CONFIG_HP_SIMSCSI is not available for thedefaultarchitecture x86.
Result is shown for architecture ia64
default or selected kernelversion does not have config value CONFIG_HP_SIMSCSI.
Result is shown for kernelversion 6.9.9

Simulated SCSI disk

modulename: simscsi.ko

configname: CONFIG_HP_SIMSCSI

Linux Kernel Configuration
└─>HP Simulator drivers
└─>Simulated SCSI disk
In linux kernel since version 2.6.12  
source code:
arch/ia64/hp/sim/simscsi.c