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=======================================
Silicon Errata and Software Workarounds
=======================================
Author: Will Deacon <will.deacon@arm.com>
Date : 27 November 2015
It is an unfortunate fact of life that hardware is often produced with
so-called "errata", which can cause it to deviate from the architecture
under specific circumstances. For hardware produced by ARM, these
errata are broadly classified into the following categories:
========== ========================================================
Category A A critical error without a viable workaround.
Category B A significant or critical error with an acceptable
workaround.
Category C A minor error that is not expected to occur under normal
operation.
========== ========================================================
For more information, consult one of the "Software Developers Errata
Notice" documents available on infocenter.arm.com (registration
required).
As far as Linux is concerned, Category B errata may require some special
treatment in the operating system. For example, avoiding a particular
sequence of code, or configuring the processor in a particular way. A
less common situation may require similar actions in order to declassify
a Category A erratum into a Category C erratum. These are collectively
known as "software workarounds" and are only required in the minority of
cases (e.g. those cases that both require a non-secure workaround *and*
can be triggered by Linux).
For software workarounds that may adversely impact systems unaffected by
the erratum in question, a Kconfig entry is added under "Kernel
Features" -> "ARM errata workarounds via the alternatives framework".
With the exception of workarounds for errata deemed "rare" by Arm, these
are enabled by default and patched in at runtime when an affected CPU is
detected. For less-intrusive workarounds, a Kconfig option is not
available and the code is structured (preferably with a comment) in such
a way that the erratum will not be hit.
This approach can make it slightly onerous to determine exactly which
errata are worked around in an arbitrary kernel source tree, so this
file acts as a registry of software workarounds in the Linux Kernel and
will be updated when new workarounds are committed and backported to
stable kernels.
+----------------+-----------------+-----------------+-----------------------------+
| Implementor | Component | Erratum ID | Kconfig |
+================+=================+=================+=============================+
| Allwinner | A64/R18 | UNKNOWN1 | SUN50I_ERRATUM_UNKNOWN1 |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| Ampere | AmpereOne | AC03_CPU_38 | AMPERE_ERRATUM_AC03_CPU_38 |
+----------------+-----------------+-----------------+-----------------------------+
| Ampere | AmpereOne | AC03_CPU_57 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| Ampere | AmpereOne AC04 | AC04_CPU_10 | AMPERE_ERRATUM_AC03_CPU_38 |
+----------------+-----------------+-----------------+-----------------------------+
| Ampere | AmpereOne AC04 | AC04_CPU_23 | AMPERE_ERRATUM_AC04_CPU_23 |
+----------------+-----------------+-----------------+-----------------------------+
| Ampere | AmpereOne AC04 | AC04_CPU_29 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A510 | #2457168 | ARM64_ERRATUM_2457168 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A510 | #2064142 | ARM64_ERRATUM_2064142 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A510 | #2038923 | ARM64_ERRATUM_2038923 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A510 | #1902691 | ARM64_ERRATUM_1902691 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A510 | #2051678 | ARM64_ERRATUM_2051678 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A510 | #2077057 | ARM64_ERRATUM_2077057 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A510 | #2441009 | ARM64_ERRATUM_2441009 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A510 | #2658417 | ARM64_ERRATUM_2658417 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A510 | #3117295 | ARM64_ERRATUM_3117295 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A520 | #2966298 | ARM64_ERRATUM_2966298 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A53 | #826319 | ARM64_ERRATUM_826319 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A53 | #827319 | ARM64_ERRATUM_827319 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A53 | #824069 | ARM64_ERRATUM_824069 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A53 | #819472 | ARM64_ERRATUM_819472 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A53 | #845719 | ARM64_ERRATUM_845719 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A53 | #843419 | ARM64_ERRATUM_843419 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A55 | #1024718 | ARM64_ERRATUM_1024718 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A55 | #1530923 | ARM64_ERRATUM_1530923 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A55 | #2441007 | ARM64_ERRATUM_2441007 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A57 | #832075 | ARM64_ERRATUM_832075 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A57 | #852523 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A57 | #834220 | ARM64_ERRATUM_834220 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A57 | #1319537 | ARM64_ERRATUM_1319367 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A57 | #1742098 | ARM64_ERRATUM_1742098 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A72 | #853709 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A72 | #1319367 | ARM64_ERRATUM_1319367 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A72 | #1655431 | ARM64_ERRATUM_1742098 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A73 | #858921 | ARM64_ERRATUM_858921 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A76 | #1188873, | ARM64_ERRATUM_1418040 |
| | | #1418040 | |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A76 | #1165522 | ARM64_ERRATUM_1165522 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A76 | #1286807 | ARM64_ERRATUM_1286807 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A76 | #1463225 | ARM64_ERRATUM_1463225 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A76 | #1490853 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A76 | #3324349 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A76 | #4193800 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A76AE | #4193801 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A77 | #1491015 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A77 | #1508412 | ARM64_ERRATUM_1508412 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A77 | #3324348 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A77 | #4193798 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A78 | #3324344 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A78 | #4193791 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A78AE | #4193793 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A78C | #3324346, | ARM64_ERRATUM_3194386 |
| | | #3324347 | |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A78C | #4193794 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A710 | #2119858 | ARM64_ERRATUM_2119858 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A710 | #2054223 | ARM64_ERRATUM_2054223 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A710 | #2224489 | ARM64_ERRATUM_2224489 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A710 | #3324338 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A710 | #4193788 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A715 | #2645198 | ARM64_ERRATUM_2645198 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A715 | #3456084 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A720 | #3456091 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A725 | #3456106 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X1 | #1502854 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X1 | #3324344 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X1 | #4193791 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X1C | #3324346 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X1C | #4193792 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X2 | #2119858 | ARM64_ERRATUM_2119858 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X2 | #2224489 | ARM64_ERRATUM_2224489 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X2 | #3324338 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X2 | #4193788 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X3 | #3324335 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X3 | #4193786 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X4 | #3194386 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X4 | #4118414 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X925 | #3324334 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-X925 | #4193781 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N1 | #1188873, | ARM64_ERRATUM_1418040 |
| | | #1418040 | |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N1 | #1349291, | N/A |
| | | #1490853 | |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N1 | #1542419 | ARM64_ERRATUM_1542419 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N1 | #3324349 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N1 | #4193800 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N2 | #2139208 | ARM64_ERRATUM_2139208 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N2 | #2067961 | ARM64_ERRATUM_2067961 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N2 | #2253138 | ARM64_ERRATUM_2253138 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N2 | #3324339 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N2 | #4193789 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N3 | #3456111 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-V1 | #1619801 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-V1 | #3324341 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-V1 | #4193790 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-V2 | #3324336 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-V2 | #4193787 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-V3 | #3312417 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-V3 | #4193784 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-V3AE | #3312417 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-V3AE | #4193784 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | C1-Premium | #4193780 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | C1-Pro | #4193714 | ARM64_ERRATUM_4193714 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | C1-Ultra | #4193780 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | MMU-500 | #562869, | ARM_SMMU_MMU_500_CPRE_ERRATA|
| | | #841119, | |
| | | #826419, | |
| | | #1047329 | |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | MMU-600 | #1076982, | N/A |
| | | #1209401 | |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | MMU-700 | #2133013, | N/A |
| | | #2268618, | |
| | | #2812531, | |
| | | #3777127 | |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | MMU L1 | #3878312 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | MMU S3 | #3995052 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | GIC-700 | #2941627 | ARM64_ERRATUM_2941627 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | SI L1 | #4311569 | ARM64_ERRATUM_4311569 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | CMN-650 | #3642720 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| Broadcom | Brahma-B53 | N/A | ARM64_ERRATUM_845719 |
+----------------+-----------------+-----------------+-----------------------------+
| Broadcom | Brahma-B53 | N/A | ARM64_ERRATUM_843419 |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| Cavium | ThunderX ITS | #22375, | CAVIUM_ERRATUM_22375 |
| | | #24313 | |
+----------------+-----------------+-----------------+-----------------------------+
| Cavium | ThunderX ITS | #23144 | CAVIUM_ERRATUM_23144 |
+----------------+-----------------+-----------------+-----------------------------+
| Cavium | ThunderX GICv3 | #23154, | CAVIUM_ERRATUM_23154 |
| | | #38545 | |
+----------------+-----------------+-----------------+-----------------------------+
| Cavium | ThunderX GICv3 | #38539 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| Cavium | ThunderX Core | #27456 | CAVIUM_ERRATUM_27456 |
+----------------+-----------------+-----------------+-----------------------------+
| Cavium | ThunderX Core | #30115 | CAVIUM_ERRATUM_30115 |
+----------------+-----------------+-----------------+-----------------------------+
| Cavium | ThunderX SMMUv2 | #27704 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| Cavium | ThunderX2 SMMUv3| #74, | N/A |
| | | #126 | |
+----------------+-----------------+-----------------+-----------------------------+
| Cavium | ThunderX2 Core | #219 | CAVIUM_TX2_ERRATUM_219 |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| Marvell | ARM-MMU-500 | #582743 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| NVIDIA | Carmel Core | N/A | NVIDIA_CARMEL_CNP_ERRATUM |
+----------------+-----------------+-----------------+-----------------------------+
| NVIDIA | Olympus core | T410-OLY-1029 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| NVIDIA | T241 GICv3/4.x | T241-FABRIC-4 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| NVIDIA | T241 MPAM | T241-MPAM-1, | N/A |
| | | T241-MPAM-4, | |
| | | T241-MPAM-6 | |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| Freescale/NXP | LS2080A/LS1043A | A-008585 | FSL_ERRATUM_A008585 |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| Hisilicon | Hip0{5,6,7} | #161010101 | HISILICON_ERRATUM_161010101 |
+----------------+-----------------+-----------------+-----------------------------+
| Hisilicon | Hip0{6,7} | #161010701, | N/A |
| | | #161010803 | |
+----------------+-----------------+-----------------+-----------------------------+
| Hisilicon | Hip07 | #161600802 | HISILICON_ERRATUM_161600802 |
+----------------+-----------------+-----------------+-----------------------------+
| Hisilicon | Hip08 SMMU PMCG | #162001800 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| Hisilicon | Hip{08,09,09A,10| #162001900 | N/A |
| | ,10C,11} | | |
| | SMMU PMCG | | |
+----------------+-----------------+-----------------+-----------------------------+
| Hisilicon | Hip09 | #162100801 | HISILICON_ERRATUM_162100801 |
+----------------+-----------------+-----------------+-----------------------------+
| Hisilicon | Hip09 | #162100125 | HISILICON_ERRATUM_162100125 |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| Qualcomm Tech. | Kryo/Falkor v1 | E1003 | QCOM_FALKOR_ERRATUM_1003 |
+----------------+-----------------+-----------------+-----------------------------+
| Qualcomm Tech. | Kryo/Falkor v1 | E1009 | QCOM_FALKOR_ERRATUM_1009 |
+----------------+-----------------+-----------------+-----------------------------+
| Qualcomm Tech. | QDF2400 ITS | E0065 | QCOM_QDF2400_ERRATUM_0065 |
+----------------+-----------------+-----------------+-----------------------------+
| Qualcomm Tech. | Falkor v{1,2} | E1041 | QCOM_FALKOR_ERRATUM_1041 |
+----------------+-----------------+-----------------+-----------------------------+
| Qualcomm Tech. | Kryo4xx Gold | N/A | ARM64_ERRATUM_1463225 |
+----------------+-----------------+-----------------+-----------------------------+
| Qualcomm Tech. | Kryo4xx Gold | N/A | ARM64_ERRATUM_1418040 |
+----------------+-----------------+-----------------+-----------------------------+
| Qualcomm Tech. | Kryo4xx Silver | N/A | ARM64_ERRATUM_1530923 |
+----------------+-----------------+-----------------+-----------------------------+
| Qualcomm Tech. | Kryo4xx Silver | N/A | ARM64_ERRATUM_1024718 |
+----------------+-----------------+-----------------+-----------------------------+
| Qualcomm Tech. | Kryo4xx Gold | N/A | ARM64_ERRATUM_1286807 |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| Rockchip | RK3588 | #3588001 | ROCKCHIP_ERRATUM_3588001 |
+----------------+-----------------+-----------------+-----------------------------+
| Rockchip | RK3568 | #3568002 | ROCKCHIP_ERRATUM_3568002 |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| Fujitsu | A64FX | E#010001 | FUJITSU_ERRATUM_010001 |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| ASR | ASR8601 | #8601001 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
| Microsoft | Azure Cobalt 100| #2139208 | ARM64_ERRATUM_2139208 |
+----------------+-----------------+-----------------+-----------------------------+
| Microsoft | Azure Cobalt 100| #2067961 | ARM64_ERRATUM_2067961 |
+----------------+-----------------+-----------------+-----------------------------+
| Microsoft | Azure Cobalt 100| #2253138 | ARM64_ERRATUM_2253138 |
+----------------+-----------------+-----------------+-----------------------------+
| Microsoft | Azure Cobalt 100| #3324339 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| Microsoft | Azure Cobalt 100| #4193789 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+