Xiantao Zhang | 3de42dc | 2008-10-06 13:48:45 +0800 | [diff] [blame] | 1 | /* |
| 2 | * irq_comm.c: Common API for in kernel interrupt controller |
| 3 | * Copyright (c) 2007, Intel Corporation. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms and conditions of the GNU General Public License, |
| 7 | * version 2, as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along with |
| 15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 16 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
| 17 | * Authors: |
| 18 | * Yaozu (Eddie) Dong <Eddie.dong@intel.com> |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include <linux/kvm_host.h> |
Sheng Yang | 79950e1 | 2009-02-10 13:57:06 +0800 | [diff] [blame] | 23 | |
Sheng Yang | 79950e1 | 2009-02-10 13:57:06 +0800 | [diff] [blame] | 24 | #include <asm/msidef.h> |
Sheng Yang | 79950e1 | 2009-02-10 13:57:06 +0800 | [diff] [blame] | 25 | |
Xiantao Zhang | 3de42dc | 2008-10-06 13:48:45 +0800 | [diff] [blame] | 26 | #include "irq.h" |
| 27 | |
| 28 | #include "ioapic.h" |
| 29 | |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 30 | static int kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e, |
| 31 | struct kvm *kvm, int level) |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 32 | { |
| 33 | #ifdef CONFIG_X86 |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 34 | return kvm_pic_set_irq(pic_irqchip(kvm), e->irqchip.pin, level); |
| 35 | #else |
| 36 | return -1; |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 37 | #endif |
| 38 | } |
| 39 | |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 40 | static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e, |
| 41 | struct kvm *kvm, int level) |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 42 | { |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 43 | return kvm_ioapic_set_irq(kvm->arch.vioapic, e->irqchip.pin, level); |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 44 | } |
| 45 | |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 46 | void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic, |
| 47 | union kvm_ioapic_redirect_entry *entry, |
| 48 | unsigned long *deliver_bitmask) |
| 49 | { |
Sheng Yang | 74a3a8f | 2009-03-04 13:33:02 +0800 | [diff] [blame^] | 50 | int i; |
| 51 | struct kvm *kvm = ioapic->kvm; |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 52 | struct kvm_vcpu *vcpu; |
| 53 | |
Sheng Yang | 74a3a8f | 2009-03-04 13:33:02 +0800 | [diff] [blame^] | 54 | bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS); |
| 55 | |
| 56 | if (entry->fields.dest_mode == 0) { /* Physical mode. */ |
| 57 | if (entry->fields.dest_id == 0xFF) { /* Broadcast. */ |
| 58 | for (i = 0; i < KVM_MAX_VCPUS; ++i) |
| 59 | if (kvm->vcpus[i] && kvm->vcpus[i]->arch.apic) |
| 60 | __set_bit(i, deliver_bitmask); |
| 61 | /* Lowest priority shouldn't combine with broadcast */ |
| 62 | if (entry->fields.delivery_mode == |
| 63 | IOAPIC_LOWEST_PRIORITY && printk_ratelimit()) |
| 64 | printk(KERN_INFO "kvm: apic: phys broadcast " |
| 65 | "and lowest prio\n"); |
| 66 | return; |
| 67 | } |
| 68 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
| 69 | vcpu = kvm->vcpus[i]; |
| 70 | if (!vcpu) |
| 71 | continue; |
| 72 | if (kvm_apic_match_physical_addr(vcpu->arch.apic, |
| 73 | entry->fields.dest_id)) { |
| 74 | if (vcpu->arch.apic) |
| 75 | __set_bit(i, deliver_bitmask); |
| 76 | break; |
| 77 | } |
| 78 | } |
| 79 | } else if (entry->fields.dest_id != 0) /* Logical mode, MDA non-zero. */ |
| 80 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
| 81 | vcpu = kvm->vcpus[i]; |
| 82 | if (!vcpu) |
| 83 | continue; |
| 84 | if (vcpu->arch.apic && |
| 85 | kvm_apic_match_logical_addr(vcpu->arch.apic, |
| 86 | entry->fields.dest_id)) |
| 87 | __set_bit(i, deliver_bitmask); |
| 88 | } |
| 89 | |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 90 | switch (entry->fields.delivery_mode) { |
| 91 | case IOAPIC_LOWEST_PRIORITY: |
Sheng Yang | 74a3a8f | 2009-03-04 13:33:02 +0800 | [diff] [blame^] | 92 | /* Select one in deliver_bitmask */ |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 93 | vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm, |
Sheng Yang | 110c2fa | 2009-02-11 16:03:39 +0800 | [diff] [blame] | 94 | entry->fields.vector, deliver_bitmask); |
Sheng Yang | 74a3a8f | 2009-03-04 13:33:02 +0800 | [diff] [blame^] | 95 | bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS); |
| 96 | if (!vcpu) |
| 97 | return; |
Sheng Yang | bfd349d | 2009-02-11 16:03:40 +0800 | [diff] [blame] | 98 | __set_bit(vcpu->vcpu_id, deliver_bitmask); |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 99 | break; |
| 100 | case IOAPIC_FIXED: |
| 101 | case IOAPIC_NMI: |
| 102 | break; |
| 103 | default: |
| 104 | if (printk_ratelimit()) |
| 105 | printk(KERN_INFO "kvm: unsupported delivery mode %d\n", |
| 106 | entry->fields.delivery_mode); |
Sheng Yang | 74a3a8f | 2009-03-04 13:33:02 +0800 | [diff] [blame^] | 107 | bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS); |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 108 | } |
| 109 | } |
| 110 | |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 111 | static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, |
| 112 | struct kvm *kvm, int level) |
Sheng Yang | 79950e1 | 2009-02-10 13:57:06 +0800 | [diff] [blame] | 113 | { |
Gleb Natapov | 71450f7 | 2009-02-23 12:57:11 +0200 | [diff] [blame] | 114 | int vcpu_id, r = -1; |
Sheng Yang | 79950e1 | 2009-02-10 13:57:06 +0800 | [diff] [blame] | 115 | struct kvm_vcpu *vcpu; |
| 116 | struct kvm_ioapic *ioapic = ioapic_irqchip(kvm); |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 117 | union kvm_ioapic_redirect_entry entry; |
Sheng Yang | bfd349d | 2009-02-11 16:03:40 +0800 | [diff] [blame] | 118 | DECLARE_BITMAP(deliver_bitmask, KVM_MAX_VCPUS); |
Sheng Yang | 79950e1 | 2009-02-10 13:57:06 +0800 | [diff] [blame] | 119 | |
| 120 | BUG_ON(!ioapic); |
| 121 | |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 122 | entry.bits = 0; |
| 123 | entry.fields.dest_id = (e->msi.address_lo & |
| 124 | MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT; |
| 125 | entry.fields.vector = (e->msi.data & |
| 126 | MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT; |
| 127 | entry.fields.dest_mode = test_bit(MSI_ADDR_DEST_MODE_SHIFT, |
| 128 | (unsigned long *)&e->msi.address_lo); |
| 129 | entry.fields.trig_mode = test_bit(MSI_DATA_TRIGGER_SHIFT, |
| 130 | (unsigned long *)&e->msi.data); |
| 131 | entry.fields.delivery_mode = test_bit( |
| 132 | MSI_DATA_DELIVERY_MODE_SHIFT, |
| 133 | (unsigned long *)&e->msi.data); |
| 134 | |
| 135 | /* TODO Deal with RH bit of MSI message address */ |
| 136 | |
Sheng Yang | bfd349d | 2009-02-11 16:03:40 +0800 | [diff] [blame] | 137 | kvm_get_intr_delivery_bitmask(ioapic, &entry, deliver_bitmask); |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 138 | |
Sheng Yang | bfd349d | 2009-02-11 16:03:40 +0800 | [diff] [blame] | 139 | if (find_first_bit(deliver_bitmask, KVM_MAX_VCPUS) >= KVM_MAX_VCPUS) { |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 140 | printk(KERN_WARNING "kvm: no destination for MSI delivery!"); |
| 141 | return -1; |
| 142 | } |
Sheng Yang | bfd349d | 2009-02-11 16:03:40 +0800 | [diff] [blame] | 143 | while ((vcpu_id = find_first_bit(deliver_bitmask, |
| 144 | KVM_MAX_VCPUS)) < KVM_MAX_VCPUS) { |
| 145 | __clear_bit(vcpu_id, deliver_bitmask); |
Sheng Yang | 116191b | 2009-02-11 16:03:37 +0800 | [diff] [blame] | 146 | vcpu = ioapic->kvm->vcpus[vcpu_id]; |
| 147 | if (vcpu) { |
| 148 | if (r < 0) |
| 149 | r = 0; |
| 150 | r += kvm_apic_set_irq(vcpu, entry.fields.vector, |
| 151 | entry.fields.trig_mode); |
Sheng Yang | 79950e1 | 2009-02-10 13:57:06 +0800 | [diff] [blame] | 152 | } |
Sheng Yang | 79950e1 | 2009-02-10 13:57:06 +0800 | [diff] [blame] | 153 | } |
Gleb Natapov | 71450f7 | 2009-02-23 12:57:11 +0200 | [diff] [blame] | 154 | return r; |
Sheng Yang | 79950e1 | 2009-02-10 13:57:06 +0800 | [diff] [blame] | 155 | } |
| 156 | |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 157 | /* This should be called with the kvm->lock mutex held |
| 158 | * Return value: |
| 159 | * < 0 Interrupt was ignored (masked or not delivered for other reasons) |
| 160 | * = 0 Interrupt was coalesced (previous irq is still pending) |
| 161 | * > 0 Number of CPUs interrupt was delivered to |
| 162 | */ |
| 163 | int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level) |
Xiantao Zhang | 3de42dc | 2008-10-06 13:48:45 +0800 | [diff] [blame] | 164 | { |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 165 | struct kvm_kernel_irq_routing_entry *e; |
Sheng Yang | 79950e1 | 2009-02-10 13:57:06 +0800 | [diff] [blame] | 166 | unsigned long *irq_state, sig_level; |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 167 | int ret = -1; |
Sheng Yang | 5550af4 | 2008-10-15 20:15:06 +0800 | [diff] [blame] | 168 | |
Sheng Yang | 79950e1 | 2009-02-10 13:57:06 +0800 | [diff] [blame] | 169 | if (irq < KVM_IOAPIC_NUM_PINS) { |
| 170 | irq_state = (unsigned long *)&kvm->arch.irq_states[irq]; |
| 171 | |
| 172 | /* Logical OR for level trig interrupt */ |
| 173 | if (level) |
| 174 | set_bit(irq_source_id, irq_state); |
| 175 | else |
| 176 | clear_bit(irq_source_id, irq_state); |
| 177 | sig_level = !!(*irq_state); |
| 178 | } else /* Deal with MSI/MSI-X */ |
| 179 | sig_level = 1; |
Sheng Yang | 5550af4 | 2008-10-15 20:15:06 +0800 | [diff] [blame] | 180 | |
Xiantao Zhang | 3de42dc | 2008-10-06 13:48:45 +0800 | [diff] [blame] | 181 | /* Not possible to detect if the guest uses the PIC or the |
| 182 | * IOAPIC. So set the bit in both. The guest will ignore |
| 183 | * writes to the unused one. |
| 184 | */ |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 185 | list_for_each_entry(e, &kvm->irq_routing, link) |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 186 | if (e->gsi == irq) { |
| 187 | int r = e->set(e, kvm, sig_level); |
| 188 | if (r < 0) |
| 189 | continue; |
| 190 | |
| 191 | ret = r + ((ret < 0) ? 0 : ret); |
| 192 | } |
| 193 | return ret; |
Xiantao Zhang | 3de42dc | 2008-10-06 13:48:45 +0800 | [diff] [blame] | 194 | } |
| 195 | |
Marcelo Tosatti | 44882ee | 2009-01-27 15:12:38 -0200 | [diff] [blame] | 196 | void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin) |
Xiantao Zhang | 3de42dc | 2008-10-06 13:48:45 +0800 | [diff] [blame] | 197 | { |
Marcelo Tosatti | 44882ee | 2009-01-27 15:12:38 -0200 | [diff] [blame] | 198 | struct kvm_kernel_irq_routing_entry *e; |
Xiantao Zhang | 3de42dc | 2008-10-06 13:48:45 +0800 | [diff] [blame] | 199 | struct kvm_irq_ack_notifier *kian; |
| 200 | struct hlist_node *n; |
Marcelo Tosatti | 44882ee | 2009-01-27 15:12:38 -0200 | [diff] [blame] | 201 | unsigned gsi = pin; |
| 202 | |
| 203 | list_for_each_entry(e, &kvm->irq_routing, link) |
| 204 | if (e->irqchip.irqchip == irqchip && |
| 205 | e->irqchip.pin == pin) { |
| 206 | gsi = e->gsi; |
| 207 | break; |
| 208 | } |
Xiantao Zhang | 3de42dc | 2008-10-06 13:48:45 +0800 | [diff] [blame] | 209 | |
| 210 | hlist_for_each_entry(kian, n, &kvm->arch.irq_ack_notifier_list, link) |
| 211 | if (kian->gsi == gsi) |
| 212 | kian->irq_acked(kian); |
| 213 | } |
| 214 | |
| 215 | void kvm_register_irq_ack_notifier(struct kvm *kvm, |
| 216 | struct kvm_irq_ack_notifier *kian) |
| 217 | { |
| 218 | hlist_add_head(&kian->link, &kvm->arch.irq_ack_notifier_list); |
| 219 | } |
| 220 | |
Sheng Yang | e19e30e | 2008-10-20 16:07:10 +0800 | [diff] [blame] | 221 | void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian) |
Xiantao Zhang | 3de42dc | 2008-10-06 13:48:45 +0800 | [diff] [blame] | 222 | { |
Mark McLoughlin | fdd897e | 2008-12-01 13:57:46 +0000 | [diff] [blame] | 223 | hlist_del_init(&kian->link); |
Xiantao Zhang | 3de42dc | 2008-10-06 13:48:45 +0800 | [diff] [blame] | 224 | } |
Sheng Yang | 5550af4 | 2008-10-15 20:15:06 +0800 | [diff] [blame] | 225 | |
| 226 | /* The caller must hold kvm->lock mutex */ |
| 227 | int kvm_request_irq_source_id(struct kvm *kvm) |
| 228 | { |
| 229 | unsigned long *bitmap = &kvm->arch.irq_sources_bitmap; |
| 230 | int irq_source_id = find_first_zero_bit(bitmap, |
| 231 | sizeof(kvm->arch.irq_sources_bitmap)); |
Mark McLoughlin | 6155236 | 2008-12-01 13:57:48 +0000 | [diff] [blame] | 232 | |
Sheng Yang | 5550af4 | 2008-10-15 20:15:06 +0800 | [diff] [blame] | 233 | if (irq_source_id >= sizeof(kvm->arch.irq_sources_bitmap)) { |
| 234 | printk(KERN_WARNING "kvm: exhaust allocatable IRQ sources!\n"); |
Mark McLoughlin | 6155236 | 2008-12-01 13:57:48 +0000 | [diff] [blame] | 235 | return -EFAULT; |
| 236 | } |
| 237 | |
| 238 | ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID); |
| 239 | set_bit(irq_source_id, bitmap); |
| 240 | |
Sheng Yang | 5550af4 | 2008-10-15 20:15:06 +0800 | [diff] [blame] | 241 | return irq_source_id; |
| 242 | } |
| 243 | |
| 244 | void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id) |
| 245 | { |
| 246 | int i; |
| 247 | |
Mark McLoughlin | 6155236 | 2008-12-01 13:57:48 +0000 | [diff] [blame] | 248 | ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID); |
| 249 | |
| 250 | if (irq_source_id < 0 || |
Sheng Yang | 5550af4 | 2008-10-15 20:15:06 +0800 | [diff] [blame] | 251 | irq_source_id >= sizeof(kvm->arch.irq_sources_bitmap)) { |
| 252 | printk(KERN_ERR "kvm: IRQ source ID out of range!\n"); |
| 253 | return; |
| 254 | } |
| 255 | for (i = 0; i < KVM_IOAPIC_NUM_PINS; i++) |
| 256 | clear_bit(irq_source_id, &kvm->arch.irq_states[i]); |
| 257 | clear_bit(irq_source_id, &kvm->arch.irq_sources_bitmap); |
| 258 | } |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 259 | |
| 260 | void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, |
| 261 | struct kvm_irq_mask_notifier *kimn) |
| 262 | { |
| 263 | kimn->irq = irq; |
| 264 | hlist_add_head(&kimn->link, &kvm->mask_notifier_list); |
| 265 | } |
| 266 | |
| 267 | void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, |
| 268 | struct kvm_irq_mask_notifier *kimn) |
| 269 | { |
| 270 | hlist_del(&kimn->link); |
| 271 | } |
| 272 | |
| 273 | void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask) |
| 274 | { |
| 275 | struct kvm_irq_mask_notifier *kimn; |
| 276 | struct hlist_node *n; |
| 277 | |
| 278 | hlist_for_each_entry(kimn, n, &kvm->mask_notifier_list, link) |
| 279 | if (kimn->irq == irq) |
| 280 | kimn->func(kimn, mask); |
| 281 | } |
| 282 | |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 283 | static void __kvm_free_irq_routing(struct list_head *irq_routing) |
| 284 | { |
| 285 | struct kvm_kernel_irq_routing_entry *e, *n; |
| 286 | |
| 287 | list_for_each_entry_safe(e, n, irq_routing, link) |
| 288 | kfree(e); |
| 289 | } |
| 290 | |
| 291 | void kvm_free_irq_routing(struct kvm *kvm) |
| 292 | { |
| 293 | __kvm_free_irq_routing(&kvm->irq_routing); |
| 294 | } |
| 295 | |
Hannes Eder | cded19f | 2009-02-21 02:19:13 +0100 | [diff] [blame] | 296 | static int setup_routing_entry(struct kvm_kernel_irq_routing_entry *e, |
| 297 | const struct kvm_irq_routing_entry *ue) |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 298 | { |
| 299 | int r = -EINVAL; |
| 300 | int delta; |
| 301 | |
| 302 | e->gsi = ue->gsi; |
| 303 | switch (ue->type) { |
| 304 | case KVM_IRQ_ROUTING_IRQCHIP: |
| 305 | delta = 0; |
| 306 | switch (ue->u.irqchip.irqchip) { |
| 307 | case KVM_IRQCHIP_PIC_MASTER: |
| 308 | e->set = kvm_set_pic_irq; |
| 309 | break; |
| 310 | case KVM_IRQCHIP_PIC_SLAVE: |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 311 | e->set = kvm_set_pic_irq; |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 312 | delta = 8; |
| 313 | break; |
| 314 | case KVM_IRQCHIP_IOAPIC: |
| 315 | e->set = kvm_set_ioapic_irq; |
| 316 | break; |
| 317 | default: |
| 318 | goto out; |
| 319 | } |
| 320 | e->irqchip.irqchip = ue->u.irqchip.irqchip; |
| 321 | e->irqchip.pin = ue->u.irqchip.pin + delta; |
| 322 | break; |
Sheng Yang | 79950e1 | 2009-02-10 13:57:06 +0800 | [diff] [blame] | 323 | case KVM_IRQ_ROUTING_MSI: |
| 324 | e->set = kvm_set_msi; |
| 325 | e->msi.address_lo = ue->u.msi.address_lo; |
| 326 | e->msi.address_hi = ue->u.msi.address_hi; |
| 327 | e->msi.data = ue->u.msi.data; |
| 328 | break; |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 329 | default: |
| 330 | goto out; |
| 331 | } |
| 332 | r = 0; |
| 333 | out: |
| 334 | return r; |
| 335 | } |
| 336 | |
| 337 | |
| 338 | int kvm_set_irq_routing(struct kvm *kvm, |
| 339 | const struct kvm_irq_routing_entry *ue, |
| 340 | unsigned nr, |
| 341 | unsigned flags) |
| 342 | { |
| 343 | struct list_head irq_list = LIST_HEAD_INIT(irq_list); |
| 344 | struct list_head tmp = LIST_HEAD_INIT(tmp); |
| 345 | struct kvm_kernel_irq_routing_entry *e = NULL; |
| 346 | unsigned i; |
| 347 | int r; |
| 348 | |
| 349 | for (i = 0; i < nr; ++i) { |
| 350 | r = -EINVAL; |
| 351 | if (ue->gsi >= KVM_MAX_IRQ_ROUTES) |
| 352 | goto out; |
| 353 | if (ue->flags) |
| 354 | goto out; |
| 355 | r = -ENOMEM; |
| 356 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
| 357 | if (!e) |
| 358 | goto out; |
| 359 | r = setup_routing_entry(e, ue); |
| 360 | if (r) |
| 361 | goto out; |
| 362 | ++ue; |
| 363 | list_add(&e->link, &irq_list); |
| 364 | e = NULL; |
| 365 | } |
| 366 | |
| 367 | mutex_lock(&kvm->lock); |
| 368 | list_splice(&kvm->irq_routing, &tmp); |
| 369 | INIT_LIST_HEAD(&kvm->irq_routing); |
| 370 | list_splice(&irq_list, &kvm->irq_routing); |
| 371 | INIT_LIST_HEAD(&irq_list); |
| 372 | list_splice(&tmp, &irq_list); |
| 373 | mutex_unlock(&kvm->lock); |
| 374 | |
| 375 | r = 0; |
| 376 | |
| 377 | out: |
| 378 | kfree(e); |
| 379 | __kvm_free_irq_routing(&irq_list); |
| 380 | return r; |
| 381 | } |
| 382 | |
| 383 | #define IOAPIC_ROUTING_ENTRY(irq) \ |
| 384 | { .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP, \ |
| 385 | .u.irqchip.irqchip = KVM_IRQCHIP_IOAPIC, .u.irqchip.pin = (irq) } |
| 386 | #define ROUTING_ENTRY1(irq) IOAPIC_ROUTING_ENTRY(irq) |
| 387 | |
| 388 | #ifdef CONFIG_X86 |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 389 | # define PIC_ROUTING_ENTRY(irq) \ |
| 390 | { .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP, \ |
| 391 | .u.irqchip.irqchip = SELECT_PIC(irq), .u.irqchip.pin = (irq) % 8 } |
| 392 | # define ROUTING_ENTRY2(irq) \ |
| 393 | IOAPIC_ROUTING_ENTRY(irq), PIC_ROUTING_ENTRY(irq) |
| 394 | #else |
| 395 | # define ROUTING_ENTRY2(irq) \ |
| 396 | IOAPIC_ROUTING_ENTRY(irq) |
| 397 | #endif |
| 398 | |
| 399 | static const struct kvm_irq_routing_entry default_routing[] = { |
| 400 | ROUTING_ENTRY2(0), ROUTING_ENTRY2(1), |
| 401 | ROUTING_ENTRY2(2), ROUTING_ENTRY2(3), |
| 402 | ROUTING_ENTRY2(4), ROUTING_ENTRY2(5), |
| 403 | ROUTING_ENTRY2(6), ROUTING_ENTRY2(7), |
| 404 | ROUTING_ENTRY2(8), ROUTING_ENTRY2(9), |
| 405 | ROUTING_ENTRY2(10), ROUTING_ENTRY2(11), |
| 406 | ROUTING_ENTRY2(12), ROUTING_ENTRY2(13), |
| 407 | ROUTING_ENTRY2(14), ROUTING_ENTRY2(15), |
| 408 | ROUTING_ENTRY1(16), ROUTING_ENTRY1(17), |
| 409 | ROUTING_ENTRY1(18), ROUTING_ENTRY1(19), |
| 410 | ROUTING_ENTRY1(20), ROUTING_ENTRY1(21), |
| 411 | ROUTING_ENTRY1(22), ROUTING_ENTRY1(23), |
| 412 | #ifdef CONFIG_IA64 |
| 413 | ROUTING_ENTRY1(24), ROUTING_ENTRY1(25), |
| 414 | ROUTING_ENTRY1(26), ROUTING_ENTRY1(27), |
| 415 | ROUTING_ENTRY1(28), ROUTING_ENTRY1(29), |
| 416 | ROUTING_ENTRY1(30), ROUTING_ENTRY1(31), |
| 417 | ROUTING_ENTRY1(32), ROUTING_ENTRY1(33), |
| 418 | ROUTING_ENTRY1(34), ROUTING_ENTRY1(35), |
| 419 | ROUTING_ENTRY1(36), ROUTING_ENTRY1(37), |
| 420 | ROUTING_ENTRY1(38), ROUTING_ENTRY1(39), |
| 421 | ROUTING_ENTRY1(40), ROUTING_ENTRY1(41), |
| 422 | ROUTING_ENTRY1(42), ROUTING_ENTRY1(43), |
| 423 | ROUTING_ENTRY1(44), ROUTING_ENTRY1(45), |
| 424 | ROUTING_ENTRY1(46), ROUTING_ENTRY1(47), |
| 425 | #endif |
| 426 | }; |
| 427 | |
| 428 | int kvm_setup_default_irq_routing(struct kvm *kvm) |
| 429 | { |
| 430 | return kvm_set_irq_routing(kvm, default_routing, |
| 431 | ARRAY_SIZE(default_routing), 0); |
| 432 | } |