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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 | // SPDX-License-Identifier: GPL-2.0-only /* * * Authors: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> * Authors: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> */ #include <stdio.h> #include <sys/mman.h> #include <string.h> #include "../kselftest.h" #ifdef __powerpc64__ #define PAGE_SIZE (64 << 10) /* * This will work with 16M and 2M hugepage size */ #define HUGETLB_SIZE (16 << 20) #elif __aarch64__ /* * The default hugepage size for 64k base pagesize * is 512MB. */ #define PAGE_SIZE (64 << 10) #define HUGETLB_SIZE (512 << 20) #else #define PAGE_SIZE (4 << 10) #define HUGETLB_SIZE (2 << 20) #endif /* * The hint addr value is used to allocate addresses * beyond the high address switch boundary. */ #define ADDR_MARK_128TB (1UL << 47) #define ADDR_MARK_256TB (1UL << 48) #define HIGH_ADDR_128TB ((void *) (1UL << 48)) #define HIGH_ADDR_256TB ((void *) (1UL << 49)) #define LOW_ADDR ((void *) (1UL << 30)) #ifdef __aarch64__ #define ADDR_SWITCH_HINT ADDR_MARK_256TB #define HIGH_ADDR HIGH_ADDR_256TB #else #define ADDR_SWITCH_HINT ADDR_MARK_128TB #define HIGH_ADDR HIGH_ADDR_128TB #endif struct testcase { void *addr; unsigned long size; unsigned long flags; const char *msg; unsigned int low_addr_required:1; unsigned int keep_mapped:1; }; static struct testcase testcases[] = { { /* * If stack is moved, we could possibly allocate * this at the requested address. */ .addr = ((void *)(ADDR_SWITCH_HINT - PAGE_SIZE)), .size = PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(ADDR_SWITCH_HINT - PAGE_SIZE, PAGE_SIZE)", .low_addr_required = 1, }, { /* * Unless MAP_FIXED is specified, allocation based on hint * addr is never at requested address or above it, which is * beyond high address switch boundary in this case. Instead, * a suitable allocation is found in lower address space. */ .addr = ((void *)(ADDR_SWITCH_HINT - PAGE_SIZE)), .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(ADDR_SWITCH_HINT - PAGE_SIZE, (2 * PAGE_SIZE))", .low_addr_required = 1, }, { /* * Exact mapping at high address switch boundary, should * be obtained even without MAP_FIXED as area is free. */ .addr = ((void *)(ADDR_SWITCH_HINT)), .size = PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(ADDR_SWITCH_HINT, PAGE_SIZE)", .keep_mapped = 1, }, { .addr = (void *)(ADDR_SWITCH_HINT), .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, .msg = "mmap(ADDR_SWITCH_HINT, 2 * PAGE_SIZE, MAP_FIXED)", }, { .addr = NULL, .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(NULL)", .low_addr_required = 1, }, { .addr = LOW_ADDR, .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(LOW_ADDR)", .low_addr_required = 1, }, { .addr = HIGH_ADDR, .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(HIGH_ADDR)", .keep_mapped = 1, }, { .addr = HIGH_ADDR, .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(HIGH_ADDR) again", .keep_mapped = 1, }, { .addr = HIGH_ADDR, .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, .msg = "mmap(HIGH_ADDR, MAP_FIXED)", }, { .addr = (void *) -1, .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(-1)", .keep_mapped = 1, }, { .addr = (void *) -1, .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(-1) again", }, { .addr = ((void *)(ADDR_SWITCH_HINT - PAGE_SIZE)), .size = PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(ADDR_SWITCH_HINT - PAGE_SIZE, PAGE_SIZE)", .low_addr_required = 1, }, { .addr = (void *)(ADDR_SWITCH_HINT - PAGE_SIZE), .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(ADDR_SWITCH_HINT - PAGE_SIZE, 2 * PAGE_SIZE)", .low_addr_required = 1, .keep_mapped = 1, }, { .addr = (void *)(ADDR_SWITCH_HINT - PAGE_SIZE / 2), .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(ADDR_SWITCH_HINT - PAGE_SIZE/2 , 2 * PAGE_SIZE)", .low_addr_required = 1, .keep_mapped = 1, }, { .addr = ((void *)(ADDR_SWITCH_HINT)), .size = PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(ADDR_SWITCH_HINT, PAGE_SIZE)", }, { .addr = (void *)(ADDR_SWITCH_HINT), .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, .msg = "mmap(ADDR_SWITCH_HINT, 2 * PAGE_SIZE, MAP_FIXED)", }, }; static struct testcase hugetlb_testcases[] = { { .addr = NULL, .size = HUGETLB_SIZE, .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(NULL, MAP_HUGETLB)", .low_addr_required = 1, }, { .addr = LOW_ADDR, .size = HUGETLB_SIZE, .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(LOW_ADDR, MAP_HUGETLB)", .low_addr_required = 1, }, { .addr = HIGH_ADDR, .size = HUGETLB_SIZE, .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(HIGH_ADDR, MAP_HUGETLB)", .keep_mapped = 1, }, { .addr = HIGH_ADDR, .size = HUGETLB_SIZE, .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(HIGH_ADDR, MAP_HUGETLB) again", .keep_mapped = 1, }, { .addr = HIGH_ADDR, .size = HUGETLB_SIZE, .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, .msg = "mmap(HIGH_ADDR, MAP_FIXED | MAP_HUGETLB)", }, { .addr = (void *) -1, .size = HUGETLB_SIZE, .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(-1, MAP_HUGETLB)", .keep_mapped = 1, }, { .addr = (void *) -1, .size = HUGETLB_SIZE, .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(-1, MAP_HUGETLB) again", }, { .addr = (void *)(ADDR_SWITCH_HINT - PAGE_SIZE), .size = 2 * HUGETLB_SIZE, .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(ADDR_SWITCH_HINT - PAGE_SIZE, 2*HUGETLB_SIZE, MAP_HUGETLB)", .low_addr_required = 1, .keep_mapped = 1, }, { .addr = (void *)(ADDR_SWITCH_HINT), .size = 2 * HUGETLB_SIZE, .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, .msg = "mmap(ADDR_SWITCH_HINT , 2*HUGETLB_SIZE, MAP_FIXED | MAP_HUGETLB)", }, }; static int run_test(struct testcase *test, int count) { void *p; int i, ret = KSFT_PASS; for (i = 0; i < count; i++) { struct testcase *t = test + i; p = mmap(t->addr, t->size, PROT_READ | PROT_WRITE, t->flags, -1, 0); printf("%s: %p - ", t->msg, p); if (p == MAP_FAILED) { printf("FAILED\n"); ret = KSFT_FAIL; continue; } if (t->low_addr_required && p >= (void *)(ADDR_SWITCH_HINT)) { printf("FAILED\n"); ret = KSFT_FAIL; } else { /* * Do a dereference of the address returned so that we catch * bugs in page fault handling */ memset(p, 0, t->size); printf("OK\n"); } if (!t->keep_mapped) munmap(p, t->size); } return ret; } static int supported_arch(void) { #if defined(__powerpc64__) return 1; #elif defined(__x86_64__) return 1; #elif defined(__aarch64__) return getpagesize() == PAGE_SIZE; #else return 0; #endif } int main(int argc, char **argv) { int ret; if (!supported_arch()) return KSFT_SKIP; ret = run_test(testcases, ARRAY_SIZE(testcases)); if (argc == 2 && !strcmp(argv[1], "--run-hugetlb")) ret = run_test(hugetlb_testcases, ARRAY_SIZE(hugetlb_testcases)); return ret; } |