Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Kernel-based Virtual Machine driver for Linux |
| 3 | * |
| 4 | * This module enables machines with Intel VT-x extensions to run virtual |
| 5 | * machines without emulation or binary translation. |
| 6 | * |
| 7 | * MMU support |
| 8 | * |
| 9 | * Copyright (C) 2006 Qumranet, Inc. |
| 10 | * |
| 11 | * Authors: |
| 12 | * Yaniv Kamay <yaniv@qumranet.com> |
| 13 | * Avi Kivity <avi@qumranet.com> |
| 14 | * |
| 15 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 16 | * the COPYING file in the top-level directory. |
| 17 | * |
| 18 | */ |
| 19 | |
| 20 | /* |
| 21 | * We need the mmu code to access both 32-bit and 64-bit guest ptes, |
| 22 | * so the code in this file is compiled twice, once per pte size. |
| 23 | */ |
| 24 | |
| 25 | #if PTTYPE == 64 |
| 26 | #define pt_element_t u64 |
| 27 | #define guest_walker guest_walker64 |
| 28 | #define FNAME(name) paging##64_##name |
| 29 | #define PT_BASE_ADDR_MASK PT64_BASE_ADDR_MASK |
| 30 | #define PT_DIR_BASE_ADDR_MASK PT64_DIR_BASE_ADDR_MASK |
| 31 | #define PT_INDEX(addr, level) PT64_INDEX(addr, level) |
| 32 | #define SHADOW_PT_INDEX(addr, level) PT64_INDEX(addr, level) |
| 33 | #define PT_LEVEL_MASK(level) PT64_LEVEL_MASK(level) |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame^] | 34 | #define PT_LEVEL_BITS PT64_LEVEL_BITS |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 35 | #ifdef CONFIG_X86_64 |
| 36 | #define PT_MAX_FULL_LEVELS 4 |
| 37 | #else |
| 38 | #define PT_MAX_FULL_LEVELS 2 |
| 39 | #endif |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 40 | #elif PTTYPE == 32 |
| 41 | #define pt_element_t u32 |
| 42 | #define guest_walker guest_walker32 |
| 43 | #define FNAME(name) paging##32_##name |
| 44 | #define PT_BASE_ADDR_MASK PT32_BASE_ADDR_MASK |
| 45 | #define PT_DIR_BASE_ADDR_MASK PT32_DIR_BASE_ADDR_MASK |
| 46 | #define PT_INDEX(addr, level) PT32_INDEX(addr, level) |
| 47 | #define SHADOW_PT_INDEX(addr, level) PT64_INDEX(addr, level) |
| 48 | #define PT_LEVEL_MASK(level) PT32_LEVEL_MASK(level) |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame^] | 49 | #define PT_LEVEL_BITS PT32_LEVEL_BITS |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 50 | #define PT_MAX_FULL_LEVELS 2 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 51 | #else |
| 52 | #error Invalid PTTYPE value |
| 53 | #endif |
| 54 | |
| 55 | /* |
| 56 | * The guest_walker structure emulates the behavior of the hardware page |
| 57 | * table walker. |
| 58 | */ |
| 59 | struct guest_walker { |
| 60 | int level; |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 61 | gfn_t table_gfn[PT_MAX_FULL_LEVELS]; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 62 | pt_element_t *table; |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 63 | pt_element_t pte; |
Avi Kivity | ac79c97 | 2007-01-05 16:36:40 -0800 | [diff] [blame] | 64 | pt_element_t *ptep; |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 65 | struct page *page; |
| 66 | int index; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 67 | pt_element_t inherited_ar; |
Avi Kivity | 815af8d | 2007-01-05 16:36:44 -0800 | [diff] [blame] | 68 | gfn_t gfn; |
Avi Kivity | 7993ba4 | 2007-01-26 00:56:41 -0800 | [diff] [blame] | 69 | u32 error_code; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 70 | }; |
| 71 | |
Avi Kivity | ac79c97 | 2007-01-05 16:36:40 -0800 | [diff] [blame] | 72 | /* |
| 73 | * Fetch a guest pte for a guest virtual address |
| 74 | */ |
Avi Kivity | 7993ba4 | 2007-01-26 00:56:41 -0800 | [diff] [blame] | 75 | static int FNAME(walk_addr)(struct guest_walker *walker, |
| 76 | struct kvm_vcpu *vcpu, gva_t addr, |
Avi Kivity | 73b1087 | 2007-01-26 00:56:41 -0800 | [diff] [blame] | 77 | int write_fault, int user_fault, int fetch_fault) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 78 | { |
| 79 | hpa_t hpa; |
| 80 | struct kvm_memory_slot *slot; |
Avi Kivity | ac79c97 | 2007-01-05 16:36:40 -0800 | [diff] [blame] | 81 | pt_element_t *ptep; |
Avi Kivity | 1b0973b | 2007-01-05 16:36:41 -0800 | [diff] [blame] | 82 | pt_element_t root; |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 83 | gfn_t table_gfn; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 84 | |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 85 | pgprintk("%s: addr %lx\n", __FUNCTION__, addr); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 86 | walker->level = vcpu->mmu.root_level; |
Avi Kivity | 1b0973b | 2007-01-05 16:36:41 -0800 | [diff] [blame] | 87 | walker->table = NULL; |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 88 | walker->page = NULL; |
| 89 | walker->ptep = NULL; |
Avi Kivity | 1b0973b | 2007-01-05 16:36:41 -0800 | [diff] [blame] | 90 | root = vcpu->cr3; |
| 91 | #if PTTYPE == 64 |
| 92 | if (!is_long_mode(vcpu)) { |
| 93 | walker->ptep = &vcpu->pdptrs[(addr >> 30) & 3]; |
| 94 | root = *walker->ptep; |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 95 | walker->pte = root; |
Avi Kivity | 1b0973b | 2007-01-05 16:36:41 -0800 | [diff] [blame] | 96 | if (!(root & PT_PRESENT_MASK)) |
Avi Kivity | 7993ba4 | 2007-01-26 00:56:41 -0800 | [diff] [blame] | 97 | goto not_present; |
Avi Kivity | 1b0973b | 2007-01-05 16:36:41 -0800 | [diff] [blame] | 98 | --walker->level; |
| 99 | } |
| 100 | #endif |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 101 | table_gfn = (root & PT64_BASE_ADDR_MASK) >> PAGE_SHIFT; |
| 102 | walker->table_gfn[walker->level - 1] = table_gfn; |
| 103 | pgprintk("%s: table_gfn[%d] %lx\n", __FUNCTION__, |
| 104 | walker->level - 1, table_gfn); |
| 105 | slot = gfn_to_memslot(vcpu->kvm, table_gfn); |
Avi Kivity | 1b0973b | 2007-01-05 16:36:41 -0800 | [diff] [blame] | 106 | hpa = safe_gpa_to_hpa(vcpu, root & PT64_BASE_ADDR_MASK); |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 107 | walker->page = pfn_to_page(hpa >> PAGE_SHIFT); |
| 108 | walker->table = kmap_atomic(walker->page, KM_USER0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 109 | |
Avi Kivity | a9058ec | 2006-12-29 16:49:37 -0800 | [diff] [blame] | 110 | ASSERT((!is_long_mode(vcpu) && is_pae(vcpu)) || |
Rusty Russell | f802a30 | 2007-07-17 23:32:55 +1000 | [diff] [blame] | 111 | (vcpu->cr3 & CR3_NONPAE_RESERVED_BITS) == 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 112 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 113 | walker->inherited_ar = PT_USER_MASK | PT_WRITABLE_MASK; |
Avi Kivity | ac79c97 | 2007-01-05 16:36:40 -0800 | [diff] [blame] | 114 | |
| 115 | for (;;) { |
| 116 | int index = PT_INDEX(addr, walker->level); |
| 117 | hpa_t paddr; |
| 118 | |
| 119 | ptep = &walker->table[index]; |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 120 | walker->index = index; |
Avi Kivity | ac79c97 | 2007-01-05 16:36:40 -0800 | [diff] [blame] | 121 | ASSERT(((unsigned long)walker->table & PAGE_MASK) == |
| 122 | ((unsigned long)ptep & PAGE_MASK)); |
| 123 | |
Avi Kivity | 815af8d | 2007-01-05 16:36:44 -0800 | [diff] [blame] | 124 | if (!is_present_pte(*ptep)) |
Avi Kivity | 7993ba4 | 2007-01-26 00:56:41 -0800 | [diff] [blame] | 125 | goto not_present; |
| 126 | |
| 127 | if (write_fault && !is_writeble_pte(*ptep)) |
| 128 | if (user_fault || is_write_protection(vcpu)) |
| 129 | goto access_error; |
| 130 | |
| 131 | if (user_fault && !(*ptep & PT_USER_MASK)) |
| 132 | goto access_error; |
| 133 | |
Avi Kivity | 73b1087 | 2007-01-26 00:56:41 -0800 | [diff] [blame] | 134 | #if PTTYPE == 64 |
| 135 | if (fetch_fault && is_nx(vcpu) && (*ptep & PT64_NX_MASK)) |
| 136 | goto access_error; |
| 137 | #endif |
| 138 | |
Avi Kivity | bf3f8e8 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 139 | if (!(*ptep & PT_ACCESSED_MASK)) { |
| 140 | mark_page_dirty(vcpu->kvm, table_gfn); |
| 141 | *ptep |= PT_ACCESSED_MASK; |
| 142 | } |
Avi Kivity | ac79c97 | 2007-01-05 16:36:40 -0800 | [diff] [blame] | 143 | |
Avi Kivity | 815af8d | 2007-01-05 16:36:44 -0800 | [diff] [blame] | 144 | if (walker->level == PT_PAGE_TABLE_LEVEL) { |
| 145 | walker->gfn = (*ptep & PT_BASE_ADDR_MASK) |
| 146 | >> PAGE_SHIFT; |
| 147 | break; |
| 148 | } |
| 149 | |
| 150 | if (walker->level == PT_DIRECTORY_LEVEL |
| 151 | && (*ptep & PT_PAGE_SIZE_MASK) |
| 152 | && (PTTYPE == 64 || is_pse(vcpu))) { |
| 153 | walker->gfn = (*ptep & PT_DIR_BASE_ADDR_MASK) |
| 154 | >> PAGE_SHIFT; |
| 155 | walker->gfn += PT_INDEX(addr, PT_PAGE_TABLE_LEVEL); |
| 156 | break; |
| 157 | } |
| 158 | |
Avi Kivity | ca5aac1 | 2007-03-20 14:29:06 +0200 | [diff] [blame] | 159 | walker->inherited_ar &= walker->table[index]; |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 160 | table_gfn = (*ptep & PT_BASE_ADDR_MASK) >> PAGE_SHIFT; |
Avi Kivity | ac79c97 | 2007-01-05 16:36:40 -0800 | [diff] [blame] | 161 | kunmap_atomic(walker->table, KM_USER0); |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 162 | paddr = safe_gpa_to_hpa(vcpu, table_gfn << PAGE_SHIFT); |
| 163 | walker->page = pfn_to_page(paddr >> PAGE_SHIFT); |
| 164 | walker->table = kmap_atomic(walker->page, KM_USER0); |
Avi Kivity | ac79c97 | 2007-01-05 16:36:40 -0800 | [diff] [blame] | 165 | --walker->level; |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 166 | walker->table_gfn[walker->level - 1 ] = table_gfn; |
| 167 | pgprintk("%s: table_gfn[%d] %lx\n", __FUNCTION__, |
| 168 | walker->level - 1, table_gfn); |
Avi Kivity | ac79c97 | 2007-01-05 16:36:40 -0800 | [diff] [blame] | 169 | } |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 170 | walker->pte = *ptep; |
| 171 | if (walker->page) |
| 172 | walker->ptep = NULL; |
| 173 | if (walker->table) |
| 174 | kunmap_atomic(walker->table, KM_USER0); |
Avi Kivity | 374cbac | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 175 | pgprintk("%s: pte %llx\n", __FUNCTION__, (u64)*ptep); |
Avi Kivity | 7993ba4 | 2007-01-26 00:56:41 -0800 | [diff] [blame] | 176 | return 1; |
| 177 | |
| 178 | not_present: |
| 179 | walker->error_code = 0; |
| 180 | goto err; |
| 181 | |
| 182 | access_error: |
| 183 | walker->error_code = PFERR_PRESENT_MASK; |
| 184 | |
| 185 | err: |
| 186 | if (write_fault) |
| 187 | walker->error_code |= PFERR_WRITE_MASK; |
| 188 | if (user_fault) |
| 189 | walker->error_code |= PFERR_USER_MASK; |
Avi Kivity | 73b1087 | 2007-01-26 00:56:41 -0800 | [diff] [blame] | 190 | if (fetch_fault) |
| 191 | walker->error_code |= PFERR_FETCH_MASK; |
Avi Kivity | 1b0973b | 2007-01-05 16:36:41 -0800 | [diff] [blame] | 192 | if (walker->table) |
| 193 | kunmap_atomic(walker->table, KM_USER0); |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 194 | return 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 195 | } |
| 196 | |
Avi Kivity | bf3f8e8 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 197 | static void FNAME(mark_pagetable_dirty)(struct kvm *kvm, |
| 198 | struct guest_walker *walker) |
| 199 | { |
| 200 | mark_page_dirty(kvm, walker->table_gfn[walker->level - 1]); |
| 201 | } |
| 202 | |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 203 | static void FNAME(set_pte_common)(struct kvm_vcpu *vcpu, |
| 204 | u64 *shadow_pte, |
| 205 | gpa_t gaddr, |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 206 | pt_element_t gpte, |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 207 | u64 access_bits, |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 208 | int user_fault, |
Avi Kivity | 63b1ad2 | 2007-05-31 11:56:54 +0300 | [diff] [blame] | 209 | int write_fault, |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 210 | int *ptwrite, |
| 211 | struct guest_walker *walker, |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 212 | gfn_t gfn) |
| 213 | { |
| 214 | hpa_t paddr; |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 215 | int dirty = gpte & PT_DIRTY_MASK; |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame^] | 216 | u64 spte; |
| 217 | int was_rmapped = is_rmap_pte(*shadow_pte); |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 218 | |
| 219 | pgprintk("%s: spte %llx gpte %llx access %llx write_fault %d" |
| 220 | " user_fault %d gfn %lx\n", |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame^] | 221 | __FUNCTION__, *shadow_pte, (u64)gpte, access_bits, |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 222 | write_fault, user_fault, gfn); |
| 223 | |
| 224 | if (write_fault && !dirty) { |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 225 | pt_element_t *guest_ent, *tmp = NULL; |
| 226 | |
| 227 | if (walker->ptep) |
| 228 | guest_ent = walker->ptep; |
| 229 | else { |
| 230 | tmp = kmap_atomic(walker->page, KM_USER0); |
| 231 | guest_ent = &tmp[walker->index]; |
| 232 | } |
| 233 | |
| 234 | *guest_ent |= PT_DIRTY_MASK; |
| 235 | if (!walker->ptep) |
| 236 | kunmap_atomic(tmp, KM_USER0); |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 237 | dirty = 1; |
| 238 | FNAME(mark_pagetable_dirty)(vcpu->kvm, walker); |
| 239 | } |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 240 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame^] | 241 | spte = PT_PRESENT_MASK | PT_ACCESSED_MASK | PT_DIRTY_MASK; |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 242 | spte |= gpte & PT64_NX_MASK; |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 243 | if (!dirty) |
| 244 | access_bits &= ~PT_WRITABLE_MASK; |
| 245 | |
| 246 | paddr = gpa_to_hpa(vcpu, gaddr & PT64_BASE_ADDR_MASK); |
| 247 | |
Avi Kivity | 0d551bb | 2007-05-31 15:23:35 +0300 | [diff] [blame] | 248 | spte |= PT_PRESENT_MASK; |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 249 | if (access_bits & PT_USER_MASK) |
Avi Kivity | 0d551bb | 2007-05-31 15:23:35 +0300 | [diff] [blame] | 250 | spte |= PT_USER_MASK; |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 251 | |
| 252 | if (is_error_hpa(paddr)) { |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame^] | 253 | set_shadow_pte(shadow_pte, |
| 254 | shadow_trap_nonpresent_pte | PT_SHADOW_IO_MARK); |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 255 | return; |
| 256 | } |
| 257 | |
Avi Kivity | 0d551bb | 2007-05-31 15:23:35 +0300 | [diff] [blame] | 258 | spte |= paddr; |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 259 | |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 260 | if ((access_bits & PT_WRITABLE_MASK) |
| 261 | || (write_fault && !is_write_protection(vcpu) && !user_fault)) { |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 262 | struct kvm_mmu_page *shadow; |
| 263 | |
Avi Kivity | 0d551bb | 2007-05-31 15:23:35 +0300 | [diff] [blame] | 264 | spte |= PT_WRITABLE_MASK; |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 265 | if (user_fault) { |
| 266 | mmu_unshadow(vcpu, gfn); |
| 267 | goto unshadowed; |
| 268 | } |
| 269 | |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 270 | shadow = kvm_mmu_lookup_page(vcpu, gfn); |
| 271 | if (shadow) { |
| 272 | pgprintk("%s: found shadow page for %lx, marking ro\n", |
| 273 | __FUNCTION__, gfn); |
| 274 | access_bits &= ~PT_WRITABLE_MASK; |
Avi Kivity | 0d551bb | 2007-05-31 15:23:35 +0300 | [diff] [blame] | 275 | if (is_writeble_pte(spte)) { |
| 276 | spte &= ~PT_WRITABLE_MASK; |
Christian Ehrhardt | cbdd1be | 2007-09-09 15:41:59 +0300 | [diff] [blame] | 277 | kvm_x86_ops->tlb_flush(vcpu); |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 278 | } |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 279 | if (write_fault) |
| 280 | *ptwrite = 1; |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 281 | } |
| 282 | } |
| 283 | |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 284 | unshadowed: |
| 285 | |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 286 | if (access_bits & PT_WRITABLE_MASK) |
| 287 | mark_page_dirty(vcpu->kvm, gaddr >> PAGE_SHIFT); |
| 288 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame^] | 289 | pgprintk("%s: setting spte %llx\n", __FUNCTION__, spte); |
Avi Kivity | e663ee6 | 2007-05-31 15:46:04 +0300 | [diff] [blame] | 290 | set_shadow_pte(shadow_pte, spte); |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 291 | page_header_update_slot(vcpu->kvm, shadow_pte, gaddr); |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 292 | if (!was_rmapped) |
| 293 | rmap_add(vcpu, shadow_pte); |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 294 | } |
| 295 | |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 296 | static void FNAME(set_pte)(struct kvm_vcpu *vcpu, pt_element_t gpte, |
Avi Kivity | 63b1ad2 | 2007-05-31 11:56:54 +0300 | [diff] [blame] | 297 | u64 *shadow_pte, u64 access_bits, |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 298 | int user_fault, int write_fault, int *ptwrite, |
| 299 | struct guest_walker *walker, gfn_t gfn) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 300 | { |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 301 | access_bits &= gpte; |
| 302 | FNAME(set_pte_common)(vcpu, shadow_pte, gpte & PT_BASE_ADDR_MASK, |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 303 | gpte, access_bits, user_fault, write_fault, |
| 304 | ptwrite, walker, gfn); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 305 | } |
| 306 | |
Avi Kivity | 0028425 | 2007-05-01 16:53:31 +0300 | [diff] [blame] | 307 | static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *page, |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame^] | 308 | u64 *spte, const void *pte, int bytes, |
| 309 | int offset_in_pte) |
Avi Kivity | 0028425 | 2007-05-01 16:53:31 +0300 | [diff] [blame] | 310 | { |
| 311 | pt_element_t gpte; |
| 312 | |
Avi Kivity | 0028425 | 2007-05-01 16:53:31 +0300 | [diff] [blame] | 313 | gpte = *(const pt_element_t *)pte; |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame^] | 314 | if (~gpte & (PT_PRESENT_MASK | PT_ACCESSED_MASK)) { |
| 315 | if (!offset_in_pte && !is_present_pte(gpte)) |
| 316 | set_shadow_pte(spte, shadow_notrap_nonpresent_pte); |
| 317 | return; |
| 318 | } |
| 319 | if (bytes < sizeof(pt_element_t)) |
Avi Kivity | 0028425 | 2007-05-01 16:53:31 +0300 | [diff] [blame] | 320 | return; |
| 321 | pgprintk("%s: gpte %llx spte %p\n", __FUNCTION__, (u64)gpte, spte); |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 322 | FNAME(set_pte)(vcpu, gpte, spte, PT_USER_MASK | PT_WRITABLE_MASK, 0, |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 323 | 0, NULL, NULL, |
Avi Kivity | 0028425 | 2007-05-01 16:53:31 +0300 | [diff] [blame] | 324 | (gpte & PT_BASE_ADDR_MASK) >> PAGE_SHIFT); |
| 325 | } |
| 326 | |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 327 | static void FNAME(set_pde)(struct kvm_vcpu *vcpu, pt_element_t gpde, |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 328 | u64 *shadow_pte, u64 access_bits, |
| 329 | int user_fault, int write_fault, int *ptwrite, |
| 330 | struct guest_walker *walker, gfn_t gfn) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 331 | { |
| 332 | gpa_t gaddr; |
| 333 | |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 334 | access_bits &= gpde; |
Avi Kivity | 815af8d | 2007-01-05 16:36:44 -0800 | [diff] [blame] | 335 | gaddr = (gpa_t)gfn << PAGE_SHIFT; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 336 | if (PTTYPE == 32 && is_cpuid_PSE36()) |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 337 | gaddr |= (gpde & PT32_DIR_PSE36_MASK) << |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 338 | (32 - PT32_DIR_PSE36_SHIFT); |
Avi Kivity | e60d75e | 2007-05-30 19:31:17 +0300 | [diff] [blame] | 339 | FNAME(set_pte_common)(vcpu, shadow_pte, gaddr, |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 340 | gpde, access_bits, user_fault, write_fault, |
| 341 | ptwrite, walker, gfn); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 345 | * Fetch a shadow pte for a specific level in the paging hierarchy. |
| 346 | */ |
| 347 | static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr, |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 348 | struct guest_walker *walker, |
| 349 | int user_fault, int write_fault, int *ptwrite) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 350 | { |
| 351 | hpa_t shadow_addr; |
| 352 | int level; |
Avi Kivity | ef0197e | 2007-05-30 14:21:51 +0300 | [diff] [blame] | 353 | u64 *shadow_ent; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 354 | u64 *prev_shadow_ent = NULL; |
Avi Kivity | ac79c97 | 2007-01-05 16:36:40 -0800 | [diff] [blame] | 355 | |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 356 | if (!is_present_pte(walker->pte)) |
Avi Kivity | ac79c97 | 2007-01-05 16:36:40 -0800 | [diff] [blame] | 357 | return NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 358 | |
| 359 | shadow_addr = vcpu->mmu.root_hpa; |
| 360 | level = vcpu->mmu.shadow_root_level; |
Avi Kivity | aef3d3f | 2007-01-05 16:36:41 -0800 | [diff] [blame] | 361 | if (level == PT32E_ROOT_LEVEL) { |
| 362 | shadow_addr = vcpu->mmu.pae_root[(addr >> 30) & 3]; |
| 363 | shadow_addr &= PT64_BASE_ADDR_MASK; |
| 364 | --level; |
| 365 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 366 | |
| 367 | for (; ; level--) { |
| 368 | u32 index = SHADOW_PT_INDEX(addr, level); |
Avi Kivity | 25c0de2 | 2007-01-05 16:36:42 -0800 | [diff] [blame] | 369 | struct kvm_mmu_page *shadow_page; |
Avi Kivity | 8c7bb72 | 2006-12-13 00:34:02 -0800 | [diff] [blame] | 370 | u64 shadow_pte; |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 371 | int metaphysical; |
| 372 | gfn_t table_gfn; |
Avi Kivity | d28c6cfb | 2007-03-23 09:55:25 +0200 | [diff] [blame] | 373 | unsigned hugepage_access = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 374 | |
Avi Kivity | ef0197e | 2007-05-30 14:21:51 +0300 | [diff] [blame] | 375 | shadow_ent = ((u64 *)__va(shadow_addr)) + index; |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame^] | 376 | if (is_shadow_present_pte(*shadow_ent)) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 377 | if (level == PT_PAGE_TABLE_LEVEL) |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 378 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 379 | shadow_addr = *shadow_ent & PT64_BASE_ADDR_MASK; |
| 380 | prev_shadow_ent = shadow_ent; |
| 381 | continue; |
| 382 | } |
| 383 | |
Avi Kivity | ef0197e | 2007-05-30 14:21:51 +0300 | [diff] [blame] | 384 | if (level == PT_PAGE_TABLE_LEVEL) |
| 385 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 386 | |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 387 | if (level - 1 == PT_PAGE_TABLE_LEVEL |
| 388 | && walker->level == PT_DIRECTORY_LEVEL) { |
| 389 | metaphysical = 1; |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 390 | hugepage_access = walker->pte; |
Avi Kivity | d28c6cfb | 2007-03-23 09:55:25 +0200 | [diff] [blame] | 391 | hugepage_access &= PT_USER_MASK | PT_WRITABLE_MASK; |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 392 | if (walker->pte & PT64_NX_MASK) |
Avi Kivity | d55e2cb | 2007-07-10 17:50:55 +0300 | [diff] [blame] | 393 | hugepage_access |= (1 << 2); |
Avi Kivity | d28c6cfb | 2007-03-23 09:55:25 +0200 | [diff] [blame] | 394 | hugepage_access >>= PT_WRITABLE_SHIFT; |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 395 | table_gfn = (walker->pte & PT_BASE_ADDR_MASK) |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 396 | >> PAGE_SHIFT; |
| 397 | } else { |
| 398 | metaphysical = 0; |
| 399 | table_gfn = walker->table_gfn[level - 2]; |
| 400 | } |
| 401 | shadow_page = kvm_mmu_get_page(vcpu, table_gfn, addr, level-1, |
Avi Kivity | d28c6cfb | 2007-03-23 09:55:25 +0200 | [diff] [blame] | 402 | metaphysical, hugepage_access, |
| 403 | shadow_ent); |
Avi Kivity | 47ad8e6 | 2007-05-06 15:50:58 +0300 | [diff] [blame] | 404 | shadow_addr = __pa(shadow_page->spt); |
Avi Kivity | aef3d3f | 2007-01-05 16:36:41 -0800 | [diff] [blame] | 405 | shadow_pte = shadow_addr | PT_PRESENT_MASK | PT_ACCESSED_MASK |
| 406 | | PT_WRITABLE_MASK | PT_USER_MASK; |
Avi Kivity | 8c7bb72 | 2006-12-13 00:34:02 -0800 | [diff] [blame] | 407 | *shadow_ent = shadow_pte; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 408 | prev_shadow_ent = shadow_ent; |
| 409 | } |
Avi Kivity | ef0197e | 2007-05-30 14:21:51 +0300 | [diff] [blame] | 410 | |
| 411 | if (walker->level == PT_DIRECTORY_LEVEL) { |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 412 | FNAME(set_pde)(vcpu, walker->pte, shadow_ent, |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 413 | walker->inherited_ar, user_fault, write_fault, |
| 414 | ptwrite, walker, walker->gfn); |
Avi Kivity | ef0197e | 2007-05-30 14:21:51 +0300 | [diff] [blame] | 415 | } else { |
| 416 | ASSERT(walker->level == PT_PAGE_TABLE_LEVEL); |
Shaohua Li | fe55188 | 2007-07-23 14:51:39 +0800 | [diff] [blame] | 417 | FNAME(set_pte)(vcpu, walker->pte, shadow_ent, |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 418 | walker->inherited_ar, user_fault, write_fault, |
| 419 | ptwrite, walker, walker->gfn); |
Avi Kivity | ef0197e | 2007-05-30 14:21:51 +0300 | [diff] [blame] | 420 | } |
| 421 | return shadow_ent; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 425 | * Page fault handler. There are several causes for a page fault: |
| 426 | * - there is no shadow pte for the guest pte |
| 427 | * - write access through a shadow pte marked read only so that we can set |
| 428 | * the dirty bit |
| 429 | * - write access to a shadow pte marked read only so we can update the page |
| 430 | * dirty bitmap, when userspace requests it |
| 431 | * - mmio access; in this case we will never install a present shadow pte |
| 432 | * - normal guest page fault due to the guest pte marked not present, not |
| 433 | * writable, or not executable |
| 434 | * |
Avi Kivity | e2dec93 | 2007-01-05 16:36:54 -0800 | [diff] [blame] | 435 | * Returns: 1 if we need to emulate the instruction, 0 otherwise, or |
| 436 | * a negative value on error. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 437 | */ |
| 438 | static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, |
| 439 | u32 error_code) |
| 440 | { |
| 441 | int write_fault = error_code & PFERR_WRITE_MASK; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 442 | int user_fault = error_code & PFERR_USER_MASK; |
Avi Kivity | 73b1087 | 2007-01-26 00:56:41 -0800 | [diff] [blame] | 443 | int fetch_fault = error_code & PFERR_FETCH_MASK; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 444 | struct guest_walker walker; |
| 445 | u64 *shadow_pte; |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 446 | int write_pt = 0; |
Avi Kivity | e2dec93 | 2007-01-05 16:36:54 -0800 | [diff] [blame] | 447 | int r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 448 | |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 449 | pgprintk("%s: addr %lx err %x\n", __FUNCTION__, addr, error_code); |
Avi Kivity | 37a7d8b | 2007-01-05 16:36:56 -0800 | [diff] [blame] | 450 | kvm_mmu_audit(vcpu, "pre page fault"); |
Avi Kivity | 714b93d | 2007-01-05 16:36:53 -0800 | [diff] [blame] | 451 | |
Avi Kivity | e2dec93 | 2007-01-05 16:36:54 -0800 | [diff] [blame] | 452 | r = mmu_topup_memory_caches(vcpu); |
| 453 | if (r) |
| 454 | return r; |
Avi Kivity | 714b93d | 2007-01-05 16:36:53 -0800 | [diff] [blame] | 455 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 456 | /* |
| 457 | * Look up the shadow pte for the faulting address. |
| 458 | */ |
Avi Kivity | 73b1087 | 2007-01-26 00:56:41 -0800 | [diff] [blame] | 459 | r = FNAME(walk_addr)(&walker, vcpu, addr, write_fault, user_fault, |
| 460 | fetch_fault); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 461 | |
| 462 | /* |
| 463 | * The page is not mapped by the guest. Let the guest handle it. |
| 464 | */ |
Avi Kivity | 7993ba4 | 2007-01-26 00:56:41 -0800 | [diff] [blame] | 465 | if (!r) { |
| 466 | pgprintk("%s: guest page fault\n", __FUNCTION__); |
| 467 | inject_page_fault(vcpu, addr, walker.error_code); |
Avi Kivity | a25f7e1 | 2007-04-30 17:05:38 +0300 | [diff] [blame] | 468 | vcpu->last_pt_write_count = 0; /* reset fork detector */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 469 | return 0; |
| 470 | } |
| 471 | |
Avi Kivity | 97a0a01 | 2007-05-31 15:08:29 +0300 | [diff] [blame] | 472 | shadow_pte = FNAME(fetch)(vcpu, addr, &walker, user_fault, write_fault, |
| 473 | &write_pt); |
| 474 | pgprintk("%s: shadow pte %p %llx ptwrite %d\n", __FUNCTION__, |
| 475 | shadow_pte, *shadow_pte, write_pt); |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 476 | |
Avi Kivity | a25f7e1 | 2007-04-30 17:05:38 +0300 | [diff] [blame] | 477 | if (!write_pt) |
| 478 | vcpu->last_pt_write_count = 0; /* reset fork detector */ |
| 479 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 480 | /* |
| 481 | * mmio: emulate if accessible, otherwise its a guest fault. |
| 482 | */ |
Avi Kivity | d27d4ac | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 483 | if (is_io_pte(*shadow_pte)) |
Avi Kivity | 7993ba4 | 2007-01-26 00:56:41 -0800 | [diff] [blame] | 484 | return 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 485 | |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 486 | ++vcpu->stat.pf_fixed; |
Avi Kivity | 37a7d8b | 2007-01-05 16:36:56 -0800 | [diff] [blame] | 487 | kvm_mmu_audit(vcpu, "post page fault (fixed)"); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 488 | |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 489 | return write_pt; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 490 | } |
| 491 | |
| 492 | static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr) |
| 493 | { |
| 494 | struct guest_walker walker; |
Avi Kivity | e119d11 | 2007-02-12 00:54:36 -0800 | [diff] [blame] | 495 | gpa_t gpa = UNMAPPED_GVA; |
| 496 | int r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 497 | |
Avi Kivity | e119d11 | 2007-02-12 00:54:36 -0800 | [diff] [blame] | 498 | r = FNAME(walk_addr)(&walker, vcpu, vaddr, 0, 0, 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 499 | |
Avi Kivity | e119d11 | 2007-02-12 00:54:36 -0800 | [diff] [blame] | 500 | if (r) { |
| 501 | gpa = (gpa_t)walker.gfn << PAGE_SHIFT; |
| 502 | gpa |= vaddr & ~PAGE_MASK; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 503 | } |
| 504 | |
| 505 | return gpa; |
| 506 | } |
| 507 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame^] | 508 | static void FNAME(prefetch_page)(struct kvm_vcpu *vcpu, |
| 509 | struct kvm_mmu_page *sp) |
| 510 | { |
| 511 | int i; |
| 512 | pt_element_t *gpt; |
| 513 | |
| 514 | if (sp->role.metaphysical || PTTYPE == 32) { |
| 515 | nonpaging_prefetch_page(vcpu, sp); |
| 516 | return; |
| 517 | } |
| 518 | |
| 519 | gpt = kmap_atomic(gfn_to_page(vcpu->kvm, sp->gfn), KM_USER0); |
| 520 | for (i = 0; i < PT64_ENT_PER_PAGE; ++i) |
| 521 | if (is_present_pte(gpt[i])) |
| 522 | sp->spt[i] = shadow_trap_nonpresent_pte; |
| 523 | else |
| 524 | sp->spt[i] = shadow_notrap_nonpresent_pte; |
| 525 | kunmap_atomic(gpt, KM_USER0); |
| 526 | } |
| 527 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 528 | #undef pt_element_t |
| 529 | #undef guest_walker |
| 530 | #undef FNAME |
| 531 | #undef PT_BASE_ADDR_MASK |
| 532 | #undef PT_INDEX |
| 533 | #undef SHADOW_PT_INDEX |
| 534 | #undef PT_LEVEL_MASK |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 535 | #undef PT_DIR_BASE_ADDR_MASK |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame^] | 536 | #undef PT_LEVEL_BITS |
Avi Kivity | cea0f0e | 2007-01-05 16:36:43 -0800 | [diff] [blame] | 537 | #undef PT_MAX_FULL_LEVELS |