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> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 36 | #include <linux/atomic.h> |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 37 | #include "kvm_cache_regs.h" |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 38 | #include "irq.h" |
Marcelo Tosatti | 229456f | 2009-06-17 09:22:14 -0300 | [diff] [blame] | 39 | #include "trace.h" |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 40 | #include "x86.h" |
Avi Kivity | 00b27a3 | 2011-11-23 16:30:32 +0200 | [diff] [blame] | 41 | #include "cpuid.h" |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 42 | |
Marcelo Tosatti | b682b81 | 2009-02-10 20:41:41 -0200 | [diff] [blame] | 43 | #ifndef CONFIG_X86_64 |
| 44 | #define mod_64(x, y) ((x) - (y) * div64_u64(x, y)) |
| 45 | #else |
| 46 | #define mod_64(x, y) ((x) % (y)) |
| 47 | #endif |
| 48 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 49 | #define PRId64 "d" |
| 50 | #define PRIx64 "llx" |
| 51 | #define PRIu64 "u" |
| 52 | #define PRIo64 "o" |
| 53 | |
| 54 | #define APIC_BUS_CYCLE_NS 1 |
| 55 | |
| 56 | /* #define apic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg) */ |
| 57 | #define apic_debug(fmt, arg...) |
| 58 | |
| 59 | #define APIC_LVT_NUM 6 |
| 60 | /* 14 is the version for Xeon and Pentium 8.4.8*/ |
| 61 | #define APIC_VERSION (0x14UL | ((APIC_LVT_NUM - 1) << 16)) |
| 62 | #define LAPIC_MMIO_LENGTH (1 << 12) |
| 63 | /* followed define is not in apicdef.h */ |
| 64 | #define APIC_SHORT_MASK 0xc0000 |
| 65 | #define APIC_DEST_NOSHORT 0x0 |
| 66 | #define APIC_DEST_MASK 0x800 |
| 67 | #define MAX_APIC_VECTOR 256 |
| 68 | |
| 69 | #define VEC_POS(v) ((v) & (32 - 1)) |
| 70 | #define REG_POS(v) (((v) >> 5) << 4) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 71 | |
Jan Kiszka | 9bc5791 | 2011-09-12 14:10:22 +0200 | [diff] [blame] | 72 | static unsigned int min_timer_period_us = 500; |
| 73 | module_param(min_timer_period_us, uint, S_IRUGO | S_IWUSR); |
| 74 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 75 | static inline u32 apic_get_reg(struct kvm_lapic *apic, int reg_off) |
| 76 | { |
| 77 | return *((u32 *) (apic->regs + reg_off)); |
| 78 | } |
| 79 | |
| 80 | static inline void apic_set_reg(struct kvm_lapic *apic, int reg_off, u32 val) |
| 81 | { |
| 82 | *((u32 *) (apic->regs + reg_off)) = val; |
| 83 | } |
| 84 | |
| 85 | static inline int apic_test_and_set_vector(int vec, void *bitmap) |
| 86 | { |
| 87 | return test_and_set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 88 | } |
| 89 | |
| 90 | static inline int apic_test_and_clear_vector(int vec, void *bitmap) |
| 91 | { |
| 92 | return test_and_clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 93 | } |
| 94 | |
Michael S. Tsirkin | a0c9a822 | 2012-04-11 18:49:55 +0300 | [diff] [blame] | 95 | static inline int apic_test_vector(int vec, void *bitmap) |
| 96 | { |
| 97 | return test_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 98 | } |
| 99 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 100 | static inline void apic_set_vector(int vec, void *bitmap) |
| 101 | { |
| 102 | set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 103 | } |
| 104 | |
| 105 | static inline void apic_clear_vector(int vec, void *bitmap) |
| 106 | { |
| 107 | clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 108 | } |
| 109 | |
| 110 | static inline int apic_hw_enabled(struct kvm_lapic *apic) |
| 111 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 112 | return (apic)->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | static inline int apic_sw_enabled(struct kvm_lapic *apic) |
| 116 | { |
| 117 | return apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_APIC_ENABLED; |
| 118 | } |
| 119 | |
| 120 | static inline int apic_enabled(struct kvm_lapic *apic) |
| 121 | { |
| 122 | return apic_sw_enabled(apic) && apic_hw_enabled(apic); |
| 123 | } |
| 124 | |
| 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 | |
| 132 | static inline int kvm_apic_id(struct kvm_lapic *apic) |
| 133 | { |
| 134 | return (apic_get_reg(apic, APIC_ID) >> 24) & 0xff; |
| 135 | } |
| 136 | |
| 137 | static inline int apic_lvt_enabled(struct kvm_lapic *apic, int lvt_type) |
| 138 | { |
| 139 | return !(apic_get_reg(apic, lvt_type) & APIC_LVT_MASKED); |
| 140 | } |
| 141 | |
| 142 | static inline int apic_lvt_vector(struct kvm_lapic *apic, int lvt_type) |
| 143 | { |
| 144 | return apic_get_reg(apic, lvt_type) & APIC_VECTOR_MASK; |
| 145 | } |
| 146 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 147 | static inline int apic_lvtt_oneshot(struct kvm_lapic *apic) |
| 148 | { |
| 149 | return ((apic_get_reg(apic, APIC_LVTT) & |
| 150 | apic->lapic_timer.timer_mode_mask) == APIC_LVT_TIMER_ONESHOT); |
| 151 | } |
| 152 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 153 | static inline int apic_lvtt_period(struct kvm_lapic *apic) |
| 154 | { |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 155 | return ((apic_get_reg(apic, APIC_LVTT) & |
| 156 | apic->lapic_timer.timer_mode_mask) == APIC_LVT_TIMER_PERIODIC); |
| 157 | } |
| 158 | |
| 159 | static inline int apic_lvtt_tscdeadline(struct kvm_lapic *apic) |
| 160 | { |
| 161 | return ((apic_get_reg(apic, APIC_LVTT) & |
| 162 | apic->lapic_timer.timer_mode_mask) == |
| 163 | APIC_LVT_TIMER_TSCDEADLINE); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 164 | } |
| 165 | |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 166 | static inline int apic_lvt_nmi_mode(u32 lvt_val) |
| 167 | { |
| 168 | return (lvt_val & (APIC_MODE_MASK | APIC_LVT_MASKED)) == APIC_DM_NMI; |
| 169 | } |
| 170 | |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 171 | void kvm_apic_set_version(struct kvm_vcpu *vcpu) |
| 172 | { |
| 173 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 174 | struct kvm_cpuid_entry2 *feat; |
| 175 | u32 v = APIC_VERSION; |
| 176 | |
| 177 | if (!irqchip_in_kernel(vcpu->kvm)) |
| 178 | return; |
| 179 | |
| 180 | feat = kvm_find_cpuid_entry(apic->vcpu, 0x1, 0); |
| 181 | if (feat && (feat->ecx & (1 << (X86_FEATURE_X2APIC & 31)))) |
| 182 | v |= APIC_LVR_DIRECTED_EOI; |
| 183 | apic_set_reg(apic, APIC_LVR, v); |
| 184 | } |
| 185 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 186 | static inline int apic_x2apic_mode(struct kvm_lapic *apic) |
| 187 | { |
| 188 | return apic->vcpu->arch.apic_base & X2APIC_ENABLE; |
| 189 | } |
| 190 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 191 | static unsigned int apic_lvt_mask[APIC_LVT_NUM] = { |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 192 | LVT_MASK , /* part LVTT mask, timer mode mask added at runtime */ |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 193 | LVT_MASK | APIC_MODE_MASK, /* LVTTHMR */ |
| 194 | LVT_MASK | APIC_MODE_MASK, /* LVTPC */ |
| 195 | LINT_MASK, LINT_MASK, /* LVT0-1 */ |
| 196 | LVT_MASK /* LVTERR */ |
| 197 | }; |
| 198 | |
| 199 | static int find_highest_vector(void *bitmap) |
| 200 | { |
| 201 | u32 *word = bitmap; |
| 202 | int word_offset = MAX_APIC_VECTOR >> 5; |
| 203 | |
| 204 | while ((word_offset != 0) && (word[(--word_offset) << 2] == 0)) |
| 205 | continue; |
| 206 | |
| 207 | if (likely(!word_offset && !word[0])) |
| 208 | return -1; |
| 209 | else |
| 210 | return fls(word[word_offset << 2]) - 1 + (word_offset << 5); |
| 211 | } |
| 212 | |
| 213 | static inline int apic_test_and_set_irr(int vec, struct kvm_lapic *apic) |
| 214 | { |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 215 | apic->irr_pending = true; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 216 | return apic_test_and_set_vector(vec, apic->regs + APIC_IRR); |
| 217 | } |
| 218 | |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 219 | static inline int apic_search_irr(struct kvm_lapic *apic) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 220 | { |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 221 | return find_highest_vector(apic->regs + APIC_IRR); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | static inline int apic_find_highest_irr(struct kvm_lapic *apic) |
| 225 | { |
| 226 | int result; |
| 227 | |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 228 | if (!apic->irr_pending) |
| 229 | return -1; |
| 230 | |
| 231 | result = apic_search_irr(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 232 | ASSERT(result == -1 || result >= 16); |
| 233 | |
| 234 | return result; |
| 235 | } |
| 236 | |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 237 | static inline void apic_clear_irr(int vec, struct kvm_lapic *apic) |
| 238 | { |
| 239 | apic->irr_pending = false; |
| 240 | apic_clear_vector(vec, apic->regs + APIC_IRR); |
| 241 | if (apic_search_irr(apic) != -1) |
| 242 | apic->irr_pending = true; |
| 243 | } |
| 244 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 245 | int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu) |
| 246 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 247 | struct kvm_lapic *apic = vcpu->arch.apic; |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 248 | int highest_irr; |
| 249 | |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 250 | /* This may race with setting of irr in __apic_accept_irq() and |
| 251 | * value returned may be wrong, but kvm_vcpu_kick() in __apic_accept_irq |
| 252 | * will cause vmexit immediately and the value will be recalculated |
| 253 | * on the next vmentry. |
| 254 | */ |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 255 | if (!apic) |
| 256 | return 0; |
| 257 | highest_irr = apic_find_highest_irr(apic); |
| 258 | |
| 259 | return highest_irr; |
| 260 | } |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 261 | |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 262 | static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, |
| 263 | int vector, int level, int trig_mode); |
| 264 | |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 265 | int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 266 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 267 | struct kvm_lapic *apic = vcpu->arch.apic; |
Zhang Xiantao | 8be5453 | 2007-12-02 22:35:57 +0800 | [diff] [blame] | 268 | |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 269 | return __apic_accept_irq(apic, irq->delivery_mode, irq->vector, |
| 270 | irq->level, irq->trig_mode); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | static inline int apic_find_highest_isr(struct kvm_lapic *apic) |
| 274 | { |
| 275 | int result; |
| 276 | |
| 277 | result = find_highest_vector(apic->regs + APIC_ISR); |
| 278 | ASSERT(result == -1 || result >= 16); |
| 279 | |
| 280 | return result; |
| 281 | } |
| 282 | |
| 283 | static void apic_update_ppr(struct kvm_lapic *apic) |
| 284 | { |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 285 | u32 tpr, isrv, ppr, old_ppr; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 286 | int isr; |
| 287 | |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 288 | old_ppr = apic_get_reg(apic, APIC_PROCPRI); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 289 | tpr = apic_get_reg(apic, APIC_TASKPRI); |
| 290 | isr = apic_find_highest_isr(apic); |
| 291 | isrv = (isr != -1) ? isr : 0; |
| 292 | |
| 293 | if ((tpr & 0xf0) >= (isrv & 0xf0)) |
| 294 | ppr = tpr & 0xff; |
| 295 | else |
| 296 | ppr = isrv & 0xf0; |
| 297 | |
| 298 | apic_debug("vlapic %p, ppr 0x%x, isr 0x%x, isrv 0x%x", |
| 299 | apic, ppr, isr, isrv); |
| 300 | |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 301 | if (old_ppr != ppr) { |
| 302 | apic_set_reg(apic, APIC_PROCPRI, ppr); |
Avi Kivity | 83bcacb | 2010-10-25 15:23:55 +0200 | [diff] [blame] | 303 | if (ppr < old_ppr) |
| 304 | kvm_make_request(KVM_REQ_EVENT, apic->vcpu); |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 305 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 306 | } |
| 307 | |
| 308 | static void apic_set_tpr(struct kvm_lapic *apic, u32 tpr) |
| 309 | { |
| 310 | apic_set_reg(apic, APIC_TASKPRI, tpr); |
| 311 | apic_update_ppr(apic); |
| 312 | } |
| 313 | |
| 314 | int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest) |
| 315 | { |
Gleb Natapov | 343f94f | 2009-03-05 16:34:54 +0200 | [diff] [blame] | 316 | return dest == 0xff || kvm_apic_id(apic) == dest; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda) |
| 320 | { |
| 321 | int result = 0; |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 322 | u32 logical_id; |
| 323 | |
| 324 | if (apic_x2apic_mode(apic)) { |
| 325 | logical_id = apic_get_reg(apic, APIC_LDR); |
| 326 | return logical_id & mda; |
| 327 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 328 | |
| 329 | logical_id = GET_APIC_LOGICAL_ID(apic_get_reg(apic, APIC_LDR)); |
| 330 | |
| 331 | switch (apic_get_reg(apic, APIC_DFR)) { |
| 332 | case APIC_DFR_FLAT: |
| 333 | if (logical_id & mda) |
| 334 | result = 1; |
| 335 | break; |
| 336 | case APIC_DFR_CLUSTER: |
| 337 | if (((logical_id >> 4) == (mda >> 0x4)) |
| 338 | && (logical_id & mda & 0xf)) |
| 339 | result = 1; |
| 340 | break; |
| 341 | default: |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 342 | apic_debug("Bad DFR vcpu %d: %08x\n", |
| 343 | apic->vcpu->vcpu_id, apic_get_reg(apic, APIC_DFR)); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 344 | break; |
| 345 | } |
| 346 | |
| 347 | return result; |
| 348 | } |
| 349 | |
Gleb Natapov | 343f94f | 2009-03-05 16:34:54 +0200 | [diff] [blame] | 350 | int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 351 | int short_hand, int dest, int dest_mode) |
| 352 | { |
| 353 | int result = 0; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 354 | struct kvm_lapic *target = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 355 | |
| 356 | apic_debug("target %p, source %p, dest 0x%x, " |
Gleb Natapov | 343f94f | 2009-03-05 16:34:54 +0200 | [diff] [blame] | 357 | "dest_mode 0x%x, short_hand 0x%x\n", |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 358 | target, source, dest, dest_mode, short_hand); |
| 359 | |
Zachary Amsden | bd37139 | 2010-06-14 11:42:15 -1000 | [diff] [blame] | 360 | ASSERT(target); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 361 | switch (short_hand) { |
| 362 | case APIC_DEST_NOSHORT: |
Gleb Natapov | 343f94f | 2009-03-05 16:34:54 +0200 | [diff] [blame] | 363 | if (dest_mode == 0) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 364 | /* Physical mode. */ |
Gleb Natapov | 343f94f | 2009-03-05 16:34:54 +0200 | [diff] [blame] | 365 | result = kvm_apic_match_physical_addr(target, dest); |
| 366 | else |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 367 | /* Logical mode. */ |
| 368 | result = kvm_apic_match_logical_addr(target, dest); |
| 369 | break; |
| 370 | case APIC_DEST_SELF: |
Gleb Natapov | 343f94f | 2009-03-05 16:34:54 +0200 | [diff] [blame] | 371 | result = (target == source); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 372 | break; |
| 373 | case APIC_DEST_ALLINC: |
| 374 | result = 1; |
| 375 | break; |
| 376 | case APIC_DEST_ALLBUT: |
Gleb Natapov | 343f94f | 2009-03-05 16:34:54 +0200 | [diff] [blame] | 377 | result = (target != source); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 378 | break; |
| 379 | default: |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 380 | apic_debug("kvm: apic: Bad dest shorthand value %x\n", |
| 381 | short_hand); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 382 | break; |
| 383 | } |
| 384 | |
| 385 | return result; |
| 386 | } |
| 387 | |
| 388 | /* |
| 389 | * Add a pending IRQ into lapic. |
| 390 | * Return 1 if successfully added and 0 if discarded. |
| 391 | */ |
| 392 | static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, |
| 393 | int vector, int level, int trig_mode) |
| 394 | { |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 395 | int result = 0; |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 396 | struct kvm_vcpu *vcpu = apic->vcpu; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 397 | |
| 398 | switch (delivery_mode) { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 399 | case APIC_DM_LOWEST: |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 400 | vcpu->arch.apic_arb_prio++; |
| 401 | case APIC_DM_FIXED: |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 402 | /* FIXME add logic for vcpu on reset */ |
| 403 | if (unlikely(!apic_enabled(apic))) |
| 404 | break; |
| 405 | |
Avi Kivity | a5d36f8 | 2009-12-29 12:42:16 +0200 | [diff] [blame] | 406 | if (trig_mode) { |
| 407 | apic_debug("level trig mode for vector %d", vector); |
| 408 | apic_set_vector(vector, apic->regs + APIC_TMR); |
| 409 | } else |
| 410 | apic_clear_vector(vector, apic->regs + APIC_TMR); |
| 411 | |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 412 | result = !apic_test_and_set_irr(vector, apic); |
Gleb Natapov | 1000ff8 | 2009-07-07 16:00:57 +0300 | [diff] [blame] | 413 | trace_kvm_apic_accept_irq(vcpu->vcpu_id, delivery_mode, |
Gleb Natapov | 4da7489 | 2009-08-27 16:25:04 +0300 | [diff] [blame] | 414 | trig_mode, vector, !result); |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 415 | if (!result) { |
| 416 | if (trig_mode) |
| 417 | apic_debug("level trig mode repeatedly for " |
| 418 | "vector %d", vector); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 419 | break; |
| 420 | } |
| 421 | |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 422 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 423 | kvm_vcpu_kick(vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 424 | break; |
| 425 | |
| 426 | case APIC_DM_REMRD: |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 427 | apic_debug("Ignoring delivery mode 3\n"); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 428 | break; |
| 429 | |
| 430 | case APIC_DM_SMI: |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 431 | apic_debug("Ignoring guest SMI\n"); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 432 | break; |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 433 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 434 | case APIC_DM_NMI: |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 435 | result = 1; |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 436 | kvm_inject_nmi(vcpu); |
Jan Kiszka | 26df99c | 2008-09-26 09:30:54 +0200 | [diff] [blame] | 437 | kvm_vcpu_kick(vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 438 | break; |
| 439 | |
| 440 | case APIC_DM_INIT: |
Julian Stecklina | a52315e | 2012-01-16 14:02:20 +0100 | [diff] [blame] | 441 | if (!trig_mode || level) { |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 442 | result = 1; |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 443 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 444 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 445 | kvm_vcpu_kick(vcpu); |
| 446 | } else { |
Jan Kiszka | 1b10bf3 | 2008-09-30 10:41:06 +0200 | [diff] [blame] | 447 | apic_debug("Ignoring de-assert INIT to vcpu %d\n", |
| 448 | vcpu->vcpu_id); |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 449 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 450 | break; |
| 451 | |
| 452 | case APIC_DM_STARTUP: |
Jan Kiszka | 1b10bf3 | 2008-09-30 10:41:06 +0200 | [diff] [blame] | 453 | apic_debug("SIPI to vcpu %d vector 0x%02x\n", |
| 454 | vcpu->vcpu_id, vector); |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 455 | if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 456 | result = 1; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 457 | vcpu->arch.sipi_vector = vector; |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 458 | vcpu->arch.mp_state = KVM_MP_STATE_SIPI_RECEIVED; |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 459 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 460 | kvm_vcpu_kick(vcpu); |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 461 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 462 | break; |
| 463 | |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 464 | case APIC_DM_EXTINT: |
| 465 | /* |
| 466 | * Should only be called by kvm_apic_local_deliver() with LVT0, |
| 467 | * before NMI watchdog was enabled. Already handled by |
| 468 | * kvm_apic_accept_pic_intr(). |
| 469 | */ |
| 470 | break; |
| 471 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 472 | default: |
| 473 | printk(KERN_ERR "TODO: unsupported delivery mode %x\n", |
| 474 | delivery_mode); |
| 475 | break; |
| 476 | } |
| 477 | return result; |
| 478 | } |
| 479 | |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 480 | 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] | 481 | { |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 482 | return vcpu1->arch.apic_arb_prio - vcpu2->arch.apic_arb_prio; |
Zhang Xiantao | 8be5453 | 2007-12-02 22:35:57 +0800 | [diff] [blame] | 483 | } |
| 484 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 485 | static void apic_set_eoi(struct kvm_lapic *apic) |
| 486 | { |
| 487 | int vector = apic_find_highest_isr(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 488 | /* |
| 489 | * Not every write EOI will has corresponding ISR, |
| 490 | * one example is when Kernel check timer on setup_IO_APIC |
| 491 | */ |
| 492 | if (vector == -1) |
| 493 | return; |
| 494 | |
| 495 | apic_clear_vector(vector, apic->regs + APIC_ISR); |
| 496 | apic_update_ppr(apic); |
| 497 | |
Michael S. Tsirkin | a0c9a822 | 2012-04-11 18:49:55 +0300 | [diff] [blame] | 498 | if (!(apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_DIRECTED_EOI) && |
| 499 | kvm_ioapic_handles_vector(apic->vcpu->kvm, vector)) { |
| 500 | int trigger_mode; |
| 501 | if (apic_test_vector(vector, apic->regs + APIC_TMR)) |
| 502 | trigger_mode = IOAPIC_LEVEL_TRIG; |
| 503 | else |
| 504 | trigger_mode = IOAPIC_EDGE_TRIG; |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 505 | kvm_ioapic_update_eoi(apic->vcpu->kvm, vector, trigger_mode); |
Michael S. Tsirkin | a0c9a822 | 2012-04-11 18:49:55 +0300 | [diff] [blame] | 506 | } |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 507 | kvm_make_request(KVM_REQ_EVENT, apic->vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 508 | } |
| 509 | |
| 510 | static void apic_send_ipi(struct kvm_lapic *apic) |
| 511 | { |
| 512 | u32 icr_low = apic_get_reg(apic, APIC_ICR); |
| 513 | u32 icr_high = apic_get_reg(apic, APIC_ICR2); |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 514 | struct kvm_lapic_irq irq; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 515 | |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 516 | irq.vector = icr_low & APIC_VECTOR_MASK; |
| 517 | irq.delivery_mode = icr_low & APIC_MODE_MASK; |
| 518 | irq.dest_mode = icr_low & APIC_DEST_MASK; |
| 519 | irq.level = icr_low & APIC_INT_ASSERT; |
| 520 | irq.trig_mode = icr_low & APIC_INT_LEVELTRIG; |
| 521 | irq.shorthand = icr_low & APIC_SHORT_MASK; |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 522 | if (apic_x2apic_mode(apic)) |
| 523 | irq.dest_id = icr_high; |
| 524 | else |
| 525 | irq.dest_id = GET_APIC_DEST_FIELD(icr_high); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 526 | |
Gleb Natapov | 1000ff8 | 2009-07-07 16:00:57 +0300 | [diff] [blame] | 527 | trace_kvm_apic_ipi(icr_low, irq.dest_id); |
| 528 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 529 | apic_debug("icr_high 0x%x, icr_low 0x%x, " |
| 530 | "short_hand 0x%x, dest 0x%x, trig_mode 0x%x, level 0x%x, " |
| 531 | "dest_mode 0x%x, delivery_mode 0x%x, vector 0x%x\n", |
Glauber Costa | 9b5843dd | 2009-04-29 17:29:09 -0400 | [diff] [blame] | 532 | icr_high, icr_low, irq.shorthand, irq.dest_id, |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 533 | irq.trig_mode, irq.level, irq.dest_mode, irq.delivery_mode, |
| 534 | irq.vector); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 535 | |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 536 | kvm_irq_delivery_to_apic(apic->vcpu->kvm, apic, &irq); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | static u32 apic_get_tmcct(struct kvm_lapic *apic) |
| 540 | { |
Marcelo Tosatti | b682b81 | 2009-02-10 20:41:41 -0200 | [diff] [blame] | 541 | ktime_t remaining; |
| 542 | s64 ns; |
Kevin Pedretti | 9da8f4e | 2007-10-21 08:55:50 +0200 | [diff] [blame] | 543 | u32 tmcct; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 544 | |
| 545 | ASSERT(apic != NULL); |
| 546 | |
Kevin Pedretti | 9da8f4e | 2007-10-21 08:55:50 +0200 | [diff] [blame] | 547 | /* if initial count is 0, current count should also be 0 */ |
Marcelo Tosatti | b682b81 | 2009-02-10 20:41:41 -0200 | [diff] [blame] | 548 | if (apic_get_reg(apic, APIC_TMICT) == 0) |
Kevin Pedretti | 9da8f4e | 2007-10-21 08:55:50 +0200 | [diff] [blame] | 549 | return 0; |
| 550 | |
Marcelo Tosatti | ace1546 | 2009-10-08 10:55:03 -0300 | [diff] [blame] | 551 | remaining = hrtimer_get_remaining(&apic->lapic_timer.timer); |
Marcelo Tosatti | b682b81 | 2009-02-10 20:41:41 -0200 | [diff] [blame] | 552 | if (ktime_to_ns(remaining) < 0) |
| 553 | remaining = ktime_set(0, 0); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 554 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 555 | ns = mod_64(ktime_to_ns(remaining), apic->lapic_timer.period); |
| 556 | tmcct = div64_u64(ns, |
| 557 | (APIC_BUS_CYCLE_NS * apic->divide_count)); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 558 | |
| 559 | return tmcct; |
| 560 | } |
| 561 | |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 562 | static void __report_tpr_access(struct kvm_lapic *apic, bool write) |
| 563 | { |
| 564 | struct kvm_vcpu *vcpu = apic->vcpu; |
| 565 | struct kvm_run *run = vcpu->run; |
| 566 | |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 567 | kvm_make_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu); |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 568 | run->tpr_access.rip = kvm_rip_read(vcpu); |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 569 | run->tpr_access.is_write = write; |
| 570 | } |
| 571 | |
| 572 | static inline void report_tpr_access(struct kvm_lapic *apic, bool write) |
| 573 | { |
| 574 | if (apic->vcpu->arch.tpr_access_reporting) |
| 575 | __report_tpr_access(apic, write); |
| 576 | } |
| 577 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 578 | static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset) |
| 579 | { |
| 580 | u32 val = 0; |
| 581 | |
| 582 | if (offset >= LAPIC_MMIO_LENGTH) |
| 583 | return 0; |
| 584 | |
| 585 | switch (offset) { |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 586 | case APIC_ID: |
| 587 | if (apic_x2apic_mode(apic)) |
| 588 | val = kvm_apic_id(apic); |
| 589 | else |
| 590 | val = kvm_apic_id(apic) << 24; |
| 591 | break; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 592 | case APIC_ARBPRI: |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 593 | apic_debug("Access APIC ARBPRI register which is for P6\n"); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 594 | break; |
| 595 | |
| 596 | case APIC_TMCCT: /* Timer CCR */ |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 597 | if (apic_lvtt_tscdeadline(apic)) |
| 598 | return 0; |
| 599 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 600 | val = apic_get_tmcct(apic); |
| 601 | break; |
| 602 | |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 603 | case APIC_TASKPRI: |
| 604 | report_tpr_access(apic, false); |
| 605 | /* fall thru */ |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 606 | default: |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 607 | apic_update_ppr(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 608 | val = apic_get_reg(apic, offset); |
| 609 | break; |
| 610 | } |
| 611 | |
| 612 | return val; |
| 613 | } |
| 614 | |
Gregory Haskins | d76685c4 | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 615 | static inline struct kvm_lapic *to_lapic(struct kvm_io_device *dev) |
| 616 | { |
| 617 | return container_of(dev, struct kvm_lapic, dev); |
| 618 | } |
| 619 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 620 | static int apic_reg_read(struct kvm_lapic *apic, u32 offset, int len, |
| 621 | void *data) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 622 | { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 623 | unsigned char alignment = offset & 0xf; |
| 624 | u32 result; |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 625 | /* this bitmask has a bit cleared for each reserver register */ |
| 626 | static const u64 rmask = 0x43ff01ffffffe70cULL; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 627 | |
| 628 | if ((alignment + len) > 4) { |
Gleb Natapov | 4088bb3 | 2009-07-08 11:26:54 +0300 | [diff] [blame] | 629 | apic_debug("KVM_APIC_READ: alignment error %x %d\n", |
| 630 | offset, len); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 631 | return 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 632 | } |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 633 | |
| 634 | if (offset > 0x3f0 || !(rmask & (1ULL << (offset >> 4)))) { |
Gleb Natapov | 4088bb3 | 2009-07-08 11:26:54 +0300 | [diff] [blame] | 635 | apic_debug("KVM_APIC_READ: read reserved register %x\n", |
| 636 | offset); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 637 | return 1; |
| 638 | } |
| 639 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 640 | result = __apic_read(apic, offset & ~0xf); |
| 641 | |
Marcelo Tosatti | 229456f | 2009-06-17 09:22:14 -0300 | [diff] [blame] | 642 | trace_kvm_apic_read(offset, result); |
| 643 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 644 | switch (len) { |
| 645 | case 1: |
| 646 | case 2: |
| 647 | case 4: |
| 648 | memcpy(data, (char *)&result + alignment, len); |
| 649 | break; |
| 650 | default: |
| 651 | printk(KERN_ERR "Local APIC read with len = %x, " |
| 652 | "should be 1,2, or 4 instead\n", len); |
| 653 | break; |
| 654 | } |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 655 | return 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 656 | } |
| 657 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 658 | static int apic_mmio_in_range(struct kvm_lapic *apic, gpa_t addr) |
| 659 | { |
| 660 | return apic_hw_enabled(apic) && |
| 661 | addr >= apic->base_address && |
| 662 | addr < apic->base_address + LAPIC_MMIO_LENGTH; |
| 663 | } |
| 664 | |
| 665 | static int apic_mmio_read(struct kvm_io_device *this, |
| 666 | gpa_t address, int len, void *data) |
| 667 | { |
| 668 | struct kvm_lapic *apic = to_lapic(this); |
| 669 | u32 offset = address - apic->base_address; |
| 670 | |
| 671 | if (!apic_mmio_in_range(apic, address)) |
| 672 | return -EOPNOTSUPP; |
| 673 | |
| 674 | apic_reg_read(apic, offset, len, data); |
| 675 | |
| 676 | return 0; |
| 677 | } |
| 678 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 679 | static void update_divide_count(struct kvm_lapic *apic) |
| 680 | { |
| 681 | u32 tmp1, tmp2, tdcr; |
| 682 | |
| 683 | tdcr = apic_get_reg(apic, APIC_TDCR); |
| 684 | tmp1 = tdcr & 0xf; |
| 685 | tmp2 = ((tmp1 & 0x3) | ((tmp1 & 0x8) >> 1)) + 1; |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 686 | apic->divide_count = 0x1 << (tmp2 & 0x7); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 687 | |
| 688 | apic_debug("timer divide count is 0x%x\n", |
Glauber Costa | 9b5843dd | 2009-04-29 17:29:09 -0400 | [diff] [blame] | 689 | apic->divide_count); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 690 | } |
| 691 | |
| 692 | static void start_apic_timer(struct kvm_lapic *apic) |
| 693 | { |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 694 | ktime_t now; |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 695 | atomic_set(&apic->lapic_timer.pending, 0); |
Avi Kivity | 0b975a3 | 2008-02-24 14:37:50 +0200 | [diff] [blame] | 696 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 697 | if (apic_lvtt_period(apic) || apic_lvtt_oneshot(apic)) { |
| 698 | /* lapic timer in oneshot or peroidic mode */ |
| 699 | now = apic->lapic_timer.timer.base->get_time(); |
| 700 | apic->lapic_timer.period = (u64)apic_get_reg(apic, APIC_TMICT) |
| 701 | * APIC_BUS_CYCLE_NS * apic->divide_count; |
Jan Kiszka | 9bc5791 | 2011-09-12 14:10:22 +0200 | [diff] [blame] | 702 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 703 | if (!apic->lapic_timer.period) |
| 704 | return; |
| 705 | /* |
| 706 | * Do not allow the guest to program periodic timers with small |
| 707 | * interval, since the hrtimers are not throttled by the host |
| 708 | * scheduler. |
| 709 | */ |
| 710 | if (apic_lvtt_period(apic)) { |
| 711 | s64 min_period = min_timer_period_us * 1000LL; |
| 712 | |
| 713 | if (apic->lapic_timer.period < min_period) { |
| 714 | pr_info_ratelimited( |
| 715 | "kvm: vcpu %i: requested %lld ns " |
| 716 | "lapic timer period limited to %lld ns\n", |
| 717 | apic->vcpu->vcpu_id, |
| 718 | apic->lapic_timer.period, min_period); |
| 719 | apic->lapic_timer.period = min_period; |
| 720 | } |
Jan Kiszka | 9bc5791 | 2011-09-12 14:10:22 +0200 | [diff] [blame] | 721 | } |
Avi Kivity | 0b975a3 | 2008-02-24 14:37:50 +0200 | [diff] [blame] | 722 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 723 | hrtimer_start(&apic->lapic_timer.timer, |
| 724 | ktime_add_ns(now, apic->lapic_timer.period), |
| 725 | HRTIMER_MODE_ABS); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 726 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 727 | apic_debug("%s: bus cycle is %" PRId64 "ns, now 0x%016" |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 728 | PRIx64 ", " |
| 729 | "timer initial count 0x%x, period %lldns, " |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 730 | "expire @ 0x%016" PRIx64 ".\n", __func__, |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 731 | APIC_BUS_CYCLE_NS, ktime_to_ns(now), |
| 732 | apic_get_reg(apic, APIC_TMICT), |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 733 | apic->lapic_timer.period, |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 734 | ktime_to_ns(ktime_add_ns(now, |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 735 | apic->lapic_timer.period))); |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 736 | } else if (apic_lvtt_tscdeadline(apic)) { |
| 737 | /* lapic timer in tsc deadline mode */ |
| 738 | u64 guest_tsc, tscdeadline = apic->lapic_timer.tscdeadline; |
| 739 | u64 ns = 0; |
| 740 | struct kvm_vcpu *vcpu = apic->vcpu; |
Zachary Amsden | cc57828 | 2012-02-03 15:43:50 -0200 | [diff] [blame] | 741 | unsigned long this_tsc_khz = vcpu->arch.virtual_tsc_khz; |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 742 | unsigned long flags; |
| 743 | |
| 744 | if (unlikely(!tscdeadline || !this_tsc_khz)) |
| 745 | return; |
| 746 | |
| 747 | local_irq_save(flags); |
| 748 | |
| 749 | now = apic->lapic_timer.timer.base->get_time(); |
| 750 | guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu); |
| 751 | if (likely(tscdeadline > guest_tsc)) { |
| 752 | ns = (tscdeadline - guest_tsc) * 1000000ULL; |
| 753 | do_div(ns, this_tsc_khz); |
| 754 | } |
| 755 | hrtimer_start(&apic->lapic_timer.timer, |
| 756 | ktime_add_ns(now, ns), HRTIMER_MODE_ABS); |
| 757 | |
| 758 | local_irq_restore(flags); |
| 759 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 760 | } |
| 761 | |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 762 | static void apic_manage_nmi_watchdog(struct kvm_lapic *apic, u32 lvt0_val) |
| 763 | { |
| 764 | int nmi_wd_enabled = apic_lvt_nmi_mode(apic_get_reg(apic, APIC_LVT0)); |
| 765 | |
| 766 | if (apic_lvt_nmi_mode(lvt0_val)) { |
| 767 | if (!nmi_wd_enabled) { |
| 768 | apic_debug("Receive NMI setting on APIC_LVT0 " |
| 769 | "for cpu %d\n", apic->vcpu->vcpu_id); |
| 770 | apic->vcpu->kvm->arch.vapics_in_nmi_mode++; |
| 771 | } |
| 772 | } else if (nmi_wd_enabled) |
| 773 | apic->vcpu->kvm->arch.vapics_in_nmi_mode--; |
| 774 | } |
| 775 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 776 | 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] | 777 | { |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 778 | int ret = 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 779 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 780 | trace_kvm_apic_write(reg, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 781 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 782 | switch (reg) { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 783 | case APIC_ID: /* Local APIC ID */ |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 784 | if (!apic_x2apic_mode(apic)) |
| 785 | apic_set_reg(apic, APIC_ID, val); |
| 786 | else |
| 787 | ret = 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 788 | break; |
| 789 | |
| 790 | case APIC_TASKPRI: |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 791 | report_tpr_access(apic, true); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 792 | apic_set_tpr(apic, val & 0xff); |
| 793 | break; |
| 794 | |
| 795 | case APIC_EOI: |
| 796 | apic_set_eoi(apic); |
| 797 | break; |
| 798 | |
| 799 | case APIC_LDR: |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 800 | if (!apic_x2apic_mode(apic)) |
| 801 | apic_set_reg(apic, APIC_LDR, val & APIC_LDR_MASK); |
| 802 | else |
| 803 | ret = 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 804 | break; |
| 805 | |
| 806 | case APIC_DFR: |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 807 | if (!apic_x2apic_mode(apic)) |
| 808 | apic_set_reg(apic, APIC_DFR, val | 0x0FFFFFFF); |
| 809 | else |
| 810 | ret = 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 811 | break; |
| 812 | |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 813 | case APIC_SPIV: { |
| 814 | u32 mask = 0x3ff; |
| 815 | if (apic_get_reg(apic, APIC_LVR) & APIC_LVR_DIRECTED_EOI) |
| 816 | mask |= APIC_SPIV_DIRECTED_EOI; |
| 817 | apic_set_reg(apic, APIC_SPIV, val & mask); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 818 | if (!(val & APIC_SPIV_APIC_ENABLED)) { |
| 819 | int i; |
| 820 | u32 lvt_val; |
| 821 | |
| 822 | for (i = 0; i < APIC_LVT_NUM; i++) { |
| 823 | lvt_val = apic_get_reg(apic, |
| 824 | APIC_LVTT + 0x10 * i); |
| 825 | apic_set_reg(apic, APIC_LVTT + 0x10 * i, |
| 826 | lvt_val | APIC_LVT_MASKED); |
| 827 | } |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 828 | atomic_set(&apic->lapic_timer.pending, 0); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 829 | |
| 830 | } |
| 831 | break; |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 832 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 833 | case APIC_ICR: |
| 834 | /* No delay here, so we always clear the pending bit */ |
| 835 | apic_set_reg(apic, APIC_ICR, val & ~(1 << 12)); |
| 836 | apic_send_ipi(apic); |
| 837 | break; |
| 838 | |
| 839 | case APIC_ICR2: |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 840 | if (!apic_x2apic_mode(apic)) |
| 841 | val &= 0xff000000; |
| 842 | apic_set_reg(apic, APIC_ICR2, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 843 | break; |
| 844 | |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 845 | case APIC_LVT0: |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 846 | apic_manage_nmi_watchdog(apic, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 847 | case APIC_LVTTHMR: |
| 848 | case APIC_LVTPC: |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 849 | case APIC_LVT1: |
| 850 | case APIC_LVTERR: |
| 851 | /* TODO: Check vector */ |
| 852 | if (!apic_sw_enabled(apic)) |
| 853 | val |= APIC_LVT_MASKED; |
| 854 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 855 | val &= apic_lvt_mask[(reg - APIC_LVTT) >> 4]; |
| 856 | apic_set_reg(apic, reg, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 857 | |
| 858 | break; |
| 859 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 860 | case APIC_LVTT: |
| 861 | if ((apic_get_reg(apic, APIC_LVTT) & |
| 862 | apic->lapic_timer.timer_mode_mask) != |
| 863 | (val & apic->lapic_timer.timer_mode_mask)) |
| 864 | hrtimer_cancel(&apic->lapic_timer.timer); |
| 865 | |
| 866 | if (!apic_sw_enabled(apic)) |
| 867 | val |= APIC_LVT_MASKED; |
| 868 | val &= (apic_lvt_mask[0] | apic->lapic_timer.timer_mode_mask); |
| 869 | apic_set_reg(apic, APIC_LVTT, val); |
| 870 | break; |
| 871 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 872 | case APIC_TMICT: |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 873 | if (apic_lvtt_tscdeadline(apic)) |
| 874 | break; |
| 875 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 876 | hrtimer_cancel(&apic->lapic_timer.timer); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 877 | apic_set_reg(apic, APIC_TMICT, val); |
| 878 | start_apic_timer(apic); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 879 | break; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 880 | |
| 881 | case APIC_TDCR: |
| 882 | if (val & 4) |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 883 | apic_debug("KVM_WRITE:TDCR %x\n", val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 884 | apic_set_reg(apic, APIC_TDCR, val); |
| 885 | update_divide_count(apic); |
| 886 | break; |
| 887 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 888 | case APIC_ESR: |
| 889 | if (apic_x2apic_mode(apic) && val != 0) { |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 890 | apic_debug("KVM_WRITE:ESR not zero %x\n", val); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 891 | ret = 1; |
| 892 | } |
| 893 | break; |
| 894 | |
| 895 | case APIC_SELF_IPI: |
| 896 | if (apic_x2apic_mode(apic)) { |
| 897 | apic_reg_write(apic, APIC_ICR, 0x40000 | (val & 0xff)); |
| 898 | } else |
| 899 | ret = 1; |
| 900 | break; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 901 | default: |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 902 | ret = 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 903 | break; |
| 904 | } |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 905 | if (ret) |
| 906 | apic_debug("Local APIC Write to read-only register %x\n", reg); |
| 907 | return ret; |
| 908 | } |
| 909 | |
| 910 | static int apic_mmio_write(struct kvm_io_device *this, |
| 911 | gpa_t address, int len, const void *data) |
| 912 | { |
| 913 | struct kvm_lapic *apic = to_lapic(this); |
| 914 | unsigned int offset = address - apic->base_address; |
| 915 | u32 val; |
| 916 | |
| 917 | if (!apic_mmio_in_range(apic, address)) |
| 918 | return -EOPNOTSUPP; |
| 919 | |
| 920 | /* |
| 921 | * APIC register must be aligned on 128-bits boundary. |
| 922 | * 32/64/128 bits registers must be accessed thru 32 bits. |
| 923 | * Refer SDM 8.4.1 |
| 924 | */ |
| 925 | if (len != 4 || (offset & 0xf)) { |
| 926 | /* Don't shout loud, $infamous_os would cause only noise. */ |
| 927 | apic_debug("apic write: bad size=%d %lx\n", len, (long)address); |
Sheng Yang | 756975b | 2009-07-06 11:05:39 +0800 | [diff] [blame] | 928 | return 0; |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 929 | } |
| 930 | |
| 931 | val = *(u32*)data; |
| 932 | |
| 933 | /* too common printing */ |
| 934 | if (offset != APIC_EOI) |
| 935 | apic_debug("%s: offset 0x%x with length 0x%x, and value is " |
| 936 | "0x%x\n", __func__, offset, len, val); |
| 937 | |
| 938 | apic_reg_write(apic, offset & 0xff0, val); |
| 939 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 940 | return 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 941 | } |
| 942 | |
Kevin Tian | 58fbbf2 | 2011-08-30 13:56:17 +0300 | [diff] [blame] | 943 | void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu) |
| 944 | { |
| 945 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 946 | |
| 947 | if (apic) |
| 948 | apic_reg_write(vcpu->arch.apic, APIC_EOI, 0); |
| 949 | } |
| 950 | EXPORT_SYMBOL_GPL(kvm_lapic_set_eoi); |
| 951 | |
Rusty Russell | d589444 | 2007-10-08 10:48:30 +1000 | [diff] [blame] | 952 | void kvm_free_lapic(struct kvm_vcpu *vcpu) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 953 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 954 | if (!vcpu->arch.apic) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 955 | return; |
| 956 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 957 | hrtimer_cancel(&vcpu->arch.apic->lapic_timer.timer); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 958 | |
Takuya Yoshikawa | afc2018 | 2011-03-05 12:40:20 +0900 | [diff] [blame] | 959 | if (vcpu->arch.apic->regs) |
| 960 | free_page((unsigned long)vcpu->arch.apic->regs); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 961 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 962 | kfree(vcpu->arch.apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 963 | } |
| 964 | |
| 965 | /* |
| 966 | *---------------------------------------------------------------------- |
| 967 | * LAPIC interface |
| 968 | *---------------------------------------------------------------------- |
| 969 | */ |
| 970 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 971 | u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu) |
| 972 | { |
| 973 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 974 | if (!apic) |
| 975 | return 0; |
| 976 | |
| 977 | if (apic_lvtt_oneshot(apic) || apic_lvtt_period(apic)) |
| 978 | return 0; |
| 979 | |
| 980 | return apic->lapic_timer.tscdeadline; |
| 981 | } |
| 982 | |
| 983 | void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data) |
| 984 | { |
| 985 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 986 | if (!apic) |
| 987 | return; |
| 988 | |
| 989 | if (apic_lvtt_oneshot(apic) || apic_lvtt_period(apic)) |
| 990 | return; |
| 991 | |
| 992 | hrtimer_cancel(&apic->lapic_timer.timer); |
| 993 | apic->lapic_timer.tscdeadline = data; |
| 994 | start_apic_timer(apic); |
| 995 | } |
| 996 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 997 | void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8) |
| 998 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 999 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1000 | |
| 1001 | if (!apic) |
| 1002 | return; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1003 | apic_set_tpr(apic, ((cr8 & 0x0f) << 4) |
| 1004 | | (apic_get_reg(apic, APIC_TASKPRI) & 4)); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1005 | } |
| 1006 | |
| 1007 | u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu) |
| 1008 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1009 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1010 | u64 tpr; |
| 1011 | |
| 1012 | if (!apic) |
| 1013 | return 0; |
| 1014 | tpr = (u64) apic_get_reg(apic, APIC_TASKPRI); |
| 1015 | |
| 1016 | return (tpr & 0xf0) >> 4; |
| 1017 | } |
| 1018 | |
| 1019 | void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value) |
| 1020 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1021 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1022 | |
| 1023 | if (!apic) { |
| 1024 | value |= MSR_IA32_APICBASE_BSP; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1025 | vcpu->arch.apic_base = value; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1026 | return; |
| 1027 | } |
Gleb Natapov | c5af89b | 2009-06-09 15:56:26 +0300 | [diff] [blame] | 1028 | |
| 1029 | if (!kvm_vcpu_is_bsp(apic->vcpu)) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1030 | value &= ~MSR_IA32_APICBASE_BSP; |
| 1031 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1032 | vcpu->arch.apic_base = value; |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1033 | if (apic_x2apic_mode(apic)) { |
| 1034 | u32 id = kvm_apic_id(apic); |
| 1035 | u32 ldr = ((id & ~0xf) << 16) | (1 << (id & 0xf)); |
| 1036 | apic_set_reg(apic, APIC_LDR, ldr); |
| 1037 | } |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1038 | apic->base_address = apic->vcpu->arch.apic_base & |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1039 | MSR_IA32_APICBASE_BASE; |
| 1040 | |
| 1041 | /* with FSB delivery interrupt, we can restart APIC functionality */ |
| 1042 | 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] | 1043 | "0x%lx.\n", apic->vcpu->arch.apic_base, apic->base_address); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1044 | |
| 1045 | } |
| 1046 | |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 1047 | void kvm_lapic_reset(struct kvm_vcpu *vcpu) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1048 | { |
| 1049 | struct kvm_lapic *apic; |
| 1050 | int i; |
| 1051 | |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 1052 | apic_debug("%s\n", __func__); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1053 | |
| 1054 | ASSERT(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1055 | apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1056 | ASSERT(apic != NULL); |
| 1057 | |
| 1058 | /* 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] | 1059 | hrtimer_cancel(&apic->lapic_timer.timer); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1060 | |
| 1061 | apic_set_reg(apic, APIC_ID, vcpu->vcpu_id << 24); |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 1062 | kvm_apic_set_version(apic->vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1063 | |
| 1064 | for (i = 0; i < APIC_LVT_NUM; i++) |
| 1065 | apic_set_reg(apic, APIC_LVTT + 0x10 * i, APIC_LVT_MASKED); |
Qing He | 40487c6 | 2007-09-17 14:47:13 +0800 | [diff] [blame] | 1066 | apic_set_reg(apic, APIC_LVT0, |
| 1067 | SET_APIC_DELIVERY_MODE(0, APIC_MODE_EXTINT)); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1068 | |
| 1069 | apic_set_reg(apic, APIC_DFR, 0xffffffffU); |
| 1070 | apic_set_reg(apic, APIC_SPIV, 0xff); |
| 1071 | apic_set_reg(apic, APIC_TASKPRI, 0); |
| 1072 | apic_set_reg(apic, APIC_LDR, 0); |
| 1073 | apic_set_reg(apic, APIC_ESR, 0); |
| 1074 | apic_set_reg(apic, APIC_ICR, 0); |
| 1075 | apic_set_reg(apic, APIC_ICR2, 0); |
| 1076 | apic_set_reg(apic, APIC_TDCR, 0); |
| 1077 | apic_set_reg(apic, APIC_TMICT, 0); |
| 1078 | for (i = 0; i < 8; i++) { |
| 1079 | apic_set_reg(apic, APIC_IRR + 0x10 * i, 0); |
| 1080 | apic_set_reg(apic, APIC_ISR + 0x10 * i, 0); |
| 1081 | apic_set_reg(apic, APIC_TMR + 0x10 * i, 0); |
| 1082 | } |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 1083 | apic->irr_pending = false; |
Kevin Pedretti | b33ac88 | 2007-10-21 08:54:53 +0200 | [diff] [blame] | 1084 | update_divide_count(apic); |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1085 | atomic_set(&apic->lapic_timer.pending, 0); |
Gleb Natapov | c5af89b | 2009-06-09 15:56:26 +0300 | [diff] [blame] | 1086 | if (kvm_vcpu_is_bsp(vcpu)) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1087 | vcpu->arch.apic_base |= MSR_IA32_APICBASE_BSP; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1088 | apic_update_ppr(apic); |
| 1089 | |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 1090 | vcpu->arch.apic_arb_prio = 0; |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 1091 | vcpu->arch.apic_attention = 0; |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 1092 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1093 | apic_debug(KERN_INFO "%s: vcpu=%p, id=%d, base_msr=" |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 1094 | "0x%016" PRIx64 ", base_address=0x%0lx.\n", __func__, |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1095 | vcpu, kvm_apic_id(apic), |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1096 | vcpu->arch.apic_base, apic->base_address); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1097 | } |
| 1098 | |
Gleb Natapov | 343f94f | 2009-03-05 16:34:54 +0200 | [diff] [blame] | 1099 | bool kvm_apic_present(struct kvm_vcpu *vcpu) |
| 1100 | { |
| 1101 | return vcpu->arch.apic && apic_hw_enabled(vcpu->arch.apic); |
| 1102 | } |
| 1103 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1104 | int kvm_lapic_enabled(struct kvm_vcpu *vcpu) |
| 1105 | { |
Gleb Natapov | 343f94f | 2009-03-05 16:34:54 +0200 | [diff] [blame] | 1106 | return kvm_apic_present(vcpu) && apic_sw_enabled(vcpu->arch.apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1107 | } |
| 1108 | |
| 1109 | /* |
| 1110 | *---------------------------------------------------------------------- |
| 1111 | * timer interface |
| 1112 | *---------------------------------------------------------------------- |
| 1113 | */ |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1114 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1115 | static bool lapic_is_periodic(struct kvm_timer *ktimer) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1116 | { |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1117 | struct kvm_lapic *apic = container_of(ktimer, struct kvm_lapic, |
| 1118 | lapic_timer); |
| 1119 | return apic_lvtt_period(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1120 | } |
| 1121 | |
Marcelo Tosatti | 3d80840 | 2008-04-11 14:53:26 -0300 | [diff] [blame] | 1122 | int apic_has_pending_timer(struct kvm_vcpu *vcpu) |
| 1123 | { |
| 1124 | struct kvm_lapic *lapic = vcpu->arch.apic; |
| 1125 | |
Marcelo Tosatti | 54aaace | 2008-05-14 02:29:06 -0300 | [diff] [blame] | 1126 | if (lapic && apic_enabled(lapic) && apic_lvt_enabled(lapic, APIC_LVTT)) |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1127 | return atomic_read(&lapic->lapic_timer.pending); |
Marcelo Tosatti | 3d80840 | 2008-04-11 14:53:26 -0300 | [diff] [blame] | 1128 | |
| 1129 | return 0; |
| 1130 | } |
| 1131 | |
Avi Kivity | 8934208 | 2011-11-10 14:57:21 +0200 | [diff] [blame] | 1132 | int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type) |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1133 | { |
Jan Kiszka | 8fdb235 | 2008-10-20 10:20:02 +0200 | [diff] [blame] | 1134 | u32 reg = apic_get_reg(apic, lvt_type); |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 1135 | int vector, mode, trig_mode; |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1136 | |
Jan Kiszka | 8fdb235 | 2008-10-20 10:20:02 +0200 | [diff] [blame] | 1137 | if (apic_hw_enabled(apic) && !(reg & APIC_LVT_MASKED)) { |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 1138 | vector = reg & APIC_VECTOR_MASK; |
| 1139 | mode = reg & APIC_MODE_MASK; |
| 1140 | trig_mode = reg & APIC_LVT_LEVEL_TRIGGER; |
| 1141 | return __apic_accept_irq(apic, mode, vector, 1, trig_mode); |
| 1142 | } |
| 1143 | return 0; |
| 1144 | } |
| 1145 | |
Jan Kiszka | 8fdb235 | 2008-10-20 10:20:02 +0200 | [diff] [blame] | 1146 | void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu) |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 1147 | { |
Jan Kiszka | 8fdb235 | 2008-10-20 10:20:02 +0200 | [diff] [blame] | 1148 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1149 | |
| 1150 | if (apic) |
| 1151 | kvm_apic_local_deliver(apic, APIC_LVT0); |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1152 | } |
| 1153 | |
Hannes Eder | 386eb6e | 2009-03-10 22:51:09 +0100 | [diff] [blame] | 1154 | static struct kvm_timer_ops lapic_timer_ops = { |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1155 | .is_periodic = lapic_is_periodic, |
| 1156 | }; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1157 | |
Gregory Haskins | d76685c4 | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 1158 | static const struct kvm_io_device_ops apic_mmio_ops = { |
| 1159 | .read = apic_mmio_read, |
| 1160 | .write = apic_mmio_write, |
Gregory Haskins | d76685c4 | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 1161 | }; |
| 1162 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1163 | int kvm_create_lapic(struct kvm_vcpu *vcpu) |
| 1164 | { |
| 1165 | struct kvm_lapic *apic; |
| 1166 | |
| 1167 | ASSERT(vcpu != NULL); |
| 1168 | apic_debug("apic_init %d\n", vcpu->vcpu_id); |
| 1169 | |
| 1170 | apic = kzalloc(sizeof(*apic), GFP_KERNEL); |
| 1171 | if (!apic) |
| 1172 | goto nomem; |
| 1173 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1174 | vcpu->arch.apic = apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1175 | |
Takuya Yoshikawa | afc2018 | 2011-03-05 12:40:20 +0900 | [diff] [blame] | 1176 | apic->regs = (void *)get_zeroed_page(GFP_KERNEL); |
| 1177 | if (!apic->regs) { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1178 | printk(KERN_ERR "malloc apic regs error for vcpu %x\n", |
| 1179 | vcpu->vcpu_id); |
Rusty Russell | d589444 | 2007-10-08 10:48:30 +1000 | [diff] [blame] | 1180 | goto nomem_free_apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1181 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1182 | apic->vcpu = vcpu; |
| 1183 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1184 | hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC, |
| 1185 | HRTIMER_MODE_ABS); |
| 1186 | apic->lapic_timer.timer.function = kvm_timer_fn; |
| 1187 | apic->lapic_timer.t_ops = &lapic_timer_ops; |
| 1188 | apic->lapic_timer.kvm = vcpu->kvm; |
Gleb Natapov | 1ed0ce00 | 2009-06-09 15:56:27 +0300 | [diff] [blame] | 1189 | apic->lapic_timer.vcpu = vcpu; |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1190 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1191 | apic->base_address = APIC_DEFAULT_PHYS_BASE; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1192 | vcpu->arch.apic_base = APIC_DEFAULT_PHYS_BASE; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1193 | |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 1194 | kvm_lapic_reset(vcpu); |
Gregory Haskins | d76685c4 | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 1195 | kvm_iodevice_init(&apic->dev, &apic_mmio_ops); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1196 | |
| 1197 | return 0; |
Rusty Russell | d589444 | 2007-10-08 10:48:30 +1000 | [diff] [blame] | 1198 | nomem_free_apic: |
| 1199 | kfree(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1200 | nomem: |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1201 | return -ENOMEM; |
| 1202 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1203 | |
| 1204 | int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu) |
| 1205 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1206 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1207 | int highest_irr; |
| 1208 | |
| 1209 | if (!apic || !apic_enabled(apic)) |
| 1210 | return -1; |
| 1211 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1212 | apic_update_ppr(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1213 | highest_irr = apic_find_highest_irr(apic); |
| 1214 | if ((highest_irr == -1) || |
| 1215 | ((highest_irr & 0xF0) <= apic_get_reg(apic, APIC_PROCPRI))) |
| 1216 | return -1; |
| 1217 | return highest_irr; |
| 1218 | } |
| 1219 | |
Qing He | 40487c6 | 2007-09-17 14:47:13 +0800 | [diff] [blame] | 1220 | int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu) |
| 1221 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1222 | u32 lvt0 = apic_get_reg(vcpu->arch.apic, APIC_LVT0); |
Qing He | 40487c6 | 2007-09-17 14:47:13 +0800 | [diff] [blame] | 1223 | int r = 0; |
| 1224 | |
Chris Lalancette | e7dca5c | 2010-06-16 17:11:12 -0400 | [diff] [blame] | 1225 | if (!apic_hw_enabled(vcpu->arch.apic)) |
| 1226 | r = 1; |
| 1227 | if ((lvt0 & APIC_LVT_MASKED) == 0 && |
| 1228 | GET_APIC_DELIVERY_MODE(lvt0) == APIC_MODE_EXTINT) |
| 1229 | r = 1; |
Qing He | 40487c6 | 2007-09-17 14:47:13 +0800 | [diff] [blame] | 1230 | return r; |
| 1231 | } |
| 1232 | |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1233 | void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu) |
| 1234 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1235 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1236 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1237 | if (apic && atomic_read(&apic->lapic_timer.pending) > 0) { |
Jan Kiszka | 8fdb235 | 2008-10-20 10:20:02 +0200 | [diff] [blame] | 1238 | if (kvm_apic_local_deliver(apic, APIC_LVTT)) |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1239 | atomic_dec(&apic->lapic_timer.pending); |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1240 | } |
| 1241 | } |
| 1242 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1243 | int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu) |
| 1244 | { |
| 1245 | int vector = kvm_apic_has_interrupt(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1246 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1247 | |
| 1248 | if (vector == -1) |
| 1249 | return -1; |
| 1250 | |
| 1251 | apic_set_vector(vector, apic->regs + APIC_ISR); |
| 1252 | apic_update_ppr(apic); |
| 1253 | apic_clear_irr(vector, apic); |
| 1254 | return vector; |
| 1255 | } |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 1256 | |
| 1257 | void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu) |
| 1258 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1259 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 1260 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1261 | apic->base_address = vcpu->arch.apic_base & |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 1262 | MSR_IA32_APICBASE_BASE; |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 1263 | kvm_apic_set_version(vcpu); |
| 1264 | |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 1265 | apic_update_ppr(apic); |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1266 | hrtimer_cancel(&apic->lapic_timer.timer); |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 1267 | update_divide_count(apic); |
| 1268 | start_apic_timer(apic); |
Marcelo Tosatti | 6e24a6e | 2009-12-14 17:37:35 -0200 | [diff] [blame] | 1269 | apic->irr_pending = true; |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 1270 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 1271 | } |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 1272 | |
Avi Kivity | 2f52d58 | 2008-01-16 12:49:30 +0200 | [diff] [blame] | 1273 | void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 1274 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1275 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 1276 | struct hrtimer *timer; |
| 1277 | |
| 1278 | if (!apic) |
| 1279 | return; |
| 1280 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1281 | timer = &apic->lapic_timer.timer; |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 1282 | if (hrtimer_cancel(timer)) |
Arjan van de Ven | beb20d52 | 2008-09-01 14:55:57 -0700 | [diff] [blame] | 1283 | hrtimer_start_expires(timer, HRTIMER_MODE_ABS); |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 1284 | } |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1285 | |
| 1286 | void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu) |
| 1287 | { |
| 1288 | u32 data; |
| 1289 | void *vapic; |
| 1290 | |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 1291 | if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention)) |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1292 | return; |
| 1293 | |
Cong Wang | 8fd75e1 | 2011-11-25 23:14:17 +0800 | [diff] [blame] | 1294 | vapic = kmap_atomic(vcpu->arch.apic->vapic_page); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1295 | data = *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr)); |
Cong Wang | 8fd75e1 | 2011-11-25 23:14:17 +0800 | [diff] [blame] | 1296 | kunmap_atomic(vapic); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1297 | |
| 1298 | apic_set_tpr(vcpu->arch.apic, data & 0xff); |
| 1299 | } |
| 1300 | |
| 1301 | void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu) |
| 1302 | { |
| 1303 | u32 data, tpr; |
| 1304 | int max_irr, max_isr; |
| 1305 | struct kvm_lapic *apic; |
| 1306 | void *vapic; |
| 1307 | |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 1308 | if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention)) |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1309 | return; |
| 1310 | |
| 1311 | apic = vcpu->arch.apic; |
| 1312 | tpr = apic_get_reg(apic, APIC_TASKPRI) & 0xff; |
| 1313 | max_irr = apic_find_highest_irr(apic); |
| 1314 | if (max_irr < 0) |
| 1315 | max_irr = 0; |
| 1316 | max_isr = apic_find_highest_isr(apic); |
| 1317 | if (max_isr < 0) |
| 1318 | max_isr = 0; |
| 1319 | data = (tpr & 0xff) | ((max_isr & 0xf0) << 8) | (max_irr << 24); |
| 1320 | |
Cong Wang | 8fd75e1 | 2011-11-25 23:14:17 +0800 | [diff] [blame] | 1321 | vapic = kmap_atomic(vcpu->arch.apic->vapic_page); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1322 | *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr)) = data; |
Cong Wang | 8fd75e1 | 2011-11-25 23:14:17 +0800 | [diff] [blame] | 1323 | kunmap_atomic(vapic); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1324 | } |
| 1325 | |
| 1326 | void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr) |
| 1327 | { |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1328 | vcpu->arch.apic->vapic_addr = vapic_addr; |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 1329 | if (vapic_addr) |
| 1330 | __set_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention); |
| 1331 | else |
| 1332 | __clear_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1333 | } |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1334 | |
| 1335 | int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 1336 | { |
| 1337 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1338 | u32 reg = (msr - APIC_BASE_MSR) << 4; |
| 1339 | |
| 1340 | if (!irqchip_in_kernel(vcpu->kvm) || !apic_x2apic_mode(apic)) |
| 1341 | return 1; |
| 1342 | |
| 1343 | /* if this is ICR write vector before command */ |
| 1344 | if (msr == 0x830) |
| 1345 | apic_reg_write(apic, APIC_ICR2, (u32)(data >> 32)); |
| 1346 | return apic_reg_write(apic, reg, (u32)data); |
| 1347 | } |
| 1348 | |
| 1349 | int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data) |
| 1350 | { |
| 1351 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1352 | u32 reg = (msr - APIC_BASE_MSR) << 4, low, high = 0; |
| 1353 | |
| 1354 | if (!irqchip_in_kernel(vcpu->kvm) || !apic_x2apic_mode(apic)) |
| 1355 | return 1; |
| 1356 | |
| 1357 | if (apic_reg_read(apic, reg, 4, &low)) |
| 1358 | return 1; |
| 1359 | if (msr == 0x830) |
| 1360 | apic_reg_read(apic, APIC_ICR2, 4, &high); |
| 1361 | |
| 1362 | *data = (((u64)high) << 32) | low; |
| 1363 | |
| 1364 | return 0; |
| 1365 | } |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 1366 | |
| 1367 | int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 reg, u64 data) |
| 1368 | { |
| 1369 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1370 | |
| 1371 | if (!irqchip_in_kernel(vcpu->kvm)) |
| 1372 | return 1; |
| 1373 | |
| 1374 | /* if this is ICR write vector before command */ |
| 1375 | if (reg == APIC_ICR) |
| 1376 | apic_reg_write(apic, APIC_ICR2, (u32)(data >> 32)); |
| 1377 | return apic_reg_write(apic, reg, (u32)data); |
| 1378 | } |
| 1379 | |
| 1380 | int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 reg, u64 *data) |
| 1381 | { |
| 1382 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1383 | u32 low, high = 0; |
| 1384 | |
| 1385 | if (!irqchip_in_kernel(vcpu->kvm)) |
| 1386 | return 1; |
| 1387 | |
| 1388 | if (apic_reg_read(apic, reg, 4, &low)) |
| 1389 | return 1; |
| 1390 | if (reg == APIC_ICR) |
| 1391 | apic_reg_read(apic, APIC_ICR2, 4, &high); |
| 1392 | |
| 1393 | *data = (((u64)high) << 32) | low; |
| 1394 | |
| 1395 | return 0; |
| 1396 | } |