Eric Lee / linux-smarc-t335x-v3.2

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Commit aefd18f01ee848448d834c80e601ccff61515811

Authored by Chris Lalancette
Committed by Avi Kivity
1 parent e7dca5c0eb
Exists in master and in 4 other branches v3.2_AM335xPSP_04.06.00.11, v3.2_NEWT335xPSP_04.06.00.11, v3.2_SBC_SMARTMEN, v3.2_SMARCT335xPSP_04.06.00.11

KVM: x86: In DM_LOWEST, only deliver interrupts to vcpus with enabled LAPIC's 

Otherwise we might try to deliver a timer interrupt to a cpu that
can't possibly handle it.

Signed-off-by: Chris Lalancette <clalance@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

Showing 1 changed file with 1 additions and 1 deletions Inline Diff

1 /* 1 /*
2 * irq_comm.c: Common API for in kernel interrupt controller 2 * irq_comm.c: Common API for in kernel interrupt controller
3 * Copyright (c) 2007, Intel Corporation. 3 * Copyright (c) 2007, Intel Corporation.
4 * 4 *
5 * This program is free software; you can redistribute it and/or modify it 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, 6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation. 7 * version 2, as published by the Free Software Foundation.
8 * 8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT 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 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details. 12 * more details.
13 * 13 *
14 * You should have received a copy of the GNU General Public License along with 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 15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
16 * Place - Suite 330, Boston, MA 02111-1307 USA. 16 * Place - Suite 330, Boston, MA 02111-1307 USA.
17 * Authors: 17 * Authors:
18 * Yaozu (Eddie) Dong <Eddie.dong@intel.com> 18 * Yaozu (Eddie) Dong <Eddie.dong@intel.com>
19 * 19 *
20 * Copyright 2010 Red Hat, Inc. and/or its affilates. 20 * Copyright 2010 Red Hat, Inc. and/or its affilates.
21 */ 21 */
22 22
23 #include <linux/kvm_host.h> 23 #include <linux/kvm_host.h>
24 #include <linux/slab.h> 24 #include <linux/slab.h>
25 #include <trace/events/kvm.h> 25 #include <trace/events/kvm.h>
26 26
27 #include <asm/msidef.h> 27 #include <asm/msidef.h>
28 #ifdef CONFIG_IA64 28 #ifdef CONFIG_IA64
29 #include <asm/iosapic.h> 29 #include <asm/iosapic.h>
30 #endif 30 #endif
31 31
32 #include "irq.h" 32 #include "irq.h"
33 33
34 #include "ioapic.h" 34 #include "ioapic.h"
35 35
36 static inline int kvm_irq_line_state(unsigned long *irq_state, 36 static inline int kvm_irq_line_state(unsigned long *irq_state,
37 int irq_source_id, int level) 37 int irq_source_id, int level)
38 { 38 {
39 /* Logical OR for level trig interrupt */ 39 /* Logical OR for level trig interrupt */
40 if (level) 40 if (level)
41 set_bit(irq_source_id, irq_state); 41 set_bit(irq_source_id, irq_state);
42 else 42 else
43 clear_bit(irq_source_id, irq_state); 43 clear_bit(irq_source_id, irq_state);
44 44
45 return !!(*irq_state); 45 return !!(*irq_state);
46 } 46 }
47 47
48 static int kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e, 48 static int kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e,
49 struct kvm *kvm, int irq_source_id, int level) 49 struct kvm *kvm, int irq_source_id, int level)
50 { 50 {
51 #ifdef CONFIG_X86 51 #ifdef CONFIG_X86
52 struct kvm_pic *pic = pic_irqchip(kvm); 52 struct kvm_pic *pic = pic_irqchip(kvm);
53 level = kvm_irq_line_state(&pic->irq_states[e->irqchip.pin], 53 level = kvm_irq_line_state(&pic->irq_states[e->irqchip.pin],
54 irq_source_id, level); 54 irq_source_id, level);
55 return kvm_pic_set_irq(pic, e->irqchip.pin, level); 55 return kvm_pic_set_irq(pic, e->irqchip.pin, level);
56 #else 56 #else
57 return -1; 57 return -1;
58 #endif 58 #endif
59 } 59 }
60 60
61 static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e, 61 static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
62 struct kvm *kvm, int irq_source_id, int level) 62 struct kvm *kvm, int irq_source_id, int level)
63 { 63 {
64 struct kvm_ioapic *ioapic = kvm->arch.vioapic; 64 struct kvm_ioapic *ioapic = kvm->arch.vioapic;
65 level = kvm_irq_line_state(&ioapic->irq_states[e->irqchip.pin], 65 level = kvm_irq_line_state(&ioapic->irq_states[e->irqchip.pin],
66 irq_source_id, level); 66 irq_source_id, level);
67 67
68 return kvm_ioapic_set_irq(ioapic, e->irqchip.pin, level); 68 return kvm_ioapic_set_irq(ioapic, e->irqchip.pin, level);
69 } 69 }
70 70
71 inline static bool kvm_is_dm_lowest_prio(struct kvm_lapic_irq *irq) 71 inline static bool kvm_is_dm_lowest_prio(struct kvm_lapic_irq *irq)
72 { 72 {
73 #ifdef CONFIG_IA64 73 #ifdef CONFIG_IA64
74 return irq->delivery_mode == 74 return irq->delivery_mode ==
75 (IOSAPIC_LOWEST_PRIORITY << IOSAPIC_DELIVERY_SHIFT); 75 (IOSAPIC_LOWEST_PRIORITY << IOSAPIC_DELIVERY_SHIFT);
76 #else 76 #else
77 return irq->delivery_mode == APIC_DM_LOWEST; 77 return irq->delivery_mode == APIC_DM_LOWEST;
78 #endif 78 #endif
79 } 79 }
80 80
81 int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src, 81 int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
82 struct kvm_lapic_irq *irq) 82 struct kvm_lapic_irq *irq)
83 { 83 {
84 int i, r = -1; 84 int i, r = -1;
85 struct kvm_vcpu *vcpu, *lowest = NULL; 85 struct kvm_vcpu *vcpu, *lowest = NULL;
86 86
87 if (irq->dest_mode == 0 && irq->dest_id == 0xff && 87 if (irq->dest_mode == 0 && irq->dest_id == 0xff &&
88 kvm_is_dm_lowest_prio(irq)) 88 kvm_is_dm_lowest_prio(irq))
89 printk(KERN_INFO "kvm: apic: phys broadcast and lowest prio\n"); 89 printk(KERN_INFO "kvm: apic: phys broadcast and lowest prio\n");
90 90
91 kvm_for_each_vcpu(i, vcpu, kvm) { 91 kvm_for_each_vcpu(i, vcpu, kvm) {
92 if (!kvm_apic_present(vcpu)) 92 if (!kvm_apic_present(vcpu))
93 continue; 93 continue;
94 94
95 if (!kvm_apic_match_dest(vcpu, src, irq->shorthand, 95 if (!kvm_apic_match_dest(vcpu, src, irq->shorthand,
96 irq->dest_id, irq->dest_mode)) 96 irq->dest_id, irq->dest_mode))
97 continue; 97 continue;
98 98
99 if (!kvm_is_dm_lowest_prio(irq)) { 99 if (!kvm_is_dm_lowest_prio(irq)) {
100 if (r < 0) 100 if (r < 0)
101 r = 0; 101 r = 0;
102 r += kvm_apic_set_irq(vcpu, irq); 102 r += kvm_apic_set_irq(vcpu, irq);
103 } else { 103 } else if (kvm_lapic_enabled(vcpu)) {
104 if (!lowest) 104 if (!lowest)
105 lowest = vcpu; 105 lowest = vcpu;
106 else if (kvm_apic_compare_prio(vcpu, lowest) < 0) 106 else if (kvm_apic_compare_prio(vcpu, lowest) < 0)
107 lowest = vcpu; 107 lowest = vcpu;
108 } 108 }
109 } 109 }
110 110
111 if (lowest) 111 if (lowest)
112 r = kvm_apic_set_irq(lowest, irq); 112 r = kvm_apic_set_irq(lowest, irq);
113 113
114 return r; 114 return r;
115 } 115 }
116 116
117 static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, 117 static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
118 struct kvm *kvm, int irq_source_id, int level) 118 struct kvm *kvm, int irq_source_id, int level)
119 { 119 {
120 struct kvm_lapic_irq irq; 120 struct kvm_lapic_irq irq;
121 121
122 if (!level) 122 if (!level)
123 return -1; 123 return -1;
124 124
125 trace_kvm_msi_set_irq(e->msi.address_lo, e->msi.data); 125 trace_kvm_msi_set_irq(e->msi.address_lo, e->msi.data);
126 126
127 irq.dest_id = (e->msi.address_lo & 127 irq.dest_id = (e->msi.address_lo &
128 MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT; 128 MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;
129 irq.vector = (e->msi.data & 129 irq.vector = (e->msi.data &
130 MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT; 130 MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
131 irq.dest_mode = (1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo; 131 irq.dest_mode = (1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo;
132 irq.trig_mode = (1 << MSI_DATA_TRIGGER_SHIFT) & e->msi.data; 132 irq.trig_mode = (1 << MSI_DATA_TRIGGER_SHIFT) & e->msi.data;
133 irq.delivery_mode = e->msi.data & 0x700; 133 irq.delivery_mode = e->msi.data & 0x700;
134 irq.level = 1; 134 irq.level = 1;
135 irq.shorthand = 0; 135 irq.shorthand = 0;
136 136
137 /* TODO Deal with RH bit of MSI message address */ 137 /* TODO Deal with RH bit of MSI message address */
138 return kvm_irq_delivery_to_apic(kvm, NULL, &irq); 138 return kvm_irq_delivery_to_apic(kvm, NULL, &irq);
139 } 139 }
140 140
141 /* 141 /*
142 * Return value: 142 * Return value:
143 * < 0 Interrupt was ignored (masked or not delivered for other reasons) 143 * < 0 Interrupt was ignored (masked or not delivered for other reasons)
144 * = 0 Interrupt was coalesced (previous irq is still pending) 144 * = 0 Interrupt was coalesced (previous irq is still pending)
145 * > 0 Number of CPUs interrupt was delivered to 145 * > 0 Number of CPUs interrupt was delivered to
146 */ 146 */
147 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level) 147 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level)
148 { 148 {
149 struct kvm_kernel_irq_routing_entry *e, irq_set[KVM_NR_IRQCHIPS]; 149 struct kvm_kernel_irq_routing_entry *e, irq_set[KVM_NR_IRQCHIPS];
150 int ret = -1, i = 0; 150 int ret = -1, i = 0;
151 struct kvm_irq_routing_table *irq_rt; 151 struct kvm_irq_routing_table *irq_rt;
152 struct hlist_node *n; 152 struct hlist_node *n;
153 153
154 trace_kvm_set_irq(irq, level, irq_source_id); 154 trace_kvm_set_irq(irq, level, irq_source_id);
155 155
156 /* Not possible to detect if the guest uses the PIC or the 156 /* Not possible to detect if the guest uses the PIC or the
157 * IOAPIC. So set the bit in both. The guest will ignore 157 * IOAPIC. So set the bit in both. The guest will ignore
158 * writes to the unused one. 158 * writes to the unused one.
159 */ 159 */
160 rcu_read_lock(); 160 rcu_read_lock();
161 irq_rt = rcu_dereference(kvm->irq_routing); 161 irq_rt = rcu_dereference(kvm->irq_routing);
162 if (irq < irq_rt->nr_rt_entries) 162 if (irq < irq_rt->nr_rt_entries)
163 hlist_for_each_entry(e, n, &irq_rt->map[irq], link) 163 hlist_for_each_entry(e, n, &irq_rt->map[irq], link)
164 irq_set[i++] = *e; 164 irq_set[i++] = *e;
165 rcu_read_unlock(); 165 rcu_read_unlock();
166 166
167 while(i--) { 167 while(i--) {
168 int r; 168 int r;
169 r = irq_set[i].set(&irq_set[i], kvm, irq_source_id, level); 169 r = irq_set[i].set(&irq_set[i], kvm, irq_source_id, level);
170 if (r < 0) 170 if (r < 0)
171 continue; 171 continue;
172 172
173 ret = r + ((ret < 0) ? 0 : ret); 173 ret = r + ((ret < 0) ? 0 : ret);
174 } 174 }
175 175
176 return ret; 176 return ret;
177 } 177 }
178 178
179 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin) 179 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin)
180 { 180 {
181 struct kvm_irq_ack_notifier *kian; 181 struct kvm_irq_ack_notifier *kian;
182 struct hlist_node *n; 182 struct hlist_node *n;
183 int gsi; 183 int gsi;
184 184
185 trace_kvm_ack_irq(irqchip, pin); 185 trace_kvm_ack_irq(irqchip, pin);
186 186
187 rcu_read_lock(); 187 rcu_read_lock();
188 gsi = rcu_dereference(kvm->irq_routing)->chip[irqchip][pin]; 188 gsi = rcu_dereference(kvm->irq_routing)->chip[irqchip][pin];
189 if (gsi != -1) 189 if (gsi != -1)
190 hlist_for_each_entry_rcu(kian, n, &kvm->irq_ack_notifier_list, 190 hlist_for_each_entry_rcu(kian, n, &kvm->irq_ack_notifier_list,
191 link) 191 link)
192 if (kian->gsi == gsi) 192 if (kian->gsi == gsi)
193 kian->irq_acked(kian); 193 kian->irq_acked(kian);
194 rcu_read_unlock(); 194 rcu_read_unlock();
195 } 195 }
196 196
197 void kvm_register_irq_ack_notifier(struct kvm *kvm, 197 void kvm_register_irq_ack_notifier(struct kvm *kvm,
198 struct kvm_irq_ack_notifier *kian) 198 struct kvm_irq_ack_notifier *kian)
199 { 199 {
200 mutex_lock(&kvm->irq_lock); 200 mutex_lock(&kvm->irq_lock);
201 hlist_add_head_rcu(&kian->link, &kvm->irq_ack_notifier_list); 201 hlist_add_head_rcu(&kian->link, &kvm->irq_ack_notifier_list);
202 mutex_unlock(&kvm->irq_lock); 202 mutex_unlock(&kvm->irq_lock);
203 } 203 }
204 204
205 void kvm_unregister_irq_ack_notifier(struct kvm *kvm, 205 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
206 struct kvm_irq_ack_notifier *kian) 206 struct kvm_irq_ack_notifier *kian)
207 { 207 {
208 mutex_lock(&kvm->irq_lock); 208 mutex_lock(&kvm->irq_lock);
209 hlist_del_init_rcu(&kian->link); 209 hlist_del_init_rcu(&kian->link);
210 mutex_unlock(&kvm->irq_lock); 210 mutex_unlock(&kvm->irq_lock);
211 synchronize_rcu(); 211 synchronize_rcu();
212 } 212 }
213 213
214 int kvm_request_irq_source_id(struct kvm *kvm) 214 int kvm_request_irq_source_id(struct kvm *kvm)
215 { 215 {
216 unsigned long *bitmap = &kvm->arch.irq_sources_bitmap; 216 unsigned long *bitmap = &kvm->arch.irq_sources_bitmap;
217 int irq_source_id; 217 int irq_source_id;
218 218
219 mutex_lock(&kvm->irq_lock); 219 mutex_lock(&kvm->irq_lock);
220 irq_source_id = find_first_zero_bit(bitmap, BITS_PER_LONG); 220 irq_source_id = find_first_zero_bit(bitmap, BITS_PER_LONG);
221 221
222 if (irq_source_id >= BITS_PER_LONG) { 222 if (irq_source_id >= BITS_PER_LONG) {
223 printk(KERN_WARNING "kvm: exhaust allocatable IRQ sources!\n"); 223 printk(KERN_WARNING "kvm: exhaust allocatable IRQ sources!\n");
224 irq_source_id = -EFAULT; 224 irq_source_id = -EFAULT;
225 goto unlock; 225 goto unlock;
226 } 226 }
227 227
228 ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID); 228 ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID);
229 set_bit(irq_source_id, bitmap); 229 set_bit(irq_source_id, bitmap);
230 unlock: 230 unlock:
231 mutex_unlock(&kvm->irq_lock); 231 mutex_unlock(&kvm->irq_lock);
232 232
233 return irq_source_id; 233 return irq_source_id;
234 } 234 }
235 235
236 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id) 236 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id)
237 { 237 {
238 int i; 238 int i;
239 239
240 ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID); 240 ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID);
241 241
242 mutex_lock(&kvm->irq_lock); 242 mutex_lock(&kvm->irq_lock);
243 if (irq_source_id < 0 || 243 if (irq_source_id < 0 ||
244 irq_source_id >= BITS_PER_LONG) { 244 irq_source_id >= BITS_PER_LONG) {
245 printk(KERN_ERR "kvm: IRQ source ID out of range!\n"); 245 printk(KERN_ERR "kvm: IRQ source ID out of range!\n");
246 goto unlock; 246 goto unlock;
247 } 247 }
248 clear_bit(irq_source_id, &kvm->arch.irq_sources_bitmap); 248 clear_bit(irq_source_id, &kvm->arch.irq_sources_bitmap);
249 if (!irqchip_in_kernel(kvm)) 249 if (!irqchip_in_kernel(kvm))
250 goto unlock; 250 goto unlock;
251 251
252 for (i = 0; i < KVM_IOAPIC_NUM_PINS; i++) { 252 for (i = 0; i < KVM_IOAPIC_NUM_PINS; i++) {
253 clear_bit(irq_source_id, &kvm->arch.vioapic->irq_states[i]); 253 clear_bit(irq_source_id, &kvm->arch.vioapic->irq_states[i]);
254 if (i >= 16) 254 if (i >= 16)
255 continue; 255 continue;
256 #ifdef CONFIG_X86 256 #ifdef CONFIG_X86
257 clear_bit(irq_source_id, &pic_irqchip(kvm)->irq_states[i]); 257 clear_bit(irq_source_id, &pic_irqchip(kvm)->irq_states[i]);
258 #endif 258 #endif
259 } 259 }
260 unlock: 260 unlock:
261 mutex_unlock(&kvm->irq_lock); 261 mutex_unlock(&kvm->irq_lock);
262 } 262 }
263 263
264 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 264 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
265 struct kvm_irq_mask_notifier *kimn) 265 struct kvm_irq_mask_notifier *kimn)
266 { 266 {
267 mutex_lock(&kvm->irq_lock); 267 mutex_lock(&kvm->irq_lock);
268 kimn->irq = irq; 268 kimn->irq = irq;
269 hlist_add_head_rcu(&kimn->link, &kvm->mask_notifier_list); 269 hlist_add_head_rcu(&kimn->link, &kvm->mask_notifier_list);
270 mutex_unlock(&kvm->irq_lock); 270 mutex_unlock(&kvm->irq_lock);
271 } 271 }
272 272
273 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 273 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
274 struct kvm_irq_mask_notifier *kimn) 274 struct kvm_irq_mask_notifier *kimn)
275 { 275 {
276 mutex_lock(&kvm->irq_lock); 276 mutex_lock(&kvm->irq_lock);
277 hlist_del_rcu(&kimn->link); 277 hlist_del_rcu(&kimn->link);
278 mutex_unlock(&kvm->irq_lock); 278 mutex_unlock(&kvm->irq_lock);
279 synchronize_rcu(); 279 synchronize_rcu();
280 } 280 }
281 281
282 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask) 282 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask)
283 { 283 {
284 struct kvm_irq_mask_notifier *kimn; 284 struct kvm_irq_mask_notifier *kimn;
285 struct hlist_node *n; 285 struct hlist_node *n;
286 286
287 rcu_read_lock(); 287 rcu_read_lock();
288 hlist_for_each_entry_rcu(kimn, n, &kvm->mask_notifier_list, link) 288 hlist_for_each_entry_rcu(kimn, n, &kvm->mask_notifier_list, link)
289 if (kimn->irq == irq) 289 if (kimn->irq == irq)
290 kimn->func(kimn, mask); 290 kimn->func(kimn, mask);
291 rcu_read_unlock(); 291 rcu_read_unlock();
292 } 292 }
293 293
294 void kvm_free_irq_routing(struct kvm *kvm) 294 void kvm_free_irq_routing(struct kvm *kvm)
295 { 295 {
296 /* Called only during vm destruction. Nobody can use the pointer 296 /* Called only during vm destruction. Nobody can use the pointer
297 at this stage */ 297 at this stage */
298 kfree(kvm->irq_routing); 298 kfree(kvm->irq_routing);
299 } 299 }
300 300
301 static int setup_routing_entry(struct kvm_irq_routing_table *rt, 301 static int setup_routing_entry(struct kvm_irq_routing_table *rt,
302 struct kvm_kernel_irq_routing_entry *e, 302 struct kvm_kernel_irq_routing_entry *e,
303 const struct kvm_irq_routing_entry *ue) 303 const struct kvm_irq_routing_entry *ue)
304 { 304 {
305 int r = -EINVAL; 305 int r = -EINVAL;
306 int delta; 306 int delta;
307 unsigned max_pin; 307 unsigned max_pin;
308 struct kvm_kernel_irq_routing_entry *ei; 308 struct kvm_kernel_irq_routing_entry *ei;
309 struct hlist_node *n; 309 struct hlist_node *n;
310 310
311 /* 311 /*
312 * Do not allow GSI to be mapped to the same irqchip more than once. 312 * Do not allow GSI to be mapped to the same irqchip more than once.
313 * Allow only one to one mapping between GSI and MSI. 313 * Allow only one to one mapping between GSI and MSI.
314 */ 314 */
315 hlist_for_each_entry(ei, n, &rt->map[ue->gsi], link) 315 hlist_for_each_entry(ei, n, &rt->map[ue->gsi], link)
316 if (ei->type == KVM_IRQ_ROUTING_MSI || 316 if (ei->type == KVM_IRQ_ROUTING_MSI ||
317 ue->u.irqchip.irqchip == ei->irqchip.irqchip) 317 ue->u.irqchip.irqchip == ei->irqchip.irqchip)
318 return r; 318 return r;
319 319
320 e->gsi = ue->gsi; 320 e->gsi = ue->gsi;
321 e->type = ue->type; 321 e->type = ue->type;
322 switch (ue->type) { 322 switch (ue->type) {
323 case KVM_IRQ_ROUTING_IRQCHIP: 323 case KVM_IRQ_ROUTING_IRQCHIP:
324 delta = 0; 324 delta = 0;
325 switch (ue->u.irqchip.irqchip) { 325 switch (ue->u.irqchip.irqchip) {
326 case KVM_IRQCHIP_PIC_MASTER: 326 case KVM_IRQCHIP_PIC_MASTER:
327 e->set = kvm_set_pic_irq; 327 e->set = kvm_set_pic_irq;
328 max_pin = 16; 328 max_pin = 16;
329 break; 329 break;
330 case KVM_IRQCHIP_PIC_SLAVE: 330 case KVM_IRQCHIP_PIC_SLAVE:
331 e->set = kvm_set_pic_irq; 331 e->set = kvm_set_pic_irq;
332 max_pin = 16; 332 max_pin = 16;
333 delta = 8; 333 delta = 8;
334 break; 334 break;
335 case KVM_IRQCHIP_IOAPIC: 335 case KVM_IRQCHIP_IOAPIC:
336 max_pin = KVM_IOAPIC_NUM_PINS; 336 max_pin = KVM_IOAPIC_NUM_PINS;
337 e->set = kvm_set_ioapic_irq; 337 e->set = kvm_set_ioapic_irq;
338 break; 338 break;
339 default: 339 default:
340 goto out; 340 goto out;
341 } 341 }
342 e->irqchip.irqchip = ue->u.irqchip.irqchip; 342 e->irqchip.irqchip = ue->u.irqchip.irqchip;
343 e->irqchip.pin = ue->u.irqchip.pin + delta; 343 e->irqchip.pin = ue->u.irqchip.pin + delta;
344 if (e->irqchip.pin >= max_pin) 344 if (e->irqchip.pin >= max_pin)
345 goto out; 345 goto out;
346 rt->chip[ue->u.irqchip.irqchip][e->irqchip.pin] = ue->gsi; 346 rt->chip[ue->u.irqchip.irqchip][e->irqchip.pin] = ue->gsi;
347 break; 347 break;
348 case KVM_IRQ_ROUTING_MSI: 348 case KVM_IRQ_ROUTING_MSI:
349 e->set = kvm_set_msi; 349 e->set = kvm_set_msi;
350 e->msi.address_lo = ue->u.msi.address_lo; 350 e->msi.address_lo = ue->u.msi.address_lo;
351 e->msi.address_hi = ue->u.msi.address_hi; 351 e->msi.address_hi = ue->u.msi.address_hi;
352 e->msi.data = ue->u.msi.data; 352 e->msi.data = ue->u.msi.data;
353 break; 353 break;
354 default: 354 default:
355 goto out; 355 goto out;
356 } 356 }
357 357
358 hlist_add_head(&e->link, &rt->map[e->gsi]); 358 hlist_add_head(&e->link, &rt->map[e->gsi]);
359 r = 0; 359 r = 0;
360 out: 360 out:
361 return r; 361 return r;
362 } 362 }
363 363
364 364
365 int kvm_set_irq_routing(struct kvm *kvm, 365 int kvm_set_irq_routing(struct kvm *kvm,
366 const struct kvm_irq_routing_entry *ue, 366 const struct kvm_irq_routing_entry *ue,
367 unsigned nr, 367 unsigned nr,
368 unsigned flags) 368 unsigned flags)
369 { 369 {
370 struct kvm_irq_routing_table *new, *old; 370 struct kvm_irq_routing_table *new, *old;
371 u32 i, j, nr_rt_entries = 0; 371 u32 i, j, nr_rt_entries = 0;
372 int r; 372 int r;
373 373
374 for (i = 0; i < nr; ++i) { 374 for (i = 0; i < nr; ++i) {
375 if (ue[i].gsi >= KVM_MAX_IRQ_ROUTES) 375 if (ue[i].gsi >= KVM_MAX_IRQ_ROUTES)
376 return -EINVAL; 376 return -EINVAL;
377 nr_rt_entries = max(nr_rt_entries, ue[i].gsi); 377 nr_rt_entries = max(nr_rt_entries, ue[i].gsi);
378 } 378 }
379 379
380 nr_rt_entries += 1; 380 nr_rt_entries += 1;
381 381
382 new = kzalloc(sizeof(*new) + (nr_rt_entries * sizeof(struct hlist_head)) 382 new = kzalloc(sizeof(*new) + (nr_rt_entries * sizeof(struct hlist_head))
383 + (nr * sizeof(struct kvm_kernel_irq_routing_entry)), 383 + (nr * sizeof(struct kvm_kernel_irq_routing_entry)),
384 GFP_KERNEL); 384 GFP_KERNEL);
385 385
386 if (!new) 386 if (!new)
387 return -ENOMEM; 387 return -ENOMEM;
388 388
389 new->rt_entries = (void *)&new->map[nr_rt_entries]; 389 new->rt_entries = (void *)&new->map[nr_rt_entries];
390 390
391 new->nr_rt_entries = nr_rt_entries; 391 new->nr_rt_entries = nr_rt_entries;
392 for (i = 0; i < 3; i++) 392 for (i = 0; i < 3; i++)
393 for (j = 0; j < KVM_IOAPIC_NUM_PINS; j++) 393 for (j = 0; j < KVM_IOAPIC_NUM_PINS; j++)
394 new->chip[i][j] = -1; 394 new->chip[i][j] = -1;
395 395
396 for (i = 0; i < nr; ++i) { 396 for (i = 0; i < nr; ++i) {
397 r = -EINVAL; 397 r = -EINVAL;
398 if (ue->flags) 398 if (ue->flags)
399 goto out; 399 goto out;
400 r = setup_routing_entry(new, &new->rt_entries[i], ue); 400 r = setup_routing_entry(new, &new->rt_entries[i], ue);
401 if (r) 401 if (r)
402 goto out; 402 goto out;
403 ++ue; 403 ++ue;
404 } 404 }
405 405
406 mutex_lock(&kvm->irq_lock); 406 mutex_lock(&kvm->irq_lock);
407 old = kvm->irq_routing; 407 old = kvm->irq_routing;
408 rcu_assign_pointer(kvm->irq_routing, new); 408 rcu_assign_pointer(kvm->irq_routing, new);
409 mutex_unlock(&kvm->irq_lock); 409 mutex_unlock(&kvm->irq_lock);
410 synchronize_rcu(); 410 synchronize_rcu();
411 411
412 new = old; 412 new = old;
413 r = 0; 413 r = 0;
414 414
415 out: 415 out:
416 kfree(new); 416 kfree(new);
417 return r; 417 return r;
418 } 418 }
419 419
420 #define IOAPIC_ROUTING_ENTRY(irq) \ 420 #define IOAPIC_ROUTING_ENTRY(irq) \
421 { .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP, \ 421 { .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP, \
422 .u.irqchip.irqchip = KVM_IRQCHIP_IOAPIC, .u.irqchip.pin = (irq) } 422 .u.irqchip.irqchip = KVM_IRQCHIP_IOAPIC, .u.irqchip.pin = (irq) }
423 #define ROUTING_ENTRY1(irq) IOAPIC_ROUTING_ENTRY(irq) 423 #define ROUTING_ENTRY1(irq) IOAPIC_ROUTING_ENTRY(irq)
424 424
425 #ifdef CONFIG_X86 425 #ifdef CONFIG_X86
426 # define PIC_ROUTING_ENTRY(irq) \ 426 # define PIC_ROUTING_ENTRY(irq) \
427 { .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP, \ 427 { .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP, \
428 .u.irqchip.irqchip = SELECT_PIC(irq), .u.irqchip.pin = (irq) % 8 } 428 .u.irqchip.irqchip = SELECT_PIC(irq), .u.irqchip.pin = (irq) % 8 }
429 # define ROUTING_ENTRY2(irq) \ 429 # define ROUTING_ENTRY2(irq) \
430 IOAPIC_ROUTING_ENTRY(irq), PIC_ROUTING_ENTRY(irq) 430 IOAPIC_ROUTING_ENTRY(irq), PIC_ROUTING_ENTRY(irq)
431 #else 431 #else
432 # define ROUTING_ENTRY2(irq) \ 432 # define ROUTING_ENTRY2(irq) \
433 IOAPIC_ROUTING_ENTRY(irq) 433 IOAPIC_ROUTING_ENTRY(irq)
434 #endif 434 #endif
435 435
436 static const struct kvm_irq_routing_entry default_routing[] = { 436 static const struct kvm_irq_routing_entry default_routing[] = {
437 ROUTING_ENTRY2(0), ROUTING_ENTRY2(1), 437 ROUTING_ENTRY2(0), ROUTING_ENTRY2(1),
438 ROUTING_ENTRY2(2), ROUTING_ENTRY2(3), 438 ROUTING_ENTRY2(2), ROUTING_ENTRY2(3),
439 ROUTING_ENTRY2(4), ROUTING_ENTRY2(5), 439 ROUTING_ENTRY2(4), ROUTING_ENTRY2(5),
440 ROUTING_ENTRY2(6), ROUTING_ENTRY2(7), 440 ROUTING_ENTRY2(6), ROUTING_ENTRY2(7),
441 ROUTING_ENTRY2(8), ROUTING_ENTRY2(9), 441 ROUTING_ENTRY2(8), ROUTING_ENTRY2(9),
442 ROUTING_ENTRY2(10), ROUTING_ENTRY2(11), 442 ROUTING_ENTRY2(10), ROUTING_ENTRY2(11),
443 ROUTING_ENTRY2(12), ROUTING_ENTRY2(13), 443 ROUTING_ENTRY2(12), ROUTING_ENTRY2(13),
444 ROUTING_ENTRY2(14), ROUTING_ENTRY2(15), 444 ROUTING_ENTRY2(14), ROUTING_ENTRY2(15),
445 ROUTING_ENTRY1(16), ROUTING_ENTRY1(17), 445 ROUTING_ENTRY1(16), ROUTING_ENTRY1(17),
446 ROUTING_ENTRY1(18), ROUTING_ENTRY1(19), 446 ROUTING_ENTRY1(18), ROUTING_ENTRY1(19),
447 ROUTING_ENTRY1(20), ROUTING_ENTRY1(21), 447 ROUTING_ENTRY1(20), ROUTING_ENTRY1(21),
448 ROUTING_ENTRY1(22), ROUTING_ENTRY1(23), 448 ROUTING_ENTRY1(22), ROUTING_ENTRY1(23),
449 #ifdef CONFIG_IA64 449 #ifdef CONFIG_IA64
450 ROUTING_ENTRY1(24), ROUTING_ENTRY1(25), 450 ROUTING_ENTRY1(24), ROUTING_ENTRY1(25),
451 ROUTING_ENTRY1(26), ROUTING_ENTRY1(27), 451 ROUTING_ENTRY1(26), ROUTING_ENTRY1(27),
452 ROUTING_ENTRY1(28), ROUTING_ENTRY1(29), 452 ROUTING_ENTRY1(28), ROUTING_ENTRY1(29),
453 ROUTING_ENTRY1(30), ROUTING_ENTRY1(31), 453 ROUTING_ENTRY1(30), ROUTING_ENTRY1(31),
454 ROUTING_ENTRY1(32), ROUTING_ENTRY1(33), 454 ROUTING_ENTRY1(32), ROUTING_ENTRY1(33),
455 ROUTING_ENTRY1(34), ROUTING_ENTRY1(35), 455 ROUTING_ENTRY1(34), ROUTING_ENTRY1(35),
456 ROUTING_ENTRY1(36), ROUTING_ENTRY1(37), 456 ROUTING_ENTRY1(36), ROUTING_ENTRY1(37),
457 ROUTING_ENTRY1(38), ROUTING_ENTRY1(39), 457 ROUTING_ENTRY1(38), ROUTING_ENTRY1(39),
458 ROUTING_ENTRY1(40), ROUTING_ENTRY1(41), 458 ROUTING_ENTRY1(40), ROUTING_ENTRY1(41),
459 ROUTING_ENTRY1(42), ROUTING_ENTRY1(43), 459 ROUTING_ENTRY1(42), ROUTING_ENTRY1(43),
460 ROUTING_ENTRY1(44), ROUTING_ENTRY1(45), 460 ROUTING_ENTRY1(44), ROUTING_ENTRY1(45),
461 ROUTING_ENTRY1(46), ROUTING_ENTRY1(47), 461 ROUTING_ENTRY1(46), ROUTING_ENTRY1(47),
462 #endif 462 #endif
463 }; 463 };
464 464
465 int kvm_setup_default_irq_routing(struct kvm *kvm) 465 int kvm_setup_default_irq_routing(struct kvm *kvm)
466 { 466 {
467 return kvm_set_irq_routing(kvm, default_routing, 467 return kvm_set_irq_routing(kvm, default_routing,
468 ARRAY_SIZE(default_routing), 0); 468 ARRAY_SIZE(default_routing), 0);
469 } 469 }
470 470