X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_intr.c;fp=palacios%2Fsrc%2Fpalacios%2Fvmm_intr.c;h=46e1e427497b07260844f99fc3d4f7b2c28e19e1;hp=0000000000000000000000000000000000000000;hb=ddc16b0737cf58f7aa90a69c6652cdf4090aec51;hpb=626595465a2c6987606a6bc697df65130ad8c2d3 diff --git a/palacios/src/palacios/vmm_intr.c b/palacios/src/palacios/vmm_intr.c new file mode 100644 index 0000000..46e1e42 --- /dev/null +++ b/palacios/src/palacios/vmm_intr.c @@ -0,0 +1,279 @@ +/* + * 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 + +#ifndef DEBUG_INTERRUPTS +#undef PrintDebug +#define PrintDebug(fmt, args...) +#endif + + + + +void v3_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; + + memset((uchar_t *)(info->intr_state.hooks), 0, sizeof(struct v3_irq_hook *) * 256); +} + +void v3_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; +} + + + + +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 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; + } +} + + + +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 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); + + 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; + } +} + + + + + +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); +} + + + + + + + + +int v3_raise_exception_with_error(struct guest_info * info, uint_t excp, uint_t error_code) { + struct v3_intr_state * 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 v3_intr_state * 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; +} + + +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->lower_intr); + + PrintDebug("[v3_lower_irq]\n"); + + if ((info->intr_state.controller) && + (info->intr_state.controller->lower_intr)) { + info->intr_state.controller->lower_intr(info->intr_state.controller_state, irq); + } else { + PrintError("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 { + PrintError("There is no registered Interrupt Controller... (NULL POINTER)\n"); + return -1; + } + + return 0; +} + + + +int v3_intr_pending(struct guest_info * info) { + struct v3_intr_state * 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 v3_get_intr_number(struct guest_info * info) { + struct v3_intr_state * 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 v3_get_intr_type(struct guest_info * info) { + struct v3_intr_state * 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 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 == 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; +}