updated virtio block device to partially handle non-aligned IO requests

[palacios.git] / palacios / include / devices / lnx_virtio_pci.h

diff --git a/palacios/include/devices/lnx_virtio_pci.h b/palacios/include/devices/lnx_virtio_pci.h
index e48df2c..f0c5e3d 100644 (file)
--- a/palacios/include/devices/lnx_virtio_pci.h
+++ b/palacios/include/devices/lnx_virtio_pci.h
@@ -91,14 +91,19 @@
  * 
  */
 struct virtio_config {
-    uint32_t host_features;
-    uint32_t guest_features;
-    uint32_t vring_page_num;
-    uint16_t vring_ring_size;
-    uint16_t vring_queue_selector;
-    uint16_t vring_queue_notifier;
-    uint8_t status;
-    uint8_t pci_isr;
+    union {
+       uint8_t buf[20];
+       struct {
+           uint32_t host_features;
+           uint32_t guest_features;
+           uint32_t vring_page_num;
+           uint16_t vring_ring_size;
+           uint16_t vring_queue_selector;
+           uint16_t vring_queue_notifier;
+           uint8_t status;
+           uint8_t pci_isr;
+       } __attribute__((packed));
+    } __attribute__((packed));
 } __attribute__((packed));