-/* (c) 2008, Jack Lange <jarusl@cs.northwestern.edu> */
-/* (c) 2008, The V3VEE Project <http://www.v3vee.org> */
-
+/*
+ * 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 <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
#include <palacios/vmm_paging.h>
+#define USE_VMM_PAGING_DEBUG
+// All of the debug functions defined in vmm_paging.h are implemented in this file
+#include "vmm_paging_debug.h"
+#undef USE_VMM_PAGING_DEBUG
+
-void delete_page_tables_pde32(pde32_t * pde) {
- int i;//, j;
+void delete_page_tables_32(pde32_t * pde) {
+ int i;
if (pde == NULL) {
return;
for (i = 0; (i < MAX_PDE32_ENTRIES); i++) {
if (pde[i].present) {
- pte32_t * pte = (pte32_t *)(pde[i].pt_base_addr << PAGE_POWER);
+ // We double cast, first to an addr_t to handle 64 bit issues, then to the pointer
+ PrintDebug("PTE base addr %x \n", pde[i].pt_base_addr);
+ pte32_t * pte = (pte32_t *)((addr_t)(uint_t)(pde[i].pt_base_addr << PAGE_POWER));
- /*
- for (j = 0; (j < MAX_PTE32_ENTRIES); j++) {
- if ((pte[j].present)) {
- os_hooks->free_page((void *)(pte[j].page_base_addr << PAGE_POWER));
- }
- }
- */
- //PrintDebug("Deleting PTE %d (%x)\n", i, pte);
+ PrintDebug("Deleting PTE %d (%p)\n", i, pte);
V3_FreePage(pte);
}
}
- // PrintDebug("Deleting PDE (%x)\n", pde);
- V3_FreePage(pde);
+ PrintDebug("Deleting PDE (%p)\n", pde);
+ V3_FreePage(V3_PAddr(pde));
+}
+
+void delete_page_tables_32PAE(pdpe32pae_t * pdpe) {
+ PrintError("Unimplemented function\n");
+}
+
+void delete_page_tables_64(pml4e64_t * pml4) {
+ PrintError("Unimplemented function\n");
+}
+
+
+int v3_translate_guest_pt_32(struct guest_info * info, v3_reg_t guest_cr3, addr_t vaddr, addr_t * paddr) {
+ addr_t guest_pde_pa = CR3_TO_PDE32_PA(guest_cr3);
+ pde32_t * guest_pde = 0;
+ addr_t guest_pte_pa = 0;
+
+ if (guest_pa_to_host_va(info, guest_pde_pa, (addr_t*)&guest_pde) == -1) {
+ PrintError("Could not get virtual address of Guest PDE32 (PA=%p)\n",
+ (void *)guest_pde_pa);
+ return -1;
+ }
+
+ switch (pde32_lookup(guest_pde, vaddr, &guest_pte_pa)) {
+ case PT_ENTRY_NOT_PRESENT:
+ *paddr = 0;
+ return -1;
+ case PT_ENTRY_LARGE_PAGE:
+ *paddr = guest_pte_pa;
+ return 0;
+ case PT_ENTRY_PAGE:
+ {
+ pte32_t * guest_pte = NULL;
+
+ if (guest_pa_to_host_va(info, guest_pte_pa, (addr_t*)&guest_pte) == -1) {
+ PrintError("Could not get virtual address of Guest PTE32 (PA=%p)\n",
+ (void *)guest_pte_pa);
+ return -1;
+ }
+
+ if (pte32_lookup(guest_pte, vaddr, paddr) == PT_ENTRY_NOT_PRESENT) {
+ return -1;
+ }
+
+ return 0;
+ }
+ }
+
+ // should never get here
+ return -1;
}
+int v3_translate_guest_pt_32pae(struct guest_info * info, v3_reg_t guest_cr3, addr_t vaddr, addr_t * paddr) {
+ addr_t guest_pdpe_pa = CR3_TO_PDPE32PAE_PA(guest_cr3);
+ pdpe32pae_t * guest_pdpe = 0;
+ addr_t guest_pde_pa = 0;
+ if (guest_pa_to_host_va(info, guest_pdpe_pa, (addr_t*)&guest_pdpe) == -1) {
+ PrintError("Could not get virtual address of Guest PDPE32PAE (PA=%p)\n",
+ (void *)guest_pdpe_pa);
+ return -1;
+ }
+ switch (pdpe32pae_lookup(guest_pdpe, vaddr, &guest_pde_pa))
+ {
+ case PT_ENTRY_NOT_PRESENT:
+ *paddr = 0;
+ return -1;
+ case PT_ENTRY_PAGE:
+ {
+ pde32pae_t * guest_pde = NULL;
+ addr_t guest_pte_pa = 0;
+
+ if (guest_pa_to_host_va(info, guest_pde_pa, (addr_t *)&guest_pde) == -1) {
+ PrintError("Could not get virtual Address of Guest PDE32PAE (PA=%p)\n",
+ (void *)guest_pde_pa);
+ return -1;
+ }
+
+ switch (pde32pae_lookup(guest_pde, vaddr, &guest_pte_pa))
+ {
+ case PT_ENTRY_NOT_PRESENT:
+ *paddr = 0;
+ return -1;
+ case PT_ENTRY_LARGE_PAGE:
+ *paddr = guest_pte_pa;
+ return 0;
+ case PT_ENTRY_PAGE:
+ {
+ pte32pae_t * guest_pte = NULL;
+
+ if (guest_pa_to_host_va(info, guest_pte_pa, (addr_t *)&guest_pte) == -1) {
+ PrintError("Could not get virtual Address of Guest PTE32PAE (PA=%p)\n",
+ (void *)guest_pte_pa);
+ return -1;
+ }
+
+ if (pte32pae_lookup(guest_pte, vaddr, paddr) == PT_ENTRY_NOT_PRESENT) {
+ return -1;
+ }
+
+ return 0;
+ }
+ }
+ }
+ default:
+ return -1;
+ }
-int pt32_lookup(pde32_t * pd, addr_t vaddr, addr_t * paddr) {
- addr_t pde_entry;
- pde32_entry_type_t pde_entry_type;
+ // should never get here
+ return -1;
+}
+
+int v3_translate_guest_pt_64(struct guest_info * info, v3_reg_t guest_cr3, addr_t vaddr, addr_t * paddr) {
+ addr_t guest_pml4_pa = CR3_TO_PML4E64_PA(guest_cr3);
+ pml4e64_t * guest_pmle = 0;
+ addr_t guest_pdpe_pa = 0;
- if (pd == 0) {
+ if (guest_pa_to_host_va(info, guest_pml4_pa, (addr_t*)&guest_pmle) == -1) {
+ PrintError("Could not get virtual address of Guest PML4E64 (PA=%p)\n",
+ (void *)guest_pml4_pa);
return -1;
}
+
+ switch (pml4e64_lookup(guest_pmle, vaddr, &guest_pdpe_pa)) {
+ case PT_ENTRY_NOT_PRESENT:
+ *paddr = 0;
+ return -1;
+ case PT_ENTRY_PAGE:
+ {
+ pdpe64_t * guest_pdp = NULL;
+ addr_t guest_pde_pa = 0;
+
+ if (guest_pa_to_host_va(info, guest_pdpe_pa, (addr_t *)&guest_pdp) == -1) {
+ PrintError("Could not get virtual address of Guest PDPE64 (PA=%p)\n",
+ (void *)guest_pdpe_pa);
+ return -1;
+ }
- pde_entry_type = pde32_lookup(pd, vaddr, &pde_entry);
+ switch (pdpe64_lookup(guest_pdp, vaddr, &guest_pde_pa)) {
+ case PT_ENTRY_NOT_PRESENT:
+ *paddr = 0;
+ return -1;
+ case PT_ENTRY_LARGE_PAGE:
+ *paddr = 0;
+ PrintError("1 Gigabyte Pages not supported\n");
+ return -1;
+ case PT_ENTRY_PAGE:
+ {
+ pde64_t * guest_pde = NULL;
+ addr_t guest_pte_pa = 0;
+
+ if (guest_pa_to_host_va(info, guest_pde_pa, (addr_t *)&guest_pde) == -1) {
+ PrintError("Could not get virtual address of guest PDE64 (PA=%p)\n",
+ (void *)guest_pde_pa);
+ return -1;
+ }
+
+ switch (pde64_lookup(guest_pde, vaddr, &guest_pte_pa)) {
+ case PT_ENTRY_NOT_PRESENT:
+ *paddr = 0;
+ return -1;
+ case PT_ENTRY_LARGE_PAGE:
+ *paddr = guest_pte_pa;
+ return 0;
+ case PT_ENTRY_PAGE:
+ {
+ pte64_t * guest_pte = NULL;
+
+ if (guest_pa_to_host_va(info, guest_pte_pa, (addr_t *)&guest_pte) == -1) {
+ PrintError("Could not get virtual address of guest PTE64 (PA=%p)\n",
+ (void *)guest_pte_pa);
+ return -1;
+ }
+
+ if (pte64_lookup(guest_pte, vaddr, paddr) == PT_ENTRY_NOT_PRESENT) {
+ return -1;
+ }
+
+ return 0;
+ }
+ }
+ }
+ }
+ }
+ default:
+ return -1;
+ }
- if (pde_entry_type == PDE32_ENTRY_PTE32) {
- return pte32_lookup((pte32_t *)pde_entry, vaddr, paddr);
- } else if (pde_entry_type == PDE32_ENTRY_LARGE_PAGE) {
- *paddr = pde_entry;
+ // should never get here
+ return -1;
+}
+
+
+
+int v3_translate_host_pt_32(v3_reg_t host_cr3, addr_t vaddr, addr_t * paddr) {
+ pde32_t * host_pde = (pde32_t *)CR3_TO_PDE32_VA(host_cr3);
+ pte32_t * host_pte = 0;
+
+ switch (pde32_lookup(host_pde, vaddr, (addr_t *)&host_pte)) {
+ case PT_ENTRY_NOT_PRESENT:
+ *paddr = 0;
+ return -1;
+ case PT_ENTRY_LARGE_PAGE:
+ *paddr = (addr_t)host_pte;
+ return 0;
+ case PT_ENTRY_PAGE:
+ if (pte32_lookup(V3_VAddr(host_pte), vaddr, paddr) == PT_ENTRY_NOT_PRESENT) {
+ return -1;
+ }
return 0;
}
+
+ // should never get here
+ return -1;
+}
+
+int v3_translate_host_pt_32pae(v3_reg_t host_cr3, addr_t vaddr, addr_t * paddr) {
+ pdpe32pae_t * host_pdpe = (pdpe32pae_t *)CR3_TO_PDPE32PAE_VA(host_cr3);
+ pde32pae_t * host_pde = NULL;
+ pte32pae_t * host_pte = NULL;
+
+ switch (pdpe32pae_lookup(host_pdpe, vaddr, (addr_t *)&host_pde)) {
+ case PT_ENTRY_NOT_PRESENT:
+ *paddr = 0;
+ return -1;
+ case PT_ENTRY_PAGE:
+ switch (pde32pae_lookup(V3_VAddr(host_pde), vaddr, (addr_t *)&host_pte)) {
+ case PT_ENTRY_NOT_PRESENT:
+ *paddr = 0;
+ return -1;
+ case PT_ENTRY_LARGE_PAGE:
+ *paddr = (addr_t)host_pte;
+ return 0;
+ case PT_ENTRY_PAGE:
+ if (pte32pae_lookup(V3_VAddr(host_pte), vaddr, paddr) == PT_ENTRY_NOT_PRESENT) {
+ return -1;
+ }
+ return 0;
+ }
+ default:
+ return -1;
+ }
+
+ // should never get here
return -1;
}
+int v3_translate_host_pt_64(v3_reg_t host_cr3, addr_t vaddr, addr_t * paddr) {
+ pml4e64_t * host_pmle = (pml4e64_t *)CR3_TO_PML4E64_VA(host_cr3);
+ pdpe64_t * host_pdpe = NULL;
+ pde64_t * host_pde = NULL;
+ pte64_t * host_pte = NULL;
-/* We can't do a full lookup because we don't know what context the page tables are in...
- * The entry addresses could be pointing to either guest physical memory or host physical memory
- * Instead we just return the entry address, and a flag to show if it points to a pte or a large page...
+ switch(pml4e64_lookup(host_pmle, vaddr, (addr_t *)&host_pdpe)) {
+ case PT_ENTRY_NOT_PRESENT:
+ *paddr = 0;
+ return -1;
+ case PT_ENTRY_PAGE:
+ switch(pdpe64_lookup(V3_VAddr(host_pdpe), vaddr, (addr_t *)&host_pde)) {
+ case PT_ENTRY_NOT_PRESENT:
+ *paddr = 0;
+ return -1;
+ case PT_ENTRY_LARGE_PAGE:
+ *paddr = 0;
+ PrintError("1 Gigabyte Pages not supported\n");
+ return -1;
+ case PT_ENTRY_PAGE:
+ switch (pde64_lookup(V3_VAddr(host_pde), vaddr, (addr_t *)&host_pte)) {
+ case PT_ENTRY_NOT_PRESENT:
+ *paddr = 0;
+ return -1;
+ case PT_ENTRY_LARGE_PAGE:
+ *paddr = (addr_t)host_pte;
+ return 0;
+ case PT_ENTRY_PAGE:
+ if (pte64_lookup(V3_VAddr(host_pte), vaddr, paddr) == PT_ENTRY_NOT_PRESENT) {
+ return -1;
+ }
+ return 0;
+ }
+ }
+ default:
+ return -1;
+ }
+
+ // should never get here
+ return -1;
+}
+
+
+
+
+
+/*
+ * PAGE TABLE LOOKUP FUNCTIONS
+ *
+ *
+ * The value of entry is a return type:
+ * Page not present: *entry = 0
+ * Large Page: *entry = translated physical address (byte granularity)
+ * PTE entry: *entry is the address of the PTE Page
*/
-pde32_entry_type_t pde32_lookup(pde32_t * pd, addr_t addr, addr_t * entry) {
+
+/**
+ *
+ * 32 bit Page Table lookup functions
+ *
+ **/
+
+pt_entry_type_t pde32_lookup(pde32_t * pd, addr_t addr, addr_t * entry) {
pde32_t * pde_entry = &(pd[PDE32_INDEX(addr)]);
if (!pde_entry->present) {
*entry = 0;
- return PDE32_ENTRY_NOT_PRESENT;
- } else {
+ return PT_ENTRY_NOT_PRESENT;
+ } else if (pde_entry->large_page) {
+ pde32_4MB_t * large_pde = (pde32_4MB_t *)pde_entry;
- if (pde_entry->large_page) {
- pde32_4MB_t * large_pde = (pde32_4MB_t *)pde_entry;
+ *entry = BASE_TO_PAGE_ADDR_4MB(large_pde->page_base_addr);
+ *entry += PAGE_OFFSET_4MB(addr);
- *entry = PDE32_4MB_T_ADDR(*large_pde);
- *entry += PD32_4MB_PAGE_OFFSET(addr);
- return PDE32_ENTRY_LARGE_PAGE;
- } else {
- *entry = PDE32_T_ADDR(*pde_entry);
- return PDE32_ENTRY_PTE32;
- }
- }
- return PDE32_ENTRY_NOT_PRESENT;
+ return PT_ENTRY_LARGE_PAGE;
+ } else {
+ *entry = BASE_TO_PAGE_ADDR(pde_entry->pt_base_addr);
+ return PT_ENTRY_PAGE;
+ }
}
/* Takes a virtual addr (addr) and returns the physical addr (entry) as defined in the page table
*/
-int pte32_lookup(pte32_t * pt, addr_t addr, addr_t * entry) {
+pt_entry_type_t pte32_lookup(pte32_t * pt, addr_t addr, addr_t * entry) {
pte32_t * pte_entry = &(pt[PTE32_INDEX(addr)]);
if (!pte_entry->present) {
*entry = 0;
- PrintDebug("Lookup at non present page (index=%d)\n", PTE32_INDEX(addr));
+ // PrintDebug("Lookup at non present page (index=%d)\n", PTE32_INDEX(addr));
+ return PT_ENTRY_NOT_PRESENT;
+ } else {
+ *entry = BASE_TO_PAGE_ADDR(pte_entry->page_base_addr) + PAGE_OFFSET(addr);
+ return PT_ENTRY_PAGE;
+ }
+
+}
+
+
+
+/**
+ *
+ * 32 bit PAE Page Table lookup functions
+ *
+ **/
+pt_entry_type_t pdpe32pae_lookup(pdpe32pae_t * pdp, addr_t addr, addr_t * entry) {
+ pdpe32pae_t * pdpe_entry = &(pdp[PDPE32PAE_INDEX(addr)]);
+
+ if (!pdpe_entry->present) {
+ *entry = 0;
+ return PT_ENTRY_NOT_PRESENT;
+ } else {
+ *entry = BASE_TO_PAGE_ADDR(pdpe_entry->pd_base_addr);
+ return PT_ENTRY_PAGE;
+ }
+}
+
+pt_entry_type_t pde32pae_lookup(pde32pae_t * pd, addr_t addr, addr_t * entry) {
+ pde32pae_t * pde_entry = &(pd[PDE32PAE_INDEX(addr)]);
+
+ if (!pde_entry->present) {
+ *entry = 0;
+ return PT_ENTRY_NOT_PRESENT;
+ } else if (pde_entry->large_page) {
+ pde32pae_2MB_t * large_pde = (pde32pae_2MB_t *)pde_entry;
+
+ *entry = BASE_TO_PAGE_ADDR_2MB(large_pde->page_base_addr);
+ *entry += PAGE_OFFSET_2MB(addr);
+
+ return PT_ENTRY_LARGE_PAGE;
+ } else {
+ *entry = BASE_TO_PAGE_ADDR(pde_entry->pt_base_addr);
+ return PT_ENTRY_PAGE;
+ }
+}
+
+pt_entry_type_t pte32pae_lookup(pte32pae_t * pt, addr_t addr, addr_t * entry) {
+ pte32pae_t * pte_entry = &(pt[PTE32PAE_INDEX(addr)]);
+
+ if (!pte_entry->present) {
+ *entry = 0;
+ return PT_ENTRY_NOT_PRESENT;
+ } else {
+ *entry = BASE_TO_PAGE_ADDR(pte_entry->page_base_addr) + PAGE_OFFSET(addr);
+ return PT_ENTRY_PAGE;
+ }
+}
+
+
+
+/**
+ *
+ * 64 bit Page Table lookup functions
+ *
+ **/
+pt_entry_type_t pml4e64_lookup(pml4e64_t * pml, addr_t addr, addr_t * entry) {
+ pml4e64_t * pml_entry = &(pml[PML4E64_INDEX(addr)]);
+
+ if (!pml_entry->present) {
+ *entry = 0;
+ return PT_ENTRY_NOT_PRESENT;
+ } else {
+ *entry = BASE_TO_PAGE_ADDR(pml_entry->pdp_base_addr);
+ return PT_ENTRY_PAGE;
+ }
+}
+
+pt_entry_type_t pdpe64_lookup(pdpe64_t * pdp, addr_t addr, addr_t * entry) {
+ pdpe64_t * pdpe_entry = &(pdp[PDPE64_INDEX(addr)]);
+
+ if (!pdpe_entry->present) {
+ *entry = 0;
+ return PT_ENTRY_NOT_PRESENT;
+ } else if (pdpe_entry->large_page) {
+ PrintError("1 Gigabyte pages not supported\n");
+ V3_ASSERT(0);
return -1;
} else {
- *entry = PTE32_T_ADDR(*pte_entry) + PT32_PAGE_OFFSET(addr);
+ *entry = BASE_TO_PAGE_ADDR(pdpe_entry->pd_base_addr);
+ return PT_ENTRY_PAGE;
+ }
+}
+
+pt_entry_type_t pde64_lookup(pde64_t * pd, addr_t addr, addr_t * entry) {
+ pde64_t * pde_entry = &(pd[PDE64_INDEX(addr)]);
+
+ if (!pde_entry->present) {
+ *entry = 0;
+ return PT_ENTRY_NOT_PRESENT;
+ } else if (pde_entry->large_page) {
+ pde64_2MB_t * large_pde = (pde64_2MB_t *)pde_entry;
+
+ *entry = BASE_TO_PAGE_ADDR_2MB(large_pde->page_base_addr);
+ *entry += PAGE_OFFSET_2MB(addr);
+
+ return PT_ENTRY_LARGE_PAGE;
+ } else {
+ *entry = BASE_TO_PAGE_ADDR(pde_entry->pt_base_addr);
+ return PT_ENTRY_PAGE;
+ }
+}
+
+pt_entry_type_t pte64_lookup(pte64_t * pt, addr_t addr, addr_t * entry) {
+ pte64_t * pte_entry = &(pt[PTE64_INDEX(addr)]);
+
+ if (!pte_entry->present) {
+ *entry = 0;
+ return PT_ENTRY_NOT_PRESENT;
+ } else {
+ *entry = BASE_TO_PAGE_ADDR(pte_entry->page_base_addr) + PAGE_OFFSET(addr);
+ return PT_ENTRY_PAGE;
+ }
+}
+
+
+
+
+
+
+
+
+/*
+ *
+ * Page Table Access Checks
+ *
+ */
+
+
+
+
+
+
+int v3_check_host_pt_32(v3_reg_t host_cr3, addr_t vaddr, pf_error_t access_type, pt_access_status_t * access_status) {
+ pde32_t * host_pde = (pde32_t *)CR3_TO_PDE32_VA(host_cr3);
+ pte32_t * host_pte = 0;
+
+ int pt_level = 2;
+
+ // Check accessibility of PDE
+ *access_status = v3_can_access_pde32(host_pde, vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ pt_level--;
+
+ switch (pde32_lookup(host_pde, vaddr, (addr_t *)&host_pte)) {
+ case PT_ENTRY_LARGE_PAGE:
return 0;
+ case PT_ENTRY_PAGE:
+ *access_status = v3_can_access_pte32(V3_VAddr(host_pte), vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ return 0;
+ default:
+ return -1;
}
+
+ // should never get here
+ return -1;
+}
+
+int v3_check_host_pt_32pae(v3_reg_t host_cr3, addr_t vaddr, pf_error_t access_type, pt_access_status_t * access_status) {
+ pdpe32pae_t * host_pdpe = (pdpe32pae_t *)CR3_TO_PDPE32PAE_VA(host_cr3);
+ pde32pae_t * host_pde = NULL;
+ pte32pae_t * host_pte = NULL;
+ int pt_level = 3;
+ *access_status = v3_can_access_pdpe32pae(host_pdpe, vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ pt_level--;
+
+ switch (pdpe32pae_lookup(host_pdpe, vaddr, (addr_t *)&host_pde)) {
+ case PT_ENTRY_PAGE:
+ *access_status = v3_can_access_pde32pae(V3_VAddr(host_pde), vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ pt_level--;
+
+ switch (pde32pae_lookup(V3_VAddr(host_pde), vaddr, (addr_t *)&host_pte)) {
+ case PT_ENTRY_LARGE_PAGE:
+ return 0;
+ case PT_ENTRY_PAGE:
+ *access_status = v3_can_access_pte32pae(V3_VAddr(host_pte), vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ return 0;
+ default:
+ return -1;
+ }
+ default:
+ return -1;
+ }
+
+ // should never get here
return -1;
}
-pt_access_status_t can_access_pde32(pde32_t * pde, addr_t addr, pf_error_t access_type) {
- pde32_t * entry = &pde[PDE32_INDEX(addr)];
+int v3_check_host_pt_64(v3_reg_t host_cr3, addr_t vaddr, pf_error_t access_type, pt_access_status_t * access_status) {
+ pml4e64_t * host_pmle = (pml4e64_t *)CR3_TO_PML4E64_VA(host_cr3);
+ pdpe64_t * host_pdpe = NULL;
+ pde64_t * host_pde = NULL;
+ pte64_t * host_pte = NULL;
+ int pt_level = 4;
- if (entry->present == 0) {
- return PT_ENTRY_NOT_PRESENT;
- } else if ((entry->writable == 0) && (access_type.write == 1)) {
- return PT_WRITE_ERROR;
- } else if ((entry->user_page == 0) && (access_type.user == 1)) {
- // Check CR0.WP?
- return PT_USER_ERROR;
+
+ *access_status = v3_can_access_pml4e64(host_pmle, vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
}
- return PT_ACCESS_OK;
+ pt_level--;
+
+ switch(pml4e64_lookup(host_pmle, vaddr, (addr_t *)&host_pdpe)) {
+ case PT_ENTRY_PAGE:
+ *access_status = v3_can_access_pdpe64(V3_VAddr(host_pdpe), vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ pt_level--;
+
+ switch(pdpe64_lookup(V3_VAddr(host_pdpe), vaddr, (addr_t *)&host_pde)) {
+ case PT_ENTRY_LARGE_PAGE:
+ return 0;
+ case PT_ENTRY_PAGE:
+ *access_status = v3_can_access_pde64(V3_VAddr(host_pde), vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ pt_level--;
+
+ switch (pde64_lookup(V3_VAddr(host_pde), vaddr, (addr_t *)&host_pte)) {
+ case PT_ENTRY_LARGE_PAGE:
+ return 0;
+ case PT_ENTRY_PAGE:
+ *access_status = v3_can_access_pte64(V3_VAddr(host_pte), vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ return 0;
+ default:
+ return -1;
+ }
+ default:
+ return -1;
+ }
+ default:
+ return -1;
+ }
+
+ // should never get here
+ return -1;
}
-pt_access_status_t can_access_pte32(pte32_t * pte, addr_t addr, pf_error_t access_type) {
- pte32_t * entry = &pte[PTE32_INDEX(addr)];
- if (entry->present == 0) {
- return PT_ENTRY_NOT_PRESENT;
- } else if ((entry->writable == 0) && (access_type.write == 1)) {
- return PT_WRITE_ERROR;
- } else if ((entry->user_page == 0) && (access_type.user == 1)) {
+
+
+int v3_check_guest_pt_32(struct guest_info * info, v3_reg_t guest_cr3, addr_t vaddr,
+ pf_error_t access_type, pt_access_status_t * access_status) {
+ addr_t guest_pde_pa = CR3_TO_PDE32_PA(guest_cr3);
+ pde32_t * guest_pde = NULL;
+ addr_t guest_pte_pa = 0;
+ int pt_level = 2;
+
+ if (guest_pa_to_host_va(info, guest_pde_pa, (addr_t*)&guest_pde) == -1) {
+ PrintError("Could not get virtual address of Guest PDE32 (PA=%p)\n",
+ (void *)guest_pde_pa);
+ return -1;
+ }
+
+
+ // Check accessibility of PDE
+ *access_status = v3_can_access_pde32(guest_pde, vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ pt_level--;
+
+ switch (pde32_lookup(guest_pde, vaddr, &guest_pte_pa)) {
+ case PT_ENTRY_LARGE_PAGE:
+ return 0;
+ case PT_ENTRY_PAGE:
+ {
+ pte32_t * guest_pte = NULL;
+
+ if (guest_pa_to_host_va(info, guest_pte_pa, (addr_t*)&guest_pte) == -1) {
+ PrintError("Could not get virtual address of Guest PTE32 (PA=%p)\n",
+ (void *)guest_pte_pa);
+ return -1;
+ }
+
+ *access_status = v3_can_access_pte32(guest_pte, vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+ return 0;
+ }
+ default:
+ return -1;
+ }
+
+ // should never get here
+ return -1;
+}
+
+
+
+
+
+int v3_check_guest_pt_32pae(struct guest_info * info, v3_reg_t guest_cr3, addr_t vaddr,
+ pf_error_t access_type, pt_access_status_t * access_status) {
+ addr_t guest_pdpe_pa = CR3_TO_PDPE32PAE_PA(guest_cr3);
+ pdpe32pae_t * guest_pdpe = NULL;
+ addr_t guest_pde_pa = 0;
+ int pt_level = 3;
+
+ if (guest_pa_to_host_va(info, guest_pdpe_pa, (addr_t*)&guest_pdpe) == -1) {
+ PrintError("Could not get virtual address of Guest PDPE32PAE (PA=%p)\n",
+ (void *)guest_pdpe_pa);
+ return -1;
+ }
+
+ *access_status = v3_can_access_pdpe32pae(guest_pdpe, vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ pt_level--;
+
+ switch (pdpe32pae_lookup(guest_pdpe, vaddr, &guest_pde_pa)) {
+ case PT_ENTRY_PAGE:
+ {
+ pde32pae_t * guest_pde = NULL;
+ addr_t guest_pte_pa = 0;
+
+ if (guest_pa_to_host_va(info, guest_pde_pa, (addr_t *)&guest_pde) == -1) {
+ PrintError("Could not get virtual Address of Guest PDE32PAE (PA=%p)\n",
+ (void *)guest_pde_pa);
+ return -1;
+ }
+
+ *access_status = v3_can_access_pde32pae(guest_pde, vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ pt_level--;
+
+ switch (pde32pae_lookup(guest_pde, vaddr, &guest_pte_pa)) {
+ case PT_ENTRY_LARGE_PAGE:
+ return 0;
+ case PT_ENTRY_PAGE:
+ {
+ pte32pae_t * guest_pte = NULL;
+
+ if (guest_pa_to_host_va(info, guest_pte_pa, (addr_t *)&guest_pte) == -1) {
+ PrintError("Could not get virtual Address of Guest PTE32PAE (PA=%p)\n",
+ (void *)guest_pte_pa);
+ return -1;
+ }
+
+ *access_status = v3_can_access_pte32pae(guest_pte, vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ return 0;
+ }
+ default:
+ return -1;
+ }
+ }
+ default:
+ return -1;
+ }
+
+ // should never get here
+ return -1;
+}
+
+
+ pte64_t * guest_pte = NULL;
+
+int v3_check_guest_pt_64(struct guest_info * info, v3_reg_t guest_cr3, addr_t vaddr,
+ pf_error_t access_type, pt_access_status_t * access_status) {
+ addr_t guest_pml4_pa = CR3_TO_PML4E64_PA(guest_cr3);
+ pml4e64_t * guest_pmle = NULL;
+ addr_t guest_pdpe_pa = 0;
+ int pt_level = 4;
+
+ if (guest_pa_to_host_va(info, guest_pml4_pa, (addr_t*)&guest_pmle) == -1) {
+ PrintError("Could not get virtual address of Guest PML4E64 (PA=%p)\n",
+ (void *)guest_pml4_pa);
+ return -1;
+ }
+
+ *access_status = v3_can_access_pml4e64(guest_pmle, vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ pt_level--;
+
+ switch(pml4e64_lookup(guest_pmle, vaddr, &guest_pdpe_pa)) {
+ case PT_ENTRY_PAGE:
+ {
+ pdpe64_t * guest_pdp = NULL;
+ addr_t guest_pde_pa = 0;
+
+ if (guest_pa_to_host_va(info, guest_pdpe_pa, (addr_t *)&guest_pdp) == -1) {
+ PrintError("Could not get virtual address of Guest PDPE64 (PA=%p)\n",
+ (void *)guest_pdpe_pa);
+ return -1;
+ }
+
+ *access_status = v3_can_access_pdpe64(guest_pdp, vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ pt_level--;
+
+ switch(pdpe64_lookup(guest_pdp, vaddr, &guest_pde_pa)) {
+ case PT_ENTRY_LARGE_PAGE:
+ return 0;
+ case PT_ENTRY_PAGE:
+ {
+ pde64_t * guest_pde = NULL;
+ addr_t guest_pte_pa = 0;
+
+ if (guest_pa_to_host_va(info, guest_pde_pa, (addr_t *)&guest_pde) == -1) {
+ PrintError("Could not get virtual address of guest PDE64 (PA=%p)\n",
+ (void *)guest_pde_pa);
+ return -1;
+ }
+
+ *access_status = v3_can_access_pde64(guest_pde, vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ pt_level--;
+
+ switch (pde64_lookup(guest_pde, vaddr, &guest_pte_pa)) {
+ case PT_ENTRY_LARGE_PAGE:
+ return 0;
+ case PT_ENTRY_PAGE:
+ {
+ pte64_t * guest_pte = NULL;
+
+ if (guest_pa_to_host_va(info, guest_pte_pa, (addr_t *)&guest_pte) == -1) {
+ PrintError("Could not get virtual address of guest PTE64 (PA=%p)\n",
+ (void *)guest_pte_pa);
+ return -1;
+ }
+
+ *access_status = v3_can_access_pte64(guest_pte, vaddr, access_type);
+
+ if (*access_status != PT_ACCESS_OK) {
+ return pt_level;
+ }
+
+ return 0;
+ }
+ default:
+ return -1;
+ }
+ }
+ default:
+ return -1;
+ }
+ }
+ default:
+ return -1;
+ }
+
+ // should never get here
+ return -1;
+}
+
+
+
+
+
+static pt_access_status_t can_access_pt_entry(gen_pt_t * pt, pf_error_t access_type) {
+ if (pt->present == 0) {
+ return PT_ACCESS_NOT_PRESENT;
+ } else if ((pt->writable == 0) && (access_type.write == 1)) {
+ return PT_ACCESS_WRITE_ERROR;
+ } else if ((pt->user_page == 0) && (access_type.user == 1)) {
// Check CR0.WP?
- return PT_USER_ERROR;
+ return PT_ACCESS_USER_ERROR;
}
return PT_ACCESS_OK;
+/*
+ * 32 bit access checks
+ */
+pt_access_status_t inline v3_can_access_pde32(pde32_t * pde, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pde[PDE32_INDEX(addr)];
+ return can_access_pt_entry(entry, access_type);
+}
+
+pt_access_status_t inline v3_can_access_pte32(pte32_t * pte, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pte[PTE32_INDEX(addr)];
+ return can_access_pt_entry(entry, access_type);
+}
+
+
+/*
+ * 32 bit PAE access checks
+ */
+pt_access_status_t inline v3_can_access_pdpe32pae(pdpe32pae_t * pdpe, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pdpe[PDPE32PAE_INDEX(addr)];
+ return can_access_pt_entry(entry, access_type);
+}
+
+pt_access_status_t inline v3_can_access_pde32pae(pde32pae_t * pde, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pde[PDE32PAE_INDEX(addr)];
+ return can_access_pt_entry(entry, access_type);
+}
+
+pt_access_status_t inline v3_can_access_pte32pae(pte32pae_t * pte, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pte[PTE32PAE_INDEX(addr)];
+ return can_access_pt_entry(entry, access_type);
+}
+
+/*
+ * 64 Bit access checks
+ */
+pt_access_status_t inline v3_can_access_pml4e64(pml4e64_t * pmle, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pmle[PML4E64_INDEX(addr)];
+ return can_access_pt_entry(entry, access_type);
+}
+
+pt_access_status_t inline v3_can_access_pdpe64(pdpe64_t * pdpe, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pdpe[PDPE64_INDEX(addr)];
+ return can_access_pt_entry(entry, access_type);
+}
+
+pt_access_status_t inline v3_can_access_pde64(pde64_t * pde, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pde[PDE32_INDEX(addr)];
+ return can_access_pt_entry(entry, access_type);
+}
+
+pt_access_status_t inline v3_can_access_pte64(pte64_t * pte, addr_t addr, pf_error_t access_type) {
+ gen_pt_t * entry = (gen_pt_t *)&pte[PTE64_INDEX(addr)];
+ return can_access_pt_entry(entry, access_type);
+}
+
+
+
+
+
/* We generate a page table to correspond to a given memory layout
* pulling pages from the mem_list when necessary
* If there are any gaps in the layout, we add them as unmapped pages
*/
-pde32_t * create_passthrough_pde32_pts(struct guest_info * guest_info) {
- ullong_t current_page_addr = 0;
+pde32_t * create_passthrough_pts_32(struct guest_info * guest_info) {
+ addr_t current_page_addr = 0;
int i, j;
struct shadow_map * map = &(guest_info->mem_map);
- pde32_t * pde = V3_AllocPages(1);
+ pde32_t * pde = V3_VAddr(V3_AllocPages(1));
for (i = 0; i < MAX_PDE32_ENTRIES; i++) {
int pte_present = 0;
- pte32_t * pte = V3_AllocPages(1);
+ pte32_t * pte = V3_VAddr(V3_AllocPages(1));
for (j = 0; j < MAX_PTE32_ENTRIES; j++) {
}
if (pte_present == 0) {
- V3_FreePage(pte);
+ V3_FreePage(V3_PAddr(pte));
pde[i].present = 0;
pde[i].writable = 0;
pde[i].large_page = 0;
pde[i].global_page = 0;
pde[i].vmm_info = 0;
- pde[i].pt_base_addr = PAGE_ALIGNED_ADDR(pte);
+ pde[i].pt_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pte));
}
}
}
+/* We generate a page table to correspond to a given memory layout
+ * pulling pages from the mem_list when necessary
+ * If there are any gaps in the layout, we add them as unmapped pages
+ */
+pdpe32pae_t * create_passthrough_pts_32PAE(struct guest_info * guest_info) {
+ addr_t current_page_addr = 0;
+ int i, j, k;
+ struct shadow_map * map = &(guest_info->mem_map);
+ pdpe32pae_t * pdpe = V3_VAddr(V3_AllocPages(1));
+ memset(pdpe, 0, PAGE_SIZE);
+ for (i = 0; i < MAX_PDPE32PAE_ENTRIES; i++) {
+ int pde_present = 0;
+ pde32pae_t * pde = V3_VAddr(V3_AllocPages(1));
+ for (j = 0; j < MAX_PDE32PAE_ENTRIES; j++) {
-void PrintPDE32(addr_t virtual_address, pde32_t * pde)
-{
- PrintDebug("PDE %p -> %p : present=%x, writable=%x, user=%x, wt=%x, cd=%x, accessed=%x, reserved=%x, largePages=%x, globalPage=%x, kernelInfo=%x\n",
- virtual_address,
- (void *) (pde->pt_base_addr << PAGE_POWER),
- pde->present,
- pde->writable,
- pde->user_page,
- pde->write_through,
- pde->cache_disable,
- pde->accessed,
- pde->reserved,
- pde->large_page,
- pde->global_page,
- pde->vmm_info);
-}
-
-void PrintPTE32(addr_t virtual_address, pte32_t * pte)
-{
- PrintDebug("PTE %p -> %p : present=%x, writable=%x, user=%x, wt=%x, cd=%x, accessed=%x, dirty=%x, pteAttribute=%x, globalPage=%x, vmm_info=%x\n",
- virtual_address,
- (void*)(pte->page_base_addr << PAGE_POWER),
- pte->present,
- pte->writable,
- pte->user_page,
- pte->write_through,
- pte->cache_disable,
- pte->accessed,
- pte->dirty,
- pte->pte_attr,
- pte->global_page,
- pte->vmm_info);
-}
-
-
-
-void PrintPD32(pde32_t * pde)
-{
- int i;
- PrintDebug("Page Directory at %p:\n", pde);
- for (i = 0; (i < MAX_PDE32_ENTRIES); i++) {
- if ( pde[i].present) {
- PrintPDE32((addr_t)(PAGE_SIZE * MAX_PTE32_ENTRIES * i), &(pde[i]));
+ int pte_present = 0;
+ pte32pae_t * pte = V3_VAddr(V3_AllocPages(1));
+
+
+ for (k = 0; k < MAX_PTE32PAE_ENTRIES; k++) {
+ struct shadow_region * region = get_shadow_region_by_addr(map, current_page_addr);
+
+ if (!region ||
+ (region->host_type == HOST_REGION_HOOK) ||
+ (region->host_type == HOST_REGION_UNALLOCATED) ||
+ (region->host_type == HOST_REGION_MEMORY_MAPPED_DEVICE) ||
+ (region->host_type == HOST_REGION_REMOTE) ||
+ (region->host_type == HOST_REGION_SWAPPED)) {
+ pte[k].present = 0;
+ pte[k].writable = 0;
+ pte[k].user_page = 0;
+ pte[k].write_through = 0;
+ pte[k].cache_disable = 0;
+ pte[k].accessed = 0;
+ pte[k].dirty = 0;
+ pte[k].pte_attr = 0;
+ pte[k].global_page = 0;
+ pte[k].vmm_info = 0;
+ pte[k].page_base_addr = 0;
+ pte[k].rsvd = 0;
+ } else {
+ addr_t host_addr;
+ pte[k].present = 1;
+ pte[k].writable = 1;
+ pte[k].user_page = 1;
+ pte[k].write_through = 0;
+ pte[k].cache_disable = 0;
+ pte[k].accessed = 0;
+ pte[k].dirty = 0;
+ pte[k].pte_attr = 0;
+ pte[k].global_page = 0;
+ pte[k].vmm_info = 0;
+
+ if (guest_pa_to_host_pa(guest_info, current_page_addr, &host_addr) == -1) {
+ // BIG ERROR
+ // PANIC
+ return NULL;
+ }
+
+ pte[k].page_base_addr = host_addr >> 12;
+ pte[k].rsvd = 0;
+
+ pte_present = 1;
+ }
+
+ current_page_addr += PAGE_SIZE;
+ }
+
+ if (pte_present == 0) {
+ V3_FreePage(V3_PAddr(pte));
+
+ pde[j].present = 0;
+ pde[j].writable = 0;
+ pde[j].user_page = 0;
+ pde[j].write_through = 0;
+ pde[j].cache_disable = 0;
+ pde[j].accessed = 0;
+ pde[j].avail = 0;
+ pde[j].large_page = 0;
+ pde[j].global_page = 0;
+ pde[j].vmm_info = 0;
+ pde[j].pt_base_addr = 0;
+ pde[j].rsvd = 0;
+ } else {
+ pde[j].present = 1;
+ pde[j].writable = 1;
+ pde[j].user_page = 1;
+ pde[j].write_through = 0;
+ pde[j].cache_disable = 0;
+ pde[j].accessed = 0;
+ pde[j].avail = 0;
+ pde[j].large_page = 0;
+ pde[j].global_page = 0;
+ pde[j].vmm_info = 0;
+ pde[j].pt_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pte));
+ pde[j].rsvd = 0;
+
+ pde_present = 1;
+ }
+
}
+
+ if (pde_present == 0) {
+ V3_FreePage(V3_PAddr(pde));
+
+ pdpe[i].present = 0;
+ pdpe[i].rsvd = 0;
+ pdpe[i].write_through = 0;
+ pdpe[i].cache_disable = 0;
+ pdpe[i].accessed = 0;
+ pdpe[i].avail = 0;
+ pdpe[i].rsvd2 = 0;
+ pdpe[i].vmm_info = 0;
+ pdpe[i].pd_base_addr = 0;
+ pdpe[i].rsvd3 = 0;
+ } else {
+ pdpe[i].present = 1;
+ pdpe[i].rsvd = 0;
+ pdpe[i].write_through = 0;
+ pdpe[i].cache_disable = 0;
+ pdpe[i].accessed = 0;
+ pdpe[i].avail = 0;
+ pdpe[i].rsvd2 = 0;
+ pdpe[i].vmm_info = 0;
+ pdpe[i].pd_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pde));
+ pdpe[i].rsvd3 = 0;
+ }
+
}
-}
-void PrintPT32(addr_t starting_address, pte32_t * pte)
-{
- int i;
- PrintDebug("Page Table at %p:\n", pte);
- for (i = 0; (i < MAX_PTE32_ENTRIES) ; i++) {
- if (pte[i].present) {
- PrintPTE32(starting_address + (PAGE_SIZE * i), &(pte[i]));
- }
- }
+ return pdpe;
}
-void PrintDebugPageTables(pde32_t * pde)
-{
- int i;
+
+pml4e64_t * create_passthrough_pts_64(struct guest_info * info) {
+ addr_t current_page_addr = 0;
+ int i, j, k, m;
+ struct shadow_map * map = &(info->mem_map);
- PrintDebug("Dumping the pages starting with the pde page at %p\n", pde);
+ pml4e64_t * pml = V3_VAddr(V3_AllocPages(1));
+
+ for (i = 0; i < 1; i++) {
+ int pdpe_present = 0;
+ pdpe64_t * pdpe = V3_VAddr(V3_AllocPages(1));
+
+ for (j = 0; j < 20; j++) {
+ int pde_present = 0;
+ pde64_t * pde = V3_VAddr(V3_AllocPages(1));
+
+ for (k = 0; k < MAX_PDE64_ENTRIES; k++) {
+ int pte_present = 0;
+ pte64_t * pte = V3_VAddr(V3_AllocPages(1));
+
+
+ for (m = 0; m < MAX_PTE64_ENTRIES; m++) {
+ struct shadow_region * region = get_shadow_region_by_addr(map, current_page_addr);
+
+
+
+ if (!region ||
+ (region->host_type == HOST_REGION_HOOK) ||
+ (region->host_type == HOST_REGION_UNALLOCATED) ||
+ (region->host_type == HOST_REGION_MEMORY_MAPPED_DEVICE) ||
+ (region->host_type == HOST_REGION_REMOTE) ||
+ (region->host_type == HOST_REGION_SWAPPED)) {
+ pte[m].present = 0;
+ pte[m].writable = 0;
+ pte[m].user_page = 0;
+ pte[m].write_through = 0;
+ pte[m].cache_disable = 0;
+ pte[m].accessed = 0;
+ pte[m].dirty = 0;
+ pte[m].pte_attr = 0;
+ pte[m].global_page = 0;
+ pte[m].vmm_info = 0;
+ pte[m].page_base_addr = 0;
+ } else {
+ addr_t host_addr;
+ pte[m].present = 1;
+ pte[m].writable = 1;
+ pte[m].user_page = 1;
+ pte[m].write_through = 0;
+ pte[m].cache_disable = 0;
+ pte[m].accessed = 0;
+ pte[m].dirty = 0;
+ pte[m].pte_attr = 0;
+ pte[m].global_page = 0;
+ pte[m].vmm_info = 0;
+
+ if (guest_pa_to_host_pa(info, current_page_addr, &host_addr) == -1) {
+ // BIG ERROR
+ // PANIC
+ return NULL;
+ }
+
+ pte[m].page_base_addr = PAGE_BASE_ADDR(host_addr);
+
+ //PrintPTE64(current_page_addr, &(pte[m]));
+
+ pte_present = 1;
+ }
+
+
+
+
+ current_page_addr += PAGE_SIZE;
+ }
+
+ if (pte_present == 0) {
+ V3_FreePage(V3_PAddr(pte));
+
+ pde[k].present = 0;
+ pde[k].writable = 0;
+ pde[k].user_page = 0;
+ pde[k].write_through = 0;
+ pde[k].cache_disable = 0;
+ pde[k].accessed = 0;
+ pde[k].avail = 0;
+ pde[k].large_page = 0;
+ //pde[k].global_page = 0;
+ pde[k].vmm_info = 0;
+ pde[k].pt_base_addr = 0;
+ } else {
+ pde[k].present = 1;
+ pde[k].writable = 1;
+ pde[k].user_page = 1;
+ pde[k].write_through = 0;
+ pde[k].cache_disable = 0;
+ pde[k].accessed = 0;
+ pde[k].avail = 0;
+ pde[k].large_page = 0;
+ //pde[k].global_page = 0;
+ pde[k].vmm_info = 0;
+ pde[k].pt_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pte));
+
+ pde_present = 1;
+ }
+ }
- for (i = 0; (i < MAX_PDE32_ENTRIES); i++) {
- if (pde[i].present) {
- PrintPDE32((addr_t)(PAGE_SIZE * MAX_PTE32_ENTRIES * i), &(pde[i]));
- PrintPT32((addr_t)(PAGE_SIZE * MAX_PTE32_ENTRIES * i), (pte32_t *)(pde[i].pt_base_addr << PAGE_POWER));
+ if (pde_present == 0) {
+ V3_FreePage(V3_PAddr(pde));
+
+ pdpe[j].present = 0;
+ pdpe[j].writable = 0;
+ pdpe[j].user_page = 0;
+ pdpe[j].write_through = 0;
+ pdpe[j].cache_disable = 0;
+ pdpe[j].accessed = 0;
+ pdpe[j].avail = 0;
+ pdpe[j].large_page = 0;
+ //pdpe[j].global_page = 0;
+ pdpe[j].vmm_info = 0;
+ pdpe[j].pd_base_addr = 0;
+ } else {
+ pdpe[j].present = 1;
+ pdpe[j].writable = 1;
+ pdpe[j].user_page = 1;
+ pdpe[j].write_through = 0;
+ pdpe[j].cache_disable = 0;
+ pdpe[j].accessed = 0;
+ pdpe[j].avail = 0;
+ pdpe[j].large_page = 0;
+ //pdpe[j].global_page = 0;
+ pdpe[j].vmm_info = 0;
+ pdpe[j].pd_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pde));
+
+
+ pdpe_present = 1;
+ }
+
+ }
+
+ PrintDebug("PML index=%d\n", i);
+
+ if (pdpe_present == 0) {
+ V3_FreePage(V3_PAddr(pdpe));
+
+ pml[i].present = 0;
+ pml[i].writable = 0;
+ pml[i].user_page = 0;
+ pml[i].write_through = 0;
+ pml[i].cache_disable = 0;
+ pml[i].accessed = 0;
+ pml[i].reserved = 0;
+ //pml[i].large_page = 0;
+ //pml[i].global_page = 0;
+ pml[i].vmm_info = 0;
+ pml[i].pdp_base_addr = 0;
+ } else {
+ pml[i].present = 1;
+ pml[i].writable = 1;
+ pml[i].user_page = 1;
+ pml[i].write_through = 0;
+ pml[i].cache_disable = 0;
+ pml[i].accessed = 0;
+ pml[i].reserved = 0;
+ //pml[i].large_page = 0;
+ //pml[i].global_page = 0;
+ pml[i].vmm_info = 0;
+ pml[i].pdp_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pdpe));
}
}
+
+ return pml;
}
-
+
+
+
+
