Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.
Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/
Sponsored by: Netflix
The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.
Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix
The number is public and has no "entropy," but should be integrated quickly
on VM rewind events to avoid duplicate sequences.
Approved by: csprng(markm)
Differential Revision: https://reviews.freebsd.org/D22946
The VM generation counter is a 128-bit value exposed by the BIOS via ACPI.
The value changes to another unique identifier whenever a VM is duplicated.
Additionally, ACPI provides notification events when such events occur.
The driver decodes the pointer to the UUID, exports the value to userspace
via OPAQUE sysctl blob, and forwards the ACPI notifications in the form of
an EVENTHANDLER invocation as well as userspace devctl events.
See design paper: https://go.microsoft.com/fwlink/p/?LinkID=260709
