CONFIG_ARM64_ERRATUM_2457168 is not available for the selected architecture x86.
Result is shown for architecture arm64
Cortex-A510: 2457168: workaround for AMEVCNTR01 incrementing incorrectly
configname: CONFIG_ARM64_ERRATUM_2457168
Linux Kernel Configuration
└─>Kernel Features
└─>ARM errata workarounds via the alternatives framework
└─>Cortex-A510: 2457168: workaround for AMEVCNTR01 incrementing incorrectly
In linux kernel since version 5.2 (release Date: 2019-07-07)
This option adds the workaround for ARM Cortex-A510 erratum 2457168.
The AMU counter AMEVCNTR01 (constant counter) should increment at the same rate
as the system counter. On affected Cortex-A510 cores AMEVCNTR01 increments
incorrectly giving a significantly higher output value.
Work around this problem by keeping the reference values of affected counters
to 0 thus signaling an error case. This effect is the same to firmware disabling
affected counters, in which case 0 will be returned when reading the disabled
counters.
If unsure, say Y.
The AMU counter AMEVCNTR01 (constant counter) should increment at the same rate
as the system counter. On affected Cortex-A510 cores AMEVCNTR01 increments
incorrectly giving a significantly higher output value.
Work around this problem by keeping the reference values of affected counters
to 0 thus signaling an error case. This effect is the same to firmware disabling
affected counters, in which case 0 will be returned when reading the disabled
counters.
If unsure, say Y.