Documentation/arm64/silicon-errata.rst

   1 =======================================
   2 Silicon Errata and Software Workarounds
   3 =======================================
   4
   5 Author: Will Deacon <will.deacon@arm.com>
   6
   7 Date  : 27 November 2015
   8
   9 It is an unfortunate fact of life that hardware is often produced with
  10 so-called "errata", which can cause it to deviate from the architecture
  11 under specific circumstances.  For hardware produced by ARM, these
  12 errata are broadly classified into the following categories:
  13
  14   ==========  ========================================================
  15   Category A  A critical error without a viable workaround.
  16   Category B  A significant or critical error with an acceptable
  17               workaround.
  18   Category C  A minor error that is not expected to occur under normal
  19               operation.
  20   ==========  ========================================================
  21
  22 For more information, consult one of the "Software Developers Errata
  23 Notice" documents available on infocenter.arm.com (registration
  24 required).
  25
  26 As far as Linux is concerned, Category B errata may require some special
  27 treatment in the operating system. For example, avoiding a particular
  28 sequence of code, or configuring the processor in a particular way. A
  29 less common situation may require similar actions in order to declassify
  30 a Category A erratum into a Category C erratum. These are collectively
  31 known as "software workarounds" and are only required in the minority of
  32 cases (e.g. those cases that both require a non-secure workaround *and*
  33 can be triggered by Linux).
  34
  35 For software workarounds that may adversely impact systems unaffected by
  36 the erratum in question, a Kconfig entry is added under "Kernel
  37 Features" -> "ARM errata workarounds via the alternatives framework".
  38 These are enabled by default and patched in at runtime when an affected
  39 CPU is detected. For less-intrusive workarounds, a Kconfig option is not
  40 available and the code is structured (preferably with a comment) in such
  41 a way that the erratum will not be hit.
  42
  43 This approach can make it slightly onerous to determine exactly which
  44 errata are worked around in an arbitrary kernel source tree, so this
  45 file acts as a registry of software workarounds in the Linux Kernel and
  46 will be updated when new workarounds are committed and backported to
  47 stable kernels.
  48
  49 +----------------+-----------------+-----------------+-----------------------------+
  50 | Implementor    | Component       | Erratum ID      | Kconfig                     |
  51 +================+=================+=================+=============================+
  52 | Allwinner      | A64/R18         | UNKNOWN1        | SUN50I_ERRATUM_UNKNOWN1     |
  53 +----------------+-----------------+-----------------+-----------------------------+
  54 +----------------+-----------------+-----------------+-----------------------------+
  55 | ARM            | Cortex-A53      | #826319         | ARM64_ERRATUM_826319        |
  56 +----------------+-----------------+-----------------+-----------------------------+
  57 | ARM            | Cortex-A53      | #827319         | ARM64_ERRATUM_827319        |
  58 +----------------+-----------------+-----------------+-----------------------------+
  59 | ARM            | Cortex-A53      | #824069         | ARM64_ERRATUM_824069        |
  60 +----------------+-----------------+-----------------+-----------------------------+
  61 | ARM            | Cortex-A53      | #819472         | ARM64_ERRATUM_819472        |
  62 +----------------+-----------------+-----------------+-----------------------------+
  63 | ARM            | Cortex-A53      | #845719         | ARM64_ERRATUM_845719        |
  64 +----------------+-----------------+-----------------+-----------------------------+
  65 | ARM            | Cortex-A53      | #843419         | ARM64_ERRATUM_843419        |
  66 +----------------+-----------------+-----------------+-----------------------------+
  67 | ARM            | Cortex-A57      | #832075         | ARM64_ERRATUM_832075        |
  68 +----------------+-----------------+-----------------+-----------------------------+
  69 | ARM            | Cortex-A57      | #852523         | N/A                         |
  70 +----------------+-----------------+-----------------+-----------------------------+
  71 | ARM            | Cortex-A57      | #834220         | ARM64_ERRATUM_834220        |
  72 +----------------+-----------------+-----------------+-----------------------------+
  73 | ARM            | Cortex-A72      | #853709         | N/A                         |
  74 +----------------+-----------------+-----------------+-----------------------------+
  75 | ARM            | Cortex-A73      | #858921         | ARM64_ERRATUM_858921        |
  76 +----------------+-----------------+-----------------+-----------------------------+
  77 | ARM            | Cortex-A55      | #1024718        | ARM64_ERRATUM_1024718       |
  78 +----------------+-----------------+-----------------+-----------------------------+
  79 | ARM            | Cortex-A76      | #1188873,1418040| ARM64_ERRATUM_1418040       |
  80 +----------------+-----------------+-----------------+-----------------------------+
  81 | ARM            | Cortex-A76      | #1165522        | ARM64_ERRATUM_1165522       |
  82 +----------------+-----------------+-----------------+-----------------------------+
  83 | ARM            | Cortex-A76      | #1286807        | ARM64_ERRATUM_1286807       |
  84 +----------------+-----------------+-----------------+-----------------------------+
  85 | ARM            | Cortex-A76      | #1463225        | ARM64_ERRATUM_1463225       |
  86 +----------------+-----------------+-----------------+-----------------------------+
  87 | ARM            | Neoverse-N1     | #1188873,1418040| ARM64_ERRATUM_1418040       |
  88 +----------------+-----------------+-----------------+-----------------------------+
  89 | ARM            | Neoverse-N1     | #1349291        | N/A                         |
  90 +----------------+-----------------+-----------------+-----------------------------+
  91 | ARM            | MMU-500         | #841119,826419  | N/A                         |
  92 +----------------+-----------------+-----------------+-----------------------------+
  93 +----------------+-----------------+-----------------+-----------------------------+
  94 | Cavium         | ThunderX ITS    | #22375,24313    | CAVIUM_ERRATUM_22375        |
  95 +----------------+-----------------+-----------------+-----------------------------+
  96 | Cavium         | ThunderX ITS    | #23144          | CAVIUM_ERRATUM_23144        |
  97 +----------------+-----------------+-----------------+-----------------------------+
  98 | Cavium         | ThunderX GICv3  | #23154          | CAVIUM_ERRATUM_23154        |
  99 +----------------+-----------------+-----------------+-----------------------------+
 100 | Cavium         | ThunderX Core   | #27456          | CAVIUM_ERRATUM_27456        |
 101 +----------------+-----------------+-----------------+-----------------------------+
 102 | Cavium         | ThunderX Core   | #30115          | CAVIUM_ERRATUM_30115        |
 103 +----------------+-----------------+-----------------+-----------------------------+
 104 | Cavium         | ThunderX SMMUv2 | #27704          | N/A                         |
 105 +----------------+-----------------+-----------------+-----------------------------+
 106 | Cavium         | ThunderX2 SMMUv3| #74             | N/A                         |
 107 +----------------+-----------------+-----------------+-----------------------------+
 108 | Cavium         | ThunderX2 SMMUv3| #126            | N/A                         |
 109 +----------------+-----------------+-----------------+-----------------------------+
 110 +----------------+-----------------+-----------------+-----------------------------+
 111 | Freescale/NXP  | LS2080A/LS1043A | A-008585        | FSL_ERRATUM_A008585         |
 112 +----------------+-----------------+-----------------+-----------------------------+
 113 +----------------+-----------------+-----------------+-----------------------------+
 114 | Hisilicon      | Hip0{5,6,7}     | #161010101      | HISILICON_ERRATUM_161010101 |
 115 +----------------+-----------------+-----------------+-----------------------------+
 116 | Hisilicon      | Hip0{6,7}       | #161010701      | N/A                         |
 117 +----------------+-----------------+-----------------+-----------------------------+
 118 | Hisilicon      | Hip07           | #161600802      | HISILICON_ERRATUM_161600802 |
 119 +----------------+-----------------+-----------------+-----------------------------+
 120 | Hisilicon      | Hip08 SMMU PMCG | #162001800      | N/A                         |
 121 +----------------+-----------------+-----------------+-----------------------------+
 122 +----------------+-----------------+-----------------+-----------------------------+
 123 | Qualcomm Tech. | Kryo/Falkor v1  | E1003           | QCOM_FALKOR_ERRATUM_1003    |
 124 +----------------+-----------------+-----------------+-----------------------------+
 125 | Qualcomm Tech. | Falkor v1       | E1009           | QCOM_FALKOR_ERRATUM_1009    |
 126 +----------------+-----------------+-----------------+-----------------------------+
 127 | Qualcomm Tech. | QDF2400 ITS     | E0065           | QCOM_QDF2400_ERRATUM_0065   |
 128 +----------------+-----------------+-----------------+-----------------------------+
 129 | Qualcomm Tech. | Falkor v{1,2}   | E1041           | QCOM_FALKOR_ERRATUM_1041    |
 130 +----------------+-----------------+-----------------+-----------------------------+
 131 +----------------+-----------------+-----------------+-----------------------------+
 132 | Fujitsu        | A64FX           | E#010001        | FUJITSU_ERRATUM_010001      |
 133 +----------------+-----------------+-----------------+-----------------------------+