5 files changed, 34 insertions, 7 deletions

diff --git a/include/linux/lguest_launcher.h b/include/linux/lguest_launcher.h
index e7217dc58f39..a53407a4165c 100644
--- a/include/linux/lguest_launcher.h
+++ b/include/linux/lguest_launcher.h
@@ -54,9 +54,13 @@ struct lguest_vqconfig {
 /* Write command first word is a request. */
 enum lguest_req
 {
-        LHREQ_INITIALIZE, /* + base, pfnlimit, pgdir, start */
+        LHREQ_INITIALIZE, /* + base, pfnlimit, start */
         LHREQ_GETDMA, /* No longer used */
         LHREQ_IRQ, /* + irq */
         LHREQ_BREAK, /* + on/off flag (on blocks until someone does off) */
 };
+
+/* The alignment to use between consumer and producer parts of vring.
+ * x86 pagesize for historical reasons. */
+#define LGUEST_VRING_ALIGN      4096
 #endif /* _LINUX_LGUEST_LAUNCHER */
diff --git a/include/linux/virtio_balloon.h b/include/linux/virtio_balloon.h
index c30c7bfbf39b..8726ff77763e 100644
--- a/include/linux/virtio_balloon.h
+++ b/include/linux/virtio_balloon.h
@@ -10,6 +10,9 @@
 /* The feature bitmap for virtio balloon */
 #define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */
 
+/* Size of a PFN in the balloon interface. */
+#define VIRTIO_BALLOON_PFN_SHIFT 12
+
 struct virtio_balloon_config
 {
         /* Number of pages host wants Guest to give up. */
diff --git a/include/linux/virtio_console.h b/include/linux/virtio_console.h
index 19a0da0dba41..7615ffcdd555 100644
--- a/include/linux/virtio_console.h
+++ b/include/linux/virtio_console.h
@@ -7,6 +7,17 @@
 /* The ID for virtio console */
 #define VIRTIO_ID_CONSOLE       3
 
+/* Feature bits */
+#define VIRTIO_CONSOLE_F_SIZE   0       /* Does host provide console size? */
+
+struct virtio_console_config {
+        /* colums of the screens */
+        __u16 cols;
+        /* rows of the screens */
+        __u16 rows;
+} __attribute__((packed));
+
+
 #ifdef __KERNEL__
 int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int));
 #endif /* __KERNEL__ */
diff --git a/include/linux/virtio_pci.h b/include/linux/virtio_pci.h
index cdef35742932..cd0fd5d181a6 100644
--- a/include/linux/virtio_pci.h
+++ b/include/linux/virtio_pci.h
@@ -53,4 +53,12 @@
 
 /* Virtio ABI version, this must match exactly */
 #define VIRTIO_PCI_ABI_VERSION          0
+
+/* How many bits to shift physical queue address written to QUEUE_PFN.
+ * 12 is historical, and due to x86 page size. */
+#define VIRTIO_PCI_QUEUE_ADDR_SHIFT     12
+
+/* The alignment to use between consumer and producer parts of vring.
+ * x86 pagesize again. */
+#define VIRTIO_PCI_VRING_ALIGN          4096
 #endif
diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h
index c4a598fb3826..71e03722fb59 100644
--- a/include/linux/virtio_ring.h
+++ b/include/linux/virtio_ring.h
@@ -83,7 +83,7 @@ struct vring {
  *      __u16 avail_idx;
  *      __u16 available[num];
  *
- *      // Padding to the next page boundary.
+ *      // Padding to the next align boundary.
  *      char pad[];
  *
  *      // A ring of used descriptor heads with free-running index.
@@ -93,19 +93,19 @@ struct vring {
  * };
  */
 static inline void vring_init(struct vring *vr, unsigned int num, void *p,
-                              unsigned long pagesize)
+                              unsigned long align)
 {
         vr->num = num;
         vr->desc = p;
         vr->avail = p + num*sizeof(struct vring_desc);
-        vr->used = (void *)(((unsigned long)&vr->avail->ring[num] + pagesize-1)
-                            & ~(pagesize - 1));
+        vr->used = (void *)(((unsigned long)&vr->avail->ring[num] + align-1)
+                            & ~(align - 1));
 }
 
-static inline unsigned vring_size(unsigned int num, unsigned long pagesize)
+static inline unsigned vring_size(unsigned int num, unsigned long align)
 {
         return ((sizeof(struct vring_desc) * num + sizeof(__u16) * (2 + num)
-                 + pagesize - 1) & ~(pagesize - 1))
+                 + align - 1) & ~(align - 1))
                 + sizeof(__u16) * 2 + sizeof(struct vring_used_elem) * num;
 }
 
@@ -115,6 +115,7 @@ struct virtio_device;
 struct virtqueue;
 
 struct virtqueue *vring_new_virtqueue(unsigned int num,
+                                      unsigned int vring_align,
                                       struct virtio_device *vdev,
                                       void *pages,
                                       void (*notify)(struct virtqueue *vq),