CONFIG_AMPERE_ERRATUM_AC04_CPU_23 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64
default or selected kernelversion does not have config value CONFIG_AMPERE_ERRATUM_AC04_CPU_23.
Result is shown for kernelversion 6.16-rc6
AmpereOne: AC04_CPU_23: Failure to synchronize writes to HCR_EL2 may corrupt address translations.
configname: CONFIG_AMPERE_ERRATUM_AC04_CPU_23
Linux Kernel Configuration
└─>Kernel Features
└─>ARM errata workarounds via the alternatives framework
└─>AmpereOne: AC04_CPU_23: Failure to synchronize writes to HCR_EL2 may corrupt address translations.
In linux kernel since version 6.1.145 (release Date: 2025-07-14)
This option adds an alternative code sequence to work around Ampere
errata AC04_CPU_23 on AmpereOne.
Updates to HCR_EL2 can rarely corrupt simultaneous translations for
data addresses initiated by load/store instructions. Only
instruction initiated translations are vulnerable, not translations
from prefetches for example. A DSB before the store to HCR_EL2 is
sufficient to prevent older instructions from hitting the window
for corruption, and an ISB after is sufficient to prevent younger
instructions from hitting the window for corruption.
If unsure, say Y.
errata AC04_CPU_23 on AmpereOne.
Updates to HCR_EL2 can rarely corrupt simultaneous translations for
data addresses initiated by load/store instructions. Only
instruction initiated translations are vulnerable, not translations
from prefetches for example. A DSB before the store to HCR_EL2 is
sufficient to prevent older instructions from hitting the window
for corruption, and an ISB after is sufficient to prevent younger
instructions from hitting the window for corruption.
If unsure, say Y.