X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_intr.c;h=e29285a6fb30aa4c668ac2fc5b23d11f376c6a61;hb=18cc68af5caa15264a853167e9d2d885cb79317a;hp=801e4147f0a8812a064cbee2de562317442a8bce;hpb=c34c7a69079dd6165db965454104f20c7d873c20;p=palacios.git diff --git a/palacios/src/palacios/vmm_intr.c b/palacios/src/palacios/vmm_intr.c index 801e414..e29285a 100644 --- a/palacios/src/palacios/vmm_intr.c +++ b/palacios/src/palacios/vmm_intr.c @@ -1,94 +1,248 @@ +/* + * 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 + +#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 init_interrupt_state(struct guest_info * info) { - info->intr_state.excp_pending = 0; - info->intr_state.excp_num = 0; - info->intr_state.excp_error_code = 0; - info->vm_ops.raise_irq = &raise_irq; +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 set_intr_controller(struct guest_info * info, struct intr_ctrl_ops * ops, void * state) { - info->intr_state.controller = ops; - info->intr_state.controller_state = state; +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)); + } -int raise_exception(struct guest_info * info, uint_t excp) { - /* 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; - } - 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]; } -int raise_irq(struct guest_info * info, int irq, int error_code) { - // Look up PIC and resend - V3_ASSERT(info); - V3_ASSERT(info->intr_state.controller); - V3_ASSERT(info->intr_state.controller->raise_intr); - - // if ((info->intr_state.controller) && - // (info->intr_state.controller->raise_intr)) { - info->intr_state.controller->raise_intr(info->intr_state.controller_state, irq, error_code); - //} else { - // PrintDebug("There is no registered Interrupt Controller... (NULL POINTER)\n"); - // return -1; - //} - return 0; +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; + } } -int intr_pending(struct vm_intr * intr) { - if (intr->excp_pending) { - return 1; - } else if (intr->controller->intr_pending(intr->controller_state)) { - return 1; - } - /* Check [A]PIC */ +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 0; + 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); -uint_t get_intr_number(struct vm_intr * intr) { - if (intr->excp_pending) { - return intr->excp_num; - } else if (intr->controller->intr_pending(intr->controller_state)) { - return intr->controller->get_intr_number(intr->controller_state) + 32; - } + 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; + } +} - /* someway to get the [A]PIC intr */ - 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); } -uint_t get_intr_type(struct vm_intr * intr) { - if (intr->excp_pending) { - return EXCEPTION; - } else if (intr->controller->intr_pending(intr->controller_state)) { - return EXTERNAL_IRQ; - } - return INVALID_INTR; + + + + + + +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 hook_irq(struct guest_info * info, int irq) { - extern struct vmm_os_hooks * os_hooks; +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 os_hooks->hook_interrupt(info, irq); + return 0; }