CONFIG_ARM_ERRATA_775420: ARM errata: A data cache maintenance operation which aborts, might lead to deadlock

General informations

The Linux kernel configuration item CONFIG_ARM_ERRATA_775420:

• prompt: ARM errata: A data cache maintenance operation which aborts, might lead to deadlock
• type: bool
• depends on: CONFIG_CPU_V7
• defined in arch/arm/Kconfig
• found in Linux kernels: 3.7–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.13

Help text

This option enables the workaround for the 775420 Cortex-A9 (r2p2, r2p6,r2p8,r2p10,r3p0) erratum. In case a data cache maintenance operation aborts with MMU exception, it might cause the processor to deadlock. This workaround puts DSB before executing ISB if an abort may occur on cache maintenance.

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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