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: 53For example: `Cortex-A72 MPCore Software Developers Errata Notice`_ 54 55The errata workarounds are implemented for a particular revision or a set of 56processor revisions. This is checked by the reset handler at runtime. Each 57errata workaround is identified by its ``ID`` as specified in the processor's 58errata notice document. The format of the define used to enable/disable the 59errata workaround is ``ERRATA_<Processor name>_<ID>``, where the ``Processor name`` 60is for example ``A57`` for the ``Cortex_A57`` CPU. 61 62Refer to :ref:`firmware_design_cpu_errata_implementation` for information on how to 63write errata workaround functions. 64 65All workarounds are disabled by default. The platform is responsible for 66enabling these workarounds according to its requirement by defining the 67errata workaround build flags in the platform specific makefile. In case 68these workarounds are enabled for the wrong CPU revision then the errata 69workaround is not applied. In the DEBUG build, this is indicated by 70printing a warning to the crash console. 71 72In the current implementation, a platform which has more than 1 variant 73with different revisions of a processor has no runtime mechanism available 74for it to specify which errata workarounds should be enabled or not. 75 76The value of the build flags is 0 by default, that is, disabled. A value of 1 77will enable it. 78 79For Cortex-A9, the following errata build flags are defined : 80 81- ``ERRATA_A9_794073``: This applies errata 794073 workaround to Cortex-A9 82 CPU. This needs to be enabled for all revisions of the CPU. 83 84For Cortex-A15, the following errata build flags are defined : 85 86- ``ERRATA_A15_816470``: This applies errata 816470 workaround to Cortex-A15 87 CPU. This needs to be enabled only for revision >= r3p0 of the CPU. 88 89- ``ERRATA_A15_827671``: This applies errata 827671 workaround to Cortex-A15 90 CPU. This needs to be enabled only for revision >= r3p0 of the CPU. 91 92For Cortex-A17, the following errata build flags are defined : 93 94- ``ERRATA_A17_852421``: This applies errata 852421 workaround to Cortex-A17 95 CPU. This needs to be enabled only for revision <= r1p2 of the CPU. 96 97- ``ERRATA_A17_852423``: This applies errata 852423 workaround to Cortex-A17 98 CPU. This needs to be enabled only for revision <= r1p2 of the CPU. 99 100For Cortex-A35, the following errata build flags are defined : 101 102- ``ERRATA_A35_855472``: This applies errata 855472 workaround to Cortex-A35 103 CPUs. This needs to be enabled only for revision r0p0 of Cortex-A35. 104 105For Cortex-A53, the following errata build flags are defined : 106 107- ``ERRATA_A53_819472``: This applies errata 819472 workaround to all 108 CPUs. This needs to be enabled only for revision <= r0p1 of Cortex-A53. 109 110- ``ERRATA_A53_824069``: This applies errata 824069 workaround to all 111 CPUs. This needs to be enabled only for revision <= r0p2 of Cortex-A53. 112 113- ``ERRATA_A53_826319``: This applies errata 826319 workaround to Cortex-A53 114 CPU. This needs to be enabled only for revision <= r0p2 of the CPU. 115 116- ``ERRATA_A53_827319``: This applies errata 827319 workaround to all 117 CPUs. This needs to be enabled only for revision <= r0p2 of Cortex-A53. 118 119- ``ERRATA_A53_835769``: This applies erratum 835769 workaround at compile and 120 link time to Cortex-A53 CPU. This needs to be enabled for some variants of 121 revision <= r0p4. This workaround can lead the linker to create ``*.stub`` 122 sections. 123 124- ``ERRATA_A53_836870``: This applies errata 836870 workaround to Cortex-A53 125 CPU. This needs to be enabled only for revision <= r0p3 of the CPU. From 126 r0p4 and onwards, this errata is enabled by default in hardware. Identical to 127 ``A53_DISABLE_NON_TEMPORAL_HINT``. 128 129- ``ERRATA_A53_843419``: This applies erratum 843419 workaround at link time 130 to Cortex-A53 CPU. This needs to be enabled for some variants of revision 131 <= r0p4. This workaround can lead the linker to emit ``*.stub`` sections 132 which are 4kB aligned. 133 134- ``ERRATA_A53_855873``: This applies errata 855873 workaround to Cortex-A53 135 CPUs. Though the erratum is present in every revision of the CPU, 136 this workaround is only applied to CPUs from r0p3 onwards, which feature 137 a chicken bit in CPUACTLR_EL1 to enable a hardware workaround. 138 Earlier revisions of the CPU have other errata which require the same 139 workaround in software, so they should be covered anyway. 140 141- ``ERRATA_A53_1530924``: This applies errata 1530924 workaround to all 142 revisions of Cortex-A53 CPU. 143 144For Cortex-A55, the following errata build flags are defined : 145 146- ``ERRATA_A55_768277``: This applies errata 768277 workaround to Cortex-A55 147 CPU. This needs to be enabled only for revision r0p0 of the CPU. 148 149- ``ERRATA_A55_778703``: This applies errata 778703 workaround to Cortex-A55 150 CPU. This needs to be enabled only for revision r0p0 of the CPU. 151 152- ``ERRATA_A55_798797``: This applies errata 798797 workaround to Cortex-A55 153 CPU. This needs to be enabled only for revision r0p0 of the CPU. 154 155- ``ERRATA_A55_846532``: This applies errata 846532 workaround to Cortex-A55 156 CPU. This needs to be enabled only for revision <= r0p1 of the CPU. 157 158- ``ERRATA_A55_903758``: This applies errata 903758 workaround to Cortex-A55 159 CPU. This needs to be enabled only for revision <= r0p1 of the CPU. 160 161- ``ERRATA_A55_1221012``: This applies errata 1221012 workaround to Cortex-A55 162 CPU. This needs to be enabled only for revision <= r1p0 of the CPU. 163 164- ``ERRATA_A55_1530923``: This applies errata 1530923 workaround to all 165 revisions of Cortex-A55 CPU. 166 167For Cortex-A57, the following errata build flags are defined : 168 169- ``ERRATA_A57_806969``: This applies errata 806969 workaround to Cortex-A57 170 CPU. This needs to be enabled only for revision r0p0 of the CPU. 171 172- ``ERRATA_A57_813419``: This applies errata 813419 workaround to Cortex-A57 173 CPU. This needs to be enabled only for revision r0p0 of the CPU. 174 175- ``ERRATA_A57_813420``: This applies errata 813420 workaround to Cortex-A57 176 CPU. This needs to be enabled only for revision r0p0 of the CPU. 177 178- ``ERRATA_A57_814670``: This applies errata 814670 workaround to Cortex-A57 179 CPU. This needs to be enabled only for revision r0p0 of the CPU. 180 181- ``ERRATA_A57_817169``: This applies errata 817169 workaround to Cortex-A57 182 CPU. This needs to be enabled only for revision <= r0p1 of the CPU. 183 184- ``ERRATA_A57_826974``: This applies errata 826974 workaround to Cortex-A57 185 CPU. This needs to be enabled only for revision <= r1p1 of the CPU. 186 187- ``ERRATA_A57_826977``: This applies errata 826977 workaround to Cortex-A57 188 CPU. This needs to be enabled only for revision <= r1p1 of the CPU. 189 190- ``ERRATA_A57_828024``: This applies errata 828024 workaround to Cortex-A57 191 CPU. This needs to be enabled only for revision <= r1p1 of the CPU. 192 193- ``ERRATA_A57_829520``: This applies errata 829520 workaround to Cortex-A57 194 CPU. This needs to be enabled only for revision <= r1p2 of the CPU. 195 196- ``ERRATA_A57_833471``: This applies errata 833471 workaround to Cortex-A57 197 CPU. This needs to be enabled only for revision <= r1p2 of the CPU. 198 199- ``ERRATA_A57_859972``: This applies errata 859972 workaround to Cortex-A57 200 CPU. This needs to be enabled only for revision <= r1p3 of the CPU. 201 202- ``ERRATA_A57_1319537``: This applies errata 1319537 workaround to all 203 revisions of Cortex-A57 CPU. 204 205For Cortex-A65, the following errata build flags are defined : 206 207- ``ERRATA_A65_1179935``: This applies errata 1179935 workaround to Cortex-A65 208 CPU. This needs to be enabled only for revision r0p0 of the CPU, and is fixed 209 in r1p0. 210 211- ``ERRATA_A65_1227419``: This applies errata 1227419 workaround to Cortex-A65 212 CPU. This needs to be enabled only for revision r0p0 and r1p0 of the CPU and 213 is fixed in r1p1. 214 215- ``ERRATA_A65_1541130``: This applies errata 1541130 workaround to r0p0, r1p0, 216 r1p1, r1p2 revisions of the CPU and is still open. 217 218For Cortex-A72, the following errata build flags are defined : 219 220- ``ERRATA_A72_859971``: This applies errata 859971 workaround to Cortex-A72 221 CPU. This needs to be enabled only for revision <= r0p3 of the CPU. 222 223- ``ERRATA_A72_1319367``: This applies errata 1319367 workaround to all 224 revisions of Cortex-A72 CPU. 225 226For Cortex-A73, the following errata build flags are defined : 227 228- ``ERRATA_A73_852427``: This applies errata 852427 workaround to Cortex-A73 229 CPU. This needs to be enabled only for revision r0p0 of the CPU. 230 231- ``ERRATA_A73_855423``: This applies errata 855423 workaround to Cortex-A73 232 CPU. This needs to be enabled only for revision <= r0p1 of the CPU. 233 234For Cortex-A75, the following errata build flags are defined : 235 236- ``ERRATA_A75_764081``: This applies errata 764081 workaround to Cortex-A75 237 CPU. This needs to be enabled only for revision r0p0 of the CPU. 238 239- ``ERRATA_A75_790748``: This applies errata 790748 workaround to Cortex-A75 240 CPU. This needs to be enabled only for revision r0p0 of the CPU. 241 242For Cortex-A76, the following errata build flags are defined : 243 244- ``ERRATA_A76_1073348``: This applies errata 1073348 workaround to Cortex-A76 245 CPU. This needs to be enabled only for revision <= r1p0 of the CPU. 246 247- ``ERRATA_A76_1130799``: This applies errata 1130799 workaround to Cortex-A76 248 CPU. This needs to be enabled only for revision <= r2p0 of the CPU. 249 250- ``ERRATA_A76_1220197``: This applies errata 1220197 workaround to Cortex-A76 251 CPU. This needs to be enabled only for revision <= r2p0 of the CPU. 252 253- ``ERRATA_A76_1257314``: This applies errata 1257314 workaround to Cortex-A76 254 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 255 256- ``ERRATA_A76_1262606``: This applies errata 1262606 workaround to Cortex-A76 257 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 258 259- ``ERRATA_A76_1262888``: This applies errata 1262888 workaround to Cortex-A76 260 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 261 262- ``ERRATA_A76_1275112``: This applies errata 1275112 workaround to Cortex-A76 263 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 264 265- ``ERRATA_A76_1791580``: This applies errata 1791580 workaround to Cortex-A76 266 CPU. This needs to be enabled only for revision <= r4p0 of the CPU. 267 268- ``ERRATA_A76_1165522``: This applies errata 1165522 workaround to all 269 revisions of Cortex-A76 CPU. This errata is fixed in r3p0 but due to 270 limitation of errata framework this errata is applied to all revisions 271 of Cortex-A76 CPU. 272 273- ``ERRATA_A76_1868343``: This applies errata 1868343 workaround to Cortex-A76 274 CPU. This needs to be enabled only for revision <= r4p0 of the CPU. 275 276- ``ERRATA_A76_1946160``: This applies errata 1946160 workaround to Cortex-A76 277 CPU. This needs to be enabled only for revisions r3p0 - r4p1 of the CPU. 278 279- ``ERRATA_A76_2743102``: This applies errata 2743102 workaround to Cortex-A76 280 CPU. This needs to be enabled for all revisions <= r4p1 of the CPU and is 281 still open. 282 283For Cortex-A76AE, the following errata build flags are defined : 284 285- ``ERRATA_A76AE_1931427``: This applies errata 1931427 workaround to Cortex-A76AE 286 CPU. This needs to be enabled for revision r0p0 and r1p0 of the CPU and it is 287 fixed in r1p1. 288 289- ``ERRATA_A76AE_1931435``: This applies errata 1931435 workaround to Cortex-A76AE 290 CPU. This needs to be enabled for revision r0p0 and r1p0 of the CPU and it is 291 fixed in r1p1. 292 293- ``ERRATA_A76AE_1969401``: This applies errata 1969401 workaround to Cortex-A76AE 294 CPU. This needs to be enabled for revision r0p0 and r1p0 of the CPU and it is 295 fixed in r1p1. 296 297- ``ERRATA_A76AE_2371140``: This applies errata 2371140 workaround to Cortex-A76AE 298 CPU. This needs to be enabled for all revisions <= r1p1 of the CPU and is 299 still open. 300 301For Cortex-A77, the following errata build flags are defined : 302 303- ``ERRATA_A77_1508412``: This applies errata 1508412 workaround to Cortex-A77 304 CPU. This needs to be enabled only for revision <= r1p0 of the CPU. 305 306- ``ERRATA_A77_1925769``: This applies errata 1925769 workaround to Cortex-A77 307 CPU. This needs to be enabled only for revision <= r1p1 of the CPU. 308 309- ``ERRATA_A77_1946167``: This applies errata 1946167 workaround to Cortex-A77 310 CPU. This needs to be enabled only for revision <= r1p1 of the CPU. 311 312- ``ERRATA_A77_1791578``: This applies errata 1791578 workaround to Cortex-A77 313 CPU. This needs to be enabled for r0p0, r1p0, and r1p1, it is still open. 314 315- ``ERRATA_A77_2356587``: This applies errata 2356587 workaround to Cortex-A77 316 CPU. This needs to be enabled for r0p0, r1p0, and r1p1, it is still open. 317 318 - ``ERRATA_A77_1800714``: This applies errata 1800714 workaround to Cortex-A77 319 CPU. This needs to be enabled for revisions <= r1p1 of the CPU. 320 321 - ``ERRATA_A77_2743100``: This applies errata 2743100 workaround to Cortex-A77 322 CPU. This needs to be enabled for r0p0, r1p0, and r1p1, it is still open. 323 324For Cortex-A78, the following errata build flags are defined : 325 326- ``ERRATA_A78_1688305``: This applies errata 1688305 workaround to Cortex-A78 327 CPU. This needs to be enabled only for revision r0p0 - r1p0 of the CPU. 328 329- ``ERRATA_A78_1941498``: This applies errata 1941498 workaround to Cortex-A78 330 CPU. This needs to be enabled for revisions r0p0, r1p0, and r1p1 of the CPU. 331 332- ``ERRATA_A78_1951500``: This applies errata 1951500 workaround to Cortex-A78 333 CPU. This needs to be enabled for revisions r1p0 and r1p1, r0p0 has the same 334 issue but there is no workaround for that revision. 335 336- ``ERRATA_A78_1821534``: This applies errata 1821534 workaround to Cortex-A78 337 CPU. This needs to be enabled for revisions r0p0 and r1p0. 338 339- ``ERRATA_A78_1952683``: This applies errata 1952683 workaround to Cortex-A78 340 CPU. This needs to be enabled for revision r0p0, it is fixed in r1p0. 341 342- ``ERRATA_A78_2242635``: This applies errata 2242635 workaround to Cortex-A78 343 CPU. This needs to be enabled for revisions r1p0, r1p1, and r1p2. The issue 344 is present in r0p0 but there is no workaround. It is still open. 345 346- ``ERRATA_A78_2376745``: This applies errata 2376745 workaround to Cortex-A78 347 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1, and r1p2, and 348 it is still open. 349 350- ``ERRATA_A78_2395406``: This applies errata 2395406 workaround to Cortex-A78 351 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1, and r1p2, and 352 it is still open. 353 354- ``ERRATA_A78_2712571``: This applies erratum 2712571 workaround to Cortex-A78 355 CPU, this erratum affects system configurations that do not use an ARM 356 interconnect IP. This needs to be enabled for revisions r0p0, r1p0, r1p1 357 and r1p2 and it is still open. 358 359- ``ERRATA_A78_2742426``: This applies erratum 2742426 workaround to Cortex-A78 360 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1 and r1p2 and 361 it is still open. 362 363- ``ERRATA_A78_2772019``: This applies errata 2772019 workaround to Cortex-A78 364 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1, and r1p2, and 365 it is still open. 366 367- ``ERRATA_A78_2779479``: This applies erratum 2779479 workaround to Cortex-A78 368 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1 and r1p2 and 369 it is still open. 370 371For Cortex-A78AE, the following errata build flags are defined : 372 373- ``ERRATA_A78_AE_1941500`` : This applies errata 1941500 workaround to 374 Cortex-A78AE CPU. This needs to be enabled for revisions r0p0 and r0p1. 375 This erratum is still open. 376 377- ``ERRATA_A78_AE_1951502`` : This applies errata 1951502 workaround to 378 Cortex-A78AE CPU. This needs to be enabled for revisions r0p0 and r0p1. This 379 erratum is still open. 380 381- ``ERRATA_A78_AE_2376748`` : This applies errata 2376748 workaround to 382 Cortex-A78AE CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2. 383 This erratum is still open. 384 385- ``ERRATA_A78_AE_2395408`` : This applies errata 2395408 workaround to 386 Cortex-A78AE CPU. This needs to be enabled for revisions r0p0 and r0p1. This 387 erratum is still open. 388 389- ``ERRATA_A78_AE_2712574`` : This applies erratum 2712574 workaround to 390 Cortex-A78AE CPU. This erratum affects system configurations that do not use 391 an ARM interconnect IP. This needs to be enabled for revisions r0p0, r0p1 and 392 r0p2. This erratum is still open. 393 394For Cortex-A78C, the following errata build flags are defined : 395 396- ``ERRATA_A78C_1827430`` : This applies errata 1827430 workaround to 397 Cortex-A78C CPU. This needs to be enabled for revision r0p0. The erratum is 398 fixed in r0p1. 399 400- ``ERRATA_A78C_1827440`` : This applies errata 1827440 workaround to 401 Cortex-A78C CPU. This needs to be enabled for revision r0p0. The erratum is 402 fixed in r0p1. 403 404- ``ERRATA_A78C_2242638`` : This applies errata 2242638 workaround to 405 Cortex-A78C CPU. This needs to be enabled for revisions r0p1, r0p2 and 406 it is still open. 407 408- ``ERRATA_A78C_2376749`` : This applies errata 2376749 workaround to 409 Cortex-A78C CPU. This needs to be enabled for revisions r0p1 and r0p2. This 410 erratum is still open. 411 412- ``ERRATA_A78C_2395411`` : This applies errata 2395411 workaround to 413 Cortex-A78C CPU. This needs to be enabled for revisions r0p1 and r0p2. This 414 erratum is still open. 415 416- ``ERRATA_A78C_2683027`` : This applies errata 2683027 workaround to 417 Cortex-A78C CPU. This needs to be enabled for revisions r0p1 and r0p2. This 418 erratum is still open. 419 420- ``ERRATA_A78C_2712575`` : This applies erratum 2712575 workaround to 421 Cortex-A78C CPU, this erratum affects system configurations that do not use 422 an ARM interconnect IP. This needs to be enabled for revisions r0p1 and r0p2 423 and is still open. 424 425- ``ERRATA_A78C_2743232`` : This applies erratum 2743232 workaround to 426 Cortex-A78C CPU. This needs to be enabled for revisions r0p1 and r0p2. 427 This erratum is still open. 428 429- ``ERRATA_A78C_2772121`` : This applies errata 2772121 workaround to 430 Cortex-A78C CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2. 431 This erratum is still open. 432 433- ``ERRATA_A78C_2779484`` : This applies errata 2779484 workaround to 434 Cortex-A78C CPU. This needs to be enabled for revisions r0p1 and r0p2. 435 This erratum is still open. 436 437For Cortex-X1 CPU, the following errata build flags are defined: 438 439- ``ERRATA_X1_1821534`` : This applies errata 1821534 workaround to Cortex-X1 440 CPU. This needs to be enabled only for revision <= r1p0 of the CPU. 441 442- ``ERRATA_X1_1688305`` : This applies errata 1688305 workaround to Cortex-X1 443 CPU. This needs to be enabled only for revision <= r1p0 of the CPU. 444 445- ``ERRATA_X1_1827429`` : This applies errata 1827429 workaround to Cortex-X1 446 CPU. This needs to be enabled only for revision <= r1p0 of the CPU. 447 448For Neoverse N1, the following errata build flags are defined : 449 450- ``ERRATA_N1_1073348``: This applies errata 1073348 workaround to Neoverse-N1 451 CPU. This needs to be enabled only for revision r0p0 and r1p0 of the CPU. 452 453- ``ERRATA_N1_1130799``: This applies errata 1130799 workaround to Neoverse-N1 454 CPU. This needs to be enabled only for revision <= r2p0 of the CPU. 455 456- ``ERRATA_N1_1165347``: This applies errata 1165347 workaround to Neoverse-N1 457 CPU. This needs to be enabled only for revision <= r2p0 of the CPU. 458 459- ``ERRATA_N1_1207823``: This applies errata 1207823 workaround to Neoverse-N1 460 CPU. This needs to be enabled only for revision <= r2p0 of the CPU. 461 462- ``ERRATA_N1_1220197``: This applies errata 1220197 workaround to Neoverse-N1 463 CPU. This needs to be enabled only for revision <= r2p0 of the CPU. 464 465- ``ERRATA_N1_1257314``: This applies errata 1257314 workaround to Neoverse-N1 466 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 467 468- ``ERRATA_N1_1262606``: This applies errata 1262606 workaround to Neoverse-N1 469 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 470 471- ``ERRATA_N1_1262888``: This applies errata 1262888 workaround to Neoverse-N1 472 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 473 474- ``ERRATA_N1_1275112``: This applies errata 1275112 workaround to Neoverse-N1 475 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 476 477- ``ERRATA_N1_1315703``: This applies errata 1315703 workaround to Neoverse-N1 478 CPU. This needs to be enabled only for revision <= r3p0 of the CPU. 479 480- ``ERRATA_N1_1542419``: This applies errata 1542419 workaround to Neoverse-N1 481 CPU. This needs to be enabled only for revisions r3p0 - r4p0 of the CPU. 482 483- ``ERRATA_N1_1868343``: This applies errata 1868343 workaround to Neoverse-N1 484 CPU. This needs to be enabled only for revision <= r4p0 of the CPU. 485 486- ``ERRATA_N1_1946160``: This applies errata 1946160 workaround to Neoverse-N1 487 CPU. This needs to be enabled for revisions r3p0, r3p1, r4p0, and r4p1, for 488 revisions r0p0, r1p0, and r2p0 there is no workaround. 489 490- ``ERRATA_N1_2743102``: This applies errata 2743102 workaround to Neoverse-N1 491 CPU. This needs to be enabled for all revisions <= r4p1 of the CPU and is 492 still open. 493 494For Neoverse V1, the following errata build flags are defined : 495 496- ``ERRATA_V1_1618635``: This applies errata 1618635 workaround to Neoverse-V1 497 CPU. This needs to be enabled for revision r0p0 of the CPU, it is fixed in 498 r1p0. 499 500- ``ERRATA_V1_1774420``: This applies errata 1774420 workaround to Neoverse-V1 501 CPU. This needs to be enabled only for revisions r0p0 and r1p0, it is fixed 502 in r1p1. 503 504- ``ERRATA_V1_1791573``: This applies errata 1791573 workaround to Neoverse-V1 505 CPU. This needs to be enabled only for revisions r0p0 and r1p0, it is fixed 506 in r1p1. 507 508- ``ERRATA_V1_1852267``: This applies errata 1852267 workaround to Neoverse-V1 509 CPU. This needs to be enabled only for revisions r0p0 and r1p0, it is fixed 510 in r1p1. 511 512- ``ERRATA_V1_1925756``: This applies errata 1925756 workaround to Neoverse-V1 513 CPU. This needs to be enabled for r0p0, r1p0, and r1p1, it is still open. 514 515- ``ERRATA_V1_1940577``: This applies errata 1940577 workaround to Neoverse-V1 516 CPU. This needs to be enabled only for revision r1p0 and r1p1 of the 517 CPU. 518 519- ``ERRATA_V1_1966096``: This applies errata 1966096 workaround to Neoverse-V1 520 CPU. This needs to be enabled for revisions r1p0 and r1p1 of the CPU, the 521 issue is present in r0p0 as well but there is no workaround for that 522 revision. It is still open. 523 524- ``ERRATA_V1_2139242``: This applies errata 2139242 workaround to Neoverse-V1 525 CPU. This needs to be enabled for revisions r0p0, r1p0, and r1p1 of the 526 CPU. It is still open. 527 528- ``ERRATA_V1_2216392``: This applies errata 2216392 workaround to Neoverse-V1 529 CPU. This needs to be enabled for revisions r1p0 and r1p1 of the CPU, the 530 issue is present in r0p0 as well but there is no workaround for that 531 revision. It is still open. 532 533- ``ERRATA_V1_2294912``: This applies errata 2294912 workaround to Neoverse-V1 534 CPU. This needs to be enabled for revisions r0p0, r1p0, and r1p1 and r1p2 of 535 the CPU. 536 537- ``ERRATA_V1_2348377``: This applies errata 2348377 workaroud to Neoverse-V1 538 CPU. This needs to be enabled for revisions r0p0, r1p0 and r1p1 of the CPU. 539 It has been fixed in r1p2. 540 541- ``ERRATA_V1_2372203``: This applies errata 2372203 workaround to Neoverse-V1 542 CPU. This needs to be enabled for revisions r0p0, r1p0 and r1p1 of the CPU. 543 It is still open. 544 545- ``ERRATA_V1_2701953``: This applies erratum 2701953 workaround to Neoverse-V1 546 CPU, this erratum affects system configurations that do not use an ARM 547 interconnect IP. This needs to be enabled for revisions r0p0, r1p0 and r1p1. 548 It has been fixed in r1p2. 549 550- ``ERRATA_V1_2743093``: This applies errata 2743093 workaround to Neoverse-V1 551 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1 and r1p2 of the 552 CPU. It is still open. 553 554- ``ERRATA_V1_2743233``: This applies erratum 2743233 workaround to Neoverse-V1 555 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1, and r1p2 of the 556 CPU. It is still open. 557 558- ``ERRATA_V1_2779461``: This applies erratum 2779461 workaround to Neoverse-V1 559 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1, r1p2 of the 560 CPU. It is still open. 561 562For Neoverse V2, the following errata build flags are defined : 563 564- ``ERRATA_V2_2618597``: This applies errata 2618597 workaround to Neoverse-V2 565 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in 566 r0p2. 567 568- ``ERRATA_V2_2662553``: This applies errata 2662553 workaround to Neoverse-V2 569 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in 570 r0p2. 571 572- ``ERRATA_V2_2719103``: This applies errata 2719103 workaround to Neoverse-V2 573 CPU, this affects system configurations that do not use and ARM interconnect 574 IP. This needs to be enabled for revisions r0p0 and r0p1. It has been fixed 575 in r0p2. 576 577- ``ERRATA_V2_2719105``: This applies errata 2719105 workaround to Neoverse-V2 578 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in 579 r0p2. 580 581- ``ERRATA_V2_2743011``: This applies errata 2743011 workaround to Neoverse-V2 582 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in 583 r0p2. 584 585- ``ERRATA_V2_2779510``: This applies errata 2779510 workaround to Neoverse-V2 586 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in 587 r0p2. 588 589- ``ERRATA_V2_2801372``: This applies errata 2801372 workaround to Neoverse-V2 590 CPU, this affects all configurations. This needs to be enabled for revisions 591 r0p0 and r0p1. It has been fixed in r0p2. 592 593- ``ERRATA_V2_3701771``: This applies errata 3701771 workaround to Neoverse-V2 594 CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2 and is 595 still open. 596 597- ``ERRATA_V2_3841324``: This applies errata 3841324 workaround to Neoverse-V2 598 CPU. This needs to be enabled only for revisions r0p0 and r0p1 of 599 the CPU. It is fixed in r0p2. 600 601For Neoverse V3, the following errata build flags are defined : 602 603- ``ERRATA_V3_2970647``: This applies errata 2970647 workaround to Neoverse-V3 604 CPU. This needs to be enabled for revision r0p0. It is fixed in r0p1. 605 606- ``ERRATA_V3_3696307``: This applies errata 3696307 workaround to Neoverse-V3 607 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in 608 r0p2. 609 610- ``ERRATA_V3_3701767``: This applies errata 3701767 workaround to Neoverse-V3 611 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2 of the CPU and 612 is still open. 613 614- ``ERRATA_V3_3734562``: This applies errata 3734562 workaround to Neoverse-V3 615 CPU. This needs to be enabled for revisions r0p0 and r0p1 of the CPU and 616 is fixed in r0p2. 617 618- ``ERRATA_V3_3782181``: This applies errata 3782181 workaround to Neoverse-V3 619 CPU. This needs to be enabled for revision r0p1 of the CPU and is fixed in 620 r0p2. 621 622For Cortex-A710, the following errata build flags are defined : 623 624- ``ERRATA_A710_1901946``: This applies errata 1901946 workaround to 625 Cortex-A710 CPU. This needs to be enabled only for revision r1p0. It has 626 been fixed in r2p0. 627 628- ``ERRATA_A710_1916945``: This applies errata 1916945 workaround to 629 Cortex-A710 CPU. This needs to be enabled only for revisions r0p0 and r1p0. 630 It has been fixed in r2p0. 631 632- ``ERRATA_A710_1917258``: This applies errata 1917258 workaround to 633 Cortex-A710 CPU. This needs to be enabled only for revisions r0p0 and r1p0. 634 It has been fixed in r2p0. 635 636- ``ERRATA_A710_1927200``: This applies errata 1927200 workaround to 637 Cortex-A710 CPU. This needs to be enabled only for revisions r0p0 and r1p0. 638 It has been fixed in r2p0. 639 640- ``ERRATA_A710_1987031``: This applies errata 1987031 workaround to 641 Cortex-A710 CPU. This needs to be enabled only for revisions r0p0, r1p0 and 642 r2p0 of the CPU. It is still open. 643 644- ``ERRATA_A710_2081180``: This applies errata 2081180 workaround to 645 Cortex-A710 CPU. This needs to be enabled only for revisions r0p0, r1p0 and 646 r2p0 of the CPU. It is still open. 647 648- ``ERRATA_A710_2055002``: This applies errata 2055002 workaround to 649 Cortex-A710 CPU. This needs to be enabled for revisions r1p0, r2p0 of the CPU 650 and is still open. 651 652- ``ERRATA_A710_2017096``: This applies errata 2017096 workaround to 653 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 654 of the CPU and is still open. 655 656- ``ERRATA_A710_2083908``: This applies errata 2083908 workaround to 657 Cortex-A710 CPU. This needs to be enabled for revision r2p0 of the CPU and 658 is still open. 659 660- ``ERRATA_A710_2267065``: This applies errata 2267065 workaround to 661 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 662 of the CPU and is fixed in r2p1. 663 664- ``ERRATA_A710_2136059``: This applies errata 2136059 workaround to 665 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 666 of the CPU and is fixed in r2p1. 667 668- ``ERRATA_A710_2147715``: This applies errata 2147715 workaround to 669 Cortex-A710 CPU. This needs to be enabled for revision r2p0 of the CPU 670 and is fixed in r2p1. 671 672- ``ERRATA_A710_2216384``: This applies errata 2216384 workaround to 673 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 674 of the CPU and is fixed in r2p1. 675 676- ``ERRATA_A710_2282622``: This applies errata 2282622 workaround to 677 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and 678 r2p1 of the CPU and is still open. 679 680- ``ERRATA_A710_2291219``: This applies errata 2291219 workaround to 681 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 682 of the CPU and is fixed in r2p1. 683 684- ``ERRATA_A710_2008768``: This applies errata 2008768 workaround to 685 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 686 of the CPU and is fixed in r2p1. 687 688- ``ERRATA_A710_2371105``: This applies errata 2371105 workaround to 689 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 690 of the CPU and is fixed in r2p1. 691 692- ``ERRATA_A710_2701952``: This applies erratum 2701952 workaround to Cortex-A710 693 CPU, and applies to system configurations that do not use and ARM 694 interconnect IP. This needs to be enabled for r0p0, r1p0, r2p0 and r2p1 and 695 is still open. 696 697- ``ERRATA_A710_2742423``: This applies errata 2742423 workaround to 698 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and 699 r2p1 of the CPU and is still open. 700 701- ``ERRATA_A710_2768515``: This applies errata 2768515 workaround to 702 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and 703 r2p1 of the CPU and is still open. 704 705- ``ERRATA_A710_2778471``: This applies errata 2778471 workaround to Cortex-A710 706 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the 707 CPU and is still open. 708 709- ``ERRATA_A710_3324338``: This applies errata 3324338 workaround to 710 Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and 711 r2p1 of the CPU and is still open. 712 713- ``ERRATA_A710_3701772``: This applies errata 3701772 workaround to Cortex-A710 714 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0, r2p1 of the 715 CPU and is still open. 716 717For Neoverse N2, the following errata build flags are defined : 718 719- ``ERRATA_N2_2002655``: This applies errata 2002655 workaround to Neoverse-N2 720 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 721 722- ``ERRATA_N2_2009478``: This applies errata 2009478 workaround to Neoverse-N2 723 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 724 725- ``ERRATA_N2_2067956``: This applies errata 2067956 workaround to Neoverse-N2 726 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 727 728- ``ERRATA_N2_2025414``: This applies errata 2025414 workaround to Neoverse-N2 729 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 730 731- ``ERRATA_N2_2189731``: This applies errata 2189731 workaround to Neoverse-N2 732 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 733 734- ``ERRATA_N2_2138956``: This applies errata 2138956 workaround to Neoverse-N2 735 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 736 737- ``ERRATA_N2_2242415``: This applies errata 2242415 workaround to Neoverse-N2 738 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 739 740- ``ERRATA_N2_2138958``: This applies errata 2138958 workaround to Neoverse-N2 741 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 742 743- ``ERRATA_N2_2242400``: This applies errata 2242400 workaround to Neoverse-N2 744 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 745 746- ``ERRATA_N2_2280757``: This applies errata 2280757 workaround to Neoverse-N2 747 CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1. 748 749- ``ERRATA_N2_2326639``: This applies errata 2326639 workaround to Neoverse-N2 750 CPU. This needs to be enabled for revision r0p0 of the CPU, it is fixed in 751 r0p1. 752 753- ``ERRATA_N2_2340933``: This applies errata 2340933 workaround to Neoverse-N2 754 CPU. This needs to be enabled for revision r0p0 of the CPU, it is fixed in 755 r0p1. 756 757- ``ERRATA_N2_2346952``: This applies errata 2346952 workaround to Neoverse-N2 758 CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2 of the CPU, 759 it is fixed in r0p3. 760 761- ``ERRATA_N2_2376738``: This applies errata 2376738 workaround to Neoverse-N2 762 CPU. This needs to be enabled for revision r0p0, r0p1, r0p2, r0p3 and is still open. 763 764- ``ERRATA_N2_2388450``: This applies errata 2388450 workaround to Neoverse-N2 765 CPU. This needs to be enabled for revision r0p0 of the CPU, it is fixed in 766 r0p1. 767 768- ``ERRATA_N2_2743014``: This applies errata 2743014 workaround to Neoverse-N2 769 CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2. It is fixed 770 in r0p3. 771 772- ``ERRATA_N2_2743089``: This applies errata 2743089 workaround to Neoverse-N2 773 CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2. It is fixed 774 in r0p3. 775 776- ``ERRATA_N2_2728475``: This applies erratum 2728475 workaround to Neoverse-N2 777 CPU, this erratum affects system configurations that do not use and ARM 778 interconnect IP. This needs to be enabled for revisions r0p0, r0p1 and r0p2. 779 It is fixed in r0p3. 780 781- ``ERRATA_N2_2779511``: This applies errata 2779511 workaround to Neoverse-N2 782 CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2. It is fixed 783 in r0p3. 784 785- ``ERRATA_N2_3701773``: This applies errata 3701773 workaround to Neoverse-N2 786 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2, r0p3 and is 787 still open. 788 789For Neoverse N3, the following errata build flags are defined : 790 791- ``ERRATA_N3_3699563``: This applies errata 3699563 workaround to Neoverse-N3 792 CPU. This needs to be enabled for revisions r0p0 and is still open. 793 794For Cortex-X2, the following errata build flags are defined : 795 796- ``ERRATA_X2_1901946``: This applies errata 1901946 workaround to Cortex-X2 797 CPU. This needs to be enabled only for r1p0, it is fixed in r2p0. 798 799- ``ERRATA_X2_1916945``: This applies errata 1916945 workaround to Cortex-X2 800 CPU. This needs to be enabled only for revisions r0p0 and r1p0 of the CPU, it 801 is fixed in r2p0. 802 803- ``ERRATA_X2_1917258``: This applies errata 1917258 workaround to Cortex-X2 804 CPU. This needs to be enabled only for revisions r0p0 and r1p0 of the CPU, it 805 is fixed in r2p0. 806 807- ``ERRATA_X2_1927200``: This applies errata 1927200 workaround to Cortex-X2 808 CPU. This needs to be enabled only for revisions r0p0 and r1p0 of the CPU, it 809 is fixed in r2p0. 810 811- ``ERRATA_X2_1934260``: This applies errata 1934260 workaround to Cortex-X2 812 CPU. This needs to be enabled only for revision r1p0 of the CPU, it is fixed 813 in r2p0. 814 815- ``ERRATA_X2_2002765``: This applies errata 2002765 workaround to Cortex-X2 816 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 817 CPU, it is fixed in r2p1. 818 819- ``ERRATA_X2_2017096``: This applies errata 2017096 workaround to Cortex-X2 820 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 821 CPU, it is fixed in r2p1. 822 823- ``ERRATA_X2_2081180``: This applies errata 2081180 workaround to Cortex-X2 824 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 825 CPU, it is fixed in r2p1. 826 827- ``ERRATA_X2_2083908``: This applies errata 2083908 workaround to Cortex-X2 828 CPU. This needs to be enabled only for revision r2p0 of the CPU, it is fixed 829 in r2p1. 830 831- ``ERRATA_X2_2136059``: This applies errata 2136059 workaround to Cortex-X2 832 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 833 CPU, it is fixed in r2p1. 834 835- ``ERRATA_X2_2147715``: This applies errata 2147715 workaround to Cortex-X2 836 CPU. This needs to be enabled only for revision r2p0 of the CPU, it is fixed 837 in r2p1. 838 839- ``ERRATA_X2_2216384``: This applies errata 2216384 workaround to Cortex-X2 840 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 841 CPU, it is fixed in r2p1. 842 843- ``ERRATA_X2_2267065``: This applies errata 2267065 workaround to Cortex-X2 844 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 845 CPU, it is fixed in r2p1. 846 847- ``ERRATA_X2_2282622``: This applies errata 2282622 workaround to Cortex-X2 848 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the 849 CPU and is still open. 850 851- ``ERRATA_X2_2291219``: This applies errata 2291219 workaround to Cortex-X2 852 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 853 CPU, it is fixed in r2p1. 854 855- ``ERRATA_X2_2371105``: This applies errata 2371105 workaround to Cortex-X2 856 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r2p0 of the 857 CPU, it is fixed in r2p1. 858 859- ``ERRATA_X2_2701952``: This applies errata 2701952 workaround to Cortex-X2 860 CPU and affects system configurations that do not use an Arm interconnect IP. 861 This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 and is 862 still open. 863 864- ``ERRATA_X2_2742423``: This applies errata 2742423 workaround to Cortex-X2 865 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the 866 CPU and is still open. 867 868- ``ERRATA_X2_2768515``: This applies errata 2768515 workaround to Cortex-X2 869 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the 870 CPU and is still open. 871 872- ``ERRATA_X2_2778471``: This applies errata 2778471 workaround to Cortex-X2 873 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the 874 CPU and is still open. 875 876- ``ERRATA_X2_3324338``: This applies errata 3324338 workaround to Cortex-X2 877 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the 878 CPU and is still open. 879 880- ``ERRATA_X2_3701772``: This applies errata 3701772 workaround to Cortex-X2 881 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the 882 CPU and is still open. 883 884For Cortex-X3, the following errata build flags are defined : 885 886- ``ERRATA_X3_2266875``: This applies errata 2266875 workaround to the Cortex-X3 887 CPU. This needs to be enabled only for revisions r0p0 and r1p0 of the CPU, it 888 is fixed in r1p1. 889 890- ``ERRATA_X3_2302506``: This applies errata 2302506 workaround to the Cortex-X3 891 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r1p1, it is 892 fixed in r1p2. 893 894- ``ERRATA_X3_2313909``: This applies errata 2313909 workaround to 895 Cortex-X3 CPU. This needs to be enabled only for revisions r0p0 and r1p0 896 of the CPU, it is fixed in r1p1. 897 898- ``ERRATA_X3_2372204``: This applies errata 2372204 workaround to 899 Cortex-X3 CPU. This needs to be enabled only for revisions r0p0 and r1p0 900 of the CPU, it is fixed in r1p1. 901 902- ``ERRATA_X3_2615812``: This applies errata 2615812 workaround to Cortex-X3 903 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r1p1 of the 904 CPU, it is fixed in r1p2. 905 906- ``ERRATA_X3_2641945``: This applies errata 2641945 workaround to Cortex-X3 907 CPU. This needs to be enabled only for revisions r0p0 and r1p0 of the CPU. 908 It is fixed in r1p1. 909 910- ``ERRATA_X3_2701951``: This applies erratum 2701951 workaround to Cortex-X3 911 CPU and affects system configurations that do not use an ARM interconnect 912 IP. This needs to be applied to revisions r0p0, r1p0 and r1p1. It is fixed 913 in r1p2. 914 915- ``ERRATA_X3_2742421``: This applies errata 2742421 workaround to 916 Cortex-X3 CPU. This needs to be enabled only for revisions r0p0, r1p0 and 917 r1p1. It is fixed in r1p2. 918 919- ``ERRATA_X3_2743088``: This applies errata 2743088 workaround to Cortex-X3 920 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r1p1. It is 921 fixed in r1p2. 922 923- ``ERRATA_X3_2779509``: This applies errata 2779509 workaround to Cortex-X3 924 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r1p1 of the 925 CPU. It is fixed in r1p2. 926 927- ``ERRATA_X3_3213672``: This applies errata 3213672 workaround to Cortex-X3 928 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1 and r1p2 929 of the CPU. It is still open. 930 931- ``ERRATA_X3_3692984``: This applies errata 3692984 workaround to Cortex-X3 932 CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1 and r1p2 933 of the CPU. It is still open. 934 935- ``ERRATA_X3_3701769``: This applies errata 3701769 workaround to Cortex-X3 936 CPU. This needs to be enabled only for revisions r0p0, r1p0, r1p1 and r1p2 937 of the CPU and it is still open. 938 939- ``ERRATA_X3_3827463``: This applies errata 3827463 workaround to Cortex-X3 940 CPU. This needs to be enabled only for revisions r0p0, r1p0 and r1p1 of 941 the CPU. It is fixed in r1p2. 942 943For Cortex-X4, the following errata build flags are defined : 944 945- ``ERRATA_X4_2701112``: This applies erratum 2701112 workaround to Cortex-X4 946 CPU and affects system configurations that do not use an Arm interconnect IP. 947 This needs to be enabled for revisions r0p0 and is fixed in r0p1. 948 The workaround for this erratum is not implemented in EL3, but the flag can 949 be enabled/disabled at the platform level. The flag is used when the errata ABI 950 feature is enabled and can assist the Kernel in the process of 951 mitigation of the erratum. 952 953- ``ERRATA_X4_2726228``: This applies erratum 2726228 workaround to Cortex-X4 954 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in 955 r0p2. 956 957- ``ERRATA_X4_2740089``: This applies errata 2740089 workaround to Cortex-X4 958 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed 959 in r0p2. 960 961- ``ERRATA_X4_2763018``: This applies errata 2763018 workaround to Cortex-X4 962 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in r0p2. 963 964- ``ERRATA_X4_2816013``: This applies errata 2816013 workaround to Cortex-X4 965 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in r0p2. 966 967- ``ERRATA_X4_2897503``: This applies errata 2897503 workaround to Cortex-X4 968 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in r0p2. 969 970- ``ERRATA_X4_2923985``: This applies errata 2923985 workaround to Cortex-X4 971 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in r0p2. 972 973- ``ERRATA_X4_2957258``: This applies errata 2957258 workaround to Cortex-X4 974 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in r0p2. 975 976- ``ERRATA_X4_3076789``: This applies errata 3076789 workaround to Cortex-X4 977 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is fixed in r0p2. 978 979- ``ERRATA_X4_3133195``: This applies errata 3133195 workaround to Cortex-X4 980 CPU. This needs to be enabled for revision r0p2. It is fixed in r0p3. 981 982- ``ERRATA_X4_3701758``: This applies errata 3701758 workaround to Cortex-X4 983 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2 and r0p3. 984 It is still open. 985 986- ``ERRATA_X4_3887999``: This applies errata 3887999 workaround to Cortex-X4 987 CPU. This needs to be enabled for revision r0p0, r0p1, r0p2 and r0p3. 988 It is still open. 989 990For Cortex-X925, the following errata build flags are defined : 991 992- ``ERRATA_X925_2963999``: This applies errata 2963999 workaround to Cortex-X925 993 CPU. This needs to be enabled for revision r0p0. It is fixed in r0p1. 994 995- ``ERRATA_X925_3701747``: This applies errata 3701747 workaround to Cortex-X925 996 CPU. This needs to be enabled for revisions r0p0 and r0p1. It is still open. 997 998For Cortex-A510, the following errata build flags are defined : 999 1000- ``ERRATA_A510_2008766``: This applies errata 2008766 workaround to 1001 Cortex-A510 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2, 1002 r0p3, r1p0, r1p1, r1p2 and r1p3. It is still open. 1003 1004- ``ERRATA_A510_2288014``: This applies errata 2288014 workaround to 1005 Cortex-A510 CPU. This needs to be enabled only for revisions r0p0, r0p1, 1006 r0p2, r0p3 and r1p0, it is fixed in r1p1. 1007 1008- ``ERRATA_A510_2042739``: This applies errata 2042739 workaround to 1009 Cortex-A510 CPU. This needs to be enabled only for revisions r0p0, r0p1 and 1010 r0p2, it is fixed in r0p3. 1011 1012- ``ERRATA_A510_2041909``: This applies errata 2041909 workaround to 1013 Cortex-A510 CPU. This needs to be enabled only for revision r0p2 and is fixed 1014 in r0p3. The issue is also present in r0p0 and r0p1 but there is no 1015 workaround for those revisions. 1016 1017- ``ERRATA_A510_2080326``: This applies errata 2080326 workaround to 1018 Cortex-A510 CPU. This needs to be enabled only for revision r0p2 and is 1019 fixed in r0p3. This issue is also present in r0p0 and r0p1 but there is no 1020 workaround for those revisions. 1021 1022- ``ERRATA_A510_2169012``: This applies errata 2169012 workaround to 1023 Cortex-A510 CPU. This needs to be enabled only for revisions r0p0, r0p1, 1024 r0p2, r0p3 and r1p0, it is fixed in r1p1. 1025 1026- ``ERRATA_A510_2218134``: This applies errata 2218134 workaround to 1027 Cortex-A510 CPU. This needs to be enabled only for revision r1p0 and is fixed 1028 in r1p1. 1029 1030- ``ERRATA_A510_2250311``: This applies errata 2250311 workaround to 1031 Cortex-A510 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2, 1032 r0p3 and r1p0, it is fixed in r1p1. This workaround disables MPMM even if 1033 ENABLE_MPMM=1. 1034 1035- ``ERRATA_A510_2218950``: This applies errata 2218950 workaround to 1036 Cortex-A510 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2, 1037 r0p3 and r1p0, it is fixed in r1p1. 1038 1039- ``ERRATA_A510_2172148``: This applies errata 2172148 workaround to 1040 Cortex-A510 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2, 1041 r0p3 and r1p0, it is fixed in r1p1. 1042 1043- ``ERRATA_A510_2347730``: This applies errata 2347730 workaround to 1044 Cortex-A510 CPU. This needs to be enabled for revisions r0p0, r0p1, r0p2, 1045 r0p3, r1p0 and r1p1. It is fixed in r1p2. 1046 1047- ``ERRATA_A510_2371937``: This applies errata 2371937 workaround to 1048 Cortex-A510 CPU. This needs to applied for revisions r0p0, r0p1, r0p2, 1049 r0p3, r1p0, r1p1, and is fixed in r1p2. 1050 1051- ``ERRATA_A510_2420992``: This applies errata 2420992 workaround to 1052 Cortex-A510 CPU. This needs to applied for revisions r1p0 and r1p1, and is 1053 fixed in r1p2. 1054 1055- ``ERRATA_A510_2666669``: This applies errata 2666669 workaround to 1056 Cortex-A510 CPU. This needs to applied for revisions r0p0, r0p1, r0p2, 1057 r0p3, r1p0, r1p1. It is fixed in r1p2. 1058 1059- ``ERRATA_A510_2684597``: This applies erratum 2684597 workaround to 1060 Cortex-A510 CPU. This needs to be applied to revision r0p0, r0p1, r0p2, 1061 r0p3, r1p0, r1p1 and r1p2. It is fixed in r1p3. 1062 1063- ``ERRATA_A510_2971420``: This applies erratum 2971420 workaround to 1064 Cortex-A510 CPU. This needs to be applied to revisions r0p1, r0p2, r0p3, 1065 r1p0, r1p1, r1p2 and r1p3 and is still open. 1066 1067- ``ERRATA_A510_3672349``: This applies erratum 3672349 workaround to 1068 Cortex-A510 CPU. This needs to be applied to revisions r0p1, r0p2, r0p3, 1069 r1p0, r1p1, r1p2 and r1p3 and is still open. 1070 1071- ``ERRATA_A510_3704847``: This applies erratum 3704847 workaround to 1072 Cortex-A510 CPU. This needs to be applied to revisions r0p1, r0p2, r0p3, 1073 r1p0, r1p1, r1p2 and r1p3 and is still open. 1074 1075For Cortex-A520, the following errata build flags are defined : 1076 1077- ``ERRATA_A520_2630792``: This applies errata 2630792 workaround to 1078 Cortex-A520 CPU. This needs to applied for revisions r0p0, r0p1 of the 1079 CPU and is still open. 1080 1081- ``ERRATA_A520_2858100``: This applies errata 2858100 workaround to 1082 Cortex-A520 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1083 It is still open. 1084 1085- ``ERRATA_A520_2938996``: This applies errata 2938996 workaround to 1086 Cortex-A520 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1087 It is fixed in r0p2. 1088 1089For Cortex-A715, the following errata build flags are defined : 1090 1091- ``ERRATA_A715_2331818``: This applies errata 2331818 workaround to 1092 Cortex-A715 CPU. This needs to be enabled for revisions r0p0 and r1p0. 1093 It is fixed in r1p1. 1094 1095- ``ERRATA_A715_2344187``: This applies errata 2344187 workaround to 1096 Cortex-A715 CPU. This needs to be enabled for revisions r0p0 and r1p0. It is 1097 fixed in r1p1. 1098 1099- ``ERRATA_A715_2376701``: This applies errata 2376701 workaround to 1100 Cortex-A715 CPU. This needs to be enabled for revisions r0p0 and r1p0. It is 1101 fixed in r1p1. 1102 1103- ``ERRATA_A715_2409570``: This applies errata 2409570 workaround to 1104 Cortex-A715 CPU. This needs to be enabled only for revision r1p0. 1105 It is fixed in r1p1. This errata also applies to r0p0 but that revision has a 1106 different workaround, and since r0p0 is not used in production hardware it is 1107 not implemented. 1108 1109- ``ERRATA_A715_2413290``: This applies errata 2413290 workaround to 1110 Cortex-A715 CPU. This needs to be enabled only for revision r1p0 and 1111 when SPE(Statistical profiling extension)=True. The errata is fixed 1112 in r1p1. 1113 1114- ``ERRATA_A715_2420947``: This applies errata 2420947 workaround to 1115 Cortex-A715 CPU. This needs to be enabled only for revision r1p0. 1116 It is fixed in r1p1. 1117 1118- ``ERRATA_A715_2429384``: This applies errata 2429384 workaround to 1119 Cortex-A715 CPU. This needs to be enabled for revision r1p0. There is no 1120 workaround for revision r0p0. It is fixed in r1p1. 1121 1122- ``ERRATA_A715_2561034``: This applies errata 2561034 workaround to 1123 Cortex-A715 CPU. This needs to be enabled only for revision r1p0. 1124 It is fixed in r1p1. 1125 1126- ``ERRATA_A715_2728106``: This applies errata 2728106 workaround to 1127 Cortex-A715 CPU. This needs to be enabled for revisions r0p0, r1p0 1128 and r1p1. It is fixed in r1p2. 1129 1130- ``ERRATA_A715_2804830``: This applies errata 2804830 workaround to 1131 Cortex-A715 CPU. This needs to be enabled for revisions r0p0, r1p0, 1132 r1p1 and r1p2. It is fixed in r1p3. 1133 1134- ``ERRATA_A715_3456084``: This applies errata 3456084 workaround to 1135 Cortex-A715 CPU. This needs to be enabled for revisions r0p0, r1p0, 1136 r1p1, r1p2 and r1p3. It is still open. 1137 1138- ``ERRATA_A715_3699560``: This applies errata 3699560 workaround to 1139 Cortex-A715 CPU. This needs to be enabled for revisions r0p0, r1p0, 1140 r1p2 and r1p3. It is still open. 1141 1142- ``ERRATA_A715_3711916``: This applies errata 3711916 workaround to 1143 Cortex-A715 CPU. This needs to be enabled for revisions r0p0, r1p0, 1144 r1p1, r1p2 and r1p3. It is still open. 1145 1146For Cortex-A720, the following errata build flags are defined : 1147 1148- ``ERRATA_A720_2729604``: This applies errata 2729604 workaround to 1149 Cortex-A720 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1150 It is fixed in r0p2. 1151 1152- ``ERRATA_A720_2792132``: This applies errata 2792132 workaround to 1153 Cortex-A720 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1154 It is fixed in r0p2. 1155 1156- ``ERRATA_A720_2844092``: This applies errata 2844092 workaround to 1157 Cortex-A720 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1158 It is fixed in r0p2. 1159 1160- ``ERRATA_A720_2926083``: This applies errata 2926083 workaround to 1161 Cortex-A720 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1162 It is fixed in r0p2. 1163 1164- ``ERRATA_A720_2940794``: This applies errata 2940794 workaround to 1165 Cortex-A720 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1166 It is fixed in r0p2. 1167 1168- ``ERRATA_A720_3456091``: This applies errata 3456091 workaround to 1169 Cortex-A720 CPU. This needs to be enabled for revisions r0p0, r0p1 1170 and r0p2. It is still open. 1171 1172- ``ERRATA_A720_3699561``: This applies errata 3699561 workaround to 1173 Cortex-A720 CPU. This needs to be enabled for revisions r0p0, r0p1 1174 and r0p2. It is still open. 1175 1176- ``ERRATA_A720_3711910``: This applies errata 3711910 workaround to 1177 Cortex-A720 CPU. This needs to be enabled for revisions r0p0, r0p1 1178 and r0p2. It is still open. 1179 1180For Cortex-A720_AE, the following errata build flags are defined : 1181 1182- ``ERRATA_A720_AE_3456103``: This applies errata 3456103 workaround to 1183 Cortex-A720_AE CPU. This needs to be enabled for revisions r0p0 and r0p1. It 1184 is still open. 1185 1186- ``ERRATA_A720_AE_3699562``: This applies errata 3699562 workaround 1187 to Cortex-A720_AE CPU. This needs to be enabled for revisions r0p0. 1188 It is still open. 1189 1190For Cortex-A725, the following errata build flags are defined : 1191 1192- ``ERRATA_A725_2874943``: This applies errata 2874943 workaround to 1193 Cortex-A725 CPU. This needs to be enabled for revisions r0p0 when 1194 FEAT_SPE is enabled. It is fixed in r0p1. 1195 1196- ``ERRATA_A725_2936490``: This applies errata 2936490 workaround to 1197 Cortex-A725 CPU. This needs to be enabled for revisions r0p0. 1198 It is fixed in r0p1. 1199 1200- ``ERRATA_A725_3456106``: This applies errata 3456106 workaround to 1201 Cortex-A725 CPU. This needs to be enabled for revisions r0p0, r0p1 1202 and r0p2. It is still open. 1203 1204- ``ERRATA_A725_3699564``: This applies errata 3699564 workaround to 1205 Cortex-A725 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1206 It is fixed in r0p2. 1207 1208- ``ERRATA_A725_3711914``: This applies errata 3711914 workaround to 1209 Cortex-A725 CPU. This needs to be enabled for revisions r0p0 and r0p1. 1210 It is fixed in r0p2. 1211 1212For C1-Ultra, the following errata build flags are defined : 1213 1214- ``ERRATA_C1ULTRA_3324333``: This applies erratum 3324333 workaround to 1215 C1-Ultra CPU. This needs to be enabled for revision r0p0 and is fixed 1216 in r1p0. 1217 1218- ``ERRATA_C1ULTRA_3502731``: This applies erratum 3502731 workaround to 1219 C1-Ultra CPU. This needs to be enabled for revision r0p0 and is 1220 fixed in r1p0. 1221 1222- ``ERRATA_C1ULTRA_3651221``: This applies erratum 3651221 workaround to 1223 C1-Ultra CPU. This needs to be enabled for revision r0p0 and is 1224 fixed in r1p0. 1225 1226- ``ERRATA_C1ULTRA_3658374``: This applies erratum 3658374 workaround to 1227 C1-Ultra CPU. This needs to be enabled for revisions r0p0 and r1p0 and 1228 is still open. 1229 1230- ``ERRATA_C1ULTRA_3684152``: This applies erratum 3684152 workaround to 1231 C1-Ultra CPU. This needs to be enabled for revision r0p0 and is 1232 fixed in r1p0. 1233 1234- ``ERRATA_C1ULTRA_3705939``: This applies erratum 3705939 workaround to 1235 C1-Ultra CPU. This needs to be enabled for revisions r0p0 and r1p0 and 1236 is still open. 1237 1238- ``ERRATA_C1ULTRA_3815514``: This applies erratum 3815514 workaround to 1239 C1-Ultra CPU. This needs to be enabled for revisions r0p0 and r1p0 and 1240 is still open. 1241 1242- ``ERRATA_C1ULTRA_3865171``: This applies erratum 3865171 workaround to 1243 C1-Ultra CPU. This needs to be enabled for revisions r0p0 and r1p0 and 1244 is still open. 1245 1246- ``ERRATA_C1ULTRA_3926381``: This applies erratum 3926381 workaround to 1247 C1-Ultra CPU. This needs to be enabled for revision r1p0 and is still 1248 open. 1249 1250- ``ERRATA_C1ULTRA_4102704``: This applies erratum 4102704 workaround to 1251 C1-Ultra CPU. This needs to be enabled for revisions r0p0 and r1p0 and 1252 is still open. 1253 1254For C1-Premium, the following errata build flags are defined : 1255 1256- ``ERRATA_C1PREMIUM_3324333``: This applies errata 3324333 workaround to 1257 C1-Premium CPU. This needs to be enabled for revision r0p0, and is 1258 fixed in r1p0. 1259 1260- ``ERRATA_C1PREMIUM_3502731``: This applies errata 3502731 workaround to 1261 C1-Premium CPU. This needs to be enabled for revision r0p0, and is fixed 1262 in r1p0. 1263 1264- ``ERRATA_C1PREMIUM_3651221``: This applies errata 3651221 workaround to 1265 C1-Premium CPU. This needs to be enabled for revision r0p0, and is fixed 1266 in r1p0. 1267 1268- ``ERRATA_C1PREMIUM_3684152``: This applies errata 3684152 workaround to 1269 C1-Premium CPU. This needs to be enabled for revision r0p0, and is fixed 1270 in r1p0. 1271 1272- ``ERRATA_C1PREMIUM_3705939``: This applies errata 3705939 workaround to 1273 C1-Premium CPU. This needs to be enabled for revisions r0p0, r1p0 and 1274 is still open. 1275 1276- ``ERRATA_C1PREMIUM_3815514``: This applies errata 3815514 workaround to 1277 C1-Premium CPU. This needs to be enabled for revisions r0p0, r1p0 and 1278 is still open. 1279 1280- ``ERRATA_C1PREMIUM_3865171``: This applies errata 3865171 workaround to 1281 C1-Premium CPU. This needs to be enabled for revisions r0p0, r1p0 and 1282 is still open. 1283 1284- ``ERRATA_C1PREMIUM_3926381``: This applies errata 3926381 workaround to 1285 C1-Premium CPU. This needs to be enabled for revision r1p0 and is 1286 still open. 1287 1288- ``ERRATA_C1PREMIUM_4102704``: This applies errata 4102704 workaround to 1289 C1-Premium CPU. This needs to be enabled for revisions r0p0, r1p0 and 1290 is still open. 1291 1292DSU Errata Workarounds 1293---------------------- 1294 1295Similar to CPU errata, TF-A also implements workarounds for DSU (DynamIQ 1296Shared Unit) errata. The DSU errata details can be found in the respective Arm 1297documentation: 1298 1299- `Arm DSU Software Developers Errata Notice`_. 1300 1301Each erratum is identified by an ``ID``, as defined in the DSU errata notice 1302document. Thus, the build flags which enable/disable the errata workarounds 1303have the format ``ERRATA_DSU_<ID>``. The implementation and application logic 1304of DSU errata workarounds are similar to `CPU errata workarounds`_. 1305 1306For DSU errata, the following build flags are defined: 1307 1308- ``ERRATA_DSU_798953``: This applies errata 798953 workaround for the 1309 affected DSU configurations. This errata applies only for those DSUs that 1310 revision is r0p0 (on r0p1 it is fixed). However, please note that this 1311 workaround results in increased DSU power consumption on idle. 1312 1313- ``ERRATA_DSU_936184``: This applies errata 936184 workaround for the 1314 affected DSU configurations. This errata applies only for those DSUs that 1315 contain the ACP interface **and** the DSU revision is older than r2p0 (on 1316 r2p0 it is fixed). However, please note that this workaround results in 1317 increased DSU power consumption on idle. 1318 1319- ``ERRATA_DSU_2313941``: This applies errata 2313941 workaround for the 1320 affected DSU configurations. This errata applies for those DSUs with 1321 revisions r0p0, r1p0, r2p0, r2p1, r3p0, r3p1 and is still open. However, 1322 please note that this workaround results in increased DSU power consumption 1323 on idle. 1324 1325- ``ERRATA_DSU_2900952``: This applies errata 2900952 workaround for the 1326 affected DSU-120 configurations. This erratum applies to some r2p0 1327 implementations and is fixed in r2p1. The affected r2p0 implementations 1328 are determined by reading the IMP_CLUSTERREVIDR_EL1[1] register bit 1329 and making sure it's clear. 1330 1331CPU Specific optimizations 1332-------------------------- 1333 1334This section describes some of the optimizations allowed by the CPU micro 1335architecture that can be enabled by the platform as desired. 1336 1337- ``SKIP_A57_L1_FLUSH_PWR_DWN``: This flag enables an optimization in the 1338 Cortex-A57 cluster power down sequence by not flushing the Level 1 data 1339 cache. The L1 data cache and the L2 unified cache are inclusive. A flush 1340 of the L2 by set/way flushes any dirty lines from the L1 as well. This 1341 is a known safe deviation from the Cortex-A57 TRM defined power down 1342 sequence. Each Cortex-A57 based platform must make its own decision on 1343 whether to use the optimization. 1344 1345- ``A53_DISABLE_NON_TEMPORAL_HINT``: This flag disables the cache non-temporal 1346 hint. The LDNP/STNP instructions as implemented on Cortex-A53 do not behave 1347 in a way most programmers expect, and will most probably result in a 1348 significant speed degradation to any code that employs them. The Armv8-A 1349 architecture (see Arm DDI 0487A.h, section D3.4.3) allows cores to ignore 1350 the non-temporal hint and treat LDNP/STNP as LDP/STP instead. Enabling this 1351 flag enforces this behaviour. This needs to be enabled only for revisions 1352 <= r0p3 of the CPU and is enabled by default. 1353 1354- ``A57_DISABLE_NON_TEMPORAL_HINT``: This flag has the same behaviour as 1355 ``A53_DISABLE_NON_TEMPORAL_HINT`` but for Cortex-A57. This needs to be 1356 enabled only for revisions <= r1p2 of the CPU and is enabled by default, 1357 as recommended in section "4.7 Non-Temporal Loads/Stores" of the 1358 `Cortex-A57 Software Optimization Guide`_. 1359 1360- ''A57_ENABLE_NON_CACHEABLE_LOAD_FWD'': This flag enables non-cacheable 1361 streaming enhancement feature for Cortex-A57 CPUs. Platforms can set 1362 this bit only if their memory system meets the requirement that cache 1363 line fill requests from the Cortex-A57 processor are atomic. Each 1364 Cortex-A57 based platform must make its own decision on whether to use 1365 the optimization. This flag is disabled by default. 1366 1367- ``NEOVERSE_Nx_EXTERNAL_LLC``: This flag indicates that an external last 1368 level cache(LLC) is present in the system, and that the DataSource field 1369 on the master CHI interface indicates when data is returned from the LLC. 1370 This is used to control how the LL_CACHE* PMU events count. 1371 Default value is 0 (Disabled). 1372 1373- ``NEOVERSE_N2_PREFETCHER_DISABLE``: This flag disables the region prefetcher 1374 on the Neoverse N2 core. This is used during performance analysis to get clean 1375 and repeatable measurements of the cache by preventing speculative data fetches 1376 from interfering with benchmark results. 1377 Default value is 0 (Disabled). 1378 1379GIC Errata Workarounds 1380---------------------- 1381- ``GIC600_ERRATA_WA_2384374``: This flag applies part 2 of errata 2384374 1382 workaround for the affected GIC600 and GIC600-AE implementations. It applies 1383 to implementations of GIC600 and GIC600-AE with revisions less than or equal 1384 to r1p6 and r0p2 respectively. If the platform sets GICV3_SUPPORT_GIC600, 1385 then this flag is enabled; otherwise, it is 0 (Disabled). 1386 1387-------------- 1388 1389*Copyright (c) 2014-2025, Arm Limited and Contributors. All rights reserved.* 1390 1391.. _CVE-2017-5715: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5715 1392.. _CVE-2018-3639: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3639 1393.. _CVE-2022-23960: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23960 1394.. _CVE-2024-5660: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-5660 1395.. _CVE-2024-7881: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-7881 1396.. _Cortex-A72 MPCore Software Developers Errata Notice: https://developer.arm.com/documentation/epm012079/latest 1397.. _Cortex-A57 Software Optimization Guide: https://developer.arm.com/documentation/uan0015 1398.. _Arm DSU Software Developers Errata Notice: https://developer.arm.com/documentation/SDEN854652 1399