On Mon, May 20, 2019 at 11:13:36AM +0100, Andy Cooper wrote: > Lightweight Profiling was introduced in Bulldozer (Fam15h), but was dropped > from Zen (Fam17h) processors. Furthermore, LWP was dropped from Fam15/16 CPUs > when IBPB for Spectre v2 was introduced in microcode, owing to LWP not being > used in practice. > > As a result, CPUs which are operating within specification (i.e. with up to > date microcode) no longer have this feature, and therefore are not using it. > > Drop support from Xen. The main motivation here is to remove unnecessary > complexity from CPUID handling, but it also tidies up the SVM code nicely. > > Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com> Acked-by: Brian Woods <brian.wo...@amd.com>
I've confirmed with HW engineers that it's going away. -- Brian Woods _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
