ID_AA64DFR0_EL1_PMUVER
switch (__SHIFTOUT(id->ac_aa64dfr0, ID_AA64DFR0_EL1_PMUVER)) {
const u_int pmuver = __SHIFTOUT(dfr0, ID_AA64DFR0_EL1_PMUVER);
const u_int pmuver = __SHIFTOUT(dfr0, ID_AA64DFR0_EL1_PMUVER);
const u_int pmuver = __SHIFTOUT(dfr0, ID_AA64DFR0_EL1_PMUVER);