diff options
| author | Tony Krowiak <akrowiak@linux.ibm.com> | 2018-09-25 19:16:24 -0400 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2018-09-26 21:02:59 +0200 |
| commit | 81b2b4b76a733ee479af359db59e1c91e3aad4cd (patch) | |
| tree | befbae4af15e3ba3d64c03a1679d7d4d0d4c2e67 | |
| parent | 3b1eab7fb9da69c9af129058ed5aebb93d40d623 (diff) | |
s390: vfio-ap: sysfs interface to view matrix mdev matrix
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
Below are examples of the output from the above command:
Example 1: Adapters and domains assigned
Assignments:
Adapters 5 and 6
Domains 4 and 71 (0x47)
Output
05.0004
05.0047
06.0004
06.0047
Examples 2: Only adapters assigned
Assignments:
Adapters 5 and 6
Output:
05.
06.
Examples 3: Only domains assigned
Assignments:
Domains 4 and 71 (0x47)
Output:
.0004
.0047
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Tested-by: Michael Mueller <mimu@linux.ibm.com>
Tested-by: Farhan Ali <alifm@linux.ibm.com>
Tested-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20180925231641.4954-10-akrowiak@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| -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, }; |