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virtio-devices: mem: Port to VirtioCommon for feature handling

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Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2020-09-03 10:37:36 +01:00 committed by Sebastien Boeuf
parent 47c165e08a
commit d63dcae233
1 changed files with 9 additions and 17 deletions
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26
virtio-devices/src/mem.rs
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@ -15,8 +15,8 @@
use super::Error as DeviceError;
use super::{
ActivateError, ActivateResult, DescriptorChain, EpollHelper, EpollHelperError,
EpollHelperHandler, Queue, VirtioDevice, VirtioDeviceType, EPOLL_HELPER_EVENT_LAST,
VIRTIO_F_VERSION_1,
EpollHelperHandler, Queue, VirtioCommon, VirtioDevice, VirtioDeviceType,
EPOLL_HELPER_EVENT_LAST, VIRTIO_F_VERSION_1,
};
use crate::seccomp_filters::{get_seccomp_filter, Thread};
@ -680,12 +680,11 @@ impl EpollHelperHandler for MemEpollHandler {
// Virtio device for exposing entropy to the guest OS through virtio.
pub struct Mem {
common: VirtioCommon,
id: String,
resize: Resize,
kill_evt: Option<EventFd>,
pause_evt: Option<EventFd>,
avail_features: u64,
pub acked_features: u64,
host_addr: u64,
host_fd: Option<RawFd>,
config: Arc<Mutex<VirtioMemConfig>>,
@ -737,12 +736,14 @@ impl Mem {
};
Ok(Mem {
common: VirtioCommon {
avail_features,
acked_features: 0u64,
},
id,
resize,
kill_evt: None,
pause_evt: None,
avail_features,
acked_features: 0u64,
host_addr: region.as_ptr() as u64,
host_fd,
config: Arc::new(Mutex::new(config)),
@ -775,20 +776,11 @@ impl VirtioDevice for Mem {
}
fn features(&self) -> u64 {
self.avail_features
self.common.avail_features
}
fn ack_features(&mut self, value: u64) {
let mut v = value;
// Check if the guest is ACK'ing a feature that we didn't claim to have.
let unrequested_features = v & !self.avail_features;
if unrequested_features != 0 {
warn!("Received acknowledge request for unknown feature.");
// Don't count these features as acked.
v &= !unrequested_features;
}
self.acked_features |= v;
self.common.ack_features(value)
}
fn read_config(&self, offset: u64, data: &mut [u8]) {