arm64/vmm: Teach vmm_arm.c about VHE

Most of the code is identical however some, e.g. managing EL2 memory
or setting EL2 registers, are unneeded under VHE as the kernel is in
EL2 so can manage these

arm64/vmm: Teach vmm_arm.c about VHE

Most of the code is identical however some, e.g. managing EL2 memory
or setting EL2 registers, are unneeded under VHE as the kernel is in
EL2 so can manage these directly.

Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D46076

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arm64/vmm: Create functions to call into EL2

These will become ifuncs to enable VHE in a later change.

Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D46075

arm64/vmm: Teach the vtimer about VHE

Teach the virtual timer about the cnthctl_el2 field layout under VHE.
As with non-VHE we need to trap the physical timer and not trap the
virtual timer.

Sponso

arm64/vmm: Teach the vtimer about VHE

Teach the virtual timer about the cnthctl_el2 field layout under VHE.
As with non-VHE we need to trap the physical timer and not trap the
virtual timer.

Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D46074

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arm64/vmm: Move nVHE-only code to the new file

There are some functions that are only needed in non-VHE mode. These
are used to handle hypervisor calls from the kernel, and to manage the
page tables

arm64/vmm: Move nVHE-only code to the new file

There are some functions that are only needed in non-VHE mode. These
are used to handle hypervisor calls from the kernel, and to manage the
page tables in EL2. As these won't be used by the VHE code we can move
them to the non-VHE specific files.

Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D46073

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arm64/vmm: Start to extract code not needed by VHE

We can share some of the vmm code between VHE and non-VHE modes. To
support this create new files that include the common code and create
macros to

arm64/vmm: Start to extract code not needed by VHE

We can share some of the vmm code between VHE and non-VHE modes. To
support this create new files that include the common code and create
macros to name what will be the common functions.

Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D46072

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