>>> On 21.09.16 at 17:30, <tamas.leng...@zentific.com> wrote: > What I'm saying is that the guest OS should be in charge of managing > its own TLB when VPID is in use. Whether it does flush the TLB or not > is not of our concern. If it's a sane OS it will likely flush when it > needs to, but we should not be jumping in and doing it as we do right > now. We are actually breaking the architectural behavior by forcing a > flush, MOV-TO-CR3 doesn't by itself flush the TLB on real hardware.
I continue to not understand where you take this from. Writes to CR3 have always been doing TLB flushes - full ones prior to the introduction of global pages, and flushes of only non-global entries nowadays. In fact prior to the introduction of INVLPG and CR4 there was no other way to flush TLBs. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
