diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2021-03-05 15:19:59 +0300 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2021-06-17 22:45:44 +0300 |
| commit | 43c590cb86665be702c0af0231a10ec813df9cfd (patch) | |
| tree | dc1c8389fce0e298bf113e880eb457e0bd69de5e /arch/um/include | |
| parent | 68f5d3f3b6543266b29e047cfaf9842333019b4c (diff) | |
| download | linux-43c590cb86665be702c0af0231a10ec813df9cfd.tar.xz | |
um: virtio/pci: enable suspend/resume
The UM virtual PCI devices currently cannot be suspended properly
since the virtio driver already disables VQs well before the PCI
bus's suspend_noirq wants to complete the transition by writing to
PCI config space.
After trying around for a long time with moving the devices on the
DPM list, trying to create dependencies between them, etc. I gave
up and instead added UML specific cross-driver API that lets the
virt-pci code enable not suspending/resuming VQs for its devices.
This then allows the PCI bus suspend_noirq to still talk to the
device, and suspend/resume works properly.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/include')
| -rw-r--r-- | arch/um/include/linux/virtio-uml.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/um/include/linux/virtio-uml.h b/arch/um/include/linux/virtio-uml.h new file mode 100644 index 000000000000..2f652fa90f04 --- /dev/null +++ b/arch/um/include/linux/virtio-uml.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2021 Intel Corporation + * Author: Johannes Berg <johannes@sipsolutions.net> + */ + +#ifndef __VIRTIO_UML_H__ +#define __VIRTIO_UML_H__ + +void virtio_uml_set_no_vq_suspend(struct virtio_device *vdev, + bool no_vq_suspend); + +#endif /* __VIRTIO_UML_H__ */ |