X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_intr.c;h=46e2c70772f16dc425848d2a58462d3326b3298b;hb=95183ed0c20c9280fb109b668033c42e0b8e3d22;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..46e2c70 100644 --- a/palacios/src/palacios/vmm_intr.c +++ b/palacios/src/palacios/vmm_intr.c @@ -1,94 +1,548 @@ +/* + * 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 +#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; +}; + + +struct intr_router { + struct intr_router_ops * router_ops; + + void * priv_data; + struct list_head router_node; + +}; + + + +void v3_init_intr_controllers(struct guest_info * info) { + struct v3_intr_core_state * intr_state = &(info->intr_core_state); + + intr_state->irq_pending = 0; + intr_state->irq_started = 0; + intr_state->irq_vector = 0; + + v3_lock_init(&(intr_state->irq_lock)); + + INIT_LIST_HEAD(&(intr_state->controller_list)); +} + + +void v3_deinit_intr_controllers(struct guest_info * core) { + struct v3_intr_core_state * intr_state = &(core->intr_core_state); + struct intr_controller * ctrlr; + struct intr_controller * tmp; + + // clear out any controllers that were left around + list_for_each_entry_safe(ctrlr, tmp, &(intr_state->controller_list), ctrl_node) { + v3_remove_intr_controller(core, ctrlr); + } +} + + +void v3_init_intr_routers(struct v3_vm_info * vm) { + + INIT_LIST_HEAD(&(vm->intr_routers.router_list)); + + v3_lock_init(&(vm->intr_routers.irq_lock)); + + memset((uchar_t *)(vm->intr_routers.hooks), 0, sizeof(struct v3_irq_hook *) * 256); +} + + +void v3_deinit_intr_routers(struct v3_vm_info * vm) { + struct intr_router * rtr = NULL; + struct intr_router * tmp = NULL; + + // clear out any controllers that were left around + list_for_each_entry_safe(rtr, tmp, &(vm->intr_routers.router_list), router_node) { + v3_remove_intr_router(vm, rtr); + } +} + + +void * v3_register_intr_controller(struct guest_info * info, struct intr_ctrl_ops * ops, void * priv_data) { + struct intr_controller * ctrlr = (struct intr_controller *)V3_Malloc(sizeof(struct intr_controller)); + + ctrlr->priv_data = priv_data; + ctrlr->ctrl_ops = ops; + + list_add(&(ctrlr->ctrl_node), &(info->intr_core_state.controller_list)); + + return (void *)ctrlr; +} + + +void v3_remove_intr_controller(struct guest_info * core, void * handle) { + struct v3_intr_core_state * intr_state = &(core->intr_core_state); + struct intr_controller * ctrlr = handle; + struct intr_controller * tmp = NULL; + int found = 0; + + // search for the entry in the router list + list_for_each_entry(tmp, &(intr_state->controller_list), ctrl_node) { + if (tmp == ctrlr) { + found = 1; + } + } + + if (found == 0) { + PrintError("Attempted to remove invalid interrupt controller handle\n"); + return; + } + + list_del(&(ctrlr->ctrl_node)); + V3_Free(ctrlr); +} + + +void * v3_register_intr_router(struct v3_vm_info * vm, struct intr_router_ops * ops, void * priv_data) { + struct intr_router * router = (struct intr_router *)V3_Malloc(sizeof(struct intr_router)); + + router->priv_data = priv_data; + router->router_ops = ops; + + list_add(&(router->router_node), &(vm->intr_routers.router_list)); + + return (void *)router; +} + + +void v3_remove_intr_router(struct v3_vm_info * vm, void * handle) { + struct intr_router * router = handle; + struct intr_router * tmp = NULL; + int found = 0; + + // search for the entry in the router list + list_for_each_entry(tmp, &(vm->intr_routers.router_list), router_node) { + if (tmp == router) { + found = 1; + } + } + + if (found == 0) { + PrintError("Attempted to remove invalid interrupt router\n"); + return; + } + + list_del(&(router->router_node)); + V3_Free(router); +} + + +static inline struct v3_irq_hook * get_irq_hook(struct v3_vm_info * vm, uint8_t irq) { + return vm->intr_routers.hooks[irq]; +} + + +int v3_hook_irq(struct v3_vm_info * vm, + uint_t irq, + int (*handler)(struct v3_vm_info * vm, 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(vm, irq) != NULL) { + PrintError("IRQ %d already hooked\n", irq); + return -1; + } + + hook->handler = handler; + hook->priv_data = priv_data; + + vm->intr_routers.hooks[irq] = hook; + + if (V3_Hook_Interrupt(vm, 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 v3_vm_info * vm, struct v3_interrupt * intr, void * priv_data) { + PrintDebug("[passthrough_irq_handler] raise_irq=%d (guest=0x%p)\n", + intr->irq, (void *)vm); + + return v3_raise_irq(vm, intr->irq); +} + +int v3_hook_passthrough_irq(struct v3_vm_info * vm, uint_t irq) { + int rc = v3_hook_irq(vm, irq, passthrough_irq_handler, NULL); -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; + if (rc) { + PrintError("guest_irq_injection: failed to hook irq 0x%x (guest=0x%p)\n", irq, (void *)vm); + return -1; + } else { + PrintDebug("guest_irq_injection: hooked irq 0x%x (guest=0x%p)\n", irq, (void *)vm); + return 0; + } +} + + +int v3_deliver_irq(struct v3_vm_info * vm, 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(vm, intr->irq); - info->vm_ops.raise_irq = &raise_irq; + if (hook == NULL) { + PrintError("Attempting to deliver interrupt to non registered hook(irq=%d)\n", intr->irq); + return -1; + } + + return hook->handler(vm, intr, hook->priv_data); } -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; + +int v3_raise_virq(struct guest_info * info, int irq) { + struct v3_intr_core_state * intr_state = &(info->intr_core_state); + int major = irq / 8; + int minor = irq % 8; + + intr_state->virq_map[major] |= (1 << minor); + + return 0; } -int raise_exception(struct guest_info * info, uint_t excp) { +int v3_lower_virq(struct guest_info * info, int irq) { + struct v3_intr_core_state * intr_state = &(info->intr_core_state); + int major = irq / 8; + int minor = irq % 8; + + intr_state->virq_map[major] &= ~(1 << minor); + + return 0; +} + + +int v3_lower_irq(struct v3_vm_info * vm, int irq) { + struct intr_router * router = NULL; + struct v3_intr_routers * routers = &(vm->intr_routers); + + // PrintDebug("[v3_lower_irq]\n"); + addr_t irq_state = v3_lock_irqsave(routers->irq_lock); + + list_for_each_entry(router, &(routers->router_list), router_node) { + router->router_ops->lower_intr(vm, router->priv_data, irq); + } + + v3_unlock_irqrestore(routers->irq_lock, irq_state); + + return 0; +} + + +int v3_raise_irq(struct v3_vm_info * vm, int irq) { + struct intr_router * router = NULL; + struct v3_intr_routers * routers = &(vm->intr_routers); + + // PrintDebug("[v3_raise_irq (%d)]\n", irq); + addr_t irq_state = v3_lock_irqsave(routers->irq_lock); - /* 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_for_each_entry(router, &(routers->router_list), router_node) { + router->router_ops->raise_intr(vm, router->priv_data, irq); + } - return 0; + v3_unlock_irqrestore(routers->irq_lock, irq_state); + + return 0; } -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); +int v3_signal_swintr(struct guest_info * core, int vector) { + struct v3_intr_core_state * intr_state = &(core->intr_core_state); - // 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; + PrintDebug("Signaling software interrupt in vmm_intr.c\n"); + PrintDebug("\tINT vector: %d\n", vector); + + intr_state->swintr_posted = 1; + intr_state->swintr_vector = vector; + 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; - } +int v3_handle_swintr(struct guest_info * core) { + + int ret = 0; + void * instr_ptr = NULL; + struct x86_instr instr; + + if (core->mem_mode == PHYSICAL_MEM) { + ret = v3_gpa_to_hva(core, get_addr_linear(core, core->rip, &(core->segments.cs)), (addr_t *)&instr_ptr); + } else { + ret = v3_gva_to_hva(core, get_addr_linear(core, core->rip, &(core->segments.cs)), (addr_t *)&instr_ptr); + } + + if (ret == -1) { + PrintError("V3 SWintr Handler: Could not translate Instruction Address (%p)\n", (void *)core->rip); + return -1; + } + + if (v3_decode(core, (addr_t)instr_ptr, &instr) == -1) { + PrintError("V3 SWintr Handler: Decoding Error\n"); + return -1; + } + + uint8_t vector = instr.dst_operand.operand; + + struct v3_swintr_hook * hook = core->intr_core_state.swintr_hooks[vector]; + if (hook == NULL) { +#ifdef CONFIG_SWINTR_PASSTHROUGH + if (v3_hook_passthrough_swintr(core, vector) == -1) { + PrintDebug("V3 SWintr Handler: Error hooking passthrough swintr\n"); + return -1; + } + hook = core->intr_core_state.swintr_hooks[vector]; +#else + core->rip += instr.instr_length; + return v3_signal_swintr(core, vector); +#endif + } + + ret = hook->handler(core, vector, NULL); + if (ret == -1) { + PrintDebug("V3 SWintr Handler: Error in swintr hook\n"); + return -1; + } + + /* at some point we may need to prioritize swints + so that they finish in time for the next + instruction */ + core->rip += instr.instr_length; + return v3_signal_swintr(core, vector); +} - /* Check [A]PIC */ - return 0; +static inline struct v3_swintr_hook * get_swintr_hook(struct guest_info * core, uint8_t vector) { + return core->intr_core_state.swintr_hooks[vector]; } -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; - } +int v3_hook_swintr(struct guest_info * core, + uint8_t vector, + int (*handler)(struct guest_info * core, uint8_t vector, void * priv_data), + void * priv_data) +{ - /* someway to get the [A]PIC intr */ + struct v3_swintr_hook * hook = (struct v3_swintr_hook *)V3_Malloc(sizeof(struct v3_swintr_hook)); - return 0; + if (hook == NULL) { + return -1; + } + + if (get_swintr_hook(core, vector) != NULL) { + PrintError("SWINT %d already hooked\n", vector); + return -1; + } + + hook->handler = handler; + hook->priv_data = priv_data; + + core->intr_core_state.swintr_hooks[vector] = hook; + + return 0; } + +static int passthrough_swintr_handler(struct guest_info * core, uint8_t vector, void * 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; - } + PrintDebug("[passthrough_swint_handler] INT vector=%d (guest=0x%p)\n", + vector, (void *)core); - return INVALID_INTR; + return 0; } -int hook_irq(struct guest_info * info, int irq) { - extern struct vmm_os_hooks * os_hooks; - return os_hooks->hook_interrupt(info, irq); +int v3_hook_passthrough_swintr(struct guest_info * core, uint8_t vector) { + + int rc = v3_hook_swintr(core, vector, passthrough_swintr_handler, NULL); + + if (rc) { + PrintError("guest_swintr_injection: failed to hook swint 0x%x (guest=0x%p)\n", vector, (void *)core); + return -1; + } else { + PrintDebug("guest_swintr_injection: hooked swint 0x%x (guest=0x%p)\n", vector, (void *)core); + return 0; + } + + /* shouldn't get here */ + return 0; +} + + +void v3_clear_pending_intr(struct guest_info * core) { + struct v3_intr_core_state * intr_state = &(core->intr_core_state); + + intr_state->irq_pending = 0; +} + + +v3_intr_type_t v3_intr_pending(struct guest_info * info) { + struct v3_intr_core_state * intr_state = &(info->intr_core_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; + } + } + } + + // KCH: added for SWintr injection + if (intr_state->swintr_posted == 1) { + ret = V3_SOFTWARE_INTR; + } + + v3_unlock_irqrestore(intr_state->irq_lock, irq_state); + + return ret; +} + + +uint32_t v3_get_intr(struct guest_info * info) { + struct v3_intr_core_state * intr_state = &(info->intr_core_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_core_state * intr_state = &(info->intr_core_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; }