linux-user: Enable Signal Handlers on PPC64

Enable the 64-bit PowerPC signal handling code that was previously
disabled via #ifdefs.  Specifically:

  - Move the target_mcontext (register save area) structure and
    append it to the 64-bit target_sigcontext structure.  This
    provides the space on the stack for saving and restoring
    context.
  - Define the target_rt_sigframe for 64-bit.
  - Adjust the setup_frame and setup_rt_frame routines to properly
    select the target_mcontext area and trampoline within the stack
    frame; tthis is different for 32-bit and 64-bit implementations.
  - Adjust the do_setcontext stub for 64-bit so that it compiles
    without warnings.

The 64-bit signal handling code is still not functional after this
change; but the 32-bit code is.  Subsequent changes will address
specific issues with the 64-bit code.

Signed-off-by: Tom Musta <tommusta@gmail.com>
[agraf: fix build on 32bit hosts]
Signed-off-by: Alexander Graf <agraf@suse.de>
linux-user: Properly Dereference PPC64 ELFv1 Signal Handler Pointer

Properly dereference 64-bit PPC ELF V1 ABIT function pointers to signal handlers.
On this platform, function pointers are pointers to structures and the first 64
bits of such a structure contains the function's entry point.  The second 64 bits
contains the TOC pointer, which must be placed into GPR 2.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
linux-user: Implement do_setcontext for PPC64

Eliminate the stub for the do_setcontext() function for TARGET_PPC64.  The
implementation re-uses the existing TARGET_PPC32 code with the only change
being the computation of the address of the register save area.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
linux-user: Move get_ppc64_abi

The get_ppc64_abi is used to determine the ELF ABI (i.e. V1 or V2). This
routine is currently implemented in the linux-user/elfload.c file but
is useful in other scenarios.  Move the routine to a more generally
available location (linux-user/ppc/target_cpu.h).

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
linux-user: Handle PPC64 ELFv2 Function Pointers

Function pointers in the 64-bit ELFv2 PowerPC ABI are actual (internal)
entry point addresses.  However, when invoking a function via a function
pointer, GPR 12 must also be set to this address so that the TOC may be
handled properly.

Add this support to the invocation of a signal handler.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
hw/ppc/spapr_hcall.c: Fix typo in function names

Fix a typo in the names of a couple of functions
(s/resouce/resource/).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
spapr: add uuid/host details to device tree

Useful for identifying the guest/host uniquely within the
guest. Adding following properties to the guest root node.

vm,uuid - uuid of the guest
host-model - Host model number
host-serial - Host machine serial number
hypervisor type - Tells its "kvm"

Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
PPC: mac99: Move NVRAM to page boundary when necessary

When running KVM we have to adhere to host page boundaries for memory slots.
Unfortunately the NVRAM on mac99 is a 4k RAM hole inside of an MMIO flash
area.

So if our host is configured with 64k page size, we can't use the mac99 target
with KVM. This is a real shame, as this limitation is not really an issue - we
can easily map NVRAM somewhere else and at least Linux and Mac OS X use it
at their new location.

So in that emergency case when it's about failing to run at all and moving NVRAM
to a place it shouldn't be at, choose the latter.

This patch enables -M mac99 with KVM on 64k page size hosts.

Signed-off-by: Alexander Graf <agraf@suse.de>