From: Harald Freudenberger <freude@linux.ibm.com>
Date: Wed, 7 Sep 2022 16:04:03 +0000 (+0200)
Subject: s390/ap: provide F bit parameter for ap_rapq() and ap_zapq()
X-Git-Tag: v6.6.7~2936^2~77
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4bdf3c3956d863b6823daa185ee3ce3e3a432cf3;p=platform%2Fkernel%2Flinux-starfive.git

s390/ap: provide F bit parameter for ap_rapq() and ap_zapq()

Extent the ap inline functions ap_rapq() (calls PQAP(RAPQ))
and ap_zapq() (calls PQAP(ZAPQ)) with a new parameter to
enable the new architectured F bit which forces an
unassociate and/or unbind on a secure execution associated
and/or bound queue.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---

diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h
index ba8da3f..3442e76 100644
--- a/arch/s390/include/asm/ap.h
+++ b/arch/s390/include/asm/ap.h
@@ -159,14 +159,18 @@ static inline struct ap_queue_status ap_test_queue(ap_qid_t qid, int tbit,
 /**
  * ap_pqap_rapq(): Reset adjunct processor queue.
  * @qid: The AP queue number
+ * @fbit: if != 0 set F bit
  *
  * Returns AP queue status structure.
  */
-static inline struct ap_queue_status ap_rapq(ap_qid_t qid)
+static inline struct ap_queue_status ap_rapq(ap_qid_t qid, int fbit)
 {
 	unsigned long reg0 = qid | (1UL << 24);  /* fc 1UL is RAPQ */
 	union ap_queue_status_reg reg1;
 
+	if (fbit)
+		reg0 |= 1UL << 22;
+
 	asm volatile(
 		"	lgr	0,%[reg0]\n"		/* qid arg into gr0 */
 		"	.insn	rre,0xb2af0000,0,0\n"	/* PQAP(RAPQ) */
@@ -180,14 +184,18 @@ 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
+ * @fbit: if != 0 set F bit
  *
  * Returns AP queue status structure.
  */
-static inline struct ap_queue_status ap_zapq(ap_qid_t qid)
+static inline struct ap_queue_status ap_zapq(ap_qid_t qid, int fbit)
 {
 	unsigned long reg0 = qid | (2UL << 24);  /* fc 2UL is ZAPQ */
 	union ap_queue_status_reg reg1;
 
+	if (fbit)
+		reg0 |= 1UL << 22;
+
 	asm volatile(
 		"	lgr	0,%[reg0]\n"		/* qid arg into gr0 */
 		"	.insn	rre,0xb2af0000,0,0\n"	/* PQAP(ZAPQ) */
diff --git a/drivers/s390/crypto/ap_queue.c b/drivers/s390/crypto/ap_queue.c
index 1c08b28..8517e1c 100644
--- a/drivers/s390/crypto/ap_queue.c
+++ b/drivers/s390/crypto/ap_queue.c
@@ -322,7 +322,7 @@ static enum ap_sm_wait ap_sm_reset(struct ap_queue *aq)
 {
 	struct ap_queue_status status;
 
-	status = ap_rapq(aq->qid);
+	status = ap_rapq(aq->qid, 0);
 	switch (status.response_code) {
 	case AP_RESPONSE_NORMAL:
 	case AP_RESPONSE_RESET_IN_PROGRESS:
@@ -936,7 +936,7 @@ void ap_queue_remove(struct ap_queue *aq)
 	 * to the initial value AP_DEV_STATE_UNINITIATED.
 	 */
 	spin_lock_bh(&aq->lock);
-	ap_zapq(aq->qid);
+	ap_zapq(aq->qid, 0);
 	aq->dev_state = AP_DEV_STATE_UNINITIATED;
 	spin_unlock_bh(&aq->lock);
 }
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index 31de464..cfbcb86 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -1657,7 +1657,7 @@ static int vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q)
 	if (!q)
 		return 0;
 retry_zapq:
-	status = ap_zapq(q->apqn);
+	status = ap_zapq(q->apqn, 0);
 	q->reset_rc = status.response_code;
 	switch (status.response_code) {
 	case AP_RESPONSE_NORMAL:
diff --git a/drivers/s390/crypto/zcrypt_cex2c.c b/drivers/s390/crypto/zcrypt_cex2c.c
index 78f8d68..251b5bd 100644
--- a/drivers/s390/crypto/zcrypt_cex2c.c
+++ b/drivers/s390/crypto/zcrypt_cex2c.c
@@ -338,7 +338,7 @@ static int zcrypt_cex2c_queue_probe(struct ap_device *ap_dev)
 	zq->queue = aq;
 	zq->online = 1;
 	atomic_set(&zq->load, 0);
-	ap_rapq(aq->qid);
+	ap_rapq(aq->qid, 0);
 	rc = zcrypt_cex2c_rng_supported(aq);
 	if (rc < 0) {
 		zcrypt_queue_free(zq);