Openocd STLink reset not working
In most of cases, the CPU /reset pin/signal work as OC-ored logic, so the pull down will effectively reset the CPU core; It usually be pulled up through a resister to VCC; DO NOT directly connect it to VCC.
There is an output/high impedance (/RST) signal/pin on STLink V2, should be connected to Micro-controller’s chip /Reset. So it will be able to reset the the micro-controller the STLink V2. Through Jtag/SWD command, it can soft reset the micro-controller, if the debug unit is reachable and you configure the OpenOCD script properly.