s390/zcrypt: add ap_adapter_mask sysfs attribute

This patch provides a new sysfs attribute file
/sys/bus/ap/ap_adapter_mask. This read-only attribute
refrects the apm field as it is found in the PQAP(QCI)
crypto info.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 15bca75..048665e 100644 (file)
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -1037,6 +1037,21 @@ static ssize_t ap_usage_domain_mask_show(struct bus_type *bus, char *buf)
 
 static BUS_ATTR_RO(ap_usage_domain_mask);
 
+static ssize_t ap_adapter_mask_show(struct bus_type *bus, char *buf)
+{
+       if (!ap_configuration)  /* QCI not supported */
+               return snprintf(buf, PAGE_SIZE, "not supported\n");
+
+       return snprintf(buf, PAGE_SIZE,
+                       "0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
+                       ap_configuration->apm[0], ap_configuration->apm[1],
+                       ap_configuration->apm[2], ap_configuration->apm[3],
+                       ap_configuration->apm[4], ap_configuration->apm[5],
+                       ap_configuration->apm[6], ap_configuration->apm[7]);
+}
+
+static BUS_ATTR_RO(ap_adapter_mask);
+
 static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf)
 {
        return snprintf(buf, PAGE_SIZE, "%d\n",
@@ -1195,6 +1210,7 @@ static struct bus_attribute *const ap_bus_attrs[] = {
        &bus_attr_ap_domain,
        &bus_attr_ap_control_domain_mask,
        &bus_attr_ap_usage_domain_mask,
+       &bus_attr_ap_adapter_mask,
        &bus_attr_config_time,
        &bus_attr_poll_thread,
        &bus_attr_ap_interrupts,