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devices: virtio: add PCI configuration callback function

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The idea is that virtio devices can specify additional memory
regions.

BUG=chromium:924405
TEST=run VM

Change-Id: I2a9f233ca8e2bc4fd9b05ee83101b11deb6e7b04
Reviewed-on: https://chromium-review.googlesource.com/1480742
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
This commit is contained in:
Gurchetan Singh 2019-01-28 15:32:34 -08:00 committed by chrome-bot
parent 036ba3390b
commit ebc156186b
1 changed files with 6 additions and 0 deletions
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6
devices/src/virtio/virtio_device.rs
View file

@ -7,6 +7,7 @@ use std::sync::atomic::AtomicUsize;
use std::sync::Arc;
use super::*;
use pci::PciBarConfiguration;
use sys_util::{EventFd, GuestMemory};
/// Trait for virtio devices to be driven by a virtio transport.
@ -73,4 +74,9 @@ pub trait VirtioDevice: Send {
fn reset(&mut self) -> Option<(EventFd, Vec<EventFd>)> {
None
}
/// Optionally returns additional BAR configuration needed by device
fn get_device_bars(&self) -> Option<Vec<PciBarConfiguration>> {
None
}
}