It only converts bit field into string.  It does not need locking.

MFC after:	1 week

(cherry picked from commit 54daceab555cb56765a8d4e63071ea44cd877f53)

- s/segement/segment/

(cherry picked from commit e3080a9cca1b94ded20b42b653b97e49306d94d2)

Remove page zeroing code from consumers and stop specifying
VM_ALLOC_NOOBJ.  In a few places, also convert an allocation loop to
simply use VM_ALLOC_WAITOK.

Similarly, convert vm_page_alloc_domain() callers.

Note that callers are now responsible for assigning the pindex.

Reviewed by:	alc, hselasky, kib
Sponsored by:	The FreeBSD Foundation

(cherry picked from commit a4667e09e6520dc2c4b0b988051f060fed695a91)

ifmedia_ioctl() doesn't handle these requests, and this matches what
xn does.

Sponsored by:	DARPA

(cherry picked from commit 71ba16a0a02f4a3fd56d03e908615a8b5f701ba4)

Multi page rings are mapped using a single hypercall that gets passed
an array of grants to map. One of the grants in the array failing to
map would lead to the failure of the whole ring setup operation, but
there was no cleanup of the rest of the grant maps in the array that
could have likely been created as a result of the hypercall.

Add proper cleanup on the failure path during ring setup to unmap any
grants that could have been created.

This is part of XSA-361.

Sponsored by:	Citrix Systems R&D

(cherry picked from commit 808d4aad1022a2a33d222663b0c9badde30b9d45)

Use an interface compatible with the Linux one so that the user-space
libraries already using the Linux interface can be used without much
modifications.

This allows an open privcmd instance to limit against which domains it
can act upon.

Sponsored by:	Citrix Systems R&D

Use an interface compatible with the Linux one so that the user-space
libraries already using the Linux interface can be used without much
modifications.

This allows user-space to make use of the dm_op family of hypercalls,
which are used by device models.

Sponsored by:	Citrix Systems R&D

The interface is mostly the same as the Linux ioctl, so that we don't
need to modify the user-space libraries that make use of it.

The ioctl is just a proxy for the XENMEM_acquire_resource hypercall.

Sponsored by:	Citrix Systems R&D

Preparatory change for further additions that will also make use of
the same code. No functional change.

Sponsored by:	Citrix Systems R&D

There's no reason for them to be signed. No functional change.

Sponsored by:	Citrix Systems R&D