CONFIG_ARM_ERRATA_821420: ARM errata: A12: sequence of VMOV to core registers might lead to a dead lock

General informations

The Linux kernel configuration item CONFIG_ARM_ERRATA_821420:

• prompt: ARM errata: A12: sequence of VMOV to core registers might lead to a dead lock
• 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 the 821420 Cortex-A12 (all revs) erratum. In very rare timing conditions, a sequence of VMOV to Core registers instructions, for which the second one is in the shadow of a branch or abort, can lead to a deadlock when the VMOV instructions are issued out-of-order.

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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