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s390/zcrypt: Add ZAPQ inline function.

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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: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Harald Freudenberger 2018-06-07 07:19:48 +02:00 committed by Martin Schwidefsky
parent 7daf201d7f
commit ea3c4185ef
1 changed files with 19 additions and 0 deletions
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19
drivers/s390/crypto/ap_asm.h
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@ -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