lkml.org 
[lkml]   [2018]   [Aug]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v8 01/22] s390/zcrypt: Add ZAPQ inline function.
Date
From: Harald Freudenberger <freude@de.ibm.com>

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@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
---
drivers/s390/crypto/ap_asm.h | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/drivers/s390/crypto/ap_asm.h b/drivers/s390/crypto/ap_asm.h
index 16b59ce..b22d30a 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)
--
1.7.1
\
 
 \ /
  Last update: 2018-08-08 16:45    [W:0.277 / U:7.132 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site