From 87c7d57c17ade5024d95b6ca0da249da49b0672a Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Tue, 30 Dec 2008 09:26:03 -0600 Subject: [PATCH] virtio: hand virtio ring alignment as argument to vring_new_virtqueue This allows each virtio user to hand in the alignment appropriate to their virtio_ring structures. Signed-off-by: Rusty Russell Acked-by: Christian Borntraeger --- drivers/lguest/lguest_device.c | 4 ++-- drivers/s390/kvm/kvm_virtio.c | 3 ++- drivers/virtio/virtio_pci.c | 4 ++-- drivers/virtio/virtio_ring.c | 3 ++- include/linux/virtio_ring.h | 1 + 5 files changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c index f062dc55c57..b02f6bcb64c 100644 --- a/drivers/lguest/lguest_device.c +++ b/drivers/lguest/lguest_device.c @@ -259,8 +259,8 @@ static struct virtqueue *lg_find_vq(struct virtio_device *vdev, /* OK, tell virtio_ring.c to set up a virtqueue now we know its size * and we've got a pointer to its pages. */ - vq = vring_new_virtqueue(lvq->config.num, vdev, lvq->pages, - lg_notify, callback); + vq = vring_new_virtqueue(lvq->config.num, LGUEST_VRING_ALIGN, + vdev, lvq->pages, lg_notify, callback); if (!vq) { err = -ENOMEM; goto unmap; diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c index f5a2dbe7557..4e8354aa857 100644 --- a/drivers/s390/kvm/kvm_virtio.c +++ b/drivers/s390/kvm/kvm_virtio.c @@ -193,7 +193,8 @@ static struct virtqueue *kvm_find_vq(struct virtio_device *vdev, if (err) goto out; - vq = vring_new_virtqueue(config->num, vdev, (void *) config->address, + vq = vring_new_virtqueue(config->num, KVM_S390_VIRTIO_RING_ALIGN, + vdev, (void *) config->address, kvm_notify, callback); if (!vq) { err = -ENOMEM; diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index f28643f3a4e..7462a51e820 100644 --- a/drivers/virtio/virtio_pci.c +++ b/drivers/virtio/virtio_pci.c @@ -249,8 +249,8 @@ static struct virtqueue *vp_find_vq(struct virtio_device *vdev, unsigned index, vp_dev->ioaddr + VIRTIO_PCI_QUEUE_PFN); /* create the vring */ - vq = vring_new_virtqueue(info->num, vdev, info->queue, - vp_notify, callback); + vq = vring_new_virtqueue(info->num, VIRTIO_PCI_VRING_ALIGN, + vdev, info->queue, vp_notify, callback); if (!vq) { err = -ENOMEM; goto out_activate_queue; diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 6eb5303fed1..5777196bf6c 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -274,6 +274,7 @@ static struct virtqueue_ops vring_vq_ops = { }; struct virtqueue *vring_new_virtqueue(unsigned int num, + unsigned int vring_align, struct virtio_device *vdev, void *pages, void (*notify)(struct virtqueue *), @@ -292,7 +293,7 @@ struct virtqueue *vring_new_virtqueue(unsigned int num, if (!vq) return NULL; - vring_init(&vq->vring, num, pages, PAGE_SIZE); + vring_init(&vq->vring, num, pages, vring_align); vq->vq.callback = callback; vq->vq.vdev = vdev; vq->vq.vq_ops = &vring_vq_ops; diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h index 01bf3124e31..71e03722fb5 100644 --- a/include/linux/virtio_ring.h +++ b/include/linux/virtio_ring.h @@ -115,6 +115,7 @@ struct virtio_device; struct virtqueue; struct virtqueue *vring_new_virtqueue(unsigned int num, + unsigned int vring_align, struct virtio_device *vdev, void *pages, void (*notify)(struct virtqueue *vq), -- 2.41.1