On Mon, Sep 28, 2015 at 02:00:18PM +0200, Paolo Bonzini wrote: > ABM is only implemented as a single instruction set by AMD; all AMD > processors support both instructions or neither. Intel considers POPCNT > as part of SSE4.2, and LZCNT as part of BMI1, but Intel also uses AMD's > ABM flag to indicate support for both POPCNT and LZCNT. It has to be > added to Haswell and Broadwell because Haswell, by adding LZCNT, has > completed the ABM. > > Tested with "qemu-kvm -cpu Haswell-noTSX,enforce" (and also with older > machine types) on an Haswell-EP machine. > > Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Reviewed-by: Eduardo Habkost <ehabk...@redhat.com> Applied to x86 tree, thanks! -- Eduardo
