Note that st*_raw and ld*_raw are effectively replaced by st*_p and ld*_p.
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

We also fix max_nr_ports at reset time as the device endianness may have
changed.
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
Reviewed-by: NAnthony Liguori <aliguori@us.ibm.com>
[ pass VirtIODevice * to memory accessors,
  fix max_nr_ports at reset time,
  Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Note that st*_raw and ld*_raw are effectively replaced by st*_p and ld*_p.
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
Reviewed-by: NAnthony Liguori <aliguori@us.ibm.com>
[ pass VirtIODevice * to memory accessors,
  converted new tswap locations to virtio_tswap,
  Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Note that st*_raw and ld*_raw are effectively replaced by st*_p and ld*_p.
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
Reviewed-by: NAnthony Liguori <aliguori@us.ibm.com>
[ pass VirtIODevice * to memory accessors,
  Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
Reviewed-by: NAnthony Liguori <aliguori@us.ibm.com>
[ pass VirtIODevice * to memory accessors,
  Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
Reviewed-by: NAnthony Liguori <aliguori@us.ibm.com>
[ pass VirtIODevice * to memory accessors,
  converted new tswap locations to virtio_tswap,
  Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Quoting original text from Rusty: "This is based on a simpler patch by Anthony
Liguouri".
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
[ add VirtIODevice * argument to most helpers,
  Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

This is the virtio-access.h header file taken from Rusty's "endian-ambivalent
targets using legacy virtio" patch. It introduces helpers that should be used
when accessing vring data or by drivers for data that contains headers.
The virtio config space is also target endian, but the current code already
handles that with the virtio_is_big_endian() helper. There is no obvious
benefit at using the virtio accessors in this case.

Now we have two distinct paths: a fast inline one for fixed endian targets,
and a slow out-of-line one for targets that define the new TARGET_IS_BIENDIAN
macro.
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
[ relicensed virtio-access.h to GPLv2+ on Rusty's request,
  pass &address_space_memory to physical memory accessors,
  per-device endianness,
  virtio tswap16 and tswap64 helpers,
  faspath for fixed endian targets,
  Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Cc: Cédric Le Goater <clg@fr.ibm.com>
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Some CPU families can dynamically change their endianness. This means we
can have little endian ppc or big endian arm guests for example. This has
an impact on legacy virtio data structures since they are target endian.
We hence introduce a new property to track the endianness of each virtio
device. It is reasonnably assumed that endianness won't change while the
device is in use : we hence capture the device endianness when it gets
reset.

We migrate this property in a subsection, after the device descriptor. This
means the load code must not rely on it until it is restored. As a consequence,
the vring sanity checks had to be moved after the call to vmstate_load_state().
We enforce paranoia by poisoning the property at the begining of virtio_load().
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

If we want to support targets that can change endianness (modern PPC and
ARM for the moment), we need to add a per-CPU class method to be called
from the virtio code. The virtio_ prefix in the name is a hint for people
to avoid misusage (aka. anywhere but from the virtio code).

The default behaviour is to return the compile-time default target
endianness.
Suggested-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

We currently have a virtio_is_big_endian() helper that provides the target
endianness to the virtio code. As of today, the helper returns a fixed
compile-time value. Of course, this will have to change if we want to
support target endianness changes at run-time.

Let's move the TARGET_WORDS_BIGENDIAN bits out to a new helper and have
virtio_is_big_endian() implemented on top of it.

This patch doesn't change any functionality.
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

There is a need to add some more fields to VirtIODevice that should be
migrated (broken status, endianness). The problem is that we do not
want to break compatibility while adding a new feature... This issue has
been addressed in the generic VMState code with the use of optional
subsections. As a *temporary* alternative to port the whole virtio
migration code to VMState, this patch mimics a similar subsectionning
ability for virtio, using the VMState code.

Since each virtio device is streamed in its own section, the idea is to
stream subsections between the end of the device section and the start
of the next sections. This allows an older QEMU to complain and exit
when fed with subsections:

Unknown savevm section type 5
load of migration failed
Suggested-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

While we are here, we also check virtio_load() return value.
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

In order to migrate virtio subsections, they should be streamed after
the device itself. We need the device specific code to be called from
the common migration code to achieve this. This patch introduces load
and save methods for this purpose.
Suggested-by: NAndreas Färber <afaerber@suse.de>
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

The device configuration is set at realize time and never changes. It
should not be migrated as it is done today. For the sake of compatibility,
let's just skip them at load time.
Signed-off-by: NAlexander Graf <agraf@suse.de>
[ added missing casts to uint16_t *,
  added From, SoB and commit message,
  Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

TCP connectivity fails when the guest has a different endianness.
The packets are silently dropped on the host by the tap backend
when they are read from user space because the endianness of the
virtio-net header is in the wrong order. These lines may appear
in the guest console:

[  454.709327] skbuff: bad partial csum: csum=8704/4096 len=74
[  455.702554] skbuff: bad partial csum: csum=8704/4096 len=74

The issue that got first spotted with a ppc64le PowerKVM guest,
but it also exists for the less common case of a x86_64 guest run
by a big-endian ppc64 TCG hypervisor.
Signed-off-by: NCédric Le Goater <clg@fr.ibm.com>
[ Ported from PowerKVM,
  Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Fix typo in field name.
Strip two consequitive empty lines.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Old code was affected by memory gaps which resulted in buffer pointers
pointing to address outside of the mapped regions.

Here we are introducing following changes:
 - new function qemu_get_ram_block_host_ptr() returns host pointer
   to the ram block, it is needed to calculate offset of specific
   region in the host memory
 - new field mmap_offset is added to the VhostUserMemoryRegion. It
   contains offset where specific region starts in the mapped memory.
   As there is stil no wider adoption of vhost-user agreement was made
   that we will not bump version number due to this change
 - other fileds in VhostUserMemoryRegion struct are not changed, as
   they are all needed for usermode app implementation
 - region data is not taken from ram_list.blocks anymore, instead we
   use region data which is alredy calculated for use in vhost-net
 - Now multiple regions can have same FD and user applicaton can call
   mmap() multiple times with the same FD but with different offset
   (user needs to take care for offset page alignment)
Signed-off-by: NDamjan Marion <damarion@cisco.com>
Acked-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NDamjan Marion <damarion@cisco.com>

We don't support sparse NUMA node IDs yet, so this changes QEMU to
reject configs where not all nodes are present.
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

The same nodeid shouldn't appear multiple times in the command-line.

In addition to detecting command-line mistakes, this will fix a bug
where nb_numa_nodes may become larger than MAX_NODES (and cause
out-of-bounds access on the numa_info array).
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NHu Tao <hutao@cn.fujitsu.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

Based on "enable sparse node numbering" patch from Nishanth Aravamudan,
but without the code to actually support sparse node IDs. This just adds
the code to keep track of present/non-present nodes on the command-line,
without changing any behavior.
Signed-off-by: NNishanth Aravamudan <nacc@linux.vnet.ibm.com>
[Rename max_numa_node to max_numa_nodeid -Eduardo]
[Initialize max_numa_nodeid to 0 -Eduardo]
[Use MAX() macro when setting max_numa_nodeid -Eduardo]
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NHu Tao <hutao@cn.fujitsu.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

Commit 'virtio: validate config_len on load' restricted config_len
loaded from the wire to match the config_len that the device had.

Unfortunately, there are cases where this isn't true, the one
we found it on was the wce addition in virtio-blk.

Allow mismatched config-lengths:
   *) If the version on the wire is shorter then fine
   *) If the version on the wire is longer, load what we have space
      for and skip the rest.

(This is mst@redhat.com's rework of what I originally posted)
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

QEMU 2.0 changed memory layout for isapc and pc-0.10 to pc-0.13.
This prevents migration from QEMU 1.7.0 for these
machine types when -m 3.5G is specified.

Paolo Bonzini asked that:

    smbios_legacy_mode = true;
    has_reserved_memory = false;
    option_rom_has_mr = true;
    rom_file_has_mr = false;

also be done.

Cc: qemu-stable@nongnu.org
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NDon Slutz <dslutz@verizon.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Fixes: https://bugs.launchpad.net/qemu/+bug/1334307Tested-by: N"Slutz, Donald Christopher" <dslutz@verizon.com>

Signed-off-by: NDamjan Marion <damarion@cisco.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

It is necessary to reset RTC interrupt reinjection backlog if
guest time is synchronized via a different mechanism, such as
QGA's guest-set-time command.

Failing to do so causes both corrections to be applied (summed),
resulting in an incorrect guest time.
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

The property name is "prog_if", not "prof_if".
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Reported-by: NBALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

For each compat property on PC_Q35_COMPAT_*, there are only two
possibilities:

 * If the device is never instantiated when using a machine other than
   pc-q35, then the compat property can be safely added to
   PC_COMPAT_*;
 * If the device can be instantiated when using a machine other than
   pc-q35, that means the other machines also need the compat property
   to be set.

That means we don't need separate PC_Q35_COMPAT_* macros at all, today.

The hpet.hpet-intcap case is interesting: piix and q35 do have something
that emulates different defaults, but the machine-specific default is
applied _after_ compat_props are applied, by simply checking if the
property is zero (which is the real default on the hpet code).

The hpet.hpet-intcap=0x4 compat property can (should?) be applied to
piix too, because 0x4 was the default on both piix and q35 before the
hpet-intcap property was introduced.

Now, if one day we change the default HPET intcap on one of the PC
machine-types again, we may want to introduce PC_{Q35,I440FX}_COMPAT
macros. But while we don't need that, we can keep the code simple.
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Cc: Liu Ping Fan <pingfank@linux.vnet.ibm.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

s/if given for/is given for/;
Reported-by: NHu Tao <hutao@cn.fujitsu.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Fix English in comment:

s/the each/each/

s/  \*\// \*\//
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>

Fix up English in comments:
s/the each/each/
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>

Xtensa fixes and improvements queue 2014-06-29:
- fix FLASH mapping to boot region for KC705;
- clean up boot parameters passing;
- add uImage, DTB and initrd support.

# gpg: Signature made Sat 28 Jun 2014 23:40:32 BST using RSA key ID F83FA044
# gpg: Good signature from "Max Filippov <max.filippov@cogentembedded.com>"
# gpg:                 aka "Max Filippov <jcmvbkbc@gmail.com>"

* remotes/xtensa/tags/20140629-xtensa:
  hw/xtensa/xtfpga: implement initrd loading
  hw/xtensa/xtfpga: implement DTB loading
  hw/xtensa/xtfpga: implement uImage loading
  hw/xtensa/xtfpga: add memory info to bootparam
  hw/xtensa/xtfpga: refactor bootparameters filling
  hw/xtensa/xtfpga: use symbolic constants for bootparam tags
  hw/xtensa/xtfpga: retrieve parameters from machine_opts
  hw/xtensa: replace fprintfs with error_report
  hw/xtensa: remove extraneous xtensa_ prefix from file names
  hw/xtensa/xtfpga: fix FLASH mapping to boot region for KC705
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Block patches for 2.1.0-rc0

# gpg: Signature made Fri 27 Jun 2014 19:50:32 BST using RSA key ID C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"

* remotes/kevin/tags/for-upstream: (47 commits)
  iotests: Fix 083 for out-of-tree builds
  iotests: Drop Python version from 065's Shebang
  iotests: Use $PYTHON for Python scripts
  iotests: Source common.env
  configure: Enable out-of-tree iotests
  iotests: Allow out-of-tree run
  block.c: Don't return success for bdrv_append_temp_snapshot() failure
  qemu-iotests: Add TestRepairQuorum to 041 to test drive-mirror node-name mode.
  block: Add replaces argument to drive-mirror
  blockjob: Fix recent BLOCK_JOB_ERROR regression
  blockjob: Fix recent BLOCK_JOB_READY regression
  virtio-blk: Rename complete_request_early to complete_request_vring
  virtio-blk: Unify {non-,}dataplane's request handlings
  virtio-blk: Schedule BH in the right context
  virtio-blk: Export request handling functions to dataplane
  virtio-blk: Make request completion function virtual
  block: acquire AioContext in qmp_query_blockstats()
  block: make bdrv_query_stats() static
  virtio-blk: Fix and clean up the in_sg and out_sg check
  virtio-blk: Fill in VirtIOBlockReq.out in dataplane code
  ...
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

* remotes/qmp-unstable/queue/qmp:
  docs/qmp: Fix documentation of BLOCK_JOB_READY to match code
  char: report frontend open/closed state in 'query-chardev'
  virtio-serial: report frontend connection state via monitor
  qmp: add qmp-events.txt back
  qapi event: clean up in callers
  qapi script: clean up in scripts
  qapi: ignore generated event files
  qapi: move event defines
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Net patches

# gpg: Signature made Fri 27 Jun 2014 14:10:57 BST using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"

* remotes/stefanha/tags/net-pull-request:
  hw/net/eepro100: Implement read-only bits in MDI registers
  net: move queue number into NICPeers
  net: L2TPv3 transport
  qemu-bridge-helper: Fix fd leak in main()
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Patch queue for ppc - 2014-06-27

Changes include:

  - instruction emulation fixes
  - linux-user fixes
  - mac99: layout fixes
  - pseries: Initial VFIO support
  - pseries: support for UUID
  - pseries: support for -boot m

# gpg: Signature made Fri 27 Jun 2014 12:51:01 BST using RSA key ID 03FEDC60
# gpg: Can't check signature: public key not found

* remotes/agraf/tags/signed-ppc-for-upstream: (32 commits)
  PPC: e500: Only create dt entries for existing serial ports
  spapr_pci: Use XICS interrupt allocator and do not cache interrupts in PHB
  vmstate: Add preallocation for migrating arrays (VMS_ALLOC flag)
  xics: Implement xics_ics_free()
  spapr: Remove @next_irq
  spapr: Move interrupt allocator to xics
  xics: Disable flags reset on xics reset
  xics: Add xics_find_source()
  xics: Add flags for interrupts
  spapr: Add RTAS sysparm SPLPAR Characteristics
  spapr: Add RTAS sysparm UUID
  spapr: Fix RTAS sysparm DIAGNOSTICS_RUN_MODE
  spapr: Add rtas_st_buffer utility function
  spapr: Define a 2.1 pseries machine
  spapr: Fix code design style (s/SPAPRMachine/sPAPRMachineState)
  target-ppc: Add support for POWER8 pvr 0x4D0000
  uninorth: Fix PCI hole size
  mac99: Add motherboard devices before PCI cards
  target-ppc: Remove unused gen_qemu_ld8s()
  target-ppc: Remove unused IMM and d extract helpers
  ...
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

A series of patches to the s390-ccw bios:
- code cleanup
- improved error reporting
- most important, support to ipl (boot) from ECKD DASD (CDL, LDL or CMS
  formatted)

# gpg: Signature made Fri 27 Jun 2014 12:03:30 BST using RSA key ID C6F02FAF
# gpg: Can't check signature: public key not found

* remotes/cohuck/tags/s390x-20140627:
  pc-bios/s390-ccw: update binary
  pc-bios/s390-ccw: IPL from LDL/CMS-formatted ECKD DASD
  pc-bios/s390-ccw: IPL from CDL-formatted ECKD DASD
  pc-bios/s390-ccw: factor out ipl code
  pc-bios/s390-ccw: Add fill_hex_val func to provide better msgs
  pc-bios/s390-ccw: Unify error handling
  pc-bios/s390-ccw: add some utility code
  pc-bios/s390-ccw: handle different sector sizes
  pc-bios/s390-ccw: cleanup and enhance bootmap defintions
  pc-bios/s390-ccw: make checkpatch happy
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>