Hypervisor call
This instruction causes an exception to EL2. Software executing at EL1 can use this instruction to call the hypervisor to request a service.
The HVC instruction is UNDEFINED:
On executing an HVC instruction, the PE records the exception as a Hypervisor Call exception in ESR_ELx, using the EC syndrome value 0x16, and the value of the immediate argument.
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 1 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | imm16 | 0 | 0 | 0 | 1 | 0 | |||||||||||||||
| opc | op2 | LL | |||||||||||||||||||||||||||||
if !HaveEL(EL2) then EndOfDecode(Decode_UNDEF); end; let imm : bits(16) = imm16;
if PSTATE.EL == EL0 then Undefined(); end; if PSTATE.EL == EL1 && !EL2Enabled() then Undefined(); end; if !HaveEL(EL3) && HCR_EL2().HCD == '1' then Undefined(); end; if HaveEL(EL3) && SCR_EL3().HCE == '0' then Undefined(); end; AArch64_CallHypervisor(imm);
2026-03_rel 2026-03-26 20:48:11
Copyright © 2010-2026 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.