tests: Add virtio device initialization

Add functions to read and write virtio header fields.
Add status bit setting in virtio-blk-device.

Signed-off-by: Marc Marí <marc.mari.barcelo@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/tests/libqos/virtio.h b/tests/libqos/virtio.h
index 2a05798ca7..8d7238bd91 100644
--- a/tests/libqos/virtio.h
+++ b/tests/libqos/virtio.h
@@ -12,6 +12,10 @@
 
 #define QVIRTIO_VENDOR_ID       0x1AF4
 
+#define QVIRTIO_RESET           0x0
+#define QVIRTIO_ACKNOWLEDGE     0x1
+#define QVIRTIO_DRIVER          0x2
+
 #define QVIRTIO_NET_DEVICE_ID   0x1
 #define QVIRTIO_BLK_DEVICE_ID   0x2
 
@@ -20,4 +24,30 @@ typedef struct QVirtioDevice {
     uint16_t device_type;
 } QVirtioDevice;
 
+typedef struct QVirtioBus {
+    uint8_t (*config_readb)(QVirtioDevice *d, void *addr);
+    uint16_t (*config_readw)(QVirtioDevice *d, void *addr);
+    uint32_t (*config_readl)(QVirtioDevice *d, void *addr);
+    uint64_t (*config_readq)(QVirtioDevice *d, void *addr);
+
+    /* Get status of the device */
+    uint8_t (*get_status)(QVirtioDevice *d);
+
+    /* Set status of the device  */
+    void (*set_status)(QVirtioDevice *d, uint8_t status);
+} QVirtioBus;
+
+uint8_t qvirtio_config_readb(const QVirtioBus *bus, QVirtioDevice *d,
+                                                                void *addr);
+uint16_t qvirtio_config_readw(const QVirtioBus *bus, QVirtioDevice *d,
+                                                                void *addr);
+uint32_t qvirtio_config_readl(const QVirtioBus *bus, QVirtioDevice *d,
+                                                                void *addr);
+uint64_t qvirtio_config_readq(const QVirtioBus *bus, QVirtioDevice *d,
+                                                                void *addr);
+
+void qvirtio_reset(const QVirtioBus *bus, QVirtioDevice *d);
+void qvirtio_set_acknowledge(const QVirtioBus *bus, QVirtioDevice *d);
+void qvirtio_set_driver(const QVirtioBus *bus, QVirtioDevice *d);
+
 #endif