mvien[1]

[Mei-x-l]

1.mvien[1] =0 , external interrupt controller give a intrrupt setting mip.ssip = 1
2.should mvip.ssip[1] change from 0 to 1 ?

[jhauser-us]

The AIA document in Section 5.3, "Interrupt filtering and virtual interrupts for supervisor level", says,

When bit 1 of mvien is zero, bit 1 of mvip is an alias of the same bit (SSIP) of mip.

So when mvien[1] = 0, mip.SSIP and mvip.SSIP are two views of the same bit. If mip.SSIP changes, mvip.SSIP obviously also changes, as they are actually the same bit.