From: Adrian Moreno <amorenoz@redhat.com>
To: dev@dpdk.org
Cc: Adrian Moreno <amorenoz@redhat.com>,
maxime.coquelin@redhat.com, stable@dpdk.org
Subject: [dpdk-dev] [PATCH] vhost: fix vring memory partially mapped
Date: Fri, 6 Sep 2019 14:50:20 +0200 [thread overview]
Message-ID: <20190906125020.23276-1-amorenoz@redhat.com> (raw)
Only the mapping of the vring addresses is being ensured. This causes
errors when the vring size is larger than the IOTLB page size. E.g:
queue sizes > 256 for 4K IOTLB pages
Ensure the entire vring memory range gets mapped. Refactor duplicated
code for for IOTLB UPDATE and IOTLB INVALIDATE and add packed virtqueue
support.
Fixes: 09927b524969 ("vhost: translate ring addresses when IOMMU enabled")
Cc: maxime.coquelin@redhat.com
Cc: stable@dpdk.org
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
---
lib/librte_vhost/vhost_user.c | 64 +++++++++++++++++++++--------------
1 file changed, 39 insertions(+), 25 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 0b72648a5..168ad9e0f 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -558,11 +558,13 @@ ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
{
if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
uint64_t vva;
+ uint64_t req_size = *size;
vva = vhost_user_iotlb_cache_find(vq, ra,
size, VHOST_ACCESS_RW);
- if (!vva)
- vhost_user_iotlb_miss(dev, ra, VHOST_ACCESS_RW);
+ if (req_size != *size)
+ vhost_user_iotlb_miss(dev, (ra + *size),
+ VHOST_ACCESS_RW);
return vva;
}
@@ -1570,54 +1572,66 @@ vhost_user_set_req_fd(struct virtio_net **pdev, struct VhostUserMsg *msg,
}
static int
-is_vring_iotlb_update(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
+is_vring_iotlb_split(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
{
struct vhost_vring_addr *ra;
- uint64_t start, end;
+ uint64_t start, end, len;
start = imsg->iova;
end = start + imsg->size;
ra = &vq->ring_addrs;
- if (ra->desc_user_addr >= start && ra->desc_user_addr < end)
+ len = sizeof(struct vring_desc) * vq->size;
+ if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
return 1;
- if (ra->avail_user_addr >= start && ra->avail_user_addr < end)
+
+ len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
+ if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
return 1;
- if (ra->used_user_addr >= start && ra->used_user_addr < end)
+
+ len = sizeof(struct vring_used) +
+ sizeof(struct vring_used_elem) * vq->size;
+ if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
return 1;
return 0;
}
static int
-is_vring_iotlb_invalidate(struct vhost_virtqueue *vq,
- struct vhost_iotlb_msg *imsg)
+is_vring_iotlb_packed(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
{
- uint64_t istart, iend, vstart, vend;
+ struct vhost_vring_addr *ra;
+ uint64_t start, end, len;
- istart = imsg->iova;
- iend = istart + imsg->size - 1;
+ start = imsg->iova;
+ end = start + imsg->size;
- vstart = (uintptr_t)vq->desc;
- vend = vstart + sizeof(struct vring_desc) * vq->size - 1;
- if (vstart <= iend && istart <= vend)
+ ra = &vq->ring_addrs;
+ len = sizeof(struct vring_packed_desc) * vq->size;
+ if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
return 1;
- vstart = (uintptr_t)vq->avail;
- vend = vstart + sizeof(struct vring_avail);
- vend += sizeof(uint16_t) * vq->size - 1;
- if (vstart <= iend && istart <= vend)
+ len = sizeof(struct vring_packed_desc_event);
+ if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
return 1;
- vstart = (uintptr_t)vq->used;
- vend = vstart + sizeof(struct vring_used);
- vend += sizeof(struct vring_used_elem) * vq->size - 1;
- if (vstart <= iend && istart <= vend)
+ len = sizeof(struct vring_packed_desc_event);
+ if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
return 1;
return 0;
}
+static int is_vring_iotlb(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ struct vhost_iotlb_msg *imsg)
+{
+ if (vq_is_packed(dev))
+ return is_vring_iotlb_packed(vq, imsg);
+ else
+ return is_vring_iotlb_split(vq, imsg);
+}
+
static int
vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
@@ -1640,7 +1654,7 @@ vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
len, imsg->perm);
- if (is_vring_iotlb_update(vq, imsg))
+ if (is_vring_iotlb(dev, vq, imsg))
*pdev = dev = translate_ring_addresses(dev, i);
}
break;
@@ -1651,7 +1665,7 @@ vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
vhost_user_iotlb_cache_remove(vq, imsg->iova,
imsg->size);
- if (is_vring_iotlb_invalidate(vq, imsg))
+ if (is_vring_iotlb(dev, vq, imsg))
vring_invalidate(dev, vq);
}
break;
--
2.21.0
next reply other threads:[~2019-09-06 12:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-06 12:50 Adrian Moreno [this message]
2019-09-17 19:03 ` Adrian Moreno
2019-09-27 9:58 ` Maxime Coquelin
2019-09-24 11:58 ` Maxime Coquelin
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