Hypervisor Call 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 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 | |||||||||||||||||||||||||||||
HVC #<imm>
// Empty.
if !HaveEL(EL2) || PSTATE.EL == EL0 || (PSTATE.EL == EL1 && !EL2Enabled()) then UNDEFINED; bits(1) hvc_enable = if HaveEL(EL3) then SCR_EL3.HCE else NOT(HCR_EL2.HCD); if hvc_enable == '0' then UNDEFINED; else AArch64.CallHypervisor(imm16);
Internal version only: aarchmrs v2023-12_rel, pseudocode v2023-12_rel, sve v2023-12_rel ; Build timestamp: 2023-12-15T16:46
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