CONFIG_HOST_VMSPLIT_3G is not available for thedefaultarchitecture x86.
Result is shown for architecture um
default or selected kernelversion does not have config value CONFIG_HOST_VMSPLIT_3G.
Result is shown for kernelversion 5.15.113

Default split (3G/1G user/kernel host split)

configname: CONFIG_HOST_VMSPLIT_3G

Host memory split
└─>Default split (3G/1G user/kernel host split)
In linux kernel since version 2.6.19 (release Date: 2006-11-29)