arm64: cpufeature: Enable Qualcomm Falkor errata 1009 for Kryo
[muen/linux.git] / 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 | Cavium         | ThunderX2 Core  | #219            | CAVIUM_TX2_ERRATUM_219      |
111 +----------------+-----------------+-----------------+-----------------------------+
112 +----------------+-----------------+-----------------+-----------------------------+
113 | Freescale/NXP  | LS2080A/LS1043A | A-008585        | FSL_ERRATUM_A008585         |
114 +----------------+-----------------+-----------------+-----------------------------+
115 +----------------+-----------------+-----------------+-----------------------------+
116 | Hisilicon      | Hip0{5,6,7}     | #161010101      | HISILICON_ERRATUM_161010101 |
117 +----------------+-----------------+-----------------+-----------------------------+
118 | Hisilicon      | Hip0{6,7}       | #161010701      | N/A                         |
119 +----------------+-----------------+-----------------+-----------------------------+
120 | Hisilicon      | Hip0{6,7}       | #161010803      | N/A                         |
121 +----------------+-----------------+-----------------+-----------------------------+
122 | Hisilicon      | Hip07           | #161600802      | HISILICON_ERRATUM_161600802 |
123 +----------------+-----------------+-----------------+-----------------------------+
124 | Hisilicon      | Hip08 SMMU PMCG | #162001800      | N/A                         |
125 +----------------+-----------------+-----------------+-----------------------------+
126 +----------------+-----------------+-----------------+-----------------------------+
127 | Qualcomm Tech. | Kryo/Falkor v1  | E1003           | QCOM_FALKOR_ERRATUM_1003    |
128 +----------------+-----------------+-----------------+-----------------------------+
129 | Qualcomm Tech. | Kryo/Falkor v1  | E1009           | QCOM_FALKOR_ERRATUM_1009    |
130 +----------------+-----------------+-----------------+-----------------------------+
131 | Qualcomm Tech. | QDF2400 ITS     | E0065           | QCOM_QDF2400_ERRATUM_0065   |
132 +----------------+-----------------+-----------------+-----------------------------+
133 | Qualcomm Tech. | Falkor v{1,2}   | E1041           | QCOM_FALKOR_ERRATUM_1041    |
134 +----------------+-----------------+-----------------+-----------------------------+
135 +----------------+-----------------+-----------------+-----------------------------+
136 | Fujitsu        | A64FX           | E#010001        | FUJITSU_ERRATUM_010001      |
137 +----------------+-----------------+-----------------+-----------------------------+