Merge branch 'ppc64/initial-drop-v7' of https://github.com/rhdrjones/kvm-unit-tests into HEAD

This series brings basic setup; starts a test's C entry point, main(),
and printf, exit, and malloc work

Merge branch 'ppc64/initial-drop-v7' of https://github.com/rhdrjones/kvm-unit-tests into HEAD

This series brings basic setup; starts a test's C entry point, main(),
and printf, exit, and malloc work. Three more series should follow this
one which must bring; vector support, mmu support, and smp support, at
which point I believe the framework could just evolve with the creation
of unit tests.

Tested on TCG and a P8 kvm_pr machine, and Laurent has tested it on
both a PowerMac G5 (kvm_pr) and a kvm_hv machine. I'm looking forward
to hearing more testing feedback from others though.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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powerpc/ppc64: add hcall support and putchar

Add broken sc1 detection and patching and an hcall for putchar,
to use in puts. That, along with a couple more lines in start to
prepare for C code, and

powerpc/ppc64: add hcall support and putchar

Add broken sc1 detection and patching and an hcall for putchar,
to use in puts. That, along with a couple more lines in start to
prepare for C code, and a branch to main(), gets us "hello world".
Run with

qemu-system-ppc64 -M pseries \
-bios powerpc/boot_rom.bin \
-display none -serial stdio \
-kernel powerpc/selftest.elf

(We're still not relocating yet, that comes in a later patch. Thus,
testing hello-world at this point requires a hacked QEMU and linking
the unit test at QEMU's kernel load address.)

Signed-off-by: Andrew Jones <drjones@redhat.com>
Tested-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

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