[kvm-unit-tests PATCH v4 17/17] powerpc/ppc64: make a fake debug-exit

[Andrew Jones <drjones@redhat.com>]

We should use a QEMU debug-exit device like chr-testdev, but for
now we just fake things by outputting the exit code (which we
parse later) and quitting with RTAS (which always exits with zero).

(When we've got a real debug-exit working, then this patch can
 be reverted.)

Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Tested-by: Laurent Vivier <lvivier@redhat.com>
---
 lib/powerpc/io.c | 4 ++++
 powerpc/run      | 7 +++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/powerpc/io.c b/lib/powerpc/io.c
index e57a28c583eb0..ba90a08650b9d 100644
--- a/lib/powerpc/io.c
+++ b/lib/powerpc/io.c
@@ -29,5 +29,9 @@ void puts(const char *s)
 
 void exit(int code)
 {
+// FIXME: change this print-exit/rtas-poweroff to chr_testdev_exit(),
+//        maybe by plugging chr-testdev into a spapr-vty.
+	printf("\nEXIT: STATUS=%d\n", ((code) << 1) | 1);
+	rtas_power_off();
 	halt(code);
 }
diff --git a/powerpc/run b/powerpc/run
index c5108100fc5e0..45492a1cb8afc 100755
--- a/powerpc/run
+++ b/powerpc/run
@@ -46,7 +46,10 @@ command="$qemu $M -bios $FIRMWARE"
 command+=" -display none -serial stdio -kernel"
 echo $command "$@"
 
-$command "$@"
-ret=$?
+#FIXME: rtas-poweroff always exits with zero, so we have to parse
+#       the true exit code from the output.
+lines=$($command "$@")
+echo "$lines"
+ret=$(grep '^EXIT: ' <<<"$lines" | sed 's/.*STATUS=\([0-9][0-9]*\).*/\1/')
 echo Return value from qemu: $ret
 exit $ret
-- 
2.4.3