x3 = x1's value when entering the next payload (arm64)
x4 = x2's value when entering the next payload (arm64)
- Mask all exceptions, disable the MMU, move the arguments into place
- (arm64 only), and jump to the restart address while at HYP/EL2. This
- hypercall is not expected to return to its caller.
+ Mask all exceptions, disable the MMU, clear I+D bits, move the arguments
+ into place (arm64 only), and jump to the restart address while at HYP/EL2.
+ This hypercall is not expected to return to its caller.
Any other value of r0/x0 triggers a hypervisor-specific handling,
which is not documented here.