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I can access ICC_IAR1_EL1 at EL3 using SP_EL0, however, after I switch EL3 to EL1 non-secure, I can't read IIC_IAR1_EL1 anymore, which doesn't make sense.
Can anybody help here? much appreciated.
__func__011000 EC=MSR, MRS, or System instruction, that isn't reported using EC 0x00/0x01/0x07Unhandled exception 0x18(24) from CA72_0 to CA72_0EXC number:0x00000018EXC class: 0x00000018FaultReg: 0x00000000StatusPrg: 0x80000005PC: 0x00000000 0xA0007F78 FaultReg: 0xD538CC00StatusPrg: 0x00303019Exception class is MSR_MRS These report exceptions from MSR, MRS, or System instructions Instruction syndrome MSR/MRS: Op0: 0x00000000Op2: 0x00000000Op1: 0x00000000CRn: 0x00000000Rt : 0x00000000CRm: 0x00000018dir: 0x00000001
Hi Martin,
Thanks very much for your great help!!