Commit 69bf758b authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab Committed by Paolo Bonzini

docs: kvm: convert arm/hyp-abi.txt to ReST

- Add proper markups for titles;
- Adjust whitespaces and blank lines to match ReST
  needs;
- Mark literal blocks as such.
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 106ee47d
* Internal ABI between the kernel and HYP
.. SPDX-License-Identifier: GPL-2.0
=======================================
Internal ABI between the kernel and HYP
=======================================
This file documents the interaction between the Linux kernel and the
hypervisor layer when running Linux as a hypervisor (for example
......@@ -19,25 +23,31 @@ and only act on individual CPUs.
Unless specified otherwise, any built-in hypervisor must implement
these functions (see arch/arm{,64}/include/asm/virt.h):
* r0/x0 = HVC_SET_VECTORS
r1/x1 = vectors
* ::
r0/x0 = HVC_SET_VECTORS
r1/x1 = vectors
Set HVBAR/VBAR_EL2 to 'vectors' to enable a hypervisor. 'vectors'
must be a physical address, and respect the alignment requirements
of the architecture. Only implemented by the initial stubs, not by
Linux hypervisors.
* r0/x0 = HVC_RESET_VECTORS
* ::
r0/x0 = HVC_RESET_VECTORS
Turn HYP/EL2 MMU off, and reset HVBAR/VBAR_EL2 to the initials
stubs' exception vector value. This effectively disables an existing
hypervisor.
* r0/x0 = HVC_SOFT_RESTART
r1/x1 = restart address
x2 = x0's value when entering the next payload (arm64)
x3 = x1's value when entering the next payload (arm64)
x4 = x2's value when entering the next payload (arm64)
* ::
r0/x0 = HVC_SOFT_RESTART
r1/x1 = restart address
x2 = x0's value when entering the next payload (arm64)
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
......
......@@ -7,4 +7,5 @@ ARM
.. toctree::
:maxdepth: 2
hyp-abi
pvtime
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