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zdev: Add support for virtio devices

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Add support for managing virtual I/O ccw (virtio-ccw) devices in
lszdev/chzdev.

New zdev device type virtio. Each virtio device type (blk, net,
gpu, vsock, etc.) is represented by a unique subtype of the virtio
base type.

If the virtio device type is recognized, then it will show up as
virtio-blk or virtio-net, or whatever the virtio device type is.
Otherwise, it will just show up as virtio-ccw.

Fixes: https://github.com/ibm-s390-linux/s390-tools/issues/29
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Peter Jin <pjin@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Peter Jin
2025-05-28 13:03:40 -04:00
committed by Jan Höppner
parent 2d86117167
commit 2349236bb4
7 changed files with 317 additions and 3 deletions
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1
zdev/include/devnode.h
View File

@@ -42,5 +42,6 @@ int devnode_cmp(struct devnode *, struct devnode *);
int devnode_add_block_from_sysfs(struct util_list *, const char *);
int devnode_add_net_from_sysfs(struct util_list *, const char *);
char *devnode_readlink(struct devnode *);
char *devnode_get_virtio_dir(const char *ccw_path);
#endif /* DEVNODE_H */

19
zdev/include/virtio.h Normal file
View File

@@ -0,0 +1,19 @@
/*
* zdev - Modify and display the persistent configuration of devices
*
* Copyright IBM Corp. 2025
*
* s390-tools is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#ifndef VIRTIO_H
#define VIRTIO_H
struct devtype;
struct subtype;
extern struct devtype virtio_devtype;
/* Subtypes are defined in virtio_devtype.subtypes array */
#endif /* VIRTIO_H */