af53db4867
IOTLB entries contain the host virtual address of the guest
pages. When receiving a new VHOST_USER_SET_MEM_TABLE request,
the previous regions get unmapped, so the IOTLB entries, if any,
will be invalid. It does cause the vhost-user process to
segfault.
This patch introduces a new function to flush the IOTLB cache,
and call it as soon as the backend handles a VHOST_USER_SET_MEM
request.
Fixes: 69c90e98f4 ("vhost: enable IOMMU support")
Cc: stable@dpdk.org
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Jens Freimann <jfreimann@redhat.com>
80 lines
3.0 KiB
C
80 lines
3.0 KiB
C
/*-
|
|
* BSD LICENSE
|
|
*
|
|
* Copyright (c) 2017 Red Hat, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* * Neither the name of Intel Corporation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
#ifndef _VHOST_IOTLB_H_
|
|
#define _VHOST_IOTLB_H_
|
|
|
|
#include <stdbool.h>
|
|
|
|
#include "vhost.h"
|
|
|
|
static __rte_always_inline void
|
|
vhost_user_iotlb_rd_lock(struct vhost_virtqueue *vq)
|
|
{
|
|
rte_rwlock_read_lock(&vq->iotlb_lock);
|
|
}
|
|
|
|
static __rte_always_inline void
|
|
vhost_user_iotlb_rd_unlock(struct vhost_virtqueue *vq)
|
|
{
|
|
rte_rwlock_read_unlock(&vq->iotlb_lock);
|
|
}
|
|
|
|
static __rte_always_inline void
|
|
vhost_user_iotlb_wr_lock(struct vhost_virtqueue *vq)
|
|
{
|
|
rte_rwlock_write_lock(&vq->iotlb_lock);
|
|
}
|
|
|
|
static __rte_always_inline void
|
|
vhost_user_iotlb_wr_unlock(struct vhost_virtqueue *vq)
|
|
{
|
|
rte_rwlock_write_unlock(&vq->iotlb_lock);
|
|
}
|
|
|
|
void vhost_user_iotlb_cache_insert(struct vhost_virtqueue *vq, uint64_t iova,
|
|
uint64_t uaddr, uint64_t size,
|
|
uint8_t perm);
|
|
void vhost_user_iotlb_cache_remove(struct vhost_virtqueue *vq,
|
|
uint64_t iova, uint64_t size);
|
|
uint64_t vhost_user_iotlb_cache_find(struct vhost_virtqueue *vq, uint64_t iova,
|
|
uint64_t *size, uint8_t perm);
|
|
bool vhost_user_iotlb_pending_miss(struct vhost_virtqueue *vq, uint64_t iova,
|
|
uint8_t perm);
|
|
void vhost_user_iotlb_pending_insert(struct vhost_virtqueue *vq, uint64_t iova,
|
|
uint8_t perm);
|
|
void vhost_user_iotlb_pending_remove(struct vhost_virtqueue *vq, uint64_t iova,
|
|
uint64_t size, uint8_t perm);
|
|
void vhost_user_iotlb_flush_all(struct vhost_virtqueue *vq);
|
|
int vhost_user_iotlb_init(struct virtio_net *dev, int vq_index);
|
|
|
|
#endif /* _VHOST_IOTLB_H_ */
|