Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2001 MandrakeSoft S.A. |
Avi Kivity | 221d059 | 2010-05-23 18:37:00 +0300 | [diff] [blame] | 3 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 4 | * |
| 5 | * MandrakeSoft S.A. |
| 6 | * 43, rue d'Aboukir |
| 7 | * 75002 Paris - France |
| 8 | * http://www.linux-mandrake.com/ |
| 9 | * http://www.mandrakesoft.com/ |
| 10 | * |
| 11 | * This library is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU Lesser General Public |
| 13 | * License as published by the Free Software Foundation; either |
| 14 | * version 2 of the License, or (at your option) any later version. |
| 15 | * |
| 16 | * This library is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 19 | * Lesser General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU Lesser General Public |
| 22 | * License along with this library; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 24 | * |
| 25 | * Yunhong Jiang <yunhong.jiang@intel.com> |
| 26 | * Yaozu (Eddie) Dong <eddie.dong@intel.com> |
| 27 | * Based on Xen 3.1 code. |
| 28 | */ |
| 29 | |
Avi Kivity | edf8841 | 2007-12-16 11:02:48 +0200 | [diff] [blame] | 30 | #include <linux/kvm_host.h> |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 31 | #include <linux/kvm.h> |
| 32 | #include <linux/mm.h> |
| 33 | #include <linux/highmem.h> |
| 34 | #include <linux/smp.h> |
| 35 | #include <linux/hrtimer.h> |
| 36 | #include <linux/io.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 37 | #include <linux/slab.h> |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 38 | #include <linux/export.h> |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 39 | #include <asm/processor.h> |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 40 | #include <asm/page.h> |
| 41 | #include <asm/current.h> |
Gleb Natapov | 1000ff8 | 2009-07-07 16:00:57 +0300 | [diff] [blame] | 42 | #include <trace/events/kvm.h> |
Zhang Xiantao | 8247019 | 2007-12-17 13:59:56 +0800 | [diff] [blame] | 43 | |
| 44 | #include "ioapic.h" |
| 45 | #include "lapic.h" |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 46 | #include "irq.h" |
Zhang Xiantao | 8247019 | 2007-12-17 13:59:56 +0800 | [diff] [blame] | 47 | |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 48 | #if 0 |
| 49 | #define ioapic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg) |
| 50 | #else |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 51 | #define ioapic_debug(fmt, arg...) |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 52 | #endif |
Paolo Bonzini | 0b10a1c | 2014-03-18 11:51:29 +0100 | [diff] [blame] | 53 | static int ioapic_service(struct kvm_ioapic *vioapic, int irq, |
Yang Zhang | aa2fbe6 | 2013-04-11 19:21:40 +0800 | [diff] [blame] | 54 | bool line_status); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 55 | |
| 56 | static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic, |
| 57 | unsigned long addr, |
| 58 | unsigned long length) |
| 59 | { |
| 60 | unsigned long result = 0; |
| 61 | |
| 62 | switch (ioapic->ioregsel) { |
| 63 | case IOAPIC_REG_VERSION: |
| 64 | result = ((((IOAPIC_NUM_PINS - 1) & 0xff) << 16) |
| 65 | | (IOAPIC_VERSION_ID & 0xff)); |
| 66 | break; |
| 67 | |
| 68 | case IOAPIC_REG_APIC_ID: |
| 69 | case IOAPIC_REG_ARB_ID: |
| 70 | result = ((ioapic->id & 0xf) << 24); |
| 71 | break; |
| 72 | |
| 73 | default: |
| 74 | { |
| 75 | u32 redir_index = (ioapic->ioregsel - 0x10) >> 1; |
| 76 | u64 redir_content; |
| 77 | |
Andy Honig | a2c118b | 2013-02-20 14:49:16 -0800 | [diff] [blame] | 78 | if (redir_index < IOAPIC_NUM_PINS) |
| 79 | redir_content = |
| 80 | ioapic->redirtbl[redir_index].bits; |
| 81 | else |
| 82 | redir_content = ~0ULL; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 83 | |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 84 | result = (ioapic->ioregsel & 0x1) ? |
| 85 | (redir_content >> 32) & 0xffffffff : |
| 86 | redir_content & 0xffffffff; |
| 87 | break; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | return result; |
| 92 | } |
| 93 | |
Yang Zhang | 1060691 | 2013-04-11 19:21:38 +0800 | [diff] [blame] | 94 | static void rtc_irq_eoi_tracking_reset(struct kvm_ioapic *ioapic) |
| 95 | { |
| 96 | ioapic->rtc_status.pending_eoi = 0; |
Radim Krčmář | 81cdb25 | 2016-11-23 21:15:27 +0100 | [diff] [blame] | 97 | bitmap_zero(ioapic->rtc_status.dest_map.map, KVM_MAX_VCPU_ID); |
Yang Zhang | 1060691 | 2013-04-11 19:21:38 +0800 | [diff] [blame] | 98 | } |
| 99 | |
Paolo Bonzini | 4009b24 | 2014-03-28 20:41:51 +0100 | [diff] [blame] | 100 | static void kvm_rtc_eoi_tracking_restore_all(struct kvm_ioapic *ioapic); |
| 101 | |
| 102 | static void rtc_status_pending_eoi_check_valid(struct kvm_ioapic *ioapic) |
| 103 | { |
| 104 | if (WARN_ON(ioapic->rtc_status.pending_eoi < 0)) |
| 105 | kvm_rtc_eoi_tracking_restore_all(ioapic); |
| 106 | } |
| 107 | |
Yang Zhang | 1060691 | 2013-04-11 19:21:38 +0800 | [diff] [blame] | 108 | static void __rtc_irq_eoi_tracking_restore_one(struct kvm_vcpu *vcpu) |
| 109 | { |
| 110 | bool new_val, old_val; |
| 111 | struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic; |
Paolo Bonzini | b0eaf45 | 2016-09-14 23:39:12 +0200 | [diff] [blame] | 112 | struct dest_map *dest_map = &ioapic->rtc_status.dest_map; |
Yang Zhang | 1060691 | 2013-04-11 19:21:38 +0800 | [diff] [blame] | 113 | union kvm_ioapic_redirect_entry *e; |
| 114 | |
| 115 | e = &ioapic->redirtbl[RTC_GSI]; |
| 116 | if (!kvm_apic_match_dest(vcpu, NULL, 0, e->fields.dest_id, |
| 117 | e->fields.dest_mode)) |
| 118 | return; |
| 119 | |
| 120 | new_val = kvm_apic_pending_eoi(vcpu, e->fields.vector); |
Paolo Bonzini | b0eaf45 | 2016-09-14 23:39:12 +0200 | [diff] [blame] | 121 | old_val = test_bit(vcpu->vcpu_id, dest_map->map); |
Yang Zhang | 1060691 | 2013-04-11 19:21:38 +0800 | [diff] [blame] | 122 | |
| 123 | if (new_val == old_val) |
| 124 | return; |
| 125 | |
| 126 | if (new_val) { |
Paolo Bonzini | b0eaf45 | 2016-09-14 23:39:12 +0200 | [diff] [blame] | 127 | __set_bit(vcpu->vcpu_id, dest_map->map); |
| 128 | dest_map->vectors[vcpu->vcpu_id] = e->fields.vector; |
Yang Zhang | 1060691 | 2013-04-11 19:21:38 +0800 | [diff] [blame] | 129 | ioapic->rtc_status.pending_eoi++; |
| 130 | } else { |
Paolo Bonzini | b0eaf45 | 2016-09-14 23:39:12 +0200 | [diff] [blame] | 131 | __clear_bit(vcpu->vcpu_id, dest_map->map); |
Yang Zhang | 1060691 | 2013-04-11 19:21:38 +0800 | [diff] [blame] | 132 | ioapic->rtc_status.pending_eoi--; |
Paolo Bonzini | 4009b24 | 2014-03-28 20:41:51 +0100 | [diff] [blame] | 133 | rtc_status_pending_eoi_check_valid(ioapic); |
Yang Zhang | 1060691 | 2013-04-11 19:21:38 +0800 | [diff] [blame] | 134 | } |
Yang Zhang | 1060691 | 2013-04-11 19:21:38 +0800 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu) |
| 138 | { |
| 139 | struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic; |
| 140 | |
| 141 | spin_lock(&ioapic->lock); |
| 142 | __rtc_irq_eoi_tracking_restore_one(vcpu); |
| 143 | spin_unlock(&ioapic->lock); |
| 144 | } |
| 145 | |
| 146 | static void kvm_rtc_eoi_tracking_restore_all(struct kvm_ioapic *ioapic) |
| 147 | { |
| 148 | struct kvm_vcpu *vcpu; |
| 149 | int i; |
| 150 | |
| 151 | if (RTC_GSI >= IOAPIC_NUM_PINS) |
| 152 | return; |
| 153 | |
| 154 | rtc_irq_eoi_tracking_reset(ioapic); |
| 155 | kvm_for_each_vcpu(i, vcpu, ioapic->kvm) |
| 156 | __rtc_irq_eoi_tracking_restore_one(vcpu); |
| 157 | } |
| 158 | |
Yang Zhang | 2c2bf01 | 2013-04-11 19:21:41 +0800 | [diff] [blame] | 159 | static void rtc_irq_eoi(struct kvm_ioapic *ioapic, struct kvm_vcpu *vcpu) |
| 160 | { |
Joerg Roedel | 9e4aabe | 2016-02-29 16:04:43 +0100 | [diff] [blame] | 161 | if (test_and_clear_bit(vcpu->vcpu_id, |
| 162 | ioapic->rtc_status.dest_map.map)) { |
Yang Zhang | 2c2bf01 | 2013-04-11 19:21:41 +0800 | [diff] [blame] | 163 | --ioapic->rtc_status.pending_eoi; |
Paolo Bonzini | 4009b24 | 2014-03-28 20:41:51 +0100 | [diff] [blame] | 164 | rtc_status_pending_eoi_check_valid(ioapic); |
| 165 | } |
Yang Zhang | 2c2bf01 | 2013-04-11 19:21:41 +0800 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | static bool rtc_irq_check_coalesced(struct kvm_ioapic *ioapic) |
| 169 | { |
| 170 | if (ioapic->rtc_status.pending_eoi > 0) |
| 171 | return true; /* coalesced */ |
| 172 | |
| 173 | return false; |
| 174 | } |
| 175 | |
Paolo Bonzini | 44847de | 2014-03-18 12:00:14 +0100 | [diff] [blame] | 176 | static int ioapic_set_irq(struct kvm_ioapic *ioapic, unsigned int irq, |
| 177 | int irq_level, bool line_status) |
| 178 | { |
| 179 | union kvm_ioapic_redirect_entry entry; |
| 180 | u32 mask = 1 << irq; |
| 181 | u32 old_irr; |
| 182 | int edge, ret; |
| 183 | |
| 184 | entry = ioapic->redirtbl[irq]; |
| 185 | edge = (entry.fields.trig_mode == IOAPIC_EDGE_TRIG); |
| 186 | |
| 187 | if (!irq_level) { |
| 188 | ioapic->irr &= ~mask; |
| 189 | ret = 1; |
| 190 | goto out; |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * Return 0 for coalesced interrupts; for edge-triggered interrupts, |
| 195 | * this only happens if a previous edge has not been delivered due |
| 196 | * do masking. For level interrupts, the remote_irr field tells |
| 197 | * us if the interrupt is waiting for an EOI. |
| 198 | * |
| 199 | * RTC is special: it is edge-triggered, but userspace likes to know |
| 200 | * if it has been already ack-ed via EOI because coalesced RTC |
| 201 | * interrupts lead to time drift in Windows guests. So we track |
| 202 | * EOI manually for the RTC interrupt. |
| 203 | */ |
| 204 | if (irq == RTC_GSI && line_status && |
| 205 | rtc_irq_check_coalesced(ioapic)) { |
| 206 | ret = 0; |
| 207 | goto out; |
| 208 | } |
| 209 | |
| 210 | old_irr = ioapic->irr; |
| 211 | ioapic->irr |= mask; |
Nikita Leshenko | 7d22536 | 2017-11-05 15:52:31 +0200 | [diff] [blame] | 212 | if (edge) { |
Wincy Van | 5bda6ee | 2014-12-24 11:14:29 +0800 | [diff] [blame] | 213 | ioapic->irr_delivered &= ~mask; |
Nikita Leshenko | 7d22536 | 2017-11-05 15:52:31 +0200 | [diff] [blame] | 214 | if (old_irr == ioapic->irr) { |
| 215 | ret = 0; |
| 216 | goto out; |
| 217 | } |
Paolo Bonzini | 44847de | 2014-03-18 12:00:14 +0100 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | ret = ioapic_service(ioapic, irq, line_status); |
| 221 | |
| 222 | out: |
| 223 | trace_kvm_ioapic_set_irq(entry.bits, irq, ret == 0); |
| 224 | return ret; |
| 225 | } |
| 226 | |
Paolo Bonzini | 673f7b4 | 2014-03-18 11:39:23 +0100 | [diff] [blame] | 227 | static void kvm_ioapic_inject_all(struct kvm_ioapic *ioapic, unsigned long irr) |
| 228 | { |
| 229 | u32 idx; |
| 230 | |
| 231 | rtc_irq_eoi_tracking_reset(ioapic); |
| 232 | for_each_set_bit(idx, &irr, IOAPIC_NUM_PINS) |
| 233 | ioapic_set_irq(ioapic, idx, 1, true); |
| 234 | |
| 235 | kvm_rtc_eoi_tracking_restore_all(ioapic); |
| 236 | } |
| 237 | |
| 238 | |
Andrey Smetanin | 6308630 | 2015-11-10 15:36:32 +0300 | [diff] [blame] | 239 | void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, ulong *ioapic_handled_vectors) |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 240 | { |
| 241 | struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic; |
Joerg Roedel | 4d99ba8 | 2016-02-29 16:04:45 +0100 | [diff] [blame] | 242 | struct dest_map *dest_map = &ioapic->rtc_status.dest_map; |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 243 | union kvm_ioapic_redirect_entry *e; |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 244 | int index; |
| 245 | |
| 246 | spin_lock(&ioapic->lock); |
Joerg Roedel | 4d99ba8 | 2016-02-29 16:04:45 +0100 | [diff] [blame] | 247 | |
| 248 | /* Make sure we see any missing RTC EOI */ |
| 249 | if (test_bit(vcpu->vcpu_id, dest_map->map)) |
| 250 | __set_bit(dest_map->vectors[vcpu->vcpu_id], |
| 251 | ioapic_handled_vectors); |
| 252 | |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 253 | for (index = 0; index < IOAPIC_NUM_PINS; index++) { |
| 254 | e = &ioapic->redirtbl[index]; |
Paolo Bonzini | 0f6c0a7 | 2014-07-30 18:07:24 +0200 | [diff] [blame] | 255 | if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG || |
| 256 | kvm_irq_has_notifier(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index) || |
| 257 | index == RTC_GSI) { |
Yang Zhang | 44944d4 | 2013-04-07 08:25:18 +0800 | [diff] [blame] | 258 | if (kvm_apic_match_dest(vcpu, NULL, 0, |
Radim Krčmář | db2bdcb | 2015-10-08 20:23:34 +0200 | [diff] [blame] | 259 | e->fields.dest_id, e->fields.dest_mode) || |
Nikita Leshenko | 0fc5a36 | 2017-11-05 15:52:29 +0200 | [diff] [blame] | 260 | kvm_apic_pending_eoi(vcpu, e->fields.vector)) |
Yang Zhang | cf9e65b | 2013-04-11 19:25:14 +0800 | [diff] [blame] | 261 | __set_bit(e->fields.vector, |
Andrey Smetanin | 6308630 | 2015-11-10 15:36:32 +0300 | [diff] [blame] | 262 | ioapic_handled_vectors); |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 263 | } |
| 264 | } |
| 265 | spin_unlock(&ioapic->lock); |
| 266 | } |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 267 | |
David Hildenbrand | 993225a | 2017-04-07 10:50:33 +0200 | [diff] [blame] | 268 | void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm) |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 269 | { |
David Hildenbrand | 0bceb15 | 2017-04-07 10:50:25 +0200 | [diff] [blame] | 270 | if (!ioapic_in_kernel(kvm)) |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 271 | return; |
Yang Zhang | 3d81bc7 | 2013-04-11 19:25:13 +0800 | [diff] [blame] | 272 | kvm_make_scan_ioapic_request(kvm); |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 273 | } |
| 274 | |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 275 | static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val) |
| 276 | { |
| 277 | unsigned index; |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 278 | bool mask_before, mask_after; |
Nikita Leshenko | b200dded | 2017-11-05 15:52:33 +0200 | [diff] [blame] | 279 | int old_remote_irr, old_delivery_status; |
Gleb Natapov | 70f93da | 2009-07-05 18:48:12 +0300 | [diff] [blame] | 280 | union kvm_ioapic_redirect_entry *e; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 281 | |
| 282 | switch (ioapic->ioregsel) { |
| 283 | case IOAPIC_REG_VERSION: |
| 284 | /* Writes are ignored. */ |
| 285 | break; |
| 286 | |
| 287 | case IOAPIC_REG_APIC_ID: |
| 288 | ioapic->id = (val >> 24) & 0xf; |
| 289 | break; |
| 290 | |
| 291 | case IOAPIC_REG_ARB_ID: |
| 292 | break; |
| 293 | |
| 294 | default: |
| 295 | index = (ioapic->ioregsel - 0x10) >> 1; |
| 296 | |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 297 | ioapic_debug("change redir index %x val %x\n", index, val); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 298 | if (index >= IOAPIC_NUM_PINS) |
| 299 | return; |
Gleb Natapov | 70f93da | 2009-07-05 18:48:12 +0300 | [diff] [blame] | 300 | e = &ioapic->redirtbl[index]; |
| 301 | mask_before = e->fields.mask; |
Nikita Leshenko | b200dded | 2017-11-05 15:52:33 +0200 | [diff] [blame] | 302 | /* Preserve read-only fields */ |
| 303 | old_remote_irr = e->fields.remote_irr; |
| 304 | old_delivery_status = e->fields.delivery_status; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 305 | if (ioapic->ioregsel & 1) { |
Gleb Natapov | 70f93da | 2009-07-05 18:48:12 +0300 | [diff] [blame] | 306 | e->bits &= 0xffffffff; |
| 307 | e->bits |= (u64) val << 32; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 308 | } else { |
Gleb Natapov | 70f93da | 2009-07-05 18:48:12 +0300 | [diff] [blame] | 309 | e->bits &= ~0xffffffffULL; |
| 310 | e->bits |= (u32) val; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 311 | } |
Nikita Leshenko | b200dded | 2017-11-05 15:52:33 +0200 | [diff] [blame] | 312 | e->fields.remote_irr = old_remote_irr; |
| 313 | e->fields.delivery_status = old_delivery_status; |
Nikita Leshenko | a8bfec2 | 2017-11-05 15:52:32 +0200 | [diff] [blame] | 314 | |
| 315 | /* |
| 316 | * Some OSes (Linux, Xen) assume that Remote IRR bit will |
| 317 | * be cleared by IOAPIC hardware when the entry is configured |
| 318 | * as edge-triggered. This behavior is used to simulate an |
| 319 | * explicit EOI on IOAPICs that don't have the EOI register. |
| 320 | */ |
| 321 | if (e->fields.trig_mode == IOAPIC_EDGE_TRIG) |
| 322 | e->fields.remote_irr = 0; |
| 323 | |
Gleb Natapov | 70f93da | 2009-07-05 18:48:12 +0300 | [diff] [blame] | 324 | mask_after = e->fields.mask; |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 325 | if (mask_before != mask_after) |
Gleb Natapov | 4a99435 | 2010-07-11 15:32:23 +0300 | [diff] [blame] | 326 | kvm_fire_mask_notifiers(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index, mask_after); |
Gleb Natapov | 70f93da | 2009-07-05 18:48:12 +0300 | [diff] [blame] | 327 | if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG |
Gleb Natapov | b4a2f5e | 2009-07-05 18:48:11 +0300 | [diff] [blame] | 328 | && ioapic->irr & (1 << index)) |
Yang Zhang | aa2fbe6 | 2013-04-11 19:21:40 +0800 | [diff] [blame] | 329 | ioapic_service(ioapic, index, false); |
David Hildenbrand | ca8ab3f | 2017-04-07 10:50:32 +0200 | [diff] [blame] | 330 | kvm_make_scan_ioapic_request(ioapic->kvm); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 331 | break; |
| 332 | } |
| 333 | } |
| 334 | |
Paolo Bonzini | 0b10a1c | 2014-03-18 11:51:29 +0100 | [diff] [blame] | 335 | static int ioapic_service(struct kvm_ioapic *ioapic, int irq, bool line_status) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 336 | { |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 337 | union kvm_ioapic_redirect_entry *entry = &ioapic->redirtbl[irq]; |
| 338 | struct kvm_lapic_irq irqe; |
Yang Zhang | 2c2bf01 | 2013-04-11 19:21:41 +0800 | [diff] [blame] | 339 | int ret; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 340 | |
Nikita Leshenko | da3fe7b | 2017-11-05 15:52:30 +0200 | [diff] [blame] | 341 | if (entry->fields.mask || |
| 342 | (entry->fields.trig_mode == IOAPIC_LEVEL_TRIG && |
| 343 | entry->fields.remote_irr)) |
Paolo Bonzini | 0b10a1c | 2014-03-18 11:51:29 +0100 | [diff] [blame] | 344 | return -1; |
| 345 | |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 346 | ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x " |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 347 | "vector=%x trig_mode=%x\n", |
Liu Yuan | a38f84c | 2011-04-21 14:53:57 +0800 | [diff] [blame] | 348 | entry->fields.dest_id, entry->fields.dest_mode, |
Gleb Natapov | 58c2dde | 2009-03-05 16:35:04 +0200 | [diff] [blame] | 349 | entry->fields.delivery_mode, entry->fields.vector, |
| 350 | entry->fields.trig_mode); |
| 351 | |
| 352 | irqe.dest_id = entry->fields.dest_id; |
| 353 | irqe.vector = entry->fields.vector; |
| 354 | irqe.dest_mode = entry->fields.dest_mode; |
| 355 | irqe.trig_mode = entry->fields.trig_mode; |
| 356 | irqe.delivery_mode = entry->fields.delivery_mode << 8; |
| 357 | irqe.level = 1; |
| 358 | irqe.shorthand = 0; |
James Sullivan | 93bbf0b | 2015-03-18 19:26:03 -0600 | [diff] [blame] | 359 | irqe.msi_redir_hint = false; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 360 | |
Paolo Bonzini | 0bc830b | 2014-03-18 10:47:17 +0100 | [diff] [blame] | 361 | if (irqe.trig_mode == IOAPIC_EDGE_TRIG) |
Wincy Van | 5bda6ee | 2014-12-24 11:14:29 +0800 | [diff] [blame] | 362 | ioapic->irr_delivered |= 1 << irq; |
Paolo Bonzini | 0bc830b | 2014-03-18 10:47:17 +0100 | [diff] [blame] | 363 | |
Yang Zhang | 2c2bf01 | 2013-04-11 19:21:41 +0800 | [diff] [blame] | 364 | if (irq == RTC_GSI && line_status) { |
Paolo Bonzini | 4009b24 | 2014-03-28 20:41:51 +0100 | [diff] [blame] | 365 | /* |
| 366 | * pending_eoi cannot ever become negative (see |
| 367 | * rtc_status_pending_eoi_check_valid) and the caller |
| 368 | * ensures that it is only called if it is >= zero, namely |
| 369 | * if rtc_irq_check_coalesced returns false). |
| 370 | */ |
Yang Zhang | 2c2bf01 | 2013-04-11 19:21:41 +0800 | [diff] [blame] | 371 | BUG_ON(ioapic->rtc_status.pending_eoi != 0); |
| 372 | ret = kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe, |
Joerg Roedel | 9e4aabe | 2016-02-29 16:04:43 +0100 | [diff] [blame] | 373 | &ioapic->rtc_status.dest_map); |
Paolo Bonzini | 5678de3f | 2014-03-28 20:41:50 +0100 | [diff] [blame] | 374 | ioapic->rtc_status.pending_eoi = (ret < 0 ? 0 : ret); |
Yang Zhang | 2c2bf01 | 2013-04-11 19:21:41 +0800 | [diff] [blame] | 375 | } else |
| 376 | ret = kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe, NULL); |
| 377 | |
Paolo Bonzini | 0b10a1c | 2014-03-18 11:51:29 +0100 | [diff] [blame] | 378 | if (ret && irqe.trig_mode == IOAPIC_LEVEL_TRIG) |
| 379 | entry->fields.remote_irr = 1; |
| 380 | |
Yang Zhang | 2c2bf01 | 2013-04-11 19:21:41 +0800 | [diff] [blame] | 381 | return ret; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 382 | } |
| 383 | |
Michael S. Tsirkin | 1a577b72 | 2012-07-19 13:45:20 +0300 | [diff] [blame] | 384 | int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id, |
Yang Zhang | aa2fbe6 | 2013-04-11 19:21:40 +0800 | [diff] [blame] | 385 | int level, bool line_status) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 386 | { |
Michael S. Tsirkin | 28a6fda | 2012-08-14 19:20:28 +0300 | [diff] [blame] | 387 | int ret, irq_level; |
| 388 | |
| 389 | BUG_ON(irq < 0 || irq >= IOAPIC_NUM_PINS); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 390 | |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 391 | spin_lock(&ioapic->lock); |
Michael S. Tsirkin | 28a6fda | 2012-08-14 19:20:28 +0300 | [diff] [blame] | 392 | irq_level = __kvm_irq_line_state(&ioapic->irq_states[irq], |
| 393 | irq_source_id, level); |
Paolo Bonzini | 44847de | 2014-03-18 12:00:14 +0100 | [diff] [blame] | 394 | ret = ioapic_set_irq(ioapic, irq, irq_level, line_status); |
Yang Zhang | 2c2bf01 | 2013-04-11 19:21:41 +0800 | [diff] [blame] | 395 | |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 396 | spin_unlock(&ioapic->lock); |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 397 | |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 398 | return ret; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 399 | } |
| 400 | |
Michael S. Tsirkin | 1a577b72 | 2012-07-19 13:45:20 +0300 | [diff] [blame] | 401 | void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id) |
| 402 | { |
| 403 | int i; |
| 404 | |
| 405 | spin_lock(&ioapic->lock); |
| 406 | for (i = 0; i < KVM_IOAPIC_NUM_PINS; i++) |
| 407 | __clear_bit(irq_source_id, &ioapic->irq_states[i]); |
| 408 | spin_unlock(&ioapic->lock); |
| 409 | } |
| 410 | |
Zhang Haoyu | 184564e | 2014-09-11 16:47:04 +0800 | [diff] [blame] | 411 | static void kvm_ioapic_eoi_inject_work(struct work_struct *work) |
| 412 | { |
| 413 | int i; |
| 414 | struct kvm_ioapic *ioapic = container_of(work, struct kvm_ioapic, |
| 415 | eoi_inject.work); |
| 416 | spin_lock(&ioapic->lock); |
| 417 | for (i = 0; i < IOAPIC_NUM_PINS; i++) { |
| 418 | union kvm_ioapic_redirect_entry *ent = &ioapic->redirtbl[i]; |
| 419 | |
| 420 | if (ent->fields.trig_mode != IOAPIC_LEVEL_TRIG) |
| 421 | continue; |
| 422 | |
| 423 | if (ioapic->irr & (1 << i) && !ent->fields.remote_irr) |
| 424 | ioapic_service(ioapic, i, false); |
| 425 | } |
| 426 | spin_unlock(&ioapic->lock); |
| 427 | } |
| 428 | |
| 429 | #define IOAPIC_SUCCESSIVE_IRQ_MAX_COUNT 10000 |
| 430 | |
Yang Zhang | 1fcc789 | 2013-04-11 19:21:35 +0800 | [diff] [blame] | 431 | static void __kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, |
| 432 | struct kvm_ioapic *ioapic, int vector, int trigger_mode) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 433 | { |
Joerg Roedel | 4d99ba8 | 2016-02-29 16:04:45 +0100 | [diff] [blame] | 434 | struct dest_map *dest_map = &ioapic->rtc_status.dest_map; |
Radim Krčmář | c806a6a | 2015-03-18 19:38:22 +0100 | [diff] [blame] | 435 | struct kvm_lapic *apic = vcpu->arch.apic; |
Joerg Roedel | 4d99ba8 | 2016-02-29 16:04:45 +0100 | [diff] [blame] | 436 | int i; |
| 437 | |
| 438 | /* RTC special handling */ |
| 439 | if (test_bit(vcpu->vcpu_id, dest_map->map) && |
| 440 | vector == dest_map->vectors[vcpu->vcpu_id]) |
| 441 | rtc_irq_eoi(ioapic, vcpu); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 442 | |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 443 | for (i = 0; i < IOAPIC_NUM_PINS; i++) { |
| 444 | union kvm_ioapic_redirect_entry *ent = &ioapic->redirtbl[i]; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 445 | |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 446 | if (ent->fields.vector != vector) |
| 447 | continue; |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 448 | |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 449 | /* |
| 450 | * We are dropping lock while calling ack notifiers because ack |
| 451 | * notifier callbacks for assigned devices call into IOAPIC |
| 452 | * recursively. Since remote_irr is cleared only after call |
| 453 | * to notifiers if the same vector will be delivered while lock |
| 454 | * is dropped it will be put into irr and will be delivered |
| 455 | * after ack notifier returns. |
| 456 | */ |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 457 | spin_unlock(&ioapic->lock); |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 458 | kvm_notify_acked_irq(ioapic->kvm, KVM_IRQCHIP_IOAPIC, i); |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 459 | spin_lock(&ioapic->lock); |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 460 | |
Radim Krčmář | c806a6a | 2015-03-18 19:38:22 +0100 | [diff] [blame] | 461 | if (trigger_mode != IOAPIC_LEVEL_TRIG || |
Suravee Suthikulpanit | dfb9595 | 2016-05-04 14:09:41 -0500 | [diff] [blame] | 462 | kvm_lapic_get_reg(apic, APIC_SPIV) & APIC_SPIV_DIRECTED_EOI) |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 463 | continue; |
| 464 | |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 465 | ASSERT(ent->fields.trig_mode == IOAPIC_LEVEL_TRIG); |
| 466 | ent->fields.remote_irr = 0; |
Zhang Haoyu | 184564e | 2014-09-11 16:47:04 +0800 | [diff] [blame] | 467 | if (!ent->fields.mask && (ioapic->irr & (1 << i))) { |
| 468 | ++ioapic->irq_eoi[i]; |
| 469 | if (ioapic->irq_eoi[i] == IOAPIC_SUCCESSIVE_IRQ_MAX_COUNT) { |
| 470 | /* |
| 471 | * Real hardware does not deliver the interrupt |
| 472 | * immediately during eoi broadcast, and this |
| 473 | * lets a buggy guest make slow progress |
| 474 | * even if it does not correctly handle a |
| 475 | * level-triggered interrupt. Emulate this |
| 476 | * behavior if we detect an interrupt storm. |
| 477 | */ |
| 478 | schedule_delayed_work(&ioapic->eoi_inject, HZ / 100); |
| 479 | ioapic->irq_eoi[i] = 0; |
| 480 | trace_kvm_ioapic_delayed_eoi_inj(ent->bits); |
| 481 | } else { |
| 482 | ioapic_service(ioapic, i, false); |
| 483 | } |
| 484 | } else { |
| 485 | ioapic->irq_eoi[i] = 0; |
| 486 | } |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 487 | } |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 488 | } |
| 489 | |
Yang Zhang | 1fcc789 | 2013-04-11 19:21:35 +0800 | [diff] [blame] | 490 | void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector, int trigger_mode) |
Avi Kivity | 4fa6b9c | 2008-06-17 15:36:36 -0700 | [diff] [blame] | 491 | { |
Yang Zhang | 1fcc789 | 2013-04-11 19:21:35 +0800 | [diff] [blame] | 492 | struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic; |
Avi Kivity | 4fa6b9c | 2008-06-17 15:36:36 -0700 | [diff] [blame] | 493 | |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 494 | spin_lock(&ioapic->lock); |
Yang Zhang | 1fcc789 | 2013-04-11 19:21:35 +0800 | [diff] [blame] | 495 | __kvm_ioapic_update_eoi(vcpu, ioapic, vector, trigger_mode); |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 496 | spin_unlock(&ioapic->lock); |
Avi Kivity | 4fa6b9c | 2008-06-17 15:36:36 -0700 | [diff] [blame] | 497 | } |
| 498 | |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 499 | static inline struct kvm_ioapic *to_ioapic(struct kvm_io_device *dev) |
| 500 | { |
| 501 | return container_of(dev, struct kvm_ioapic, dev); |
| 502 | } |
| 503 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 504 | static inline int ioapic_in_range(struct kvm_ioapic *ioapic, gpa_t addr) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 505 | { |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 506 | return ((addr >= ioapic->base_address && |
| 507 | (addr < ioapic->base_address + IOAPIC_MEM_LENGTH))); |
| 508 | } |
| 509 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 510 | static int ioapic_mmio_read(struct kvm_vcpu *vcpu, struct kvm_io_device *this, |
| 511 | gpa_t addr, int len, void *val) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 512 | { |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 513 | struct kvm_ioapic *ioapic = to_ioapic(this); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 514 | u32 result; |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 515 | if (!ioapic_in_range(ioapic, addr)) |
| 516 | return -EOPNOTSUPP; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 517 | |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 518 | ioapic_debug("addr %lx\n", (unsigned long)addr); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 519 | ASSERT(!(addr & 0xf)); /* check alignment */ |
| 520 | |
| 521 | addr &= 0xff; |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 522 | spin_lock(&ioapic->lock); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 523 | switch (addr) { |
| 524 | case IOAPIC_REG_SELECT: |
| 525 | result = ioapic->ioregsel; |
| 526 | break; |
| 527 | |
| 528 | case IOAPIC_REG_WINDOW: |
| 529 | result = ioapic_read_indirect(ioapic, addr, len); |
| 530 | break; |
| 531 | |
| 532 | default: |
| 533 | result = 0; |
| 534 | break; |
| 535 | } |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 536 | spin_unlock(&ioapic->lock); |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 537 | |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 538 | switch (len) { |
| 539 | case 8: |
| 540 | *(u64 *) val = result; |
| 541 | break; |
| 542 | case 1: |
| 543 | case 2: |
| 544 | case 4: |
| 545 | memcpy(val, (char *)&result, len); |
| 546 | break; |
| 547 | default: |
| 548 | printk(KERN_WARNING "ioapic: wrong length %d\n", len); |
| 549 | } |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 550 | return 0; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 551 | } |
| 552 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 553 | static int ioapic_mmio_write(struct kvm_vcpu *vcpu, struct kvm_io_device *this, |
| 554 | gpa_t addr, int len, const void *val) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 555 | { |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 556 | struct kvm_ioapic *ioapic = to_ioapic(this); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 557 | u32 data; |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 558 | if (!ioapic_in_range(ioapic, addr)) |
| 559 | return -EOPNOTSUPP; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 560 | |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 561 | ioapic_debug("ioapic_mmio_write addr=%p len=%d val=%p\n", |
| 562 | (void*)addr, len, val); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 563 | ASSERT(!(addr & 0xf)); /* check alignment */ |
Marcelo Tosatti | 60eead7 | 2009-06-04 15:08:23 -0300 | [diff] [blame] | 564 | |
Julian Stecklina | d77fe63 | 2011-11-23 13:54:30 +0100 | [diff] [blame] | 565 | switch (len) { |
| 566 | case 8: |
| 567 | case 4: |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 568 | data = *(u32 *) val; |
Julian Stecklina | d77fe63 | 2011-11-23 13:54:30 +0100 | [diff] [blame] | 569 | break; |
| 570 | case 2: |
| 571 | data = *(u16 *) val; |
| 572 | break; |
| 573 | case 1: |
| 574 | data = *(u8 *) val; |
| 575 | break; |
| 576 | default: |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 577 | printk(KERN_WARNING "ioapic: Unsupported size %d\n", len); |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 578 | return 0; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 579 | } |
| 580 | |
| 581 | addr &= 0xff; |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 582 | spin_lock(&ioapic->lock); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 583 | switch (addr) { |
| 584 | case IOAPIC_REG_SELECT: |
Julian Stecklina | d77fe63 | 2011-11-23 13:54:30 +0100 | [diff] [blame] | 585 | ioapic->ioregsel = data & 0xFF; /* 8-bit register */ |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 586 | break; |
| 587 | |
| 588 | case IOAPIC_REG_WINDOW: |
| 589 | ioapic_write_indirect(ioapic, data); |
| 590 | break; |
| 591 | |
| 592 | default: |
| 593 | break; |
| 594 | } |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 595 | spin_unlock(&ioapic->lock); |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 596 | return 0; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 597 | } |
| 598 | |
Stephen Hemminger | 7940876 | 2013-12-29 12:12:29 -0800 | [diff] [blame] | 599 | static void kvm_ioapic_reset(struct kvm_ioapic *ioapic) |
Eddie Dong | 8c39269 | 2007-10-10 12:15:54 +0200 | [diff] [blame] | 600 | { |
| 601 | int i; |
| 602 | |
Zhang Haoyu | 184564e | 2014-09-11 16:47:04 +0800 | [diff] [blame] | 603 | cancel_delayed_work_sync(&ioapic->eoi_inject); |
Eddie Dong | 8c39269 | 2007-10-10 12:15:54 +0200 | [diff] [blame] | 604 | for (i = 0; i < IOAPIC_NUM_PINS; i++) |
| 605 | ioapic->redirtbl[i].fields.mask = 1; |
| 606 | ioapic->base_address = IOAPIC_DEFAULT_BASE_ADDRESS; |
| 607 | ioapic->ioregsel = 0; |
| 608 | ioapic->irr = 0; |
Wincy Van | 5bda6ee | 2014-12-24 11:14:29 +0800 | [diff] [blame] | 609 | ioapic->irr_delivered = 0; |
Eddie Dong | 8c39269 | 2007-10-10 12:15:54 +0200 | [diff] [blame] | 610 | ioapic->id = 0; |
Jiri Slaby | 8678654 | 2016-10-13 17:45:20 +0200 | [diff] [blame] | 611 | memset(ioapic->irq_eoi, 0x00, sizeof(ioapic->irq_eoi)); |
Yang Zhang | 1060691 | 2013-04-11 19:21:38 +0800 | [diff] [blame] | 612 | rtc_irq_eoi_tracking_reset(ioapic); |
Eddie Dong | 8c39269 | 2007-10-10 12:15:54 +0200 | [diff] [blame] | 613 | } |
| 614 | |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 615 | static const struct kvm_io_device_ops ioapic_mmio_ops = { |
| 616 | .read = ioapic_mmio_read, |
| 617 | .write = ioapic_mmio_write, |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 618 | }; |
| 619 | |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 620 | int kvm_ioapic_init(struct kvm *kvm) |
| 621 | { |
| 622 | struct kvm_ioapic *ioapic; |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 623 | int ret; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 624 | |
| 625 | ioapic = kzalloc(sizeof(struct kvm_ioapic), GFP_KERNEL); |
| 626 | if (!ioapic) |
| 627 | return -ENOMEM; |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 628 | spin_lock_init(&ioapic->lock); |
Zhang Haoyu | 184564e | 2014-09-11 16:47:04 +0800 | [diff] [blame] | 629 | INIT_DELAYED_WORK(&ioapic->eoi_inject, kvm_ioapic_eoi_inject_work); |
Zhang Xiantao | d7deeeb0 | 2007-12-14 10:17:34 +0800 | [diff] [blame] | 630 | kvm->arch.vioapic = ioapic; |
Eddie Dong | 8c39269 | 2007-10-10 12:15:54 +0200 | [diff] [blame] | 631 | kvm_ioapic_reset(ioapic); |
Gregory Haskins | d76685c | 2009-06-01 12:54:50 -0400 | [diff] [blame] | 632 | kvm_iodevice_init(&ioapic->dev, &ioapic_mmio_ops); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 633 | ioapic->kvm = kvm; |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 634 | mutex_lock(&kvm->slots_lock); |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 635 | ret = kvm_io_bus_register_dev(kvm, KVM_MMIO_BUS, ioapic->base_address, |
| 636 | IOAPIC_MEM_LENGTH, &ioapic->dev); |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 637 | mutex_unlock(&kvm->slots_lock); |
Wei Yongjun | 1ae77ba | 2010-02-09 10:31:09 +0800 | [diff] [blame] | 638 | if (ret < 0) { |
| 639 | kvm->arch.vioapic = NULL; |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 640 | kfree(ioapic); |
Wei Yongjun | 1ae77ba | 2010-02-09 10:31:09 +0800 | [diff] [blame] | 641 | } |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 642 | |
| 643 | return ret; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 644 | } |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 645 | |
Wei Yongjun | 72bb2fc | 2010-02-09 10:33:03 +0800 | [diff] [blame] | 646 | void kvm_ioapic_destroy(struct kvm *kvm) |
| 647 | { |
| 648 | struct kvm_ioapic *ioapic = kvm->arch.vioapic; |
| 649 | |
Peter Xu | 950712e | 2017-03-15 16:01:18 +0800 | [diff] [blame] | 650 | if (!ioapic) |
| 651 | return; |
| 652 | |
Zhang Haoyu | 184564e | 2014-09-11 16:47:04 +0800 | [diff] [blame] | 653 | cancel_delayed_work_sync(&ioapic->eoi_inject); |
David Hildenbrand | 49f520b | 2017-04-07 10:50:29 +0200 | [diff] [blame] | 654 | mutex_lock(&kvm->slots_lock); |
Julia Lawall | d90e3a3 | 2015-04-27 22:35:34 +0200 | [diff] [blame] | 655 | kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &ioapic->dev); |
David Hildenbrand | 49f520b | 2017-04-07 10:50:29 +0200 | [diff] [blame] | 656 | mutex_unlock(&kvm->slots_lock); |
Julia Lawall | d90e3a3 | 2015-04-27 22:35:34 +0200 | [diff] [blame] | 657 | kvm->arch.vioapic = NULL; |
| 658 | kfree(ioapic); |
Wei Yongjun | 72bb2fc | 2010-02-09 10:33:03 +0800 | [diff] [blame] | 659 | } |
| 660 | |
David Hildenbrand | 33392b4 | 2017-04-07 10:50:27 +0200 | [diff] [blame] | 661 | void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state) |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 662 | { |
David Hildenbrand | 0191e92 | 2017-04-07 10:50:24 +0200 | [diff] [blame] | 663 | struct kvm_ioapic *ioapic = kvm->arch.vioapic; |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 664 | |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 665 | spin_lock(&ioapic->lock); |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 666 | memcpy(state, ioapic, sizeof(struct kvm_ioapic_state)); |
Wincy Van | 5bda6ee | 2014-12-24 11:14:29 +0800 | [diff] [blame] | 667 | state->irr &= ~ioapic->irr_delivered; |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 668 | spin_unlock(&ioapic->lock); |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 669 | } |
| 670 | |
David Hildenbrand | 33392b4 | 2017-04-07 10:50:27 +0200 | [diff] [blame] | 671 | void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state) |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 672 | { |
David Hildenbrand | 0191e92 | 2017-04-07 10:50:24 +0200 | [diff] [blame] | 673 | struct kvm_ioapic *ioapic = kvm->arch.vioapic; |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 674 | |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 675 | spin_lock(&ioapic->lock); |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 676 | memcpy(ioapic, state, sizeof(struct kvm_ioapic_state)); |
Paolo Bonzini | 673f7b4 | 2014-03-18 11:39:23 +0100 | [diff] [blame] | 677 | ioapic->irr = 0; |
Wincy Van | 5bda6ee | 2014-12-24 11:14:29 +0800 | [diff] [blame] | 678 | ioapic->irr_delivered = 0; |
David Hildenbrand | ca8ab3f | 2017-04-07 10:50:32 +0200 | [diff] [blame] | 679 | kvm_make_scan_ioapic_request(kvm); |
Paolo Bonzini | 673f7b4 | 2014-03-18 11:39:23 +0100 | [diff] [blame] | 680 | kvm_ioapic_inject_all(ioapic, state->irr); |
Marcelo Tosatti | 46a47b1 | 2010-04-23 14:03:38 -0300 | [diff] [blame] | 681 | spin_unlock(&ioapic->lock); |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 682 | } |