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authorAnthony Liguori <aliguori@us.ibm.com>2008-01-28 09:59:59 -0600
committerRusty Russell <rusty@rustcorp.com.au>2008-02-04 23:50:12 +1100
commit55a7c066041e7850948d29ed813f62821a9ec046 (patch)
treeea4ef20c8014d5222957cef83d4fc62b75c58fd6 /include/linux/virtio_pci.h
parent3343660d8c62c6b00b2f15324ef3fcb6be207bfa (diff)
virtio: Use PCI revision field to indicate virtio PCI ABI version
As Avi pointed out, as we continue to massage the virtio PCI ABI, we can make things a little more friendly to users by utilizing the PCI revision field to indicate which version of the ABI we're using. This is a hard ABI version and incrementing it will cause the guest driver to break. This is the necessary changes to virtio_pci to support this. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/virtio_pci.h')
-rw-r--r--include/linux/virtio_pci.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/virtio_pci.h b/include/linux/virtio_pci.h
index 860eb37bfa07..b3151659cf49 100644
--- a/include/linux/virtio_pci.h
+++ b/include/linux/virtio_pci.h
@@ -52,4 +52,6 @@
* configuration space */
#define VIRTIO_PCI_CONFIG 20
+/* Virtio ABI version, this must match exactly */
+#define VIRTIO_PCI_ABI_VERSION 0
#endif