/* (c) 2008, Jack Lange */ /* (c) 2008, The V3VEE Project */ #include #include #include #ifndef DEBUG_INTERRUPTS #undef PrintDebug #define PrintDebug(fmt, args...) #endif /*Zheng 07/30/2008*/ 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 = &v3_raise_irq; info->vm_ops.lower_irq = &v3_lower_irq; //Zheng added } 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; } // This structure is used to dispatch // interrupts delivered to vmm via deliver interrupt to vmm // it is what we put into the opaque field given to // the host os when we install the handler struct vmm_intr_decode { void (*handler)(struct vmm_intr_state *state); // This opaque is user supplied by the caller // of hook_irq_new void *opaque; }; int v3_hook_irq(uint_t irq, void (*handler)(struct vmm_intr_state *state), void *opaque) { struct vmm_intr_decode *d = (struct vmm_intr_decode *)V3_Malloc(sizeof(struct vmm_intr_decode)); if (!d) { return -1; } d->handler = handler; d->opaque = opaque; if (V3_Hook_Interrupt(irq,d)) { PrintError("hook_irq: failed to hook irq 0x%x to decode 0x%x\n", irq,d); return -1; } else { PrintDebug("hook_irq: hooked irq 0x%x to decode 0x%x\n", irq,d); return 0; } } void deliver_interrupt_to_vmm(struct vmm_intr_state *state) { PrintDebug("deliver_interrupt_to_vmm: state=0x%x\n",state); struct vmm_intr_decode *d = (struct vmm_intr_decode *)(state->opaque); void *temp = state->opaque; state->opaque = d->opaque; d->handler(state); state->opaque=temp; } static void guest_injection_irq_handler(struct vmm_intr_state *state) { struct guest_info *guest = (struct guest_info *)(state->opaque); PrintDebug("[guest_injection_irq_handler] raise_irq=0x%x (guest=0x%x)\n", state->irq, guest); PrintDebug("guest_irq_injection: state=0x%x\n", state); guest->vm_ops.raise_irq(guest,state->irq); } int v3_hook_irq_for_guest_injection(struct guest_info *info, int irq) { int rc = v3_hook_irq(irq, guest_injection_irq_handler, info); if (rc) { PrintError("guest_irq_injection: failed to hook irq 0x%x (guest=0x%x)\n", irq, info); return -1; } else { PrintDebug("guest_irq_injection: hooked irq 0x%x (guest=0x%x)\n", irq, info); return 0; } } int v3_raise_exception_with_error(struct guest_info * info, uint_t excp, uint_t error_code) { struct vm_intr * intr_state = &(info->intr_state); if (intr_state->excp_pending == 0) { intr_state->excp_pending = 1; intr_state->excp_num = excp; intr_state->excp_error_code = error_code; intr_state->excp_error_code_valid = 1; PrintDebug("[v3_raise_exception_with_error] error code: %x\n", error_code); } else { PrintError("exception already pending, currently not implemented\n"); return -1; } return 0; } int v3_raise_exception(struct guest_info * info, uint_t excp) { struct vm_intr * intr_state = &(info->intr_state); PrintDebug("[v3_raise_exception]\n"); if (intr_state->excp_pending == 0) { intr_state->excp_pending = 1; intr_state->excp_num = excp; intr_state->excp_error_code = 0; intr_state->excp_error_code_valid = 0; } else { PrintError("exception already pending, currently not implemented\n"); return -1; } return 0; } /*Zheng 07/30/2008*/ int v3_lower_irq(struct guest_info * info, int irq) { // Look up PIC and resend V3_ASSERT(info); V3_ASSERT(info->intr_state.controller); V3_ASSERT(info->intr_state.controller->raise_intr); PrintDebug("[v3_lower_irq]\n"); // if ((info->intr_state.controller) && // (info->intr_state.controller->raise_intr)) { info->intr_state.controller->lower_intr(info->intr_state.controller_state, irq); //} else { // PrintDebug("There is no registered Interrupt Controller... (NULL POINTER)\n"); // return -1; //} return 0; } int v3_raise_irq(struct guest_info * info, int irq) { // Look up PIC and resend V3_ASSERT(info); V3_ASSERT(info->intr_state.controller); V3_ASSERT(info->intr_state.controller->raise_intr); PrintDebug("[v3_raise_irq]\n"); // if ((info->intr_state.controller) && // (info->intr_state.controller->raise_intr)) { info->intr_state.controller->raise_intr(info->intr_state.controller_state, irq); //} else { // PrintDebug("There is no registered Interrupt Controller... (NULL POINTER)\n"); // return -1; //} return 0; } int intr_pending(struct guest_info * info) { struct vm_intr * intr_state = &(info->intr_state); // PrintDebug("[intr_pending]\n"); if (intr_state->excp_pending == 1) { return 1; } else if (intr_state->controller->intr_pending(intr_state->controller_state) == 1) { return 1; } /* Check [A]PIC */ return 0; } uint_t get_intr_number(struct guest_info * info) { struct vm_intr * intr_state = &(info->intr_state); if (intr_state->excp_pending == 1) { return intr_state->excp_num; } else if (intr_state->controller->intr_pending(intr_state->controller_state)) { PrintDebug("[get_intr_number] intr_number = %d\n", intr_state->controller->get_intr_number(intr_state->controller_state)); return intr_state->controller->get_intr_number(intr_state->controller_state); } /* someway to get the [A]PIC intr */ return 0; } intr_type_t get_intr_type(struct guest_info * info) { struct vm_intr * intr_state = &(info->intr_state); if (intr_state->excp_pending) { PrintDebug("[get_intr_type] Exception\n"); return EXCEPTION; } else if (intr_state->controller->intr_pending(intr_state->controller_state)) { PrintDebug("[get_intr_type] External_irq\n"); return EXTERNAL_IRQ; } PrintDebug("[get_intr_type] Invalid_Intr\n"); return INVALID_INTR; } int injecting_intr(struct guest_info * info, uint_t intr_num, intr_type_t type) { struct vm_intr * intr_state = &(info->intr_state); if (type == EXCEPTION) { PrintDebug("[injecting_intr] Exception\n"); intr_state->excp_pending = 0; intr_state->excp_num = 0; intr_state->excp_error_code = 0; intr_state->excp_error_code_valid = 0; } else if (type == EXTERNAL_IRQ) { PrintDebug("[injecting_intr] External_Irq with intr_num = %x\n", intr_num); return intr_state->controller->begin_irq(intr_state->controller_state, intr_num); } return 0; }