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| 1 | +[DOCUMENT] |
| 2 | +MID: c2d4542d5f1741c88dfcb4f68ad7dcbd |
| 3 | +TITLE: Character Drivers and Misc |
| 4 | +UID: DOC-SUBSYS-CHARMISC |
| 5 | +OPTIONS: |
| 6 | + ENABLE_MID: True |
| 7 | + RELATION_FIELD: MID |
| 8 | + MARKUP: Text |
| 9 | + |
| 10 | +[GRAMMAR] |
| 11 | +IMPORT_FROM_FILE: grammar.sgra |
| 12 | + |
| 13 | +[[SECTION]] |
| 14 | +TITLE: Low-Level Requirements |
| 15 | + |
| 16 | +[[SECTION]] |
| 17 | +TITLE: devmem |
| 18 | + |
| 19 | +[[SECTION]] |
| 20 | +TITLE: Requirements |
| 21 | + |
| 22 | +[REQUIREMENT] |
| 23 | +MID: drivers/char/mem.c:read_mem |
| 24 | +SPDX-Req-Sys: Character Drivers and Misc |
| 25 | +TITLE: read_mem |
| 26 | + |
| 27 | +[REQUIREMENT] |
| 28 | +MID: drivers/char/mem.c:write_mem |
| 29 | +SPDX-Req-Sys: Character Drivers and Misc |
| 30 | +TITLE: write_mem |
| 31 | + |
| 32 | +[REQUIREMENT] |
| 33 | +MID: drivers/char/mem.c:mmap_mem |
| 34 | +SPDX-Req-Sys: Character Drivers and Misc |
| 35 | +TITLE: mmap_mem |
| 36 | + |
| 37 | +[REQUIREMENT] |
| 38 | +MID: drivers/char/mem.c:memory_lseek |
| 39 | +SPDX-Req-Sys: Character Drivers and Misc |
| 40 | +TITLE: memory_lseek |
| 41 | +COMMENT: >>> |
| 42 | +The memory devices use the full 32/64 bits of the offset, and so we cannot |
| 43 | +check against negative addresses: they are ok. The return value is weird, |
| 44 | +though, in that case (0). |
| 45 | +<<< |
| 46 | +COMMENT: >>> |
| 47 | +Also note that seeking relative to the "end of file" isn't supported: |
| 48 | +it has no meaning, so passing orig equal to SEEK_END returns -EINVAL. |
| 49 | +<<< |
| 50 | + |
| 51 | +[REQUIREMENT] |
| 52 | +MID: drivers/char/mem.c:open_port |
| 53 | +SPDX-Req-Sys: Character Drivers and Misc |
| 54 | +TITLE: open_port |
| 55 | + |
| 56 | +[REQUIREMENT] |
| 57 | +MID: drivers/char/mem.c:memory_open |
| 58 | +SPDX-Req-Sys: Character Drivers and Misc |
| 59 | +TITLE: memory_open |
| 60 | + |
| 61 | +[[/SECTION]] |
| 62 | + |
| 63 | +[[SECTION]] |
| 64 | +TITLE: Tests |
| 65 | + |
| 66 | +[TEST] |
| 67 | +MID: selftests/devmem:access |
| 68 | +TITLE: memory_open FE_1, FE_2, FE_4 |
| 69 | +DESCRIPTION: Test whether /dev/mem is accessible |
| 70 | +RELATIONS: |
| 71 | +- TYPE: Parent |
| 72 | + VALUE: drivers/char/mem.c:memory_open |
| 73 | + ROLE: Test |
| 74 | +- TYPE: File |
| 75 | + ROLE: Test |
| 76 | + VALUE: tools/testing/selftests/devmem/tests.c |
| 77 | + FUNCTION: test_devmem_access |
| 78 | +- TYPE: File |
| 79 | + ROLE: Test |
| 80 | + VALUE: tools/testing/selftests/devmem/devmem.c |
| 81 | + LINE_RANGE: 27, 32 |
| 82 | + |
| 83 | +[TEST] |
| 84 | +MID: selftests/devmem:open_devnum |
| 85 | +TITLE: memory_open FE_3 |
| 86 | +DESCRIPTION: Test open /dev/mem provides the correct min, maj |
| 87 | +RELATIONS: |
| 88 | +- TYPE: Parent |
| 89 | + VALUE: drivers/char/mem.c:memory_open |
| 90 | + ROLE: Test |
| 91 | +- TYPE: File |
| 92 | + ROLE: Test |
| 93 | + VALUE: tools/testing/selftests/devmem/tests.c |
| 94 | + FUNCTION: test_open_devnum |
| 95 | +- TYPE: File |
| 96 | + ROLE: Test |
| 97 | + VALUE: tools/testing/selftests/devmem/devmem.c |
| 98 | + LINE_RANGE: 33, 36 |
| 99 | + |
| 100 | +[TEST] |
| 101 | +MID: selftests/devmem:strict_devmem |
| 102 | +TITLE: test_strict_devmem |
| 103 | +DESCRIPTION: Test Strict Devmem enabled - Dependency |
| 104 | +RELATIONS: |
| 105 | +- TYPE: File |
| 106 | + ROLE: Test |
| 107 | + VALUE: tools/testing/selftests/devmem/tests.c |
| 108 | + FUNCTION: test_strict_devmem |
| 109 | +- TYPE: File |
| 110 | + ROLE: Test |
| 111 | + VALUE: tools/testing/selftests/devmem/devmem.c |
| 112 | + LINE_RANGE: 37, 42 |
| 113 | + |
| 114 | +[TEST] |
| 115 | +MID: selftests/devmem:read_at_addr_32bit_ge |
| 116 | +TITLE: read_mem FE_1 |
| 117 | +DESCRIPTION: Test read 64bit ppos vs 32 bit addr |
| 118 | +RELATIONS: |
| 119 | +- TYPE: Parent |
| 120 | + VALUE: drivers/char/mem.c:read_mem |
| 121 | + ROLE: Test |
| 122 | +- TYPE: File |
| 123 | + ROLE: Test |
| 124 | + VALUE: tools/testing/selftests/devmem/tests.c |
| 125 | + FUNCTION: test_read_at_addr_32bit_ge |
| 126 | +- TYPE: File |
| 127 | + ROLE: Test |
| 128 | + VALUE: tools/testing/selftests/devmem/devmem.c |
| 129 | + LINE_RANGE: 43, 48 |
| 130 | + |
| 131 | +[TEST] |
| 132 | +MID: selftests/devmem:read_outside_linear_map |
| 133 | +TITLE: read_mem FE_2 |
| 134 | +DESCRIPTION: Test read outside linear map |
| 135 | +RELATIONS: |
| 136 | +- TYPE: Parent |
| 137 | + VALUE: drivers/char/mem.c:read_mem |
| 138 | + ROLE: Test |
| 139 | +- TYPE: File |
| 140 | + ROLE: Test |
| 141 | + VALUE: tools/testing/selftests/devmem/tests.c |
| 142 | + FUNCTION: test_read_outside_linear_map |
| 143 | +- TYPE: File |
| 144 | + ROLE: Test |
| 145 | + VALUE: tools/testing/selftests/devmem/devmem.c |
| 146 | + LINE_RANGE: 49, 54 |
| 147 | + |
| 148 | +[TEST] |
| 149 | +MID: selftests/devmem:read_secret_area |
| 150 | +TITLE: read_mem FE_??? |
| 151 | +DESCRIPTION: Test read memfd_secret area can not being accessed |
| 152 | +RELATIONS: |
| 153 | +- TYPE: Parent |
| 154 | + VALUE: drivers/char/mem.c:read_mem |
| 155 | +- TYPE: File |
| 156 | + ROLE: Test |
| 157 | + VALUE: tools/testing/selftests/devmem/tests.c |
| 158 | + FUNCTION: test_read_secret_area |
| 159 | +- TYPE: File |
| 160 | + ROLE: Test |
| 161 | + VALUE: tools/testing/selftests/devmem/devmem.c |
| 162 | + LINE_RANGE: 55, 60 |
| 163 | + |
| 164 | +[TEST] |
| 165 | +MID: selftests/devmem:read_allowed_area |
| 166 | +TITLE: read_mem FE_3.2 |
| 167 | +DESCRIPTION: test read allowed area |
| 168 | +RELATIONS: |
| 169 | +- TYPE: Parent |
| 170 | + VALUE: drivers/char/mem.c:read_mem |
| 171 | + ROLE: Test |
| 172 | +- TYPE: File |
| 173 | + ROLE: Test |
| 174 | + VALUE: tools/testing/selftests/devmem/tests.c |
| 175 | + FUNCTION: test_read_allowed_area |
| 176 | +- TYPE: File |
| 177 | + ROLE: Test |
| 178 | + VALUE: tools/testing/selftests/devmem/devmem.c |
| 179 | + LINE_RANGE: 61, 66 |
| 180 | + |
| 181 | +[TEST] |
| 182 | +MID: selftests/devmem:read_allowed_area_ppos_advance |
| 183 | +TITLE: read_mem FE_4 |
| 184 | +DESCRIPTION: test read allowed area increments ppos |
| 185 | +RELATIONS: |
| 186 | +- TYPE: Parent |
| 187 | + VALUE: drivers/char/mem.c:read_mem |
| 188 | + ROLE: Test |
| 189 | +- TYPE: File |
| 190 | + ROLE: Test |
| 191 | + VALUE: tools/testing/selftests/devmem/tests.c |
| 192 | + FUNCTION: test_read_allowed_area_ppos_advance |
| 193 | +- TYPE: File |
| 194 | + ROLE: Test |
| 195 | + VALUE: tools/testing/selftests/devmem/devmem.c |
| 196 | + LINE_RANGE: 67, 72 |
| 197 | + |
| 198 | +[TEST] |
| 199 | +MID: selftests/devmem:read_restricted_area |
| 200 | +TITLE: read_mem FE_3.3, FE_3.3.1, FE_3.2.2 |
| 201 | +DESCRIPTION: test read restricted returns zeros |
| 202 | +RELATIONS: |
| 203 | +- TYPE: Parent |
| 204 | + VALUE: drivers/char/mem.c:read_mem |
| 205 | + ROLE: Test |
| 206 | +- TYPE: File |
| 207 | + ROLE: Test |
| 208 | + VALUE: tools/testing/selftests/devmem/tests.c |
| 209 | + FUNCTION: test_read_restricted_area |
| 210 | +- TYPE: File |
| 211 | + ROLE: Test |
| 212 | + VALUE: tools/testing/selftests/devmem/devmem.c |
| 213 | + LINE_RANGE: 73, 78 |
| 214 | + |
| 215 | +[TEST] |
| 216 | +MID: selftests/devmem:write_outside_area |
| 217 | +TITLE: write_mem - FE_2 |
| 218 | +DESCRIPTION: test write outside |
| 219 | +RELATIONS: |
| 220 | +- TYPE: Parent |
| 221 | + VALUE: drivers/char/mem.c:write_mem |
| 222 | + ROLE: Test |
| 223 | +- TYPE: File |
| 224 | + ROLE: Test |
| 225 | + VALUE: tools/testing/selftests/devmem/tests.c |
| 226 | + FUNCTION: test_write_outside_area |
| 227 | +- TYPE: File |
| 228 | + ROLE: Test |
| 229 | + VALUE: tools/testing/selftests/devmem/devmem.c |
| 230 | + LINE_RANGE: 79, 84 |
| 231 | + |
| 232 | +[TEST] |
| 233 | +MID: selftests/devmem:seek_seek_set |
| 234 | +TITLE: memory_lseek FE_2, FE_2.2 |
| 235 | +DESCRIPTION: test seek funcction SEEK_SET |
| 236 | +RELATIONS: |
| 237 | +- TYPE: Parent |
| 238 | + VALUE: drivers/char/mem.c:memory_lseek |
| 239 | + ROLE: Test |
| 240 | +- TYPE: File |
| 241 | + ROLE: Test |
| 242 | + VALUE: tools/testing/selftests/devmem/tests.c |
| 243 | + FUNCTION: test_seek_seek_set |
| 244 | +- TYPE: File |
| 245 | + ROLE: Test |
| 246 | + VALUE: tools/testing/selftests/devmem/devmem.c |
| 247 | + LINE_RANGE: 85, 90 |
| 248 | + |
| 249 | +[TEST] |
| 250 | +MID: selftests/devmem:seek_seek_cur |
| 251 | +TITLE: memory_lseek FE_2, FE_2.1 |
| 252 | +DESCRIPTION: test seek function SEEK_CUR |
| 253 | +RELATIONS: |
| 254 | +- TYPE: Parent |
| 255 | + VALUE: drivers/char/mem.c:memory_lseek |
| 256 | + ROLE: Test |
| 257 | +- TYPE: File |
| 258 | + ROLE: Test |
| 259 | + VALUE: tools/testing/selftests/devmem/tests.c |
| 260 | + FUNCTION: test_seek_seek_cur |
| 261 | +- TYPE: File |
| 262 | + ROLE: Test |
| 263 | + VALUE: tools/testing/selftests/devmem/devmem.c |
| 264 | + LINE_RANGE: 91, 96 |
| 265 | + |
| 266 | +[TEST] |
| 267 | +MID: selftests/devmem:seek_seek_other |
| 268 | +TITLE: memory_lseek FE_2, FE2.3 |
| 269 | +DESCRIPTION: test seek function SEEK_END other |
| 270 | +RELATIONS: |
| 271 | +- TYPE: Parent |
| 272 | + VALUE: drivers/char/mem.c:memory_lseek |
| 273 | + ROLE: Test |
| 274 | +- TYPE: File |
| 275 | + ROLE: Test |
| 276 | + VALUE: tools/testing/selftests/devmem/tests.c |
| 277 | + FUNCTION: test_seek_seek_other |
| 278 | +- TYPE: File |
| 279 | + ROLE: Test |
| 280 | + VALUE: tools/testing/selftests/devmem/devmem.c |
| 281 | + LINE_RANGE: 97, 102 |
| 282 | + |
| 283 | +[[/SECTION]] |
| 284 | + |
| 285 | +[[/SECTION]] |
| 286 | + |
| 287 | +[[/SECTION]] |
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