Right now, the rtld prefork hook locks the rtld bind lock in the read
mode.  This allows the binder to be functional in the child after the
fork (assuming no lazy loading of a filter is needed), but other rtld
services which require write lock on rtld_bind_lock cause deadlock, if
called by child.

Change the _rtld_atfork() to lock the bind lock in write mode, making
the rtld fully functional after the fork.

Pre-resolve the symbols which are called by the libthr' fork()
interposer, since dynamic resolution causes deadlock due to the
rtld_bind_lock already owned in the write mode.

Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Increase taskqueue thread priority from idle to PRIBIO.

Idle priority is not even time-share, so if system is busy in any way,
those events may never be executed.  Since in some cases system waits
for events processed by that thread, that may cause deadlocks.
Make tcp_twrespond() file local private;  this removes it from the
public KPI; it is not used anywhere else and seems it never was.

MFC after:	2 weeks
syncache_lookup() is a file local function.  Make it static and
take it out of the public KPI; seems it was never used elsewhere.

MFC after:	2 weeks
Remove the prototpye for the static inline function
tcp_signature_verify_input().
The function is defined before first use already.

MFC after:	2 weeks
Eliminate one of the causes of spurious interrupts on armv6.  The arm weak
memory ordering model allows writes to different devices to complete out
of order, leading to a situation where the write that clears an interrupt
source at a device can complete after a write that unmasks and EOIs the
interrupt at the interrupt controller, leading to a spurious re-interrupt.

This adds a generic barrier function specific to the needs of interrupt
controllers, and calls that function from the GIC and TI AINTC controllers.
There may still be other soc-specific controllers that need to make the call.

Reviewed by:	cognet, Svatopluk Kraus <onwahe@gmail.com>
MFC after:	3 days
When injecting a page fault into the guest also update the guest's %cr2 to
indicate the faulting linear address.

If the guest PML4 entry has the PG_PS bit set then inject a page fault into
the guest with the PGEX_RSV bit set in the error_code.

Get rid of redundant checks for the PG_RW violations when walking the page
tables.
Consolidate all the information needed by the guest page table walker into
'struct vm_guest_paging'.

Check for canonical addressing in vmm_gla2gpa() and inject a protection
fault into the guest if a violation is detected.

If the page table walk is restarted in vmm_gla2gpa() then reset 'ptpphys' to
point to the root of the page tables.
Untabify.

Found by:	jmmv @
Add a new taskqueue setup method that takes a cpuid to pin the
taskqueue worker thread(s) to.

For now it isn't a taskqueue/taskthread error to fail to pin
to the given cpuid.

Thanks to rpaulo@, kib@ and jhb@ for feedback.

Tested:

* igb(4), with local RSS patches to pin taskqueues.

TODO:

* ask the doc team for help in documenting the new API call.
* add a taskqueue_start_threads_cpuset() method which takes
  a cpuset_t - but this may require a bunch of surgery to
  bring cpuset_t into scope.
Add the clang patch for r265477.  While here, add a description to the
patch for r263619, and unify all the URLs to point to svnweb.
Enable automatic superpages promotion by default on ARMv6/v7

From now on superpages are enabled by default on ARM.
One can still disable superpages utilization by adding:

vm.pmap.sp_enabled=0

to loader.conf
Add libvmmapi functions vm_copyin() and vm_copyout() to copy into and out
of the guest linear address space. These APIs in turn use a new ioctl
'VM_GLA2GPA' to convert the guest linear address to guest physical.

Use the new copyin/copyout APIs when emulating ins/outs instruction in
bhyve(8).
merge libucl 20140514

this version brings xpath-like interface for ucl objects
Update to 20140422
Do the linear address calculation for the ins/outs emulation using a new
API function 'vie_calculate_gla()'.

While the current implementation is simplistic it forms the basis of doing
segmentation checks if the guest is in 32-bit protected mode.
Remove restriction on insb/insw/insl emulation. These instructions are
properly emulated.
Document taskqueue_start_threads_pinned

Requested by:	adrian
Reviewed by:	adrian
Approved by:	hrs (mentor)
X-MFC-with:	r266629
Make SAF1761 driver endian safe.

Sponsored by:	DARPA, AFRL
Document the new -R flag of netstat(1) introduced in r266448 that tracks the
flowid for each socket.

Reviewed by:	adrian
Approved by:	eadler (mentor)