qemu-ga patch queue

* new commands: guest-get-timezone, guest-get-users, guest-get-host-name
* fix hang on w32 when stopping qemu-ga service while fs frozen
* fix missing setting of can-offline in guest-get-vcpus
* make qemu-ga VSS w32 service on-demand rather than on-startup
* fix unecessary errors to EventLog on w32
* improvements to fsfreeze documentation

v2:
 * document 'zone' field of guest-get-timezone as informational-only
   (Daniel, Eric)
 * fix build error for glib < 2.32 (Peter)

# gpg: Signature made Thu 27 Apr 2017 06:43:42 AM BST
# gpg:                using RSA key 0x3353C9CEF108B584
# gpg: Good signature from "Michael Roth <flukshun@gmail.com>"
# gpg:                 aka "Michael Roth <mdroth@utexas.edu>"
# gpg:                 aka "Michael Roth <mdroth@linux.vnet.ibm.com>"
# Primary key fingerprint: CEAC C9E1 5534 EBAB B82D  3FA0 3353 C9CE F108 B584

* mdroth/tags/qga-pull-2017-04-25-v2-tag:
  qga: Add `guest-get-timezone` command
  qga: Add 'guest-get-users' command
  qga: improve fsfreeze documentations
  qga: Add 'guest-get-host-name' command
  qga-win: Fix Event Viewer errors caused by qemu-ga
  qga-win: Fix a bug where qemu-ga service is stuck during stop operation
  qga-win: Enable 'can-offline' field in 'guest-get-vcpus' reply
  qemu-ga: Make QGA VSS provider service run only when needed
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

Adds a new command `guest-get-timezone` reporting the currently
configured timezone on the system. The information on what timezone is
currently is configured is useful in case of Windows VMs where the
offset of the hardware clock is required to have the same offset. This
can be used for management systems like `oVirt` to detect the timezone
difference and warn administrators of the misconfiguration.
Signed-off-by: NVinzenz Feenstra <vfeenstr@redhat.com>
Reviewed-by: NSameeh Jubran <sameeh@daynix.com>
Tested-by: NSameeh Jubran <sameeh@daynix.com>
* moved stub implementation to end of function for consistency
* document that timezone names are for informational use only.
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

A command that will list all currently logged in users, and the time
since when they are logged in.

Examples:

virsh # qemu-agent-command F25 '{ "execute": "guest-get-users" }'
{"return":[{"login-time":1490622289.903835,"user":"root"}]}

virsh # qemu-agent-command Win2k12r2 '{ "execute": "guest-get-users" }'
{"return":[{"login-time":1490351044.670552,"domain":"LADIDA",
"user":"Administrator"}]}
Signed-off-by: NVinzenz Feenstra <vfeenstr@redhat.com>
* make g_hash_table_contains compat func inline to avoid
  unused warnings
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

Some users find the fsfreeze behaviour confusing. Add some notes about
invalid mount points and Windows usage.

Related to:
https://bugzilla.redhat.com/show_bug.cgi?id=1436976Signed-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: NVinzenz Feenstra <vfeenstr@redhat.com>
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

Retrieving the guest host name is a very useful feature for virtual management
systems. This information can help to have more user friendly VM access
details, instead of an IP there would be the host name. Also the host name
reported can be used to have automated checks for valid SSL certificates.

virsh # qemu-agent-command F25 '{ "execute": "guest-get-host-name" }'
{"return":{"host-name":"F25.lab.evilissimo.net"}}
Signed-off-by: NVinzenz Feenstra <vfeenstr@redhat.com>
* minor whitespace fix-ups
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

When the command "guest-fsfreeze-freeze" is executed it causes
the VSS service to log the error below in the Event Viewer. This
error is caused by an issue in the function "CommitSnapshots" in
provider.cpp:

* When VSS_TIMEOUT_MSEC expires the funtion returns E_ABORT. This causes
the error #12293.

|event id|                           error                               |
* 12293  : Volume Shadow Copy Service error: Error calling a routine on a
           Shadow Copy Provider {00000000-0000-0000-0000-000000000000}.
           Routine details CommitSnapshots [hr = 0x80004004, Operation
           aborted.
Signed-off-by: NSameeh Jubran <sameeh@daynix.com>
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

After triggering a freeze command without any following thaw command,
qemu-ga will not respond to stop operation. This behaviour is wanted on Linux
as there is no time limit for a freeze command and we want to prevent
quitting in the middle of freeze, on the other hand on Windows the time
limit for freeze is 10 seconds, so we should wait for the timeout, thaw
the file system and quit.
Signed-off-by: NSameeh Jubran <sameeh@daynix.com>
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

The QGA schema states:

@can-offline: Whether offlining the VCPU is possible. This member
               is always filled in by the guest agent when the structure
               is returned, and always ignored on input (hence it can be
               omitted then).

Currently 'can-offline' is missing entirely from the reply. This causes
errors in libvirt which is expecting the reply to be compliant with the
schema docs.

BZ#1438735: https://bugzilla.redhat.com/show_bug.cgi?id=1438735Signed-off-by: NSameeh Jubran <sameeh@daynix.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

Currently the service runs in background on boot even though it is not
needed and once it is running it never stops. The service needs to be
running only during freeze operation and it should be stopped after
executing thaw.
Signed-off-by: NSameeh Jubran <sameeh@daynix.com>
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

Fix for exit_atomic tcg opcode paths

# gpg: Signature made Wed 26 Apr 2017 18:27:11 BST
# gpg:                using RSA key 0xAD1270CC4DD0279B
# gpg: Good signature from "Richard Henderson <rth7680@gmail.com>"
# gpg:                 aka "Richard Henderson <rth@redhat.com>"
# gpg:                 aka "Richard Henderson <rth@twiddle.net>"
# Primary key fingerprint: 9CB1 8DDA F8E8 49AD 2AFC  16A4 AD12 70CC 4DD0 279B

* remotes/rth/tags/pull-tcg-20170426:
  tcg: Initialize return value after exit_atomic
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Users of tcg_gen_atomic_cmpxchg and do_atomic_op rightfully utilize
the output.  Even though this code is dead, it gets translated, and
without the initialization we encounter a tcg_error.
Reported-by: NNikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Tested-by: NNikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Tested-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRichard Henderson <rth@twiddle.net>

This reverts commit 0fc8aec7.

In commit 2dfe5113 we split a trace event with a lot of arguments
in two, because the UST trace backend has a limit on the number
of arguments you can have in a single trace event. Unfortunately
we subsequently forgot about this, and in commit 0fc8aec7
we merged the two trace events again, recreating the "UST backend
doesn't build" bug.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

HMP pull, with tcg fix

# gpg: Signature made Wed 26 Apr 2017 14:55:30 BST
# gpg:                using RSA key 0x0516331EBC5BFDE7
# gpg: Good signature from "Dr. David Alan Gilbert (RH2) <dgilbert@redhat.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 45F5 C71B 4A0C B7FB 977A  9FA9 0516 331E BC5B FDE7

* remotes/dgilbert/tags/pull-hmp-20170426:
  tests: Add a tester for HMP commands
  libqtest: Add a generic function to run a callback function for every machine
  libqtest: Ignore QMP events when parsing the response for HMP commands
  monitor: Check whether TCG is enabled before running the "info jit" code
  hmp: gpa2hva and gpa2hpa hostaddr command
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

HMP commands do not get any automatic testing yet, so on certain
QEMU machines, some HMP commands were causing crashes in the past.
Thus we should test HMP commands in our test suite, too, to avoid
that such problems creep in again in the future.
Signed-off-by: NThomas Huth <thuth@redhat.com>
Message-Id: <1493097407-20482-1-git-send-email-thuth@redhat.com>
Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>

Some tests need to run single tests for every available machine of the
current QEMU binary. To avoid code duplication, let's extract this
code that deals with 'query-machines' into a separate function.
Signed-off-by: NThomas Huth <thuth@redhat.com>
Message-Id: <1490860207-8302-3-git-send-email-thuth@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>

When running certain HMP commands (like "device_del") via QMP, we
can sometimes get a QMP event in the response first, so that the
"g_assert(ret)" statement in qtest_hmp() triggers and the test
fails. Fix this by ignoring such QMP events while looking for the
real return value from QMP.
Signed-off-by: NThomas Huth <thuth@redhat.com>
Message-Id: <1490860207-8302-2-git-send-email-thuth@redhat.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
  Added note to qtest_hmp/qtest_hmpv's header description to say
  it discards events

The "info jit" command currently aborts on Mac OS X with the message
"qemu_mutex_lock: Invalid argument" when running with "-M accel=qtest".
We should only call into the TCG code here if TCG has really been
enabled and initialized.
Signed-off-by: NThomas Huth <thuth@redhat.com>
Message-Id: <1493179907-22516-1-git-send-email-thuth@redhat.com>
Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Tested-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>

These commands are useful when testing machine-check passthrough.
gpa2hva is useful to inject a MADV_HWPOISON madvise from gdb, while
gpa2hpa is useful to inject an error with the mce-inject kernel
module.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <1490021158-4469-1-git-send-email-pbonzini@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <20170420133058.12911-1-pbonzini@redhat.com>
Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>

ppc patch queue 2017-04-26

Here's a respind of my first pull request for qemu-2.10, consisting of
assorted patches which have accumulated while qemu-2.9 stabilized.
Highlights are:
    * Rework / cleanup of the XICS interrupt controller
    * Substantial improvement to the 'powernv' machine type
        - Includes an MMIO XICS version
    * POWER9 support improvements
        - POWER9 guests with KVM
        - Partial support for POWER9 guests with TCG
    * IOMMU and VFIO improvements
    * Assorted minor changes

There are several IPMI patches here that aren't usually in my area of
maintenance, but there isn't a regular maintainer and these patches
are for the benefit of the powernv machine type.

This pull request supersedes my 2017-04-26 pull request.  This new set
fixes a bug in one of the aforementioned IPMI patches which caused
clang sanitizer failures (and may have crashed on some libc / host
versions).

# gpg: Signature made Wed 26 Apr 2017 07:58:10 BST
# gpg:                using RSA key 0x6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg:                 aka "David Gibson (kernel.org) <dwg@kernel.org>"
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.10-20170426: (48 commits)
  MAINTAINERS: Remove myself from e500
  target/ppc: Style fixes
  e500,book3s: mfspr 259: Register mapped/aliased SPRG3 user read
  target/ppc: Flush TLB on write to PIDR
  spapr-cpu-core: Release ICPState object during CPU unrealization
  ppc/pnv: generate an OEM SEL event on shutdown
  ppc/pnv: add initial IPMI sensors for the BMC simulator
  ppc/pnv: populate device tree for IPMI BT devices
  ppc/pnv: populate device tree for serial devices
  ppc/pnv: populate device tree for RTC devices
  ppc/pnv: scan ISA bus to populate device tree
  ppc/pnv: enable only one LPC bus
  ppc/pnv: Add support for POWER8+ LPC Controller
  spapr: remove the 'nr_servers' field from the machine
  target/ppc: Fix size of struct PPCElfPrstatus
  ipmi: introduce an ipmi_bmc_gen_event() API
  ipmi: introduce an ipmi_bmc_sdr_find() API
  ipmi: provide support for FRUs
  ipmi: use a file to load SDRs
  ppc: add IPMI support
  ...
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Xen 2017/04/21 + fix

# gpg: Signature made Tue 25 Apr 2017 19:10:37 BST
# gpg:                using RSA key 0x894F8F4870E1AE90
# gpg: Good signature from "Stefano Stabellini <stefano.stabellini@eu.citrix.com>"
# gpg:                 aka "Stefano Stabellini <sstabellini@kernel.org>"
# Primary key fingerprint: D04E 33AB A51F 67BA 07D3  0AEA 894F 8F48 70E1 AE90

* remotes/sstabellini/tags/xen-20170421-v2-tag: (21 commits)
  move xen-mapcache.c to hw/i386/xen/
  move xen-hvm.c to hw/i386/xen/
  move xen-common.c to hw/xen/
  add xen-9p-backend to MAINTAINERS under Xen
  xen/9pfs: build and register Xen 9pfs backend
  xen/9pfs: send responses back to the frontend
  xen/9pfs: implement in/out_iov_from_pdu and vmarshal/vunmarshal
  xen/9pfs: receive requests from the frontend
  xen/9pfs: connect to the frontend
  xen/9pfs: introduce Xen 9pfs backend
  9p: introduce a type for the 9p header
  xen: import ring.h from xen
  configure: use pkg-config for obtaining xen version
  xen: additionally restrict xenforeignmemory operations
  xen: use libxendevice model to restrict operations
  xen: use 5 digit xen versions
  xen: use libxendevicemodel when available
  configure: detect presence of libxendevicemodel
  xen: create wrappers for all other uses of xc_hvm_XXX() functions
  xen: rename xen_modified_memory() to xen_hvm_modified_memory()
  ...
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

I recently left Freescale/NXP, and even before that it'd been a few years
since I was actively involved in KVM/QEMU work.
Signed-off-by: NScott Wood <oss@buserror.net>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

This makes a small step fixing one of many style problems that exist in
the older ppc code.  This removes spaces between function (or macro) name
and the following '('.
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

This patch registers mfspr 259 for Book3S and e500 family cores
following this research:

mfspr 259 provides read-only mapped user access to SPRG3(SPR 275) according to:

- PowerISA 2.02, Book III (documents implementation starting with POWER4+ @ p20)
- IBM PowerPC 970MP RISC Microprocessor User's Manual v2.1, page 48
- Amit Singh: "Mac OS X Internals: A Systems Approach" on 970 and 970FX cores:
  He demonstrates mfspr 259 reading TLS data from Mac OS X on G5 on page 588
- NXP documents it in the Core Reference Manuals of: e500, e500mc and e5500
- getcpu() of the 32 & 64-bit Book3S Linux vDSOs use it to read the core number

mfspr 259 does not appear to be implemented in these cores according to:

- 74xx series: MPC7410/MPC7400 and MPC7450 RISC Microprocessor Reference Manuals
- 4xx series:  PPC440 Processor User's Manual, Revision 1.09 by AMCC
- 750 series:  IBM PowerPC 750CL RISC Microprocessor User's Manual
- e200 series: e200z4 Power Architectureâ Core Reference Manual

Implementation: gen_spr_usprg3() is called from init_proc_book3s_common()
(covers the 970 and POWER cores) and init_proc_e500() (covers the e500 family)
to register spr_read_ureg() in the same way which it already provides
the mapped SPR access for SPR_USPRG4-7 in gen_spr_usprgh() for cores
which have the same read-only mapped SPRG register access for SPRG4-7.

Verified using Linux by pinning a thread to a core and checking sched_getcpu()
using qemu-system-ppc64 -M pseries -cpu POWER8 using MTTCG on a x86_64 host.
Signed-off-by: NBernhard Kaindl <bernhard.kaindl@thalesgroup.com>
Reviewed-by: NStefan Resch <stefan.resch@thalesgroup.com>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

The PIDR (process id register) is used to store the id of the currently
running process, which is used to select the process table entry used to
perform address translation. This means that when we write to this register
all the translations in the TLB become outdated as they are for a
previously running process. Thus when this register is written to we need
to invalidate the TLB entries to ensure stale entries aren't used to
to perform translation for the new process, which would result in at best
segfaults or alternatively just random memory being accessed.
Signed-off-by: NSuraj Jitindar Singh <sjitindarsingh@gmail.com>
Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au>
[dwg: Fixed compile error for 32-bit targets]
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

Recent commits that re-organized ICPState object missed to destroy
the object when CPU is unrealized. Fix this so that CPU unplug
doesn't abort QEMU.
Signed-off-by: NBharata B Rao <bharata@linux.vnet.ibm.com>
Reviewed-by: NCédric Le Goater <clg@kaod.org>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

OpenPOWER systems expect to be notified with such an event before a
shutdown or a reboot. An OEM SEL message is sent with specific
identifiers and a user data containing the request : OFF or REBOOT.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

Skiboot, the firmware for the PowerNV platform, expects the BMC to
provide some specific IPMI sensors. These sensors are exposed in the
device tree and their values are updated by the firmware at boot time.

Sensors of interest are :

	"FW Boot Progress"
	"Boot Count"

As such a device is defined on the command line, we can only detect
its presence at reset time.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

When an ipmi-bt device [1] is defined on the ISA bus, we need to
populate the device tree with the object properties. Such devices are
created with the command line options :

   -device ipmi-bmc-sim,id=bmc0 -device isa-ipmi-bt,bmc=bmc0,irq=10

[1] https://lists.gnu.org/archive/html/qemu-devel/2015-11/msg03168.htmlSigned-off-by: NCédric Le Goater <clg@kaod.org>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

Signed-off-by: NCédric Le Goater <clg@kaod.org>
Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

The code could be common to any ISA device but we are missing the IO
length.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

This is an empty shell that we will use to include nodes in the device
tree for ISA devices. We expect RTC, UART and IPMI BT devices.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

The default LPC bus of a multichip system is on chip 0. It's
recognized by the firmware (skiboot) using a "primary" property in the
device tree.

We introduce a pnv_chip_lpc_offset() routine to locate the LPC node of
a chip and set the property directly from the machine level.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

It adds the Naples chip which supports proper LPC interrupts via the
LPC controller rather than via an external CPLD.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
[clg: - updated for qemu-2.9
      - ported on latest PowerNV patchset
      - moved the IRQ handler in pnv_lpc.c
      - introduced pnv_lpc_isa_irq_create() to create the ISA IRQs ]
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

xics_system_init() does not need 'nr_servers' anymore as it is only
used to define the 'interrupt-controller' node in the device tree. So
let's just compute the value when calling spapr_dt_xics().

This also gives us an opportunity to simplify the xics_system_init()
routine and introduce a specific spapr_ics_create() helper to create
the sPAPR ICS object.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

gdb refuses to parse QEMU memory dumps because struct PPCElfPrstatus
is the wrong size. Fix it.
Signed-off-by: NAnton Blanchard <anton@samba.org>
Fixes: e62fbc54 ("target-ppc: dump-guest-memory support")
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

It will be used to fill the message buffer with custom events expected
by some systems. Typically, an Open PowerNV platform guest is notified
with an OEM SEL message before a shutdown or a reboot.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Acked-by: NCorey Minyard <cminyard@mvista.com>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

This patch exposes a new IPMI routine to query a sdr entry from the
sdr table maintained by the IPMI BMC simulator. The API is very
similar to the internal sdr_find_entry() routine and should be used
the same way to query one or all sdrs.

A typical use would be to loop on the sdrs to build nodes of a device
tree.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Acked-by: NCorey Minyard <cminyard@mvista.com>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

This patch provides a simple FRU support for the BMC simulator. FRUs
are loaded from a file which name is specified in the object
properties, each entry having a fixed size, also specified in the
properties. If the file is unknown or not accessible for some reason,
a unique entry of 1024 bytes is created as a default. Just enough to
start some simulation.

These commands complies with the IPMI spec : "34. FRU Inventory Device
Commands".
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Acked-by: NCorey Minyard <cminyard@mvista.com>
[dwg: Folded in subsequent fix to handle NULL filename]
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

The IPMI BMC simulator populates the sdr/sensor tables with a minimal
set of entries (Watchdog). But some qemu platforms might want to use
extra entries for their custom needs.

This patch modifies slighty the initializing routine to take into
account a larger set read from a file. The name of the file to use is
defined through a new 'sdr' property of the simulator device.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Acked-by: NCorey Minyard <cminyard@mvista.com>
Reviewed-by: NMarcel Apfelbaum <marcel@redhat.com>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

OpenPOWER systems use a BT device to communicate with the BMC.
Provide support for it.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>