diff options
| -rw-r--r-- | drivers/virtio/virtio_pci.c | 2 | ||||
| -rw-r--r-- | include/linux/virtio_pci.h | 4 |
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index e37d686edfe..c2cd69ba0a8 100644 --- a/drivers/virtio/virtio_pci.c +++ b/drivers/virtio/virtio_pci.c @@ -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 */ diff --git a/include/linux/virtio_pci.h b/include/linux/virtio_pci.h index cdef3574293..e13d7ebcf57 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 |