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virtio-devices: Add default implementations for {read,write}_config

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Not every virtio device has any config fields that can be read and most
have none that can be written to.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2020-07-16 09:46:05 +01:00 committed by Sebastien Boeuf
parent f1419d116d
commit 6ba1c4318e
1 changed files with 13 additions and 2 deletions
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15
virtio-devices/src/device.rs
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@ -11,6 +11,7 @@ use std::collections::HashMap;
use std::num::Wrapping;
use std::sync::Arc;
use vm_memory::{GuestAddress, GuestMemoryAtomic, GuestMemoryMmap, GuestUsize};
use vm_virtio::VirtioDeviceType;
use vmm_sys_util::eventfd::EventFd;
pub enum VirtioInterruptType {
@ -82,10 +83,20 @@ pub trait VirtioDevice: Send {
}
/// Reads this device configuration space at `offset`.
fn read_config(&self, offset: u64, data: &mut [u8]);
fn read_config(&self, _offset: u64, _data: &mut [u8]) {
warn!(
"No readable configuration fields for {}",
VirtioDeviceType::from(self.device_type())
);
}
/// Writes to this device configuration space at `offset`.
fn write_config(&mut self, offset: u64, data: &[u8]);
fn write_config(&mut self, _offset: u64, _data: &[u8]) {
warn!(
"No writable configuration fields for {}",
VirtioDeviceType::from(self.device_type())
);
}
/// Activates this device for real usage.
fn activate(