From: Harald Freudenberger <freude@xxxxxxxxxx>
Added new inline function ap_pqap_zapq()
which is a C inline function wrapper for
the AP PQAP(ZAPQ) instruction.
Signed-off-by: Harald Freudenberger <freude@xxxxxxxxxx>
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
drivers/s390/crypto/ap_asm.h | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/s390/crypto/ap_asm.h b/drivers/s390/crypto/ap_asm.h
index 16b59ce5e01d..b22d30aaf810 100644
--- a/drivers/s390/crypto/ap_asm.h
+++ b/drivers/s390/crypto/ap_asm.h
@@ -69,6 +69,25 @@ static inline struct ap_queue_status ap_rapq(ap_qid_t qid)
return reg1;
}
+/**
+ * ap_pqap_zapq(): Reset and zeroize adjunct processor queue.
+ * @qid: The AP queue number
+ *
+ * Returns AP queue status structure.
+ */
+static inline struct ap_queue_status ap_zapq(ap_qid_t qid)
+{
+ register unsigned long reg0 asm ("0") = qid | (2UL << 24);
+ register struct ap_queue_status reg1 asm ("1");
+
+ asm volatile(
+ ".long 0xb2af0000" /* PQAP(ZAPQ) */
+ : "=d" (reg1)
+ : "d" (reg0)
+ : "cc");
+ return reg1;
+}
+
/**
* ap_aqic(): Control interruption for a specific AP.
* @qid: The AP queue number
--
2.17.0
