According to virtio spec, The device SHOULD set DEVICE_NEEDS_RESET when
it enters an error state that a reset is needed. If DRIVER_OK is set,
after it sets DEVICE_NEEDS_RESET, the device MUST send a device
configuration change notification to the driver.
This patch introduces new api to raise vDPA hardware error and escalates
configuration change to vhost via client message
VHOST_USER_SLAVE_CONFIG_CHANGE_MSG.
The vhost should check DRIVER_OK and decide whether to notify driver.
Signed-off-by: Xueming Li <xuemi...@nvidia.com>
---
lib/librte_vhost/rte_vdpa_dev.h | 12 ++++++++++++
lib/librte_vhost/version.map | 1 +
lib/librte_vhost/vhost_user.c | 14 ++++++++++++++
3 files changed, 27 insertions(+)
diff --git a/lib/librte_vhost/rte_vdpa_dev.h b/lib/librte_vhost/rte_vdpa_dev.h
index a60183f780..87b7397c6f 100644
--- a/lib/librte_vhost/rte_vdpa_dev.h
+++ b/lib/librte_vhost/rte_vdpa_dev.h
@@ -117,6 +117,18 @@ rte_vdpa_unregister_device(struct rte_vdpa_device *dev);
int
rte_vhost_host_notifier_ctrl(int vid, uint16_t qid, bool enable);
+/**
+ * Set device hardware error and notify host.
+ *
+ * @param vid
+ * vhost device id
+ * @return
+ * 0 on success, -1 on failure
+ */
+__rte_experimental
+int
+rte_vhost_host_raise_error(int vid);
+
/**
* Synchronize the used ring from mediated ring to guest, log dirty
* page for each writeable buffer, caller should handle the used
diff --git a/lib/librte_vhost/version.map b/lib/librte_vhost/version.map
index 9183d6f2fc..5a4c5dc818 100644
--- a/lib/librte_vhost/version.map
+++ b/lib/librte_vhost/version.map
@@ -76,4 +76,5 @@ EXPERIMENTAL {
rte_vhost_async_channel_unregister;
rte_vhost_submit_enqueue_burst;
rte_vhost_poll_enqueue_completed;
+ rte_vhost_host_raise_error;
};
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index d20c8c57ad..d8353176f2 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -2992,6 +2992,20 @@ rte_vhost_slave_config_change(int vid, bool need_reply)
return vhost_user_slave_config_change(dev, need_reply);
}
+int
+rte_vhost_host_raise_error(int vid)
+{
+ struct virtio_net *dev;
+
+ dev = get_device(vid);
+ if (!dev)
+ return -ENODEV;
+
+ dev->status |= VIRTIO_DEVICE_STATUS_DEV_NEED_RESET;
+
+ return vhost_user_slave_config_change(dev, 0);
+}
+
static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
int index, int fd,
uint64_t offset,
--
2.25.1
