+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+
#include <palacios/vmm_intr.h>
+#include <palacios/vmm.h>
+
+#include <palacios/vm_guest.h>
+#include <palacios/vmm_ctrl_regs.h>
+
+#ifndef DEBUG_INTERRUPTS
+#undef PrintDebug
+#define PrintDebug(fmt, args...)
+#endif
+
+
+
+
+struct intr_controller {
+ struct intr_ctrl_ops * ctrl_ops;
+
+ void * priv_data;
+ struct list_head ctrl_node;
+};
+
+
+void v3_init_interrupt_state(struct guest_info * info) {
+
+ info->intr_state.irq_pending = 0;
+ info->intr_state.irq_vector = 0;
+
+ INIT_LIST_HEAD(&(info->intr_state.controller_list));
+
+ memset((uchar_t *)(info->intr_state.hooks), 0, sizeof(struct v3_irq_hook *) * 256);
+}
+
+void v3_register_intr_controller(struct guest_info * info, struct intr_ctrl_ops * ops, void * state) {
+ struct intr_controller * ctrlr = (struct intr_controller *)V3_Malloc(sizeof(struct intr_controller));
+
+ ctrlr->priv_data = state;
+ ctrlr->ctrl_ops = ops;
+
+ list_add(&(ctrlr->ctrl_node), &(info->intr_state.controller_list));
+
+}
+
+
+
+
+static inline struct v3_irq_hook * get_irq_hook(struct guest_info * info, uint_t irq) {
+ V3_ASSERT(irq <= 256);
+ return info->intr_state.hooks[irq];
+}
+
+
+int v3_hook_irq(struct guest_info * info,
+ uint_t irq,
+ int (*handler)(struct guest_info * info, struct v3_interrupt * intr, void * priv_data),
+ void * priv_data)
+{
+ struct v3_irq_hook * hook = (struct v3_irq_hook *)V3_Malloc(sizeof(struct v3_irq_hook));
+
+ if (hook == NULL) {
+ return -1;
+ }
+
+ if (get_irq_hook(info, irq) != NULL) {
+ PrintError("IRQ %d already hooked\n", irq);
+ return -1;
+ }
+
+ hook->handler = handler;
+ hook->priv_data = priv_data;
+
+ info->intr_state.hooks[irq] = hook;
+
+ if (V3_Hook_Interrupt(info, irq)) {
+ PrintError("hook_irq: failed to hook irq %d\n", irq);
+ return -1;
+ } else {
+ PrintDebug("hook_irq: hooked irq %d\n", irq);
+ return 0;
+ }
+}
+
+
+
+static int passthrough_irq_handler(struct guest_info * info, struct v3_interrupt * intr, void * priv_data) {
+ PrintDebug("[passthrough_irq_handler] raise_irq=%d (guest=0x%p)\n",
+ intr->irq, (void *)info);
+
+ return v3_raise_irq(info, intr->irq);
+}
+
+int v3_hook_passthrough_irq(struct guest_info * info, uint_t irq) {
+ int rc = v3_hook_irq(info, irq, passthrough_irq_handler, NULL);
+
+ if (rc) {
+ PrintError("guest_irq_injection: failed to hook irq 0x%x (guest=0x%p)\n", irq, (void *)info);
+ return -1;
+ } else {
+ PrintDebug("guest_irq_injection: hooked irq 0x%x (guest=0x%p)\n", irq, (void *)info);
+ return 0;
+ }
+}
+
+
+
+
+
+int v3_deliver_irq(struct guest_info * info, struct v3_interrupt * intr) {
+ PrintDebug("v3_deliver_irq: irq=%d state=0x%p, \n", intr->irq, (void *)intr);
+
+ struct v3_irq_hook * hook = get_irq_hook(info, intr->irq);
+
+ if (hook == NULL) {
+ PrintError("Attempting to deliver interrupt to non registered hook(irq=%d)\n", intr->irq);
+ return -1;
+ }
+
+ return hook->handler(info, intr, hook->priv_data);
+}
+
+
+
+
+
+
+
+
+
+int v3_lower_irq(struct guest_info * info, int irq) {
+ struct intr_controller * ctrl = NULL;
+ struct v3_intr_state * intr_state = &(info->intr_state);
+
+ // PrintDebug("[v3_lower_irq]\n");
+
+ list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
+ ctrl->ctrl_ops->lower_intr(ctrl->priv_data, irq);
+ }
+
+ return 0;
+}
+
+int v3_raise_irq(struct guest_info * info, int irq) {
+ struct intr_controller * ctrl = NULL;
+ struct v3_intr_state * intr_state = &(info->intr_state);
+
+ // PrintDebug("[v3_raise_irq (%d)]\n", irq);
+
+ list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
+ ctrl->ctrl_ops->raise_intr(ctrl->priv_data, irq);
+ }
+
+ return 0;
+}
+
+
+
+int v3_intr_pending(struct guest_info * info) {
+ struct v3_intr_state * intr_state = &(info->intr_state);
+ struct intr_controller * ctrl = NULL;
+ struct rflags * flags = (struct rflags *)&(info->ctrl_regs.rflags);
+ // PrintDebug("[intr_pending]\n");
+
+ // Check if the guest has interrupts enabled
+ if (flags->intr == 0) {
+ return 0;
+ }
+
+ list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
+ if (ctrl->ctrl_ops->intr_pending(ctrl->priv_data) == 1) {
+ return 1;
+ }
+ }
+
+
+ return 0;
+}
+
+
+uint_t v3_get_intr_number(struct guest_info * info) {
+ struct v3_intr_state * intr_state = &(info->intr_state);
+ struct intr_controller * ctrl = NULL;
+
+ list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
+ if (ctrl->ctrl_ops->intr_pending(ctrl->priv_data)) {
+ uint_t intr_num = ctrl->ctrl_ops->get_intr_number(ctrl->priv_data);
+
+ // PrintDebug("[get_intr_number] intr_number = %d\n", intr_num);
+
+ return intr_num;
+ }
+ }
+ return 0;
+}
+
+
+intr_type_t v3_get_intr_type(struct guest_info * info) {
+ struct v3_intr_state * intr_state = &(info->intr_state);
+ struct intr_controller * ctrl = NULL;
+
+ list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
+ if (ctrl->ctrl_ops->intr_pending(ctrl->priv_data) == 1) {
+ //PrintDebug("[get_intr_type] External_irq\n");
+ return EXTERNAL_IRQ;
+ }
+ }
+
+ PrintError("[get_intr_type] Invalid_Intr\n");
+ return INVALID_INTR;
+}
+
+
+
+
+
+
+int v3_injecting_intr(struct guest_info * info, uint_t intr_num, intr_type_t type) {
+ struct v3_intr_state * intr_state = &(info->intr_state);
+ if (type == EXTERNAL_IRQ) {
+ struct intr_controller * ctrl = NULL;
+ // PrintDebug("[injecting_intr] External_Irq with intr_num = %x\n", intr_num);
+ list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) {
+ ctrl->ctrl_ops->begin_irq(ctrl->priv_data, intr_num);
+ }
+ }
+ return 0;
+}
