struct checkpoint_op, enum checkpoint_opcodes, and
MAX_SNAPSHOT_VMNAME are not vmm specific, move them out of the vmmapi
header.

They are used for the save/restore functionality that bhyve(8)
provides and are better suited in usr.sbin/bhyve/snapshot.h

Since bhyvectl(8) requires these, the Makefile for bhyvectl has been
modified to include usr.sbin/bhyve/snapshot.h

Reviewed by:    kevans, grehan
Differential Revision:  https://reviews.freebsd.org/D28410

This macro returns true if a provided virtual address is contained
in the kernel's clean submap.

In CHERI kernels, the buffer cache and transient I/O map are allocated
as separate regions.  Abstracting this check reduces the diff relative
to FreeBSD.  It is perhaps slightly more readable as well.

Reviewed by:	kib
Obtained from:	CheriBSD
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D28710

-ffile-prefix-map=<old>=<new> is a compiler feature first added in
GCC 8, and implemented for clang 10. It remaps old paths to new paths
in both debug information and __FILE__ and __BASE_FILE__ macros. It can
be used to improve reproducibility or to hide local system directories.

I intend to use it to replace the real source directory and real object
directory with constant values across all builds.

Reviewed by:	brooks
Differential Revision:	https://reviews.freebsd.org/D28632

ACPI Sec 5.2.16.5 (SRAT, GIC Interrupt Translation Service (ITS)
Affinity Structure) says:

> The GIC ITS Affinity Structure provides the association between
> a GIC ITS and a proximity domain. This enables the OSPM to
> discover the memory that is closest to the ITS, and use that in
> allocating its management tables and command queue.

Previously the ITS driver was using the proximity domain to
restrict which CPUs can be targeted by an LPI. We keep that logic
just for the original dual socket ThunderX which cannot forward
LPIs between sockets.

We also use the SRAT entry for its intended purpose of attempting
to allocate ITS table structures near the ITS.

Reviewed by:	andrew
Sponsored by:	Ampere Computing LLC
Differential Revision:	https://reviews.freebsd.org/D28340

These errors do not clear so to NULL, so the existing check was
treating these failures as success.  The rest of do_pass_establish()
then tried to use the listen socket as if it was a connection socket
newly created by syncache_expand().

In addition, for negative return values, do not send a RST to the
peer.

Reported by:	Sony Arpita Das @ Chelsio
Reviewed by:	np
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D28243

The fallback for __align_up() used by roundup2() uses __typeof__()
which doesn't work for bitfields.  This fixes the build on GCC which
uses the fallback.

Reviewed by:	arichardson, markj
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D28599