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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

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Pull virtio updates from Michael Tsirkin:

 - enable packed ring support for s390

 - several fixes

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio/s390: enable packed ring
  virtio/s390: DMA support for virtio-ccw
  virtio/s390: use vring_create_virtqueue
  virtio/virtio_ring: do some comment fixes
  vhost-scsi: remove incorrect memory barrier
  tools/virtio/ringtest: Remove bogus definition of BUG_ON()
  virtio_ring: Fix potential mem leak in virtqueue_add_indirect_packed
This commit is contained in:
Linus Torvalds
2019-05-14 14:12:59 -07:00
parent 814137768b 050f4c4d2f
commit 35c99ffa20
5 changed files with 40 additions and 59 deletions
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52
drivers/s390/virtio/virtio_ccw.c
View File

@@ -66,6 +66,7 @@ struct virtio_ccw_device {
bool device_lost;
unsigned int config_ready;
void *airq_info;
u64 dma_mask;
};
struct vq_info_block_legacy {
@@ -108,7 +109,6 @@ struct virtio_rev_info {
struct virtio_ccw_vq_info {
struct virtqueue *vq;
int num;
void *queue;
union {
struct vq_info_block s;
struct vq_info_block_legacy l;
@@ -423,7 +423,6 @@ static void virtio_ccw_del_vq(struct virtqueue *vq, struct ccw1 *ccw)
struct virtio_ccw_device *vcdev = to_vc_device(vq->vdev);
struct virtio_ccw_vq_info *info = vq->priv;
unsigned long flags;
unsigned long size;
int ret;
unsigned int index = vq->index;
@@ -461,8 +460,6 @@ static void virtio_ccw_del_vq(struct virtqueue *vq, struct ccw1 *ccw)
ret, index);
vring_del_virtqueue(vq);
size = PAGE_ALIGN(vring_size(info->num, KVM_VIRTIO_CCW_RING_ALIGN));
free_pages_exact(info->queue, size);
kfree(info->info_block);
kfree(info);
}
@@ -494,8 +491,9 @@ static struct virtqueue *virtio_ccw_setup_vq(struct virtio_device *vdev,
int err;
struct virtqueue *vq = NULL;
struct virtio_ccw_vq_info *info;
unsigned long size = 0; /* silence the compiler */
u64 queue;
unsigned long flags;
bool may_reduce;
/* Allocate queue. */
info = kzalloc(sizeof(struct virtio_ccw_vq_info), GFP_KERNEL);
@@ -516,37 +514,34 @@ static struct virtqueue *virtio_ccw_setup_vq(struct virtio_device *vdev,
err = info->num;
goto out_err;
}
size = PAGE_ALIGN(vring_size(info->num, KVM_VIRTIO_CCW_RING_ALIGN));
info->queue = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
if (info->queue == NULL) {
dev_warn(&vcdev->cdev->dev, "no queue\n");
err = -ENOMEM;
goto out_err;
}
may_reduce = vcdev->revision > 0;
vq = vring_create_virtqueue(i, info->num, KVM_VIRTIO_CCW_RING_ALIGN,
vdev, true, may_reduce, ctx,
virtio_ccw_kvm_notify, callback, name);
vq = vring_new_virtqueue(i, info->num, KVM_VIRTIO_CCW_RING_ALIGN, vdev,
true, ctx, info->queue, virtio_ccw_kvm_notify,
callback, name);
if (!vq) {
/* For now, we fail if we can't get the requested size. */
dev_warn(&vcdev->cdev->dev, "no vq\n");
err = -ENOMEM;
goto out_err;
}
/* it may have been reduced */
info->num = virtqueue_get_vring_size(vq);
/* Register it with the host. */
queue = virtqueue_get_desc_addr(vq);
if (vcdev->revision == 0) {
info->info_block->l.queue = (__u64)info->queue;
info->info_block->l.queue = queue;
info->info_block->l.align = KVM_VIRTIO_CCW_RING_ALIGN;
info->info_block->l.index = i;
info->info_block->l.num = info->num;
ccw->count = sizeof(info->info_block->l);
} else {
info->info_block->s.desc = (__u64)info->queue;
info->info_block->s.desc = queue;
info->info_block->s.index = i;
info->info_block->s.num = info->num;
info->info_block->s.avail = (__u64)virtqueue_get_avail(vq);
info->info_block->s.used = (__u64)virtqueue_get_used(vq);
info->info_block->s.avail = (__u64)virtqueue_get_avail_addr(vq);
info->info_block->s.used = (__u64)virtqueue_get_used_addr(vq);
ccw->count = sizeof(info->info_block->s);
}
ccw->cmd_code = CCW_CMD_SET_VQ;
@@ -572,8 +567,6 @@ out_err:
if (vq)
vring_del_virtqueue(vq);
if (info) {
if (info->queue)
free_pages_exact(info->queue, size);
kfree(info->info_block);
}
kfree(info);
@@ -780,12 +773,8 @@ out_free:
static void ccw_transport_features(struct virtio_device *vdev)
{
/*
* Packed ring isn't enabled on virtio_ccw for now,
* because virtio_ccw uses some legacy accessors,
* e.g. virtqueue_get_avail() and virtqueue_get_used()
* which aren't available in packed ring currently.
* Currently nothing to do here.
*/
__virtio_clear_bit(vdev, VIRTIO_F_RING_PACKED);
}
static int virtio_ccw_finalize_features(struct virtio_device *vdev)
@@ -1266,6 +1255,16 @@ static int virtio_ccw_online(struct ccw_device *cdev)
ret = -ENOMEM;
goto out_free;
}
vcdev->vdev.dev.parent = &cdev->dev;
cdev->dev.dma_mask = &vcdev->dma_mask;
/* we are fine with common virtio infrastructure using 64 bit DMA */
ret = dma_set_mask_and_coherent(&cdev->dev, DMA_BIT_MASK(64));
if (ret) {
dev_warn(&cdev->dev, "Failed to enable 64-bit DMA.\n");
goto out_free;
}
vcdev->config_block = kzalloc(sizeof(*vcdev->config_block),
GFP_DMA | GFP_KERNEL);
if (!vcdev->config_block) {
@@ -1280,7 +1279,6 @@ static int virtio_ccw_online(struct ccw_device *cdev)
vcdev->is_thinint = virtio_ccw_use_airq; /* at least try */
vcdev->vdev.dev.parent = &cdev->dev;
vcdev->vdev.dev.release = virtio_ccw_release_dev;
vcdev->vdev.config = &virtio_ccw_config_ops;
vcdev->cdev = cdev;