X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_intr.c;h=fea0959aaa4e16a6f98c9b9ff3cf36a4e161628a;hb=refs%2Ftags%2Fboots-puppy-iso-to-command-prompt;hp=c15d68c68115bc04b6488a3732f904dc69544c65;hpb=1cf6b8a334fd683681665c177d33ad6c452ad366;p=palacios.git diff --git a/palacios/src/palacios/vmm_intr.c b/palacios/src/palacios/vmm_intr.c index c15d68c..fea0959 100644 --- a/palacios/src/palacios/vmm_intr.c +++ b/palacios/src/palacios/vmm_intr.c @@ -1,4 +1,223 @@ #include +#include +#include + +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; +} + +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 hook_irq_new(uint_t irq, + void (*handler)(struct vmm_intr_state *state), + void *opaque) +{ + extern struct vmm_os_hooks * os_hooks; + + struct vmm_intr_decode *d = V3_Malloc(sizeof(struct vmm_intr_decode)); + + if (!d) { return -1; } + + d->handler = handler; + d->opaque = opaque; + + if (os_hooks->hook_interrupt_new(irq,d)) { + PrintDebug("hook_irq_new: failed to hook irq 0x%x to decode 0x%x\n", irq,d); + return -1; + } else { + PrintDebug("hook_irq_new: 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; +} + + +void guest_injection_irq_handler(struct vmm_intr_state *state) +{ + PrintDebug("guest_irq_injection: state=0x%x\n",state); + + struct guest_info *guest = (struct guest_info *)(state->opaque); + + PrintDebug("guest_irq_injection: injecting irq 0x%x into guest 0x%x\n",state->irq,guest); + guest->vm_ops.raise_irq(guest,state->irq); +} + + +int hook_irq_for_guest_injection(struct guest_info *info, int irq) +{ + + int rc = hook_irq_new(irq, + guest_injection_irq_handler, + info); + + if (rc) { + PrintDebug("guest_irq_injection: failed to hook irq 0x%x for guest 0x%x\n", irq,info); + return -1; + } else { + PrintDebug("guest_irq_injection: hooked irq 0x%x for guest 0x%x\n", irq,info); + 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 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("Raising exception with error code: %x\n", error_code); + } else { + PrintDebug("exception already pending, currently not implemented\n"); + return -1; + } + + return 0; +} + +int raise_exception(struct guest_info * info, uint_t excp) { + 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 = 0; + intr_state->excp_error_code_valid = 0; + } else { + PrintDebug("exception already pending, currently not implemented\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); + + // 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); + + 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)) { + 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) { + return EXCEPTION; + } else if (intr_state->controller->intr_pending(intr_state->controller_state)) { + return EXTERNAL_IRQ; + } + + 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) { + + 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) { + return intr_state->controller->begin_irq(intr_state->controller_state, intr_num); + } + + return 0; +}