X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_intr.c;h=242d63b4a099072b9e9da061948200a34810c7fa;hb=101529b6eae500272347287df43ec51aa003d0aa;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..242d63b 100644 --- a/palacios/src/palacios/vmm_intr.c +++ b/palacios/src/palacios/vmm_intr.c @@ -1,4 +1,249 @@ +/* (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; +}