From: Tony Krowiak <akrowiak@xxxxxxxxxxxxx> Provides a sysfs interface to view the AP matrix configured for the mediated matrix device. The relevant sysfs structures are: /sys/devices/vfio_ap ... [matrix] ...... [mdev_supported_types] ......... [vfio_ap-passthrough] ............ [devices] ...............[$uuid] .................. matrix To view the matrix configured for the mediated matrix device, print the matrix file: cat matrix Signed-off-by: Tony Krowiak <akrowiak@xxxxxxxxxxxxx> Reviewed-by: Halil Pasic <pasic@xxxxxxxxxxxxx> Tested-by: Michael Mueller <mimu@xxxxxxxxxxxxx> Tested-by: Farhan Ali <alifm@xxxxxxxxxxxxx> Tested-by: Pierre Morel <pmorel@xxxxxxxxxxxxx> Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx> --- drivers/s390/crypto/vfio_ap_ops.c | 33 +++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index fafe6ec7fec7..9258902d9f70 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -403,6 +403,38 @@ 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 napm = matrix_mdev->matrix.apm_max + 1; + unsigned long naqm = matrix_mdev->matrix.aqm_max + 1; + int nchars = 0; + int n; + + mutex_lock(&matrix_dev.lock); + for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, napm) { + n = sprintf(bufpos, "%02lx\n", apid); + bufpos += n; + nchars += n; + + for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, naqm) { + n = sprintf(bufpos, "%02lx.%04lx\n", apid, 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, @@ -411,6 +443,7 @@ 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, }; -- 2.17.0 -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html