tests: virtio-9p: add basic configuration test

This adds PCI init code and a basic test that checks the device config
matches what is passed on the command line.
Signed-off-by: NGreg Kurz <groug@kaod.org>
Acked-by: NCornelia Huck <cornelia.huck@de.ibm.com>

tests/Makefile.include

@@ -627,7 +627,7 @@ tests/virtio-blk-test$(EXESUF): tests/virtio-blk-test.o $(libqos-virtio-obj-y)
 tests/virtio-net-test$(EXESUF): tests/virtio-net-test.o $(libqos-pc-obj-y) $(libqos-virtio-obj-y)
 tests/virtio-rng-test$(EXESUF): tests/virtio-rng-test.o $(libqos-pc-obj-y)
 tests/virtio-scsi-test$(EXESUF): tests/virtio-scsi-test.o $(libqos-virtio-obj-y)
-tests/virtio-9p-test$(EXESUF): tests/virtio-9p-test.o
+tests/virtio-9p-test$(EXESUF): tests/virtio-9p-test.o $(libqos-virtio-obj-y)
 tests/virtio-serial-test$(EXESUF): tests/virtio-serial-test.o
 tests/virtio-console-test$(EXESUF): tests/virtio-console-test.o
 tests/tpci200-test$(EXESUF): tests/tpci200-test.o

tests/virtio-9p-test.c

@@ -10,6 +10,13 @@
 #include "qemu/osdep.h"
 #include "libqtest.h"
 #include "qemu-common.h"
+#include "libqos/pci-pc.h"
+#include "libqos/virtio.h"
+#include "libqos/virtio-pci.h"
+#include "libqos/malloc.h"
+#include "libqos/malloc-pc.h"
+#include "standard-headers/linux/virtio_ids.h"
+#include "standard-headers/linux/virtio_pci.h"
 
 static const char mount_tag[] = "qtest";
 static char *test_share;
@@ -42,10 +49,80 @@ static void pci_nop(void)
     qvirtio_9p_stop();
 }
 
+typedef struct {
+    QVirtioDevice *dev;
+    QGuestAllocator *alloc;
+    QPCIBus *bus;
+    QVirtQueue *vq;
+} QVirtIO9P;
+
+static QVirtIO9P *qvirtio_9p_pci_init(void)
+{
+    QVirtIO9P *v9p;
+    QVirtioPCIDevice *dev;
+
+    v9p = g_new0(QVirtIO9P, 1);
+    v9p->alloc = pc_alloc_init();
+    v9p->bus = qpci_init_pc();
+
+    dev = qvirtio_pci_device_find(v9p->bus, VIRTIO_ID_9P);
+    g_assert_nonnull(dev);
+    g_assert_cmphex(dev->vdev.device_type, ==, VIRTIO_ID_9P);
+    v9p->dev = (QVirtioDevice *) dev;
+
+    qvirtio_pci_device_enable(dev);
+    qvirtio_reset(&qvirtio_pci, v9p->dev);
+    qvirtio_set_acknowledge(&qvirtio_pci, v9p->dev);
+    qvirtio_set_driver(&qvirtio_pci, v9p->dev);
+
+    v9p->vq = qvirtqueue_setup(&qvirtio_pci, v9p->dev, v9p->alloc, 0);
+    return v9p;
+}
+
+static void qvirtio_9p_pci_free(QVirtIO9P *v9p)
+{
+    qvirtqueue_cleanup(&qvirtio_pci, v9p->vq, v9p->alloc);
+    pc_alloc_uninit(v9p->alloc);
+    qvirtio_pci_device_disable(container_of(v9p->dev, QVirtioPCIDevice, vdev));
+    g_free(v9p->dev);
+    qpci_free_pc(v9p->bus);
+    g_free(v9p);
+}
+
+static void pci_basic_config(void)
+{
+    QVirtIO9P *v9p;
+    void *addr;
+    size_t tag_len;
+    char *tag;
+    int i;
+
+    qvirtio_9p_start();
+    v9p = qvirtio_9p_pci_init();
+
+    addr = ((QVirtioPCIDevice *) v9p->dev)->addr + VIRTIO_PCI_CONFIG_OFF(false);
+    tag_len = qvirtio_config_readw(&qvirtio_pci, v9p->dev,
+                                   (uint64_t)(uintptr_t)addr);
+    g_assert_cmpint(tag_len, ==, strlen(mount_tag));
+    addr += sizeof(uint16_t);
+
+    tag = g_malloc(tag_len);
+    for (i = 0; i < tag_len; i++) {
+        tag[i] = qvirtio_config_readb(&qvirtio_pci, v9p->dev,
+                                      (uint64_t)(uintptr_t)addr + i);
+    }
+    g_assert_cmpmem(tag, tag_len, mount_tag, tag_len);
+    g_free(tag);
+
+    qvirtio_9p_pci_free(v9p);
+    qvirtio_9p_stop();
+}
+
 int main(int argc, char **argv)
 {
     g_test_init(&argc, &argv, NULL);
     qtest_add_func("/virtio/9p/pci/nop", pci_nop);
+    qtest_add_func("/virtio/9p/pci/basic/configuration", pci_basic_config);
 
     return g_test_run();
 }