APDAKeyLo

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APDAKeyLo_EL1, Pointer Authentication Key A for Data (bits[63:0])

Purpose

Configuration

This register is present only when FEAT_PAuth is implemented and FEAT_AA64 is implemented. Otherwise, direct accesses to APDAKeyLo_EL1 are UNDEFINED.

Attributes

Field descriptions

APDAKeyLo, bits [63:0]

Accessing APDAKeyLo_EL1

Accesses to this register use the following encodings in the System register encoding space:

MRS <Xt>, APDAKeyLo_EL1

op0	op1	CRn	CRm	op2
0b11	0b000	0b0010	0b0010	0b000

if !(IsFeatureImplemented(FEAT_PAuth) && IsFeatureImplemented(FEAT_AA64)) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && SCR_EL3().APK == '0' then Undefined(); elsif EL2Enabled() && HCR_EL2().APK == '0' then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT) && (!HaveEL(EL3) || SCR_EL3().FGTEn == '1') && HFGRTR_EL2().APDAKey == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && SCR_EL3().APK == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else X{64}(t) = APDAKeyLo_EL1(); end; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && SCR_EL3().APK == '0' then Undefined(); elsif HaveEL(EL3) && SCR_EL3().APK == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else X{64}(t) = APDAKeyLo_EL1(); end; elsif PSTATE.EL == EL3 then X{64}(t) = APDAKeyLo_EL1(); end;

MSR APDAKeyLo_EL1, <Xt>

op0	op1	CRn	CRm	op2
0b11	0b000	0b0010	0b0010	0b000

if !(IsFeatureImplemented(FEAT_PAuth) && IsFeatureImplemented(FEAT_AA64)) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && SCR_EL3().APK == '0' then Undefined(); elsif EL2Enabled() && HCR_EL2().APK == '0' then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT) && (!HaveEL(EL3) || SCR_EL3().FGTEn == '1') && HFGWTR_EL2().APDAKey == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && SCR_EL3().APK == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else APDAKeyLo_EL1() = X{64}(t); end; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && SCR_EL3().APK == '0' then Undefined(); elsif HaveEL(EL3) && SCR_EL3().APK == '0' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else APDAKeyLo_EL1() = X{64}(t); end; elsif PSTATE.EL == EL3 then APDAKeyLo_EL1() = X{64}(t); end;

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APDAKeyLo
APDAKeyLo