CONFIG_ARM_ERRATA_818325_852422: ARM errata: A12: some seqs of opposed cond code instrs => deadlock or corruption

General informations

The Linux kernel configuration item CONFIG_ARM_ERRATA_818325_852422:

• prompt: ARM errata: A12: some seqs of opposed cond code instrs => deadlock or corruption
• type: bool
• depends on: CONFIG_CPU_V7
• defined in arch/arm/Kconfig
• found in Linux kernels: 4.8–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

This option enables the workaround for: - Cortex-A12 818325: Execution of an UNPREDICTABLE STR or STM instruction might deadlock. Fixed in r0p1. - Cortex-A12 852422: Execution of a sequence of instructions might lead to either a data corruption or a CPU deadlock. Not fixed in any Cortex-A12 cores yet. This workaround for all both errata involves setting bit[12] of the Feature Register. This bit disables an optimisation applied to a sequence of 2 instructions that use opposing condition codes.

Hardware

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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