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> |
Paul Gortmaker | 1767e93 | 2016-07-13 20:19:00 -0400 | [diff] [blame] | 28 | #include <linux/export.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 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 62 | /* 14 is the version for Xeon and Pentium 8.4.8*/ |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 63 | #define APIC_VERSION (0x14UL | ((KVM_APIC_LVT_NUM - 1) << 16)) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 64 | #define LAPIC_MMIO_LENGTH (1 << 12) |
| 65 | /* followed define is not in apicdef.h */ |
| 66 | #define APIC_SHORT_MASK 0xc0000 |
| 67 | #define APIC_DEST_NOSHORT 0x0 |
| 68 | #define APIC_DEST_MASK 0x800 |
| 69 | #define MAX_APIC_VECTOR 256 |
Takuya Yoshikawa | ecba9a5 | 2012-09-05 19:30:01 +0900 | [diff] [blame] | 70 | #define APIC_VECTORS_PER_REG 32 |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 71 | |
Nadav Amit | 394457a | 2014-10-03 00:30:52 +0300 | [diff] [blame] | 72 | #define APIC_BROADCAST 0xFF |
| 73 | #define X2APIC_BROADCAST 0xFFFFFFFFul |
| 74 | |
Michael S. Tsirkin | a0c9a822 | 2012-04-11 18:49:55 +0300 | [diff] [blame] | 75 | static inline int apic_test_vector(int vec, void *bitmap) |
| 76 | { |
| 77 | return test_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 78 | } |
| 79 | |
Yang Zhang | 1060691 | 2013-04-11 19:21:38 +0800 | [diff] [blame] | 80 | bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector) |
| 81 | { |
| 82 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 83 | |
| 84 | return apic_test_vector(vector, apic->regs + APIC_ISR) || |
| 85 | apic_test_vector(vector, apic->regs + APIC_IRR); |
| 86 | } |
| 87 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 88 | static inline void apic_clear_vector(int vec, void *bitmap) |
| 89 | { |
| 90 | clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 91 | } |
| 92 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 93 | static inline int __apic_test_and_set_vector(int vec, void *bitmap) |
| 94 | { |
| 95 | return __test_and_set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 96 | } |
| 97 | |
| 98 | static inline int __apic_test_and_clear_vector(int vec, void *bitmap) |
| 99 | { |
| 100 | return __test_and_clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| 101 | } |
| 102 | |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 103 | struct static_key_deferred apic_hw_disabled __read_mostly; |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 104 | struct static_key_deferred apic_sw_disabled __read_mostly; |
| 105 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 106 | static inline int apic_enabled(struct kvm_lapic *apic) |
| 107 | { |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 108 | return kvm_apic_sw_enabled(apic) && kvm_apic_hw_enabled(apic); |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 109 | } |
| 110 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 111 | #define LVT_MASK \ |
| 112 | (APIC_LVT_MASKED | APIC_SEND_PENDING | APIC_VECTOR_MASK) |
| 113 | |
| 114 | #define LINT_MASK \ |
| 115 | (LVT_MASK | APIC_MODE_MASK | APIC_INPUT_POLARITY | \ |
| 116 | APIC_LVT_REMOTE_IRR | APIC_LVT_LEVEL_TRIGGER) |
| 117 | |
Radim Krčmář | 6e50043 | 2016-12-15 18:06:46 +0100 | [diff] [blame] | 118 | static inline u8 kvm_xapic_id(struct kvm_lapic *apic) |
| 119 | { |
| 120 | return kvm_lapic_get_reg(apic, APIC_ID) >> 24; |
| 121 | } |
| 122 | |
| 123 | static inline u32 kvm_x2apic_id(struct kvm_lapic *apic) |
| 124 | { |
| 125 | return apic->vcpu->vcpu_id; |
| 126 | } |
| 127 | |
Radim Krčmář | e45115b | 2016-07-12 22:09:19 +0200 | [diff] [blame] | 128 | static inline bool kvm_apic_map_get_logical_dest(struct kvm_apic_map *map, |
| 129 | u32 dest_id, struct kvm_lapic ***cluster, u16 *mask) { |
| 130 | switch (map->mode) { |
| 131 | case KVM_APIC_MODE_X2APIC: { |
| 132 | u32 offset = (dest_id >> 16) * 16; |
Radim Krčmář | 0ca52e7 | 2016-07-12 22:09:20 +0200 | [diff] [blame] | 133 | u32 max_apic_id = map->max_apic_id; |
Radim Krčmář | 3548a25 | 2015-02-12 19:41:33 +0100 | [diff] [blame] | 134 | |
Radim Krčmář | e45115b | 2016-07-12 22:09:19 +0200 | [diff] [blame] | 135 | if (offset <= max_apic_id) { |
| 136 | u8 cluster_size = min(max_apic_id - offset + 1, 16U); |
Radim Krčmář | 3b5a5ff | 2015-02-12 19:41:34 +0100 | [diff] [blame] | 137 | |
Radim Krčmář | e45115b | 2016-07-12 22:09:19 +0200 | [diff] [blame] | 138 | *cluster = &map->phys_map[offset]; |
| 139 | *mask = dest_id & (0xffff >> (16 - cluster_size)); |
| 140 | } else { |
| 141 | *mask = 0; |
| 142 | } |
Radim Krčmář | 3b5a5ff | 2015-02-12 19:41:34 +0100 | [diff] [blame] | 143 | |
Radim Krčmář | e45115b | 2016-07-12 22:09:19 +0200 | [diff] [blame] | 144 | return true; |
| 145 | } |
| 146 | case KVM_APIC_MODE_XAPIC_FLAT: |
| 147 | *cluster = map->xapic_flat_map; |
| 148 | *mask = dest_id & 0xff; |
| 149 | return true; |
| 150 | case KVM_APIC_MODE_XAPIC_CLUSTER: |
Radim Krčmář | 444fdad | 2016-11-22 20:20:14 +0100 | [diff] [blame] | 151 | *cluster = map->xapic_cluster_map[(dest_id >> 4) & 0xf]; |
Radim Krčmář | e45115b | 2016-07-12 22:09:19 +0200 | [diff] [blame] | 152 | *mask = dest_id & 0xf; |
| 153 | return true; |
| 154 | default: |
| 155 | /* Not optimized. */ |
| 156 | return false; |
| 157 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 158 | } |
| 159 | |
Radim Krčmář | af1bae5 | 2016-07-12 22:09:30 +0200 | [diff] [blame] | 160 | static void kvm_apic_map_free(struct rcu_head *rcu) |
Radim Krčmář | 3b5a5ff | 2015-02-12 19:41:34 +0100 | [diff] [blame] | 161 | { |
Radim Krčmář | af1bae5 | 2016-07-12 22:09:30 +0200 | [diff] [blame] | 162 | struct kvm_apic_map *map = container_of(rcu, struct kvm_apic_map, rcu); |
Radim Krčmář | 3b5a5ff | 2015-02-12 19:41:34 +0100 | [diff] [blame] | 163 | |
Radim Krčmář | af1bae5 | 2016-07-12 22:09:30 +0200 | [diff] [blame] | 164 | kvfree(map); |
Radim Krčmář | 3b5a5ff | 2015-02-12 19:41:34 +0100 | [diff] [blame] | 165 | } |
| 166 | |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 167 | static void recalculate_apic_map(struct kvm *kvm) |
| 168 | { |
| 169 | struct kvm_apic_map *new, *old = NULL; |
| 170 | struct kvm_vcpu *vcpu; |
| 171 | int i; |
Radim Krčmář | 6e50043 | 2016-12-15 18:06:46 +0100 | [diff] [blame] | 172 | u32 max_id = 255; /* enough space for any xAPIC ID */ |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 173 | |
| 174 | mutex_lock(&kvm->arch.apic_map_lock); |
| 175 | |
Radim Krčmář | 0ca52e7 | 2016-07-12 22:09:20 +0200 | [diff] [blame] | 176 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 177 | if (kvm_apic_present(vcpu)) |
Radim Krčmář | 6e50043 | 2016-12-15 18:06:46 +0100 | [diff] [blame] | 178 | max_id = max(max_id, kvm_x2apic_id(vcpu->arch.apic)); |
Radim Krčmář | 0ca52e7 | 2016-07-12 22:09:20 +0200 | [diff] [blame] | 179 | |
Radim Krčmář | af1bae5 | 2016-07-12 22:09:30 +0200 | [diff] [blame] | 180 | new = kvm_kvzalloc(sizeof(struct kvm_apic_map) + |
| 181 | sizeof(struct kvm_lapic *) * ((u64)max_id + 1)); |
Radim Krčmář | 0ca52e7 | 2016-07-12 22:09:20 +0200 | [diff] [blame] | 182 | |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 183 | if (!new) |
| 184 | goto out; |
| 185 | |
Radim Krčmář | 0ca52e7 | 2016-07-12 22:09:20 +0200 | [diff] [blame] | 186 | new->max_apic_id = max_id; |
| 187 | |
Nadav Amit | 173beed | 2014-11-02 11:54:54 +0200 | [diff] [blame] | 188 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 189 | struct kvm_lapic *apic = vcpu->arch.apic; |
Radim Krčmář | e45115b | 2016-07-12 22:09:19 +0200 | [diff] [blame] | 190 | struct kvm_lapic **cluster; |
| 191 | u16 mask; |
Radim Krčmář | 25995e5 | 2014-11-27 23:30:19 +0100 | [diff] [blame] | 192 | u32 ldr, aid; |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 193 | |
Radim Krčmář | df04d1d | 2015-01-29 22:33:35 +0100 | [diff] [blame] | 194 | if (!kvm_apic_present(vcpu)) |
| 195 | continue; |
| 196 | |
Radim Krčmář | 6e50043 | 2016-12-15 18:06:46 +0100 | [diff] [blame] | 197 | aid = apic_x2apic_mode(apic) ? kvm_x2apic_id(apic) |
| 198 | : kvm_xapic_id(apic); |
Radim Krčmář | 0ca52e7 | 2016-07-12 22:09:20 +0200 | [diff] [blame] | 199 | if (aid <= new->max_apic_id) |
Radim Krčmář | 25995e5 | 2014-11-27 23:30:19 +0100 | [diff] [blame] | 200 | new->phys_map[aid] = apic; |
Radim Krčmář | 3548a25 | 2015-02-12 19:41:33 +0100 | [diff] [blame] | 201 | |
Radim Krčmář | 6e50043 | 2016-12-15 18:06:46 +0100 | [diff] [blame] | 202 | ldr = kvm_lapic_get_reg(apic, APIC_LDR); |
| 203 | |
Radim Krčmář | 3b5a5ff | 2015-02-12 19:41:34 +0100 | [diff] [blame] | 204 | if (apic_x2apic_mode(apic)) { |
| 205 | new->mode |= KVM_APIC_MODE_X2APIC; |
| 206 | } else if (ldr) { |
| 207 | ldr = GET_APIC_LOGICAL_ID(ldr); |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 208 | if (kvm_lapic_get_reg(apic, APIC_DFR) == APIC_DFR_FLAT) |
Radim Krčmář | 3b5a5ff | 2015-02-12 19:41:34 +0100 | [diff] [blame] | 209 | new->mode |= KVM_APIC_MODE_XAPIC_FLAT; |
| 210 | else |
| 211 | new->mode |= KVM_APIC_MODE_XAPIC_CLUSTER; |
| 212 | } |
| 213 | |
Radim Krčmář | e45115b | 2016-07-12 22:09:19 +0200 | [diff] [blame] | 214 | if (!kvm_apic_map_get_logical_dest(new, ldr, &cluster, &mask)) |
Radim Krčmář | 3548a25 | 2015-02-12 19:41:33 +0100 | [diff] [blame] | 215 | continue; |
| 216 | |
Radim Krčmář | e45115b | 2016-07-12 22:09:19 +0200 | [diff] [blame] | 217 | if (mask) |
| 218 | cluster[ffs(mask) - 1] = apic; |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 219 | } |
| 220 | out: |
| 221 | old = rcu_dereference_protected(kvm->arch.apic_map, |
| 222 | lockdep_is_held(&kvm->arch.apic_map_lock)); |
| 223 | rcu_assign_pointer(kvm->arch.apic_map, new); |
| 224 | mutex_unlock(&kvm->arch.apic_map_lock); |
| 225 | |
| 226 | if (old) |
Radim Krčmář | af1bae5 | 2016-07-12 22:09:30 +0200 | [diff] [blame] | 227 | call_rcu(&old->rcu, kvm_apic_map_free); |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 228 | |
Steve Rutherford | b053b2a | 2015-07-29 23:32:35 -0700 | [diff] [blame] | 229 | kvm_make_scan_ioapic_request(kvm); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 230 | } |
| 231 | |
Nadav Amit | 1e1b6c2 | 2014-08-19 00:03:00 +0300 | [diff] [blame] | 232 | static inline void apic_set_spiv(struct kvm_lapic *apic, u32 val) |
| 233 | { |
Radim Krčmář | e462755 | 2014-10-30 15:06:45 +0100 | [diff] [blame] | 234 | bool enabled = val & APIC_SPIV_APIC_ENABLED; |
Nadav Amit | 1e1b6c2 | 2014-08-19 00:03:00 +0300 | [diff] [blame] | 235 | |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 236 | kvm_lapic_set_reg(apic, APIC_SPIV, val); |
Radim Krčmář | e462755 | 2014-10-30 15:06:45 +0100 | [diff] [blame] | 237 | |
| 238 | if (enabled != apic->sw_enabled) { |
| 239 | apic->sw_enabled = enabled; |
| 240 | if (enabled) { |
Nadav Amit | 1e1b6c2 | 2014-08-19 00:03:00 +0300 | [diff] [blame] | 241 | static_key_slow_dec_deferred(&apic_sw_disabled); |
| 242 | recalculate_apic_map(apic->vcpu->kvm); |
| 243 | } else |
| 244 | static_key_slow_inc(&apic_sw_disabled.key); |
| 245 | } |
| 246 | } |
| 247 | |
Radim Krčmář | a92e254 | 2016-07-12 22:09:22 +0200 | [diff] [blame] | 248 | static inline void kvm_apic_set_xapic_id(struct kvm_lapic *apic, u8 id) |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 249 | { |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 250 | kvm_lapic_set_reg(apic, APIC_ID, id << 24); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 251 | recalculate_apic_map(apic->vcpu->kvm); |
| 252 | } |
| 253 | |
| 254 | static inline void kvm_apic_set_ldr(struct kvm_lapic *apic, u32 id) |
| 255 | { |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 256 | kvm_lapic_set_reg(apic, APIC_LDR, id); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 257 | recalculate_apic_map(apic->vcpu->kvm); |
| 258 | } |
| 259 | |
Radim Krčmář | a92e254 | 2016-07-12 22:09:22 +0200 | [diff] [blame] | 260 | static inline void kvm_apic_set_x2apic_id(struct kvm_lapic *apic, u32 id) |
Radim Krčmář | 257b9a5 | 2015-05-22 18:45:11 +0200 | [diff] [blame] | 261 | { |
| 262 | u32 ldr = ((id >> 4) << 16) | (1 << (id & 0xf)); |
| 263 | |
Radim Krčmář | 6e50043 | 2016-12-15 18:06:46 +0100 | [diff] [blame] | 264 | WARN_ON_ONCE(id != apic->vcpu->vcpu_id); |
| 265 | |
Radim Krčmář | a92e254 | 2016-07-12 22:09:22 +0200 | [diff] [blame] | 266 | kvm_lapic_set_reg(apic, APIC_ID, id); |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 267 | kvm_lapic_set_reg(apic, APIC_LDR, ldr); |
Radim Krčmář | 257b9a5 | 2015-05-22 18:45:11 +0200 | [diff] [blame] | 268 | recalculate_apic_map(apic->vcpu->kvm); |
| 269 | } |
| 270 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 271 | static inline int apic_lvt_enabled(struct kvm_lapic *apic, int lvt_type) |
| 272 | { |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 273 | return !(kvm_lapic_get_reg(apic, lvt_type) & APIC_LVT_MASKED); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | static inline int apic_lvt_vector(struct kvm_lapic *apic, int lvt_type) |
| 277 | { |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 278 | return kvm_lapic_get_reg(apic, lvt_type) & APIC_VECTOR_MASK; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 279 | } |
| 280 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 281 | static inline int apic_lvtt_oneshot(struct kvm_lapic *apic) |
| 282 | { |
Radim Krčmář | f30ebc3 | 2014-10-30 15:06:47 +0100 | [diff] [blame] | 283 | return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_ONESHOT; |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 284 | } |
| 285 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 286 | static inline int apic_lvtt_period(struct kvm_lapic *apic) |
| 287 | { |
Radim Krčmář | f30ebc3 | 2014-10-30 15:06:47 +0100 | [diff] [blame] | 288 | return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_PERIODIC; |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | static inline int apic_lvtt_tscdeadline(struct kvm_lapic *apic) |
| 292 | { |
Radim Krčmář | f30ebc3 | 2014-10-30 15:06:47 +0100 | [diff] [blame] | 293 | return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_TSCDEADLINE; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 294 | } |
| 295 | |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 296 | static inline int apic_lvt_nmi_mode(u32 lvt_val) |
| 297 | { |
| 298 | return (lvt_val & (APIC_MODE_MASK | APIC_LVT_MASKED)) == APIC_DM_NMI; |
| 299 | } |
| 300 | |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 301 | void kvm_apic_set_version(struct kvm_vcpu *vcpu) |
| 302 | { |
| 303 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 304 | struct kvm_cpuid_entry2 *feat; |
| 305 | u32 v = APIC_VERSION; |
| 306 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 307 | if (!lapic_in_kernel(vcpu)) |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 308 | return; |
| 309 | |
| 310 | feat = kvm_find_cpuid_entry(apic->vcpu, 0x1, 0); |
| 311 | if (feat && (feat->ecx & (1 << (X86_FEATURE_X2APIC & 31)))) |
| 312 | v |= APIC_LVR_DIRECTED_EOI; |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 313 | kvm_lapic_set_reg(apic, APIC_LVR, v); |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 314 | } |
| 315 | |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 316 | static const unsigned int apic_lvt_mask[KVM_APIC_LVT_NUM] = { |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 317 | LVT_MASK , /* part LVTT mask, timer mode mask added at runtime */ |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 318 | LVT_MASK | APIC_MODE_MASK, /* LVTTHMR */ |
| 319 | LVT_MASK | APIC_MODE_MASK, /* LVTPC */ |
| 320 | LINT_MASK, LINT_MASK, /* LVT0-1 */ |
| 321 | LVT_MASK /* LVTERR */ |
| 322 | }; |
| 323 | |
| 324 | static int find_highest_vector(void *bitmap) |
| 325 | { |
Takuya Yoshikawa | ecba9a5 | 2012-09-05 19:30:01 +0900 | [diff] [blame] | 326 | int vec; |
| 327 | u32 *reg; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 328 | |
Takuya Yoshikawa | ecba9a5 | 2012-09-05 19:30:01 +0900 | [diff] [blame] | 329 | for (vec = MAX_APIC_VECTOR - APIC_VECTORS_PER_REG; |
| 330 | vec >= 0; vec -= APIC_VECTORS_PER_REG) { |
| 331 | reg = bitmap + REG_POS(vec); |
| 332 | if (*reg) |
| 333 | return fls(*reg) - 1 + vec; |
| 334 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 335 | |
Takuya Yoshikawa | ecba9a5 | 2012-09-05 19:30:01 +0900 | [diff] [blame] | 336 | return -1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 337 | } |
| 338 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 339 | static u8 count_vectors(void *bitmap) |
| 340 | { |
Takuya Yoshikawa | ecba9a5 | 2012-09-05 19:30:01 +0900 | [diff] [blame] | 341 | int vec; |
| 342 | u32 *reg; |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 343 | u8 count = 0; |
Takuya Yoshikawa | ecba9a5 | 2012-09-05 19:30:01 +0900 | [diff] [blame] | 344 | |
| 345 | for (vec = 0; vec < MAX_APIC_VECTOR; vec += APIC_VECTORS_PER_REG) { |
| 346 | reg = bitmap + REG_POS(vec); |
| 347 | count += hweight32(*reg); |
| 348 | } |
| 349 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 350 | return count; |
| 351 | } |
| 352 | |
Wincy Van | 705699a | 2015-02-03 23:58:17 +0800 | [diff] [blame] | 353 | void __kvm_apic_update_irr(u32 *pir, void *regs) |
Yang Zhang | a20ed54 | 2013-04-11 19:25:15 +0800 | [diff] [blame] | 354 | { |
| 355 | u32 i, pir_val; |
Yang Zhang | a20ed54 | 2013-04-11 19:25:15 +0800 | [diff] [blame] | 356 | |
| 357 | for (i = 0; i <= 7; i++) { |
Paolo Bonzini | ad36109 | 2016-09-20 16:15:05 +0200 | [diff] [blame] | 358 | pir_val = READ_ONCE(pir[i]); |
| 359 | if (pir_val) { |
| 360 | pir_val = xchg(&pir[i], 0); |
Wincy Van | 705699a | 2015-02-03 23:58:17 +0800 | [diff] [blame] | 361 | *((u32 *)(regs + APIC_IRR + i * 0x10)) |= pir_val; |
Paolo Bonzini | ad36109 | 2016-09-20 16:15:05 +0200 | [diff] [blame] | 362 | } |
Yang Zhang | a20ed54 | 2013-04-11 19:25:15 +0800 | [diff] [blame] | 363 | } |
| 364 | } |
Wincy Van | 705699a | 2015-02-03 23:58:17 +0800 | [diff] [blame] | 365 | EXPORT_SYMBOL_GPL(__kvm_apic_update_irr); |
| 366 | |
| 367 | void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir) |
| 368 | { |
| 369 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 370 | |
| 371 | __kvm_apic_update_irr(pir, apic->regs); |
Radim Krčmář | c77f3fa | 2015-10-08 20:23:33 +0200 | [diff] [blame] | 372 | |
| 373 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Wincy Van | 705699a | 2015-02-03 23:58:17 +0800 | [diff] [blame] | 374 | } |
Yang Zhang | a20ed54 | 2013-04-11 19:25:15 +0800 | [diff] [blame] | 375 | EXPORT_SYMBOL_GPL(kvm_apic_update_irr); |
| 376 | |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 377 | static inline int apic_search_irr(struct kvm_lapic *apic) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 378 | { |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 379 | return find_highest_vector(apic->regs + APIC_IRR); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | static inline int apic_find_highest_irr(struct kvm_lapic *apic) |
| 383 | { |
| 384 | int result; |
| 385 | |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 386 | /* |
| 387 | * Note that irr_pending is just a hint. It will be always |
| 388 | * true with virtual interrupt delivery enabled. |
| 389 | */ |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 390 | if (!apic->irr_pending) |
| 391 | return -1; |
| 392 | |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 393 | if (apic->vcpu->arch.apicv_active) |
| 394 | kvm_x86_ops->sync_pir_to_irr(apic->vcpu); |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 395 | result = apic_search_irr(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 396 | ASSERT(result == -1 || result >= 16); |
| 397 | |
| 398 | return result; |
| 399 | } |
| 400 | |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 401 | static inline void apic_clear_irr(int vec, struct kvm_lapic *apic) |
| 402 | { |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 403 | struct kvm_vcpu *vcpu; |
| 404 | |
| 405 | vcpu = apic->vcpu; |
| 406 | |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 407 | if (unlikely(vcpu->arch.apicv_active)) { |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 408 | /* try to update RVI */ |
Nadav Amit | f210f75 | 2014-11-16 23:49:07 +0200 | [diff] [blame] | 409 | apic_clear_vector(vec, apic->regs + APIC_IRR); |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 410 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Nadav Amit | f210f75 | 2014-11-16 23:49:07 +0200 | [diff] [blame] | 411 | } else { |
| 412 | apic->irr_pending = false; |
| 413 | apic_clear_vector(vec, apic->regs + APIC_IRR); |
| 414 | if (apic_search_irr(apic) != -1) |
| 415 | apic->irr_pending = true; |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 416 | } |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 417 | } |
| 418 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 419 | static inline void apic_set_isr(int vec, struct kvm_lapic *apic) |
| 420 | { |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 421 | struct kvm_vcpu *vcpu; |
Paolo Bonzini | fc57ac2 | 2014-05-14 17:40:58 +0200 | [diff] [blame] | 422 | |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 423 | if (__apic_test_and_set_vector(vec, apic->regs + APIC_ISR)) |
| 424 | return; |
| 425 | |
| 426 | vcpu = apic->vcpu; |
| 427 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 428 | /* |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 429 | * With APIC virtualization enabled, all caching is disabled |
| 430 | * because the processor can modify ISR under the hood. Instead |
| 431 | * just set SVI. |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 432 | */ |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 433 | if (unlikely(vcpu->arch.apicv_active)) |
Paolo Bonzini | 67c9ddd | 2016-05-10 17:01:23 +0200 | [diff] [blame] | 434 | kvm_x86_ops->hwapic_isr_update(vcpu, vec); |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 435 | else { |
| 436 | ++apic->isr_count; |
| 437 | BUG_ON(apic->isr_count > MAX_APIC_VECTOR); |
| 438 | /* |
| 439 | * ISR (in service register) bit is set when injecting an interrupt. |
| 440 | * The highest vector is injected. Thus the latest bit set matches |
| 441 | * the highest bit in ISR. |
| 442 | */ |
| 443 | apic->highest_isr_cache = vec; |
| 444 | } |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 445 | } |
| 446 | |
Paolo Bonzini | fc57ac2 | 2014-05-14 17:40:58 +0200 | [diff] [blame] | 447 | static inline int apic_find_highest_isr(struct kvm_lapic *apic) |
| 448 | { |
| 449 | int result; |
| 450 | |
| 451 | /* |
| 452 | * Note that isr_count is always 1, and highest_isr_cache |
| 453 | * is always -1, with APIC virtualization enabled. |
| 454 | */ |
| 455 | if (!apic->isr_count) |
| 456 | return -1; |
| 457 | if (likely(apic->highest_isr_cache != -1)) |
| 458 | return apic->highest_isr_cache; |
| 459 | |
| 460 | result = find_highest_vector(apic->regs + APIC_ISR); |
| 461 | ASSERT(result == -1 || result >= 16); |
| 462 | |
| 463 | return result; |
| 464 | } |
| 465 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 466 | static inline void apic_clear_isr(int vec, struct kvm_lapic *apic) |
| 467 | { |
Paolo Bonzini | fc57ac2 | 2014-05-14 17:40:58 +0200 | [diff] [blame] | 468 | struct kvm_vcpu *vcpu; |
| 469 | if (!__apic_test_and_clear_vector(vec, apic->regs + APIC_ISR)) |
| 470 | return; |
| 471 | |
| 472 | vcpu = apic->vcpu; |
| 473 | |
| 474 | /* |
| 475 | * We do get here for APIC virtualization enabled if the guest |
| 476 | * uses the Hyper-V APIC enlightenment. In this case we may need |
| 477 | * to trigger a new interrupt delivery by writing the SVI field; |
| 478 | * on the other hand isr_count and highest_isr_cache are unused |
| 479 | * and must be left alone. |
| 480 | */ |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 481 | if (unlikely(vcpu->arch.apicv_active)) |
Paolo Bonzini | 67c9ddd | 2016-05-10 17:01:23 +0200 | [diff] [blame] | 482 | kvm_x86_ops->hwapic_isr_update(vcpu, |
Paolo Bonzini | fc57ac2 | 2014-05-14 17:40:58 +0200 | [diff] [blame] | 483 | apic_find_highest_isr(apic)); |
| 484 | else { |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 485 | --apic->isr_count; |
Paolo Bonzini | fc57ac2 | 2014-05-14 17:40:58 +0200 | [diff] [blame] | 486 | BUG_ON(apic->isr_count < 0); |
| 487 | apic->highest_isr_cache = -1; |
| 488 | } |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 489 | } |
| 490 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 491 | int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu) |
| 492 | { |
Gleb Natapov | 33e4c68 | 2009-06-11 11:06:51 +0300 | [diff] [blame] | 493 | /* This may race with setting of irr in __apic_accept_irq() and |
| 494 | * value returned may be wrong, but kvm_vcpu_kick() in __apic_accept_irq |
| 495 | * will cause vmexit immediately and the value will be recalculated |
| 496 | * on the next vmentry. |
| 497 | */ |
Paolo Bonzini | f8543d6 | 2016-01-08 13:42:24 +0100 | [diff] [blame] | 498 | return apic_find_highest_irr(vcpu->arch.apic); |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 499 | } |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 500 | |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 501 | static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 502 | int vector, int level, int trig_mode, |
Joerg Roedel | 9e4aabe | 2016-02-29 16:04:43 +0100 | [diff] [blame] | 503 | struct dest_map *dest_map); |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 504 | |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 505 | 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] | 506 | struct dest_map *dest_map) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 507 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 508 | struct kvm_lapic *apic = vcpu->arch.apic; |
Zhang Xiantao | 8be5453 | 2007-12-02 22:35:57 +0800 | [diff] [blame] | 509 | |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 510 | return __apic_accept_irq(apic, irq->delivery_mode, irq->vector, |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 511 | irq->level, irq->trig_mode, dest_map); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 512 | } |
| 513 | |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 514 | static int pv_eoi_put_user(struct kvm_vcpu *vcpu, u8 val) |
| 515 | { |
| 516 | |
| 517 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.pv_eoi.data, &val, |
| 518 | sizeof(val)); |
| 519 | } |
| 520 | |
| 521 | static int pv_eoi_get_user(struct kvm_vcpu *vcpu, u8 *val) |
| 522 | { |
| 523 | |
| 524 | return kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.pv_eoi.data, val, |
| 525 | sizeof(*val)); |
| 526 | } |
| 527 | |
| 528 | static inline bool pv_eoi_enabled(struct kvm_vcpu *vcpu) |
| 529 | { |
| 530 | return vcpu->arch.pv_eoi.msr_val & KVM_MSR_ENABLED; |
| 531 | } |
| 532 | |
| 533 | static bool pv_eoi_get_pending(struct kvm_vcpu *vcpu) |
| 534 | { |
| 535 | u8 val; |
| 536 | if (pv_eoi_get_user(vcpu, &val) < 0) |
| 537 | apic_debug("Can't read EOI MSR value: 0x%llx\n", |
Chen Fan | 9689397 | 2014-01-02 17:14:11 +0800 | [diff] [blame] | 538 | (unsigned long long)vcpu->arch.pv_eoi.msr_val); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 539 | return val & 0x1; |
| 540 | } |
| 541 | |
| 542 | static void pv_eoi_set_pending(struct kvm_vcpu *vcpu) |
| 543 | { |
| 544 | if (pv_eoi_put_user(vcpu, KVM_PV_EOI_ENABLED) < 0) { |
| 545 | apic_debug("Can't set EOI MSR value: 0x%llx\n", |
Chen Fan | 9689397 | 2014-01-02 17:14:11 +0800 | [diff] [blame] | 546 | (unsigned long long)vcpu->arch.pv_eoi.msr_val); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 547 | return; |
| 548 | } |
| 549 | __set_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention); |
| 550 | } |
| 551 | |
| 552 | static void pv_eoi_clr_pending(struct kvm_vcpu *vcpu) |
| 553 | { |
| 554 | if (pv_eoi_put_user(vcpu, KVM_PV_EOI_DISABLED) < 0) { |
| 555 | apic_debug("Can't clear EOI MSR value: 0x%llx\n", |
Chen Fan | 9689397 | 2014-01-02 17:14:11 +0800 | [diff] [blame] | 556 | (unsigned long long)vcpu->arch.pv_eoi.msr_val); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 557 | return; |
| 558 | } |
| 559 | __clear_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention); |
| 560 | } |
| 561 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 562 | static void apic_update_ppr(struct kvm_lapic *apic) |
| 563 | { |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 564 | u32 tpr, isrv, ppr, old_ppr; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 565 | int isr; |
| 566 | |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 567 | old_ppr = kvm_lapic_get_reg(apic, APIC_PROCPRI); |
| 568 | tpr = kvm_lapic_get_reg(apic, APIC_TASKPRI); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 569 | isr = apic_find_highest_isr(apic); |
| 570 | isrv = (isr != -1) ? isr : 0; |
| 571 | |
| 572 | if ((tpr & 0xf0) >= (isrv & 0xf0)) |
| 573 | ppr = tpr & 0xff; |
| 574 | else |
| 575 | ppr = isrv & 0xf0; |
| 576 | |
| 577 | apic_debug("vlapic %p, ppr 0x%x, isr 0x%x, isrv 0x%x", |
| 578 | apic, ppr, isr, isrv); |
| 579 | |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 580 | if (old_ppr != ppr) { |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 581 | kvm_lapic_set_reg(apic, APIC_PROCPRI, ppr); |
Avi Kivity | 83bcacb | 2010-10-25 15:23:55 +0200 | [diff] [blame] | 582 | if (ppr < old_ppr) |
| 583 | kvm_make_request(KVM_REQ_EVENT, apic->vcpu); |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 584 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 585 | } |
| 586 | |
| 587 | static void apic_set_tpr(struct kvm_lapic *apic, u32 tpr) |
| 588 | { |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 589 | kvm_lapic_set_reg(apic, APIC_TASKPRI, tpr); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 590 | apic_update_ppr(apic); |
| 591 | } |
| 592 | |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 593 | static bool kvm_apic_broadcast(struct kvm_lapic *apic, u32 mda) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 594 | { |
Radim Krčmář | b4535b5 | 2016-12-15 18:06:47 +0100 | [diff] [blame^] | 595 | return mda == (apic_x2apic_mode(apic) ? |
| 596 | X2APIC_BROADCAST : APIC_BROADCAST); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 597 | } |
| 598 | |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 599 | 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] | 600 | { |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 601 | if (kvm_apic_broadcast(apic, mda)) |
| 602 | return true; |
| 603 | |
| 604 | if (apic_x2apic_mode(apic)) |
Radim Krčmář | 6e50043 | 2016-12-15 18:06:46 +0100 | [diff] [blame] | 605 | return mda == kvm_x2apic_id(apic); |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 606 | |
Radim Krčmář | b4535b5 | 2016-12-15 18:06:47 +0100 | [diff] [blame^] | 607 | return mda == kvm_xapic_id(apic); |
Nadav Amit | 394457a | 2014-10-03 00:30:52 +0300 | [diff] [blame] | 608 | } |
| 609 | |
Radim Krčmář | 52c233a | 2015-01-29 22:48:48 +0100 | [diff] [blame] | 610 | 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] | 611 | { |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 612 | u32 logical_id; |
| 613 | |
Nadav Amit | 394457a | 2014-10-03 00:30:52 +0300 | [diff] [blame] | 614 | if (kvm_apic_broadcast(apic, mda)) |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 615 | return true; |
Nadav Amit | 394457a | 2014-10-03 00:30:52 +0300 | [diff] [blame] | 616 | |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 617 | logical_id = kvm_lapic_get_reg(apic, APIC_LDR); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 618 | |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 619 | if (apic_x2apic_mode(apic)) |
Radim Krčmář | 8a39536 | 2015-01-29 22:48:51 +0100 | [diff] [blame] | 620 | return ((logical_id >> 16) == (mda >> 16)) |
| 621 | && (logical_id & mda & 0xffff) != 0; |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 622 | |
| 623 | logical_id = GET_APIC_LOGICAL_ID(logical_id); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 624 | |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 625 | switch (kvm_lapic_get_reg(apic, APIC_DFR)) { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 626 | case APIC_DFR_FLAT: |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 627 | return (logical_id & mda) != 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 628 | case APIC_DFR_CLUSTER: |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 629 | return ((logical_id >> 4) == (mda >> 4)) |
| 630 | && (logical_id & mda & 0xf) != 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 631 | default: |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 632 | apic_debug("Bad DFR vcpu %d: %08x\n", |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 633 | apic->vcpu->vcpu_id, kvm_lapic_get_reg(apic, APIC_DFR)); |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 634 | return false; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 635 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 636 | } |
| 637 | |
Radim Krčmář | c519265 | 2016-07-12 22:09:28 +0200 | [diff] [blame] | 638 | /* The KVM local APIC implementation has two quirks: |
| 639 | * |
Radim Krčmář | b4535b5 | 2016-12-15 18:06:47 +0100 | [diff] [blame^] | 640 | * - Real hardware delivers interrupts destined to x2APIC ID > 0xff to LAPICs |
| 641 | * in xAPIC mode if the "destination & 0xff" matches its xAPIC ID. |
| 642 | * KVM doesn't do that aliasing. |
Radim Krčmář | c519265 | 2016-07-12 22:09:28 +0200 | [diff] [blame] | 643 | * |
| 644 | * - in-kernel IOAPIC messages have to be delivered directly to |
| 645 | * x2APIC, because the kernel does not support interrupt remapping. |
| 646 | * In order to support broadcast without interrupt remapping, x2APIC |
| 647 | * rewrites the destination of non-IPI messages from APIC_BROADCAST |
| 648 | * to X2APIC_BROADCAST. |
| 649 | * |
| 650 | * The broadcast quirk can be disabled with KVM_CAP_X2APIC_API. This is |
| 651 | * important when userspace wants to use x2APIC-format MSIs, because |
| 652 | * APIC_BROADCAST (0xff) is a legal route for "cluster 0, CPUs 0-7". |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 653 | */ |
Radim Krčmář | c519265 | 2016-07-12 22:09:28 +0200 | [diff] [blame] | 654 | static u32 kvm_apic_mda(struct kvm_vcpu *vcpu, unsigned int dest_id, |
| 655 | struct kvm_lapic *source, struct kvm_lapic *target) |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 656 | { |
| 657 | bool ipi = source != NULL; |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 658 | |
Radim Krčmář | c519265 | 2016-07-12 22:09:28 +0200 | [diff] [blame] | 659 | if (!vcpu->kvm->arch.x2apic_broadcast_quirk_disabled && |
Radim Krčmář | b4535b5 | 2016-12-15 18:06:47 +0100 | [diff] [blame^] | 660 | !ipi && dest_id == APIC_BROADCAST && apic_x2apic_mode(target)) |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 661 | return X2APIC_BROADCAST; |
| 662 | |
Radim Krčmář | b4535b5 | 2016-12-15 18:06:47 +0100 | [diff] [blame^] | 663 | return dest_id; |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 664 | } |
| 665 | |
Radim Krčmář | 52c233a | 2015-01-29 22:48:48 +0100 | [diff] [blame] | 666 | 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] | 667 | int short_hand, unsigned int dest, int dest_mode) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 668 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 669 | struct kvm_lapic *target = vcpu->arch.apic; |
Radim Krčmář | c519265 | 2016-07-12 22:09:28 +0200 | [diff] [blame] | 670 | u32 mda = kvm_apic_mda(vcpu, dest, source, target); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 671 | |
| 672 | apic_debug("target %p, source %p, dest 0x%x, " |
Gleb Natapov | 343f94f | 2009-03-05 16:34:54 +0200 | [diff] [blame] | 673 | "dest_mode 0x%x, short_hand 0x%x\n", |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 674 | target, source, dest, dest_mode, short_hand); |
| 675 | |
Zachary Amsden | bd37139 | 2010-06-14 11:42:15 -1000 | [diff] [blame] | 676 | ASSERT(target); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 677 | switch (short_hand) { |
| 678 | case APIC_DEST_NOSHORT: |
Radim Krčmář | 3697f30 | 2015-01-29 22:48:50 +0100 | [diff] [blame] | 679 | if (dest_mode == APIC_DEST_PHYSICAL) |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 680 | return kvm_apic_match_physical_addr(target, mda); |
Gleb Natapov | 343f94f | 2009-03-05 16:34:54 +0200 | [diff] [blame] | 681 | else |
Radim Krčmář | 03d2249 | 2015-02-12 19:41:31 +0100 | [diff] [blame] | 682 | return kvm_apic_match_logical_addr(target, mda); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 683 | case APIC_DEST_SELF: |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 684 | return target == source; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 685 | case APIC_DEST_ALLINC: |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 686 | return true; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 687 | case APIC_DEST_ALLBUT: |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 688 | return target != source; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 689 | default: |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 690 | apic_debug("kvm: apic: Bad dest shorthand value %x\n", |
| 691 | short_hand); |
Radim Krčmář | 9368b56 | 2015-01-29 22:48:49 +0100 | [diff] [blame] | 692 | return false; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 693 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 694 | } |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 695 | EXPORT_SYMBOL_GPL(kvm_apic_match_dest); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 696 | |
Feng Wu | 52004014 | 2016-01-25 16:53:33 +0800 | [diff] [blame] | 697 | int kvm_vector_to_index(u32 vector, u32 dest_vcpus, |
| 698 | const unsigned long *bitmap, u32 bitmap_size) |
| 699 | { |
| 700 | u32 mod; |
| 701 | int i, idx = -1; |
| 702 | |
| 703 | mod = vector % dest_vcpus; |
| 704 | |
| 705 | for (i = 0; i <= mod; i++) { |
| 706 | idx = find_next_bit(bitmap, bitmap_size, idx + 1); |
| 707 | BUG_ON(idx == bitmap_size); |
| 708 | } |
| 709 | |
| 710 | return idx; |
| 711 | } |
| 712 | |
Radim Krčmář | 4efd805 | 2016-02-12 15:00:15 +0100 | [diff] [blame] | 713 | static void kvm_apic_disabled_lapic_found(struct kvm *kvm) |
| 714 | { |
| 715 | if (!kvm->arch.disabled_lapic_found) { |
| 716 | kvm->arch.disabled_lapic_found = true; |
| 717 | printk(KERN_INFO |
| 718 | "Disabled LAPIC found during irq injection\n"); |
| 719 | } |
| 720 | } |
| 721 | |
Radim Krčmář | c519265 | 2016-07-12 22:09:28 +0200 | [diff] [blame] | 722 | static bool kvm_apic_is_broadcast_dest(struct kvm *kvm, struct kvm_lapic **src, |
| 723 | struct kvm_lapic_irq *irq, struct kvm_apic_map *map) |
| 724 | { |
| 725 | if (kvm->arch.x2apic_broadcast_quirk_disabled) { |
| 726 | if ((irq->dest_id == APIC_BROADCAST && |
| 727 | map->mode != KVM_APIC_MODE_X2APIC)) |
| 728 | return true; |
| 729 | if (irq->dest_id == X2APIC_BROADCAST) |
| 730 | return true; |
| 731 | } else { |
| 732 | bool x2apic_ipi = src && *src && apic_x2apic_mode(*src); |
| 733 | if (irq->dest_id == (x2apic_ipi ? |
| 734 | X2APIC_BROADCAST : APIC_BROADCAST)) |
| 735 | return true; |
| 736 | } |
| 737 | |
| 738 | return false; |
| 739 | } |
| 740 | |
Radim Krčmář | 64aa47b | 2016-07-12 22:09:18 +0200 | [diff] [blame] | 741 | /* Return true if the interrupt can be handled by using *bitmap as index mask |
| 742 | * for valid destinations in *dst array. |
| 743 | * Return false if kvm_apic_map_get_dest_lapic did nothing useful. |
| 744 | * Note: we may have zero kvm_lapic destinations when we return true, which |
| 745 | * means that the interrupt should be dropped. In this case, *bitmap would be |
| 746 | * zero and *dst undefined. |
| 747 | */ |
| 748 | static inline bool kvm_apic_map_get_dest_lapic(struct kvm *kvm, |
| 749 | struct kvm_lapic **src, struct kvm_lapic_irq *irq, |
| 750 | struct kvm_apic_map *map, struct kvm_lapic ***dst, |
| 751 | unsigned long *bitmap) |
| 752 | { |
| 753 | int i, lowest; |
Radim Krčmář | 64aa47b | 2016-07-12 22:09:18 +0200 | [diff] [blame] | 754 | |
| 755 | if (irq->shorthand == APIC_DEST_SELF && src) { |
| 756 | *dst = src; |
| 757 | *bitmap = 1; |
| 758 | return true; |
| 759 | } else if (irq->shorthand) |
| 760 | return false; |
| 761 | |
Radim Krčmář | c519265 | 2016-07-12 22:09:28 +0200 | [diff] [blame] | 762 | if (!map || kvm_apic_is_broadcast_dest(kvm, src, irq, map)) |
Radim Krčmář | 64aa47b | 2016-07-12 22:09:18 +0200 | [diff] [blame] | 763 | return false; |
| 764 | |
| 765 | if (irq->dest_mode == APIC_DEST_PHYSICAL) { |
Radim Krčmář | 0ca52e7 | 2016-07-12 22:09:20 +0200 | [diff] [blame] | 766 | if (irq->dest_id > map->max_apic_id) { |
Radim Krčmář | 64aa47b | 2016-07-12 22:09:18 +0200 | [diff] [blame] | 767 | *bitmap = 0; |
| 768 | } else { |
| 769 | *dst = &map->phys_map[irq->dest_id]; |
| 770 | *bitmap = 1; |
| 771 | } |
| 772 | return true; |
| 773 | } |
| 774 | |
Radim Krčmář | e45115b | 2016-07-12 22:09:19 +0200 | [diff] [blame] | 775 | *bitmap = 0; |
| 776 | if (!kvm_apic_map_get_logical_dest(map, irq->dest_id, dst, |
| 777 | (u16 *)bitmap)) |
Radim Krčmář | 64aa47b | 2016-07-12 22:09:18 +0200 | [diff] [blame] | 778 | return false; |
| 779 | |
Radim Krčmář | 64aa47b | 2016-07-12 22:09:18 +0200 | [diff] [blame] | 780 | if (!kvm_lowest_prio_delivery(irq)) |
| 781 | return true; |
| 782 | |
| 783 | if (!kvm_vector_hashing_enabled()) { |
| 784 | lowest = -1; |
| 785 | for_each_set_bit(i, bitmap, 16) { |
| 786 | if (!(*dst)[i]) |
| 787 | continue; |
| 788 | if (lowest < 0) |
| 789 | lowest = i; |
| 790 | else if (kvm_apic_compare_prio((*dst)[i]->vcpu, |
| 791 | (*dst)[lowest]->vcpu) < 0) |
| 792 | lowest = i; |
| 793 | } |
| 794 | } else { |
| 795 | if (!*bitmap) |
| 796 | return true; |
| 797 | |
| 798 | lowest = kvm_vector_to_index(irq->vector, hweight16(*bitmap), |
| 799 | bitmap, 16); |
| 800 | |
| 801 | if (!(*dst)[lowest]) { |
| 802 | kvm_apic_disabled_lapic_found(kvm); |
| 803 | *bitmap = 0; |
| 804 | return true; |
| 805 | } |
| 806 | } |
| 807 | |
| 808 | *bitmap = (lowest >= 0) ? 1 << lowest : 0; |
| 809 | |
| 810 | return true; |
| 811 | } |
| 812 | |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 813 | 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] | 814 | struct kvm_lapic_irq *irq, int *r, struct dest_map *dest_map) |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 815 | { |
| 816 | struct kvm_apic_map *map; |
Radim Krčmář | 64aa47b | 2016-07-12 22:09:18 +0200 | [diff] [blame] | 817 | unsigned long bitmap; |
| 818 | struct kvm_lapic **dst = NULL; |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 819 | int i; |
Radim Krčmář | 64aa47b | 2016-07-12 22:09:18 +0200 | [diff] [blame] | 820 | bool ret; |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 821 | |
| 822 | *r = -1; |
| 823 | |
| 824 | if (irq->shorthand == APIC_DEST_SELF) { |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 825 | *r = kvm_apic_set_irq(src->vcpu, irq, dest_map); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 826 | return true; |
| 827 | } |
| 828 | |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 829 | rcu_read_lock(); |
| 830 | map = rcu_dereference(kvm->arch.apic_map); |
| 831 | |
Radim Krčmář | 64aa47b | 2016-07-12 22:09:18 +0200 | [diff] [blame] | 832 | ret = kvm_apic_map_get_dest_lapic(kvm, &src, irq, map, &dst, &bitmap); |
| 833 | if (ret) |
| 834 | for_each_set_bit(i, &bitmap, 16) { |
| 835 | if (!dst[i]) |
| 836 | continue; |
| 837 | if (*r < 0) |
| 838 | *r = 0; |
| 839 | *r += kvm_apic_set_irq(dst[i]->vcpu, irq, dest_map); |
Radim Krčmář | 3548a25 | 2015-02-12 19:41:33 +0100 | [diff] [blame] | 840 | } |
| 841 | |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 842 | rcu_read_unlock(); |
| 843 | return ret; |
| 844 | } |
| 845 | |
Feng Wu | 6228a0d | 2016-01-25 16:53:34 +0800 | [diff] [blame] | 846 | /* |
| 847 | * This routine tries to handler interrupts in posted mode, here is how |
| 848 | * it deals with different cases: |
| 849 | * - For single-destination interrupts, handle it in posted mode |
| 850 | * - Else if vector hashing is enabled and it is a lowest-priority |
| 851 | * interrupt, handle it in posted mode and use the following mechanism |
| 852 | * to find the destinaiton vCPU. |
| 853 | * 1. For lowest-priority interrupts, store all the possible |
| 854 | * destination vCPUs in an array. |
| 855 | * 2. Use "guest vector % max number of destination vCPUs" to find |
| 856 | * the right destination vCPU in the array for the lowest-priority |
| 857 | * interrupt. |
| 858 | * - Otherwise, use remapped mode to inject the interrupt. |
| 859 | */ |
Feng Wu | 8feb4a0 | 2015-09-18 22:29:47 +0800 | [diff] [blame] | 860 | bool kvm_intr_is_single_vcpu_fast(struct kvm *kvm, struct kvm_lapic_irq *irq, |
| 861 | struct kvm_vcpu **dest_vcpu) |
| 862 | { |
| 863 | struct kvm_apic_map *map; |
Radim Krčmář | 64aa47b | 2016-07-12 22:09:18 +0200 | [diff] [blame] | 864 | unsigned long bitmap; |
| 865 | struct kvm_lapic **dst = NULL; |
Feng Wu | 8feb4a0 | 2015-09-18 22:29:47 +0800 | [diff] [blame] | 866 | bool ret = false; |
Feng Wu | 8feb4a0 | 2015-09-18 22:29:47 +0800 | [diff] [blame] | 867 | |
| 868 | if (irq->shorthand) |
| 869 | return false; |
| 870 | |
| 871 | rcu_read_lock(); |
| 872 | map = rcu_dereference(kvm->arch.apic_map); |
| 873 | |
Radim Krčmář | 64aa47b | 2016-07-12 22:09:18 +0200 | [diff] [blame] | 874 | if (kvm_apic_map_get_dest_lapic(kvm, NULL, irq, map, &dst, &bitmap) && |
| 875 | hweight16(bitmap) == 1) { |
| 876 | unsigned long i = find_first_bit(&bitmap, 16); |
Feng Wu | 8feb4a0 | 2015-09-18 22:29:47 +0800 | [diff] [blame] | 877 | |
Radim Krčmář | 64aa47b | 2016-07-12 22:09:18 +0200 | [diff] [blame] | 878 | if (dst[i]) { |
| 879 | *dest_vcpu = dst[i]->vcpu; |
| 880 | ret = true; |
Feng Wu | 8feb4a0 | 2015-09-18 22:29:47 +0800 | [diff] [blame] | 881 | } |
Feng Wu | 8feb4a0 | 2015-09-18 22:29:47 +0800 | [diff] [blame] | 882 | } |
| 883 | |
Feng Wu | 8feb4a0 | 2015-09-18 22:29:47 +0800 | [diff] [blame] | 884 | rcu_read_unlock(); |
| 885 | return ret; |
| 886 | } |
| 887 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 888 | /* |
| 889 | * Add a pending IRQ into lapic. |
| 890 | * Return 1 if successfully added and 0 if discarded. |
| 891 | */ |
| 892 | static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 893 | int vector, int level, int trig_mode, |
Joerg Roedel | 9e4aabe | 2016-02-29 16:04:43 +0100 | [diff] [blame] | 894 | struct dest_map *dest_map) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 895 | { |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 896 | int result = 0; |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 897 | struct kvm_vcpu *vcpu = apic->vcpu; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 898 | |
Paolo Bonzini | a183b63 | 2014-09-11 11:51:02 +0200 | [diff] [blame] | 899 | trace_kvm_apic_accept_irq(vcpu->vcpu_id, delivery_mode, |
| 900 | trig_mode, vector); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 901 | switch (delivery_mode) { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 902 | case APIC_DM_LOWEST: |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 903 | vcpu->arch.apic_arb_prio++; |
| 904 | case APIC_DM_FIXED: |
Paolo Bonzini | bdaffe1 | 2015-07-29 15:03:06 +0200 | [diff] [blame] | 905 | if (unlikely(trig_mode && !level)) |
| 906 | break; |
| 907 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 908 | /* FIXME add logic for vcpu on reset */ |
| 909 | if (unlikely(!apic_enabled(apic))) |
| 910 | break; |
| 911 | |
Jan Kiszka | 11f5cc0 | 2013-07-25 09:58:45 +0200 | [diff] [blame] | 912 | result = 1; |
| 913 | |
Joerg Roedel | 9daa500 | 2016-02-29 16:04:44 +0100 | [diff] [blame] | 914 | if (dest_map) { |
Joerg Roedel | 9e4aabe | 2016-02-29 16:04:43 +0100 | [diff] [blame] | 915 | __set_bit(vcpu->vcpu_id, dest_map->map); |
Joerg Roedel | 9daa500 | 2016-02-29 16:04:44 +0100 | [diff] [blame] | 916 | dest_map->vectors[vcpu->vcpu_id] = vector; |
| 917 | } |
Avi Kivity | a5d36f8 | 2009-12-29 12:42:16 +0200 | [diff] [blame] | 918 | |
Paolo Bonzini | bdaffe1 | 2015-07-29 15:03:06 +0200 | [diff] [blame] | 919 | if (apic_test_vector(vector, apic->regs + APIC_TMR) != !!trig_mode) { |
| 920 | if (trig_mode) |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 921 | kvm_lapic_set_vector(vector, apic->regs + APIC_TMR); |
Paolo Bonzini | bdaffe1 | 2015-07-29 15:03:06 +0200 | [diff] [blame] | 922 | else |
| 923 | apic_clear_vector(vector, apic->regs + APIC_TMR); |
| 924 | } |
| 925 | |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 926 | if (vcpu->arch.apicv_active) |
Yang Zhang | 5a71785 | 2013-04-11 19:25:16 +0800 | [diff] [blame] | 927 | kvm_x86_ops->deliver_posted_interrupt(vcpu, vector); |
Jan Kiszka | 11f5cc0 | 2013-07-25 09:58:45 +0200 | [diff] [blame] | 928 | else { |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 929 | kvm_lapic_set_irr(vector, apic); |
Yang Zhang | 5a71785 | 2013-04-11 19:25:16 +0800 | [diff] [blame] | 930 | |
| 931 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
| 932 | kvm_vcpu_kick(vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 933 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 934 | break; |
| 935 | |
| 936 | case APIC_DM_REMRD: |
Raghavendra K T | 24d2166 | 2013-08-26 14:18:35 +0530 | [diff] [blame] | 937 | result = 1; |
| 938 | vcpu->arch.pv.pv_unhalted = 1; |
| 939 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
| 940 | kvm_vcpu_kick(vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 941 | break; |
| 942 | |
| 943 | case APIC_DM_SMI: |
Paolo Bonzini | 64d6067 | 2015-05-07 11:36:11 +0200 | [diff] [blame] | 944 | result = 1; |
| 945 | kvm_make_request(KVM_REQ_SMI, vcpu); |
| 946 | kvm_vcpu_kick(vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 947 | break; |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 948 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 949 | case APIC_DM_NMI: |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 950 | result = 1; |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 951 | kvm_inject_nmi(vcpu); |
Jan Kiszka | 26df99c | 2008-09-26 09:30:54 +0200 | [diff] [blame] | 952 | kvm_vcpu_kick(vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 953 | break; |
| 954 | |
| 955 | case APIC_DM_INIT: |
Julian Stecklina | a52315e | 2012-01-16 14:02:20 +0100 | [diff] [blame] | 956 | if (!trig_mode || level) { |
Gleb Natapov | 6da7e3f | 2009-03-05 16:34:44 +0200 | [diff] [blame] | 957 | result = 1; |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 958 | /* assumes that there are only KVM_APIC_INIT/SIPI */ |
| 959 | apic->pending_events = (1UL << KVM_APIC_INIT); |
| 960 | /* make sure pending_events is visible before sending |
| 961 | * the request */ |
| 962 | smp_wmb(); |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 963 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 964 | kvm_vcpu_kick(vcpu); |
| 965 | } else { |
Jan Kiszka | 1b10bf3 | 2008-09-30 10:41:06 +0200 | [diff] [blame] | 966 | apic_debug("Ignoring de-assert INIT to vcpu %d\n", |
| 967 | vcpu->vcpu_id); |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 968 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 969 | break; |
| 970 | |
| 971 | case APIC_DM_STARTUP: |
Jan Kiszka | 1b10bf3 | 2008-09-30 10:41:06 +0200 | [diff] [blame] | 972 | apic_debug("SIPI to vcpu %d vector 0x%02x\n", |
| 973 | vcpu->vcpu_id, vector); |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 974 | result = 1; |
| 975 | apic->sipi_vector = vector; |
| 976 | /* make sure sipi_vector is visible for the receiver */ |
| 977 | smp_wmb(); |
| 978 | set_bit(KVM_APIC_SIPI, &apic->pending_events); |
| 979 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
| 980 | kvm_vcpu_kick(vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 981 | break; |
| 982 | |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 983 | case APIC_DM_EXTINT: |
| 984 | /* |
| 985 | * Should only be called by kvm_apic_local_deliver() with LVT0, |
| 986 | * before NMI watchdog was enabled. Already handled by |
| 987 | * kvm_apic_accept_pic_intr(). |
| 988 | */ |
| 989 | break; |
| 990 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 991 | default: |
| 992 | printk(KERN_ERR "TODO: unsupported delivery mode %x\n", |
| 993 | delivery_mode); |
| 994 | break; |
| 995 | } |
| 996 | return result; |
| 997 | } |
| 998 | |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 999 | 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] | 1000 | { |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 1001 | return vcpu1->arch.apic_arb_prio - vcpu2->arch.apic_arb_prio; |
Zhang Xiantao | 8be5453 | 2007-12-02 22:35:57 +0800 | [diff] [blame] | 1002 | } |
| 1003 | |
Paolo Bonzini | 3bb345f | 2015-07-29 10:43:18 +0200 | [diff] [blame] | 1004 | static bool kvm_ioapic_handles_vector(struct kvm_lapic *apic, int vector) |
| 1005 | { |
Andrey Smetanin | 6308630 | 2015-11-10 15:36:32 +0300 | [diff] [blame] | 1006 | return test_bit(vector, apic->vcpu->arch.ioapic_handled_vectors); |
Paolo Bonzini | 3bb345f | 2015-07-29 10:43:18 +0200 | [diff] [blame] | 1007 | } |
| 1008 | |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 1009 | static void kvm_ioapic_send_eoi(struct kvm_lapic *apic, int vector) |
| 1010 | { |
Steve Rutherford | 7543a63 | 2015-07-29 23:21:41 -0700 | [diff] [blame] | 1011 | int trigger_mode; |
Paolo Bonzini | 3bb345f | 2015-07-29 10:43:18 +0200 | [diff] [blame] | 1012 | |
Steve Rutherford | 7543a63 | 2015-07-29 23:21:41 -0700 | [diff] [blame] | 1013 | /* Eoi the ioapic only if the ioapic doesn't own the vector. */ |
| 1014 | if (!kvm_ioapic_handles_vector(apic, vector)) |
| 1015 | return; |
| 1016 | |
| 1017 | /* Request a KVM exit to inform the userspace IOAPIC. */ |
| 1018 | if (irqchip_split(apic->vcpu->kvm)) { |
| 1019 | apic->vcpu->arch.pending_ioapic_eoi = vector; |
| 1020 | kvm_make_request(KVM_REQ_IOAPIC_EOI_EXIT, apic->vcpu); |
| 1021 | return; |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 1022 | } |
Steve Rutherford | 7543a63 | 2015-07-29 23:21:41 -0700 | [diff] [blame] | 1023 | |
| 1024 | if (apic_test_vector(vector, apic->regs + APIC_TMR)) |
| 1025 | trigger_mode = IOAPIC_LEVEL_TRIG; |
| 1026 | else |
| 1027 | trigger_mode = IOAPIC_EDGE_TRIG; |
| 1028 | |
| 1029 | kvm_ioapic_update_eoi(apic->vcpu, vector, trigger_mode); |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 1030 | } |
| 1031 | |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 1032 | static int apic_set_eoi(struct kvm_lapic *apic) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1033 | { |
| 1034 | int vector = apic_find_highest_isr(apic); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 1035 | |
| 1036 | trace_kvm_eoi(apic, vector); |
| 1037 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1038 | /* |
| 1039 | * Not every write EOI will has corresponding ISR, |
| 1040 | * one example is when Kernel check timer on setup_IO_APIC |
| 1041 | */ |
| 1042 | if (vector == -1) |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 1043 | return vector; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1044 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 1045 | apic_clear_isr(vector, apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1046 | apic_update_ppr(apic); |
| 1047 | |
Andrey Smetanin | 5c919412 | 2015-11-10 15:36:34 +0300 | [diff] [blame] | 1048 | if (test_bit(vector, vcpu_to_synic(apic->vcpu)->vec_bitmap)) |
| 1049 | kvm_hv_synic_send_eoi(apic->vcpu, vector); |
| 1050 | |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 1051 | kvm_ioapic_send_eoi(apic, vector); |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 1052 | kvm_make_request(KVM_REQ_EVENT, apic->vcpu); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 1053 | return vector; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1054 | } |
| 1055 | |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 1056 | /* |
| 1057 | * this interface assumes a trap-like exit, which has already finished |
| 1058 | * desired side effect including vISR and vPPR update. |
| 1059 | */ |
| 1060 | void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector) |
| 1061 | { |
| 1062 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1063 | |
| 1064 | trace_kvm_eoi(apic, vector); |
| 1065 | |
| 1066 | kvm_ioapic_send_eoi(apic, vector); |
| 1067 | kvm_make_request(KVM_REQ_EVENT, apic->vcpu); |
| 1068 | } |
| 1069 | EXPORT_SYMBOL_GPL(kvm_apic_set_eoi_accelerated); |
| 1070 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1071 | static void apic_send_ipi(struct kvm_lapic *apic) |
| 1072 | { |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 1073 | u32 icr_low = kvm_lapic_get_reg(apic, APIC_ICR); |
| 1074 | u32 icr_high = kvm_lapic_get_reg(apic, APIC_ICR2); |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 1075 | struct kvm_lapic_irq irq; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1076 | |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 1077 | irq.vector = icr_low & APIC_VECTOR_MASK; |
| 1078 | irq.delivery_mode = icr_low & APIC_MODE_MASK; |
| 1079 | irq.dest_mode = icr_low & APIC_DEST_MASK; |
Paolo Bonzini | b7cb223 | 2015-04-21 14:57:05 +0200 | [diff] [blame] | 1080 | irq.level = (icr_low & APIC_INT_ASSERT) != 0; |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 1081 | irq.trig_mode = icr_low & APIC_INT_LEVELTRIG; |
| 1082 | irq.shorthand = icr_low & APIC_SHORT_MASK; |
James Sullivan | 93bbf0b | 2015-03-18 19:26:03 -0600 | [diff] [blame] | 1083 | irq.msi_redir_hint = false; |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1084 | if (apic_x2apic_mode(apic)) |
| 1085 | irq.dest_id = icr_high; |
| 1086 | else |
| 1087 | irq.dest_id = GET_APIC_DEST_FIELD(icr_high); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1088 | |
Gleb Natapov | 1000ff8 | 2009-07-07 16:00:57 +0300 | [diff] [blame] | 1089 | trace_kvm_apic_ipi(icr_low, irq.dest_id); |
| 1090 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1091 | apic_debug("icr_high 0x%x, icr_low 0x%x, " |
| 1092 | "short_hand 0x%x, dest 0x%x, trig_mode 0x%x, level 0x%x, " |
James Sullivan | 93bbf0b | 2015-03-18 19:26:03 -0600 | [diff] [blame] | 1093 | "dest_mode 0x%x, delivery_mode 0x%x, vector 0x%x, " |
| 1094 | "msi_redir_hint 0x%x\n", |
Glauber Costa | 9b5843dd | 2009-04-29 17:29:09 -0400 | [diff] [blame] | 1095 | icr_high, icr_low, irq.shorthand, irq.dest_id, |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 1096 | irq.trig_mode, irq.level, irq.dest_mode, irq.delivery_mode, |
James Sullivan | 93bbf0b | 2015-03-18 19:26:03 -0600 | [diff] [blame] | 1097 | irq.vector, irq.msi_redir_hint); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1098 | |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 1099 | kvm_irq_delivery_to_apic(apic->vcpu->kvm, apic, &irq, NULL); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1100 | } |
| 1101 | |
| 1102 | static u32 apic_get_tmcct(struct kvm_lapic *apic) |
| 1103 | { |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1104 | ktime_t remaining, now; |
Marcelo Tosatti | b682b81 | 2009-02-10 20:41:41 -0200 | [diff] [blame] | 1105 | s64 ns; |
Kevin Pedretti | 9da8f4e | 2007-10-21 08:55:50 +0200 | [diff] [blame] | 1106 | u32 tmcct; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1107 | |
| 1108 | ASSERT(apic != NULL); |
| 1109 | |
Kevin Pedretti | 9da8f4e | 2007-10-21 08:55:50 +0200 | [diff] [blame] | 1110 | /* if initial count is 0, current count should also be 0 */ |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 1111 | if (kvm_lapic_get_reg(apic, APIC_TMICT) == 0 || |
Andy Honig | b963a22 | 2013-11-19 14:12:18 -0800 | [diff] [blame] | 1112 | apic->lapic_timer.period == 0) |
Kevin Pedretti | 9da8f4e | 2007-10-21 08:55:50 +0200 | [diff] [blame] | 1113 | return 0; |
| 1114 | |
Paolo Bonzini | 5587859 | 2016-10-25 15:23:49 +0200 | [diff] [blame] | 1115 | now = ktime_get(); |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1116 | remaining = ktime_sub(apic->lapic_timer.target_expiration, now); |
Marcelo Tosatti | b682b81 | 2009-02-10 20:41:41 -0200 | [diff] [blame] | 1117 | if (ktime_to_ns(remaining) < 0) |
Thomas Gleixner | 8b0e195 | 2016-12-25 12:30:41 +0100 | [diff] [blame] | 1118 | remaining = 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1119 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1120 | ns = mod_64(ktime_to_ns(remaining), apic->lapic_timer.period); |
| 1121 | tmcct = div64_u64(ns, |
| 1122 | (APIC_BUS_CYCLE_NS * apic->divide_count)); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1123 | |
| 1124 | return tmcct; |
| 1125 | } |
| 1126 | |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 1127 | static void __report_tpr_access(struct kvm_lapic *apic, bool write) |
| 1128 | { |
| 1129 | struct kvm_vcpu *vcpu = apic->vcpu; |
| 1130 | struct kvm_run *run = vcpu->run; |
| 1131 | |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 1132 | kvm_make_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu); |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 1133 | run->tpr_access.rip = kvm_rip_read(vcpu); |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 1134 | run->tpr_access.is_write = write; |
| 1135 | } |
| 1136 | |
| 1137 | static inline void report_tpr_access(struct kvm_lapic *apic, bool write) |
| 1138 | { |
| 1139 | if (apic->vcpu->arch.tpr_access_reporting) |
| 1140 | __report_tpr_access(apic, write); |
| 1141 | } |
| 1142 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1143 | static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset) |
| 1144 | { |
| 1145 | u32 val = 0; |
| 1146 | |
| 1147 | if (offset >= LAPIC_MMIO_LENGTH) |
| 1148 | return 0; |
| 1149 | |
| 1150 | switch (offset) { |
| 1151 | case APIC_ARBPRI: |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 1152 | apic_debug("Access APIC ARBPRI register which is for P6\n"); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1153 | break; |
| 1154 | |
| 1155 | case APIC_TMCCT: /* Timer CCR */ |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1156 | if (apic_lvtt_tscdeadline(apic)) |
| 1157 | return 0; |
| 1158 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1159 | val = apic_get_tmcct(apic); |
| 1160 | break; |
Avi Kivity | 4a4541a | 2012-07-22 17:41:00 +0300 | [diff] [blame] | 1161 | case APIC_PROCPRI: |
| 1162 | apic_update_ppr(apic); |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 1163 | val = kvm_lapic_get_reg(apic, offset); |
Avi Kivity | 4a4541a | 2012-07-22 17:41:00 +0300 | [diff] [blame] | 1164 | break; |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 1165 | case APIC_TASKPRI: |
| 1166 | report_tpr_access(apic, false); |
| 1167 | /* fall thru */ |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1168 | default: |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 1169 | val = kvm_lapic_get_reg(apic, offset); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1170 | break; |
| 1171 | } |
| 1172 | |
| 1173 | return val; |
| 1174 | } |
| 1175 | |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 1176 | static inline struct kvm_lapic *to_lapic(struct kvm_io_device *dev) |
| 1177 | { |
| 1178 | return container_of(dev, struct kvm_lapic, dev); |
| 1179 | } |
| 1180 | |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1181 | int kvm_lapic_reg_read(struct kvm_lapic *apic, u32 offset, int len, |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1182 | void *data) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 1183 | { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1184 | unsigned char alignment = offset & 0xf; |
| 1185 | u32 result; |
Guo Chao | d5b0b5b | 2012-06-28 15:22:57 +0800 | [diff] [blame] | 1186 | /* this bitmask has a bit cleared for each reserved register */ |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1187 | static const u64 rmask = 0x43ff01ffffffe70cULL; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1188 | |
| 1189 | if ((alignment + len) > 4) { |
Gleb Natapov | 4088bb3 | 2009-07-08 11:26:54 +0300 | [diff] [blame] | 1190 | apic_debug("KVM_APIC_READ: alignment error %x %d\n", |
| 1191 | offset, len); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1192 | return 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1193 | } |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1194 | |
| 1195 | if (offset > 0x3f0 || !(rmask & (1ULL << (offset >> 4)))) { |
Gleb Natapov | 4088bb3 | 2009-07-08 11:26:54 +0300 | [diff] [blame] | 1196 | apic_debug("KVM_APIC_READ: read reserved register %x\n", |
| 1197 | offset); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1198 | return 1; |
| 1199 | } |
| 1200 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1201 | result = __apic_read(apic, offset & ~0xf); |
| 1202 | |
Marcelo Tosatti | 229456f | 2009-06-17 09:22:14 -0300 | [diff] [blame] | 1203 | trace_kvm_apic_read(offset, result); |
| 1204 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1205 | switch (len) { |
| 1206 | case 1: |
| 1207 | case 2: |
| 1208 | case 4: |
| 1209 | memcpy(data, (char *)&result + alignment, len); |
| 1210 | break; |
| 1211 | default: |
| 1212 | printk(KERN_ERR "Local APIC read with len = %x, " |
| 1213 | "should be 1,2, or 4 instead\n", len); |
| 1214 | break; |
| 1215 | } |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 1216 | return 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1217 | } |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1218 | EXPORT_SYMBOL_GPL(kvm_lapic_reg_read); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1219 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1220 | static int apic_mmio_in_range(struct kvm_lapic *apic, gpa_t addr) |
| 1221 | { |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1222 | return kvm_apic_hw_enabled(apic) && |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1223 | addr >= apic->base_address && |
| 1224 | addr < apic->base_address + LAPIC_MMIO_LENGTH; |
| 1225 | } |
| 1226 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 1227 | 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] | 1228 | gpa_t address, int len, void *data) |
| 1229 | { |
| 1230 | struct kvm_lapic *apic = to_lapic(this); |
| 1231 | u32 offset = address - apic->base_address; |
| 1232 | |
| 1233 | if (!apic_mmio_in_range(apic, address)) |
| 1234 | return -EOPNOTSUPP; |
| 1235 | |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1236 | kvm_lapic_reg_read(apic, offset, len, data); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1237 | |
| 1238 | return 0; |
| 1239 | } |
| 1240 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1241 | static void update_divide_count(struct kvm_lapic *apic) |
| 1242 | { |
| 1243 | u32 tmp1, tmp2, tdcr; |
| 1244 | |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 1245 | tdcr = kvm_lapic_get_reg(apic, APIC_TDCR); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1246 | tmp1 = tdcr & 0xf; |
| 1247 | tmp2 = ((tmp1 & 0x3) | ((tmp1 & 0x8) >> 1)) + 1; |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1248 | apic->divide_count = 0x1 << (tmp2 & 0x7); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1249 | |
| 1250 | apic_debug("timer divide count is 0x%x\n", |
Glauber Costa | 9b5843dd | 2009-04-29 17:29:09 -0400 | [diff] [blame] | 1251 | apic->divide_count); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1252 | } |
| 1253 | |
Radim Krčmář | b6ac069 | 2015-06-05 20:57:41 +0200 | [diff] [blame] | 1254 | static void apic_update_lvtt(struct kvm_lapic *apic) |
| 1255 | { |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 1256 | u32 timer_mode = kvm_lapic_get_reg(apic, APIC_LVTT) & |
Radim Krčmář | b6ac069 | 2015-06-05 20:57:41 +0200 | [diff] [blame] | 1257 | apic->lapic_timer.timer_mode_mask; |
| 1258 | |
| 1259 | if (apic->lapic_timer.timer_mode != timer_mode) { |
| 1260 | apic->lapic_timer.timer_mode = timer_mode; |
| 1261 | hrtimer_cancel(&apic->lapic_timer.timer); |
| 1262 | } |
| 1263 | } |
| 1264 | |
Radim Krčmář | 5d87db7 | 2014-10-10 19:15:08 +0200 | [diff] [blame] | 1265 | static void apic_timer_expired(struct kvm_lapic *apic) |
| 1266 | { |
| 1267 | struct kvm_vcpu *vcpu = apic->vcpu; |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 1268 | struct swait_queue_head *q = &vcpu->wq; |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1269 | struct kvm_timer *ktimer = &apic->lapic_timer; |
Radim Krčmář | 5d87db7 | 2014-10-10 19:15:08 +0200 | [diff] [blame] | 1270 | |
Radim Krčmář | 5d87db7 | 2014-10-10 19:15:08 +0200 | [diff] [blame] | 1271 | if (atomic_read(&apic->lapic_timer.pending)) |
| 1272 | return; |
| 1273 | |
| 1274 | atomic_inc(&apic->lapic_timer.pending); |
Nicholas Krause | bab5bb3 | 2015-01-01 22:05:18 -0500 | [diff] [blame] | 1275 | kvm_set_pending_timer(vcpu); |
Radim Krčmář | 5d87db7 | 2014-10-10 19:15:08 +0200 | [diff] [blame] | 1276 | |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 1277 | if (swait_active(q)) |
| 1278 | swake_up(q); |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1279 | |
| 1280 | if (apic_lvtt_tscdeadline(apic)) |
| 1281 | ktimer->expired_tscdeadline = ktimer->tscdeadline; |
| 1282 | } |
| 1283 | |
| 1284 | /* |
| 1285 | * On APICv, this test will cause a busy wait |
| 1286 | * during a higher-priority task. |
| 1287 | */ |
| 1288 | |
| 1289 | static bool lapic_timer_int_injected(struct kvm_vcpu *vcpu) |
| 1290 | { |
| 1291 | struct kvm_lapic *apic = vcpu->arch.apic; |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 1292 | u32 reg = kvm_lapic_get_reg(apic, APIC_LVTT); |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1293 | |
| 1294 | if (kvm_apic_hw_enabled(apic)) { |
| 1295 | int vec = reg & APIC_VECTOR_MASK; |
Marcelo Tosatti | f933986 | 2015-02-02 15:26:08 -0200 | [diff] [blame] | 1296 | void *bitmap = apic->regs + APIC_ISR; |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1297 | |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 1298 | if (vcpu->arch.apicv_active) |
Marcelo Tosatti | f933986 | 2015-02-02 15:26:08 -0200 | [diff] [blame] | 1299 | bitmap = apic->regs + APIC_IRR; |
| 1300 | |
| 1301 | if (apic_test_vector(vec, bitmap)) |
| 1302 | return true; |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1303 | } |
| 1304 | return false; |
| 1305 | } |
| 1306 | |
| 1307 | void wait_lapic_expire(struct kvm_vcpu *vcpu) |
| 1308 | { |
| 1309 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1310 | u64 guest_tsc, tsc_deadline; |
| 1311 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 1312 | if (!lapic_in_kernel(vcpu)) |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1313 | return; |
| 1314 | |
| 1315 | if (apic->lapic_timer.expired_tscdeadline == 0) |
| 1316 | return; |
| 1317 | |
| 1318 | if (!lapic_timer_int_injected(vcpu)) |
| 1319 | return; |
| 1320 | |
| 1321 | tsc_deadline = apic->lapic_timer.expired_tscdeadline; |
| 1322 | apic->lapic_timer.expired_tscdeadline = 0; |
Haozhong Zhang | 4ba7653 | 2015-10-20 15:39:07 +0800 | [diff] [blame] | 1323 | guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc()); |
Marcelo Tosatti | 6c19b75 | 2014-12-16 09:08:16 -0500 | [diff] [blame] | 1324 | trace_kvm_wait_lapic_expire(vcpu->vcpu_id, guest_tsc - tsc_deadline); |
Marcelo Tosatti | d0659d9 | 2014-12-16 09:08:15 -0500 | [diff] [blame] | 1325 | |
| 1326 | /* __delay is delay_tsc whenever the hardware has TSC, thus always. */ |
| 1327 | if (guest_tsc < tsc_deadline) |
Marcelo Tosatti | b606f18 | 2016-06-20 22:33:48 -0300 | [diff] [blame] | 1328 | __delay(min(tsc_deadline - guest_tsc, |
| 1329 | nsec_to_cycles(vcpu, lapic_timer_advance_ns))); |
Radim Krčmář | 5d87db7 | 2014-10-10 19:15:08 +0200 | [diff] [blame] | 1330 | } |
| 1331 | |
Yunhong Jiang | 53f9eed | 2016-06-13 14:20:00 -0700 | [diff] [blame] | 1332 | static void start_sw_tscdeadline(struct kvm_lapic *apic) |
| 1333 | { |
| 1334 | u64 guest_tsc, tscdeadline = apic->lapic_timer.tscdeadline; |
| 1335 | u64 ns = 0; |
| 1336 | ktime_t expire; |
| 1337 | struct kvm_vcpu *vcpu = apic->vcpu; |
| 1338 | unsigned long this_tsc_khz = vcpu->arch.virtual_tsc_khz; |
| 1339 | unsigned long flags; |
| 1340 | ktime_t now; |
| 1341 | |
| 1342 | if (unlikely(!tscdeadline || !this_tsc_khz)) |
| 1343 | return; |
| 1344 | |
| 1345 | local_irq_save(flags); |
| 1346 | |
Paolo Bonzini | 5587859 | 2016-10-25 15:23:49 +0200 | [diff] [blame] | 1347 | now = ktime_get(); |
Yunhong Jiang | 53f9eed | 2016-06-13 14:20:00 -0700 | [diff] [blame] | 1348 | guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc()); |
| 1349 | if (likely(tscdeadline > guest_tsc)) { |
| 1350 | ns = (tscdeadline - guest_tsc) * 1000000ULL; |
| 1351 | do_div(ns, this_tsc_khz); |
| 1352 | expire = ktime_add_ns(now, ns); |
| 1353 | expire = ktime_sub_ns(expire, lapic_timer_advance_ns); |
| 1354 | hrtimer_start(&apic->lapic_timer.timer, |
| 1355 | expire, HRTIMER_MODE_ABS_PINNED); |
| 1356 | } else |
| 1357 | apic_timer_expired(apic); |
| 1358 | |
| 1359 | local_irq_restore(flags); |
| 1360 | } |
| 1361 | |
Wanpeng Li | 7d7f7da | 2016-10-24 18:23:09 +0800 | [diff] [blame] | 1362 | static void start_sw_period(struct kvm_lapic *apic) |
| 1363 | { |
Wanpeng Li | 7d7f7da | 2016-10-24 18:23:09 +0800 | [diff] [blame] | 1364 | if (!apic->lapic_timer.period) |
| 1365 | return; |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1366 | |
| 1367 | if (apic_lvtt_oneshot(apic) && |
Paolo Bonzini | 5587859 | 2016-10-25 15:23:49 +0200 | [diff] [blame] | 1368 | ktime_after(ktime_get(), |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1369 | apic->lapic_timer.target_expiration)) { |
| 1370 | apic_timer_expired(apic); |
| 1371 | return; |
| 1372 | } |
| 1373 | |
| 1374 | hrtimer_start(&apic->lapic_timer.timer, |
| 1375 | apic->lapic_timer.target_expiration, |
| 1376 | HRTIMER_MODE_ABS_PINNED); |
| 1377 | } |
| 1378 | |
| 1379 | static bool set_target_expiration(struct kvm_lapic *apic) |
| 1380 | { |
| 1381 | ktime_t now; |
| 1382 | u64 tscl = rdtsc(); |
| 1383 | |
Paolo Bonzini | 5587859 | 2016-10-25 15:23:49 +0200 | [diff] [blame] | 1384 | now = ktime_get(); |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1385 | apic->lapic_timer.period = (u64)kvm_lapic_get_reg(apic, APIC_TMICT) |
| 1386 | * APIC_BUS_CYCLE_NS * apic->divide_count; |
| 1387 | |
| 1388 | if (!apic->lapic_timer.period) |
| 1389 | return false; |
| 1390 | |
Wanpeng Li | 7d7f7da | 2016-10-24 18:23:09 +0800 | [diff] [blame] | 1391 | /* |
| 1392 | * Do not allow the guest to program periodic timers with small |
| 1393 | * interval, since the hrtimers are not throttled by the host |
| 1394 | * scheduler. |
| 1395 | */ |
| 1396 | if (apic_lvtt_period(apic)) { |
| 1397 | s64 min_period = min_timer_period_us * 1000LL; |
| 1398 | |
| 1399 | if (apic->lapic_timer.period < min_period) { |
| 1400 | pr_info_ratelimited( |
| 1401 | "kvm: vcpu %i: requested %lld ns " |
| 1402 | "lapic timer period limited to %lld ns\n", |
| 1403 | apic->vcpu->vcpu_id, |
| 1404 | apic->lapic_timer.period, min_period); |
| 1405 | apic->lapic_timer.period = min_period; |
| 1406 | } |
| 1407 | } |
| 1408 | |
Wanpeng Li | 7d7f7da | 2016-10-24 18:23:09 +0800 | [diff] [blame] | 1409 | apic_debug("%s: bus cycle is %" PRId64 "ns, now 0x%016" |
| 1410 | PRIx64 ", " |
| 1411 | "timer initial count 0x%x, period %lldns, " |
| 1412 | "expire @ 0x%016" PRIx64 ".\n", __func__, |
| 1413 | APIC_BUS_CYCLE_NS, ktime_to_ns(now), |
| 1414 | kvm_lapic_get_reg(apic, APIC_TMICT), |
| 1415 | apic->lapic_timer.period, |
| 1416 | ktime_to_ns(ktime_add_ns(now, |
| 1417 | apic->lapic_timer.period))); |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1418 | |
| 1419 | apic->lapic_timer.tscdeadline = kvm_read_l1_tsc(apic->vcpu, tscl) + |
| 1420 | nsec_to_cycles(apic->vcpu, apic->lapic_timer.period); |
| 1421 | apic->lapic_timer.target_expiration = ktime_add_ns(now, apic->lapic_timer.period); |
| 1422 | |
| 1423 | return true; |
| 1424 | } |
| 1425 | |
| 1426 | static void advance_periodic_target_expiration(struct kvm_lapic *apic) |
| 1427 | { |
| 1428 | apic->lapic_timer.tscdeadline += |
| 1429 | nsec_to_cycles(apic->vcpu, apic->lapic_timer.period); |
| 1430 | apic->lapic_timer.target_expiration = |
| 1431 | ktime_add_ns(apic->lapic_timer.target_expiration, |
| 1432 | apic->lapic_timer.period); |
Wanpeng Li | 7d7f7da | 2016-10-24 18:23:09 +0800 | [diff] [blame] | 1433 | } |
| 1434 | |
Yunhong Jiang | ce7a058 | 2016-06-13 14:20:01 -0700 | [diff] [blame] | 1435 | bool kvm_lapic_hv_timer_in_use(struct kvm_vcpu *vcpu) |
| 1436 | { |
Wanpeng Li | 9100530 | 2016-08-03 12:04:12 +0800 | [diff] [blame] | 1437 | if (!lapic_in_kernel(vcpu)) |
| 1438 | return false; |
| 1439 | |
Yunhong Jiang | ce7a058 | 2016-06-13 14:20:01 -0700 | [diff] [blame] | 1440 | return vcpu->arch.apic->lapic_timer.hv_timer_in_use; |
| 1441 | } |
| 1442 | EXPORT_SYMBOL_GPL(kvm_lapic_hv_timer_in_use); |
| 1443 | |
Wanpeng Li | 7e810a3 | 2016-10-24 18:23:12 +0800 | [diff] [blame] | 1444 | static void cancel_hv_timer(struct kvm_lapic *apic) |
Wanpeng Li | bd97ad0 | 2016-06-30 08:52:49 +0800 | [diff] [blame] | 1445 | { |
| 1446 | kvm_x86_ops->cancel_hv_timer(apic->vcpu); |
| 1447 | apic->lapic_timer.hv_timer_in_use = false; |
| 1448 | } |
| 1449 | |
Wanpeng Li | 7e810a3 | 2016-10-24 18:23:12 +0800 | [diff] [blame] | 1450 | static bool start_hv_timer(struct kvm_lapic *apic) |
Wanpeng Li | 196f20c | 2016-06-28 14:54:19 +0800 | [diff] [blame] | 1451 | { |
| 1452 | u64 tscdeadline = apic->lapic_timer.tscdeadline; |
| 1453 | |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1454 | if ((atomic_read(&apic->lapic_timer.pending) && |
| 1455 | !apic_lvtt_period(apic)) || |
Wanpeng Li | 196f20c | 2016-06-28 14:54:19 +0800 | [diff] [blame] | 1456 | kvm_x86_ops->set_hv_timer(apic->vcpu, tscdeadline)) { |
| 1457 | if (apic->lapic_timer.hv_timer_in_use) |
Wanpeng Li | 7e810a3 | 2016-10-24 18:23:12 +0800 | [diff] [blame] | 1458 | cancel_hv_timer(apic); |
Wanpeng Li | 196f20c | 2016-06-28 14:54:19 +0800 | [diff] [blame] | 1459 | } else { |
| 1460 | apic->lapic_timer.hv_timer_in_use = true; |
| 1461 | hrtimer_cancel(&apic->lapic_timer.timer); |
| 1462 | |
| 1463 | /* In case the sw timer triggered in the window */ |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1464 | if (atomic_read(&apic->lapic_timer.pending) && |
| 1465 | !apic_lvtt_period(apic)) |
Wanpeng Li | 7e810a3 | 2016-10-24 18:23:12 +0800 | [diff] [blame] | 1466 | cancel_hv_timer(apic); |
Wanpeng Li | 196f20c | 2016-06-28 14:54:19 +0800 | [diff] [blame] | 1467 | } |
| 1468 | trace_kvm_hv_timer_state(apic->vcpu->vcpu_id, |
| 1469 | apic->lapic_timer.hv_timer_in_use); |
| 1470 | return apic->lapic_timer.hv_timer_in_use; |
| 1471 | } |
| 1472 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1473 | void kvm_lapic_expired_hv_timer(struct kvm_vcpu *vcpu) |
| 1474 | { |
| 1475 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1476 | |
| 1477 | WARN_ON(!apic->lapic_timer.hv_timer_in_use); |
| 1478 | WARN_ON(swait_active(&vcpu->wq)); |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1479 | cancel_hv_timer(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1480 | apic_timer_expired(apic); |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1481 | |
| 1482 | if (apic_lvtt_period(apic) && apic->lapic_timer.period) { |
| 1483 | advance_periodic_target_expiration(apic); |
| 1484 | if (!start_hv_timer(apic)) |
| 1485 | start_sw_period(apic); |
| 1486 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1487 | } |
| 1488 | EXPORT_SYMBOL_GPL(kvm_lapic_expired_hv_timer); |
| 1489 | |
Yunhong Jiang | ce7a058 | 2016-06-13 14:20:01 -0700 | [diff] [blame] | 1490 | void kvm_lapic_switch_to_hv_timer(struct kvm_vcpu *vcpu) |
| 1491 | { |
| 1492 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1493 | |
| 1494 | WARN_ON(apic->lapic_timer.hv_timer_in_use); |
| 1495 | |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1496 | start_hv_timer(apic); |
Yunhong Jiang | ce7a058 | 2016-06-13 14:20:01 -0700 | [diff] [blame] | 1497 | } |
| 1498 | EXPORT_SYMBOL_GPL(kvm_lapic_switch_to_hv_timer); |
| 1499 | |
| 1500 | void kvm_lapic_switch_to_sw_timer(struct kvm_vcpu *vcpu) |
| 1501 | { |
| 1502 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1503 | |
| 1504 | /* Possibly the TSC deadline timer is not enabled yet */ |
| 1505 | if (!apic->lapic_timer.hv_timer_in_use) |
| 1506 | return; |
| 1507 | |
Wanpeng Li | 7e810a3 | 2016-10-24 18:23:12 +0800 | [diff] [blame] | 1508 | cancel_hv_timer(apic); |
Yunhong Jiang | ce7a058 | 2016-06-13 14:20:01 -0700 | [diff] [blame] | 1509 | |
| 1510 | if (atomic_read(&apic->lapic_timer.pending)) |
| 1511 | return; |
| 1512 | |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1513 | if (apic_lvtt_period(apic) || apic_lvtt_oneshot(apic)) |
| 1514 | start_sw_period(apic); |
| 1515 | else if (apic_lvtt_tscdeadline(apic)) |
| 1516 | start_sw_tscdeadline(apic); |
Yunhong Jiang | ce7a058 | 2016-06-13 14:20:01 -0700 | [diff] [blame] | 1517 | } |
| 1518 | EXPORT_SYMBOL_GPL(kvm_lapic_switch_to_sw_timer); |
| 1519 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1520 | static void start_apic_timer(struct kvm_lapic *apic) |
| 1521 | { |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1522 | atomic_set(&apic->lapic_timer.pending, 0); |
Avi Kivity | 0b975a3 | 2008-02-24 14:37:50 +0200 | [diff] [blame] | 1523 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1524 | if (apic_lvtt_period(apic) || apic_lvtt_oneshot(apic)) { |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1525 | if (set_target_expiration(apic) && |
| 1526 | !(kvm_x86_ops->set_hv_timer && start_hv_timer(apic))) |
| 1527 | start_sw_period(apic); |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1528 | } else if (apic_lvtt_tscdeadline(apic)) { |
Wanpeng Li | 7e810a3 | 2016-10-24 18:23:12 +0800 | [diff] [blame] | 1529 | if (!(kvm_x86_ops->set_hv_timer && start_hv_timer(apic))) |
Yunhong Jiang | ce7a058 | 2016-06-13 14:20:01 -0700 | [diff] [blame] | 1530 | start_sw_tscdeadline(apic); |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1531 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1532 | } |
| 1533 | |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 1534 | static void apic_manage_nmi_watchdog(struct kvm_lapic *apic, u32 lvt0_val) |
| 1535 | { |
Radim Krčmář | 59fd132 | 2015-06-30 22:19:16 +0200 | [diff] [blame] | 1536 | bool lvt0_in_nmi_mode = apic_lvt_nmi_mode(lvt0_val); |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 1537 | |
Radim Krčmář | 59fd132 | 2015-06-30 22:19:16 +0200 | [diff] [blame] | 1538 | if (apic->lvt0_in_nmi_mode != lvt0_in_nmi_mode) { |
| 1539 | apic->lvt0_in_nmi_mode = lvt0_in_nmi_mode; |
| 1540 | if (lvt0_in_nmi_mode) { |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 1541 | apic_debug("Receive NMI setting on APIC_LVT0 " |
| 1542 | "for cpu %d\n", apic->vcpu->vcpu_id); |
Radim Krčmář | 4272013 | 2015-07-01 15:31:49 +0200 | [diff] [blame] | 1543 | atomic_inc(&apic->vcpu->kvm->arch.vapics_in_nmi_mode); |
Radim Krčmář | 59fd132 | 2015-06-30 22:19:16 +0200 | [diff] [blame] | 1544 | } else |
| 1545 | atomic_dec(&apic->vcpu->kvm->arch.vapics_in_nmi_mode); |
| 1546 | } |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 1547 | } |
| 1548 | |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1549 | int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1550 | { |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1551 | int ret = 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1552 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1553 | trace_kvm_apic_write(reg, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1554 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1555 | switch (reg) { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1556 | case APIC_ID: /* Local APIC ID */ |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1557 | if (!apic_x2apic_mode(apic)) |
Radim Krčmář | a92e254 | 2016-07-12 22:09:22 +0200 | [diff] [blame] | 1558 | kvm_apic_set_xapic_id(apic, val >> 24); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1559 | else |
| 1560 | ret = 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1561 | break; |
| 1562 | |
| 1563 | case APIC_TASKPRI: |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 1564 | report_tpr_access(apic, true); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1565 | apic_set_tpr(apic, val & 0xff); |
| 1566 | break; |
| 1567 | |
| 1568 | case APIC_EOI: |
| 1569 | apic_set_eoi(apic); |
| 1570 | break; |
| 1571 | |
| 1572 | case APIC_LDR: |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1573 | if (!apic_x2apic_mode(apic)) |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 1574 | kvm_apic_set_ldr(apic, val & APIC_LDR_MASK); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1575 | else |
| 1576 | ret = 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1577 | break; |
| 1578 | |
| 1579 | case APIC_DFR: |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 1580 | if (!apic_x2apic_mode(apic)) { |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1581 | kvm_lapic_set_reg(apic, APIC_DFR, val | 0x0FFFFFFF); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 1582 | recalculate_apic_map(apic->vcpu->kvm); |
| 1583 | } else |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1584 | ret = 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1585 | break; |
| 1586 | |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 1587 | case APIC_SPIV: { |
| 1588 | u32 mask = 0x3ff; |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 1589 | if (kvm_lapic_get_reg(apic, APIC_LVR) & APIC_LVR_DIRECTED_EOI) |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 1590 | mask |= APIC_SPIV_DIRECTED_EOI; |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 1591 | apic_set_spiv(apic, val & mask); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1592 | if (!(val & APIC_SPIV_APIC_ENABLED)) { |
| 1593 | int i; |
| 1594 | u32 lvt_val; |
| 1595 | |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1596 | for (i = 0; i < KVM_APIC_LVT_NUM; i++) { |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 1597 | lvt_val = kvm_lapic_get_reg(apic, |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1598 | APIC_LVTT + 0x10 * i); |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1599 | kvm_lapic_set_reg(apic, APIC_LVTT + 0x10 * i, |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1600 | lvt_val | APIC_LVT_MASKED); |
| 1601 | } |
Radim Krčmář | b6ac069 | 2015-06-05 20:57:41 +0200 | [diff] [blame] | 1602 | apic_update_lvtt(apic); |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1603 | atomic_set(&apic->lapic_timer.pending, 0); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1604 | |
| 1605 | } |
| 1606 | break; |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 1607 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1608 | case APIC_ICR: |
| 1609 | /* No delay here, so we always clear the pending bit */ |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1610 | kvm_lapic_set_reg(apic, APIC_ICR, val & ~(1 << 12)); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1611 | apic_send_ipi(apic); |
| 1612 | break; |
| 1613 | |
| 1614 | case APIC_ICR2: |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1615 | if (!apic_x2apic_mode(apic)) |
| 1616 | val &= 0xff000000; |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1617 | kvm_lapic_set_reg(apic, APIC_ICR2, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1618 | break; |
| 1619 | |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 1620 | case APIC_LVT0: |
Jan Kiszka | cc6e462 | 2008-10-20 10:20:03 +0200 | [diff] [blame] | 1621 | apic_manage_nmi_watchdog(apic, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1622 | case APIC_LVTTHMR: |
| 1623 | case APIC_LVTPC: |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1624 | case APIC_LVT1: |
| 1625 | case APIC_LVTERR: |
| 1626 | /* TODO: Check vector */ |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1627 | if (!kvm_apic_sw_enabled(apic)) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1628 | val |= APIC_LVT_MASKED; |
| 1629 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1630 | val &= apic_lvt_mask[(reg - APIC_LVTT) >> 4]; |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1631 | kvm_lapic_set_reg(apic, reg, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1632 | |
| 1633 | break; |
| 1634 | |
Radim Krčmář | b6ac069 | 2015-06-05 20:57:41 +0200 | [diff] [blame] | 1635 | case APIC_LVTT: |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1636 | if (!kvm_apic_sw_enabled(apic)) |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1637 | val |= APIC_LVT_MASKED; |
| 1638 | val &= (apic_lvt_mask[0] | apic->lapic_timer.timer_mode_mask); |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1639 | kvm_lapic_set_reg(apic, APIC_LVTT, val); |
Radim Krčmář | b6ac069 | 2015-06-05 20:57:41 +0200 | [diff] [blame] | 1640 | apic_update_lvtt(apic); |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1641 | break; |
| 1642 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1643 | case APIC_TMICT: |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1644 | if (apic_lvtt_tscdeadline(apic)) |
| 1645 | break; |
| 1646 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1647 | hrtimer_cancel(&apic->lapic_timer.timer); |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1648 | kvm_lapic_set_reg(apic, APIC_TMICT, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1649 | start_apic_timer(apic); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1650 | break; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1651 | |
| 1652 | case APIC_TDCR: |
| 1653 | if (val & 4) |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 1654 | apic_debug("KVM_WRITE:TDCR %x\n", val); |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1655 | kvm_lapic_set_reg(apic, APIC_TDCR, val); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1656 | update_divide_count(apic); |
| 1657 | break; |
| 1658 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1659 | case APIC_ESR: |
| 1660 | if (apic_x2apic_mode(apic) && val != 0) { |
Jan Kiszka | 7712de8 | 2011-09-12 11:25:51 +0200 | [diff] [blame] | 1661 | apic_debug("KVM_WRITE:ESR not zero %x\n", val); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1662 | ret = 1; |
| 1663 | } |
| 1664 | break; |
| 1665 | |
| 1666 | case APIC_SELF_IPI: |
| 1667 | if (apic_x2apic_mode(apic)) { |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1668 | kvm_lapic_reg_write(apic, APIC_ICR, 0x40000 | (val & 0xff)); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1669 | } else |
| 1670 | ret = 1; |
| 1671 | break; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1672 | default: |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1673 | ret = 1; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1674 | break; |
| 1675 | } |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1676 | if (ret) |
| 1677 | apic_debug("Local APIC Write to read-only register %x\n", reg); |
| 1678 | return ret; |
| 1679 | } |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1680 | EXPORT_SYMBOL_GPL(kvm_lapic_reg_write); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1681 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 1682 | 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] | 1683 | gpa_t address, int len, const void *data) |
| 1684 | { |
| 1685 | struct kvm_lapic *apic = to_lapic(this); |
| 1686 | unsigned int offset = address - apic->base_address; |
| 1687 | u32 val; |
| 1688 | |
| 1689 | if (!apic_mmio_in_range(apic, address)) |
| 1690 | return -EOPNOTSUPP; |
| 1691 | |
| 1692 | /* |
| 1693 | * APIC register must be aligned on 128-bits boundary. |
| 1694 | * 32/64/128 bits registers must be accessed thru 32 bits. |
| 1695 | * Refer SDM 8.4.1 |
| 1696 | */ |
| 1697 | if (len != 4 || (offset & 0xf)) { |
| 1698 | /* Don't shout loud, $infamous_os would cause only noise. */ |
| 1699 | apic_debug("apic write: bad size=%d %lx\n", len, (long)address); |
Sheng Yang | 756975b | 2009-07-06 11:05:39 +0800 | [diff] [blame] | 1700 | return 0; |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1701 | } |
| 1702 | |
| 1703 | val = *(u32*)data; |
| 1704 | |
| 1705 | /* too common printing */ |
| 1706 | if (offset != APIC_EOI) |
| 1707 | apic_debug("%s: offset 0x%x with length 0x%x, and value is " |
| 1708 | "0x%x\n", __func__, offset, len, val); |
| 1709 | |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1710 | kvm_lapic_reg_write(apic, offset & 0xff0, val); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1711 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 1712 | return 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1713 | } |
| 1714 | |
Kevin Tian | 58fbbf2 | 2011-08-30 13:56:17 +0300 | [diff] [blame] | 1715 | void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu) |
| 1716 | { |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1717 | kvm_lapic_reg_write(vcpu->arch.apic, APIC_EOI, 0); |
Kevin Tian | 58fbbf2 | 2011-08-30 13:56:17 +0300 | [diff] [blame] | 1718 | } |
| 1719 | EXPORT_SYMBOL_GPL(kvm_lapic_set_eoi); |
| 1720 | |
Yang Zhang | 83d4c28 | 2013-01-25 10:18:49 +0800 | [diff] [blame] | 1721 | /* emulate APIC access in a trap manner */ |
| 1722 | void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset) |
| 1723 | { |
| 1724 | u32 val = 0; |
| 1725 | |
| 1726 | /* hw has done the conditional check and inst decode */ |
| 1727 | offset &= 0xff0; |
| 1728 | |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1729 | kvm_lapic_reg_read(vcpu->arch.apic, offset, 4, &val); |
Yang Zhang | 83d4c28 | 2013-01-25 10:18:49 +0800 | [diff] [blame] | 1730 | |
| 1731 | /* TODO: optimize to just emulate side effect w/o one more write */ |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1732 | kvm_lapic_reg_write(vcpu->arch.apic, offset, val); |
Yang Zhang | 83d4c28 | 2013-01-25 10:18:49 +0800 | [diff] [blame] | 1733 | } |
| 1734 | EXPORT_SYMBOL_GPL(kvm_apic_write_nodecode); |
| 1735 | |
Rusty Russell | d589444 | 2007-10-08 10:48:30 +1000 | [diff] [blame] | 1736 | void kvm_free_lapic(struct kvm_vcpu *vcpu) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1737 | { |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 1738 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1739 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1740 | if (!vcpu->arch.apic) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1741 | return; |
| 1742 | |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 1743 | hrtimer_cancel(&apic->lapic_timer.timer); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1744 | |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 1745 | if (!(vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE)) |
| 1746 | static_key_slow_dec_deferred(&apic_hw_disabled); |
| 1747 | |
Radim Krčmář | e462755 | 2014-10-30 15:06:45 +0100 | [diff] [blame] | 1748 | if (!apic->sw_enabled) |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 1749 | static_key_slow_dec_deferred(&apic_sw_disabled); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1750 | |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 1751 | if (apic->regs) |
| 1752 | free_page((unsigned long)apic->regs); |
| 1753 | |
| 1754 | kfree(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1755 | } |
| 1756 | |
| 1757 | /* |
| 1758 | *---------------------------------------------------------------------- |
| 1759 | * LAPIC interface |
| 1760 | *---------------------------------------------------------------------- |
| 1761 | */ |
Wanpeng Li | 498f816 | 2016-10-24 18:23:11 +0800 | [diff] [blame] | 1762 | u64 kvm_get_lapic_target_expiration_tsc(struct kvm_vcpu *vcpu) |
| 1763 | { |
| 1764 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1765 | |
| 1766 | if (!lapic_in_kernel(vcpu)) |
| 1767 | return 0; |
| 1768 | |
| 1769 | return apic->lapic_timer.tscdeadline; |
| 1770 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1771 | |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1772 | u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu) |
| 1773 | { |
| 1774 | struct kvm_lapic *apic = vcpu->arch.apic; |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1775 | |
Wanpeng Li | a10388e | 2016-10-24 18:23:10 +0800 | [diff] [blame] | 1776 | if (!lapic_in_kernel(vcpu) || |
| 1777 | !apic_lvtt_tscdeadline(apic)) |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1778 | return 0; |
| 1779 | |
| 1780 | return apic->lapic_timer.tscdeadline; |
| 1781 | } |
| 1782 | |
| 1783 | void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data) |
| 1784 | { |
| 1785 | struct kvm_lapic *apic = vcpu->arch.apic; |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1786 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 1787 | if (!lapic_in_kernel(vcpu) || apic_lvtt_oneshot(apic) || |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 1788 | apic_lvtt_period(apic)) |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1789 | return; |
| 1790 | |
| 1791 | hrtimer_cancel(&apic->lapic_timer.timer); |
| 1792 | apic->lapic_timer.tscdeadline = data; |
| 1793 | start_apic_timer(apic); |
| 1794 | } |
| 1795 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1796 | void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8) |
| 1797 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1798 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1799 | |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1800 | apic_set_tpr(apic, ((cr8 & 0x0f) << 4) |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 1801 | | (kvm_lapic_get_reg(apic, APIC_TASKPRI) & 4)); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1802 | } |
| 1803 | |
| 1804 | u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu) |
| 1805 | { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1806 | u64 tpr; |
| 1807 | |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 1808 | tpr = (u64) kvm_lapic_get_reg(vcpu->arch.apic, APIC_TASKPRI); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1809 | |
| 1810 | return (tpr & 0xf0) >> 4; |
| 1811 | } |
| 1812 | |
| 1813 | void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value) |
| 1814 | { |
Yang Zhang | 8d14695 | 2013-01-25 10:18:50 +0800 | [diff] [blame] | 1815 | u64 old_value = vcpu->arch.apic_base; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1816 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1817 | |
Jim Mattson | c7dd15b | 2016-11-09 09:50:11 -0800 | [diff] [blame] | 1818 | if (!apic) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1819 | value |= MSR_IA32_APICBASE_BSP; |
Gleb Natapov | c5af89b | 2009-06-09 15:56:26 +0300 | [diff] [blame] | 1820 | |
Jan Kiszka | e66d2ae | 2013-12-29 02:29:30 +0100 | [diff] [blame] | 1821 | vcpu->arch.apic_base = value; |
| 1822 | |
Jim Mattson | c7dd15b | 2016-11-09 09:50:11 -0800 | [diff] [blame] | 1823 | if ((old_value ^ value) & MSR_IA32_APICBASE_ENABLE) |
| 1824 | kvm_update_cpuid(vcpu); |
| 1825 | |
| 1826 | if (!apic) |
| 1827 | return; |
| 1828 | |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 1829 | /* update jump label if enable bit changes */ |
Andrew Jones | 0dce7cd | 2014-01-15 13:39:59 +0100 | [diff] [blame] | 1830 | if ((old_value ^ value) & MSR_IA32_APICBASE_ENABLE) { |
Radim Krčmář | 49bd29b | 2016-07-12 22:09:23 +0200 | [diff] [blame] | 1831 | if (value & MSR_IA32_APICBASE_ENABLE) { |
| 1832 | kvm_apic_set_xapic_id(apic, vcpu->vcpu_id); |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 1833 | static_key_slow_dec_deferred(&apic_hw_disabled); |
Wanpeng Li | 187ca84 | 2016-08-03 12:04:13 +0800 | [diff] [blame] | 1834 | } else { |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 1835 | static_key_slow_inc(&apic_hw_disabled.key); |
Wanpeng Li | 187ca84 | 2016-08-03 12:04:13 +0800 | [diff] [blame] | 1836 | recalculate_apic_map(vcpu->kvm); |
| 1837 | } |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 1838 | } |
| 1839 | |
Yang Zhang | 8d14695 | 2013-01-25 10:18:50 +0800 | [diff] [blame] | 1840 | if ((old_value ^ value) & X2APIC_ENABLE) { |
| 1841 | if (value & X2APIC_ENABLE) { |
Radim Krčmář | 257b9a5 | 2015-05-22 18:45:11 +0200 | [diff] [blame] | 1842 | kvm_apic_set_x2apic_id(apic, vcpu->vcpu_id); |
Yang Zhang | 8d14695 | 2013-01-25 10:18:50 +0800 | [diff] [blame] | 1843 | kvm_x86_ops->set_virtual_x2apic_mode(vcpu, true); |
| 1844 | } else |
| 1845 | kvm_x86_ops->set_virtual_x2apic_mode(vcpu, false); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1846 | } |
Yang Zhang | 8d14695 | 2013-01-25 10:18:50 +0800 | [diff] [blame] | 1847 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1848 | apic->base_address = apic->vcpu->arch.apic_base & |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1849 | MSR_IA32_APICBASE_BASE; |
| 1850 | |
Nadav Amit | db324fe | 2014-11-02 11:54:59 +0200 | [diff] [blame] | 1851 | if ((value & MSR_IA32_APICBASE_ENABLE) && |
| 1852 | apic->base_address != APIC_DEFAULT_PHYS_BASE) |
| 1853 | pr_warn_once("APIC base relocation is unsupported by KVM"); |
| 1854 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1855 | /* with FSB delivery interrupt, we can restart APIC functionality */ |
| 1856 | 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] | 1857 | "0x%lx.\n", apic->vcpu->arch.apic_base, apic->base_address); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1858 | |
| 1859 | } |
| 1860 | |
Nadav Amit | d28bc9d | 2015-04-13 14:34:08 +0300 | [diff] [blame] | 1861 | void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1862 | { |
| 1863 | struct kvm_lapic *apic; |
| 1864 | int i; |
| 1865 | |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 1866 | apic_debug("%s\n", __func__); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1867 | |
| 1868 | ASSERT(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1869 | apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1870 | ASSERT(apic != NULL); |
| 1871 | |
| 1872 | /* 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] | 1873 | hrtimer_cancel(&apic->lapic_timer.timer); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1874 | |
Radim Krčmář | 4d8e772 | 2016-07-12 22:09:25 +0200 | [diff] [blame] | 1875 | if (!init_event) { |
| 1876 | kvm_lapic_set_base(vcpu, APIC_DEFAULT_PHYS_BASE | |
| 1877 | MSR_IA32_APICBASE_ENABLE); |
Radim Krčmář | a92e254 | 2016-07-12 22:09:22 +0200 | [diff] [blame] | 1878 | kvm_apic_set_xapic_id(apic, vcpu->vcpu_id); |
Radim Krčmář | 4d8e772 | 2016-07-12 22:09:25 +0200 | [diff] [blame] | 1879 | } |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 1880 | kvm_apic_set_version(apic->vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1881 | |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1882 | for (i = 0; i < KVM_APIC_LVT_NUM; i++) |
| 1883 | kvm_lapic_set_reg(apic, APIC_LVTT + 0x10 * i, APIC_LVT_MASKED); |
Radim Krčmář | b6ac069 | 2015-06-05 20:57:41 +0200 | [diff] [blame] | 1884 | apic_update_lvtt(apic); |
Paolo Bonzini | 0da029e | 2015-07-23 08:24:42 +0200 | [diff] [blame] | 1885 | if (kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_LINT0_REENABLED)) |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1886 | kvm_lapic_set_reg(apic, APIC_LVT0, |
Nadav Amit | 90de4a1 | 2015-04-13 01:53:41 +0300 | [diff] [blame] | 1887 | SET_APIC_DELIVERY_MODE(0, APIC_MODE_EXTINT)); |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 1888 | apic_manage_nmi_watchdog(apic, kvm_lapic_get_reg(apic, APIC_LVT0)); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1889 | |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1890 | kvm_lapic_set_reg(apic, APIC_DFR, 0xffffffffU); |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 1891 | apic_set_spiv(apic, 0xff); |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1892 | kvm_lapic_set_reg(apic, APIC_TASKPRI, 0); |
Radim Krčmář | c028dd6 | 2015-05-22 19:22:10 +0200 | [diff] [blame] | 1893 | if (!apic_x2apic_mode(apic)) |
| 1894 | kvm_apic_set_ldr(apic, 0); |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1895 | kvm_lapic_set_reg(apic, APIC_ESR, 0); |
| 1896 | kvm_lapic_set_reg(apic, APIC_ICR, 0); |
| 1897 | kvm_lapic_set_reg(apic, APIC_ICR2, 0); |
| 1898 | kvm_lapic_set_reg(apic, APIC_TDCR, 0); |
| 1899 | kvm_lapic_set_reg(apic, APIC_TMICT, 0); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1900 | for (i = 0; i < 8; i++) { |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 1901 | kvm_lapic_set_reg(apic, APIC_IRR + 0x10 * i, 0); |
| 1902 | kvm_lapic_set_reg(apic, APIC_ISR + 0x10 * i, 0); |
| 1903 | kvm_lapic_set_reg(apic, APIC_TMR + 0x10 * i, 0); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1904 | } |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 1905 | apic->irr_pending = vcpu->arch.apicv_active; |
| 1906 | apic->isr_count = vcpu->arch.apicv_active ? 1 : 0; |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 1907 | apic->highest_isr_cache = -1; |
Kevin Pedretti | b33ac88 | 2007-10-21 08:54:53 +0200 | [diff] [blame] | 1908 | update_divide_count(apic); |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1909 | atomic_set(&apic->lapic_timer.pending, 0); |
Gleb Natapov | c5af89b | 2009-06-09 15:56:26 +0300 | [diff] [blame] | 1910 | if (kvm_vcpu_is_bsp(vcpu)) |
Gleb Natapov | 5dbc8f3 | 2012-08-05 15:58:27 +0300 | [diff] [blame] | 1911 | kvm_lapic_set_base(vcpu, |
| 1912 | vcpu->arch.apic_base | MSR_IA32_APICBASE_BSP); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 1913 | vcpu->arch.pv_eoi.msr_val = 0; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1914 | apic_update_ppr(apic); |
| 1915 | |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 1916 | vcpu->arch.apic_arb_prio = 0; |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 1917 | vcpu->arch.apic_attention = 0; |
Gleb Natapov | e103571 | 2009-03-05 16:34:59 +0200 | [diff] [blame] | 1918 | |
Radim Krčmář | 6e50043 | 2016-12-15 18:06:46 +0100 | [diff] [blame] | 1919 | apic_debug("%s: vcpu=%p, id=0x%x, base_msr=" |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 1920 | "0x%016" PRIx64 ", base_address=0x%0lx.\n", __func__, |
Radim Krčmář | 6e50043 | 2016-12-15 18:06:46 +0100 | [diff] [blame] | 1921 | vcpu, kvm_lapic_get_reg(apic, APIC_ID), |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1922 | vcpu->arch.apic_base, apic->base_address); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1923 | } |
| 1924 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1925 | /* |
| 1926 | *---------------------------------------------------------------------- |
| 1927 | * timer interface |
| 1928 | *---------------------------------------------------------------------- |
| 1929 | */ |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1930 | |
Avi Kivity | 2a6eac9 | 2012-07-26 18:01:51 +0300 | [diff] [blame] | 1931 | static bool lapic_is_periodic(struct kvm_lapic *apic) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1932 | { |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 1933 | return apic_lvtt_period(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1934 | } |
| 1935 | |
Marcelo Tosatti | 3d80840 | 2008-04-11 14:53:26 -0300 | [diff] [blame] | 1936 | int apic_has_pending_timer(struct kvm_vcpu *vcpu) |
| 1937 | { |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 1938 | struct kvm_lapic *apic = vcpu->arch.apic; |
Marcelo Tosatti | 3d80840 | 2008-04-11 14:53:26 -0300 | [diff] [blame] | 1939 | |
Paolo Bonzini | 1e3161b4 | 2016-01-08 13:41:16 +0100 | [diff] [blame] | 1940 | if (apic_enabled(apic) && apic_lvt_enabled(apic, APIC_LVTT)) |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 1941 | return atomic_read(&apic->lapic_timer.pending); |
Marcelo Tosatti | 3d80840 | 2008-04-11 14:53:26 -0300 | [diff] [blame] | 1942 | |
| 1943 | return 0; |
| 1944 | } |
| 1945 | |
Avi Kivity | 8934208 | 2011-11-10 14:57:21 +0200 | [diff] [blame] | 1946 | int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type) |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1947 | { |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 1948 | u32 reg = kvm_lapic_get_reg(apic, lvt_type); |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 1949 | int vector, mode, trig_mode; |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1950 | |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 1951 | if (kvm_apic_hw_enabled(apic) && !(reg & APIC_LVT_MASKED)) { |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 1952 | vector = reg & APIC_VECTOR_MASK; |
| 1953 | mode = reg & APIC_MODE_MASK; |
| 1954 | trig_mode = reg & APIC_LVT_LEVEL_TRIGGER; |
Yang Zhang | b4f2225 | 2013-04-11 19:21:37 +0800 | [diff] [blame] | 1955 | return __apic_accept_irq(apic, mode, vector, 1, trig_mode, |
| 1956 | NULL); |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 1957 | } |
| 1958 | return 0; |
| 1959 | } |
| 1960 | |
Jan Kiszka | 8fdb235 | 2008-10-20 10:20:02 +0200 | [diff] [blame] | 1961 | void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu) |
Jan Kiszka | 23930f9 | 2008-09-26 09:30:52 +0200 | [diff] [blame] | 1962 | { |
Jan Kiszka | 8fdb235 | 2008-10-20 10:20:02 +0200 | [diff] [blame] | 1963 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 1964 | |
| 1965 | if (apic) |
| 1966 | kvm_apic_local_deliver(apic, APIC_LVT0); |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 1967 | } |
| 1968 | |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 1969 | static const struct kvm_io_device_ops apic_mmio_ops = { |
| 1970 | .read = apic_mmio_read, |
| 1971 | .write = apic_mmio_write, |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 1972 | }; |
| 1973 | |
Avi Kivity | e9d90d4 | 2012-07-26 18:01:50 +0300 | [diff] [blame] | 1974 | static enum hrtimer_restart apic_timer_fn(struct hrtimer *data) |
| 1975 | { |
| 1976 | struct kvm_timer *ktimer = container_of(data, struct kvm_timer, timer); |
Avi Kivity | 2a6eac9 | 2012-07-26 18:01:51 +0300 | [diff] [blame] | 1977 | struct kvm_lapic *apic = container_of(ktimer, struct kvm_lapic, lapic_timer); |
Avi Kivity | e9d90d4 | 2012-07-26 18:01:50 +0300 | [diff] [blame] | 1978 | |
Radim Krčmář | 5d87db7 | 2014-10-10 19:15:08 +0200 | [diff] [blame] | 1979 | apic_timer_expired(apic); |
Avi Kivity | e9d90d4 | 2012-07-26 18:01:50 +0300 | [diff] [blame] | 1980 | |
Avi Kivity | 2a6eac9 | 2012-07-26 18:01:51 +0300 | [diff] [blame] | 1981 | if (lapic_is_periodic(apic)) { |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 1982 | advance_periodic_target_expiration(apic); |
Avi Kivity | e9d90d4 | 2012-07-26 18:01:50 +0300 | [diff] [blame] | 1983 | hrtimer_add_expires_ns(&ktimer->timer, ktimer->period); |
| 1984 | return HRTIMER_RESTART; |
| 1985 | } else |
| 1986 | return HRTIMER_NORESTART; |
| 1987 | } |
| 1988 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 1989 | int kvm_create_lapic(struct kvm_vcpu *vcpu) |
| 1990 | { |
| 1991 | struct kvm_lapic *apic; |
| 1992 | |
| 1993 | ASSERT(vcpu != NULL); |
| 1994 | apic_debug("apic_init %d\n", vcpu->vcpu_id); |
| 1995 | |
| 1996 | apic = kzalloc(sizeof(*apic), GFP_KERNEL); |
| 1997 | if (!apic) |
| 1998 | goto nomem; |
| 1999 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2000 | vcpu->arch.apic = apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2001 | |
Takuya Yoshikawa | afc2018 | 2011-03-05 12:40:20 +0900 | [diff] [blame] | 2002 | apic->regs = (void *)get_zeroed_page(GFP_KERNEL); |
| 2003 | if (!apic->regs) { |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2004 | printk(KERN_ERR "malloc apic regs error for vcpu %x\n", |
| 2005 | vcpu->vcpu_id); |
Rusty Russell | d589444 | 2007-10-08 10:48:30 +1000 | [diff] [blame] | 2006 | goto nomem_free_apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2007 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2008 | apic->vcpu = vcpu; |
| 2009 | |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 2010 | hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC, |
Luiz Capitulino | 61abdbe | 2016-04-04 16:46:07 -0400 | [diff] [blame] | 2011 | HRTIMER_MODE_ABS_PINNED); |
Avi Kivity | e9d90d4 | 2012-07-26 18:01:50 +0300 | [diff] [blame] | 2012 | apic->lapic_timer.timer.function = apic_timer_fn; |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 2013 | |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 2014 | /* |
| 2015 | * APIC is created enabled. This will prevent kvm_lapic_set_base from |
| 2016 | * thinking that APIC satet has changed. |
| 2017 | */ |
| 2018 | vcpu->arch.apic_base = MSR_IA32_APICBASE_ENABLE; |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 2019 | static_key_slow_inc(&apic_sw_disabled.key); /* sw disabled at reset */ |
Nadav Amit | d28bc9d | 2015-04-13 14:34:08 +0300 | [diff] [blame] | 2020 | kvm_lapic_reset(vcpu, false); |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 2021 | kvm_iodevice_init(&apic->dev, &apic_mmio_ops); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2022 | |
| 2023 | return 0; |
Rusty Russell | d589444 | 2007-10-08 10:48:30 +1000 | [diff] [blame] | 2024 | nomem_free_apic: |
| 2025 | kfree(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2026 | nomem: |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2027 | return -ENOMEM; |
| 2028 | } |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2029 | |
| 2030 | int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu) |
| 2031 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2032 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2033 | int highest_irr; |
| 2034 | |
Paolo Bonzini | f8543d6 | 2016-01-08 13:42:24 +0100 | [diff] [blame] | 2035 | if (!apic_enabled(apic)) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2036 | return -1; |
| 2037 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2038 | apic_update_ppr(apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2039 | highest_irr = apic_find_highest_irr(apic); |
| 2040 | if ((highest_irr == -1) || |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 2041 | ((highest_irr & 0xF0) <= kvm_lapic_get_reg(apic, APIC_PROCPRI))) |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2042 | return -1; |
| 2043 | return highest_irr; |
| 2044 | } |
| 2045 | |
Qing He | 40487c6 | 2007-09-17 14:47:13 +0800 | [diff] [blame] | 2046 | int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu) |
| 2047 | { |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 2048 | u32 lvt0 = kvm_lapic_get_reg(vcpu->arch.apic, APIC_LVT0); |
Qing He | 40487c6 | 2007-09-17 14:47:13 +0800 | [diff] [blame] | 2049 | int r = 0; |
| 2050 | |
Gleb Natapov | c48f149 | 2012-08-05 15:58:33 +0300 | [diff] [blame] | 2051 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) |
Chris Lalancette | e7dca5c | 2010-06-16 17:11:12 -0400 | [diff] [blame] | 2052 | r = 1; |
| 2053 | if ((lvt0 & APIC_LVT_MASKED) == 0 && |
| 2054 | GET_APIC_DELIVERY_MODE(lvt0) == APIC_MODE_EXTINT) |
| 2055 | r = 1; |
Qing He | 40487c6 | 2007-09-17 14:47:13 +0800 | [diff] [blame] | 2056 | return r; |
| 2057 | } |
| 2058 | |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 2059 | void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu) |
| 2060 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2061 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 2062 | |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 2063 | if (atomic_read(&apic->lapic_timer.pending) > 0) { |
Jan Kiszka | f1ed045 | 2013-04-28 14:00:41 +0200 | [diff] [blame] | 2064 | kvm_apic_local_deliver(apic, APIC_LVTT); |
Nadav Amit | fae0ba2 | 2014-08-18 22:42:13 +0300 | [diff] [blame] | 2065 | if (apic_lvtt_tscdeadline(apic)) |
| 2066 | apic->lapic_timer.tscdeadline = 0; |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 2067 | if (apic_lvtt_oneshot(apic)) { |
| 2068 | apic->lapic_timer.tscdeadline = 0; |
Thomas Gleixner | 8b0e195 | 2016-12-25 12:30:41 +0100 | [diff] [blame] | 2069 | apic->lapic_timer.target_expiration = 0; |
Wanpeng Li | 8003c9a | 2016-10-24 18:23:13 +0800 | [diff] [blame] | 2070 | } |
Jan Kiszka | f1ed045 | 2013-04-28 14:00:41 +0200 | [diff] [blame] | 2071 | atomic_set(&apic->lapic_timer.pending, 0); |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 2072 | } |
| 2073 | } |
| 2074 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2075 | int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu) |
| 2076 | { |
| 2077 | int vector = kvm_apic_has_interrupt(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2078 | struct kvm_lapic *apic = vcpu->arch.apic; |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2079 | |
| 2080 | if (vector == -1) |
| 2081 | return -1; |
| 2082 | |
Wanpeng Li | 56cc240 | 2014-08-05 12:42:24 +0800 | [diff] [blame] | 2083 | /* |
| 2084 | * We get here even with APIC virtualization enabled, if doing |
| 2085 | * nested virtualization and L1 runs with the "acknowledge interrupt |
| 2086 | * on exit" mode. Then we cannot inject the interrupt via RVI, |
| 2087 | * because the process would deliver it through the IDT. |
| 2088 | */ |
| 2089 | |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 2090 | apic_set_isr(vector, apic); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2091 | apic_update_ppr(apic); |
| 2092 | apic_clear_irr(vector, apic); |
Andrey Smetanin | 5c919412 | 2015-11-10 15:36:34 +0300 | [diff] [blame] | 2093 | |
| 2094 | if (test_bit(vector, vcpu_to_synic(vcpu)->auto_eoi_bitmap)) { |
| 2095 | apic_clear_isr(vector, apic); |
| 2096 | apic_update_ppr(apic); |
| 2097 | } |
| 2098 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2099 | return vector; |
| 2100 | } |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 2101 | |
Radim Krčmář | a92e254 | 2016-07-12 22:09:22 +0200 | [diff] [blame] | 2102 | static int kvm_apic_state_fixup(struct kvm_vcpu *vcpu, |
| 2103 | struct kvm_lapic_state *s, bool set) |
| 2104 | { |
| 2105 | if (apic_x2apic_mode(vcpu->arch.apic)) { |
| 2106 | u32 *id = (u32 *)(s->regs + APIC_ID); |
| 2107 | |
Radim Krčmář | 37131313 | 2016-07-12 22:09:27 +0200 | [diff] [blame] | 2108 | if (vcpu->kvm->arch.x2apic_format) { |
| 2109 | if (*id != vcpu->vcpu_id) |
| 2110 | return -EINVAL; |
| 2111 | } else { |
| 2112 | if (set) |
| 2113 | *id >>= 24; |
| 2114 | else |
| 2115 | *id <<= 24; |
| 2116 | } |
Radim Krčmář | a92e254 | 2016-07-12 22:09:22 +0200 | [diff] [blame] | 2117 | } |
| 2118 | |
| 2119 | return 0; |
| 2120 | } |
| 2121 | |
| 2122 | int kvm_apic_get_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s) |
| 2123 | { |
| 2124 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof(*s)); |
| 2125 | return kvm_apic_state_fixup(vcpu, s, false); |
| 2126 | } |
| 2127 | |
| 2128 | int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s) |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 2129 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2130 | struct kvm_lapic *apic = vcpu->arch.apic; |
Radim Krčmář | a92e254 | 2016-07-12 22:09:22 +0200 | [diff] [blame] | 2131 | int r; |
| 2132 | |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 2133 | |
Gleb Natapov | 5dbc8f3 | 2012-08-05 15:58:27 +0300 | [diff] [blame] | 2134 | kvm_lapic_set_base(vcpu, vcpu->arch.apic_base); |
Gleb Natapov | 64eb062 | 2012-08-08 15:24:36 +0300 | [diff] [blame] | 2135 | /* set SPIV separately to get count of SW disabled APICs right */ |
| 2136 | apic_set_spiv(apic, *((u32 *)(s->regs + APIC_SPIV))); |
Radim Krčmář | a92e254 | 2016-07-12 22:09:22 +0200 | [diff] [blame] | 2137 | |
| 2138 | r = kvm_apic_state_fixup(vcpu, s, true); |
| 2139 | if (r) |
| 2140 | return r; |
Gleb Natapov | 64eb062 | 2012-08-08 15:24:36 +0300 | [diff] [blame] | 2141 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
Radim Krčmář | a92e254 | 2016-07-12 22:09:22 +0200 | [diff] [blame] | 2142 | |
| 2143 | recalculate_apic_map(vcpu->kvm); |
Gleb Natapov | fc61b80 | 2009-07-05 17:39:35 +0300 | [diff] [blame] | 2144 | kvm_apic_set_version(vcpu); |
| 2145 | |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 2146 | apic_update_ppr(apic); |
Marcelo Tosatti | d3c7b77 | 2009-02-23 10:57:41 -0300 | [diff] [blame] | 2147 | hrtimer_cancel(&apic->lapic_timer.timer); |
Radim Krčmář | b6ac069 | 2015-06-05 20:57:41 +0200 | [diff] [blame] | 2148 | apic_update_lvtt(apic); |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 2149 | apic_manage_nmi_watchdog(apic, kvm_lapic_get_reg(apic, APIC_LVT0)); |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 2150 | update_divide_count(apic); |
| 2151 | start_apic_timer(apic); |
Marcelo Tosatti | 6e24a6e | 2009-12-14 17:37:35 -0200 | [diff] [blame] | 2152 | apic->irr_pending = true; |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 2153 | apic->isr_count = vcpu->arch.apicv_active ? |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 2154 | 1 : count_vectors(apic->regs + APIC_ISR); |
Michael S. Tsirkin | 8680b94 | 2012-06-24 19:24:26 +0300 | [diff] [blame] | 2155 | apic->highest_isr_cache = -1; |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 2156 | if (vcpu->arch.apicv_active) { |
Suravee Suthikulpanit | be8ca17 | 2016-05-04 14:09:49 -0500 | [diff] [blame] | 2157 | if (kvm_x86_ops->apicv_post_state_restore) |
| 2158 | kvm_x86_ops->apicv_post_state_restore(vcpu); |
Wei Wang | 4114c27 | 2014-11-05 10:53:43 +0800 | [diff] [blame] | 2159 | kvm_x86_ops->hwapic_irr_update(vcpu, |
| 2160 | apic_find_highest_irr(apic)); |
Paolo Bonzini | 67c9ddd | 2016-05-10 17:01:23 +0200 | [diff] [blame] | 2161 | kvm_x86_ops->hwapic_isr_update(vcpu, |
Tiejun Chen | b4eef9b | 2014-12-22 10:32:57 +0100 | [diff] [blame] | 2162 | apic_find_highest_isr(apic)); |
Andrey Smetanin | d62caab | 2015-11-10 15:36:33 +0300 | [diff] [blame] | 2163 | } |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 2164 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Steve Rutherford | 49df639 | 2015-07-29 23:21:40 -0700 | [diff] [blame] | 2165 | if (ioapic_in_kernel(vcpu->kvm)) |
| 2166 | kvm_rtc_eoi_tracking_restore_one(vcpu); |
Radim Krčmář | 0669a51 | 2015-10-30 15:48:20 +0100 | [diff] [blame] | 2167 | |
| 2168 | vcpu->arch.apic_arb_prio = 0; |
Radim Krčmář | a92e254 | 2016-07-12 22:09:22 +0200 | [diff] [blame] | 2169 | |
| 2170 | return 0; |
Eddie Dong | 96ad2cc | 2007-09-06 12:22:56 +0300 | [diff] [blame] | 2171 | } |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 2172 | |
Avi Kivity | 2f52d58 | 2008-01-16 12:49:30 +0200 | [diff] [blame] | 2173 | void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 2174 | { |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 2175 | struct hrtimer *timer; |
| 2176 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 2177 | if (!lapic_in_kernel(vcpu)) |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 2178 | return; |
| 2179 | |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 2180 | timer = &vcpu->arch.apic->lapic_timer.timer; |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 2181 | if (hrtimer_cancel(timer)) |
Luiz Capitulino | 61abdbe | 2016-04-04 16:46:07 -0400 | [diff] [blame] | 2182 | hrtimer_start_expires(timer, HRTIMER_MODE_ABS_PINNED); |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 2183 | } |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2184 | |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2185 | /* |
| 2186 | * apic_sync_pv_eoi_from_guest - called on vmexit or cancel interrupt |
| 2187 | * |
| 2188 | * Detect whether guest triggered PV EOI since the |
| 2189 | * last entry. If yes, set EOI on guests's behalf. |
| 2190 | * Clear PV EOI in guest memory in any case. |
| 2191 | */ |
| 2192 | static void apic_sync_pv_eoi_from_guest(struct kvm_vcpu *vcpu, |
| 2193 | struct kvm_lapic *apic) |
| 2194 | { |
| 2195 | bool pending; |
| 2196 | int vector; |
| 2197 | /* |
| 2198 | * PV EOI state is derived from KVM_APIC_PV_EOI_PENDING in host |
| 2199 | * and KVM_PV_EOI_ENABLED in guest memory as follows: |
| 2200 | * |
| 2201 | * KVM_APIC_PV_EOI_PENDING is unset: |
| 2202 | * -> host disabled PV EOI. |
| 2203 | * KVM_APIC_PV_EOI_PENDING is set, KVM_PV_EOI_ENABLED is set: |
| 2204 | * -> host enabled PV EOI, guest did not execute EOI yet. |
| 2205 | * KVM_APIC_PV_EOI_PENDING is set, KVM_PV_EOI_ENABLED is unset: |
| 2206 | * -> host enabled PV EOI, guest executed EOI. |
| 2207 | */ |
| 2208 | BUG_ON(!pv_eoi_enabled(vcpu)); |
| 2209 | pending = pv_eoi_get_pending(vcpu); |
| 2210 | /* |
| 2211 | * Clear pending bit in any case: it will be set again on vmentry. |
| 2212 | * While this might not be ideal from performance point of view, |
| 2213 | * this makes sure pv eoi is only enabled when we know it's safe. |
| 2214 | */ |
| 2215 | pv_eoi_clr_pending(vcpu); |
| 2216 | if (pending) |
| 2217 | return; |
| 2218 | vector = apic_set_eoi(apic); |
| 2219 | trace_kvm_pv_eoi(apic, vector); |
| 2220 | } |
| 2221 | |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2222 | void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu) |
| 2223 | { |
| 2224 | u32 data; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2225 | |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2226 | if (test_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention)) |
| 2227 | apic_sync_pv_eoi_from_guest(vcpu, vcpu->arch.apic); |
| 2228 | |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 2229 | if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention)) |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2230 | return; |
| 2231 | |
Nicholas Krause | 603242a | 2015-08-05 10:44:40 -0400 | [diff] [blame] | 2232 | if (kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.apic->vapic_cache, &data, |
| 2233 | sizeof(u32))) |
| 2234 | return; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2235 | |
| 2236 | apic_set_tpr(vcpu->arch.apic, data & 0xff); |
| 2237 | } |
| 2238 | |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2239 | /* |
| 2240 | * apic_sync_pv_eoi_to_guest - called before vmentry |
| 2241 | * |
| 2242 | * Detect whether it's safe to enable PV EOI and |
| 2243 | * if yes do so. |
| 2244 | */ |
| 2245 | static void apic_sync_pv_eoi_to_guest(struct kvm_vcpu *vcpu, |
| 2246 | struct kvm_lapic *apic) |
| 2247 | { |
| 2248 | if (!pv_eoi_enabled(vcpu) || |
| 2249 | /* IRR set or many bits in ISR: could be nested. */ |
| 2250 | apic->irr_pending || |
| 2251 | /* Cache not set: could be safe but we don't bother. */ |
| 2252 | apic->highest_isr_cache == -1 || |
| 2253 | /* Need EOI to update ioapic. */ |
Paolo Bonzini | 3bb345f | 2015-07-29 10:43:18 +0200 | [diff] [blame] | 2254 | kvm_ioapic_handles_vector(apic, apic->highest_isr_cache)) { |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2255 | /* |
| 2256 | * PV EOI was disabled by apic_sync_pv_eoi_from_guest |
| 2257 | * so we need not do anything here. |
| 2258 | */ |
| 2259 | return; |
| 2260 | } |
| 2261 | |
| 2262 | pv_eoi_set_pending(apic->vcpu); |
| 2263 | } |
| 2264 | |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2265 | void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu) |
| 2266 | { |
| 2267 | u32 data, tpr; |
| 2268 | int max_irr, max_isr; |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2269 | struct kvm_lapic *apic = vcpu->arch.apic; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2270 | |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2271 | apic_sync_pv_eoi_to_guest(vcpu, apic); |
| 2272 | |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 2273 | if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention)) |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2274 | return; |
| 2275 | |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 2276 | tpr = kvm_lapic_get_reg(apic, APIC_TASKPRI) & 0xff; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2277 | max_irr = apic_find_highest_irr(apic); |
| 2278 | if (max_irr < 0) |
| 2279 | max_irr = 0; |
| 2280 | max_isr = apic_find_highest_isr(apic); |
| 2281 | if (max_isr < 0) |
| 2282 | max_isr = 0; |
| 2283 | data = (tpr & 0xff) | ((max_isr & 0xf0) << 8) | (max_irr << 24); |
| 2284 | |
Andy Honig | fda4e2e | 2013-11-20 10:23:22 -0800 | [diff] [blame] | 2285 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apic->vapic_cache, &data, |
| 2286 | sizeof(u32)); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2287 | } |
| 2288 | |
Andy Honig | fda4e2e | 2013-11-20 10:23:22 -0800 | [diff] [blame] | 2289 | 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] | 2290 | { |
Andy Honig | fda4e2e | 2013-11-20 10:23:22 -0800 | [diff] [blame] | 2291 | if (vapic_addr) { |
| 2292 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, |
| 2293 | &vcpu->arch.apic->vapic_cache, |
| 2294 | vapic_addr, sizeof(u32))) |
| 2295 | return -EINVAL; |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 2296 | __set_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention); |
Andy Honig | fda4e2e | 2013-11-20 10:23:22 -0800 | [diff] [blame] | 2297 | } else { |
Gleb Natapov | 4138377 | 2012-04-19 14:06:29 +0300 | [diff] [blame] | 2298 | __clear_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention); |
Andy Honig | fda4e2e | 2013-11-20 10:23:22 -0800 | [diff] [blame] | 2299 | } |
| 2300 | |
| 2301 | vcpu->arch.apic->vapic_addr = vapic_addr; |
| 2302 | return 0; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2303 | } |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2304 | |
| 2305 | int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 2306 | { |
| 2307 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 2308 | u32 reg = (msr - APIC_BASE_MSR) << 4; |
| 2309 | |
Paolo Bonzini | 35754c9 | 2015-07-29 12:05:37 +0200 | [diff] [blame] | 2310 | if (!lapic_in_kernel(vcpu) || !apic_x2apic_mode(apic)) |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2311 | return 1; |
| 2312 | |
Nadav Amit | c69d3d9 | 2014-11-26 17:56:25 +0200 | [diff] [blame] | 2313 | if (reg == APIC_ICR2) |
| 2314 | return 1; |
| 2315 | |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2316 | /* if this is ICR write vector before command */ |
Radim Krčmář | decdc28 | 2014-11-26 17:07:05 +0100 | [diff] [blame] | 2317 | if (reg == APIC_ICR) |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 2318 | kvm_lapic_reg_write(apic, APIC_ICR2, (u32)(data >> 32)); |
| 2319 | return kvm_lapic_reg_write(apic, reg, (u32)data); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2320 | } |
| 2321 | |
| 2322 | int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data) |
| 2323 | { |
| 2324 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 2325 | u32 reg = (msr - APIC_BASE_MSR) << 4, low, high = 0; |
| 2326 | |
Paolo Bonzini | 35754c9 | 2015-07-29 12:05:37 +0200 | [diff] [blame] | 2327 | if (!lapic_in_kernel(vcpu) || !apic_x2apic_mode(apic)) |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2328 | return 1; |
| 2329 | |
Nadav Amit | c69d3d9 | 2014-11-26 17:56:25 +0200 | [diff] [blame] | 2330 | if (reg == APIC_DFR || reg == APIC_ICR2) { |
| 2331 | apic_debug("KVM_APIC_READ: read x2apic reserved register %x\n", |
| 2332 | reg); |
| 2333 | return 1; |
| 2334 | } |
| 2335 | |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 2336 | if (kvm_lapic_reg_read(apic, reg, 4, &low)) |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2337 | return 1; |
Radim Krčmář | decdc28 | 2014-11-26 17:07:05 +0100 | [diff] [blame] | 2338 | if (reg == APIC_ICR) |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 2339 | kvm_lapic_reg_read(apic, APIC_ICR2, 4, &high); |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2340 | |
| 2341 | *data = (((u64)high) << 32) | low; |
| 2342 | |
| 2343 | return 0; |
| 2344 | } |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 2345 | |
| 2346 | int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 reg, u64 data) |
| 2347 | { |
| 2348 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 2349 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 2350 | if (!lapic_in_kernel(vcpu)) |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 2351 | return 1; |
| 2352 | |
| 2353 | /* if this is ICR write vector before command */ |
| 2354 | if (reg == APIC_ICR) |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 2355 | kvm_lapic_reg_write(apic, APIC_ICR2, (u32)(data >> 32)); |
| 2356 | return kvm_lapic_reg_write(apic, reg, (u32)data); |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 2357 | } |
| 2358 | |
| 2359 | int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 reg, u64 *data) |
| 2360 | { |
| 2361 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 2362 | u32 low, high = 0; |
| 2363 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 2364 | if (!lapic_in_kernel(vcpu)) |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 2365 | return 1; |
| 2366 | |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 2367 | if (kvm_lapic_reg_read(apic, reg, 4, &low)) |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 2368 | return 1; |
| 2369 | if (reg == APIC_ICR) |
Suravee Suthikulpanit | 1e6e275 | 2016-05-04 14:09:40 -0500 | [diff] [blame] | 2370 | kvm_lapic_reg_read(apic, APIC_ICR2, 4, &high); |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 2371 | |
| 2372 | *data = (((u64)high) << 32) | low; |
| 2373 | |
| 2374 | return 0; |
| 2375 | } |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2376 | |
| 2377 | int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data) |
| 2378 | { |
| 2379 | u64 addr = data & ~KVM_MSR_ENABLED; |
| 2380 | if (!IS_ALIGNED(addr, 4)) |
| 2381 | return 1; |
| 2382 | |
| 2383 | vcpu->arch.pv_eoi.msr_val = data; |
| 2384 | if (!pv_eoi_enabled(vcpu)) |
| 2385 | return 0; |
| 2386 | return kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.pv_eoi.data, |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 2387 | addr, sizeof(u8)); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2388 | } |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 2389 | |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 2390 | void kvm_apic_accept_events(struct kvm_vcpu *vcpu) |
| 2391 | { |
| 2392 | struct kvm_lapic *apic = vcpu->arch.apic; |
Paolo Bonzini | 2b4a273 | 2014-11-24 14:35:24 +0100 | [diff] [blame] | 2393 | u8 sipi_vector; |
Gleb Natapov | 299018f | 2013-06-03 11:30:02 +0300 | [diff] [blame] | 2394 | unsigned long pe; |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 2395 | |
Paolo Bonzini | bce87cc | 2016-01-08 13:48:51 +0100 | [diff] [blame] | 2396 | if (!lapic_in_kernel(vcpu) || !apic->pending_events) |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 2397 | return; |
| 2398 | |
Paolo Bonzini | cd7764f | 2015-06-04 10:41:21 +0200 | [diff] [blame] | 2399 | /* |
| 2400 | * INITs are latched while in SMM. Because an SMM CPU cannot |
| 2401 | * be in KVM_MP_STATE_INIT_RECEIVED state, just eat SIPIs |
| 2402 | * and delay processing of INIT until the next RSM. |
| 2403 | */ |
| 2404 | if (is_smm(vcpu)) { |
| 2405 | WARN_ON_ONCE(vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED); |
| 2406 | if (test_bit(KVM_APIC_SIPI, &apic->pending_events)) |
| 2407 | clear_bit(KVM_APIC_SIPI, &apic->pending_events); |
| 2408 | return; |
| 2409 | } |
Gleb Natapov | 299018f | 2013-06-03 11:30:02 +0300 | [diff] [blame] | 2410 | |
Paolo Bonzini | cd7764f | 2015-06-04 10:41:21 +0200 | [diff] [blame] | 2411 | pe = xchg(&apic->pending_events, 0); |
Gleb Natapov | 299018f | 2013-06-03 11:30:02 +0300 | [diff] [blame] | 2412 | if (test_bit(KVM_APIC_INIT, &pe)) { |
Nadav Amit | d28bc9d | 2015-04-13 14:34:08 +0300 | [diff] [blame] | 2413 | kvm_lapic_reset(vcpu, true); |
| 2414 | kvm_vcpu_reset(vcpu, true); |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 2415 | if (kvm_vcpu_is_bsp(apic->vcpu)) |
| 2416 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
| 2417 | else |
| 2418 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; |
| 2419 | } |
Gleb Natapov | 299018f | 2013-06-03 11:30:02 +0300 | [diff] [blame] | 2420 | if (test_bit(KVM_APIC_SIPI, &pe) && |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 2421 | vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { |
| 2422 | /* evaluate pending_events before reading the vector */ |
| 2423 | smp_rmb(); |
| 2424 | sipi_vector = apic->sipi_vector; |
Nadav Amit | 98eff52 | 2014-06-29 12:28:51 +0300 | [diff] [blame] | 2425 | apic_debug("vcpu %d received sipi with vector # %x\n", |
Jan Kiszka | 66450a2 | 2013-03-13 12:42:34 +0100 | [diff] [blame] | 2426 | vcpu->vcpu_id, sipi_vector); |
| 2427 | kvm_vcpu_deliver_sipi_vector(vcpu, sipi_vector); |
| 2428 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
| 2429 | } |
| 2430 | } |
| 2431 | |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 2432 | void kvm_lapic_init(void) |
| 2433 | { |
| 2434 | /* do not patch jump label more than once per second */ |
| 2435 | jump_label_rate_limit(&apic_hw_disabled, HZ); |
Gleb Natapov | f8c1ea1 | 2012-08-05 15:58:31 +0300 | [diff] [blame] | 2436 | jump_label_rate_limit(&apic_sw_disabled, HZ); |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 2437 | } |