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>
26 #ifndef DEBUG_INTERRUPTS
28 #define PrintDebug(fmt, args...)
34 struct intr_controller {
35 struct intr_ctrl_ops * ctrl_ops;
38 struct list_head ctrl_node;
42 void v3_init_interrupt_state(struct guest_info * info) {
43 info->intr_state.excp_pending = 0;
44 info->intr_state.excp_num = 0;
45 info->intr_state.excp_error_code = 0;
47 INIT_LIST_HEAD(&(info->intr_state.controller_list));
49 memset((uchar_t *)(info->intr_state.hooks), 0, sizeof(struct v3_irq_hook *) * 256);
52 void v3_register_intr_controller(struct guest_info * info, struct intr_ctrl_ops * ops, void * state) {
53 struct intr_controller * ctrlr = (struct intr_controller *)V3_Malloc(sizeof(struct intr_controller));
55 ctrlr->priv_data = state;
56 ctrlr->ctrl_ops = ops;
58 list_add(&(ctrlr->ctrl_node), &(info->intr_state.controller_list));
65 static inline struct v3_irq_hook * get_irq_hook(struct guest_info * info, uint_t irq) {
66 V3_ASSERT(irq <= 256);
67 return info->intr_state.hooks[irq];
71 int v3_hook_irq(struct guest_info * info,
73 int (*handler)(struct guest_info * info, struct v3_interrupt * intr, void * priv_data),
76 struct v3_irq_hook * hook = (struct v3_irq_hook *)V3_Malloc(sizeof(struct v3_irq_hook));
82 if (get_irq_hook(info, irq) != NULL) {
83 PrintError("IRQ %d already hooked\n", irq);
87 hook->handler = handler;
88 hook->priv_data = priv_data;
90 info->intr_state.hooks[irq] = hook;
92 if (V3_Hook_Interrupt(info, irq)) {
93 PrintError("hook_irq: failed to hook irq %d\n", irq);
96 PrintDebug("hook_irq: hooked irq %d\n", irq);
103 static int passthrough_irq_handler(struct guest_info * info, struct v3_interrupt * intr, void * priv_data) {
105 if (intr->should_ack == 1) {
106 V3_ACK_IRQ(intr->irq);
109 PrintDebug("[passthrough_irq_handler] raise_irq=%d (guest=0x%p)\n",
110 intr->irq, (void *)info);
112 return v3_raise_irq(info, intr->irq);
115 int v3_hook_passthrough_irq(struct guest_info * info, uint_t irq) {
116 int rc = v3_hook_irq(info, irq, passthrough_irq_handler, NULL);
119 PrintError("guest_irq_injection: failed to hook irq 0x%x (guest=0x%p)\n", irq, (void *)info);
122 PrintDebug("guest_irq_injection: hooked irq 0x%x (guest=0x%p)\n", irq, (void *)info);
131 int v3_deliver_irq(struct guest_info * info, struct v3_interrupt * intr) {
132 PrintDebug("v3_deliver_irq: irq=%d state=0x%p, \n", intr->irq, (void *)intr);
134 struct v3_irq_hook * hook = get_irq_hook(info, intr->irq);
137 PrintError("Attempting to deliver interrupt to non registered hook(irq=%d)\n", intr->irq);
141 return hook->handler(info, intr, hook->priv_data);
151 int v3_raise_exception_with_error(struct guest_info * info, uint_t excp, uint_t error_code) {
152 struct v3_intr_state * intr_state = &(info->intr_state);
154 if (intr_state->excp_pending == 0) {
155 intr_state->excp_pending = 1;
156 intr_state->excp_num = excp;
157 intr_state->excp_error_code = error_code;
158 intr_state->excp_error_code_valid = 1;
159 PrintDebug("[v3_raise_exception_with_error] error code: %x\n", error_code);
161 PrintError("exception already pending, currently not implemented\n");
168 int v3_raise_exception(struct guest_info * info, uint_t excp) {
169 struct v3_intr_state * intr_state = &(info->intr_state);
170 PrintDebug("[v3_raise_exception]\n");
171 if (intr_state->excp_pending == 0) {
172 intr_state->excp_pending = 1;
173 intr_state->excp_num = excp;
174 intr_state->excp_error_code = 0;
175 intr_state->excp_error_code_valid = 0;
177 PrintError("exception already pending, currently not implemented\n");
185 int v3_lower_irq(struct guest_info * info, int irq) {
186 struct intr_controller * ctrl = NULL;
187 struct v3_intr_state * intr_state = &(info->intr_state);
189 PrintDebug("[v3_lower_irq]\n");
191 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
192 ctrl->ctrl_ops->lower_intr(ctrl->priv_data, irq);
198 int v3_raise_irq(struct guest_info * info, int irq) {
199 struct intr_controller * ctrl = NULL;
200 struct v3_intr_state * intr_state = &(info->intr_state);
202 PrintDebug("[v3_raise_irq (%d)]\n", irq);
204 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
205 ctrl->ctrl_ops->raise_intr(ctrl->priv_data, irq);
213 int v3_intr_pending(struct guest_info * info) {
214 struct v3_intr_state * intr_state = &(info->intr_state);
216 // PrintDebug("[intr_pending]\n");
217 if (intr_state->excp_pending == 1) {
220 struct intr_controller * ctrl = NULL;
222 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
223 if (ctrl->ctrl_ops->intr_pending(ctrl->priv_data) == 1) {
233 uint_t v3_get_intr_number(struct guest_info * info) {
234 struct v3_intr_state * intr_state = &(info->intr_state);
236 if (intr_state->excp_pending == 1) {
237 return intr_state->excp_num;
239 struct intr_controller * ctrl = NULL;
241 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
242 if (ctrl->ctrl_ops->intr_pending(ctrl->priv_data)) {
243 uint_t intr_num = ctrl->ctrl_ops->get_intr_number(ctrl->priv_data);
245 PrintDebug("[get_intr_number] intr_number = %d\n", intr_num);
256 intr_type_t v3_get_intr_type(struct guest_info * info) {
257 struct v3_intr_state * intr_state = &(info->intr_state);
259 if (intr_state->excp_pending) {
260 PrintDebug("[get_intr_type] Exception\n");
263 struct intr_controller * ctrl = NULL;
265 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
266 if (ctrl->ctrl_ops->intr_pending(ctrl->priv_data) == 1) {
267 PrintDebug("[get_intr_type] External_irq\n");
273 PrintDebug("[get_intr_type] Invalid_Intr\n");
282 int v3_injecting_intr(struct guest_info * info, uint_t intr_num, intr_type_t type) {
283 struct v3_intr_state * intr_state = &(info->intr_state);
285 if (type == EXCEPTION) {
286 PrintDebug("[injecting_intr] Exception\n");
287 intr_state->excp_pending = 0;
288 intr_state->excp_num = 0;
289 intr_state->excp_error_code = 0;
290 intr_state->excp_error_code_valid = 0;
292 } else if (type == EXTERNAL_IRQ) {
293 struct intr_controller * ctrl = NULL;
295 PrintDebug("[injecting_intr] External_Irq with intr_num = %x\n", intr_num);
296 list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
297 ctrl->ctrl_ops->begin_irq(ctrl->priv_data, intr_num);