CONFIG_ARC_DSP_AGU_USERSPACE is not available for thedefaultarchitecture x86.
Result is shown for architecture arc
Support DSP with AGU for userspace apps
configname: CONFIG_ARC_DSP_AGU_USERSPACE
DSP support
└─>Support DSP with AGU for userspace apps
In linux kernel since version 5.1 (release Date: 2019-05-05)
DSP and AGU extensions presence in HW, support save / restore DSP
and AGU registers to run DSP-enabled userspace applications
and AGU registers to run DSP-enabled userspace applications