X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_intr.c;h=bc36d05cc57c00657d62a1201a6563eefc518cad;hp=657ddef9802af43d8183c971beaeb90a1f37dfb3;hb=888c2dd8a3914f9a08e2b0e006ff96c5cc5cd792;hpb=df58bd3c484a52b1e166dc28e7b9b6fd94e5a023 diff --git a/palacios/src/palacios/vmm_intr.c b/palacios/src/palacios/vmm_intr.c index 657ddef..bc36d05 100644 --- a/palacios/src/palacios/vmm_intr.c +++ b/palacios/src/palacios/vmm_intr.c @@ -1,57 +1,331 @@ -#include +/* + * 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 + * Copyright (c) 2008, The V3VEE Project + * All rights reserved. + * + * Author: Jack Lange + * + * This is free software. You are permitted to use, + * redistribute, and modify it as specified in the file "V3VEE_LICENSE". + */ + +#include +#include #include +#include + +#include + +#ifndef CONFIG_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_started = 0; + info->intr_state.irq_vector = 0; + INIT_LIST_HEAD(&(info->intr_state.controller_list)); -void init_interrupt_state(struct vm_intr * state) { - state->excp_pending = 0; - state->excp_num = 0; - state->excp_error_code = 0; + v3_lock_init(&(info->intr_state.irq_lock)); + + memset((uchar_t *)(info->intr_state.hooks), 0, sizeof(struct v3_irq_hook *) * 256); } -int raise_exception(struct guest_info * info, uint_t excp) { +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; - /* We can't stack exceptions, - but do we need to have some sort of priority? - */ - if (info->intr_state.excp_pending) { - info->intr_state.excp_pending = 1; - info->intr_state.excp_num = excp; - } else { - return -1; - } + list_add(&(ctrlr->ctrl_node), &(info->intr_state.controller_list)); - return 0; } -int intr_pending(struct vm_intr * intr) { - if (intr->excp_pending) { - return 1; - } - /* Check [A]PIC */ - return 0; +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]; } -uint_t get_intr_number(struct vm_intr * intr) { - if (intr->excp_pending) { - return intr->excp_num; - } +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; + } - /* someway to get the [A]PIC intr */ + if (get_irq_hook(info, irq) != NULL) { + PrintError("IRQ %d already hooked\n", irq); + return -1; + } - return 0; + 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; + } } -uint_t get_intr_type(struct vm_intr * intr) { - if (intr->excp_pending) { - return EXCEPTION; - } - return INVALID_INTR; +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_raise_virq(struct guest_info * info, int irq) { + struct v3_intr_state * intr_state = &(info->intr_state); + int major = irq / 8; + int minor = irq % 8; + + intr_state->virq_map[major] |= (1 << minor); + + return 0; +} + +int v3_lower_virq(struct guest_info * info, int irq) { + struct v3_intr_state * intr_state = &(info->intr_state); + int major = irq / 8; + int minor = irq % 8; + + intr_state->virq_map[major] &= ~(1 << minor); + + return 0; +} + + +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"); + addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock); + + list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) { + ctrl->ctrl_ops->lower_intr(info, ctrl->priv_data, irq); + } + + v3_unlock_irqrestore(intr_state->irq_lock, irq_state); + + 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); + addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock); + + list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) { + ctrl->ctrl_ops->raise_intr(info, ctrl->priv_data, irq); + } + + v3_unlock_irqrestore(intr_state->irq_lock, irq_state); + + return 0; +} + + +void v3_clear_pending_intr(struct guest_info * core) { + struct v3_intr_state * intr_state = &(core->intr_state); + + intr_state->irq_pending = 0; + +} + + +v3_intr_type_t v3_intr_pending(struct guest_info * info) { + struct v3_intr_state * intr_state = &(info->intr_state); + struct intr_controller * ctrl = NULL; + int ret = V3_INVALID_INTR; + int i = 0; + + // PrintDebug("[intr_pending]\n"); + addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock); + + // VIRQs have priority + for (i = 0; i < MAX_IRQ / 8; i++) { + if (intr_state->virq_map[i] != 0) { + ret = V3_VIRTUAL_IRQ; + break; + } + } + + if (ret == V3_INVALID_INTR) { + list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) { + if (ctrl->ctrl_ops->intr_pending(info, ctrl->priv_data) == 1) { + ret = V3_EXTERNAL_IRQ; + break; + } + } + } + + v3_unlock_irqrestore(intr_state->irq_lock, irq_state); + + return ret; +} + + +uint32_t v3_get_intr(struct guest_info * info) { + struct v3_intr_state * intr_state = &(info->intr_state); + struct intr_controller * ctrl = NULL; + uint_t ret = 0; + int i = 0; + int j = 0; + + addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock); + + // virqs have priority + for (i = 0; i < MAX_IRQ / 8; i++) { + if (intr_state->virq_map[i] != 0) { + for (j = 0; j < 8; j++) { + if (intr_state->virq_map[i] & (1 << j)) { + ret = (i * 8) + j; + break; + } + } + break; + } + } + + if (!ret) { + list_for_each_entry(ctrl, &(intr_state->controller_list), ctrl_node) { + if (ctrl->ctrl_ops->intr_pending(info, ctrl->priv_data)) { + uint_t intr_num = ctrl->ctrl_ops->get_intr_number(info, ctrl->priv_data); + + // PrintDebug("[get_intr_number] intr_number = %d\n", intr_num); + ret = intr_num; + break; + } + } + } + + v3_unlock_irqrestore(intr_state->irq_lock, irq_state); + + return ret; +} + +/* +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; + intr_type_t type = V3_INVALID_INTR; + + addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock); + + 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"); + type = V3_EXTERNAL_IRQ; + break; + } + } + +#ifdef CONFIG_DEBUG_INTERRUPTS + if (type == V3_INVALID_INTR) { + PrintError("[get_intr_type] Invalid_Intr\n"); + } +#endif + + v3_unlock_irqrestore(intr_state->irq_lock, irq_state); + + return type; +} +*/ + + + + + +int v3_injecting_intr(struct guest_info * info, uint_t intr_num, v3_intr_type_t type) { + struct v3_intr_state * intr_state = &(info->intr_state); + + if (type == V3_EXTERNAL_IRQ) { + struct intr_controller * ctrl = NULL; + + addr_t irq_state = v3_lock_irqsave(intr_state->irq_lock); + + // 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(info, ctrl->priv_data, intr_num); + } + + v3_unlock_irqrestore(intr_state->irq_lock, irq_state); + } + + return 0; }