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vhost: handle IOTLB update and invalidate requests

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Vhost-user device IOTLB protocol extension introduces
VHOST_USER_IOTLB message type. The associated payload is the
vhost_iotlb_msg struct defined in Kernel, which in this was can
be either an IOTLB update or invalidate message.

On IOTLB update, the virtqueues get notified of a new entry.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Acked-by: Yuanhan Liu <yliu@fridaylinux.org>
This commit is contained in:
Maxime Coquelin 2017-10-05 10:36:18 +02:00 committed by Yuanhan Liu
parent 76e99bfc4c
commit e95f34d380
2 changed files with 44 additions and 0 deletions
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43
lib/librte_vhost/vhost_user.c
View File

@ -48,6 +48,7 @@
#include <rte_malloc.h>
#include <rte_log.h>
#include "iotlb.h"
#include "vhost.h"
#include "vhost_user.h"
@ -77,6 +78,7 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
[VHOST_USER_SEND_RARP] = "VHOST_USER_SEND_RARP",
[VHOST_USER_NET_SET_MTU] = "VHOST_USER_NET_SET_MTU",
[VHOST_USER_SET_SLAVE_REQ_FD] = "VHOST_USER_SET_SLAVE_REQ_FD",
[VHOST_USER_IOTLB_MSG] = "VHOST_USER_IOTLB_MSG",
};
static uint64_t
@ -909,6 +911,43 @@ vhost_user_set_req_fd(struct virtio_net *dev, struct VhostUserMsg *msg)
return 0;
}
static int
vhost_user_iotlb_msg(struct virtio_net *dev, struct VhostUserMsg *msg)
{
struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
uint16_t i;
uint64_t vva;
switch (imsg->type) {
case VHOST_IOTLB_UPDATE:
vva = qva_to_vva(dev, imsg->uaddr);
if (!vva)
return -1;
for (i = 0; i < dev->nr_vring; i++) {
struct vhost_virtqueue *vq = dev->virtqueue[i];
vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
imsg->size, imsg->perm);
}
break;
case VHOST_IOTLB_INVALIDATE:
for (i = 0; i < dev->nr_vring; i++) {
struct vhost_virtqueue *vq = dev->virtqueue[i];
vhost_user_iotlb_cache_remove(vq, imsg->iova,
imsg->size);
}
break;
default:
RTE_LOG(ERR, VHOST_CONFIG, "Invalid IOTLB message type (%d)\n",
imsg->type);
return -1;
}
return 0;
}
/* return bytes# of read on success or negative val on failure. */
static int
read_vhost_message(int sockfd, struct VhostUserMsg *msg)
@ -1140,6 +1179,10 @@ vhost_user_msg_handler(int vid, int fd)
ret = vhost_user_set_req_fd(dev, &msg);
break;
case VHOST_USER_IOTLB_MSG:
ret = vhost_user_iotlb_msg(dev, &msg);
break;
default:
ret = -1;
break;

1
lib/librte_vhost/vhost_user.h
View File

@ -80,6 +80,7 @@ typedef enum VhostUserRequest {
VHOST_USER_SEND_RARP = 19,
VHOST_USER_NET_SET_MTU = 20,
VHOST_USER_SET_SLAVE_REQ_FD = 21,
VHOST_USER_IOTLB_MSG = 22,
VHOST_USER_MAX
} VhostUserRequest;