global to per-domain state.  Protect reservations with the free lock
from the domain that they belong to.  Refactor to make vm domains more
of a first class object.

Reviewed by:    markj, kib, gallatin
Tested by:      pho
Sponsored by:   Netflix, Dell/EMC Isilon
Differential Revision:  https://reviews.freebsd.org/D14000

of booted status.

o Call uma_startup1() after initializing kmem, vmem and domains.
o Include 8 eight VM startup pages into uma_startup_count() calculation.
o Account for vmem_startup() and vm_map_startup() preallocating pages.
o Account for extra two allocations done by kmem_init() and vmem_create().
o Hardcode the place of execution of vm_radix_reserve_kva(). Using SYSINIT
  allowed several other SYSINITs to sneak in before it, thus bumping
  requirement for amount of boot pages.

If any process creates a directory named "-P" in /var/run or
/var/spool/lock it will cause the purgedir function to start to rm -r /.

Simplify a lot of complicated shell logic by leveraging find(1).

Reviewed by:	allanjude
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D13778

a bit in the normal operation of the driver.  Covert it to represent bytes
instead of 32bit words.  Fix what I believe to be is a bug in this respect
with the Tri-mode cards.

Sponsored by:	Netflix

The firstboot logic has an error which causes the filesystem to be
mounted readonly even though root_rw_mount=YES. This fixes the error to
ensure that the root filesystem is mounted rw as expected after the run
of the firstboot scripts.

Reviewed by:	imp
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D14226

The MIPS assembly parser treats forward-declared local symbols as global
symbols.  This results in CALL16 relocations being used against local
(private) symbols which then fail to resolve when linking binaries.
Add .local to force the init and fini functions to be treated as local as
a workaround.

Submitted by:	sbruno
Sponsored by:	DARPA / AFRL

Since synchronization reads are performed by submitting a request to
the external mirror provider, we know that the request returns with an
error only when gmirror was unable to read a copy of the block from any
mirror. Thus, there is no need to retry the request from the
synchronization error handler.

Tested by:	pho
MFC after:	2 weeks
Sponsored by:	Dell EMC Isilon

Both drivers were found to report CAM bigger queue depth then they really
can handle.  It made them later under high load with many disks return
some of submitted requests back with CAM_REQUEUE_REQ status for later
resubmission.

Reviewed by:	scottl
MFC after:	1 week
Sponsored by:	iXsystems, Inc.
Differential Revision:	https://reviews.freebsd.org/D14215

In mp{r,s}_diag_register(), which is used to register diagnostic
buffers with the mp{r,s}(4) firmware, we allocate DMAable memory.

There were several issues here:
 o No checking of the bus_dmamap_load() return value.  If the load
   failed or got deferred, mp{r,s}_diag_register() continued on as if
   nothing had happened.  We now check the return value and bail
   out if it fails.

 o No waiting for a deferred load callback.  bus_dmamap_load()
   calls a supplied callback when the mapping is done.  This is
   generally done immediately, but it can be deferred.
   mp{r,s}_diag_register() did not check to see whether the callback
   was already done before proceeding on.  We now sleep until the
   callback is done if it is deferred.

 o No call to bus_dmamap_sync(... BUS_DMASYNC_PREREAD) after the
   memory is allocated and loaded.  This is necessary on some
   platforms to synchronize host memory that is going to be updated
   by a device.

Both drivers would also panic if the firmware was reinitialized while
a diagnostic buffer operation was in progress.  This fixes that problem
as well.  (The driver will reinitialize the firmware in various
circumstances, but the problem I ran into was that the firmware would
generate an IOC Fault due to a PCIe error.)

mp{r,s}var.h:
	Add a new structure, struct mpr_busdma_context, that is
	used for deferred busdma load callbacks.

	Add a prototype for mp{r,s}_memaddr_wait_cb().
mp{r,s}.c:
	Add a new busdma callback function, mp{r,s}_memaddr_wait_cb().
	This provides synchronization for callers that want to
	wait on a deferred bus_dmamap_load() callback.

mp{r,s}_user.c:
	In bus_dmamap_register(), add a call to bus_dmamap_sync()
	with the BUS_DMASYNC_PREREAD flag set after an allocation
	is loaded.

	Also, check the return value of bus_dmamap_load().  If it
	fails, bail out.  If it is EINPROGRESS, wait for the
	callback to happen.  We use an interruptible sleep (msleep
	with PCATCH) and let the callback clean things up if we get
	interrupted.

	In mpr_diag_read_buffer() and mps_diag_read_buffer(), call
	bus_dmamap_sync(..., BUS_DMASYNC_POSTREAD) before copying
	the data out to make sure the data is in stable storage.

	In mp{r,s}_post_fw_diag_buffer() and
	mp{r,s}_release_fw_diag_buffer(), check the reply to see
	whether it is NULL.  It can be NULL (and the command non-NULL)
	if the controller gets reinitialized while we're waiting for
	the command to complete but the driver structures aren't
	reallocated.  The driver structures generally won't be
	reallocated unless there is a firmware upgrade that changes
	one of the IOCFacts.

	When freeing diagnostic buffers in mp{r,s}_diag_register()
	and mp{r,s}_diag_unregister(), zero/NULL out the buffer after
	freeing it.  This will prevent a duplicate free in some
	situations.

Sponsored by:	Spectra Logic
Reviewed by:	mav, scottl
MFC after:	1 week
Differential Revision:	D13453

Linux /usr/bin/find doesn't understand the -mtime -0s flag.
Instead create a temporary file and compare that file's mtime to
sys/sys/param.h to check whether the clock is correct.

Reviewed By:	jhb, imp
Approved By:	jhb (mentor)
Differential Revision: https://reviews.freebsd.org/D14157

It won't work e.g. when crossbuilding from Ubuntu Linux as mktemp is in
/bin there.

Reviewed By:	bdrewery
Approved By:	jhb (mentor)
Differential Revision: https://reviews.freebsd.org/D13937

When building FreeBSD the makefiles invoke find with various flags such as
`-s` that aren't supported in the native /usr/bin/find. To fix this I
build the FreeBSD version of find and use that when crossbuilding.

Inserting lots if #ifdefs in the code is rather ugly but I don't see a
better solution.

Reviewed By:	brooks (mentor)
Approved By:	jhb (mentor)
Differential Revision: https://reviews.freebsd.org/D13306

The compiler/linker can align fake_preload anyway it would like. When
building the kernel with gcc+bfd this always happened to be a multiple of 8.
When I built the kernel with clang and linked with lld fake_preload
happened to only be aligned to 4 bytes which caused a an ADDRS trap because
the compiler will emit sd instructions to store to this buffer.

Reviewed By:	jhb, imp
Approved By:	jhb (mentor)
Differential Revision: https://reviews.freebsd.org/D14018

Approved by:	cy
MFC after:	2 weeks (along with 328331 which introduced this option)
Differential Revision:	https://reviews.freebsd.org/D14028

FreeBSD boots on this board, but the ethernet switch is not currently
supported, resulting in no ethernet.

A U-Boot port will be added once the ethernet switch is at least basically
supported, but we add its DTS to the build here to lower the barrier-to-boot
while work is underway.

has been switched to libedit long ago, libreadline was built as an
internallib for a while and kept only for gdbtui which was broken using
libreadline.

Since gdb has been mostly deorbitted in all arches, gdbtui was only installed
on arm and sparc64, given it has been removed, gdb has been switched to use
libedit, no consumers are left for libreadline. Thus this removal

only installed on arm and sparc64.
It is the only bits that keeps us having libreadline in base
The rest of gdb can be switched to libedit and will be in another
commit

The placeholders are here for some future "set" MAC address API.

Tested:

* AR9340 switch
* AR8327 switch

Switches that originate their own frames (eg obvious ones like Pause frames)
need a MAC address to use to send those frames from.

This API will hopefully begin to allow that to be configurable.

SGList elements, but there's only enough space in the request frame for
either 1 element or a chain frame pointer.  Previously, the code would
hit the wrong case, add the SGList element, but then fail to add the
chain frame due to lack of space.  Re-arrange the code to catch this case
earlier and handle it.

Sponsored by:	Netflix

There's no compelling reason to return a cam_status type for this
function and doing so only creates confusion with normal C
coding practices. It's technically an API change, but the periph API
isn't widely used. No efffective change to operation.

Reviewed by:	imp, mav, ken
Sponsored by:	Netflix
Differential Revision:	D14063

Reviewed by:	jhb
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D14188

for UMA startup.

o Introduce another stage of UMA startup, which is entered after
  vm_page_startup() finishes. After this stage we don't yet enable buckets,
  but we can ask VM for pages. Rename stages to meaningful names while here.
  New list of stages: BOOT_COLD, BOOT_STRAPPED, BOOT_PAGEALLOC, BOOT_BUCKETS,
  BOOT_RUNNING.
  Enabling page alloc earlier allows us to dramatically reduce number of
  boot pages required. What is more important number of zones becomes
  consistent across different machines, as no MD allocations are done before
  the BOOT_PAGEALLOC stage. Now only UMA internal zones actually need to use
  startup_alloc(), however that may change, so vm_page_startup() provides
  its need for early zones as argument.
o Introduce uma_startup_count() function, to avoid code duplication. The
  functions calculates sizes of zones zone and kegs zone, and calculates how
  many pages UMA will need to bootstrap.
  It counts not only of zone structures, but also of kegs, slabs and hashes.
o Hide uma_startup_foo() declarations from public file.
o Provide several DIAGNOSTIC printfs on boot_pages usage.
o Bugfix: when calculating zone of zones size use (mp_maxid + 1) instead of
  mp_ncpus. Use resulting number not only in the size argument to zone_ctor()
  but also as args.size.

Reviewed by:		imp, gallatin (earlier version)
Differential Revision:	https://reviews.freebsd.org/D14054

systems running with a heavy filesystem load. Tracking down this
bug was elusive because there were actually two problems. Sometimes
the in-memory check hash was wrong and sometimes the check hash
computed when doing the read was wrong. The occurrence of either
error caused a check-hash mismatch to be reported.

The first error was that the check hash in the in-memory cylinder
group was incorrect. This error was caused by the following
sequence of events:

- We read a cylinder-group buffer and the check hash is valid.
- We update its cg_time and cg_old_time which makes the in-memory
  check-hash value invalid but we do not mark the cylinder group dirty.
- We do not make any other changes to the cylinder group, so we
  never mark it dirty, thus do not write it out, and hence never
  update the incorrect check hash for the in-memory buffer.
- Later, the buffer gets freed, but the page with the old incorrect
  check hash is still in the VM cache.
- Later, we read the cylinder group again, and the first page with
  the old check hash is still in the VM cache, but some other pages
  are not, so we have to do a read.
- The read does not actually get the first page from disk, but rather
  from the VM cache, resulting in the old check hash in the buffer.
- The value computed after doing the read does not match causing the
  error to be printed.

The fix for this problem is to only set cg_time and cg_old_time as
the cylinder group is being written to disk. This keeps the in-memory
check-hash valid unless the cylinder group has had other modifications
which will require it to be written with a new check hash calculated.
It also requires that the check hash be recalculated in the in-memory
cylinder group when it is marked clean after doing a background write.

The second problem was that the check hash computed at the end of the
read was incorrect because the calculation of the check hash on
completion of the read was being done too soon.

- When a read completes we had the following sequence:

  - bufdone()
  -- b_ckhashcalc (calculates check hash)
  -- bufdone_finish()
  --- vfs_vmio_iodone() (replaces bogus pages with the cached ones)

- When we are reading a buffer where one or more pages are already
  in memory (but not all pages, or we wouldn't be doing the read),
  the I/O is done with bogus_page mapped in for the pages that exist
  in the VM cache. This mapping is done to avoid corrupting the
  cached pages if there is any I/O overrun. The vfs_vmio_iodone()
  function is responsible for replacing the bogus_page(s) with the
  cached ones. But we were calculating the check hash before the
  bogus_page(s) were replaced. Hence, when we were calculating the
  check hash, we were partly reading from bogus_page, which means
  we calculated a bad check hash (e.g., because multiple pages have
  been mapped to bogus_page, so its contents are indeterminate).

The second fix is to move the check-hash calculation from bufdone()
to bufdone_finish() after the call to vfs_vmio_iodone() so that it
computes the check hash over the correct set of pages.

With these two changes, the occasional cylinder-group check-hash
errors are gone.

Submitted by: David Pfitzner <dpfitzner@netflix.com>
Reviewed by: kib
Tested by: David Pfitzner

Similar to other arches, the move makes the subject of locore.s only
the kernel startup.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

- Remove the shim interface that allowed bwn(4) to use either siba_bwn or
  bhnd(4), replacing all siba_bwn calls with their bhnd(4) bus equivalents.
- Drop the legay, now-unused siba_bwn bus driver.
- Clean up bhnd(4) board flag defines referenced by bwn(4).

Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D13518

As a followup to r328101, ignore relocation tables for ELF object
sections that are not memory resident.  For modules loaded by the
loader, ignore relocation tables whose associated section was not
loaded by the loader (sh_addr is zero).  For modules loaded at runtime
via kldload(2), ignore relocation tables whose associated section is
not marked with SHF_ALLOC.

Reported by:	Mori Hiroki <yamori813@yahoo.co.jp>, adrian
Tested on:	mips, mips64
MFC after:	1 month
Sponsored by:	DARPA / AFRL

If a brand provides a header_supported hook, check it when trying to
find a brand based on a matching interpreter as well as in the final
loop for the fallback brand. Previously a brand might reject a binary
via a header_supported hook in one of the earlier loops, but still be
chosen by one of these later loops.

Reviewed by:	kib
Obtained from:	CheriBSD
MFC after:	2 weeks
Sponsored by:	DARPA / AFRL
Differential Revision:	https://reviews.freebsd.org/D13945

I'll have to go double check to see if it does indeed pass ARP frames between
switch ports with this disabled, but it seems required for the CPU port to see
ARP traffic.

I'll dig into this some more.

Apparently the last time I checked building this it didn't pick up that the
header had changed.

Reviewed by:	rwatson
Obtained from:	CheriBSD
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D14173

Reviewed by:	rwatson
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D14172

Don't declare some types that FreeBSD incorrectly declares.

Fix an incorrect call to open() (missing mode).

ANSIfy prototypes.

Enable SysV message queue, semaphore, and shared memory tests.

With exception of the workaround for union semun, these fixes have been
committed to NetBSD.

Reviewed by:	asomers
Approved by:	CheriBSD
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D13471