With ARMv8.1 VHE, the architecture is able to (almost) transparently
run the kernel at EL2, despite being written for EL1.
This patch takes care of the "almost" part, mostly preventing the kernel
from dropping from EL2 to EL1, and setting up the HYP configuration.
@@ -521,6 +542,15 @@ CPU_LE( movk x0, #0x30d0, lsl #16 ) // Clear EE and E0E on LE systems
/* Stage-2 translation */
msr vttbr_el2, xzr
+ cbz x2, install_el2_stub
+ setup_vtcr x4, x5
+ mov w20, #BOOT_CPU_MODE_EL2 // This CPU booted in EL2
/* Hypervisor stub */
adrp x0, __hyp_stub_vectors
add x0, x0, #:lo12:__hyp_stub_vectors