linux-user: pass correct host flags to accept4()

Flags NONBLOCK and CLOEXEC can have different values on the host and the
guest, so set correct host values before calling accept4().

This fixes several issues with accept4 system call and user-mode of QEMU.

Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
bswap: Fix build on FreeBSD 10.0

FreeBSD 10.0-RELEASE has bswap16() etc. macros defined in sys/endian.h,
which leads to a conflict with our static inline definitions.

Force using the system version of the macros.

Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Tested-by: Ed Maste <emaste@freebsd.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Merge remote-tracking branch 'remotes/riku/for-2.0' into staging

* remotes/riku/for-2.0:
  linux-user: pass correct host flags to accept4()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Update version for v2.0.0-rc1 release

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
qemu-option: introduce qemu_find_opts_singleton

Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
vl: convert -m to QemuOpts

Adds option to -m
 "size" - startup memory amount

For compatibility with legacy CLI if suffix-less number is passed,
it assumes amount in Mb.

Otherwise user is free to use suffixed number using suffixes b,k/K,M,G

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
object_add: allow completion handler to get canonical path

Add object to /objects before calling user_creatable_complete()
handler, so that object might be able to call
object_get_canonical_path() in its completion handler.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
add memdev backend infrastructure

Provides framework for splitting host RAM allocation/
policies into a separate backend that could be used
by devices.

Initially only legacy RAM backend is provided, which
uses memory_region_init_ram() allocator and compatible
with every CLI option that affects memory_region_init_ram().

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
v3:
 - fix path leak & use object_get_canonical_path_component()
   for getting object name
v2:
 - reuse UserCreatable interface instead of custom callbacks

hostmem-ram: fix string leak

Signed-off-by: Igor Mammedov <imammedo@redhat.com>

object_get_canonical_path_component

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
vl.c: extend -m option to support options for memory hotplug

Add following parameters:
  "slots" - total number of hotplug memory slots
  "maxmem" - maximum possible memory

"slots" and "maxmem" should go in pair and "maxmem" should be greater
than "mem" for memory hotplug to be enabled.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
v3:
 - store maxmem & slots valus in QEMUMachineInitArgs
v2:
 - rebased on top of the latest "vl: convert -m to QemuOpts"
add pc-{i440fx,q35}-2.1 machine types

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
pc: create custom generic PC machine type

it will be used for PC specific options/variables

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
qdev: hotplug for buss-less devices

Adds get_hotplug_handler() method to machine, and
makes bus-less device to use it during hotplug
as a means to discover hotplug handler controller.
Returned controller is used to permorm a hotplug
action.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
qdev: expose DeviceState.hotplugged field as a property

so that managment could detect via QOM interface if device was
hotplugged

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
dimm: implement dimm device abstraction

Each hotplug-able memory slot is a DimmDevice.
A hot-add operation for a DIMM:
- creates a new DimmDevice and makes hotplug controller to map it into
  guest address space

Hotplug operations are done through normal device_add commands.
For migration case, all hotplugged DIMMs on source should be specified
on target's command line using '-device' option with properties set to
the same values as on source.

To simplify review, patch introduces only DimmDevice QOM skeleton that
will be extended by following patches to implement actual memory hotplug
and related functions.

Signed-off-by: Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
v4:
  drop DimmBus in favor of bus-less device hotplug
v3:
  pc: compile memhotplug on i386 target too
v2:
  fix typo s/DimmBus/DimmDevice/ in doc comment
  s/klass/oc/;s/*/parent_obj/;a/gtk-doc markup/
memory: add memory_region_is_mapped() API

which allows to check if MemoryRegion is already mapped.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
dimm: do not allow to set alredy used memdev

using the same memdev backend more than once will cause
assersion at MemoryRegion mapping time becase it's already
mapped. Prevent it by checking that ref counter of memdev
object which is 1 for unused memdev and forbid setting
links<> property if ref counter is more than 1.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
pc: initialize memory hotplug address space

initialize and map hotplug memory address space container
into guest's RAM address space.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
pc: exit QEMU if slots > 256

... which is current ACPI implementation limit.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
pc: add 'etc/reserved-memory-end' fw_cfg interface for SeaBIOS

'etc/reserved-memory-end' will allow QEMU to tell BIOS where PCI
BARs mapping could safely start in high memory.

Allowing BIOS to start mapping 64-bit PCI BARs at address where it
wouldn't conflict with other mappings QEMU might place before it.

That permits QEMU to reserve extra address space before
64-bit PCI hole for memory hotplug.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
Seabios part is already commited: 0f474d07d
pc: add memory hotplug handler to PC_MACHINE

that will perform mapping of DIMM device into guest's RAM address space

Signed-off-by: Igor Mammedov <imammedo@redhat.com>