On 08/09/2016 14:13, James Hogan wrote: > These patches fix a couple of problems when using MIPS KVM on a host > kernel with Enhanced Virtual Addressing (EVA) enabled. > > Patch 1 fixes the HVA error codes like s390 does, due to PAGE_OFFSET > potentially being as low as 0. > > Patch 2 allows MMIO to be emulated from TLB refill exceptions as well as > address error exceptions (since EVA configurations may make KSeg1 > addresses TLB mapped to user mode). > > It isn't complete as there are still a couple of cases where KVM tries > to directly access guest memory using normal loads and stores (which > doesn't work with EVA's overlapping usermode & kernel mode address > spaces). That really needs fixing properly anyway to handle the > potential for TLB invalidations (and the resulting refills & page > faults). > > For KVM to work on EVA hosts also requires some MIPS architecture > changes, as found in my recent "MIPS: General EVA fixes & cleanups" > patchset. Since there aren't any overlaps with 4.8 patches, feel free to send a pull request for these and any other patches you might have in the rest of this cycle. Paolo
