Carsten Otte wrote: > Avi Kivity wrote: >> Every arch except s390 needs it. An ugly #ifndef >> CONFIG_KVM_HARDWARE_TLB_SYNC is preferred to duplicating the code. > BTW, from reading AMDs spec I don't expect NPT to need this vehicle > for swapping either. They can just let core-vm page out guest pages > and will receive a proper page fault in the host. Jörg can you confirm > that? >
No, that doesn't work: - even though npt can use the same pagetable for guest and host, that isn't workable for kvm as npt doesn't have an offset/size thing. so kvm uses a separate pagetable for guest and host. - npt doesn't have a dual-tagged tlb, where a host tlb invalidate also invalidates all guest tlbs that point to the same page Try again in 25 years, maybe x86 will reach where s390 is now by that timeframe. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
