qtest: use qemu_gettimeofday()

On linux, qemu_timeval will always be two long ints.  On windows, we use our
own struct definition.  This should fix win64.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
serial: fix retry logic

I'm not sure if the retry logic has ever worked when not using FIFO mode.  I
found this while writing a test case although code inspection confirms it is
definitely broken.

The TSR retry logic will never actually happen because it is guarded by an
'if (s->tsr_rety > 0)' but this is the only place that can ever make the
variable greater than zero.  That effectively makes the retry logic an 'if (0)'.

I believe this is a typo and the intention was >= 0.  Once this is fixed though,
I see double transmits with my test case.  This is because in the non FIFO
case, serial_xmit may get invoked while LSR.THRE is still high because the
character was processed but the retransmit timer was still active.

We can handle this by simply checking for LSR.THRE and returning early.  It's
possible that the FIFO paths also need some attention.

Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
serial: clear LSR.TEMT when populating the TSR

We never actually clear the TEMT (transmit sending register empty) flag when
populating the TSR.  We set the flag, but since it's never cleared, setting it
is sort of pointless..

I found this with a unit test case.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Merge remote-tracking branch 'stefanha/tracing' into staging

* stefanha/tracing:
  tracetool: dtrace: handle in and next reserved words
  tracetool: dtrace disabled-events fix
  Makefile.target: code stp dependency on trace-events
Merge remote-tracking branch 'kiszka/queues/slirp' into staging

* kiszka/queues/slirp:
  slirp: Signal free input buffer space to io-thread
  w32/slirp: Undefine error constants before their redefinition
  slirp: use socket_set_nonblock
  slirp: clean up conflicts with system headers
qom: add container_get

This is QOM "mkdir -p".  It is useful when referring to
container objects such as "/machine".

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
qdev: add children before qdev_init

We want the composition tree to to be in order by the time we call
qdev_init, so that a single set of the toplevel realize property can
propagate all the way down the composition tree.

This is not the case so far.  Unfortunately, this is incompatible
with calling qdev_init in the constructor wrappers for devices,
so for now we need to unattach some devices that are created through
those wrappers.  This will be fixed by removing qdev_init and instead
setting the toplevel realize property after machine init.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
qdev: give all devices a canonical path

A strong limitation of QOM right now is that unconverted ports
(e.g. all...) do not give a canonical path to devices that are
part of the board.  This in turn makes it impossible to replace
PROP_PTR with a QOM link for example.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
qdev: put all devices under /machine

Avoid cluttering too much the QOM root.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>