CONFIG_ARM64_ERRATUM_1530923 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64
Cortex-A55: 1530923: Speculative AT instruction using out-of-context translation regime could cause subsequent request to generate an incorrect translation
configname: CONFIG_ARM64_ERRATUM_1530923
Linux Kernel Configuration
└─>Kernel Features
└─>ARM errata workarounds via the alternatives framework
└─>Cortex-A55: 1530923: Speculative AT instruction using out-of-context translation regime could cause subsequent request to generate an incorrect translation
In linux kernel since version 5.1 (release Date: 2019-05-05)
This option adds a workaround for ARM Cortex-A55 erratum 1530923.
Affected Cortex-A55 cores (r0p0, r0p1, r1p0, r2p0) could end-up with
corrupted TLBs by speculating an AT instruction during a guest
context switch.
If unsure, say Y.
Affected Cortex-A55 cores (r0p0, r0p1, r1p0, r2p0) could end-up with
corrupted TLBs by speculating an AT instruction during a guest
context switch.
If unsure, say Y.