NHMEX_M_PMON_ZDP_CTL_FVC_EVENT_MASK
mask |= NHMEX_M_PMON_ZDP_CTL_FVC_EVENT_MASK(idx);
NHMEX_M_PMON_ZDP_CTL_FVC_EVENT_MASK(idx);
config &= NHMEX_M_PMON_ZDP_CTL_FVC_EVENT_MASK(idx);