mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
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>
This commit is contained in:
parent
3b1eab7fb9
commit
81b2b4b76a
1 changed files with 51 additions and 0 deletions
|
@ -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,
|
||||
};
|
||||
|
||||
|
|
Loading…
Reference in a new issue