From: Tony Krowiak <akrowiak@linux.ibm.com>
To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org
Cc: freude@linux.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.com,
mjrosato@linux.ibm.com, pmorel@linux.ibm.com,
pasic@linux.ibm.com, alex.williamson@redhat.com,
kwankhede@nvidia.com, jjherne@linux.ibm.com,
fiuczy@linux.ibm.com, Tony Krowiak <akrowiak@linux.ibm.com>
Subject: [PATCH v7 06/15] s390/vfio-ap: sysfs attribute to display the guest CRYCB
Date: Tue, 7 Apr 2020 15:20:06 -0400 [thread overview]
Message-ID: <20200407192015.19887-7-akrowiak@linux.ibm.com> (raw)
In-Reply-To: <20200407192015.19887-1-akrowiak@linux.ibm.com>
The matrix of adapters and domains configured in a guest's CRYCB may
differ from the matrix of adapters and domains assigned to the matrix mdev,
so this patch introduces a sysfs attribute to display the CRYCB of a guest
using the matrix mdev. For a matrix mdev denoted by $uuid, the crycb for a
guest using the matrix mdev can be displayed as follows:
cat /sys/devices/vfio_ap/matrix/$uuid/guest_matrix
If a guest is not using the matrix mdev at the time the crycb is displayed,
an error (ENODEV) will be returned.
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
---
drivers/s390/crypto/vfio_ap_ops.c | 58 +++++++++++++++++++++++++++++++
1 file changed, 58 insertions(+)
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index b8b678032ab7..beb2e68a2b1c 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -1041,6 +1041,63 @@ static ssize_t matrix_show(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR_RO(matrix);
+static ssize_t guest_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->shadow_crycb.apm_max + 1;
+ unsigned long naqm_bits = matrix_mdev->shadow_crycb.aqm_max + 1;
+ int nchars = 0;
+ int n;
+
+ if (!vfio_ap_mdev_has_crycb(matrix_mdev))
+ return -ENODEV;
+
+ apid1 = find_first_bit_inv(matrix_mdev->shadow_crycb.apm, napm_bits);
+ apqi1 = find_first_bit_inv(matrix_mdev->shadow_crycb.aqm, naqm_bits);
+
+ mutex_lock(&matrix_dev->lock);
+
+ if ((apid1 < napm_bits) && (apqi1 < naqm_bits)) {
+ for_each_set_bit_inv(apid, matrix_mdev->shadow_crycb.apm,
+ napm_bits) {
+ for_each_set_bit_inv(apqi,
+ matrix_mdev->shadow_crycb.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->shadow_crycb.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->shadow_crycb.aqm,
+ naqm_bits) {
+ n = sprintf(bufpos, ".%04lx\n", apqi);
+ bufpos += n;
+ nchars += n;
+ }
+ }
+
+ mutex_unlock(&matrix_dev->lock);
+
+ return nchars;
+}
+static DEVICE_ATTR_RO(guest_matrix);
+
static struct attribute *vfio_ap_mdev_attrs[] = {
&dev_attr_assign_adapter.attr,
&dev_attr_unassign_adapter.attr,
@@ -1050,6 +1107,7 @@ static struct attribute *vfio_ap_mdev_attrs[] = {
&dev_attr_unassign_control_domain.attr,
&dev_attr_control_domains.attr,
&dev_attr_matrix.attr,
+ &dev_attr_guest_matrix.attr,
NULL,
};
--
2.21.1
next prev parent reply other threads:[~2020-04-07 19:21 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-07 19:20 [PATCH v7 00/15] s390/vfio-ap: dynamic configuration support Tony Krowiak
2020-04-07 19:20 ` [PATCH v7 01/15] s390/vfio-ap: store queue struct in hash table for quick access Tony Krowiak
2020-04-08 10:48 ` Cornelia Huck
2020-04-08 15:38 ` Tony Krowiak
2020-04-08 16:27 ` Cornelia Huck
2020-04-08 16:34 ` Tony Krowiak
2020-04-24 3:57 ` Halil Pasic
2020-04-27 13:05 ` Harald Freudenberger
2020-04-27 15:17 ` Halil Pasic
2020-04-27 21:48 ` Tony Krowiak
2020-04-28 10:07 ` Halil Pasic
2020-04-28 10:57 ` Harald Freudenberger
2020-04-28 22:30 ` Tony Krowiak
2020-04-29 7:56 ` Harald Freudenberger
2020-04-29 11:30 ` Halil Pasic
2020-04-28 10:46 ` Harald Freudenberger
2020-04-07 19:20 ` [PATCH v7 02/15] s390/vfio-ap: manage link between queue struct and matrix mdev Tony Krowiak
2020-04-09 15:06 ` Cornelia Huck
2020-04-10 15:32 ` Tony Krowiak
2020-04-10 15:41 ` Tony Krowiak
2020-04-07 19:20 ` [PATCH v7 03/15] s390/zcrypt: driver callback to indicate resource in use Tony Krowiak
2020-04-14 12:08 ` Cornelia Huck
2020-04-15 17:10 ` Tony Krowiak
2020-04-16 10:05 ` Cornelia Huck
2020-04-16 14:35 ` Tony Krowiak
2020-04-14 12:58 ` Cornelia Huck
2020-04-15 6:08 ` Harald Freudenberger
2020-04-16 9:33 ` Cornelia Huck
2020-04-17 13:54 ` Harald Freudenberger
2020-04-15 17:10 ` Tony Krowiak
2020-04-16 9:37 ` Cornelia Huck
2020-04-24 3:33 ` Halil Pasic
2020-04-24 17:07 ` Tony Krowiak
2020-04-24 18:23 ` Halil Pasic
2020-04-27 21:36 ` Tony Krowiak
2020-04-27 8:20 ` Pierre Morel
2020-04-27 22:24 ` Tony Krowiak
2020-04-28 8:09 ` Pierre Morel
2020-04-28 11:07 ` Harald Freudenberger
2020-04-28 14:37 ` Tony Krowiak
2020-04-07 19:20 ` [PATCH v7 04/15] s390/vfio-ap: implement in-use callback for vfio_ap driver Tony Krowiak
2020-04-16 11:18 ` Cornelia Huck
2020-04-16 14:45 ` Tony Krowiak
2020-04-17 11:23 ` Pierre Morel
2020-04-24 3:13 ` Halil Pasic
2020-04-24 16:58 ` Tony Krowiak
2020-04-07 19:20 ` [PATCH v7 05/15] s390/vfio-ap: introduce shadow CRYCB Tony Krowiak
2020-04-16 11:58 ` Cornelia Huck
2020-04-21 21:39 ` Tony Krowiak
2020-04-07 19:20 ` Tony Krowiak [this message]
2020-04-08 10:33 ` [PATCH v7 06/15] s390/vfio-ap: sysfs attribute to display the guest CRYCB Cornelia Huck
2020-04-08 16:38 ` Tony Krowiak
2020-04-08 16:46 ` Cornelia Huck
2020-04-09 14:18 ` Tony Krowiak
2020-04-07 19:20 ` [PATCH v7 07/15] s390/vfio-ap: filter CRYCB bits for unavailable queue devices Tony Krowiak
2020-04-07 19:20 ` [PATCH v7 08/15] s390/vfio_ap: add qlink from ap_matrix_mdev struct to vfio_ap_queue struct Tony Krowiak
2020-04-07 19:20 ` [PATCH v7 09/15] s390/vfio-ap: allow assignment of unavailable AP queues to mdev device Tony Krowiak
2020-04-07 19:20 ` [PATCH v7 10/15] s390/vfio-ap: allow configuration of matrix mdev in use by a KVM guest Tony Krowiak
2020-04-07 19:20 ` [PATCH v7 11/15] s390/vfio-ap: allow hot plug/unplug of AP resources using mdev device Tony Krowiak
2020-04-07 19:20 ` [PATCH v7 12/15] s390/zcrypt: Notify driver on config changed and scan complete callbacks Tony Krowiak
2020-04-07 19:20 ` [PATCH v7 13/15] s390/vfio-ap: handle host AP config change notification Tony Krowiak
2020-04-07 19:20 ` [PATCH v7 14/15] s390/vfio-ap: handle AP bus scan completed notification Tony Krowiak
2020-04-07 19:20 ` [PATCH v7 15/15] s390/vfio-ap: handle probe/remove not due to host AP config changes Tony Krowiak
2020-05-07 15:03 ` [PATCH v7 03/15] s390/zcrypt: driver callback to indicate resource in use Tony Krowiak
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