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authorRusty Russell <rusty@rustcorp.com.au>2008-12-30 18:25:56 +0300
committerRusty Russell <rusty@rustcorp.com.au>2008-12-30 01:55:57 +0300
commit480daab42c4dd74b3c07031ddf9031251c530c77 (patch)
treec491b040071be3867aa42942a80435866fbc85cf /include/linux/virtio_pci.h
parent99e0b6c8e3f30602383bcfe3f574537a02ee2bea (diff)
downloadlinux-480daab42c4dd74b3c07031ddf9031251c530c77.tar.xz
virtio: Don't use PAGE_SIZE in virtio_pci.c
The virtio PCI devices don't depend on the guest page size. This matters now PowerPC virtio is gaining ground (they like 64k pages). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/virtio_pci.h')
-rw-r--r--include/linux/virtio_pci.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/virtio_pci.h b/include/linux/virtio_pci.h
index cdef35742932..e13d7ebcf576 100644
--- a/include/linux/virtio_pci.h
+++ b/include/linux/virtio_pci.h
@@ -53,4 +53,8 @@
/* 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
#endif