tests: Add ivshmem qtest

Note that it launches two instances, as sharing memory is the purpose of
ivshmem.

Cc: Cam Macdonell <cam@cs.ualberta.ca>
Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
[ Remove Nahanni codename, add test to pci set - Marc-André ]
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>

tests/Makefile

@@ -150,6 +150,8 @@ gcov-files-pci-y += hw/display/virtio-gpu-pci.c
 gcov-files-pci-$(CONFIG_VIRTIO_VGA) += hw/display/virtio-vga.c
 check-qtest-pci-y += tests/intel-hda-test$(EXESUF)
 gcov-files-pci-y += hw/audio/intel-hda.c hw/audio/hda-codec.c
+check-qtest-pci-$(CONFIG_POSIX) += tests/ivshmem-test$(EXESUF)
+gcov-files-pci-y += hw/misc/ivshmem.c
 
 check-qtest-i386-y = tests/endianness-test$(EXESUF)
 check-qtest-i386-y += tests/fdc-test$(EXESUF)
@@ -522,6 +524,7 @@ tests/qemu-iotests/socket_scm_helper$(EXESUF): tests/qemu-iotests/socket_scm_hel
 tests/test-qemu-opts$(EXESUF): tests/test-qemu-opts.o $(test-util-obj-y)
 tests/test-write-threshold$(EXESUF): tests/test-write-threshold.o $(test-block-obj-y)
 tests/test-netfilter$(EXESUF): tests/test-netfilter.o $(qtest-obj-y)
+tests/ivshmem-test$(EXESUF): tests/ivshmem-test.o
 
 ifeq ($(CONFIG_POSIX),y)
 LIBS += -lutil

tests/ivshmem-test.c

@@ -0,0 +1,51 @@
+/*
+ * QTest testcase for ivshmem
+ *
+ * Copyright (c) 2014 SUSE LINUX Products GmbH
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include <glib.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "libqtest.h"
+#include "qemu/osdep.h"
+
+static char dev_shm_path[] = "/dev/shm/qtest.XXXXXX";
+
+/* Tests only initialization so far. TODO: Replace with functional tests */
+static void nop(void)
+{
+}
+
+int main(int argc, char **argv)
+{
+    QTestState *s1, *s2;
+    char *cmd;
+    int ret, fd;
+
+    g_test_init(&argc, &argv, NULL);
+    qtest_add_func("/ivshmem/nop", nop);
+
+    fd = mkstemp(dev_shm_path);
+    g_assert(fd >= 0);
+    close(fd);
+    unlink(dev_shm_path);
+
+    cmd = g_strdup_printf("-device ivshmem,shm=%s,size=1M", &dev_shm_path[9]);
+    s1 = qtest_start(cmd);
+    s2 = qtest_start(cmd);
+    g_free(cmd);
+
+    ret = g_test_run();
+
+    qtest_quit(s1);
+    qtest_quit(s2);
+
+    unlink(dev_shm_path);
+
+    return ret;
+}