How to use own riscv target in micro tvm

Hey, In Bring microTVM to your own development environment

We define the target by passing the board name to # If your board is not included in the supported models, you can define the target such as: # TARGET =“c -keys=arm_cpu,cpu -mcpu=cortex-m4”) TARGET =“stm32l4r5zi”)

But my target is not mentioned in

processor is riscv bare metal and there is accelerator.

What should I write in"") inside this c -keys=riscv_cpu,cpu -mcpu=?

Do I need to modify the file and add my device in trans table of riscv_cpu ?