2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Steven Jaconette <stevenjaconette2007@u.northwestern.edu>
11 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
12 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
13 * All rights reserved.
15 * Author: Steven Jaconette <stevenjaconette2007@u.northwestern.edu>
17 * This is free software. You are permitted to use,
18 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
21 #ifndef __VMM_DIRECT_PAGING_32_H__
22 #define __VMM_DIRECT_PAGING_32_H__
24 #include <palacios/vmm_mem.h>
25 #include <palacios/vmm_paging.h>
26 #include <palacios/vmm.h>
27 #include <palacios/vm_guest_mem.h>
28 #include <palacios/vm_guest.h>
29 #include <palacios/vmm_ctrl_regs.h>
32 static inline int handle_passthrough_pagefault_32(struct guest_info * info,
34 pf_error_t error_code) {
35 // Check to see if pde and pte exist (create them if not)
40 int pde_index = PDE32_INDEX(fault_addr);
41 int pte_index = PTE32_INDEX(fault_addr);
43 struct v3_mem_region * region = v3_get_mem_region(info->vm_info, info->vcpu_id, fault_addr);
46 PrintError(info->vm_info, info, "Invalid region in passthrough page fault 32, addr=%p\n",
51 // Lookup the correct PDE address based on the PAGING MODE
52 if (info->shdw_pg_mode == SHADOW_PAGING) {
53 pde = CR3_TO_PDE32_VA(info->ctrl_regs.cr3);
55 pde = CR3_TO_PDE32_VA(info->direct_map_pt);
59 // Fix up the PDE entry
60 if (pde[pde_index].present == 0) {
61 pte = (pte32_t *)create_generic_pt_page(info);
63 pde[pde_index].present = 1;
64 pde[pde_index].writable = 1;
65 pde[pde_index].user_page = 1;
66 pde[pde_index].pt_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pte));
69 pte = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pde[pde_index].pt_base_addr));
72 // Fix up the PTE entry
73 if (pte[pte_index].present == 0) {
76 if ((region->flags.alloced == 1) &&
77 (region->flags.read == 1)) {
79 pte[pte_index].user_page = 1;
81 pte[pte_index].present = 1;
83 if (region->flags.write == 1) {
84 pte[pte_index].writable = 1;
86 pte[pte_index].writable = 0;
89 if (v3_gpa_to_hpa(info, fault_addr, &host_addr) == -1) {
90 PrintError(info->vm_info, info, "Could not translate fault address (%p)\n", (void *)fault_addr);
94 pte[pte_index].page_base_addr = PAGE_BASE_ADDR(host_addr);
96 return region->unhandled(info, fault_addr, fault_addr, region, error_code);
99 // We fix all permissions on the first pass,
100 // so we only get here if its an unhandled exception
101 return region->unhandled(info, fault_addr, fault_addr, region, error_code);
110 static inline int invalidate_addr_32_internal(struct guest_info * info, addr_t inv_addr,
111 addr_t *actual_start, uint64_t *actual_size) {
112 pde32_t * pde = NULL;
113 pte32_t * pte = NULL;
118 // clear the page table entry
119 int pde_index = PDE32_INDEX(inv_addr);
120 int pte_index = PTE32_INDEX(inv_addr);
123 // Lookup the correct PDE address based on the PAGING MODE
124 if (info->shdw_pg_mode == SHADOW_PAGING) {
125 pde = CR3_TO_PDE32_VA(info->ctrl_regs.cr3);
127 pde = CR3_TO_PDE32_VA(info->direct_map_pt);
130 if (pde[pde_index].present == 0) {
131 *actual_start = BASE_TO_PAGE_ADDR_4MB(PAGE_BASE_ADDR_4MB(inv_addr));
132 *actual_size = PAGE_SIZE_4MB;
134 } else if (pde[pde_index].large_page) {
135 pde[pde_index].present = 0;
136 pde[pde_index].writable = 0;
137 pde[pde_index].user_page = 0;
138 *actual_start = BASE_TO_PAGE_ADDR_4MB(PAGE_BASE_ADDR_4MB(inv_addr));
139 *actual_size = PAGE_SIZE_4MB;
143 pte = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pde[pde_index].pt_base_addr));
145 pte[pte_index].present = 0;
146 pte[pte_index].writable = 0;
147 pte[pte_index].user_page = 0;
149 *actual_start = BASE_TO_PAGE_ADDR_4KB(PAGE_BASE_ADDR_4KB(inv_addr));
150 *actual_size = PAGE_SIZE_4KB;
156 static inline int invalidate_addr_32(struct guest_info * core, addr_t inv_addr)
161 return invalidate_addr_32_internal(core,inv_addr,&start,&len);
164 static inline int invalidate_addr_32_range(struct guest_info * core, addr_t inv_addr_start, addr_t inv_addr_end)
171 for (next=inv_addr_start; next<=inv_addr_end; ) {
172 rc = invalidate_addr_32_internal(core,next,&start, &len);