CONFIG_ARM64_ERRATUM_1542419: Neoverse-N1: workaround mis-ordering of instruction fetches (rare)

General informations

The Linux kernel configuration item CONFIG_ARM64_ERRATUM_1542419 has multiple definitions:

Neoverse-N1: workaround mis-ordering of instruction fetches (rare) found in arch/arm64/Kconfig

The configuration item CONFIG_ARM64_ERRATUM_1542419:

• prompt: Neoverse-N1: workaround mis-ordering of instruction fetches (rare)
• type: bool
• depends on: (none)
• defined in arch/arm64/Kconfig
• found in Linux kernels: 6.9-rc+HEAD

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 N.

Neoverse-N1: workaround mis-ordering of instruction fetches found in arch/arm64/Kconfig

The configuration item CONFIG_ARM64_ERRATUM_1542419:

• prompt: Neoverse-N1: workaround mis-ordering of instruction fetches
• type: bool
• depends on: (none)
• defined in arch/arm64/Kconfig
• found in Linux kernels: 5.5–5.19, 6.0–6.8

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

LKDDb

Raw data from LKDDb:

• (none)

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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