CONFIG_ARM64_ERRATUM_2658417: Cortex-A510: 2658417: remove BF16 support due to incorrect result

General informations

The Linux kernel configuration item CONFIG_ARM64_ERRATUM_2658417:

• prompt: Cortex-A510: 2658417: remove BF16 support due to incorrect result
• type: bool
• depends on: (none)
• defined in arch/arm64/Kconfig
• found in Linux kernels: 6.1–6.8, 6.9-rc+HEAD

Help text

This option adds the workaround for ARM Cortex-A510 erratum 2658417. Affected Cortex-A510 (r0p0 to r1p1) may produce the wrong result for BFMMLA or VMMLA instructions in rare circumstances when a pair of A510 CPUs are using shared neon hardware. As the sharing is not discoverable by the kernel, hide the BF16 HWCAP to indicate that user-space should not be using these instructions.

If unsure, say Y.

Hardware

LKDDb

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• (none)

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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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