Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2001 MandrakeSoft S.A. |
| 3 | * |
| 4 | * MandrakeSoft S.A. |
| 5 | * 43, rue d'Aboukir |
| 6 | * 75002 Paris - France |
| 7 | * http://www.linux-mandrake.com/ |
| 8 | * http://www.mandrakesoft.com/ |
| 9 | * |
| 10 | * This library is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU Lesser General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This library is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * Lesser General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU Lesser General Public |
| 21 | * License along with this library; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 23 | * |
| 24 | * Yunhong Jiang <yunhong.jiang@intel.com> |
| 25 | * Yaozu (Eddie) Dong <eddie.dong@intel.com> |
| 26 | * Based on Xen 3.1 code. |
| 27 | */ |
| 28 | |
Avi Kivity | edf8841 | 2007-12-16 11:02:48 +0200 | [diff] [blame] | 29 | #include <linux/kvm_host.h> |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 30 | #include <linux/kvm.h> |
| 31 | #include <linux/mm.h> |
| 32 | #include <linux/highmem.h> |
| 33 | #include <linux/smp.h> |
| 34 | #include <linux/hrtimer.h> |
| 35 | #include <linux/io.h> |
| 36 | #include <asm/processor.h> |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 37 | #include <asm/page.h> |
| 38 | #include <asm/current.h> |
Zhang Xiantao | 8247019 | 2007-12-17 13:59:56 +0800 | [diff] [blame] | 39 | |
| 40 | #include "ioapic.h" |
| 41 | #include "lapic.h" |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 42 | #include "irq.h" |
Zhang Xiantao | 8247019 | 2007-12-17 13:59:56 +0800 | [diff] [blame] | 43 | |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 44 | #if 0 |
| 45 | #define ioapic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg) |
| 46 | #else |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 47 | #define ioapic_debug(fmt, arg...) |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 48 | #endif |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 49 | static int ioapic_deliver(struct kvm_ioapic *vioapic, int irq); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 50 | |
| 51 | static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic, |
| 52 | unsigned long addr, |
| 53 | unsigned long length) |
| 54 | { |
| 55 | unsigned long result = 0; |
| 56 | |
| 57 | switch (ioapic->ioregsel) { |
| 58 | case IOAPIC_REG_VERSION: |
| 59 | result = ((((IOAPIC_NUM_PINS - 1) & 0xff) << 16) |
| 60 | | (IOAPIC_VERSION_ID & 0xff)); |
| 61 | break; |
| 62 | |
| 63 | case IOAPIC_REG_APIC_ID: |
| 64 | case IOAPIC_REG_ARB_ID: |
| 65 | result = ((ioapic->id & 0xf) << 24); |
| 66 | break; |
| 67 | |
| 68 | default: |
| 69 | { |
| 70 | u32 redir_index = (ioapic->ioregsel - 0x10) >> 1; |
| 71 | u64 redir_content; |
| 72 | |
| 73 | ASSERT(redir_index < IOAPIC_NUM_PINS); |
| 74 | |
| 75 | redir_content = ioapic->redirtbl[redir_index].bits; |
| 76 | result = (ioapic->ioregsel & 0x1) ? |
| 77 | (redir_content >> 32) & 0xffffffff : |
| 78 | redir_content & 0xffffffff; |
| 79 | break; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | return result; |
| 84 | } |
| 85 | |
| 86 | static void ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx) |
| 87 | { |
| 88 | union ioapic_redir_entry *pent; |
| 89 | |
| 90 | pent = &ioapic->redirtbl[idx]; |
| 91 | |
| 92 | if (!pent->fields.mask) { |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 93 | int injected = ioapic_deliver(ioapic, idx); |
| 94 | if (injected && pent->fields.trig_mode == IOAPIC_LEVEL_TRIG) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 95 | pent->fields.remote_irr = 1; |
| 96 | } |
| 97 | if (!pent->fields.trig_mode) |
| 98 | ioapic->irr &= ~(1 << idx); |
| 99 | } |
| 100 | |
| 101 | static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val) |
| 102 | { |
| 103 | unsigned index; |
| 104 | |
| 105 | switch (ioapic->ioregsel) { |
| 106 | case IOAPIC_REG_VERSION: |
| 107 | /* Writes are ignored. */ |
| 108 | break; |
| 109 | |
| 110 | case IOAPIC_REG_APIC_ID: |
| 111 | ioapic->id = (val >> 24) & 0xf; |
| 112 | break; |
| 113 | |
| 114 | case IOAPIC_REG_ARB_ID: |
| 115 | break; |
| 116 | |
| 117 | default: |
| 118 | index = (ioapic->ioregsel - 0x10) >> 1; |
| 119 | |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 120 | ioapic_debug("change redir index %x val %x\n", index, val); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 121 | if (index >= IOAPIC_NUM_PINS) |
| 122 | return; |
| 123 | if (ioapic->ioregsel & 1) { |
| 124 | ioapic->redirtbl[index].bits &= 0xffffffff; |
| 125 | ioapic->redirtbl[index].bits |= (u64) val << 32; |
| 126 | } else { |
| 127 | ioapic->redirtbl[index].bits &= ~0xffffffffULL; |
| 128 | ioapic->redirtbl[index].bits |= (u32) val; |
| 129 | ioapic->redirtbl[index].fields.remote_irr = 0; |
| 130 | } |
| 131 | if (ioapic->irr & (1 << index)) |
| 132 | ioapic_service(ioapic, index); |
| 133 | break; |
| 134 | } |
| 135 | } |
| 136 | |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 137 | static int ioapic_inj_irq(struct kvm_ioapic *ioapic, |
Zhang Xiantao | 8be5453 | 2007-12-02 22:35:57 +0800 | [diff] [blame] | 138 | struct kvm_vcpu *vcpu, |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 139 | u8 vector, u8 trig_mode, u8 delivery_mode) |
| 140 | { |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 141 | ioapic_debug("irq %d trig %d deliv %d\n", vector, trig_mode, |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 142 | delivery_mode); |
| 143 | |
Zhang Xiantao | 0c7ac28 | 2007-12-02 22:49:09 +0800 | [diff] [blame] | 144 | ASSERT((delivery_mode == IOAPIC_FIXED) || |
| 145 | (delivery_mode == IOAPIC_LOWEST_PRIORITY)); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 146 | |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 147 | return kvm_apic_set_irq(vcpu, vector, trig_mode); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 148 | } |
| 149 | |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 150 | static void ioapic_inj_nmi(struct kvm_vcpu *vcpu) |
| 151 | { |
| 152 | kvm_inject_nmi(vcpu); |
Jan Kiszka | 26df99c | 2008-09-26 09:30:54 +0200 | [diff] [blame] | 153 | kvm_vcpu_kick(vcpu); |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 154 | } |
| 155 | |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 156 | static u32 ioapic_get_delivery_bitmask(struct kvm_ioapic *ioapic, u8 dest, |
| 157 | u8 dest_mode) |
| 158 | { |
| 159 | u32 mask = 0; |
| 160 | int i; |
| 161 | struct kvm *kvm = ioapic->kvm; |
| 162 | struct kvm_vcpu *vcpu; |
| 163 | |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 164 | ioapic_debug("dest %d dest_mode %d\n", dest, dest_mode); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 165 | |
| 166 | if (dest_mode == 0) { /* Physical mode. */ |
| 167 | if (dest == 0xFF) { /* Broadcast. */ |
| 168 | for (i = 0; i < KVM_MAX_VCPUS; ++i) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 169 | if (kvm->vcpus[i] && kvm->vcpus[i]->arch.apic) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 170 | mask |= 1 << i; |
| 171 | return mask; |
| 172 | } |
| 173 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
| 174 | vcpu = kvm->vcpus[i]; |
| 175 | if (!vcpu) |
| 176 | continue; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 177 | if (kvm_apic_match_physical_addr(vcpu->arch.apic, dest)) { |
| 178 | if (vcpu->arch.apic) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 179 | mask = 1 << i; |
| 180 | break; |
| 181 | } |
| 182 | } |
| 183 | } else if (dest != 0) /* Logical mode, MDA non-zero. */ |
| 184 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
| 185 | vcpu = kvm->vcpus[i]; |
| 186 | if (!vcpu) |
| 187 | continue; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 188 | if (vcpu->arch.apic && |
| 189 | kvm_apic_match_logical_addr(vcpu->arch.apic, dest)) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 190 | mask |= 1 << vcpu->vcpu_id; |
| 191 | } |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 192 | ioapic_debug("mask %x\n", mask); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 193 | return mask; |
| 194 | } |
| 195 | |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 196 | static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 197 | { |
| 198 | u8 dest = ioapic->redirtbl[irq].fields.dest_id; |
| 199 | u8 dest_mode = ioapic->redirtbl[irq].fields.dest_mode; |
| 200 | u8 delivery_mode = ioapic->redirtbl[irq].fields.delivery_mode; |
| 201 | u8 vector = ioapic->redirtbl[irq].fields.vector; |
| 202 | u8 trig_mode = ioapic->redirtbl[irq].fields.trig_mode; |
| 203 | u32 deliver_bitmask; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 204 | struct kvm_vcpu *vcpu; |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 205 | int vcpu_id, r = 0; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 206 | |
| 207 | ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x " |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 208 | "vector=%x trig_mode=%x\n", |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 209 | dest, dest_mode, delivery_mode, vector, trig_mode); |
| 210 | |
| 211 | deliver_bitmask = ioapic_get_delivery_bitmask(ioapic, dest, dest_mode); |
| 212 | if (!deliver_bitmask) { |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 213 | ioapic_debug("no target on destination\n"); |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 214 | return 0; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | switch (delivery_mode) { |
Zhang Xiantao | 0c7ac28 | 2007-12-02 22:49:09 +0800 | [diff] [blame] | 218 | case IOAPIC_LOWEST_PRIORITY: |
Zhang Xiantao | 8be5453 | 2007-12-02 22:35:57 +0800 | [diff] [blame] | 219 | vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm, vector, |
| 220 | deliver_bitmask); |
Avi Kivity | 8c35f23 | 2008-02-25 10:28:31 +0200 | [diff] [blame] | 221 | #ifdef CONFIG_X86 |
| 222 | if (irq == 0) |
| 223 | vcpu = ioapic->kvm->vcpus[0]; |
| 224 | #endif |
Zhang Xiantao | 8be5453 | 2007-12-02 22:35:57 +0800 | [diff] [blame] | 225 | if (vcpu != NULL) |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 226 | r = ioapic_inj_irq(ioapic, vcpu, vector, |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 227 | trig_mode, delivery_mode); |
| 228 | else |
Zhang Xiantao | 8be5453 | 2007-12-02 22:35:57 +0800 | [diff] [blame] | 229 | ioapic_debug("null lowest prio vcpu: " |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 230 | "mask=%x vector=%x delivery_mode=%x\n", |
Zhang Xiantao | 0c7ac28 | 2007-12-02 22:49:09 +0800 | [diff] [blame] | 231 | deliver_bitmask, vector, IOAPIC_LOWEST_PRIORITY); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 232 | break; |
Zhang Xiantao | 0c7ac28 | 2007-12-02 22:49:09 +0800 | [diff] [blame] | 233 | case IOAPIC_FIXED: |
Avi Kivity | 8c35f23 | 2008-02-25 10:28:31 +0200 | [diff] [blame] | 234 | #ifdef CONFIG_X86 |
| 235 | if (irq == 0) |
| 236 | deliver_bitmask = 1; |
| 237 | #endif |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 238 | for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) { |
| 239 | if (!(deliver_bitmask & (1 << vcpu_id))) |
| 240 | continue; |
| 241 | deliver_bitmask &= ~(1 << vcpu_id); |
| 242 | vcpu = ioapic->kvm->vcpus[vcpu_id]; |
| 243 | if (vcpu) { |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 244 | r = ioapic_inj_irq(ioapic, vcpu, vector, |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 245 | trig_mode, delivery_mode); |
| 246 | } |
| 247 | } |
| 248 | break; |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 249 | case IOAPIC_NMI: |
| 250 | for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) { |
| 251 | if (!(deliver_bitmask & (1 << vcpu_id))) |
| 252 | continue; |
| 253 | deliver_bitmask &= ~(1 << vcpu_id); |
| 254 | vcpu = ioapic->kvm->vcpus[vcpu_id]; |
| 255 | if (vcpu) |
| 256 | ioapic_inj_nmi(vcpu); |
| 257 | else |
| 258 | ioapic_debug("NMI to vcpu %d failed\n", |
| 259 | vcpu->vcpu_id); |
| 260 | } |
| 261 | break; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 262 | default: |
| 263 | printk(KERN_WARNING "Unsupported delivery mode %d\n", |
| 264 | delivery_mode); |
| 265 | break; |
| 266 | } |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 267 | return r; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level) |
| 271 | { |
| 272 | u32 old_irr = ioapic->irr; |
| 273 | u32 mask = 1 << irq; |
| 274 | union ioapic_redir_entry entry; |
| 275 | |
| 276 | if (irq >= 0 && irq < IOAPIC_NUM_PINS) { |
| 277 | entry = ioapic->redirtbl[irq]; |
| 278 | level ^= entry.fields.polarity; |
| 279 | if (!level) |
| 280 | ioapic->irr &= ~mask; |
| 281 | else { |
| 282 | ioapic->irr |= mask; |
| 283 | if ((!entry.fields.trig_mode && old_irr != ioapic->irr) |
| 284 | || !entry.fields.remote_irr) |
| 285 | ioapic_service(ioapic, irq); |
| 286 | } |
| 287 | } |
| 288 | } |
| 289 | |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 290 | static void __kvm_ioapic_update_eoi(struct kvm_ioapic *ioapic, int gsi, |
| 291 | int trigger_mode) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 292 | { |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 293 | union ioapic_redir_entry *ent; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 294 | |
| 295 | ent = &ioapic->redirtbl[gsi]; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 296 | |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 297 | kvm_notify_acked_irq(ioapic->kvm, gsi); |
| 298 | |
| 299 | if (trigger_mode == IOAPIC_LEVEL_TRIG) { |
| 300 | ASSERT(ent->fields.trig_mode == IOAPIC_LEVEL_TRIG); |
| 301 | ent->fields.remote_irr = 0; |
| 302 | if (!ent->fields.mask && (ioapic->irr & (1 << gsi))) |
| 303 | ioapic_service(ioapic, gsi); |
| 304 | } |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 305 | } |
| 306 | |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 307 | void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode) |
Avi Kivity | 4fa6b9c | 2008-06-17 15:36:36 -0700 | [diff] [blame] | 308 | { |
| 309 | struct kvm_ioapic *ioapic = kvm->arch.vioapic; |
| 310 | int i; |
| 311 | |
| 312 | for (i = 0; i < IOAPIC_NUM_PINS; i++) |
| 313 | if (ioapic->redirtbl[i].fields.vector == vector) |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 314 | __kvm_ioapic_update_eoi(ioapic, i, trigger_mode); |
Avi Kivity | 4fa6b9c | 2008-06-17 15:36:36 -0700 | [diff] [blame] | 315 | } |
| 316 | |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 317 | static int ioapic_in_range(struct kvm_io_device *this, gpa_t addr, |
| 318 | int len, int is_write) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 319 | { |
| 320 | struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private; |
| 321 | |
| 322 | return ((addr >= ioapic->base_address && |
| 323 | (addr < ioapic->base_address + IOAPIC_MEM_LENGTH))); |
| 324 | } |
| 325 | |
| 326 | static void ioapic_mmio_read(struct kvm_io_device *this, gpa_t addr, int len, |
| 327 | void *val) |
| 328 | { |
| 329 | struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private; |
| 330 | u32 result; |
| 331 | |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 332 | ioapic_debug("addr %lx\n", (unsigned long)addr); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 333 | ASSERT(!(addr & 0xf)); /* check alignment */ |
| 334 | |
| 335 | addr &= 0xff; |
| 336 | switch (addr) { |
| 337 | case IOAPIC_REG_SELECT: |
| 338 | result = ioapic->ioregsel; |
| 339 | break; |
| 340 | |
| 341 | case IOAPIC_REG_WINDOW: |
| 342 | result = ioapic_read_indirect(ioapic, addr, len); |
| 343 | break; |
| 344 | |
| 345 | default: |
| 346 | result = 0; |
| 347 | break; |
| 348 | } |
| 349 | switch (len) { |
| 350 | case 8: |
| 351 | *(u64 *) val = result; |
| 352 | break; |
| 353 | case 1: |
| 354 | case 2: |
| 355 | case 4: |
| 356 | memcpy(val, (char *)&result, len); |
| 357 | break; |
| 358 | default: |
| 359 | printk(KERN_WARNING "ioapic: wrong length %d\n", len); |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | static void ioapic_mmio_write(struct kvm_io_device *this, gpa_t addr, int len, |
| 364 | const void *val) |
| 365 | { |
| 366 | struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private; |
| 367 | u32 data; |
| 368 | |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 369 | ioapic_debug("ioapic_mmio_write addr=%p len=%d val=%p\n", |
| 370 | (void*)addr, len, val); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 371 | ASSERT(!(addr & 0xf)); /* check alignment */ |
| 372 | if (len == 4 || len == 8) |
| 373 | data = *(u32 *) val; |
| 374 | else { |
| 375 | printk(KERN_WARNING "ioapic: Unsupported size %d\n", len); |
| 376 | return; |
| 377 | } |
| 378 | |
| 379 | addr &= 0xff; |
| 380 | switch (addr) { |
| 381 | case IOAPIC_REG_SELECT: |
| 382 | ioapic->ioregsel = data; |
| 383 | break; |
| 384 | |
| 385 | case IOAPIC_REG_WINDOW: |
| 386 | ioapic_write_indirect(ioapic, data); |
| 387 | break; |
Zhang Xiantao | b1fd3d3 | 2007-12-02 22:53:07 +0800 | [diff] [blame] | 388 | #ifdef CONFIG_IA64 |
| 389 | case IOAPIC_REG_EOI: |
Xiantao Zhang | 26815a6 | 2008-08-19 20:48:03 +0800 | [diff] [blame] | 390 | kvm_ioapic_update_eoi(ioapic->kvm, data, IOAPIC_LEVEL_TRIG); |
Zhang Xiantao | b1fd3d3 | 2007-12-02 22:53:07 +0800 | [diff] [blame] | 391 | break; |
| 392 | #endif |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 393 | |
| 394 | default: |
| 395 | break; |
| 396 | } |
| 397 | } |
| 398 | |
Eddie Dong | 8c39269 | 2007-10-10 12:15:54 +0200 | [diff] [blame] | 399 | void kvm_ioapic_reset(struct kvm_ioapic *ioapic) |
| 400 | { |
| 401 | int i; |
| 402 | |
| 403 | for (i = 0; i < IOAPIC_NUM_PINS; i++) |
| 404 | ioapic->redirtbl[i].fields.mask = 1; |
| 405 | ioapic->base_address = IOAPIC_DEFAULT_BASE_ADDRESS; |
| 406 | ioapic->ioregsel = 0; |
| 407 | ioapic->irr = 0; |
| 408 | ioapic->id = 0; |
| 409 | } |
| 410 | |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 411 | int kvm_ioapic_init(struct kvm *kvm) |
| 412 | { |
| 413 | struct kvm_ioapic *ioapic; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 414 | |
| 415 | ioapic = kzalloc(sizeof(struct kvm_ioapic), GFP_KERNEL); |
| 416 | if (!ioapic) |
| 417 | return -ENOMEM; |
Zhang Xiantao | d7deeeb0 | 2007-12-14 10:17:34 +0800 | [diff] [blame] | 418 | kvm->arch.vioapic = ioapic; |
Eddie Dong | 8c39269 | 2007-10-10 12:15:54 +0200 | [diff] [blame] | 419 | kvm_ioapic_reset(ioapic); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 420 | ioapic->dev.read = ioapic_mmio_read; |
| 421 | ioapic->dev.write = ioapic_mmio_write; |
| 422 | ioapic->dev.in_range = ioapic_in_range; |
| 423 | ioapic->dev.private = ioapic; |
| 424 | ioapic->kvm = kvm; |
| 425 | kvm_io_bus_register_dev(&kvm->mmio_bus, &ioapic->dev); |
| 426 | return 0; |
| 427 | } |