wang

frm is illegal value , a vector fp inst raise illegal inst but it still will make vs dirty

1

for vector fp inst，now spike check require vector first and then require_vector first and then requre frm。 in require vector it will dirty vs。 so if frm is illegal now...

add hlvx pmp protect to fix issue 1557

3

for fix issue #1557, add hlvx check x check for pmp

for vleff inst take breakpoint on not first element，does it need report breakpoint？

priority between LCOFI and vs interrupt ?

2

in this issue https://github.com/riscv/riscv-isa-manual/issues/1678 spec said the locfi is lower than vs interrupt. but now spike is still higher than vs interrupt.  does it need to change ?