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>
target-s390x: QOM'ify CPU

Embed CPUS390XState as first member of S390CPU.
Since -cpu is being ignored, make TYPE_S390_CPU non-abstract.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
target-s390x: QOM'ify CPU reset

Move code from cpu_state_reset() to s390_cpu_reset().

Signed-off-by: Andreas Färber <afaerber@suse.de>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
target-s390x: QOM'ify CPU init

Move code from cpu_s390x_init() into an initfn.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
target-s390x: Update s390x_{tod,cpu}_timer() to use S390CPU

In place of CPUS390XState pass S390CPU as opaque from the new initfn.
cpu_interrupt() is anticipated to take a CPUState in the future.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Fix vector interrupt handling

Don't produce stray irq 5, don't overwrite ivec_data if still busy with
processing of the previous interrupt.

Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Improve interrupt handling priority

The vector interrupt has higher priority than interrupt_level_n.
Also check only interrupt_level_n concurency when TL > 0, the traps of
other types may be nested.

Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Merge branch 's390-for-upstream' of git://repo.or.cz/qemu/agraf

* 's390-for-upstream' of git://repo.or.cz/qemu/agraf:
  target-s390x: Update s390x_{tod,cpu}_timer() to use S390CPU
  target-s390x: QOM'ify CPU init
  target-s390x: QOM'ify CPU reset
  target-s390x: QOM'ify CPU