diff options
Diffstat (limited to 'drivers/s390/crypto')
-rw-r--r-- | drivers/s390/crypto/vfio_ap_drv.c | 79 | ||||
-rw-r--r-- | drivers/s390/crypto/zcrypt_api.c | 7 |
2 files changed, 79 insertions, 7 deletions
diff --git a/drivers/s390/crypto/vfio_ap_drv.c b/drivers/s390/crypto/vfio_ap_drv.c index 03311a476366..e043ae236630 100644 --- a/drivers/s390/crypto/vfio_ap_drv.c +++ b/drivers/s390/crypto/vfio_ap_drv.c @@ -17,6 +17,9 @@ #define VFIO_AP_ROOT_NAME "vfio_ap" #define VFIO_AP_DEV_NAME "matrix" +#define AP_QUEUE_ASSIGNED "assigned" +#define AP_QUEUE_UNASSIGNED "unassigned" +#define AP_QUEUE_IN_USE "in use" MODULE_AUTHOR("IBM Corporation"); MODULE_DESCRIPTION("VFIO AP device driver, Copyright IBM Corp. 2018"); @@ -41,26 +44,95 @@ static struct ap_device_id ap_queue_ids[] = { MODULE_DEVICE_TABLE(vfio_ap, ap_queue_ids); +static struct ap_matrix_mdev *vfio_ap_mdev_for_queue(struct vfio_ap_queue *q) +{ + struct ap_matrix_mdev *matrix_mdev; + unsigned long apid = AP_QID_CARD(q->apqn); + unsigned long apqi = AP_QID_QUEUE(q->apqn); + + list_for_each_entry(matrix_mdev, &matrix_dev->mdev_list, node) { + if (test_bit_inv(apid, matrix_mdev->matrix.apm) && + test_bit_inv(apqi, matrix_mdev->matrix.aqm)) + return matrix_mdev; + } + + return NULL; +} + +static ssize_t status_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + ssize_t nchars = 0; + struct vfio_ap_queue *q; + struct ap_matrix_mdev *matrix_mdev; + struct ap_device *apdev = to_ap_dev(dev); + + mutex_lock(&matrix_dev->lock); + q = dev_get_drvdata(&apdev->device); + matrix_mdev = vfio_ap_mdev_for_queue(q); + + if (matrix_mdev) { + if (matrix_mdev->kvm) + nchars = scnprintf(buf, PAGE_SIZE, "%s\n", + AP_QUEUE_IN_USE); + else + nchars = scnprintf(buf, PAGE_SIZE, "%s\n", + AP_QUEUE_ASSIGNED); + } else { + nchars = scnprintf(buf, PAGE_SIZE, "%s\n", + AP_QUEUE_UNASSIGNED); + } + + mutex_unlock(&matrix_dev->lock); + + return nchars; +} + +static DEVICE_ATTR_RO(status); + +static struct attribute *vfio_queue_attrs[] = { + &dev_attr_status.attr, + NULL, +}; + +static const struct attribute_group vfio_queue_attr_group = { + .attrs = vfio_queue_attrs, +}; + /** * vfio_ap_queue_dev_probe: Allocate a vfio_ap_queue structure and associate it * with the device as driver_data. * * @apdev: the AP device being probed * - * Return: returns 0 if the probe succeeded; otherwise, returns -ENOMEM if - * storage could not be allocated for a vfio_ap_queue object. + * Return: returns 0 if the probe succeeded; otherwise, returns an error if + * storage could not be allocated for a vfio_ap_queue object or the + * sysfs 'status' attribute could not be created for the queue device. */ static int vfio_ap_queue_dev_probe(struct ap_device *apdev) { + int ret; struct vfio_ap_queue *q; q = kzalloc(sizeof(*q), GFP_KERNEL); if (!q) return -ENOMEM; + + mutex_lock(&matrix_dev->lock); dev_set_drvdata(&apdev->device, q); q->apqn = to_ap_queue(&apdev->device)->qid; q->saved_isc = VFIO_AP_ISC_INVALID; - return 0; + + ret = sysfs_create_group(&apdev->device.kobj, &vfio_queue_attr_group); + if (ret) { + dev_set_drvdata(&apdev->device, NULL); + kfree(q); + } + + mutex_unlock(&matrix_dev->lock); + + return ret; } /** @@ -75,6 +147,7 @@ static void vfio_ap_queue_dev_remove(struct ap_device *apdev) struct vfio_ap_queue *q; mutex_lock(&matrix_dev->lock); + sysfs_remove_group(&apdev->device.kobj, &vfio_queue_attr_group); q = dev_get_drvdata(&apdev->device); vfio_ap_mdev_reset_queue(q, 1); dev_set_drvdata(&apdev->device, NULL); diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c index 4c3dcc435e83..9811ab81f3c4 100644 --- a/drivers/s390/crypto/zcrypt_api.c +++ b/drivers/s390/crypto/zcrypt_api.c @@ -878,14 +878,13 @@ static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms, /* * If a valid target domain is set and this domain is NOT a usage - * domain but a control only domain, use the default domain as target. + * domain but a control only domain, autoselect target domain. */ tdom = *domain; if (tdom < AP_DOMAINS && !ap_test_config_usage_domain(tdom) && - ap_test_config_ctrl_domain(tdom) && - ap_domain_index >= 0) - tdom = ap_domain_index; + ap_test_config_ctrl_domain(tdom)) + tdom = AUTOSEL_DOM; pref_zc = NULL; pref_zq = NULL; |