CNTHVS_CVAL Counter-timer Secure Virtual Timer CompareValue Register (EL2) when FEAT_AA32 is implemented and FEAT_SEL2 is implemented CNTHVS_CVAL_EL2 Architectural AArch64 63 0 63 0 63 0 63 0 Provides AArch32 access to the compare value for the Secure EL2 virtual timer. Timer CNTHVS_CVAL is a 64-bit register. CompareValue 63 0 63:0 Holds the EL2 virtual timer CompareValue. When CNTHVS_CTL.ENABLE is 1, the timer condition is met when (CNTVCT - CompareValue) is greater than or equal to zero. This means that CompareValue acts like a 64-bit upcounter timer. When the timer condition is met: CNTHVS_CTL.ISTATUS is set to 1. If CNTHVS_CTL.IMASK is 0, an interrupt is generated. When CNTHVS_CTL.ENABLE is 0, the timer condition is not met, but CNTVCT continues to count. If the Generic counter is implemented at a size less than 64 bits, then this field is permitted to be implemented at the same width as the counter, and the upper bits are RES0. The value of this field is treated as zero-extended in all counter calculations. This register is accessed using the encoding for CNTV_CVAL. MRRC{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <Rt2>, <CRm> if !IsFeatureImplemented(FEAT_AA32) then Undefined(); elsif PSTATE.EL == EL0 then if IsFeatureImplemented(FEAT_AA64EL1) && !ELUsingAArch32(EL1) && !ELIsInHost(EL0) && CNTKCTL_EL1().EL0VTEN == '0' then if EL2Enabled() && (IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2)) && HCR_EL2().TGE == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x04); else AArch64_AArch32SystemAccessTrap(EL1, 0x04); end; elsif IsFeatureImplemented(FEAT_AA32EL1) && ELUsingAArch32(EL1) && CNTKCTL().PL0VTEN == '0' then if EL2Enabled() && (IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2)) && HCR_EL2().TGE == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x04); elsif EL2Enabled() && (IsFeatureImplemented(FEAT_AA32EL2) && ELUsingAArch32(EL2)) && HCR().TGE == '1' then AArch32_TakeHypTrapException(0x00); else Undefined(); end; elsif ELIsInHost(EL0) && (IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2)) && CNTHCTL_EL2().EL0VTEN == '0' then AArch64_AArch32SystemAccessTrap(EL2, 0x04); elsif EL2Enabled() && (IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2)) && !ELIsInHost(EL0) && IsFeatureImplemented(FEAT_ECV) && CNTHCTL_EL2().EL1TVT == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x04); elsif ELIsInHost(EL0) && IsCurrentSecurityState(SS_Secure) && IsFeatureImplemented(FEAT_SEL2) then R(t, t2) = CNTHVS_CVAL_EL2(); elsif ELIsInHost(EL0) && !IsCurrentSecurityState(SS_Secure) then R(t, t2) = CNTHV_CVAL_EL2(); else R(t, t2) = CNTV_CVAL(); end; elsif PSTATE.EL == EL1 then if EL2Enabled() && IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2) && IsFeatureImplemented(FEAT_ECV) && CNTHCTL_EL2().EL1TVT == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x04); else R(t, t2) = CNTV_CVAL(); end; elsif PSTATE.EL == EL2 then R(t, t2) = CNTV_CVAL(); elsif PSTATE.EL == EL3 then R(t, t2) = CNTV_CVAL(); end; MCRR{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <Rt2>, <CRm> if !IsFeatureImplemented(FEAT_AA32) then Undefined(); elsif PSTATE.EL == EL0 then if IsFeatureImplemented(FEAT_AA64EL1) && !ELUsingAArch32(EL1) && !ELIsInHost(EL0) && CNTKCTL_EL1().EL0VTEN == '0' then if EL2Enabled() && (IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2)) && HCR_EL2().TGE == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x04); else AArch64_AArch32SystemAccessTrap(EL1, 0x04); end; elsif IsFeatureImplemented(FEAT_AA32EL1) && ELUsingAArch32(EL1) && CNTKCTL().PL0VTEN == '0' then if EL2Enabled() && (IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2)) && HCR_EL2().TGE == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x04); elsif EL2Enabled() && (IsFeatureImplemented(FEAT_AA32EL2) && ELUsingAArch32(EL2)) && HCR().TGE == '1' then AArch32_TakeHypTrapException(0x00); else Undefined(); end; elsif ELIsInHost(EL0) && (IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2)) && CNTHCTL_EL2().EL0VTEN == '0' then AArch64_AArch32SystemAccessTrap(EL2, 0x04); elsif EL2Enabled() && (IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2)) && !ELIsInHost(EL0) && IsFeatureImplemented(FEAT_ECV) && CNTHCTL_EL2().EL1TVT == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x04); elsif ELIsInHost(EL0) && IsCurrentSecurityState(SS_Secure) && IsFeatureImplemented(FEAT_SEL2) then CNTHVS_CVAL_EL2() = R(t, t2); elsif ELIsInHost(EL0) && !IsCurrentSecurityState(SS_Secure) then CNTHV_CVAL_EL2() = R(t, t2); else CNTV_CVAL() = R(t, t2); end; elsif PSTATE.EL == EL1 then if EL2Enabled() && IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2) && IsFeatureImplemented(FEAT_ECV) && CNTHCTL_EL2().EL1TVT == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x04); else CNTV_CVAL() = R(t, t2); end; elsif PSTATE.EL == EL2 then CNTV_CVAL() = R(t, t2); elsif PSTATE.EL == EL3 then CNTV_CVAL() = R(t, t2); end; 2026-03-26 20:27:25 2026-03_rel