From e12aa0b5b2fbf324daf62245e76083e6065ec47c Mon Sep 17 00:00:00 2001 From: "Jason J. Herne" Date: Mon, 15 Apr 2024 11:25:52 -0400 Subject: s390/vfio-ap: Add sysfs attr, ap_config, to export mdev state Add ap_config sysfs attribute. This will provide the means for setting or displaying the adapters, domains and control domains assigned to the vfio-ap mediated device in a single operation. This sysfs attribute is comprised of three masks: One for adapters, one for domains, and one for control domains. This attribute is intended to be used by mdevctl to query a vfio-ap mediated device's state. Signed-off-by: "Jason J. Herne" Reviewed-by: Tony Krowiak Tested-by: Matthew Rosato Link: https://lore.kernel.org/r/20240415152555.13152-3-jjherne@linux.ibm.com Signed-off-by: Alexander Gordeev --- drivers/s390/crypto/vfio_ap_ops.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'drivers/s390') diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index fc169bc61593..e01f53a3c5b7 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -1570,6 +1570,32 @@ static ssize_t guest_matrix_show(struct device *dev, } static DEVICE_ATTR_RO(guest_matrix); +static ssize_t write_ap_bitmap(unsigned long *bitmap, char *buf, int offset, char sep) +{ + return sysfs_emit_at(buf, offset, "0x%016lx%016lx%016lx%016lx%c", + bitmap[0], bitmap[1], bitmap[2], bitmap[3], sep); +} + +static ssize_t ap_config_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev); + int idx = 0; + + idx += write_ap_bitmap(matrix_mdev->matrix.apm, buf, idx, ','); + idx += write_ap_bitmap(matrix_mdev->matrix.aqm, buf, idx, ','); + idx += write_ap_bitmap(matrix_mdev->matrix.adm, buf, idx, '\n'); + + return idx; +} + +static ssize_t ap_config_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + return count; +} +static DEVICE_ATTR_RW(ap_config); + static struct attribute *vfio_ap_mdev_attrs[] = { &dev_attr_assign_adapter.attr, &dev_attr_unassign_adapter.attr, @@ -1577,6 +1603,7 @@ static struct attribute *vfio_ap_mdev_attrs[] = { &dev_attr_unassign_domain.attr, &dev_attr_assign_control_domain.attr, &dev_attr_unassign_control_domain.attr, + &dev_attr_ap_config.attr, &dev_attr_control_domains.attr, &dev_attr_matrix.attr, &dev_attr_guest_matrix.attr, -- cgit v1.2.3-70-g09d2