Cortex-A510: 2658417: remove BF16 support due to incorrect result
configname: CONFIG_ARM64_ERRATUM_2658417
Linux Kernel Configuration
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Kernel Features
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ARM errata workarounds via the alternatives framework
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Cortex-A510: 2658417: remove BF16 support due to incorrect result
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.
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.