vmm: Move the module load handler to vmm_dev.c

[markj]

Summary

Move the vmm_initialized check out of vm_create() and into the legacy
sysctl handler. If vmm_initialized is false, /dev/vmmctl will not be
available and so cannot be used to create VMs.

Introduce new MD vmm_init() and vmm_cleanup() routines which handle MD
(de)initialization.

No functional change intended.

[jhb]

In the commit message do you want to vmm_init -> vmm_modinit, etc.? Generally looks fine to me though.

sys/arm64/include/vmm.h

177 ↗

(On Diff #165258)

Can these prototypes go in a single place (<dev/vmm/vmm_dev.h>?)?

[corvink]

sys/amd64/vmm/vmm.c

257

vmm_ipinum is already defined here.

[markj]

In D53421#1220311, @jhb wrote:

In the commit message do you want to vmm_init -> vmm_modinit, etc.? Generally looks fine to me though.

Fixed, thanks.

[markj]

Handle review feedback:

• Move vmm_modinit()/modcleanup() prototypes to vmm_dev.h.
• Remove a stray definition for vmm_ipinum.