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vhost: allow to enable or disable features

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Signed-off-by: Huawei Xie <huawei.xie@intel.com>
Acked-by: Changchun Ouyang <changchun.ouyang@intel.com>
[Thomas: split patch]
This commit is contained in:
Huawei Xie 2014-10-09 02:54:51 +08:00 committed by Thomas Monjalon
parent 7202b0a824
commit 9eed6bfd2e
2 changed files with 46 additions and 0 deletions
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15
lib/librte_vhost/rte_virtio_net.h
View File

@ -148,6 +148,21 @@ gpa_to_vva(struct virtio_net *dev, uint64_t guest_pa)
return vhost_va;
}
/**
* Disable features in feature_mask. Returns 0 on success.
*/
int rte_vhost_feature_disable(uint64_t feature_mask);
/**
* Enable features in feature_mask. Returns 0 on success.
*/
int rte_vhost_feature_enable(uint64_t feature_mask);
/* Returns currently supported vhost features */
uint64_t rte_vhost_feature_get(void);
int rte_vhost_enable_guest_notification(struct virtio_net *dev, uint16_t queue_id, int enable);
/* Register vhost driver. dev_name could be different for multiple instance support. */
int rte_vhost_driver_register(const char *dev_name);

31
lib/librte_vhost/virtio-net.c
View File

@ -960,6 +960,37 @@ get_virtio_net_callbacks(void)
return &vhost_device_ops;
}
int rte_vhost_enable_guest_notification(struct virtio_net *dev, uint16_t queue_id, int enable)
{
if (enable) {
RTE_LOG(ERR, VHOST_CONFIG, "guest notification isn't supported.\n");
return -1;
}
dev->virtqueue[queue_id]->used->flags = enable ? 0 : VRING_USED_F_NO_NOTIFY;
return 0;
}
uint64_t rte_vhost_feature_get(void)
{
return VHOST_FEATURES;
}
int rte_vhost_feature_disable(uint64_t feature_mask)
{
VHOST_FEATURES = VHOST_FEATURES & ~feature_mask;
return 0;
}
int rte_vhost_feature_enable(uint64_t feature_mask)
{
if ((feature_mask & VHOST_SUPPORTED_FEATURES) == feature_mask) {
VHOST_FEATURES = VHOST_FEATURES | feature_mask;
return 0;
}
return -1;
}
/*
* Register ops so that we can add/remove device to data core.
*/