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pc-bios/s390-ccw/virtio: Add a function to reset a virtio device

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To be able to properly silence a virtio device after using it,
we need a global function to reset the device.

Reviewed-by: Jared Rossi <jrossi@linux.ibm.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Tested-by: Jared Rossi <jrossi@linux.ibm.com>
Message-ID: <20250116115826.192047-2-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Thomas Huth 2025-01-16 12:58:24 +01:00
parent 807830e809
commit 3936d05563
2 changed files with 7 additions and 1 deletions
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7
pc-bios/s390-ccw/virtio.c
View File

@ -217,6 +217,11 @@ int virtio_run(VDev *vdev, int vqid, VirtioCmd *cmd)
return 0;
}
int virtio_reset(VDev *vdev)
{
return run_ccw(vdev, CCW_CMD_VDEV_RESET, NULL, 0, false);
}
int virtio_setup_ccw(VDev *vdev)
{
int i, cfg_size = 0;
@ -235,7 +240,7 @@ int virtio_setup_ccw(VDev *vdev)
vdev->config.blk.blk_size = 0; /* mark "illegal" - setup started... */
vdev->guessed_disk_nature = VIRTIO_GDN_NONE;
run_ccw(vdev, CCW_CMD_VDEV_RESET, NULL, 0, false);
virtio_reset(vdev);
status = VIRTIO_CONFIG_S_ACKNOWLEDGE;
if (run_ccw(vdev, CCW_CMD_WRITE_STATUS, &status, sizeof(status), false)) {

1
pc-bios/s390-ccw/virtio.h
View File

@ -274,6 +274,7 @@ void vring_send_buf(VRing *vr, void *p, int len, int flags);
int vr_poll(VRing *vr);
int vring_wait_reply(void);
int virtio_run(VDev *vdev, int vqid, VirtioCmd *cmd);
int virtio_reset(VDev *vdev);
int virtio_setup_ccw(VDev *vdev);
int virtio_net_init(void *mac_addr);