mirror of
https://github.com/cloud-hypervisor/cloud-hypervisor.git
synced 2024-12-22 13:45:20 +00:00
virtio-devices: iommu: Port to VirtioCommon
Use VirtioCommon to handle activate() preparation, reset() and Pausable. Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford
parent
f6b75c683f
commit
376babb21e
@ -11,7 +11,6 @@ use super::{
|
||||
use crate::seccomp_filters::{get_seccomp_filter, Thread};
|
||||
use crate::{DmaRemapping, VirtioInterrupt, VirtioInterruptType};
|
||||
use anyhow::anyhow;
|
||||
use libc::EFD_NONBLOCK;
|
||||
use seccomp::{SeccompAction, SeccompFilter};
|
||||
use std::collections::BTreeMap;
|
||||
use std::fmt::{self, Display};
|
||||
@ -20,7 +19,7 @@ use std::mem::size_of;
|
||||
use std::ops::Bound::Included;
|
||||
use std::os::unix::io::AsRawFd;
|
||||
use std::result;
|
||||
use std::sync::atomic::{AtomicBool, Ordering};
|
||||
use std::sync::atomic::AtomicBool;
|
||||
use std::sync::{Arc, Barrier, RwLock};
|
||||
use std::thread;
|
||||
use vfio_ioctls::ExternalDmaMapping;
|
||||
@ -738,17 +737,10 @@ impl DmaRemapping for IommuMapping {
|
||||
pub struct Iommu {
|
||||
common: VirtioCommon,
|
||||
id: String,
|
||||
kill_evt: Option<EventFd>,
|
||||
pause_evt: Option<EventFd>,
|
||||
config: VirtioIommuConfig,
|
||||
config_topo_pci_ranges: Vec<VirtioIommuTopoPciRange>,
|
||||
mapping: Arc<IommuMapping>,
|
||||
ext_mapping: BTreeMap<u32, Arc<dyn ExternalDmaMapping>>,
|
||||
queue_evts: Option<Vec<EventFd>>,
|
||||
interrupt_cb: Option<Arc<dyn VirtioInterrupt>>,
|
||||
epoll_threads: Option<Vec<thread::JoinHandle<()>>>,
|
||||
paused: Arc<AtomicBool>,
|
||||
paused_sync: Arc<Barrier>,
|
||||
seccomp_action: SeccompAction,
|
||||
}
|
||||
|
||||
@ -776,23 +768,19 @@ impl Iommu {
|
||||
Ok((
|
||||
Iommu {
|
||||
id,
|
||||
kill_evt: None,
|
||||
pause_evt: None,
|
||||
common: VirtioCommon {
|
||||
device_type: VirtioDeviceType::TYPE_IOMMU as u32,
|
||||
queue_sizes: QUEUE_SIZES.to_vec(),
|
||||
avail_features: 1u64 << VIRTIO_F_VERSION_1
|
||||
| 1u64 << VIRTIO_IOMMU_F_MAP_UNMAP
|
||||
| 1u64 << VIRTIO_IOMMU_F_PROBE,
|
||||
paused_sync: Some(Arc::new(Barrier::new(2))),
|
||||
..Default::default()
|
||||
},
|
||||
config,
|
||||
config_topo_pci_ranges: Vec::new(),
|
||||
mapping: mapping.clone(),
|
||||
ext_mapping: BTreeMap::new(),
|
||||
queue_evts: None,
|
||||
interrupt_cb: None,
|
||||
epoll_threads: None,
|
||||
paused: Arc::new(AtomicBool::new(false)),
|
||||
paused_sync: Arc::new(Barrier::new(2)),
|
||||
seccomp_action,
|
||||
},
|
||||
mapping,
|
||||
@ -863,7 +851,7 @@ impl Iommu {
|
||||
|
||||
impl Drop for Iommu {
|
||||
fn drop(&mut self) {
|
||||
if let Some(kill_evt) = self.kill_evt.take() {
|
||||
if let Some(kill_evt) = self.common.kill_evt.take() {
|
||||
// Ignore the result because there is nothing we can do about it.
|
||||
let _ = kill_evt.write(1);
|
||||
}
|
||||
@ -872,11 +860,11 @@ impl Drop for Iommu {
|
||||
|
||||
impl VirtioDevice for Iommu {
|
||||
fn device_type(&self) -> u32 {
|
||||
VirtioDeviceType::TYPE_IOMMU as u32
|
||||
self.common.device_type
|
||||
}
|
||||
|
||||
fn queue_max_sizes(&self) -> &[u16] {
|
||||
QUEUE_SIZES
|
||||
&self.common.queue_sizes
|
||||
}
|
||||
|
||||
fn features(&self) -> u64 {
|
||||
@ -904,46 +892,27 @@ impl VirtioDevice for Iommu {
|
||||
queues: Vec<Queue>,
|
||||
queue_evts: Vec<EventFd>,
|
||||
) -> ActivateResult {
|
||||
if queues.len() != NUM_QUEUES || queue_evts.len() != NUM_QUEUES {
|
||||
error!(
|
||||
"Cannot perform activate. Expected {} queue(s), got {}",
|
||||
NUM_QUEUES,
|
||||
queues.len()
|
||||
);
|
||||
return Err(ActivateError::BadActivate);
|
||||
}
|
||||
|
||||
let (self_kill_evt, kill_evt) = EventFd::new(EFD_NONBLOCK)
|
||||
.and_then(|e| Ok((e.try_clone()?, e)))
|
||||
self.common.activate(&queues, &queue_evts, &interrupt_cb)?;
|
||||
let kill_evt = self
|
||||
.common
|
||||
.kill_evt
|
||||
.as_ref()
|
||||
.unwrap()
|
||||
.try_clone()
|
||||
.map_err(|e| {
|
||||
error!("failed creating kill EventFd pair: {}", e);
|
||||
error!("failed to clone kill_evt eventfd: {}", e);
|
||||
ActivateError::BadActivate
|
||||
})?;
|
||||
self.kill_evt = Some(self_kill_evt);
|
||||
|
||||
let (self_pause_evt, pause_evt) = EventFd::new(EFD_NONBLOCK)
|
||||
.and_then(|e| Ok((e.try_clone()?, e)))
|
||||
let pause_evt = self
|
||||
.common
|
||||
.pause_evt
|
||||
.as_ref()
|
||||
.unwrap()
|
||||
.try_clone()
|
||||
.map_err(|e| {
|
||||
error!("failed creating pause EventFd pair: {}", e);
|
||||
error!("failed to clone pause_evt eventfd: {}", e);
|
||||
ActivateError::BadActivate
|
||||
})?;
|
||||
self.pause_evt = Some(self_pause_evt);
|
||||
|
||||
// Save the interrupt EventFD as we need to return it on reset
|
||||
// but clone it to pass into the thread.
|
||||
self.interrupt_cb = Some(interrupt_cb.clone());
|
||||
|
||||
let mut tmp_queue_evts: Vec<EventFd> = Vec::new();
|
||||
for queue_evt in queue_evts.iter() {
|
||||
// Save the queue EventFD as we need to return it on reset
|
||||
// but clone it to pass into the thread.
|
||||
tmp_queue_evts.push(queue_evt.try_clone().map_err(|e| {
|
||||
error!("failed to clone queue EventFd: {}", e);
|
||||
ActivateError::BadActivate
|
||||
})?);
|
||||
}
|
||||
self.queue_evts = Some(tmp_queue_evts);
|
||||
|
||||
let mut handler = IommuEpollHandler {
|
||||
queues,
|
||||
mem,
|
||||
@ -956,8 +925,8 @@ impl VirtioDevice for Iommu {
|
||||
ext_domain_mapping: BTreeMap::new(),
|
||||
};
|
||||
|
||||
let paused = self.paused.clone();
|
||||
let paused_sync = self.paused_sync.clone();
|
||||
let paused = self.common.paused.clone();
|
||||
let paused_sync = self.common.paused_sync.clone();
|
||||
let mut epoll_threads = Vec::new();
|
||||
// Retrieve seccomp filter for virtio_iommu thread
|
||||
let virtio_iommu_seccomp_filter =
|
||||
@ -968,7 +937,7 @@ impl VirtioDevice for Iommu {
|
||||
.spawn(move || {
|
||||
if let Err(e) = SeccompFilter::apply(virtio_iommu_seccomp_filter) {
|
||||
error!("Error applying seccomp filter: {:?}", e);
|
||||
} else if let Err(e) = handler.run(paused, paused_sync) {
|
||||
} else if let Err(e) = handler.run(paused, paused_sync.unwrap()) {
|
||||
error!("Error running worker: {:?}", e);
|
||||
}
|
||||
})
|
||||
@ -978,31 +947,26 @@ impl VirtioDevice for Iommu {
|
||||
ActivateError::BadActivate
|
||||
})?;
|
||||
|
||||
self.epoll_threads = Some(epoll_threads);
|
||||
self.common.epoll_threads = Some(epoll_threads);
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn reset(&mut self) -> Option<(Arc<dyn VirtioInterrupt>, Vec<EventFd>)> {
|
||||
// We first must resume the virtio thread if it was paused.
|
||||
if self.pause_evt.take().is_some() {
|
||||
self.resume().ok()?;
|
||||
}
|
||||
|
||||
if let Some(kill_evt) = self.kill_evt.take() {
|
||||
// Ignore the result because there is nothing we can do about it.
|
||||
let _ = kill_evt.write(1);
|
||||
}
|
||||
|
||||
// Return the interrupt and queue EventFDs
|
||||
Some((
|
||||
self.interrupt_cb.take().unwrap(),
|
||||
self.queue_evts.take().unwrap(),
|
||||
))
|
||||
self.common.reset()
|
||||
}
|
||||
}
|
||||
|
||||
impl Pausable for Iommu {
|
||||
fn pause(&mut self) -> result::Result<(), MigratableError> {
|
||||
self.common.pause()
|
||||
}
|
||||
|
||||
fn resume(&mut self) -> result::Result<(), MigratableError> {
|
||||
self.common.resume()
|
||||
}
|
||||
}
|
||||
|
||||
virtio_pausable!(Iommu);
|
||||
impl Snapshottable for Iommu {
|
||||
fn id(&self) -> String {
|
||||
self.id.clone()
|
||||
|
||||
Loading…
Reference in New Issue
Block a user