Hi, This series aims to optimize KVM nested-VPID implementation. Note: All the patches in this series are indepdendent and can be applied seperately. 1st patch is just a small refactoring change. 2nd patch fixes a corner-case of not failing INVVPID type 0 (individiual-address) in case operand.vpid==0. 3rd patch fixes an ancient issue of unnecessarely flushing TLB when exiting from L2 to L1 even though TLB entries populated by L2 are tagged with different VPID (vmx->nested.vpid02) than TLB entries populated by L1 (vmx->vpid). 4rd patch optimizes L1 INVVPID type 0 (individiual-address) handling by emulating it with INVVPID type 0 executed at L0 level. This allows flushing only a single TLB entry tagged with vmx->nested.vpid02 instead of all TLB entries tagged with vmx->nested.vpid02. Regards, -Liran Alon
