2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
21 #include <palacios/vmm_intr.h>
22 #include <palacios/vmm.h>
24 #include <palacios/vm_guest.h>
25 #include <palacios/vmm_ctrl_regs.h>
27 #include <palacios/vmm_lock.h>
29 #ifndef V3_CONFIG_DEBUG_INTERRUPTS
31 #define PrintDebug(fmt, args...)
37 struct intr_controller {
38 struct intr_ctrl_ops * ctrl_ops;
41 struct list_head ctrl_node;
46 struct intr_router_ops * router_ops;
49 struct list_head router_node;
53 void v3_init_intr_controllers(struct guest_info * info) {
54 struct v3_intr_core_state * intr_state = &(info->intr_core_state);
56 intr_state->irq_pending = 0;
57 intr_state->irq_started = 0;
58 intr_state->irq_vector = 0;
60 v3_lock_init(&(intr_state->irq_lock));
62 INIT_LIST_HEAD(&(intr_state->controller_list));
66 void v3_deinit_intr_controllers(struct guest_info * core) {
67 struct v3_intr_core_state * intr_state = &(core->intr_core_state);
68 struct intr_controller * ctrlr;
69 struct intr_controller * tmp;
71 // clear out any controllers that were left around
72 list_for_each_entry_safe(ctrlr, tmp, &(intr_state->controller_list), ctrl_node) {
73 v3_remove_intr_controller(core, ctrlr);
76 v3_lock_deinit(&(intr_state->irq_lock));
81 void v3_init_intr_routers(struct v3_vm_info * vm) {
83 INIT_LIST_HEAD(&(vm->intr_routers.router_list));
85 v3_lock_init(&(vm->intr_routers.irq_lock));
87 memset((uchar_t *)(vm->intr_routers.hooks), 0, sizeof(struct v3_irq_hook *) * 256);
91 void v3_deinit_intr_routers(struct v3_vm_info * vm) {
92 struct intr_router * rtr = NULL;
93 struct intr_router * tmp = NULL;
95 // clear out any controllers that were left around
96 list_for_each_entry_safe(rtr, tmp, &(vm->intr_routers.router_list), router_node) {
97 v3_remove_intr_router(vm, rtr);
100 v3_lock_deinit(&(vm->intr_routers.irq_lock));
103 void * v3_register_intr_controller(struct guest_info * info, struct intr_ctrl_ops * ops, void * priv_data) {
104 struct intr_controller * ctrlr = (struct intr_controller *)V3_Malloc(sizeof(struct intr_controller));
107 PrintError(info->vm_info, info, "Cannot allocate in registering an interrupt controller\n");
111 ctrlr->priv_data = priv_data;
112 ctrlr->ctrl_ops = ops;
114 list_add(&(ctrlr->ctrl_node), &(info->intr_core_state.controller_list));
116 return (void *)ctrlr;
119 void v3_remove_intr_controller(struct guest_info * core, void * handle) {
120 struct v3_intr_core_state * intr_state = &(core->intr_core_state);
121 struct intr_controller * ctrlr = handle;
122 struct intr_controller * tmp = NULL;
125 // search for the entry in the router list
126 list_for_each_entry(tmp, &(intr_state->controller_list), ctrl_node) {
133 PrintError(core->vm_info, core, "Attempted to remove invalid interrupt controller handle\n");
137 list_del(&(ctrlr->ctrl_node));
141 void * v3_register_intr_router(struct v3_vm_info * vm, struct intr_router_ops * ops, void * priv_data) {
142 struct intr_router * router = (struct intr_router *)V3_Malloc(sizeof(struct intr_router));
145 PrintError(vm, VCORE_NONE,"Cannot allocate in registering an interrupt router\n");
149 router->priv_data = priv_data;
150 router->router_ops = ops;
152 list_add(&(router->router_node), &(vm->intr_routers.router_list));
154 return (void *)router;
157 void v3_remove_intr_router(struct v3_vm_info * vm, void * handle) {
158 struct intr_router * router = handle;
159 struct intr_router * tmp = NULL;
162 // search for the entry in the router list
163 list_for_each_entry(tmp, &(vm->intr_routers.router_list), router_node) {
170 PrintError(vm, VCORE_NONE, "Attempted to remove invalid interrupt router\n");
174 list_del(&(router->router_node));
180 static inline struct v3_irq_hook * get_irq_hook(struct v3_vm_info * vm, uint_t irq) {
181 V3_ASSERT(vm, VCORE_NONE,irq <= 256);
182 return vm->intr_routers.hooks[irq];
186 int v3_hook_irq(struct v3_vm_info * vm,
188 int (*handler)(struct v3_vm_info * vm, struct v3_interrupt * intr, void * priv_data),
191 struct v3_irq_hook * hook = (struct v3_irq_hook *)V3_Malloc(sizeof(struct v3_irq_hook));
195 PrintError(vm, VCORE_NONE, "Cannot allocate when hooking an irq\n");
199 if (get_irq_hook(vm, irq) != NULL) {
200 PrintError(vm, VCORE_NONE, "IRQ %d already hooked\n", irq);
205 hook->handler = handler;
206 hook->priv_data = priv_data;
208 vm->intr_routers.hooks[irq] = hook;
210 if (V3_Hook_Interrupt(vm, irq)) {
211 PrintError(vm, VCORE_NONE, "hook_irq: failed to hook irq %d\n", irq);
212 vm->intr_routers.hooks[irq] = NULL;
216 PrintDebug(vm, VCORE_NONE, "hook_irq: hooked irq %d\n", irq);
223 static int passthrough_irq_handler(struct v3_vm_info * vm, struct v3_interrupt * intr, void * priv_data) {
224 PrintDebug(vm, VCORE_NONE, "[passthrough_irq_handler] raise_irq=%d (guest=0x%p)\n",
225 intr->irq, (void *)vm);
227 return v3_raise_irq(vm, intr->irq);
230 int v3_hook_passthrough_irq(struct v3_vm_info * vm, uint_t irq) {
231 int rc = v3_hook_irq(vm, irq, passthrough_irq_handler, NULL);
234 PrintError(vm, VCORE_NONE, "guest_irq_injection: failed to hook irq 0x%x (guest=0x%p)\n", irq, (void *)vm);
237 PrintDebug(vm, VCORE_NONE, "guest_irq_injection: hooked irq 0x%x (guest=0x%p)\n", irq, (void *)vm);
246 int v3_deliver_irq(struct v3_vm_info * vm, struct v3_interrupt * intr) {
247 PrintDebug(vm, VCORE_NONE, "v3_deliver_irq: irq=%d state=0x%p, \n", intr->irq, (void *)intr);
249 struct v3_irq_hook * hook = get_irq_hook(vm, intr->irq);
252 PrintError(vm, VCORE_NONE, "Attempting to deliver interrupt to non registered hook(irq=%d)\n", intr->irq);
256 return hook->handler(vm, intr, hook->priv_data);
262 int v3_raise_swintr (struct guest_info * core, uint8_t vector) {
263 struct v3_intr_core_state * intr_state = &(core->intr_core_state);
265 PrintDebug(core->vm_info, core, "Signaling software interrupt in v3_signal_swintr()\n");
266 PrintDebug(core->vm_info, core, "\tINT vector: %d\n", vector);
268 intr_state->swintr_posted = 1;
269 intr_state->swintr_vector = vector;
275 int v3_raise_virq(struct guest_info * info, int irq) {
276 struct v3_intr_core_state * intr_state = &(info->intr_core_state);
280 intr_state->virq_map[major] |= (1 << minor);
285 int v3_lower_virq(struct guest_info * info, int irq) {
286 struct v3_intr_core_state * intr_state = &(info->intr_core_state);
290 intr_state->virq_map[major] &= ~(1 << minor);
296 int v3_lower_irq(struct v3_vm_info * vm, int irq) {
297 struct v3_irq irq_state;
300 irq_state.ack = NULL;
301 irq_state.private_data = NULL;
303 return v3_lower_acked_irq(vm, irq_state);
306 int v3_raise_irq(struct v3_vm_info * vm, int irq) {
307 struct v3_irq irq_state;
310 irq_state.ack = NULL;
311 irq_state.private_data = NULL;
313 return v3_raise_acked_irq(vm, irq_state);
317 int v3_raise_acked_irq(struct v3_vm_info * vm, struct v3_irq irq) {
318 struct intr_router * router = NULL;
319 struct v3_intr_routers * routers = &(vm->intr_routers);
321 // PrintDebug(info->vm_info, info, "[v3_raise_irq (%d)]\n", irq);
322 addr_t irq_state = v3_lock_irqsave(routers->irq_lock);
324 list_for_each_entry(router, &(routers->router_list), router_node) {
325 router->router_ops->raise_intr(vm, router->priv_data, &irq);
328 v3_unlock_irqrestore(routers->irq_lock, irq_state);
334 int v3_lower_acked_irq(struct v3_vm_info * vm, struct v3_irq irq) {
335 struct intr_router * router = NULL;
336 struct v3_intr_routers * routers = &(vm->intr_routers);
338 // PrintDebug(info->vm_info, info, "[v3_lower_irq]\n");
339 addr_t irq_state = v3_lock_irqsave(routers->irq_lock);
341 list_for_each_entry(router, &(routers->router_list), router_node) {
342 router->router_ops->lower_intr(vm, router->priv_data, &irq);
345 v3_unlock_irqrestore(routers->irq_lock, irq_state);
353 void v3_clear_pending_intr(struct guest_info * core) {
354 struct v3_intr_core_state * intr_state = &(core->intr_core_state);
356 intr_state->irq_pending = 0;
361 v3_intr_type_t v3_intr_pending(struct guest_info * info) {
362 struct v3_intr_core_state * intr_state = &(info->intr_core_state);
363 struct intr_controller * ctrl = NULL;
364 int ret = V3_INVALID_INTR;
367 // PrintDebug(info->vm_info, info, "[intr_pending]\n");
368 addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock);
370 // External IRQs have lowest priority
371 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
372 if (ctrl->ctrl_ops->intr_pending(info, ctrl->priv_data) == 1) {
373 ret = V3_EXTERNAL_IRQ;
378 // VIRQs have 2nd priority
379 for (i = 0; i < MAX_IRQ / 8; i++) {
380 if (intr_state->virq_map[i] != 0) {
381 ret = V3_VIRTUAL_IRQ;
386 /* SWINTRs have highest */
387 if (intr_state->swintr_posted == 1) {
388 ret = V3_SOFTWARE_INTR;
391 v3_unlock_irqrestore(intr_state->irq_lock, irq_state);
397 uint32_t v3_get_intr(struct guest_info * info) {
398 struct v3_intr_core_state * intr_state = &(info->intr_core_state);
399 struct intr_controller * ctrl = NULL;
404 addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock);
406 // virqs have priority
407 for (i = 0; i < MAX_IRQ / 8; i++) {
408 if (intr_state->virq_map[i] != 0) {
409 for (j = 0; j < 8; j++) {
410 if (intr_state->virq_map[i] & (1 << j)) {
420 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
421 if (ctrl->ctrl_ops->intr_pending(info, ctrl->priv_data)) {
422 uint_t intr_num = ctrl->ctrl_ops->get_intr_number(info, ctrl->priv_data);
424 // PrintDebug(info->vm_info, info, "[get_intr_number] intr_number = %d\n", intr_num);
431 v3_unlock_irqrestore(intr_state->irq_lock, irq_state);
437 intr_type_t v3_get_intr_type(struct guest_info * info) {
438 struct v3_intr_state * intr_state = &(info->intr_state);
439 struct intr_controller * ctrl = NULL;
440 intr_type_t type = V3_INVALID_INTR;
442 addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock);
444 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
445 if (ctrl->ctrl_ops->intr_pending(ctrl->priv_data) == 1) {
446 //PrintDebug(info->vm_info, info, "[get_intr_type] External_irq\n");
447 type = V3_EXTERNAL_IRQ;
452 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
453 if (type == V3_INVALID_INTR) {
454 PrintError(info->vm_info, info, "[get_intr_type] Invalid_Intr\n");
458 v3_unlock_irqrestore(intr_state->irq_lock, irq_state);
468 int v3_injecting_intr(struct guest_info * info, uint_t intr_num, v3_intr_type_t type) {
469 struct v3_intr_core_state * intr_state = &(info->intr_core_state);
471 if (type == V3_EXTERNAL_IRQ) {
472 struct intr_controller * ctrl = NULL;
474 addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock);
476 // PrintDebug(info->vm_info, info, "[injecting_intr] External_Irq with intr_num = %x\n", intr_num);
477 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
478 ctrl->ctrl_ops->begin_irq(info, ctrl->priv_data, intr_num);
481 v3_unlock_irqrestore(intr_state->irq_lock, irq_state);