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devices: balloon: define features as shift counts

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This matches the definitions from the virtio specification and makes
balloon consistent with the other virtio devices in crosvm.

BUG=None
TEST=build_test.py

Change-Id: I9dd6b6ec981944e28eaf6bc92332db5ec326433b
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1313011
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
This commit is contained in:
Daniel Verkamp 2018-10-24 10:20:24 -07:00 committed by chrome-bot
parent 994e418039
commit 60f55da937
1 changed files with 4 additions and 4 deletions
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8
devices/src/virtio/balloon.rs
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@ -37,8 +37,8 @@ const QUEUE_SIZES: &'static [u16] = &[QUEUE_SIZE, QUEUE_SIZE];
const VIRTIO_BALLOON_PFN_SHIFT: u32 = 12; const VIRTIO_BALLOON_PFN_SHIFT: u32 = 12;
// The feature bitmap for virtio balloon // The feature bitmap for virtio balloon
const VIRTIO_BALLOON_F_MUST_TELL_HOST: u32 = 0x01; // Tell before reclaiming pages const VIRTIO_BALLOON_F_MUST_TELL_HOST: u32 = 0; // Tell before reclaiming pages
const VIRTIO_BALLOON_F_DEFLATE_ON_OOM: u32 = 0x04; // Deflate balloon on OOM const VIRTIO_BALLOON_F_DEFLATE_ON_OOM: u32 = 2; // Deflate balloon on OOM
// BalloonConfig is modified by the worker and read from the device thread. // BalloonConfig is modified by the worker and read from the device thread.
#[derive(Default)] #[derive(Default)]
@ -235,7 +235,7 @@ impl Balloon {
}), }),
kill_evt: None, kill_evt: None,
// TODO(dgreid) - Add stats queue feature. // TODO(dgreid) - Add stats queue feature.
features: VIRTIO_BALLOON_F_MUST_TELL_HOST | VIRTIO_BALLOON_F_DEFLATE_ON_OOM, features: 1 << VIRTIO_BALLOON_F_MUST_TELL_HOST | 1 << VIRTIO_BALLOON_F_DEFLATE_ON_OOM,
}) })
} }
} }
@ -297,7 +297,7 @@ impl VirtioDevice for Balloon {
fn features(&self, page: u32) -> u32 { fn features(&self, page: u32) -> u32 {
match page { match page {
0 => VIRTIO_BALLOON_F_MUST_TELL_HOST | VIRTIO_BALLOON_F_DEFLATE_ON_OOM, 0 => 1 << VIRTIO_BALLOON_F_MUST_TELL_HOST | 1 << VIRTIO_BALLOON_F_DEFLATE_ON_OOM,
_ => 0u32, _ => 0u32,
} }
} }