reset values of mstatus.mpp and mstatus.spp

[noionion]

Is there a specific requirement for the reset values of mstatus.mpp and mstatus.spp? I found in the Spike code that during initialization, if the U mode exists, mstatus.mpp is set to 0. However, would directly setting it to 2b11 also comply with the specifications?

https://github.com/riscv-software-src/riscv-isa-sim/blob/a2dcf1fd70f359e2cf0a953986c9fe222a6d53c2/riscv/csrs.cc#L566-L577

[pdonahue-ventana]

See https://github.com/riscv/riscv-isa-manual/blob/main/src/machine.adoc#reset for the reset requirements.

[noionion]

It seems that there are indeed no strict requirements...