2161 | return 1; |
Radim Krčmář | decdc28 | 2014-11-26 17:07:05 +0100 | [diff] [blame] | 2162 | if (reg == APIC_ICR) |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2163 | apic_reg_read(apic, APIC_ICR2, 4, &high); |
| 2164 | |
| 2165 | *data = (((u64)high) << 32) | low; |
| 2166 | |
| 2167 | return 0; |
| 2168 | } |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 2169 | |
| 2170 | int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 reg, u64 data) |
| 2171 | { |
| 2172 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 2173 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 2174 | if (!lapic_in_kernel(vcpu)) |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 2175 | return 1; |
| 2176 | |
| 2177 | /* if this is ICR write vector before command */ |
| 2178 | if (reg == APIC_ICR) |
| 2179 | apic_reg_write(apic, APIC_ICR2, (u32)(data >> 32)); |
| 2180 | return apic_reg_write(apic, reg, (u32)data); |
| 2181 | } |
| 2182 | |
| 2183 | int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 reg, u64 *data) |
| 2184 | { |
| 2185 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 2186 | u32 low, high = 0; |
| 2187 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 2188 | if (!lapic_in_kernel(vcpu)) |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 2189 | return 1; |
| 2190 | |
| 2191 | if (apic_reg_read(apic, reg, 4, &low)) |
| 2192 | return 1; |
| 2193 | if (reg == APIC_ICR) |
| 2194 | apic_reg_read(apic, APIC_ICR2, 4, &high); |
| 2195 | |
| 2196 | *data = (((u64)high) << 32) | low; |
| 2197 | |
| 2198 | return 0; |
| 2199 | } |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2200 | |
| 2201 | int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data) |
| 2202 | { |
| 2203 | u64 addr = data & ~KVM_MSR_ENABLED; |
| 2204 | if (!IS_ALIGNED(addr, 4)) |
| 2205 | return 1; |
| 2206 | |
| 2207 | vcpu->arch.pv_eoi.msr_val = data; |
| 2208 | if (!pv_eoi_enabled(vcpu)) |
| 2209 | return 0; |
| 2210 | return kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.pv_eoi.data, |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 2211 | addr, sizeof(u8)); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2212 | } |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 2213 | |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 2214 | void kvm_apic_accept_events(struct kvm_vcpu *vcpu) |
| 2215 | { |
| 2216 | struct kvm_lapic *apic = vcpu->arch.apic; |
Paolo Bonzini | 2b4a273 | 2014-11-24 14:35:24 +0100 | [diff] [blame] | 2217 | u8 sipi_vector; |
Gleb Natapov | 299018f | 2013-06-03 11:30:02 +0300 | [diff] [blame] | 2218 | unsigned long pe; |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 2219 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 2220 | if (!lapic_in_kernel(vcpu) || !apic->pending_events) |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 2221 | return; |
| 2222 | |
Paolo Bonzini | cd7764f | 2015-06-04 10:41:21 +0200 | [diff] [blame] | 2223 | /* |
| 2224 | * INITs are latched while in SMM. Because an SMM CPU cannot |
| 2225 | * be in KVM_MP_STATE_INIT_RECEIVED state, just eat SIPIs |
| 2226 | * and delay processing of INIT until the next RSM. |
| 2227 | */ |
| 2228 | if (is_smm(vcpu)) { |
| 2229 | WARN_ON_ONCE(vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED); |
| 2230 | if (test_bit(KVM_APIC_SIPI, &apic->pending_events)) |
| 2231 | clear_bit(KVM_APIC_SIPI, &apic->pending_events); |
| 2232 | return; |
| 2233 | } |
Gleb Natapov | 299018f | 2013-06-03 11:30:02 +0300 | [diff] [blame] | 2234 | |
Paolo Bonzini | cd7764f | 2015-06-04 10:41:21 +0200 | [diff] [blame] | 2235 | pe = xchg(&apic->pending_events, 0); |
Gleb Natapov | 299018f | 2013-06-03 11:30:02 +0300 | [diff] [blame] | 2236 | if (test_bit(KVM_APIC_INIT, &pe)) { |
Nadav Amit | d28bc9d | 2015-04-13 14:34:08 +0300 | [diff] [blame] | 2237 | kvm_lapic_reset(vcpu, true); |
| 2238 | kvm_vcpu_reset(vcpu, true); |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 2239 | if (kvm_vcpu_is_bsp(apic->vcpu)) |
| 2240 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
| 2241 | else |
| 2242 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; |
| 2243 | } |
Gleb Natapov | 299018f | 2013-06-03 11:30:02 +0300 | [diff] [blame] | 2244 | if (test_bit(KVM_APIC_SIPI, &pe) && |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 2245 | vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { |
| 2246 | /* evaluate pending_events before reading the vector */ |
| 2247 | smp_rmb(); |
| 2248 | sipi_vector = apic->sipi_vector; |
Nadav Amit | 98eff52 | 2014-06-29 12:28:51 +0300 | [diff] [blame] | 2249 | apic_debug("vcpu %d received sipi with vector # %x\n", |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 2250 | vcpu->vcpu_id, sipi_vector); |
| 2251 | kvm_vcpu_deliver_sipi_vector(vcpu, sipi_vector); |
| 2252 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
| 2253 | } |
| 2254 | } |
| 2255 | |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 2256 | void kvm_lapic_init(void) |
| 2257 | { |
| 2258 | /* do not patch jump label more than once per second */ |
| 2259 | jump_label_rate_limit(&apic_hw_disabled, HZ); |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 2260 | jump_label_rate_limit(&apic_sw_disabled, HZ); |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 2261 | } |