SYS_APDBKEYLO_EL1 36 arch/arm64/include/asm/kvm_ptrauth.h mrs_s \reg1, SYS_APDBKEYLO_EL1 SYS_APDBKEYLO_EL1 55 arch/arm64/include/asm/kvm_ptrauth.h msr_s SYS_APDBKEYLO_EL1, \reg1