diff options
| author | Tony Krowiak <akrowiak@linux.ibm.com> | 2023-05-30 18:35:38 -0400 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2023-06-06 13:42:07 +0200 |
| commit | 2e3d8d71e285fcf39eb30dbb17a58baa90649867 (patch) | |
| tree | 9544c5ffae6238a511a93139b7f754a5e8db0152 /drivers/s390/crypto | |
| parent | bf48961f6f48e3b7eb80c3e179207e9f4e4cd660 (diff) | |
s390/vfio-ap: wire in the vfio_device_ops request callback
The mdev device is being removed, so pass the request to userspace to
ask for a graceful cleanup. This should free up the thread that
would otherwise loop waiting for the device to be fully released.
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Link: https://lore.kernel.org/r/20230530223538.279198-4-akrowiak@linux.ibm.com
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'drivers/s390/crypto')
| -rw-r--r-- | drivers/s390/crypto/vfio_ap_ops.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 44f159136891..a8f58e133e6e 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -1736,6 +1736,26 @@ static void vfio_ap_mdev_close_device(struct vfio_device *vdev) vfio_ap_mdev_unset_kvm(matrix_mdev); } +static void vfio_ap_mdev_request(struct vfio_device *vdev, unsigned int count) +{ + struct device *dev = vdev->dev; + struct ap_matrix_mdev *matrix_mdev; + + matrix_mdev = container_of(vdev, struct ap_matrix_mdev, vdev); + + if (matrix_mdev->req_trigger) { + if (!(count % 10)) + dev_notice_ratelimited(dev, + "Relaying device request to user (#%u)\n", + count); + + eventfd_signal(matrix_mdev->req_trigger, 1); + } else if (count == 0) { + dev_notice(dev, + "No device request registered, blocked until released by user\n"); + } +} + static int vfio_ap_mdev_get_device_info(unsigned long arg) { unsigned long minsz; @@ -1955,6 +1975,7 @@ static const struct vfio_device_ops vfio_ap_matrix_dev_ops = { .bind_iommufd = vfio_iommufd_emulated_bind, .unbind_iommufd = vfio_iommufd_emulated_unbind, .attach_ioas = vfio_iommufd_emulated_attach_ioas, + .request = vfio_ap_mdev_request }; static struct mdev_driver vfio_ap_matrix_driver = { |