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ANDROID: virtio_balloon: Do not clear VIRTIO_F_ACCESS_PLATFORM

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This essentially reverts commit e41b135550
"virtio_balloon: disable VIOMMU support".

Although the virtio_balloon driver does not translate through a
VIOMMU (or bounce buffer) the pages that it sends to the device,
it *does* need to perform these translations on the virtio rings
themselves.

This fixes virtio_balloon initialisation inside a PKVM/ARM64
protected virtual machine.

Bug: 240239989
Change-Id: I2a84eec870fd638223b231e5c4d1c27216dc40a2
Signed-off-by: Keir Fraser <keirf@google.com>
Signed-off-by: Quentin Perret <qperret@google.com>
This commit is contained in:
Keir Fraser
2022-11-17 14:59:38 +00:00
committed by Quentin Perret
parent a12648bd1e
commit 6fe4c366af
1 changed files with 0 additions and 1 deletions
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1
drivers/virtio/virtio_balloon.c
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@@ -1108,7 +1108,6 @@ static int virtballoon_validate(struct virtio_device *vdev)
else if (!virtio_has_feature(vdev, VIRTIO_BALLOON_F_PAGE_POISON))
__virtio_clear_bit(vdev, VIRTIO_BALLOON_F_REPORTING);
__virtio_clear_bit(vdev, VIRTIO_F_ACCESS_PLATFORM);
return 0;
}