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 | |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 86 | static int ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 87 | { |
Sheng Yang | cf9e4e1 | 2009-02-11 16:03:36 +0800 | [diff] [blame] | 88 | union kvm_ioapic_redirect_entry *pent; |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 89 | int injected = -1; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 90 | |
| 91 | pent = &ioapic->redirtbl[idx]; |
| 92 | |
| 93 | if (!pent->fields.mask) { |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 94 | injected = ioapic_deliver(ioapic, idx); |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 95 | if (injected && pent->fields.trig_mode == IOAPIC_LEVEL_TRIG) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 96 | pent->fields.remote_irr = 1; |
| 97 | } |
| 98 | if (!pent->fields.trig_mode) |
| 99 | ioapic->irr &= ~(1 << idx); |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 100 | |
| 101 | return injected; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val) |
| 105 | { |
| 106 | unsigned index; |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 107 | bool mask_before, mask_after; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 108 | |
| 109 | switch (ioapic->ioregsel) { |
| 110 | case IOAPIC_REG_VERSION: |
| 111 | /* Writes are ignored. */ |
| 112 | break; |
| 113 | |
| 114 | case IOAPIC_REG_APIC_ID: |
| 115 | ioapic->id = (val >> 24) & 0xf; |
| 116 | break; |
| 117 | |
| 118 | case IOAPIC_REG_ARB_ID: |
| 119 | break; |
| 120 | |
| 121 | default: |
| 122 | index = (ioapic->ioregsel - 0x10) >> 1; |
| 123 | |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 124 | ioapic_debug("change redir index %x val %x\n", index, val); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 125 | if (index >= IOAPIC_NUM_PINS) |
| 126 | return; |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 127 | mask_before = ioapic->redirtbl[index].fields.mask; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 128 | if (ioapic->ioregsel & 1) { |
| 129 | ioapic->redirtbl[index].bits &= 0xffffffff; |
| 130 | ioapic->redirtbl[index].bits |= (u64) val << 32; |
| 131 | } else { |
| 132 | ioapic->redirtbl[index].bits &= ~0xffffffffULL; |
| 133 | ioapic->redirtbl[index].bits |= (u32) val; |
| 134 | ioapic->redirtbl[index].fields.remote_irr = 0; |
| 135 | } |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 136 | mask_after = ioapic->redirtbl[index].fields.mask; |
| 137 | if (mask_before != mask_after) |
| 138 | kvm_fire_mask_notifiers(ioapic->kvm, index, mask_after); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 139 | if (ioapic->irr & (1 << index)) |
| 140 | ioapic_service(ioapic, index); |
| 141 | break; |
| 142 | } |
| 143 | } |
| 144 | |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 145 | static int ioapic_inj_irq(struct kvm_ioapic *ioapic, |
Zhang Xiantao | 8be5453 | 2007-12-02 22:35:57 +0800 | [diff] [blame] | 146 | struct kvm_vcpu *vcpu, |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 147 | u8 vector, u8 trig_mode, u8 delivery_mode) |
| 148 | { |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 149 | ioapic_debug("irq %d trig %d deliv %d\n", vector, trig_mode, |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 150 | delivery_mode); |
| 151 | |
Zhang Xiantao | 0c7ac28 | 2007-12-02 22:49:09 +0800 | [diff] [blame] | 152 | ASSERT((delivery_mode == IOAPIC_FIXED) || |
| 153 | (delivery_mode == IOAPIC_LOWEST_PRIORITY)); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 154 | |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 155 | return kvm_apic_set_irq(vcpu, vector, trig_mode); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 156 | } |
| 157 | |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 158 | static void ioapic_inj_nmi(struct kvm_vcpu *vcpu) |
| 159 | { |
| 160 | kvm_inject_nmi(vcpu); |
Jan Kiszka | 26df99c | 2008-09-26 09:30:54 +0200 | [diff] [blame] | 161 | kvm_vcpu_kick(vcpu); |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 162 | } |
| 163 | |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 164 | static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 165 | { |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 166 | union kvm_ioapic_redirect_entry entry = ioapic->redirtbl[irq]; |
Sheng Yang | bfd349d | 2009-02-11 16:03:40 +0800 | [diff] [blame] | 167 | DECLARE_BITMAP(deliver_bitmask, KVM_MAX_VCPUS); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 168 | struct kvm_vcpu *vcpu; |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 169 | int vcpu_id, r = -1; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 170 | |
| 171 | ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x " |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 172 | "vector=%x trig_mode=%x\n", |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 173 | entry.fields.dest, entry.fields.dest_mode, |
| 174 | entry.fields.delivery_mode, entry.fields.vector, |
| 175 | entry.fields.trig_mode); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 176 | |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 177 | /* Always delivery PIT interrupt to vcpu 0 */ |
Avi Kivity | 8c35f23 | 2008-02-25 10:28:31 +0200 | [diff] [blame] | 178 | #ifdef CONFIG_X86 |
Sheng Yang | 74a3a8f | 2009-03-04 13:33:02 +0800 | [diff] [blame^] | 179 | if (irq == 0) { |
| 180 | bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS); |
Sheng Yang | bfd349d | 2009-02-11 16:03:40 +0800 | [diff] [blame] | 181 | __set_bit(0, deliver_bitmask); |
Sheng Yang | 74a3a8f | 2009-03-04 13:33:02 +0800 | [diff] [blame^] | 182 | } else |
Avi Kivity | 8c35f23 | 2008-02-25 10:28:31 +0200 | [diff] [blame] | 183 | #endif |
Sheng Yang | bfd349d | 2009-02-11 16:03:40 +0800 | [diff] [blame] | 184 | kvm_get_intr_delivery_bitmask(ioapic, &entry, deliver_bitmask); |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 185 | |
Sheng Yang | bfd349d | 2009-02-11 16:03:40 +0800 | [diff] [blame] | 186 | if (find_first_bit(deliver_bitmask, KVM_MAX_VCPUS) >= KVM_MAX_VCPUS) { |
| 187 | ioapic_debug("no target on destination\n"); |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | while ((vcpu_id = find_first_bit(deliver_bitmask, KVM_MAX_VCPUS)) |
| 192 | < KVM_MAX_VCPUS) { |
| 193 | __clear_bit(vcpu_id, deliver_bitmask); |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 194 | vcpu = ioapic->kvm->vcpus[vcpu_id]; |
| 195 | if (vcpu) { |
| 196 | if (entry.fields.delivery_mode == |
| 197 | IOAPIC_LOWEST_PRIORITY || |
| 198 | entry.fields.delivery_mode == IOAPIC_FIXED) { |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 199 | if (r < 0) |
| 200 | r = 0; |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 201 | r += ioapic_inj_irq(ioapic, vcpu, |
| 202 | entry.fields.vector, |
| 203 | entry.fields.trig_mode, |
| 204 | entry.fields.delivery_mode); |
| 205 | } else if (entry.fields.delivery_mode == IOAPIC_NMI) { |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 206 | r = 1; |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 207 | ioapic_inj_nmi(vcpu); |
| 208 | } else |
| 209 | ioapic_debug("unsupported delivery mode %x!\n", |
| 210 | entry.fields.delivery_mode); |
| 211 | } else |
| 212 | ioapic_debug("null destination vcpu: " |
| 213 | "mask=%x vector=%x delivery_mode=%x\n", |
| 214 | entry.fields.deliver_bitmask, |
| 215 | entry.fields.vector, |
| 216 | entry.fields.delivery_mode); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 217 | } |
Marcelo Tosatti | ff4b9df | 2008-06-05 00:08:11 -0300 | [diff] [blame] | 218 | return r; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 219 | } |
| 220 | |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 221 | int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 222 | { |
| 223 | u32 old_irr = ioapic->irr; |
| 224 | u32 mask = 1 << irq; |
Sheng Yang | cf9e4e1 | 2009-02-11 16:03:36 +0800 | [diff] [blame] | 225 | union kvm_ioapic_redirect_entry entry; |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 226 | int ret = 1; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 227 | |
| 228 | if (irq >= 0 && irq < IOAPIC_NUM_PINS) { |
| 229 | entry = ioapic->redirtbl[irq]; |
| 230 | level ^= entry.fields.polarity; |
| 231 | if (!level) |
| 232 | ioapic->irr &= ~mask; |
| 233 | else { |
| 234 | ioapic->irr |= mask; |
| 235 | if ((!entry.fields.trig_mode && old_irr != ioapic->irr) |
| 236 | || !entry.fields.remote_irr) |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 237 | ret = ioapic_service(ioapic, irq); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 238 | } |
| 239 | } |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 240 | return ret; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 241 | } |
| 242 | |
Marcelo Tosatti | 44882ee | 2009-01-27 15:12:38 -0200 | [diff] [blame] | 243 | static void __kvm_ioapic_update_eoi(struct kvm_ioapic *ioapic, int pin, |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 244 | int trigger_mode) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 245 | { |
Sheng Yang | cf9e4e1 | 2009-02-11 16:03:36 +0800 | [diff] [blame] | 246 | union kvm_ioapic_redirect_entry *ent; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 247 | |
Marcelo Tosatti | 44882ee | 2009-01-27 15:12:38 -0200 | [diff] [blame] | 248 | ent = &ioapic->redirtbl[pin]; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 249 | |
Marcelo Tosatti | 44882ee | 2009-01-27 15:12:38 -0200 | [diff] [blame] | 250 | kvm_notify_acked_irq(ioapic->kvm, KVM_IRQCHIP_IOAPIC, pin); |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 251 | |
| 252 | if (trigger_mode == IOAPIC_LEVEL_TRIG) { |
| 253 | ASSERT(ent->fields.trig_mode == IOAPIC_LEVEL_TRIG); |
| 254 | ent->fields.remote_irr = 0; |
Marcelo Tosatti | 44882ee | 2009-01-27 15:12:38 -0200 | [diff] [blame] | 255 | if (!ent->fields.mask && (ioapic->irr & (1 << pin))) |
| 256 | ioapic_service(ioapic, pin); |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 257 | } |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 258 | } |
| 259 | |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 260 | 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] | 261 | { |
| 262 | struct kvm_ioapic *ioapic = kvm->arch.vioapic; |
| 263 | int i; |
| 264 | |
| 265 | for (i = 0; i < IOAPIC_NUM_PINS; i++) |
| 266 | if (ioapic->redirtbl[i].fields.vector == vector) |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 267 | __kvm_ioapic_update_eoi(ioapic, i, trigger_mode); |
Avi Kivity | 4fa6b9c | 2008-06-17 15:36:36 -0700 | [diff] [blame] | 268 | } |
| 269 | |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 270 | static int ioapic_in_range(struct kvm_io_device *this, gpa_t addr, |
| 271 | int len, int is_write) |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 272 | { |
| 273 | struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private; |
| 274 | |
| 275 | return ((addr >= ioapic->base_address && |
| 276 | (addr < ioapic->base_address + IOAPIC_MEM_LENGTH))); |
| 277 | } |
| 278 | |
| 279 | static void ioapic_mmio_read(struct kvm_io_device *this, gpa_t addr, int len, |
| 280 | void *val) |
| 281 | { |
| 282 | struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private; |
| 283 | u32 result; |
| 284 | |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 285 | ioapic_debug("addr %lx\n", (unsigned long)addr); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 286 | ASSERT(!(addr & 0xf)); /* check alignment */ |
| 287 | |
| 288 | addr &= 0xff; |
| 289 | switch (addr) { |
| 290 | case IOAPIC_REG_SELECT: |
| 291 | result = ioapic->ioregsel; |
| 292 | break; |
| 293 | |
| 294 | case IOAPIC_REG_WINDOW: |
| 295 | result = ioapic_read_indirect(ioapic, addr, len); |
| 296 | break; |
| 297 | |
| 298 | default: |
| 299 | result = 0; |
| 300 | break; |
| 301 | } |
| 302 | switch (len) { |
| 303 | case 8: |
| 304 | *(u64 *) val = result; |
| 305 | break; |
| 306 | case 1: |
| 307 | case 2: |
| 308 | case 4: |
| 309 | memcpy(val, (char *)&result, len); |
| 310 | break; |
| 311 | default: |
| 312 | printk(KERN_WARNING "ioapic: wrong length %d\n", len); |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | static void ioapic_mmio_write(struct kvm_io_device *this, gpa_t addr, int len, |
| 317 | const void *val) |
| 318 | { |
| 319 | struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private; |
| 320 | u32 data; |
| 321 | |
Laurent Vivier | e25e3ed | 2007-10-12 11:01:59 +0200 | [diff] [blame] | 322 | ioapic_debug("ioapic_mmio_write addr=%p len=%d val=%p\n", |
| 323 | (void*)addr, len, val); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 324 | ASSERT(!(addr & 0xf)); /* check alignment */ |
| 325 | if (len == 4 || len == 8) |
| 326 | data = *(u32 *) val; |
| 327 | else { |
| 328 | printk(KERN_WARNING "ioapic: Unsupported size %d\n", len); |
| 329 | return; |
| 330 | } |
| 331 | |
| 332 | addr &= 0xff; |
| 333 | switch (addr) { |
| 334 | case IOAPIC_REG_SELECT: |
| 335 | ioapic->ioregsel = data; |
| 336 | break; |
| 337 | |
| 338 | case IOAPIC_REG_WINDOW: |
| 339 | ioapic_write_indirect(ioapic, data); |
| 340 | break; |
Zhang Xiantao | b1fd3d3 | 2007-12-02 22:53:07 +0800 | [diff] [blame] | 341 | #ifdef CONFIG_IA64 |
| 342 | case IOAPIC_REG_EOI: |
Xiantao Zhang | 26815a6 | 2008-08-19 20:48:03 +0800 | [diff] [blame] | 343 | kvm_ioapic_update_eoi(ioapic->kvm, data, IOAPIC_LEVEL_TRIG); |
Zhang Xiantao | b1fd3d3 | 2007-12-02 22:53:07 +0800 | [diff] [blame] | 344 | break; |
| 345 | #endif |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 346 | |
| 347 | default: |
| 348 | break; |
| 349 | } |
| 350 | } |
| 351 | |
Eddie Dong | 8c39269 | 2007-10-10 12:15:54 +0200 | [diff] [blame] | 352 | void kvm_ioapic_reset(struct kvm_ioapic *ioapic) |
| 353 | { |
| 354 | int i; |
| 355 | |
| 356 | for (i = 0; i < IOAPIC_NUM_PINS; i++) |
| 357 | ioapic->redirtbl[i].fields.mask = 1; |
| 358 | ioapic->base_address = IOAPIC_DEFAULT_BASE_ADDRESS; |
| 359 | ioapic->ioregsel = 0; |
| 360 | ioapic->irr = 0; |
| 361 | ioapic->id = 0; |
| 362 | } |
| 363 | |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 364 | int kvm_ioapic_init(struct kvm *kvm) |
| 365 | { |
| 366 | struct kvm_ioapic *ioapic; |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 367 | |
| 368 | ioapic = kzalloc(sizeof(struct kvm_ioapic), GFP_KERNEL); |
| 369 | if (!ioapic) |
| 370 | return -ENOMEM; |
Zhang Xiantao | d7deeeb | 2007-12-14 10:17:34 +0800 | [diff] [blame] | 371 | kvm->arch.vioapic = ioapic; |
Eddie Dong | 8c39269 | 2007-10-10 12:15:54 +0200 | [diff] [blame] | 372 | kvm_ioapic_reset(ioapic); |
Eddie Dong | 1fd4f2a | 2007-07-18 12:03:39 +0300 | [diff] [blame] | 373 | ioapic->dev.read = ioapic_mmio_read; |
| 374 | ioapic->dev.write = ioapic_mmio_write; |
| 375 | ioapic->dev.in_range = ioapic_in_range; |
| 376 | ioapic->dev.private = ioapic; |
| 377 | ioapic->kvm = kvm; |
| 378 | kvm_io_bus_register_dev(&kvm->mmio_bus, &ioapic->dev); |
| 379 | return 0; |
| 380 | } |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 381 | |