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CONFIG_ARM64_ERRATUM_1542419: Neoverse-N1: workaround mis-ordering of instruction fetches

General informations

The Linux kernel configuration item CONFIG_ARM64_ERRATUM_1542419:

Help text

This option adds a workaround for ARM Neoverse-N1 erratum 1542419.

Affected Neoverse-N1 cores could execute a stale instruction when modified by another CPU. The workaround depends on a firmware counterpart.

Workaround the issue by hiding the DIC feature from EL0. This forces user-space to perform cache maintenance.

If unsure, say Y.

Hardware

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