From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Krowiak Subject: [PATCH v6 16/21] s390: vfio-ap: sysfs interface to view guest matrix Date: Fri, 29 Jun 2018 17:11:18 -0400 Message-ID: <1530306683-7270-17-git-send-email-akrowiak@linux.vnet.ibm.com> References: <1530306683-7270-1-git-send-email-akrowiak@linux.vnet.ibm.com> Return-path: In-Reply-To: <1530306683-7270-1-git-send-email-akrowiak@linux.vnet.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-Archive: List-Post: To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.com, kwankhede@nvidia.com, bjsdjshi@linux.vnet.ibm.com, pbonzini@redhat.com, alex.williamson@redhat.com, pmorel@linux.vnet.ibm.com, alifm@linux.vnet.ibm.com, mjrosato@linux.vnet.ibm.com, jjherne@linux.vnet.ibm.com, thuth@redhat.com, pasic@linux.vnet.ibm.com, berrange@redhat.com, fiuczy@linux.vnet.ibm.com, buendgen@de.ibm.com, akrowiak@linux.vnet.ibm.com, Tony Krowiak List-ID: From: Tony Krowiak Provides a sysfs interface to view the AP matrix configured for the guest that is using the mdev matrix device. The relevant sysfs structures are: /sys/devices/vfio_ap ... [matrix] ...... [mdev_supported_types] ......... [vfio_ap-passthrough] ............ [devices] ...............[$uuid] .................. guest_matrix To view the matrix configured for the guest, print the guest_matrix file: cat guest_matrix If no guest is using the device, then the output will be an emtpy string. Signed-off-by: Tony Krowiak --- drivers/s390/crypto/vfio_ap_ops.c | 39 +++++++++++++++++++++++++++++++++++++ 1 files changed, 39 insertions(+), 0 deletions(-) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 98bd0a1..bc05d40 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -730,6 +730,44 @@ static ssize_t matrix_show(struct device *dev, struct device_attribute *attr, } DEVICE_ATTR_RO(matrix); +static unsigned long *kvm_ap_get_crycb_apm(struct ap_matrix_mdev *matrix_mdev); + +static unsigned long *kvm_ap_get_crycb_aqm(struct ap_matrix_mdev *matrix_mdev); + +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 *apm, *aqm; + unsigned long napm = matrix_mdev->matrix.apm_max + 1; + unsigned long naqm = matrix_mdev->matrix.aqm_max + 1; + int nchars = 0; + int n; + + if (!matrix_mdev->kvm) + return nchars; + + apm = kvm_ap_get_crycb_apm(matrix_mdev); + for_each_set_bit_inv(apid, apm, napm) { + n = sprintf(bufpos, "%02lx\n", apid); + bufpos += n; + nchars += n; + + aqm = kvm_ap_get_crycb_aqm(matrix_mdev); + for_each_set_bit_inv(apqi, aqm, naqm) { + n = sprintf(bufpos, "%02lx.%04lx\n", apid, apqi); + bufpos += n; + nchars += n; + } + } + + return nchars; +} +DEVICE_ATTR_RO(guest_matrix); static struct attribute *vfio_ap_mdev_attrs[] = { &dev_attr_assign_adapter.attr, @@ -740,6 +778,7 @@ static ssize_t matrix_show(struct device *dev, struct device_attribute *attr, &dev_attr_unassign_control_domain.attr, &dev_attr_control_domains.attr, &dev_attr_matrix.attr, + &dev_attr_guest_matrix.attr, NULL, }; -- 1.7.1