blob: 2eb58af7ee99268b81a01680db591ea4991c47eb [file] [log] [blame]
Xiantao Zhang3de42dc2008-10-06 13:48:45 +08001/*
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 *
Nicolas Kaiser9611c182010-10-06 14:23:22 +020020 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
Xiantao Zhang3de42dc2008-10-06 13:48:45 +080021 */
22
23#include <linux/kvm_host.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090024#include <linux/slab.h>
Marcelo Tosatti229456f2009-06-17 09:22:14 -030025#include <trace/events/kvm.h>
Sheng Yang79950e12009-02-10 13:57:06 +080026
Sheng Yang79950e12009-02-10 13:57:06 +080027#include <asm/msidef.h>
Gleb Natapov58c2dde2009-03-05 16:35:04 +020028#ifdef CONFIG_IA64
29#include <asm/iosapic.h>
30#endif
Sheng Yang79950e12009-02-10 13:57:06 +080031
Xiantao Zhang3de42dc2008-10-06 13:48:45 +080032#include "irq.h"
33
34#include "ioapic.h"
35
Gleb Natapov49256632009-02-04 17:28:14 +020036static int kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e,
Gleb Natapov1a6e4a82009-08-24 11:54:19 +030037 struct kvm *kvm, int irq_source_id, int level)
Avi Kivity399ec802008-11-19 13:58:46 +020038{
39#ifdef CONFIG_X86
Gleb Natapov1a6e4a82009-08-24 11:54:19 +030040 struct kvm_pic *pic = pic_irqchip(kvm);
Michael S. Tsirkin1a577b722012-07-19 13:45:20 +030041 return kvm_pic_set_irq(pic, e->irqchip.pin, irq_source_id, level);
Gleb Natapov49256632009-02-04 17:28:14 +020042#else
43 return -1;
Avi Kivity399ec802008-11-19 13:58:46 +020044#endif
45}
46
Gleb Natapov49256632009-02-04 17:28:14 +020047static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
Gleb Natapov1a6e4a82009-08-24 11:54:19 +030048 struct kvm *kvm, int irq_source_id, int level)
Avi Kivity399ec802008-11-19 13:58:46 +020049{
Gleb Natapov1a6e4a82009-08-24 11:54:19 +030050 struct kvm_ioapic *ioapic = kvm->arch.vioapic;
Michael S. Tsirkin1a577b722012-07-19 13:45:20 +030051 return kvm_ioapic_set_irq(ioapic, e->irqchip.pin, irq_source_id, level);
Avi Kivity399ec802008-11-19 13:58:46 +020052}
53
Gleb Natapov58c2dde2009-03-05 16:35:04 +020054inline static bool kvm_is_dm_lowest_prio(struct kvm_lapic_irq *irq)
Sheng Yang116191b2009-02-11 16:03:37 +080055{
Gleb Natapov58c2dde2009-03-05 16:35:04 +020056#ifdef CONFIG_IA64
57 return irq->delivery_mode ==
58 (IOSAPIC_LOWEST_PRIORITY << IOSAPIC_DELIVERY_SHIFT);
59#else
60 return irq->delivery_mode == APIC_DM_LOWEST;
61#endif
62}
Sheng Yang116191b2009-02-11 16:03:37 +080063
Gleb Natapov58c2dde2009-03-05 16:35:04 +020064int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
65 struct kvm_lapic_irq *irq)
66{
67 int i, r = -1;
68 struct kvm_vcpu *vcpu, *lowest = NULL;
69
70 if (irq->dest_mode == 0 && irq->dest_id == 0xff &&
Gleb Natapov1e08ec42012-09-13 17:19:24 +030071 kvm_is_dm_lowest_prio(irq)) {
Gleb Natapov343f94f2009-03-05 16:34:54 +020072 printk(KERN_INFO "kvm: apic: phys broadcast and lowest prio\n");
Gleb Natapov1e08ec42012-09-13 17:19:24 +030073 irq->delivery_mode = APIC_DM_FIXED;
74 }
75
76 if (kvm_irq_delivery_to_apic_fast(kvm, src, irq, &r))
77 return r;
Gleb Natapov343f94f2009-03-05 16:34:54 +020078
Gleb Natapov988a2ca2009-06-09 15:56:29 +030079 kvm_for_each_vcpu(i, vcpu, kvm) {
80 if (!kvm_apic_present(vcpu))
Gleb Natapov343f94f2009-03-05 16:34:54 +020081 continue;
Sheng Yang74a3a8f2009-03-04 13:33:02 +080082
Gleb Natapov58c2dde2009-03-05 16:35:04 +020083 if (!kvm_apic_match_dest(vcpu, src, irq->shorthand,
84 irq->dest_id, irq->dest_mode))
Gleb Natapov343f94f2009-03-05 16:34:54 +020085 continue;
86
Gleb Natapov58c2dde2009-03-05 16:35:04 +020087 if (!kvm_is_dm_lowest_prio(irq)) {
88 if (r < 0)
89 r = 0;
90 r += kvm_apic_set_irq(vcpu, irq);
Chris Lalancetteaefd18f2010-06-16 17:11:13 -040091 } else if (kvm_lapic_enabled(vcpu)) {
Gleb Natapov58c2dde2009-03-05 16:35:04 +020092 if (!lowest)
93 lowest = vcpu;
94 else if (kvm_apic_compare_prio(vcpu, lowest) < 0)
95 lowest = vcpu;
Gleb Natapove1035712009-03-05 16:34:59 +020096 }
Gleb Natapov343f94f2009-03-05 16:34:54 +020097 }
98
Gleb Natapov58c2dde2009-03-05 16:35:04 +020099 if (lowest)
100 r = kvm_apic_set_irq(lowest, irq);
101
102 return r;
Sheng Yang116191b2009-02-11 16:03:37 +0800103}
104
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200105int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
106 struct kvm *kvm, int irq_source_id, int level)
Sheng Yang79950e12009-02-10 13:57:06 +0800107{
Gleb Natapov58c2dde2009-03-05 16:35:04 +0200108 struct kvm_lapic_irq irq;
Sheng Yang79950e12009-02-10 13:57:06 +0800109
Gleb Natapov1a6e4a82009-08-24 11:54:19 +0300110 if (!level)
111 return -1;
112
Gleb Natapov1000ff82009-07-07 16:00:57 +0300113 trace_kvm_msi_set_irq(e->msi.address_lo, e->msi.data);
114
Gleb Natapov58c2dde2009-03-05 16:35:04 +0200115 irq.dest_id = (e->msi.address_lo &
Sheng Yang116191b2009-02-11 16:03:37 +0800116 MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;
Gleb Natapov58c2dde2009-03-05 16:35:04 +0200117 irq.vector = (e->msi.data &
Sheng Yang116191b2009-02-11 16:03:37 +0800118 MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
Gleb Natapov58c2dde2009-03-05 16:35:04 +0200119 irq.dest_mode = (1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo;
120 irq.trig_mode = (1 << MSI_DATA_TRIGGER_SHIFT) & e->msi.data;
121 irq.delivery_mode = e->msi.data & 0x700;
122 irq.level = 1;
123 irq.shorthand = 0;
Sheng Yang116191b2009-02-11 16:03:37 +0800124
125 /* TODO Deal with RH bit of MSI message address */
Gleb Natapov58c2dde2009-03-05 16:35:04 +0200126 return kvm_irq_delivery_to_apic(kvm, NULL, &irq);
Sheng Yang79950e12009-02-10 13:57:06 +0800127}
128
Jan Kiszka07975ad2012-03-29 21:14:12 +0200129int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi)
130{
131 struct kvm_kernel_irq_routing_entry route;
132
133 if (!irqchip_in_kernel(kvm) || msi->flags != 0)
134 return -EINVAL;
135
136 route.msi.address_lo = msi->address_lo;
137 route.msi.address_hi = msi->address_hi;
138 route.msi.data = msi->data;
139
140 return kvm_set_msi(&route, kvm, KVM_USERSPACE_IRQ_SOURCE_ID, 1);
141}
142
Gleb Natapov680b3642009-08-24 11:54:26 +0300143/*
Gleb Natapov49256632009-02-04 17:28:14 +0200144 * Return value:
145 * < 0 Interrupt was ignored (masked or not delivered for other reasons)
146 * = 0 Interrupt was coalesced (previous irq is still pending)
147 * > 0 Number of CPUs interrupt was delivered to
148 */
Gleb Natapov46e624b2009-08-24 11:54:20 +0300149int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level)
Xiantao Zhang3de42dc2008-10-06 13:48:45 +0800150{
Gleb Natapoveba02262009-08-24 11:54:25 +0300151 struct kvm_kernel_irq_routing_entry *e, irq_set[KVM_NR_IRQCHIPS];
152 int ret = -1, i = 0;
Gleb Natapov46e624b2009-08-24 11:54:20 +0300153 struct kvm_irq_routing_table *irq_rt;
154 struct hlist_node *n;
Sheng Yang5550af42008-10-15 20:15:06 +0800155
Avi Kivityae8c1c42009-07-01 12:09:41 +0300156 trace_kvm_set_irq(irq, level, irq_source_id);
Marcelo Tosatti229456f2009-06-17 09:22:14 -0300157
Xiantao Zhang3de42dc2008-10-06 13:48:45 +0800158 /* Not possible to detect if the guest uses the PIC or the
159 * IOAPIC. So set the bit in both. The guest will ignore
160 * writes to the unused one.
161 */
Gleb Natapove42bba92009-08-24 11:54:22 +0300162 rcu_read_lock();
163 irq_rt = rcu_dereference(kvm->irq_routing);
Gleb Natapov46e624b2009-08-24 11:54:20 +0300164 if (irq < irq_rt->nr_rt_entries)
Gleb Natapoveba02262009-08-24 11:54:25 +0300165 hlist_for_each_entry(e, n, &irq_rt->map[irq], link)
166 irq_set[i++] = *e;
Gleb Natapove42bba92009-08-24 11:54:22 +0300167 rcu_read_unlock();
Gleb Natapoveba02262009-08-24 11:54:25 +0300168
169 while(i--) {
170 int r;
171 r = irq_set[i].set(&irq_set[i], kvm, irq_source_id, level);
172 if (r < 0)
173 continue;
174
175 ret = r + ((ret < 0) ? 0 : ret);
176 }
177
Gleb Natapov49256632009-02-04 17:28:14 +0200178 return ret;
Xiantao Zhang3de42dc2008-10-06 13:48:45 +0800179}
180
Marcelo Tosatti44882ee2009-01-27 15:12:38 -0200181void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin)
Xiantao Zhang3de42dc2008-10-06 13:48:45 +0800182{
183 struct kvm_irq_ack_notifier *kian;
184 struct hlist_node *n;
Gleb Natapov3e71f882009-08-24 11:54:21 +0300185 int gsi;
Marcelo Tosatti44882ee2009-01-27 15:12:38 -0200186
Marcelo Tosatti229456f2009-06-17 09:22:14 -0300187 trace_kvm_ack_irq(irqchip, pin);
188
Gleb Natapove42bba92009-08-24 11:54:22 +0300189 rcu_read_lock();
190 gsi = rcu_dereference(kvm->irq_routing)->chip[irqchip][pin];
Gleb Natapov3e71f882009-08-24 11:54:21 +0300191 if (gsi != -1)
Gleb Natapov280aa172009-08-24 11:54:24 +0300192 hlist_for_each_entry_rcu(kian, n, &kvm->irq_ack_notifier_list,
193 link)
Gleb Natapov3e71f882009-08-24 11:54:21 +0300194 if (kian->gsi == gsi)
195 kian->irq_acked(kian);
Gleb Natapov280aa172009-08-24 11:54:24 +0300196 rcu_read_unlock();
Xiantao Zhang3de42dc2008-10-06 13:48:45 +0800197}
198
199void kvm_register_irq_ack_notifier(struct kvm *kvm,
200 struct kvm_irq_ack_notifier *kian)
201{
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300202 mutex_lock(&kvm->irq_lock);
Gleb Natapov280aa172009-08-24 11:54:24 +0300203 hlist_add_head_rcu(&kian->link, &kvm->irq_ack_notifier_list);
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300204 mutex_unlock(&kvm->irq_lock);
Xiantao Zhang3de42dc2008-10-06 13:48:45 +0800205}
206
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300207void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
208 struct kvm_irq_ack_notifier *kian)
Xiantao Zhang3de42dc2008-10-06 13:48:45 +0800209{
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300210 mutex_lock(&kvm->irq_lock);
Gleb Natapov280aa172009-08-24 11:54:24 +0300211 hlist_del_init_rcu(&kian->link);
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300212 mutex_unlock(&kvm->irq_lock);
Gleb Natapov280aa172009-08-24 11:54:24 +0300213 synchronize_rcu();
Xiantao Zhang3de42dc2008-10-06 13:48:45 +0800214}
Sheng Yang5550af42008-10-15 20:15:06 +0800215
Sheng Yang5550af42008-10-15 20:15:06 +0800216int kvm_request_irq_source_id(struct kvm *kvm)
217{
218 unsigned long *bitmap = &kvm->arch.irq_sources_bitmap;
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300219 int irq_source_id;
220
221 mutex_lock(&kvm->irq_lock);
Marcelo Tosatticd5a2682009-10-17 22:47:23 -0300222 irq_source_id = find_first_zero_bit(bitmap, BITS_PER_LONG);
Mark McLoughlin61552362008-12-01 13:57:48 +0000223
Marcelo Tosatticd5a2682009-10-17 22:47:23 -0300224 if (irq_source_id >= BITS_PER_LONG) {
Sheng Yang5550af42008-10-15 20:15:06 +0800225 printk(KERN_WARNING "kvm: exhaust allocatable IRQ sources!\n");
Jiri Slaby0c6ddce2009-09-25 09:33:38 +0200226 irq_source_id = -EFAULT;
227 goto unlock;
Mark McLoughlin61552362008-12-01 13:57:48 +0000228 }
229
230 ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID);
Alex Williamson7a844282012-09-21 11:58:03 -0600231#ifdef CONFIG_X86
232 ASSERT(irq_source_id != KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID);
233#endif
Mark McLoughlin61552362008-12-01 13:57:48 +0000234 set_bit(irq_source_id, bitmap);
Jiri Slaby0c6ddce2009-09-25 09:33:38 +0200235unlock:
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300236 mutex_unlock(&kvm->irq_lock);
Mark McLoughlin61552362008-12-01 13:57:48 +0000237
Sheng Yang5550af42008-10-15 20:15:06 +0800238 return irq_source_id;
239}
240
241void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id)
242{
Mark McLoughlin61552362008-12-01 13:57:48 +0000243 ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID);
Alex Williamson7a844282012-09-21 11:58:03 -0600244#ifdef CONFIG_X86
245 ASSERT(irq_source_id != KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID);
246#endif
Mark McLoughlin61552362008-12-01 13:57:48 +0000247
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300248 mutex_lock(&kvm->irq_lock);
Mark McLoughlin61552362008-12-01 13:57:48 +0000249 if (irq_source_id < 0 ||
Marcelo Tosatticd5a2682009-10-17 22:47:23 -0300250 irq_source_id >= BITS_PER_LONG) {
Sheng Yang5550af42008-10-15 20:15:06 +0800251 printk(KERN_ERR "kvm: IRQ source ID out of range!\n");
Jiri Slaby0c6ddce2009-09-25 09:33:38 +0200252 goto unlock;
Sheng Yang5550af42008-10-15 20:15:06 +0800253 }
Marcelo Tosattie50212b2009-10-29 13:44:17 -0200254 clear_bit(irq_source_id, &kvm->arch.irq_sources_bitmap);
255 if (!irqchip_in_kernel(kvm))
256 goto unlock;
257
Michael S. Tsirkin1a577b722012-07-19 13:45:20 +0300258 kvm_ioapic_clear_all(kvm->arch.vioapic, irq_source_id);
Gleb Natapov1a6e4a82009-08-24 11:54:19 +0300259#ifdef CONFIG_X86
Michael S. Tsirkin1a577b722012-07-19 13:45:20 +0300260 kvm_pic_clear_all(pic_irqchip(kvm), irq_source_id);
Gleb Natapov1a6e4a82009-08-24 11:54:19 +0300261#endif
Jiri Slaby0c6ddce2009-09-25 09:33:38 +0200262unlock:
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300263 mutex_unlock(&kvm->irq_lock);
Sheng Yang5550af42008-10-15 20:15:06 +0800264}
Avi Kivity75858a82009-01-04 17:10:50 +0200265
266void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
267 struct kvm_irq_mask_notifier *kimn)
268{
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300269 mutex_lock(&kvm->irq_lock);
Avi Kivity75858a82009-01-04 17:10:50 +0200270 kimn->irq = irq;
Gleb Natapov280aa172009-08-24 11:54:24 +0300271 hlist_add_head_rcu(&kimn->link, &kvm->mask_notifier_list);
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300272 mutex_unlock(&kvm->irq_lock);
Avi Kivity75858a82009-01-04 17:10:50 +0200273}
274
275void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
276 struct kvm_irq_mask_notifier *kimn)
277{
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300278 mutex_lock(&kvm->irq_lock);
Gleb Natapov280aa172009-08-24 11:54:24 +0300279 hlist_del_rcu(&kimn->link);
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300280 mutex_unlock(&kvm->irq_lock);
Gleb Natapov280aa172009-08-24 11:54:24 +0300281 synchronize_rcu();
Avi Kivity75858a82009-01-04 17:10:50 +0200282}
283
Gleb Natapov4a994352010-07-11 15:32:23 +0300284void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
285 bool mask)
Avi Kivity75858a82009-01-04 17:10:50 +0200286{
287 struct kvm_irq_mask_notifier *kimn;
288 struct hlist_node *n;
Gleb Natapov4a994352010-07-11 15:32:23 +0300289 int gsi;
Avi Kivity75858a82009-01-04 17:10:50 +0200290
Gleb Natapov280aa172009-08-24 11:54:24 +0300291 rcu_read_lock();
Gleb Natapov4a994352010-07-11 15:32:23 +0300292 gsi = rcu_dereference(kvm->irq_routing)->chip[irqchip][pin];
293 if (gsi != -1)
294 hlist_for_each_entry_rcu(kimn, n, &kvm->mask_notifier_list, link)
295 if (kimn->irq == gsi)
296 kimn->func(kimn, mask);
Gleb Natapov280aa172009-08-24 11:54:24 +0300297 rcu_read_unlock();
Avi Kivity75858a82009-01-04 17:10:50 +0200298}
299
Avi Kivity399ec802008-11-19 13:58:46 +0200300void kvm_free_irq_routing(struct kvm *kvm)
301{
Gleb Natapove42bba92009-08-24 11:54:22 +0300302 /* Called only during vm destruction. Nobody can use the pointer
303 at this stage */
Gleb Natapov46e624b2009-08-24 11:54:20 +0300304 kfree(kvm->irq_routing);
Avi Kivity399ec802008-11-19 13:58:46 +0200305}
306
Gleb Natapov46e624b2009-08-24 11:54:20 +0300307static int setup_routing_entry(struct kvm_irq_routing_table *rt,
308 struct kvm_kernel_irq_routing_entry *e,
Hannes Edercded19f2009-02-21 02:19:13 +0100309 const struct kvm_irq_routing_entry *ue)
Avi Kivity399ec802008-11-19 13:58:46 +0200310{
311 int r = -EINVAL;
312 int delta;
Marcelo Tosattid72118c2010-01-12 16:42:09 -0200313 unsigned max_pin;
Gleb Natapov46e624b2009-08-24 11:54:20 +0300314 struct kvm_kernel_irq_routing_entry *ei;
315 struct hlist_node *n;
316
317 /*
318 * Do not allow GSI to be mapped to the same irqchip more than once.
319 * Allow only one to one mapping between GSI and MSI.
320 */
321 hlist_for_each_entry(ei, n, &rt->map[ue->gsi], link)
322 if (ei->type == KVM_IRQ_ROUTING_MSI ||
Avi Kivityf2ebd422012-04-22 17:02:11 +0300323 ue->type == KVM_IRQ_ROUTING_MSI ||
Gleb Natapov46e624b2009-08-24 11:54:20 +0300324 ue->u.irqchip.irqchip == ei->irqchip.irqchip)
325 return r;
Avi Kivity399ec802008-11-19 13:58:46 +0200326
327 e->gsi = ue->gsi;
Michael S. Tsirkin5116d8f2009-07-26 17:10:01 +0300328 e->type = ue->type;
Avi Kivity399ec802008-11-19 13:58:46 +0200329 switch (ue->type) {
330 case KVM_IRQ_ROUTING_IRQCHIP:
331 delta = 0;
332 switch (ue->u.irqchip.irqchip) {
333 case KVM_IRQCHIP_PIC_MASTER:
334 e->set = kvm_set_pic_irq;
Michael S. Tsirkin93b65472012-07-19 13:55:53 +0300335 max_pin = PIC_NUM_PINS;
Avi Kivity399ec802008-11-19 13:58:46 +0200336 break;
337 case KVM_IRQCHIP_PIC_SLAVE:
Gleb Natapov49256632009-02-04 17:28:14 +0200338 e->set = kvm_set_pic_irq;
Michael S. Tsirkin93b65472012-07-19 13:55:53 +0300339 max_pin = PIC_NUM_PINS;
Avi Kivity399ec802008-11-19 13:58:46 +0200340 delta = 8;
341 break;
342 case KVM_IRQCHIP_IOAPIC:
Marcelo Tosattid72118c2010-01-12 16:42:09 -0200343 max_pin = KVM_IOAPIC_NUM_PINS;
Chris Wrightefbc1002009-05-01 14:15:43 -0700344 e->set = kvm_set_ioapic_irq;
Avi Kivity399ec802008-11-19 13:58:46 +0200345 break;
346 default:
347 goto out;
348 }
349 e->irqchip.irqchip = ue->u.irqchip.irqchip;
350 e->irqchip.pin = ue->u.irqchip.pin + delta;
Marcelo Tosattid72118c2010-01-12 16:42:09 -0200351 if (e->irqchip.pin >= max_pin)
Gleb Natapov3e71f882009-08-24 11:54:21 +0300352 goto out;
353 rt->chip[ue->u.irqchip.irqchip][e->irqchip.pin] = ue->gsi;
Avi Kivity399ec802008-11-19 13:58:46 +0200354 break;
Sheng Yang79950e12009-02-10 13:57:06 +0800355 case KVM_IRQ_ROUTING_MSI:
356 e->set = kvm_set_msi;
357 e->msi.address_lo = ue->u.msi.address_lo;
358 e->msi.address_hi = ue->u.msi.address_hi;
359 e->msi.data = ue->u.msi.data;
360 break;
Avi Kivity399ec802008-11-19 13:58:46 +0200361 default:
362 goto out;
363 }
Gleb Natapov46e624b2009-08-24 11:54:20 +0300364
365 hlist_add_head(&e->link, &rt->map[e->gsi]);
Avi Kivity399ec802008-11-19 13:58:46 +0200366 r = 0;
367out:
368 return r;
369}
370
371
372int kvm_set_irq_routing(struct kvm *kvm,
373 const struct kvm_irq_routing_entry *ue,
374 unsigned nr,
375 unsigned flags)
376{
Gleb Natapov46e624b2009-08-24 11:54:20 +0300377 struct kvm_irq_routing_table *new, *old;
Gleb Natapov3e71f882009-08-24 11:54:21 +0300378 u32 i, j, nr_rt_entries = 0;
Avi Kivity399ec802008-11-19 13:58:46 +0200379 int r;
380
381 for (i = 0; i < nr; ++i) {
Gleb Natapov46e624b2009-08-24 11:54:20 +0300382 if (ue[i].gsi >= KVM_MAX_IRQ_ROUTES)
383 return -EINVAL;
384 nr_rt_entries = max(nr_rt_entries, ue[i].gsi);
385 }
386
387 nr_rt_entries += 1;
388
389 new = kzalloc(sizeof(*new) + (nr_rt_entries * sizeof(struct hlist_head))
390 + (nr * sizeof(struct kvm_kernel_irq_routing_entry)),
391 GFP_KERNEL);
392
393 if (!new)
394 return -ENOMEM;
395
396 new->rt_entries = (void *)&new->map[nr_rt_entries];
397
398 new->nr_rt_entries = nr_rt_entries;
Gleb Natapov3e71f882009-08-24 11:54:21 +0300399 for (i = 0; i < 3; i++)
400 for (j = 0; j < KVM_IOAPIC_NUM_PINS; j++)
401 new->chip[i][j] = -1;
Gleb Natapov46e624b2009-08-24 11:54:20 +0300402
403 for (i = 0; i < nr; ++i) {
Avi Kivity399ec802008-11-19 13:58:46 +0200404 r = -EINVAL;
Avi Kivity399ec802008-11-19 13:58:46 +0200405 if (ue->flags)
406 goto out;
Gleb Natapov46e624b2009-08-24 11:54:20 +0300407 r = setup_routing_entry(new, &new->rt_entries[i], ue);
Avi Kivity399ec802008-11-19 13:58:46 +0200408 if (r)
409 goto out;
410 ++ue;
Avi Kivity399ec802008-11-19 13:58:46 +0200411 }
412
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300413 mutex_lock(&kvm->irq_lock);
Gleb Natapov46e624b2009-08-24 11:54:20 +0300414 old = kvm->irq_routing;
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200415 kvm_irq_routing_update(kvm, new);
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300416 mutex_unlock(&kvm->irq_lock);
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200417
Gleb Natapove42bba92009-08-24 11:54:22 +0300418 synchronize_rcu();
Avi Kivity399ec802008-11-19 13:58:46 +0200419
Gleb Natapov46e624b2009-08-24 11:54:20 +0300420 new = old;
Avi Kivity399ec802008-11-19 13:58:46 +0200421 r = 0;
422
423out:
Gleb Natapov46e624b2009-08-24 11:54:20 +0300424 kfree(new);
Avi Kivity399ec802008-11-19 13:58:46 +0200425 return r;
426}
427
428#define IOAPIC_ROUTING_ENTRY(irq) \
429 { .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP, \
430 .u.irqchip.irqchip = KVM_IRQCHIP_IOAPIC, .u.irqchip.pin = (irq) }
431#define ROUTING_ENTRY1(irq) IOAPIC_ROUTING_ENTRY(irq)
432
433#ifdef CONFIG_X86
Avi Kivity399ec802008-11-19 13:58:46 +0200434# define PIC_ROUTING_ENTRY(irq) \
435 { .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP, \
436 .u.irqchip.irqchip = SELECT_PIC(irq), .u.irqchip.pin = (irq) % 8 }
437# define ROUTING_ENTRY2(irq) \
438 IOAPIC_ROUTING_ENTRY(irq), PIC_ROUTING_ENTRY(irq)
439#else
440# define ROUTING_ENTRY2(irq) \
441 IOAPIC_ROUTING_ENTRY(irq)
442#endif
443
444static const struct kvm_irq_routing_entry default_routing[] = {
445 ROUTING_ENTRY2(0), ROUTING_ENTRY2(1),
446 ROUTING_ENTRY2(2), ROUTING_ENTRY2(3),
447 ROUTING_ENTRY2(4), ROUTING_ENTRY2(5),
448 ROUTING_ENTRY2(6), ROUTING_ENTRY2(7),
449 ROUTING_ENTRY2(8), ROUTING_ENTRY2(9),
450 ROUTING_ENTRY2(10), ROUTING_ENTRY2(11),
451 ROUTING_ENTRY2(12), ROUTING_ENTRY2(13),
452 ROUTING_ENTRY2(14), ROUTING_ENTRY2(15),
453 ROUTING_ENTRY1(16), ROUTING_ENTRY1(17),
454 ROUTING_ENTRY1(18), ROUTING_ENTRY1(19),
455 ROUTING_ENTRY1(20), ROUTING_ENTRY1(21),
456 ROUTING_ENTRY1(22), ROUTING_ENTRY1(23),
457#ifdef CONFIG_IA64
458 ROUTING_ENTRY1(24), ROUTING_ENTRY1(25),
459 ROUTING_ENTRY1(26), ROUTING_ENTRY1(27),
460 ROUTING_ENTRY1(28), ROUTING_ENTRY1(29),
461 ROUTING_ENTRY1(30), ROUTING_ENTRY1(31),
462 ROUTING_ENTRY1(32), ROUTING_ENTRY1(33),
463 ROUTING_ENTRY1(34), ROUTING_ENTRY1(35),
464 ROUTING_ENTRY1(36), ROUTING_ENTRY1(37),
465 ROUTING_ENTRY1(38), ROUTING_ENTRY1(39),
466 ROUTING_ENTRY1(40), ROUTING_ENTRY1(41),
467 ROUTING_ENTRY1(42), ROUTING_ENTRY1(43),
468 ROUTING_ENTRY1(44), ROUTING_ENTRY1(45),
469 ROUTING_ENTRY1(46), ROUTING_ENTRY1(47),
470#endif
471};
472
473int kvm_setup_default_irq_routing(struct kvm *kvm)
474{
475 return kvm_set_irq_routing(kvm, default_routing,
476 ARRAY_SIZE(default_routing), 0);
477}