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| author | Stephan Gerhold <stephan.gerhold@kernkonzept.com> | 2022-06-21 13:06:21 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-21 21:24:33 +0200 |
| commit | bf53079245634c3eccdab47befb8ffff77c6141a (patch) | |
| tree | 47e394acbe95eaba85892a41a9a45eafe3cdf8b2 /net/tipc | |
| parent | 26d824d1316fa57b54711b1f1787aded425cfa52 (diff) | |
virtio_mmio: Restore guest page size on resume
[ Upstream commit e0c2ce8217955537dd5434baeba061f209797119 ]
Virtio devices might lose their state when the VMM is restarted
after a suspend to disk (hibernation) cycle. This means that the
guest page size register must be restored for the virtio_mmio legacy
interface, since otherwise the virtio queues are not functional.
This is particularly problematic for QEMU that currently still defaults
to using the legacy interface for virtio_mmio. Write the guest page
size register again in virtio_mmio_restore() to make legacy virtio_mmio
devices work correctly after hibernation.
Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Message-Id: <20220621110621.3638025-3-stephan.gerhold@kernkonzept.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/tipc')
0 files changed, 0 insertions, 0 deletions