KVM/arm64-specific hypercalls exposed to guests¶
This file documents the KVM/arm64-specific hypercalls which may be exposed by KVM/arm64 to guest operating systems. These hypercalls are issued using the HVC instruction according to version 1.1 of the Arm SMC Calling Convention (DEN0028/C):
https://developer.arm.com/docs/den0028/c
All KVM/arm64-specific hypercalls are allocated within the “Vendor
Specific Hypervisor Service Call” range with a UID of
28b46fb6-2ec5-11e9-a9ca-4b564d003a74. This UID should be queried by the
guest using the standard “Call UID” function for the service range in
order to determine that the KVM/arm64-specific hypercalls are available.
ARM_SMCCC_VENDOR_HYP_KVM_FEATURES_FUNC_ID¶
Provides a discovery mechanism for other KVM/arm64 hypercalls.
Presence: |
Mandatory for the KVM/arm64 UID |
||
Calling convention: |
HVC32 |
||
Function ID: |
(uint32) |
0x86000000 |
|
Arguments: |
None |
||
Return Values: |
(uint32) |
R0 |
Bitmap of available function numbers 0-31 |
(uint32) |
R1 |
Bitmap of available function numbers 32-63 |
|
(uint32) |
R2 |
Bitmap of available function numbers 64-95 |
|
(uint32) |
R3 |
Bitmap of available function numbers 96-127 |
|