1Arm CPU Specific Build Macros 2============================= 3 4This document describes the various build options present in the CPU specific 5operations framework to enable errata workarounds and to enable optimizations 6for a specific CPU on a platform. 7 8Security Vulnerability Workarounds 9---------------------------------- 10 11TF-A exports a series of build flags which control which security 12vulnerability workarounds should be applied at runtime. 13 14- ``WORKAROUND_CVE_2017_5715``: Enables the security workaround for 15 `CVE-2017-5715`_. This flag can be set to 0 by the platform if none 16 of the PEs in the system need the workaround. Setting this flag to 0 provides 17 no performance benefit for non-affected platforms, it just helps to comply 18 with the recommendation in the spec regarding workaround discovery. 19 Defaults to 1. 20 21- ``WORKAROUND_CVE_2018_3639``: Enables the security workaround for 22 `CVE-2018-3639`_. Defaults to 1. The TF-A project recommends to keep 23 the default value of 1 even on platforms that are unaffected by 24 CVE-2018-3639, in order to comply with the recommendation in the spec 25 regarding workaround discovery. 26 27- ``DYNAMIC_WORKAROUND_CVE_2018_3639``: Enables dynamic mitigation for 28 `CVE-2018-3639`_. This build option should be set to 1 if the target 29 platform contains at least 1 CPU that requires dynamic mitigation. 30 Defaults to 0. 31 32- ``WORKAROUND_CVE_2022_23960``: Enables mitigation for `CVE-2022-23960`_. 33 This build option should be set to 1 if the target platform contains at 34 least 1 CPU that requires this mitigation. Defaults to 1. 35 36- ``WORKAROUND_CVE_2024_5660``: Enables mitigation for `CVE-2024-5660`. 37 The fix is to disable hardware page aggregation by setting CPUECTLR_EL1[46] 38 in EL3 FW. This build option should be set to 1 if the target platform contains 39 at least 1 CPU that requires this mitigation. Defaults to 1. 40 41- ``WORKAROUND_CVE_2024_7881``: Enables mitigation for `CVE-2024-7881`. 42 This build option should be set to 1 if the target platform contains at 43 least 1 CPU that requires this mitigation. Defaults to 1. 44 45.. _arm_cpu_macros_errata_workarounds: 46 47CPU Errata Workarounds 48---------------------- 49 50TF-A exports a series of build flags which control the errata workarounds that 51are applied to each CPU by the reset handler. The errata details can be found 52in the CPU specific errata documents published by Arm: 53 54- `Cortex-A53 MPCore Software Developers Errata Notice`_ 55- `Cortex-A57 MPCore Software Developers Errata Notice`_ 56- `Cortex-A72 MPCore Software Developers Errata Notice`_ 57 58The errata workarounds are implemented for a particular revision or a set of 59processor revisions. This is checked by the reset handler at runtime. Each 60errata workaround is identified by its ``ID`` as specified in the processor's 61errata notice document. The format of the define used to enable/disable the 62errata workaround is ``ERRATA_<Processor name>_<ID>``, where the ``Processor name`` 63is for example ``A57`` for the ``Cortex_A57`` CPU. 64 65Refer to :ref:`firmware_design_cpu_errata_implementation` for information on how to 66write errata workaround functions. 67 68All workarounds are disabled by default. The platform is responsible for 69enabling these workarounds according to its requirement by defining the 70errata workaround build flags in the platform specific makefile. In case 71these workarounds are enabled for the wrong CPU revision then the errata 72workaround is not applied. In the DEBUG build, this is indicated by 73printing a warning to the crash console. 74 75In the current implementation, a platform which has more than 1 variant 76with different revisions of a processor has no runtime mechanism available 77for it to specify which errata workarounds should be enabled or not. 78 79The value of the build flags is 0 by default, that is, disabled. A value of 1 80will enable it. 81 82For Cortex-A9, the following errata build flags are defined : 83 84- ``ERRATA_A9_794073``: This applies errata 794073 workaround to Cortex-A9 85 CPU. This needs to be enabled for all revisions of the CPU. 86 87For Cortex-A15, the following errata build flags are defined : 88 89- ``ERRATA_A15_816470``: This applies errata 816470 workaround to Cortex-A15 90 CPU. This needs to be enabled only for revision >= r3p0 of the CPU. 91 92- ``ERRATA_A15_827671``: This applies errata 827671 workaround to Cortex-A15 93 CPU. This needs to be enabled only for revision >= r3p0 of the CPU. 94 95For Cortex-A17, the following errata build flags are defined : 96 97- ``ERRATA_A17_852421``: This applies errata 852421 workaround to Cortex-A17 98 CPU. This needs to be enabled only for revision <= r1p2 of the CPU. 99 100- ``ERRATA_A17_852423``: This applies errata 852423 workaround to Cortex-A17 101 CPU. This needs to be enabled only for revision <= r1p2 of the CPU. 102 103For Cortex-A35, the following errata build flags are defined : 104 105- ``ERRATA_A35_855472``: This applies errata 855472 workaround to Cortex-A35 106 CPUs. This needs to be enabled only for revision r0p0 of Cortex-A35. 107 108For Cortex-A53, the following errata build flags are defined : 109 110- ``ERRATA_A53_819472``: This applies errata 819472 workaround to all 111 CPUs. This needs to be enabled only for revision <= r0p1 of Cortex-A53. 112 113- ``ERRATA_A53_824069``: This applies errata 824069 workaround to all 114 CPUs. This needs to be enabled only for revision <= r0p2 of Cortex-A53. 115 116- ``ERRATA_A53_826319``: This applies errata 826319 workaround to Cortex-A53 117 CPU. This needs to be enabled only for revision <= r0p2 of the CPU. 118 119- ``ERRATA_A53_827319``: This applies errata 827319 workaround to all 120 CPUs. This needs to be enabled only for revision <= r0p2 of Cortex-A53. 121 122- ``ERRATA_A53_835769``: This applies erratum 835769 workaround at compile and 123 link time to Cortex-A53 CPU. This needs to be enabled for some variants of 124 revision <= r0p4. This workaround can lead the linker to create ``*.stub`` 125 sections. 126 127- ``ERRATA_A53_836870``: This applies errata 836870 workaround to Cortex-A53 128 CPU. This needs to be enabled only for revision <= r0p3 of the CPU. From 129 r0p4 and onwards, this errata is enabled by default in hardware. Identical to 130 ``A53_DISABLE_NON_TEMPORAL_HINT``. 131 132- ``ERRATA_A53_843419``: This applies erratum 843419 workaround at link time 133 to Cortex-A53 CPU. This needs to be enabled for some variants of revision 134 <= r0p4. This workaround can lead the linker to emit ``*.stub`` sections 135 which are 4kB aligned. 136 137- ``ERRATA_A53_855873``: This applies errata 855873 workaround to Cortex-A53 138 CPUs. Though the erratum is present in every revision of the CPU, 139 this workaround is only applied to CPUs from r0p3 onwards, which feature 140 a chicken bit in CPUACTLR_EL1 to enable a hardware workaround. 141 Earlier revisions of the CPU have other errata which require the same 142 workaround in software, so they should be covered anyway. 143 144- ``ERRATA_A53_1530924``: This applies errata 1530924 workaround to all 145 revisions of Cortex-A53 CPU. 146 147For Cortex-A55, the following errata build flags are defined : 148 149- ``ERRATA_A55_768277``: This applies errata 768277 workaround to Cortex-A55 150 CPU. This needs to be enabled only for revision r0p0 of the CPU. 151 152- ``ERRATA_A55_778703``: This applies errata 778703 workaround to Cortex-A55 153 CPU. This needs to be enabled only for revision r0p0 of the CPU. 154 155- ``ERRATA_A55_798797``: This applies errata 798797 workaround to Cortex-A55 156 CPU. This needs to be enabled only for revision r0p0 of the CPU. 157 158- ``ERRATA_A55_846532``: This applies errata 846532 workaround to Cortex-A55 159 CPU. This needs to be enabled only for revision <= r0p1 of the CPU. 160 161- ``ERRATA_A55_903758``: This applies errata 903758 workaround to Cortex-A55 162 CPU. This needs to be enabled only for revision <= r0p1 of the CPU. 163 164- ``ERRATA_A55_1221012``: This applies errata 1221012 workaround to Cortex-A55 165 CPU. This needs to be enabled only for revision <= r1p0 of the CPU. 166 167- ``ERRATA_A55_1530923``: This applies errata 1530923 workaround to all 168 revisions of Cortex-A55 CPU. 169 170For Cortex-A57, the following errata build flags are defined : 171 172- ``ERRATA_A57_806969``: This applies errata 806969 workaround to Cortex-A57 173 CPU. This needs to be enabled only for revision r0p0 of the CPU. 174 175- ``ERRATA_A57_813419``: This applies errata 813419 workaround to Cortex-A57 176 CPU. This needs to be enabled only for revision r0p0 of the CPU. 177 178- ``ERRATA_A57_813420``: This applies errata 813420 workaround to Cortex-A57 179 CPU. This needs to be enabled only for revision r0p0 of the CPU. 180 181- ``ERRATA_A57_814670``: This applies errata 814670 workaround to Cortex-A57 182 CPU. This needs to be enabled only for revision r0p0 of the CPU. 183 184- ``ERRATA_A57_817169``: This applies errata 817169 workaround to Cortex-A57 185 CPU. This needs to be enabled only for revision <= r0p1 of the CPU. 186 187- ``ERRATA_A57_826974``: This applies errata 826974 workaround to Cortex-A57 188 CPU. This needs to be enabled only for revision <= r1p1 of the CPU. 189 190- ``ERRATA_A57_826977``: This applies errata 826977 workaround to Cortex-A57 191 CPU. This needs to be enabled only for revision <= r1p1 of the CPU. 192 193- ``ERRATA_A57_828024``: This applies errata 828024 workaround to Cortex-A57 194 CPU. This needs to be enabled only for revision <= r1p1 of the CPU. 195 196- ``ERRATA_A57_829520``: This applies errata 829520 workaround to Cortex-A57 197 CPU. This needs to be enabled only for revision <= r1p2 of the CPU. 198 199- ``ERRATA_A57_833471``: This applies errata 833471 workaround to Cortex-A57 200 CPU. This needs to be enabled only for revision <= r1p2 of the CPU. 201 202- ``ERRATA_A57_859972``: This applies errata 859972 workaround to Cortex-A57 203 CPU. This needs to be enabled only for revision <= r1p3 of the CPU. 204 205- ``ERRATA_A57_1319537``: This applies errata 1319537 workaround to all 206 revisions of Cortex-A57 CPU. 207 208For Cortex-A72, the following errata build flags are defined : 209 210- ``ERRATA_A72_859971``: This applies errata 859971 workaround to Cortex-A72 211 CPU. This needs to be enabled only for revision <= r0p3 of the CPU. 212 213- ``ERRATA_A72_1319367``: This applies errata 1319367 workaround to all 214 revisions of Cortex-A72 CPU. 215 216For Cortex-A73, the following errata build flags are defined : 217 218- ``ERRATA_A73_852427``: This applies errata 852427 workaround to Cortex-A73 219 CPU. This needs to be enabled only for revision r0p0 of the CPU. 220 221- ``ERRATA_A73_855423``: This applies errata 855423 workaround to Cortex-A73 222 CPU. This needs to be enabled only for revision <= r0p1 of the CPU. 223 224For Cortex-A75, the following errata build flags are defined : 225 226- ``ERRATA_A75_764081``: This applies errata 764081 workaround to Cortex-A75 227 CPU. This needs to be enabled only for revision r0p0 of the CPU. 228 229- ``ERRATA_A75_790748``: This applies errata 790748 workaround to Cortex-A75 230 CPU. This needs to be enabled only for revision r0p0 of the CPU. 231 232For Cortex-A76, the following errata build flags are defined : 233 234- ``ERRATA_A76_1073348``: This applies errata 1073348 workaround to Cortex-A76 235 CPU. This needs to be enabled only for revision <= r1p0 of the CPU. 236 237- ``ERRATA_A76_1130799``: This applies errata 1130799 workaround to Cortex-A76 238 CPU. This needs to be enabled only for revision <= r2p0 of the CPU. 239 240- ``ERRATA_A76_1220197``: This applies errata 1220197 workaround to Cortex-A76 241 CPU. This needs to be enabled only for revision <= r2p0 of the CPU. 242 243- ``ERRATA_A76_1257314``: This applies errata 1257314 workaround to Cortex-A76 244 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 245 246- ``ERRATA_A76_1262606``: This applies errata 1262606 workaround to Cortex-A76 247 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 248 249- ``ERRATA_A76_1262888``: This applies errata 1262888 workaround to Cortex-A76 250 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 251 252- ``ERRATA_A76_1275112``: This applies errata 1275112 workaround to Cortex-A76 253 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 254 255- ``ERRATA_A76_1791580``: This applies errata 1791580 workaround to Cortex-A76 256 CPU. This needs to be enabled only for revision <= r4p0 of the CPU. 257 258- ``ERRATA_A76_1165522``: This applies errata 1165522 workaround to all 259 revisions of Cortex-A76 CPU. This errata is fixed in r3p0 but due to 260 limitation of errata framework this errata is applied to all revisions 261 of Cortex-A76 CPU. 262 263- ``ERRATA_A76_1868343``: This applies errata 1868343 workaround to Cortex-A76 264 CPU. This needs to be enabled only for revision <= r4p0 of the CPU. 265 266- ``ERRATA_A76_1946160``: This applies errata 1946160 workaround to Cortex-A76 267 CPU. This needs to be enabled only for revisions r3p0 - r4p1 of the CPU. 268 269- ``ERRATA_A76_2743102``: This applies errata 2743102 workaround to Cortex-A76 270 CPU. This needs to be enabled for all revisions <= r4p1 of the CPU and is 271 still open. 272 273For Cortex-A77, the following errata build flags are defined : 274 275- ``ERRATA_A77_1508412``: This applies errata 1508412 workaround to Cortex-A77 276 CPU. This needs to be enabled only for revision <= r1p0 of the CPU. 277 278- ``ERRATA_A77_1925769``: This applies errata 1925769 workaround to Cortex-A77 279 CPU. This needs to be enabled only for revision <= r1p1 of the CPU. 280 281- ``ERRATA_A77_1946167``: This applies errata 1946167 workaround to Cortex-A77 282 CPU. This needs to be enabled only for revision <= r1p1 of the CPU. 283 284- ``ERRATA_A77_1791578``: This applies errata 1791578 workaround to Cortex-A77 285 CPU. This needs to be enabled for r0p0, r1p0, and r1p1, it is still open. 286 287- ``ERRATA_A77_2356587``: This applies errata 2356587 workaround to Cortex-A77 288 CPU. This needs to be enabled for r0p0, r1p0, and r1p1, it is still open. 289 290 - ``ERRATA_A77_1800714``: This applies errata 1800714 workaround to Cortex-A77 291 CPU. This needs to be enabled for revisions <= r1p1 of the CPU. 292 293 - ``ERRATA_A77_2743100``: This applies errata 2743100 workaround to Cortex-A77 294 CPU. This needs to be enabled for r0p0, r1p0, and r1p1, it is still open. 295 296For Cortex-A78, the following errata build flags are defined : 297 298- ``ERRATA_A78_1688305``: This applies errata 1688305 workaround to Cortex-A78 299 CPU. This needs to be enabled only for revision r0p0 - r1p0 of the CPU. 300 301- ``ERRATA_A78_1941498``: This applies errata 1941498 workaround to Cortex-A78 302 CPU. This needs to be enabled for revisions r0p0, r1p0, and r1p1 of the CPU. 303 304- ``ERRATA_A78_1951500``: This applies errata 1951500 workaround to Cortex-A78 305 CPU. This needs to be enabled for revisions r1p0 and r1p1, r0p0 has the same 306 issue but there is no workaround for that revision. 307 308- ``ERRATA_A78_1821534``: This applies errata 1821534 workaround to Cortex-A78 309 CPU. This needs to be enabled for revisions r0p0 and r1p0. 310 311- ``ERRATA_A78_1952683``: This applies errata 1952683 workaround to Cortex-A78 312 CPU. This needs to be enabled for revision r0p0, it is fixed in r1p0. 313 314- ``ERRATA_A78_2242635``: This applies errata 2242635 workaround to Cortex-A78 315 CPU. This needs to be enabled for revisions r1p0, r1p1, and r1p2. The issue 316 is present in r0p0 but there is no workaround. It is still open. 317 318- ``ERRATA_A78_2376745``: This applies errata 2376745 workaround to Cortex-A78 319 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1, and r1p2, and 320 it is still open. 321 322- ``ERRATA_A78_2395406``: This applies errata 2395406 workaround to Cortex-A78 323 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1, and r1p2, and 324 it is still open. 325 326- ``ERRATA_A78_2712571``: This applies erratum 2712571 workaround to Cortex-A78 327 CPU, this erratum affects system configurations that do not use an ARM 328 interconnect IP. This needs to be enabled for revisions r0p0, r1p0, r1p1 329 and r1p2 and it is still open. 330 331- ``ERRATA_A78_2742426``: This applies erratum 2742426 workaround to Cortex-A78 332 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1 and r1p2 and 333 it is still open. 334 335- ``ERRATA_A78_2772019``: This applies errata 2772019 workaround to Cortex-A78 336 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1, and r1p2, and 337 it is still open. 338 339- ``ERRATA_A78_2779479``: This applies erratum 2779479 workaround to Cortex-A78 340 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1 and r1p2 and 341 it is still open. 342 343For Cortex-A78AE, the following errata build flags are defined : 344 345- ``ERRATA_A78_AE_1941500`` : This applies errata 1941500 workaround to 346 Cortex-A78AE CPU. This needs to be enabled for revisions r0p0 and r0p1. 347 This erratum is still open. 348 349- ``ERRATA_A78_AE_1951502`` : This applies errata 1951502 workaround to 350 Cortex-A78AE CPU. This needs to be enabled for revisions r0p0 and r0p1. This 351 erratum is still open. 352 353- ``ERRATA_A78_AE_2376748`` : This applies errata 2376748 workaround to 354 Cortex-A78AE CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2. 355 This erratum is still open. 356 357- ``ERRATA_A78_AE_2395408`` : This applies errata 2395408 workaround to 358 Cortex-A78AE CPU. This needs to be enabled for revisions r0p0 and r0p1. This 359 erratum is still open. 360 361- ``ERRATA_A78_AE_2712574`` : This applies erratum 2712574 workaround to 362 Cortex-A78AE CPU. This erratum affects system configurations that do not use 363 an ARM interconnect IP. This needs to be enabled for revisions r0p0, r0p1 and 364 r0p2. This erratum is still open. 365 366For Cortex-A78C, the following errata build flags are defined : 367 368- ``ERRATA_A78C_1827430`` : This applies errata 1827430 workaround to 369 Cortex-A78C CPU. This needs to be enabled for revision r0p0. The erratum is 370 fixed in r0p1. 371 372- ``ERRATA_A78C_1827440`` : This applies errata 1827440 workaround to 373 Cortex-A78C CPU. This needs to be enabled for revision r0p0. The erratum is 374 fixed in r0p1. 375 376- ``ERRATA_A78C_2242638`` : This applies errata 2242638 workaround to 377 Cortex-A78C CPU. This needs to be enabled for revisions r0p1, r0p2 and 378 it is still open. 379 380- ``ERRATA_A78C_2376749`` : This applies errata 2376749 workaround to 381 Cortex-A78C CPU. This needs to be enabled for revisions r0p1 and r0p2. This 382 erratum is still open. 383 384- ``ERRATA_A78C_2395411`` : This applies errata 2395411 workaround to 385 Cortex-A78C CPU. This needs to be enabled for revisions r0p1 and r0p2. This 386 erratum is still open. 387 388- ``ERRATA_A78C_2683027`` : This applies errata 2683027 workaround to 389 Cortex-A78C CPU. This needs to be enabled for revisions r0p1 and r0p2. This 390 erratum is still open. 391 392- ``ERRATA_A78C_2712575`` : This applies erratum 2712575 workaround to 393 Cortex-A78C CPU, this erratum affects system configurations that do not use 394 an ARM interconnect IP. This needs to be enabled for revisions r0p1 and r0p2 395 and is still open. 396 397- ``ERRATA_A78C_2743232`` : This applies erratum 2743232 workaround to 398 Cortex-A78C CPU. This needs to be enabled for revisions r0p1 and r0p2. 399 This erratum is still open. 400 401- ``ERRATA_A78C_2772121`` : This applies errata 2772121 workaround to 402 Cortex-A78C CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2. 403 This erratum is still open. 404 405- ``ERRATA_A78C_2779484`` : This applies errata 2779484 workaround to 406 Cortex-A78C CPU. This needs to be enabled for revisions r0p1 and r0p2. 407 This erratum is still open. 408 409For Cortex-X1 CPU, the following errata build flags are defined: 410 411- ``ERRATA_X1_1821534`` : This applies errata 1821534 workaround to Cortex-X1 412 CPU. This needs to be enabled only for revision <= r1p0 of the CPU. 413 414- ``ERRATA_X1_1688305`` : This applies errata 1688305 workaround to Cortex-X1 415 CPU. This needs to be enabled only for revision <= r1p0 of the CPU. 416 417- ``ERRATA_X1_1827429`` : This applies errata 1827429 workaround to Cortex-X1 418 CPU. This needs to be enabled only for revision <= r1p0 of the CPU. 419 420For Neoverse N1, the following errata build flags are defined : 421 422- ``ERRATA_N1_1073348``: This applies errata 1073348 workaround to Neoverse-N1 423 CPU. This needs to be enabled only for revision r0p0 and r1p0 of the CPU. 424 425- ``ERRATA_N1_1130799``: This applies errata 1130799 workaround to Neoverse-N1 426 CPU. This needs to be enabled only for revision <= r2p0 of the CPU. 427 428- ``ERRATA_N1_1165347``: This applies errata 1165347 workaround to Neoverse-N1 429 CPU. This needs to be enabled only for revision <= r2p0 of the CPU. 430 431- ``ERRATA_N1_1207823``: This applies errata 1207823 workaround to Neoverse-N1 432 CPU. This needs to be enabled only for revision <= r2p0 of the CPU. 433 434- ``ERRATA_N1_1220197``: This applies errata 1220197 workaround to Neoverse-N1 435 CPU. This needs to be enabled only for revision <= r2p0 of the CPU. 436 437- ``ERRATA_N1_1257314``: This applies errata 1257314 workaround to Neoverse-N1 438 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 439 440- ``ERRATA_N1_1262606``: This applies errata 1262606 workaround to Neoverse-N1 441 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 442 443- ``ERRATA_N1_1262888``: This applies errata 1262888 workaround to Neoverse-N1 444 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 445 446- ``ERRATA_N1_1275112``: This applies errata 1275112 workaround to Neoverse-N1 447 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 448 449- ``ERRATA_N1_1315703``: This applies errata 1315703 workaround to Neoverse-N1 450 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 451 452- ``ERRATA_N1_1542419``: This applies errata 1542419 workaround to Neoverse-N1 453 CPU. This needs to be enabled only for revisions r3p0 - r4p0 of the CPU. 454 455- ``ERRATA_N1_1868343``: This applies errata 1868343 workaround to Neoverse-N1 456 CPU. This needs to be enabled only for revision <= r4p0 of the CPU. 457 458- ``ERRATA_N1_1946160``: This applies errata 1946160 workaround to Neoverse-N1 459 CPU. This needs to be enabled for revisions r3p0, r3p1, r4p0, and r4p1, for 460 revisions r0p0, r1p0, and r2p0 there is no workaround. 461 462- ``ERRATA_N1_2743102``: This applies errata 2743102 workaround to Neoverse-N1 463 CPU. This needs to be enabled for all revisions <= r4p1 of the CPU and is 464 still open. 465 466For Neoverse V1, the following errata build flags are defined : 467 468- ``ERRATA_V1_1618635``: This applies errata 1618635 workaround to Neoverse-V1 469 CPU. This needs to be enabled for revision r0p0 of the CPU, it is fixed in 470 r1p0. 471 472- ``ERRATA_V1_1774420``: This applies errata 1774420 workaround to Neoverse-V1 473 CPU. This needs to be enabled only for revisions r0p0 and r1p0, it is fixed 474 in r1p1. 475 476- ``ERRATA_V1_1791573``: This applies errata 1791573 workaround to Neoverse-V1 477 CPU. This needs to be enabled only for revisions r0p0 and r1p0, it is fixed 478 in r1p1. 479 480- ``ERRATA_V1_1852267``: This applies errata 1852267 workaround to Neoverse-V1 481 CPU. This needs to be enabled only for revisions r0p0 and r1p0, it is fixed 482 in r1p1. 483 484- ``ERRATA_V1_1925756``: This applies errata 1925756 workaround to Neoverse-V1 485 CPU. This needs to be enabled for r0p0, r1p0, and r1p1, it is still open. 486 487- ``ERRATA_V1_1940577``: This applies errata 1940577 workaround to Neoverse-V1 488 CPU. This needs to be enabled only for revision r1p0 and r1p1 of the 489 CPU. 490 491- ``ERRATA_V1_1966096``: This applies errata 1966096 workaround to Neoverse-V1 492 CPU. This needs to be enabled for revisions r1p0 and r1p1 of the CPU, the 493 issue is present in r0p0 as well but there is no workaround for that 494 revision. It is still open. 495 496- ``ERRATA_V1_2139242``: This applies errata 2139242 workaround to Neoverse-V1 497 CPU. This needs to be enabled for revisions r0p0, r1p0, and r1p1 of the 498 CPU. It is still open. 499 500- ``ERRATA_V1_2216392``: This applies errata 2216392 workaround to Neoverse-V1 501 CPU. This needs to be enabled for revisions r1p0 and r1p1 of the CPU, the 502 issue is present in r0p0 as well but there is no workaround for that 503 revision. It is still open. 504 505- ``ERRATA_V1_2294912``: This applies errata 2294912 workaround to Neoverse-V1 506 CPU. This needs to be enabled for revisions r0p0, r1p0, and r1p1 and r1p2 of 507 the CPU. 508 509- ``ERRATA_V1_2348377``: This applies errata 2348377 workaroud to Neoverse-V1 510 CPU. This needs to be enabled for revisions r0p0, r1p0 and r1p1 of the CPU. 511 It has been fixed in r1p2. 512 513- ``ERRATA_V1_2372203``: This applies errata 2372203 workaround to Neoverse-V1 514 CPU. This needs to be enabled for revisions r0p0, r1p0 and r1p1 of the CPU. 515 It is still open. 516 517- ``ERRATA_V1_2701953``: This applies erratum 2701953 workaround to Neoverse-V1 518 CPU, this erratum affects system configurations that do not use an ARM 519 interconnect IP. This needs to be enabled for revisions r0p0, r1p0 and r1p1. 520 It has been fixed in r1p2. 521 522- ``ERRATA_V1_2743093``: This applies errata 2743093 workaround to Neoverse-V1 523 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1 and r1p2 of the 524 CPU. It is still open. 525 526- ``ERRATA_V1_2743233``: This applies erratum 2743233 workaround to Neoverse-V1 527 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1, and r1p2 of the 528 CPU. It is still open. 529 530- ``ERRATA_V1_2779461``: This applies erratum 2779461 workaround to Neoverse-V1 531 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1, r1p2 of the 532 CPU. It is still open. 533 534For Neoverse V2, the following errata build flags are defined : 535 536- ``ERRATA_V2_2618597``: This applies errata 2618597 workaround to Neoverse-V2 537 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in 538 r0p2. 539 540- ``ERRATA_V2_2662553``: This applies errata 2662553 workaround to Neoverse-V2 541 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in 542 r0p2. 543 544- ``ERRATA_V2_2719103``: This applies errata 2719103 workaround to Neoverse-V2 545 CPU, this affects system configurations that do not use and ARM interconnect 546 IP. This needs to be enabled for revisions r0p0 and r0p1. It has been fixed 547 in r0p2. 548 549- ``ERRATA_V2_2719105``: This applies errata 2719105 workaround to Neoverse-V2 550 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in 551 r0p2. 552 553- ``ERRATA_V2_2743011``: This applies errata 2743011 workaround to Neoverse-V2 554 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in 555 r0p2. 556 557- ``ERRATA_V2_2779510``: This applies errata 2779510 workaround to Neoverse-V2 558 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in 559 r0p2. 560 561- ``ERRATA_V2_2801372``: This applies errata 2801372 workaround to Neoverse-V2 562 CPU, this affects all configurations. This needs to be enabled for revisions 563 r0p0 and r0p1. It has been fixed in r0p2. 564 565- ``ERRATA_V2_3701771``: This applies errata 3701771 workaround to Neoverse-V2 566 CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2 and is 567 still open. 568 569- ``ERRATA_V2_3841324``: This applies errata 3841324 workaround to Neoverse-V2 570 CPU. This needs to be enabled only for revisions r0p0 and r0p1 of 571 the CPU. It is fixed in r0p2. 572 573For Neoverse V3, the following errata build flags are defined : 574 575- ``ERRATA_V3_2970647``: This applies errata 2970647 workaround to Neoverse-V3 576 CPU. This needs to be enabled for revision r0p0. It is fixed in r0p1. 577 578- ``ERRATA_V3_3701767``: This applies errata 3701767 workaround to Neoverse-V3 579 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2 of the CPU and 580 is still open. 581 582For Cortex-A710, the following errata build flags are defined : 583 584- ``ERRATA_A710_1901946``: This applies errata 1901946 workaround to 585 Cortex-A710 CPU. This needs to be enabled only for revision r1p0. It has 586 been fixed in r2p0. 587 588- ``ERRATA_A710_1916945``: This applies errata 1916945 workaround to 589 Cortex-A710 CPU. This needs to be enabled only for revisions r0p0 and r1p0. 590 It has been fixed in r2p0. 591 592- ``ERRATA_A710_1917258``: This applies errata 1917258 workaround to 593 Cortex-A710 CPU. This needs to be enabled only for revisions r0p0 and r1p0. 594 It has been fixed in r2p0. 595 596- ``ERRATA_A710_1927200``: This applies errata 1927200 workaround to 597 Cortex-A710 CPU. This needs to be enabled only for revisions r0p0 and r1p0. 598 It has been fixed in r2p0. 599 600- ``ERRATA_A710_1987031``: This applies errata 1987031 workaround to 601 Cortex-A710 CPU. This needs to be enabled only for revisions r0p0, r1p0 and 602 r2p0 of the CPU. It is still open. 603 604- ``ERRATA_A710_2081180``: This applies errata 2081180 workaround to 605 Cortex-A710 CPU. This needs to be enabled only for revisions r0p0, r1p0 and 606 r2p0 of the CPU. It is still open. 607 608- ``ERRATA_A710_2055002``: This applies errata 2055002 workaround to 609 Cortex-A710 CPU. This needs to be enabled for revisions r1p0, r2p0 of the CPU 610 and is still open. 611 612- ``ERRATA_A710_2017096``: This applies errata 2017096 workaround to 613 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 614 of the CPU and is still open. 615 616- ``ERRATA_A710_2083908``: This applies errata 2083908 workaround to 617 Cortex-A710 CPU. This needs to be enabled for revision r2p0 of the CPU and 618 is still open. 619 620- ``ERRATA_A710_2267065``: This applies errata 2267065 workaround to 621 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 622 of the CPU and is fixed in r2p1. 623 624- ``ERRATA_A710_2136059``: This applies errata 2136059 workaround to 625 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 626 of the CPU and is fixed in r2p1. 627 628- ``ERRATA_A710_2147715``: This applies errata 2147715 workaround to 629 Cortex-A710 CPU. This needs to be enabled for revision r2p0 of the CPU 630 and is fixed in r2p1. 631 632- ``ERRATA_A710_2216384``: This applies errata 2216384 workaround to 633 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 634 of the CPU and is fixed in r2p1. 635 636- ``ERRATA_A710_2282622``: This applies errata 2282622 workaround to 637 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and 638 r2p1 of the CPU and is still open. 639 640- ``ERRATA_A710_2291219``: This applies errata 2291219 workaround to 641 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 642 of the CPU and is fixed in r2p1. 643 644- ``ERRATA_A710_2008768``: This applies errata 2008768 workaround to 645 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 646 of the CPU and is fixed in r2p1. 647 648- ``ERRATA_A710_2371105``: This applies errata 2371105 workaround to 649 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 650 of the CPU and is fixed in r2p1. 651 652- ``ERRATA_A710_2701952``: This applies erratum 2701952 workaround to Cortex-A710 653 CPU, and applies to system configurations that do not use and ARM 654 interconnect IP. This needs to be enabled for r0p0, r1p0, r2p0 and r2p1 and 655 is still open. 656 657- ``ERRATA_A710_2742423``: This applies errata 2742423 workaround to 658 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and 659 r2p1 of the CPU and is still open. 660 661- ``ERRATA_A710_2768515``: This applies errata 2768515 workaround to 662 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and 663 r2p1 of the CPU and is still open. 664 665- ``ERRATA_A710_2778471``: This applies errata 2778471 workaround to Cortex-A710 666 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the 667 CPU and is still open. 668 669- ``ERRATA_A710_3701772``: This applies errata 3701772 workaround to Cortex-A710 670 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0, r2p1 of the 671 CPU and is still open. 672 673For Neoverse N2, the following errata build flags are defined : 674 675- ``ERRATA_N2_2002655``: This applies errata 2002655 workaround to Neoverse-N2 676 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 677 678- ``ERRATA_N2_2009478``: This applies errata 2009478 workaround to Neoverse-N2 679 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 680 681- ``ERRATA_N2_2067956``: This applies errata 2067956 workaround to Neoverse-N2 682 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 683 684- ``ERRATA_N2_2025414``: This applies errata 2025414 workaround to Neoverse-N2 685 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 686 687- ``ERRATA_N2_2189731``: This applies errata 2189731 workaround to Neoverse-N2 688 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 689 690- ``ERRATA_N2_2138956``: This applies errata 2138956 workaround to Neoverse-N2 691 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 692 693- ``ERRATA_N2_2242415``: This applies errata 2242415 workaround to Neoverse-N2 694 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 695 696- ``ERRATA_N2_2138958``: This applies errata 2138958 workaround to Neoverse-N2 697 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 698 699- ``ERRATA_N2_2242400``: This applies errata 2242400 workaround to Neoverse-N2 700 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 701 702- ``ERRATA_N2_2280757``: This applies errata 2280757 workaround to Neoverse-N2 703 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 704 705- ``ERRATA_N2_2326639``: This applies errata 2326639 workaround to Neoverse-N2 706 CPU. This needs to be enabled for revision r0p0 of the CPU, it is fixed in 707 r0p1. 708 709- ``ERRATA_N2_2340933``: This applies errata 2340933 workaround to Neoverse-N2 710 CPU. This needs to be enabled for revision r0p0 of the CPU, it is fixed in 711 r0p1. 712 713- ``ERRATA_N2_2346952``: This applies errata 2346952 workaround to Neoverse-N2 714 CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2 of the CPU, 715 it is fixed in r0p3. 716 717- ``ERRATA_N2_2376738``: This applies errata 2376738 workaround to Neoverse-N2 718 CPU. This needs to be enabled for revision r0p0, r0p1, r0p2, r0p3 and is still open. 719 720- ``ERRATA_N2_2388450``: This applies errata 2388450 workaround to Neoverse-N2 721 CPU. This needs to be enabled for revision r0p0 of the CPU, it is fixed in 722 r0p1. 723 724- ``ERRATA_N2_2743014``: This applies errata 2743014 workaround to Neoverse-N2 725 CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2. It is fixed 726 in r0p3. 727 728- ``ERRATA_N2_2743089``: This applies errata 2743089 workaround to Neoverse-N2 729 CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2. It is fixed 730 in r0p3. 731 732- ``ERRATA_N2_2728475``: This applies erratum 2728475 workaround to Neoverse-N2 733 CPU, this erratum affects system configurations that do not use and ARM 734 interconnect IP. This needs to be enabled for revisions r0p0, r0p1 and r0p2. 735 It is fixed in r0p3. 736 737- ``ERRATA_N2_2779511``: This applies errata 2779511 workaround to Neoverse-N2 738 CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2. It is fixed 739 in r0p3. 740 741- ``ERRATA_N2_3701773``: This applies errata 3701773 workaround to Neoverse-N2 742 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2, r0p3 and is 743 still open. 744 745For Neoverse N3, the following errata build flags are defined : 746 747- ``ERRATA_N3_3699563``: This applies errata 3699563 workaround to Neoverse-N3 748 CPU. This needs to be enabled for revisions r0p0 and is still open. 749 750For Cortex-X2, the following errata build flags are defined : 751 752- ``ERRATA_X2_1901946``: This applies errata 1901946 workaround to Cortex-X2 753 CPU. This needs to be enabled only for r1p0, it is fixed in r2p0. 754 755- ``ERRATA_X2_1916945``: This applies errata 1916945 workaround to Cortex-X2 756 CPU. This needs to be enabled only for revisions r0p0 and r1p0 of the CPU, it 757 is fixed in r2p0. 758 759- ``ERRATA_X2_1917258``: This applies errata 1917258 workaround to Cortex-X2 760 CPU. This needs to be enabled only for revisions r0p0 and r1p0 of the CPU, it 761 is fixed in r2p0. 762 763- ``ERRATA_X2_1927200``: This applies errata 1927200 workaround to Cortex-X2 764 CPU. This needs to be enabled only for revisions r0p0 and r1p0 of the CPU, it 765 is fixed in r2p0. 766 767- ``ERRATA_X2_1934260``: This applies errata 1934260 workaround to Cortex-X2 768 CPU. This needs to be enabled only for revision r1p0 of the CPU, it is fixed 769 in r2p0. 770 771- ``ERRATA_X2_2002765``: This applies errata 2002765 workaround to Cortex-X2 772 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 773 CPU, it is fixed in r2p1. 774 775- ``ERRATA_X2_2017096``: This applies errata 2017096 workaround to Cortex-X2 776 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 777 CPU, it is fixed in r2p1. 778 779- ``ERRATA_X2_2081180``: This applies errata 2081180 workaround to Cortex-X2 780 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 781 CPU, it is fixed in r2p1. 782 783- ``ERRATA_X2_2083908``: This applies errata 2083908 workaround to Cortex-X2 784 CPU. This needs to be enabled only for revision r2p0 of the CPU, it is fixed 785 in r2p1. 786 787- ``ERRATA_X2_2136059``: This applies errata 2136059 workaround to Cortex-X2 788 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 789 CPU, it is fixed in r2p1. 790 791- ``ERRATA_X2_2147715``: This applies errata 2147715 workaround to Cortex-X2 792 CPU. This needs to be enabled only for revision r2p0 of the CPU, it is fixed 793 in r2p1. 794 795- ``ERRATA_X2_2216384``: This applies errata 2216384 workaround to Cortex-X2 796 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 797 CPU, it is fixed in r2p1. 798 799- ``ERRATA_X2_2267065``: This applies errata 2267065 workaround to Cortex-X2 800 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 801 CPU, it is fixed in r2p1. 802 803- ``ERRATA_X2_2282622``: This applies errata 2282622 workaround to Cortex-X2 804 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the 805 CPU and is still open. 806 807- ``ERRATA_X2_2291219``: This applies errata 2291219 workaround to Cortex-X2 808 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 809 CPU, it is fixed in r2p1. 810 811- ``ERRATA_X2_2371105``: This applies errata 2371105 workaround to Cortex-X2 812 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 813 CPU, it is fixed in r2p1. 814 815- ``ERRATA_X2_2701952``: This applies errata 2701952 workaround to Cortex-X2 816 CPU and affects system configurations that do not use an Arm interconnect IP. 817 This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 and is 818 still open. 819 820- ``ERRATA_X2_2742423``: This applies errata 2742423 workaround to Cortex-X2 821 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the 822 CPU and is still open. 823 824- ``ERRATA_X2_2768515``: This applies errata 2768515 workaround to Cortex-X2 825 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the 826 CPU and is still open. 827 828- ``ERRATA_X2_2778471``: This applies errata 2778471 workaround to Cortex-X2 829 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the 830 CPU and is still open. 831 832- ``ERRATA_X2_3701772``: This applies errata 3701772 workaround to Cortex-X2 833 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the 834 CPU and is still open. 835 836For Cortex-X3, the following errata build flags are defined : 837 838- ``ERRATA_X3_2266875``: This applies errata 2266875 workaround to the Cortex-X3 839 CPU. This needs to be enabled only for revisions r0p0 and r1p0 of the CPU, it 840 is fixed in r1p1. 841 842- ``ERRATA_X3_2302506``: This applies errata 2302506 workaround to the Cortex-X3 843 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r1p1, it is 844 fixed in r1p2. 845 846- ``ERRATA_X3_2313909``: This applies errata 2313909 workaround to 847 Cortex-X3 CPU. This needs to be enabled only for revisions r0p0 and r1p0 848 of the CPU, it is fixed in r1p1. 849 850- ``ERRATA_X3_2372204``: This applies errata 2372204 workaround to 851 Cortex-X3 CPU. This needs to be enabled only for revisions r0p0 and r1p0 852 of the CPU, it is fixed in r1p1. 853 854- ``ERRATA_X3_2615812``: This applies errata 2615812 workaround to Cortex-X3 855 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r1p1 of the 856 CPU, it is fixed in r1p2. 857 858- ``ERRATA_X3_2641945``: This applies errata 2641945 workaround to Cortex-X3 859 CPU. This needs to be enabled only for revisions r0p0 and r1p0 of the CPU. 860 It is fixed in r1p1. 861 862- ``ERRATA_X3_2701951``: This applies erratum 2701951 workaround to Cortex-X3 863 CPU and affects system configurations that do not use an ARM interconnect 864 IP. This needs to be applied to revisions r0p0, r1p0 and r1p1. It is fixed 865 in r1p2. 866 867- ``ERRATA_X3_2742421``: This applies errata 2742421 workaround to 868 Cortex-X3 CPU. This needs to be enabled only for revisions r0p0, r1p0 and 869 r1p1. It is fixed in r1p2. 870 871- ``ERRATA_X3_2743088``: This applies errata 2743088 workaround to Cortex-X3 872 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r1p1. It is 873 fixed in r1p2. 874 875- ``ERRATA_X3_2779509``: This applies errata 2779509 workaround to Cortex-X3 876 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r1p1 of the 877 CPU. It is fixed in r1p2. 878 879- ``ERRATA_X3_3213672``: This applies errata 3213672 workaround to Cortex-X3 880 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1 and r1p2 881 of the CPU. It is still open. 882 883- ``ERRATA_X3_3692984``: This applies errata 3692984 workaround to Cortex-X3 884 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1 and r1p2 885 of the CPU. It is still open. 886 887- ``ERRATA_X3_3701769``: This applies errata 3701769 workaround to Cortex-X3 888 CPU. This needs to be enabled only for revisions r0p0, r1p0, r1p1 and r1p2 889 of the CPU and it is still open. 890 891- ``ERRATA_X3_3827463``: This applies errata 3827463 workaround to Cortex-X3 892 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r1p1 of 893 the CPU. It is fixed in r1p2. 894 895For Cortex-X4, the following errata build flags are defined : 896 897- ``ERRATA_X4_2701112``: This applies erratum 2701112 workaround to Cortex-X4 898 CPU and affects system configurations that do not use an Arm interconnect IP. 899 This needs to be enabled for revisions r0p0 and is fixed in r0p1. 900 The workaround for this erratum is not implemented in EL3, but the flag can 901 be enabled/disabled at the platform level. The flag is used when the errata ABI 902 feature is enabled and can assist the Kernel in the process of 903 mitigation of the erratum. 904 905- ``ERRATA_X4_2726228``: This applies erratum 2726228 workaround to Cortex-X4 906 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in 907 r0p2. 908 909- ``ERRATA_X4_2740089``: This applies errata 2740089 workaround to Cortex-X4 910 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed 911 in r0p2. 912 913- ``ERRATA_X4_2763018``: This applies errata 2763018 workaround to Cortex-X4 914 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in r0p2. 915 916- ``ERRATA_X4_2816013``: This applies errata 2816013 workaround to Cortex-X4 917 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in r0p2. 918 919- ``ERRATA_X4_2897503``: This applies errata 2897503 workaround to Cortex-X4 920 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in r0p2. 921 922- ``ERRATA_X4_2923985``: This applies errata 2923985 workaround to Cortex-X4 923 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in r0p2. 924 925- ``ERRATA_X4_2957258``: This applies errata 2957258 workaround to Cortex-X4 926 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in r0p2. 927 928- ``ERRATA_X4_3076789``: This applies errata 3076789 workaround to Cortex-X4 929 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in r0p2. 930 931- ``ERRATA_X4_3133195``: This applies errata 3133195 workaround to Cortex-X4 932 CPU. This needs to be enabled for revision r0p2. It is fixed in r0p3. 933 934- ``ERRATA_X4_3701758``: This applies errata 3701758 workaround to Cortex-X4 935 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2 and r0p3. 936 It is still open. 937 938- ``ERRATA_X4_3887999``: This applies errata 3887999 workaround to Cortex-X4 939 CPU. This needs to be enabled for revision r0p0, r0p1, r0p2 and r0p3. 940 It is still open. 941 942For Cortex-X925, the following errata build flags are defined : 943 944- ``ERRATA_X925_2963999``: This applies errata 2963999 workaround to Cortex-X925 945 CPU. This needs to be enabled for revision r0p0. It is fixed in r0p1. 946 947- ``ERRATA_X925_3701747``: This applies errata 3701747 workaround to Cortex-X925 948 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is still open. 949 950For Cortex-A510, the following errata build flags are defined : 951 952- ``ERRATA_A510_2008766``: This applies errata 2008766 workaround to 953 Cortex-A510 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2, 954 r0p3, r1p0, r1p1, r1p2 and r1p3. It is still open. 955 956- ``ERRATA_A510_2288014``: This applies errata 2288014 workaround to 957 Cortex-A510 CPU. This needs to be enabled only for revisions r0p0, r0p1, 958 r0p2, r0p3 and r1p0, it is fixed in r1p1. 959 960- ``ERRATA_A510_2042739``: This applies errata 2042739 workaround to 961 Cortex-A510 CPU. This needs to be enabled only for revisions r0p0, r0p1 and 962 r0p2, it is fixed in r0p3. 963 964- ``ERRATA_A510_2041909``: This applies errata 2041909 workaround to 965 Cortex-A510 CPU. This needs to be enabled only for revision r0p2 and is fixed 966 in r0p3. The issue is also present in r0p0 and r0p1 but there is no 967 workaround for those revisions. 968 969- ``ERRATA_A510_2080326``: This applies errata 2080326 workaround to 970 Cortex-A510 CPU. This needs to be enabled only for revision r0p2 and is 971 fixed in r0p3. This issue is also present in r0p0 and r0p1 but there is no 972 workaround for those revisions. 973 974- ``ERRATA_A510_2169012``: This applies errata 2169012 workaround to 975 Cortex-A510 CPU. This needs to be enabled only for revisions r0p0, r0p1, 976 r0p2, r0p3 and r1p0, it is fixed in r1p1. 977 978- ``ERRATA_A510_2218134``: This applies errata 2218134 workaround to 979 Cortex-A510 CPU. This needs to be enabled only for revision r1p0 and is fixed 980 in r1p1. 981 982- ``ERRATA_A510_2250311``: This applies errata 2250311 workaround to 983 Cortex-A510 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2, 984 r0p3 and r1p0, it is fixed in r1p1. This workaround disables MPMM even if 985 ENABLE_MPMM=1. 986 987- ``ERRATA_A510_2218950``: This applies errata 2218950 workaround to 988 Cortex-A510 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2, 989 r0p3 and r1p0, it is fixed in r1p1. 990 991- ``ERRATA_A510_2172148``: This applies errata 2172148 workaround to 992 Cortex-A510 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2, 993 r0p3 and r1p0, it is fixed in r1p1. 994 995- ``ERRATA_A510_2347730``: This applies errata 2347730 workaround to 996 Cortex-A510 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2, 997 r0p3, r1p0 and r1p1. It is fixed in r1p2. 998 999- ``ERRATA_A510_2371937``: This applies errata 2371937 workaround to 1000 Cortex-A510 CPU. This needs to applied for revisions r0p0, r0p1, r0p2, 1001 r0p3, r1p0, r1p1, and is fixed in r1p2. 1002 1003- ``ERRATA_A510_2420992``: This applies errata 2420992 workaround to 1004 Cortex-A510 CPU. This needs to applied for revisions r1p0 and r1p1, and is 1005 fixed in r1p2. 1006 1007- ``ERRATA_A510_2666669``: This applies errata 2666669 workaround to 1008 Cortex-A510 CPU. This needs to applied for revisions r0p0, r0p1, r0p2, 1009 r0p3, r1p0, r1p1. It is fixed in r1p2. 1010 1011- ``ERRATA_A510_2684597``: This applies erratum 2684597 workaround to 1012 Cortex-A510 CPU. This needs to be applied to revision r0p0, r0p1, r0p2, 1013 r0p3, r1p0, r1p1 and r1p2. It is fixed in r1p3. 1014 1015- ``ERRATA_A510_2971420``: This applies erratum 2971420 workaround to 1016 Cortex-A510 CPU. This needs to be applied to revisions r0p1, r0p2, r0p3, 1017 r1p0, r1p1, r1p2 and r1p3 and is still open. 1018 1019- ``ERRATA_A510_3672349``: This applies erratum 3672349 workaround to 1020 Cortex-A510 CPU. This needs to be applied to revisions r0p1, r0p2, r0p3, 1021 r1p0, r1p1, r1p2 and r1p3 and is still open. 1022 1023- ``ERRATA_A510_3704847``: This applies erratum 3704847 workaround to 1024 Cortex-A510 CPU. This needs to be applied to revisions r0p1, r0p2, r0p3, 1025 r1p0, r1p1, r1p2 and r1p3 and is still open. 1026 1027For Cortex-A520, the following errata build flags are defined : 1028 1029- ``ERRATA_A520_2630792``: This applies errata 2630792 workaround to 1030 Cortex-A520 CPU. This needs to applied for revisions r0p0, r0p1 of the 1031 CPU and is still open. 1032 1033- ``ERRATA_A520_2858100``: This applies errata 2858100 workaround to 1034 Cortex-A520 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1035 It is still open. 1036 1037- ``ERRATA_A520_2938996``: This applies errata 2938996 workaround to 1038 Cortex-A520 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1039 It is fixed in r0p2. 1040 1041For Cortex-A715, the following errata build flags are defined : 1042 1043- ``ERRATA_A715_2331818``: This applies errata 2331818 workaround to 1044 Cortex-A715 CPU. This needs to be enabled for revisions r0p0 and r1p0. 1045 It is fixed in r1p1. 1046 1047- ``ERRATA_A715_2344187``: This applies errata 2344187 workaround to 1048 Cortex-A715 CPU. This needs to be enabled for revisions r0p0 and r1p0. It is 1049 fixed in r1p1. 1050 1051- ``ERRATA_A715_2413290``: This applies errata 2413290 workaround to 1052 Cortex-A715 CPU. This needs to be enabled only for revision r1p0 and 1053 when SPE(Statistical profiling extension)=True. The errata is fixed 1054 in r1p1. 1055 1056- ``ERRATA_A715_2420947``: This applies errata 2420947 workaround to 1057 Cortex-A715 CPU. This needs to be enabled only for revision r1p0. 1058 It is fixed in r1p1. 1059 1060- ``ERRATA_A715_2429384``: This applies errata 2429384 workaround to 1061 Cortex-A715 CPU. This needs to be enabled for revision r1p0. There is no 1062 workaround for revision r0p0. It is fixed in r1p1. 1063 1064- ``ERRATA_A715_2561034``: This applies errata 2561034 workaround to 1065 Cortex-A715 CPU. This needs to be enabled only for revision r1p0. 1066 It is fixed in r1p1. 1067 1068- ``ERRATA_A715_2728106``: This applies errata 2728106 workaround to 1069 Cortex-A715 CPU. This needs to be enabled for revisions r0p0, r1p0 1070 and r1p1. It is fixed in r1p2. 1071 1072- ``ERRATA_A715_2804830``: This applies errata 2804830 workaround to 1073 Cortex-A715 CPU. This needs to be enabled for revisions r0p0, r1p0, 1074 r1p1 and r1p2. It is fixed in r1p3. 1075 1076- ``ERRATA_A715_3699560``: This applies errata 3699560 workaround to 1077 Cortex-A715 CPU. This needs to be enabled for revisions r0p0, r1p0, 1078 r1p2 and r1p3. It is still open. 1079 1080For Cortex-A720, the following errata build flags are defined : 1081 1082- ``ERRATA_A720_2729604``: This applies errata 2729604 workaround to 1083 Cortex-A720 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1084 It is fixed in r0p2. 1085 1086- ``ERRATA_A720_2792132``: This applies errata 2792132 workaround to 1087 Cortex-A720 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1088 It is fixed in r0p2. 1089 1090- ``ERRATA_A720_2844092``: This applies errata 2844092 workaround to 1091 Cortex-A720 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1092 It is fixed in r0p2. 1093 1094- ``ERRATA_A720_2926083``: This applies errata 2926083 workaround to 1095 Cortex-A720 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1096 It is fixed in r0p2. 1097 1098- ``ERRATA_A720_2940794``: This applies errata 2940794 workaround to 1099 Cortex-A720 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1100 It is fixed in r0p2. 1101 1102- ``ERRATA_A720_3699561``: This applies errata 3699561 workaround to 1103 Cortex-A720 CPU. This needs to be enabled for revisions r0p0, r0p1 1104 and r0p2. It is still open. 1105 1106- ``ERRATA_A720_3711910``: This applies errata 3711910 workaround to 1107 Cortex-A720 CPU. This needs to be enabled for revisions r0p0, r0p1 1108 and r0p2. It is still open. 1109 1110For Cortex-A720_AE, the following errata build flags are defined : 1111 1112- ``ERRATA_A720_AE_3699562``: This applies errata 3699562 workaround 1113 to Cortex-A720_AE CPU. This needs to be enabled for revisions r0p0. 1114 It is still open. 1115 1116For Cortex-A725, the following errata build flags are defined : 1117 1118- ``ERRATA_A725_3699564``: This applies errata 3699564 workaround to 1119 Cortex-A725 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1120 It is fixed in r0p2. 1121 1122DSU Errata Workarounds 1123---------------------- 1124 1125Similar to CPU errata, TF-A also implements workarounds for DSU (DynamIQ 1126Shared Unit) errata. The DSU errata details can be found in the respective Arm 1127documentation: 1128 1129- `Arm DSU Software Developers Errata Notice`_. 1130 1131Each erratum is identified by an ``ID``, as defined in the DSU errata notice 1132document. Thus, the build flags which enable/disable the errata workarounds 1133have the format ``ERRATA_DSU_<ID>``. The implementation and application logic 1134of DSU errata workarounds are similar to `CPU errata workarounds`_. 1135 1136For DSU errata, the following build flags are defined: 1137 1138- ``ERRATA_DSU_798953``: This applies errata 798953 workaround for the 1139 affected DSU configurations. This errata applies only for those DSUs that 1140 revision is r0p0 (on r0p1 it is fixed). However, please note that this 1141 workaround results in increased DSU power consumption on idle. 1142 1143- ``ERRATA_DSU_936184``: This applies errata 936184 workaround for the 1144 affected DSU configurations. This errata applies only for those DSUs that 1145 contain the ACP interface **and** the DSU revision is older than r2p0 (on 1146 r2p0 it is fixed). However, please note that this workaround results in 1147 increased DSU power consumption on idle. 1148 1149- ``ERRATA_DSU_2313941``: This applies errata 2313941 workaround for the 1150 affected DSU configurations. This errata applies for those DSUs with 1151 revisions r0p0, r1p0, r2p0, r2p1, r3p0, r3p1 and is still open. However, 1152 please note that this workaround results in increased DSU power consumption 1153 on idle. 1154 1155- ``ERRATA_DSU_2900952``: This applies errata 2900952 workaround for the 1156 affected DSU-120 configurations. This erratum applies to some r2p0 1157 implementations and is fixed in r2p1. The affected r2p0 implementations 1158 are determined by reading the IMP_CLUSTERREVIDR_EL1[1] register bit 1159 and making sure it's clear. 1160 1161CPU Specific optimizations 1162-------------------------- 1163 1164This section describes some of the optimizations allowed by the CPU micro 1165architecture that can be enabled by the platform as desired. 1166 1167- ``SKIP_A57_L1_FLUSH_PWR_DWN``: This flag enables an optimization in the 1168 Cortex-A57 cluster power down sequence by not flushing the Level 1 data 1169 cache. The L1 data cache and the L2 unified cache are inclusive. A flush 1170 of the L2 by set/way flushes any dirty lines from the L1 as well. This 1171 is a known safe deviation from the Cortex-A57 TRM defined power down 1172 sequence. Each Cortex-A57 based platform must make its own decision on 1173 whether to use the optimization. 1174 1175- ``A53_DISABLE_NON_TEMPORAL_HINT``: This flag disables the cache non-temporal 1176 hint. The LDNP/STNP instructions as implemented on Cortex-A53 do not behave 1177 in a way most programmers expect, and will most probably result in a 1178 significant speed degradation to any code that employs them. The Armv8-A 1179 architecture (see Arm DDI 0487A.h, section D3.4.3) allows cores to ignore 1180 the non-temporal hint and treat LDNP/STNP as LDP/STP instead. Enabling this 1181 flag enforces this behaviour. This needs to be enabled only for revisions 1182 <= r0p3 of the CPU and is enabled by default. 1183 1184- ``A57_DISABLE_NON_TEMPORAL_HINT``: This flag has the same behaviour as 1185 ``A53_DISABLE_NON_TEMPORAL_HINT`` but for Cortex-A57. This needs to be 1186 enabled only for revisions <= r1p2 of the CPU and is enabled by default, 1187 as recommended in section "4.7 Non-Temporal Loads/Stores" of the 1188 `Cortex-A57 Software Optimization Guide`_. 1189 1190- ''A57_ENABLE_NON_CACHEABLE_LOAD_FWD'': This flag enables non-cacheable 1191 streaming enhancement feature for Cortex-A57 CPUs. Platforms can set 1192 this bit only if their memory system meets the requirement that cache 1193 line fill requests from the Cortex-A57 processor are atomic. Each 1194 Cortex-A57 based platform must make its own decision on whether to use 1195 the optimization. This flag is disabled by default. 1196 1197- ``NEOVERSE_Nx_EXTERNAL_LLC``: This flag indicates that an external last 1198 level cache(LLC) is present in the system, and that the DataSource field 1199 on the master CHI interface indicates when data is returned from the LLC. 1200 This is used to control how the LL_CACHE* PMU events count. 1201 Default value is 0 (Disabled). 1202 1203GIC Errata Workarounds 1204---------------------- 1205- ``GIC600_ERRATA_WA_2384374``: This flag applies part 2 of errata 2384374 1206 workaround for the affected GIC600 and GIC600-AE implementations. It applies 1207 to implementations of GIC600 and GIC600-AE with revisions less than or equal 1208 to r1p6 and r0p2 respectively. If the platform sets GICV3_SUPPORT_GIC600, 1209 then this flag is enabled; otherwise, it is 0 (Disabled). 1210 1211-------------- 1212 1213*Copyright (c) 2014-2025, Arm Limited and Contributors. All rights reserved.* 1214 1215.. _CVE-2017-5715: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5715 1216.. _CVE-2018-3639: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3639 1217.. _CVE-2022-23960: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23960 1218.. _Cortex-A53 MPCore Software Developers Errata Notice: http://infocenter.arm.com/help/topic/com.arm.doc.epm048406/index.html 1219.. _Cortex-A57 MPCore Software Developers Errata Notice: http://infocenter.arm.com/help/topic/com.arm.doc.epm049219/index.html 1220.. _Cortex-A72 MPCore Software Developers Errata Notice: http://infocenter.arm.com/help/topic/com.arm.doc.epm012079/index.html 1221.. _Cortex-A57 Software Optimization Guide: http://infocenter.arm.com/help/topic/com.arm.doc.uan0015b/Cortex_A57_Software_Optimization_Guide_external.pdf 1222.. _Arm DSU Software Developers Errata Notice: http://infocenter.arm.com/help/topic/com.arm.doc.epm138168/index.html 1223