diff options
Diffstat (limited to 'Documentation/virt/kvm/arm/hyp-abi.rst')
| -rw-r--r-- | Documentation/virt/kvm/arm/hyp-abi.rst | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/Documentation/virt/kvm/arm/hyp-abi.rst b/Documentation/virt/kvm/arm/hyp-abi.rst index d9eba93aa364..412b276449d3 100644 --- a/Documentation/virt/kvm/arm/hyp-abi.rst +++ b/Documentation/virt/kvm/arm/hyp-abi.rst @@ -54,9 +54,19 @@ these functions (see arch/arm{,64}/include/asm/virt.h): 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. + +* :: + + x0 = HVC_FINALISE_EL2 (arm64 only) + + Finish configuring EL2 depending on the command-line options, + including an attempt to upgrade the kernel's exception level from + EL1 to EL2 by enabling the VHE mode. This is conditioned by the CPU + supporting VHE, the EL2 MMU being off, and VHE not being disabled by + any other means (command line option, for example). Any other value of r0/x0 triggers a hypervisor-specific handling, which is not documented here. |