From: Alexander Duyck <alexander.h.duyck@xxxxxxxxxxxxxxx>
If we have free page hinting or page reporting enabled we should disable it
if the pages are poisoned or initialized on free and we cannot notify the
hypervisor.
Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host")
Signed-off-by: Alexander Duyck <alexander.h.duyck@xxxxxxxxxxxxxxx>
---
drivers/virtio/virtio_balloon.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 95d9c2f0a7be..08bc86a6e468 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -1110,8 +1110,12 @@ static int virtballoon_validate(struct virtio_device *vdev)
/* Tell the host whether we care about poisoned pages. */
if (!want_init_on_free() &&
(IS_ENABLED(CONFIG_PAGE_POISONING_NO_SANITY) ||
- !page_poisoning_enabled()))
+ !page_poisoning_enabled())) {
__virtio_clear_bit(vdev, VIRTIO_BALLOON_F_PAGE_POISON);
+ } else if (!virtio_has_feature(vdev, VIRTIO_BALLOON_F_PAGE_POISON)) {
+ __virtio_clear_bit(vdev, VIRTIO_BALLOON_F_FREE_PAGE_HINT);
+ __virtio_clear_bit(vdev, VIRTIO_BALLOON_F_REPORTING);
+ }
__virtio_clear_bit(vdev, VIRTIO_F_IOMMU_PLATFORM);
return 0;
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