diff options
Diffstat (limited to 'drivers/s390/crypto/vfio_ap_ops.c')
| -rw-r--r-- | drivers/s390/crypto/vfio_ap_ops.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index a6c08cd2ed0f..3834624dcc2e 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -625,6 +625,56 @@ static ssize_t control_domains_show(struct device *dev, } DEVICE_ATTR_RO(control_domains); +static ssize_t matrix_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct mdev_device *mdev = mdev_from_dev(dev); + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + char *bufpos = buf; + unsigned long apid; + unsigned long apqi; + unsigned long apid1; + unsigned long apqi1; + unsigned long napm_bits = matrix_mdev->matrix.apm_max + 1; + unsigned long naqm_bits = matrix_mdev->matrix.aqm_max + 1; + int nchars = 0; + int n; + + apid1 = find_first_bit_inv(matrix_mdev->matrix.apm, napm_bits); + apqi1 = find_first_bit_inv(matrix_mdev->matrix.aqm, naqm_bits); + + mutex_lock(&matrix_dev->lock); + + if ((apid1 < napm_bits) && (apqi1 < naqm_bits)) { + for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, napm_bits) { + for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, + naqm_bits) { + n = sprintf(bufpos, "%02lx.%04lx\n", apid, + apqi); + bufpos += n; + nchars += n; + } + } + } else if (apid1 < napm_bits) { + for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, napm_bits) { + n = sprintf(bufpos, "%02lx.\n", apid); + bufpos += n; + nchars += n; + } + } else if (apqi1 < naqm_bits) { + for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, naqm_bits) { + n = sprintf(bufpos, ".%04lx\n", apqi); + bufpos += n; + nchars += n; + } + } + + mutex_unlock(&matrix_dev->lock); + + return nchars; +} +DEVICE_ATTR_RO(matrix); + static struct attribute *vfio_ap_mdev_attrs[] = { &dev_attr_assign_adapter.attr, &dev_attr_unassign_adapter.attr, @@ -633,6 +683,7 @@ static struct attribute *vfio_ap_mdev_attrs[] = { &dev_attr_assign_control_domain.attr, &dev_attr_unassign_control_domain.attr, &dev_attr_control_domains.attr, + &dev_attr_matrix.attr, NULL, }; |