On Sunday, 2018-03-11, Wanpeng Li <kernellwp@xxxxxxxxx> wrote: > 2018-03-06 4:04 GMT+08:00 Sean Christopherson <sean.j.christopherson@xxxxxxxxx>: > > This series eliminates usage of legacy code that is obsolete when > > unrestricted guest is enabled. > > > > Because unrestricted guest (Westmere) was introduced one generation > > later than EPT (Nehalem), KVM's initial support for EPT by necessity > > retained/introduced soon-to-be-legacy code for handling a guest with > > EPT enabled and CR0.PG/PE==0. Some of this now-legacy code/behavior > > wasn't correctly deprecated when KVM added support for unrestricted > > guest, e.g. KVM still creates and loads identity mapped IA32 page > > tables when the guest disables paging, even though CR0.PG is cleared > > in hardware. > > Thanks for the patchset, in addition, I think A20 emulation is still > missing for vm8086. Missing in the sense that you want to be able to emulate A20M behavior in KVM, i.e. run a guest with A20M asserted? > Regards, > Wanpeng Li
