From ea3c4185efb34e3157caf0529be8f1a68acc0550 Mon Sep 17 00:00:00 2001 From: Harald Freudenberger Date: Thu, 7 Jun 2018 07:19:48 +0200 Subject: [PATCH] s390/zcrypt: Add ZAPQ inline function. 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 Signed-off-by: Martin Schwidefsky --- 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 @@ -70,6 +70,25 @@ static inline struct ap_queue_status ap_rapq(ap_qid_t qid) } /** + * 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 * @qirqctrl: struct ap_qirq_ctrl (64 bit value) -- 2.11.0