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vm-virtio: vhost-user: Vring should be enabled after initialization
As mentioned in the vhost-user specification, each ring is initialized in a stopped state. This means each ring should be enabled only after it has been correctly initialized. Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
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parent
a4ebcf486d
commit
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@ -77,8 +77,6 @@ pub enum Error {
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VhostUserSetVringKick(VhostError),
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VhostUserSetVringKick(VhostError),
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/// Set vring enable failed.
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/// Set vring enable failed.
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VhostUserSetVringEnable(VhostError),
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VhostUserSetVringEnable(VhostError),
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/// Vhost-user setup vring failed.
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VhostUserSetupVringFailed,
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/// Failed to create vhost eventfd.
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/// Failed to create vhost eventfd.
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VhostIrqCreate(io::Error),
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VhostIrqCreate(io::Error),
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/// Failed to read vhost eventfd.
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/// Failed to read vhost eventfd.
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@ -85,6 +85,9 @@ pub fn setup_vhost_user_vring(
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vu.set_vring_kick(queue_index, &queue_evts[queue_index])
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vu.set_vring_kick(queue_index, &queue_evts[queue_index])
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.map_err(Error::VhostUserSetVringKick)?;
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.map_err(Error::VhostUserSetVringKick)?;
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vu.set_vring_enable(queue_index, true)
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.map_err(Error::VhostUserSetVringEnable)?;
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}
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}
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Ok(vu_interrupt_list)
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Ok(vu_interrupt_list)
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@ -97,17 +100,9 @@ pub fn setup_vhost_user(
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queue_evts: Vec<EventFd>,
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queue_evts: Vec<EventFd>,
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acked_features: u64,
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acked_features: u64,
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) -> Result<Vec<(EventFd, Queue)>> {
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) -> Result<Vec<(EventFd, Queue)>> {
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for i in 0..queues.len() {
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vu.set_vring_enable(i, true)
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.map_err(Error::VhostUserSetVringEnable)?;
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}
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let backend_features = vu.get_features().unwrap();
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let backend_features = vu.get_features().unwrap();
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vu.set_features(acked_features & backend_features)
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vu.set_features(acked_features & backend_features)
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.map_err(Error::VhostUserSetFeatures)?;
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.map_err(Error::VhostUserSetFeatures)?;
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match setup_vhost_user_vring(vu, mem, queues, queue_evts) {
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setup_vhost_user_vring(vu, mem, queues, queue_evts)
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Ok(vu_interrupt_list) => Ok(vu_interrupt_list),
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Err(_) => Err(Error::VhostUserSetupVringFailed),
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}
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}
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}
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