CONFIG_CPU_IBRS_ENTRY is not available for thedefaultarchitecture x86.
Result is shown for architecture 64BIT
Enable IBRS on kernel entry
configname: CONFIG_CPU_IBRS_ENTRY
Linux Kernel Configuration
└─>Mitigations for CPU vulnerabilities
└─>Enable IBRS on kernel entry
In linux kernel since version 4.14.326 (release Date: 2023-09-23)
Compile the kernel with support for the spectre_v2=ibrs mitigation.
This mitigates both spectre_v2 and retbleed at great cost to
performance.
This mitigates both spectre_v2 and retbleed at great cost to
performance.