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 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));
65 void v3_init_intr_routers(struct v3_vm_info * vm) {
67 INIT_LIST_HEAD(&(vm->intr_routers.router_list));
69 v3_lock_init(&(vm->intr_routers.irq_lock));
71 memset((uchar_t *)(vm->intr_routers.hooks), 0, sizeof(struct v3_irq_hook *) * 256);
75 int v3_register_intr_controller(struct guest_info * info, struct intr_ctrl_ops * ops, void * priv_data) {
76 struct intr_controller * ctrlr = (struct intr_controller *)V3_Malloc(sizeof(struct intr_controller));
78 ctrlr->priv_data = priv_data;
79 ctrlr->ctrl_ops = ops;
81 list_add(&(ctrlr->ctrl_node), &(info->intr_core_state.controller_list));
86 int v3_register_intr_router(struct v3_vm_info * vm, struct intr_router_ops * ops, void * priv_data) {
87 struct intr_router * router = (struct intr_router *)V3_Malloc(sizeof(struct intr_router));
89 router->priv_data = priv_data;
90 router->router_ops = ops;
92 list_add(&(router->router_node), &(vm->intr_routers.router_list));
99 static inline struct v3_irq_hook * get_irq_hook(struct v3_vm_info * vm, uint_t irq) {
100 V3_ASSERT(irq <= 256);
101 return vm->intr_routers.hooks[irq];
105 int v3_hook_irq(struct v3_vm_info * vm,
107 int (*handler)(struct v3_vm_info * vm, struct v3_interrupt * intr, void * priv_data),
110 struct v3_irq_hook * hook = (struct v3_irq_hook *)V3_Malloc(sizeof(struct v3_irq_hook));
116 if (get_irq_hook(vm, irq) != NULL) {
117 PrintError("IRQ %d already hooked\n", irq);
121 hook->handler = handler;
122 hook->priv_data = priv_data;
124 vm->intr_routers.hooks[irq] = hook;
126 if (V3_Hook_Interrupt(vm, irq)) {
127 PrintError("hook_irq: failed to hook irq %d\n", irq);
130 PrintDebug("hook_irq: hooked irq %d\n", irq);
137 static int passthrough_irq_handler(struct v3_vm_info * vm, struct v3_interrupt * intr, void * priv_data) {
138 PrintDebug("[passthrough_irq_handler] raise_irq=%d (guest=0x%p)\n",
139 intr->irq, (void *)vm);
141 return v3_raise_irq(vm, intr->irq);
144 int v3_hook_passthrough_irq(struct v3_vm_info * vm, uint_t irq) {
145 int rc = v3_hook_irq(vm, irq, passthrough_irq_handler, NULL);
148 PrintError("guest_irq_injection: failed to hook irq 0x%x (guest=0x%p)\n", irq, (void *)vm);
151 PrintDebug("guest_irq_injection: hooked irq 0x%x (guest=0x%p)\n", irq, (void *)vm);
160 int v3_deliver_irq(struct v3_vm_info * vm, struct v3_interrupt * intr) {
161 PrintDebug("v3_deliver_irq: irq=%d state=0x%p, \n", intr->irq, (void *)intr);
163 struct v3_irq_hook * hook = get_irq_hook(vm, intr->irq);
166 PrintError("Attempting to deliver interrupt to non registered hook(irq=%d)\n", intr->irq);
170 return hook->handler(vm, intr, hook->priv_data);
177 int v3_raise_virq(struct guest_info * info, int irq) {
178 struct v3_intr_core_state * intr_state = &(info->intr_core_state);
182 intr_state->virq_map[major] |= (1 << minor);
187 int v3_lower_virq(struct guest_info * info, int irq) {
188 struct v3_intr_core_state * intr_state = &(info->intr_core_state);
192 intr_state->virq_map[major] &= ~(1 << minor);
198 int v3_lower_irq(struct v3_vm_info * vm, int irq) {
199 struct intr_router * router = NULL;
200 struct v3_intr_routers * routers = &(vm->intr_routers);
202 // PrintDebug("[v3_lower_irq]\n");
203 addr_t irq_state = v3_lock_irqsave(routers->irq_lock);
205 list_for_each_entry(router, &(routers->router_list), router_node) {
206 router->router_ops->lower_intr(vm, router->priv_data, irq);
209 v3_unlock_irqrestore(routers->irq_lock, irq_state);
214 int v3_raise_irq(struct v3_vm_info * vm, int irq) {
215 struct intr_router * router = NULL;
216 struct v3_intr_routers * routers = &(vm->intr_routers);
218 // PrintDebug("[v3_raise_irq (%d)]\n", irq);
219 addr_t irq_state = v3_lock_irqsave(routers->irq_lock);
221 list_for_each_entry(router, &(routers->router_list), router_node) {
222 router->router_ops->raise_intr(vm, router->priv_data, irq);
225 v3_unlock_irqrestore(routers->irq_lock, irq_state);
232 v3_intr_type_t v3_intr_pending(struct guest_info * info) {
233 struct v3_intr_core_state * intr_state = &(info->intr_core_state);
234 struct intr_controller * ctrl = NULL;
235 int ret = V3_INVALID_INTR;
238 // PrintDebug("[intr_pending]\n");
239 addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock);
241 // VIRQs have priority
242 for (i = 0; i < MAX_IRQ / 8; i++) {
243 if (intr_state->virq_map[i] != 0) {
244 ret = V3_VIRTUAL_IRQ;
249 if (ret == V3_INVALID_INTR) {
250 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
251 if (ctrl->ctrl_ops->intr_pending(info, ctrl->priv_data) == 1) {
252 ret = V3_EXTERNAL_IRQ;
258 v3_unlock_irqrestore(intr_state->irq_lock, irq_state);
264 uint32_t v3_get_intr(struct guest_info * info) {
265 struct v3_intr_core_state * intr_state = &(info->intr_core_state);
266 struct intr_controller * ctrl = NULL;
271 addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock);
273 // virqs have priority
274 for (i = 0; i < MAX_IRQ / 8; i++) {
275 if (intr_state->virq_map[i] != 0) {
276 for (j = 0; j < 8; j++) {
277 if (intr_state->virq_map[i] & (1 << j)) {
287 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
288 if (ctrl->ctrl_ops->intr_pending(info, ctrl->priv_data)) {
289 uint_t intr_num = ctrl->ctrl_ops->get_intr_number(info, ctrl->priv_data);
291 // PrintDebug("[get_intr_number] intr_number = %d\n", intr_num);
298 v3_unlock_irqrestore(intr_state->irq_lock, irq_state);
304 intr_type_t v3_get_intr_type(struct guest_info * info) {
305 struct v3_intr_state * intr_state = &(info->intr_state);
306 struct intr_controller * ctrl = NULL;
307 intr_type_t type = V3_INVALID_INTR;
309 addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock);
311 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
312 if (ctrl->ctrl_ops->intr_pending(ctrl->priv_data) == 1) {
313 //PrintDebug("[get_intr_type] External_irq\n");
314 type = V3_EXTERNAL_IRQ;
319 #ifdef CONFIG_DEBUG_INTERRUPTS
320 if (type == V3_INVALID_INTR) {
321 PrintError("[get_intr_type] Invalid_Intr\n");
325 v3_unlock_irqrestore(intr_state->irq_lock, irq_state);
335 int v3_injecting_intr(struct guest_info * info, uint_t intr_num, v3_intr_type_t type) {
336 struct v3_intr_core_state * intr_state = &(info->intr_core_state);
338 if (type == V3_EXTERNAL_IRQ) {
339 struct intr_controller * ctrl = NULL;
341 addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock);
343 // PrintDebug("[injecting_intr] External_Irq with intr_num = %x\n", intr_num);
344 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
345 ctrl->ctrl_ops->begin_irq(info, ctrl->priv_data, intr_num);
348 v3_unlock_irqrestore(intr_state->irq_lock, irq_state);