XSCALE2_COUNT2_EVT_SHFT
#define XSCALE2_COUNT2_EVT_MASK (0xff << XSCALE2_COUNT2_EVT_SHFT)
evtsel |= hwc->config_base << XSCALE2_COUNT2_EVT_SHFT;
evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT2_EVT_SHFT;