--- /dev/null
+/*
+ * 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, Steven Jaconette <stevenjaconette2007@u.northwestern.edu>
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Steven Jaconette <stevenjaconette2007@u.northwestern.edu>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+#ifndef __VMM_DIRECT_PAGING_64_H__
+#define __VMM_DIRECT_PAGING_64_H__
+
+#include <palacios/vmm_mem.h>
+#include <palacios/vmm_paging.h>
+#include <palacios/vmm.h>
+#include <palacios/vm_guest_mem.h>
+#include <palacios/vm_guest.h>
+
+
+static inline int handle_passthrough_pagefault_64(struct guest_info * info,
+ addr_t fault_addr,
+ pf_error_t error_code) {
+ pml4e64_t * pml = CR3_TO_PML4E64_VA(info->ctrl_regs.cr3);
+ pdpe64_t * pdpe = NULL;
+ pde64_t * pde = NULL;
+ pte64_t * pte = NULL;
+ addr_t host_addr = 0;
+
+ int pml_index = PML4E64_INDEX(fault_addr);
+ int pdpe_index = PDPE64_INDEX(fault_addr);
+ int pde_index = PDE64_INDEX(fault_addr);
+ int pte_index = PTE64_INDEX(fault_addr);
+
+ struct v3_shadow_region * region = v3_get_shadow_region(info, fault_addr);
+
+ if ((region == NULL) ||
+ (region->host_type == SHDW_REGION_INVALID)) {
+ PrintError("Invalid region in passthrough page fault 64, addr=%p\n",
+ (void *)fault_addr);
+ return -1;
+ }
+
+ host_addr = v3_get_shadow_addr(region, fault_addr);
+
+ //Fix up the PML entry
+ if (pml[pml_index].present == 0) {
+ pdpe = (pdpe64_t *)create_generic_pt_page();
+
+ pml[pml_index].present = 1;
+ // Set default PML Flags...
+ pml[pml_index].pdp_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pdpe));
+ } else {
+ pdpe = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pml[pml_index].pdp_base_addr));
+ }
+
+ // Fix up the PDPE entry
+ if (pdpe[pdpe_index].present == 0) {
+ pde = (pde64_t *)create_generic_pt_page();
+
+ pdpe[pdpe_index].present = 1;
+ // Set default PDPE Flags...
+ pdpe[pdpe_index].pd_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pde));
+ } else {
+ pde = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pdpe[pdpe_index].pd_base_addr));
+ }
+
+
+ // Fix up the PDE entry
+ if (pde[pde_index].present == 0) {
+ pte = (pte64_t *)create_generic_pt_page();
+
+ pde[pde_index].present = 1;
+ pde[pde_index].writable = 1;
+ pde[pde_index].user_page = 1;
+
+ pde[pde_index].pt_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pte));
+ } else {
+ pte = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pde[pde_index].pt_base_addr));
+ }
+
+
+ // Fix up the PTE entry
+ if (pte[pte_index].present == 0) {
+ pte[pte_index].user_page = 1;
+
+ if (region->host_type == SHDW_REGION_ALLOCATED) {
+ // Full access
+ pte[pte_index].present = 1;
+ pte[pte_index].writable = 1;
+
+ pte[pte_index].page_base_addr = PAGE_BASE_ADDR(host_addr);
+
+ } else if (region->host_type == SHDW_REGION_WRITE_HOOK) {
+ // Only trap writes
+ pte[pte_index].present = 1;
+ pte[pte_index].writable = 0;
+
+ pte[pte_index].page_base_addr = PAGE_BASE_ADDR(host_addr);
+
+ } else if (region->host_type == SHDW_REGION_FULL_HOOK) {
+ // trap all accesses
+ return v3_handle_mem_full_hook(info, fault_addr, fault_addr, region, error_code);
+
+ } else {
+ PrintError("Unknown Region Type...\n");
+ return -1;
+ }
+ }
+
+ if ( (region->host_type == SHDW_REGION_WRITE_HOOK) &&
+ (error_code.write == 1) ) {
+ return v3_handle_mem_wr_hook(info, fault_addr, fault_addr, region, error_code);
+ }
+
+ return 0;
+}
+
+
+#endif
