projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b693d0b3 MCC |
1 | ======================================= |
| 2 | Silicon Errata and Software Workarounds | |
| 3 | ======================================= | |
| 9cb9c9e5 WD |
4 | |
| 5 | Author: Will Deacon <will.deacon@arm.com> | |
| b693d0b3 | 6 | |
| 9cb9c9e5 WD |
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 | ||
| b693d0b3 MCC |
14 | ========== ======================================================== |
| 15 | Category A A critical error without a viable workaround. | |
| 16 | Category B A significant or critical error with an acceptable | |
| 9cb9c9e5 | 17 | workaround. |
| b693d0b3 | 18 | Category C A minor error that is not expected to occur under normal |
| 9cb9c9e5 | 19 | operation. |
| b693d0b3 | 20 | ========== ======================================================== |
| 9cb9c9e5 WD |
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 | ||
| 6e01398f | 49 | +----------------+-----------------+-----------------+-----------------------------+ |
| b693d0b3 MCC |
50 | | Implementor | Component | Erratum ID | Kconfig | |
| 51 | +================+=================+=================+=============================+ | |
| c950ca8c | 52 | | Allwinner | A64/R18 | UNKNOWN1 | SUN50I_ERRATUM_UNKNOWN1 | |
| b693d0b3 MCC |
53 | +----------------+-----------------+-----------------+-----------------------------+ |
| 54 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 6e01398f | 55 | | ARM | Cortex-A53 | #826319 | ARM64_ERRATUM_826319 | |
| b693d0b3 | 56 | +----------------+-----------------+-----------------+-----------------------------+ |
| 6e01398f | 57 | | ARM | Cortex-A53 | #827319 | ARM64_ERRATUM_827319 | |
| b693d0b3 | 58 | +----------------+-----------------+-----------------+-----------------------------+ |
| 6e01398f | 59 | | ARM | Cortex-A53 | #824069 | ARM64_ERRATUM_824069 | |
| b693d0b3 | 60 | +----------------+-----------------+-----------------+-----------------------------+ |
| 6e01398f | 61 | | ARM | Cortex-A53 | #819472 | ARM64_ERRATUM_819472 | |
| b693d0b3 | 62 | +----------------+-----------------+-----------------+-----------------------------+ |
| 6e01398f | 63 | | ARM | Cortex-A53 | #845719 | ARM64_ERRATUM_845719 | |
| b693d0b3 | 64 | +----------------+-----------------+-----------------+-----------------------------+ |
| 6e01398f | 65 | | ARM | Cortex-A53 | #843419 | ARM64_ERRATUM_843419 | |
| b693d0b3 | 66 | +----------------+-----------------+-----------------+-----------------------------+ |
| 184dbc15 RH |
67 | | ARM | Cortex-A55 | #1024718 | ARM64_ERRATUM_1024718 | |
| 68 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 69 | | ARM | Cortex-A55 | #1530923 | ARM64_ERRATUM_1530923 | | |
| 70 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 6e01398f | 71 | | ARM | Cortex-A57 | #832075 | ARM64_ERRATUM_832075 | |
| b693d0b3 | 72 | +----------------+-----------------+-----------------+-----------------------------+ |
| 6e01398f | 73 | | ARM | Cortex-A57 | #852523 | N/A | |
| b693d0b3 | 74 | +----------------+-----------------+-----------------+-----------------------------+ |
| 6e01398f | 75 | | ARM | Cortex-A57 | #834220 | ARM64_ERRATUM_834220 | |
| b693d0b3 | 76 | +----------------+-----------------+-----------------+-----------------------------+ |
| c2cc62d8 MZ |
77 | | ARM | Cortex-A57 | #1319537 | ARM64_ERRATUM_1319367 | |
| 78 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 6e01398f | 79 | | ARM | Cortex-A72 | #853709 | N/A | |
| b693d0b3 | 80 | +----------------+-----------------+-----------------+-----------------------------+ |
| c2cc62d8 MZ |
81 | | ARM | Cortex-A72 | #1319367 | ARM64_ERRATUM_1319367 | |
| 82 | +----------------+-----------------+-----------------+-----------------------------+ | |
| eeb1efbc | 83 | | ARM | Cortex-A73 | #858921 | ARM64_ERRATUM_858921 | |
| b693d0b3 | 84 | +----------------+-----------------+-----------------+-----------------------------+ |
| a5325089 | 85 | | ARM | Cortex-A76 | #1188873,1418040| ARM64_ERRATUM_1418040 | |
| b693d0b3 | 86 | +----------------+-----------------+-----------------+-----------------------------+ |
| a457b0f7 | 87 | | ARM | Cortex-A76 | #1165522 | ARM64_ERRATUM_1165522 | |
| b693d0b3 | 88 | +----------------+-----------------+-----------------+-----------------------------+ |
| ce8c80c5 | 89 | | ARM | Cortex-A76 | #1286807 | ARM64_ERRATUM_1286807 | |
| b693d0b3 | 90 | +----------------+-----------------+-----------------+-----------------------------+ |
| 969f5ea6 | 91 | | ARM | Cortex-A76 | #1463225 | ARM64_ERRATUM_1463225 | |
| b693d0b3 | 92 | +----------------+-----------------+-----------------+-----------------------------+ |
| 96d389ca RH |
93 | | ARM | Cortex-A77 | #1508412 | ARM64_ERRATUM_1508412 | |
| 94 | +----------------+-----------------+-----------------+-----------------------------+ | |
| a5325089 | 95 | | ARM | Neoverse-N1 | #1188873,1418040| ARM64_ERRATUM_1418040 | |
| b693d0b3 | 96 | +----------------+-----------------+-----------------+-----------------------------+ |
| 3276cc24 | 97 | | ARM | Neoverse-N1 | #1349291 | N/A | |
| 39d7530d | 98 | +----------------+-----------------+-----------------+-----------------------------+ |
| 05460849 JM |
99 | | ARM | Neoverse-N1 | #1542419 | ARM64_ERRATUM_1542419 | |
| 100 | +----------------+-----------------+-----------------+-----------------------------+ | |
| a5325089 | 101 | | ARM | MMU-500 | #841119,826419 | N/A | |
| b693d0b3 MCC |
102 | +----------------+-----------------+-----------------+-----------------------------+ |
| 103 | +----------------+-----------------+-----------------+-----------------------------+ | |
| bfc97f9f DB |
104 | | Broadcom | Brahma-B53 | N/A | ARM64_ERRATUM_845719 | |
| 105 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 1cf45b8f FF |
106 | | Broadcom | Brahma-B53 | N/A | ARM64_ERRATUM_843419 | |
| 107 | +----------------+-----------------+-----------------+-----------------------------+ | |
| bfc97f9f | 108 | +----------------+-----------------+-----------------+-----------------------------+ |
| a5325089 | 109 | | Cavium | ThunderX ITS | #22375,24313 | CAVIUM_ERRATUM_22375 | |
| b693d0b3 | 110 | +----------------+-----------------+-----------------+-----------------------------+ |
| 6e01398f | 111 | | Cavium | ThunderX ITS | #23144 | CAVIUM_ERRATUM_23144 | |
| b693d0b3 | 112 | +----------------+-----------------+-----------------+-----------------------------+ |
| 6e01398f | 113 | | Cavium | ThunderX GICv3 | #23154 | CAVIUM_ERRATUM_23154 | |
| b693d0b3 | 114 | +----------------+-----------------+-----------------+-----------------------------+ |
| d01fd161 MZ |
115 | | Cavium | ThunderX GICv3 | #38539 | N/A | |
| 116 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 6e01398f | 117 | | Cavium | ThunderX Core | #27456 | CAVIUM_ERRATUM_27456 | |
| b693d0b3 | 118 | +----------------+-----------------+-----------------+-----------------------------+ |
| 690a3415 | 119 | | Cavium | ThunderX Core | #30115 | CAVIUM_ERRATUM_30115 | |
| b693d0b3 | 120 | +----------------+-----------------+-----------------+-----------------------------+ |
| 6e01398f | 121 | | Cavium | ThunderX SMMUv2 | #27704 | N/A | |
| b693d0b3 | 122 | +----------------+-----------------+-----------------+-----------------------------+ |
| e5b829de | 123 | | Cavium | ThunderX2 SMMUv3| #74 | N/A | |
| b693d0b3 | 124 | +----------------+-----------------+-----------------+-----------------------------+ |
| f935448a | 125 | | Cavium | ThunderX2 SMMUv3| #126 | N/A | |
| b693d0b3 | 126 | +----------------+-----------------+-----------------+-----------------------------+ |
| 603afdc9 MZ |
127 | | Cavium | ThunderX2 Core | #219 | CAVIUM_TX2_ERRATUM_219 | |
| 128 | +----------------+-----------------+-----------------+-----------------------------+ | |
| b693d0b3 | 129 | +----------------+-----------------+-----------------+-----------------------------+ |
| f2d9848a HH |
130 | | Marvell | ARM-MMU-500 | #582743 | N/A | |
| 131 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 132 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 20109a85 RW |
133 | | NVIDIA | Carmel Core | N/A | NVIDIA_CARMEL_CNP_ERRATUM | |
| 134 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 135 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 6e01398f | 136 | | Freescale/NXP | LS2080A/LS1043A | A-008585 | FSL_ERRATUM_A008585 | |
| b693d0b3 MCC |
137 | +----------------+-----------------+-----------------+-----------------------------+ |
| 138 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 6e01398f | 139 | | Hisilicon | Hip0{5,6,7} | #161010101 | HISILICON_ERRATUM_161010101 | |
| b693d0b3 | 140 | +----------------+-----------------+-----------------+-----------------------------+ |
| 99caf177 | 141 | | Hisilicon | Hip0{6,7} | #161010701 | N/A | |
| b693d0b3 | 142 | +----------------+-----------------+-----------------+-----------------------------+ |
| 7f2481b3 MZ |
143 | | Hisilicon | Hip0{6,7} | #161010803 | N/A | |
| 144 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 5c9a882e | 145 | | Hisilicon | Hip07 | #161600802 | HISILICON_ERRATUM_161600802 | |
| b693d0b3 | 146 | +----------------+-----------------+-----------------+-----------------------------+ |
| 24062fe8 | 147 | | Hisilicon | Hip08 SMMU PMCG | #162001800 | N/A | |
| b693d0b3 MCC |
148 | +----------------+-----------------+-----------------+-----------------------------+ |
| 149 | +----------------+-----------------+-----------------+-----------------------------+ | |
| bb487118 | 150 | | Qualcomm Tech. | Kryo/Falkor v1 | E1003 | QCOM_FALKOR_ERRATUM_1003 | |
| b693d0b3 | 151 | +----------------+-----------------+-----------------+-----------------------------+ |
| 36c602dc | 152 | | Qualcomm Tech. | Kryo/Falkor v1 | E1009 | QCOM_FALKOR_ERRATUM_1009 | |
| b693d0b3 | 153 | +----------------+-----------------+-----------------+-----------------------------+ |
| 90922a2d | 154 | | Qualcomm Tech. | QDF2400 ITS | E0065 | QCOM_QDF2400_ERRATUM_0065 | |
| b693d0b3 | 155 | +----------------+-----------------+-----------------+-----------------------------+ |
| 932b50c7 | 156 | | Qualcomm Tech. | Falkor v{1,2} | E1041 | QCOM_FALKOR_ERRATUM_1041 | |
| b693d0b3 | 157 | +----------------+-----------------+-----------------+-----------------------------+ |
| a9e821b8 SPR |
158 | | Qualcomm Tech. | Kryo4xx Gold | N/A | ARM64_ERRATUM_1463225 | |
| 159 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 160 | | Qualcomm Tech. | Kryo4xx Gold | N/A | ARM64_ERRATUM_1418040 | | |
| 161 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 9b23d95c SPR |
162 | | Qualcomm Tech. | Kryo4xx Silver | N/A | ARM64_ERRATUM_1530923 | |
| 163 | +----------------+-----------------+-----------------+-----------------------------+ | |
| 164 | | Qualcomm Tech. | Kryo4xx Silver | N/A | ARM64_ERRATUM_1024718 | | |
| 165 | +----------------+-----------------+-----------------+-----------------------------+ | |
| b693d0b3 | 166 | +----------------+-----------------+-----------------+-----------------------------+ |
| 3e32131a | 167 | | Fujitsu | A64FX | E#010001 | FUJITSU_ERRATUM_010001 | |
| b693d0b3 | 168 | +----------------+-----------------+-----------------+-----------------------------+ |