RVFI - Better XRET handling and better minstret csr sampling

openhwgroup / cv32e40p

CV32E40P is an in-order 4-stage RISC-V RV32IMFCXpulp CPU based on RI5CY from PULP-Platform

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Closed YoannPruvost closed 6 months ago

YoannPruvost commented 6 months ago

Replace old minstret sampling workaround by sampling 2 cycles after ID is done
Clean dpc sampling and improve XRET handling by sending xret instruction to RVFI when decoder is in XRET_JUMP state