CONFIG_ARCH_QCOM_RESERVE_SMEM is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Reserve SMEM at the beginning of RAM

configname: CONFIG_ARCH_QCOM_RESERVE_SMEM

Linux Kernel Configuration
└─>Qualcomm Support
└─>Reserve SMEM at the beginning of RAM
In linux kernel since version 6.1.89 (release Date: 2024-04-29)  
Reserve 2MB at the beginning of the System RAM for shared mem.
This is required on IPQ40xx, MSM8x60 and MSM8960 platforms.