CONFIG_DATA_SHIFT is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
Data shift
configname: CONFIG_DATA_SHIFT
Linux Kernel Configuration
└─>Kernel options
└─>Data shift
In linux kernel since version 5.1 (release Date: 2019-05-05)
On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO.
Smaller is the alignment, greater is the number of necessary DBATs.
On 8xx, large pages (512kb or 8M) are used to map kernel linear
memory. Aligning to 8M reduces TLB misses as only 8M pages are used
in that case. If PIN_TLB is selected, it must be aligned to 8M as
8M pages will be pinned.
Smaller is the alignment, greater is the number of necessary DBATs.
On 8xx, large pages (512kb or 8M) are used to map kernel linear
memory. Aligning to 8M reduces TLB misses as only 8M pages are used
in that case. If PIN_TLB is selected, it must be aligned to 8M as
8M pages will be pinned.