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virtio: Don't use PAGE_SIZE in virtio_pci.c

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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>
This commit is contained in:
Rusty Russell 2008-12-30 09:25:56 -06:00
parent 99e0b6c8e3
commit 480daab42c
2 changed files with 5 additions and 1 deletions
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2
drivers/virtio/virtio_pci.c
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@ -245,7 +245,7 @@ static struct virtqueue *vp_find_vq(struct virtio_device *vdev, unsigned index,
}
/* activate the queue */
iowrite32(virt_to_phys(info->queue) >> PAGE_SHIFT,
iowrite32(virt_to_phys(info->queue) >> VIRTIO_PCI_QUEUE_ADDR_SHIFT,
vp_dev->ioaddr + VIRTIO_PCI_QUEUE_PFN);
/* create the vring */

4
include/linux/virtio_pci.h
View File

@ -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