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virtio: Use PCI revision field to indicate virtio PCI ABI version

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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>
This commit is contained in:
Anthony Liguori
2008-01-28 09:59:59 -06:00
committed by Rusty Russell
parent 3343660d8c
commit 55a7c06604
2 changed files with 8 additions and 0 deletions
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include/linux/virtio_pci.h
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@@ -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