Messages in this thread Patch in this message | | | From | Tony Krowiak <> | Subject | [PATCH v11 09/26] s390: vfio-ap: sysfs interface to view matrix mdev matrix | Date | Tue, 25 Sep 2018 19:16:24 -0400 |
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From: Tony Krowiak <akrowiak@linux.ibm.com>
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> --- drivers/s390/crypto/vfio_ap_ops.c | 51 +++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+)
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index cd5a2aa7a51a..61a5fa7ad40d 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -624,6 +624,56 @@ 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, @@ -632,6 +682,7 @@ 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, }; -- 2.19.0.221.g150f307
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