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s390/ap: new low level inline functions ap_bapq() and ap_aapq()
Introduce two new low level functions ap_bapq() (calls PQAP(BAPQ)) and ap_aapq (calls PQAP(AAPQ)). Both functions are only meant to be used in SE environment with the SE AP binding facility available. Signed-off-by: Harald Freudenberger <freude@linux.ibm.com> Reviewed-by: Holger Dengler <dengler@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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@ -354,6 +354,59 @@ static inline struct ap_queue_status ap_qact(ap_qid_t qid, int ifbit,
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return reg1.status;
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}
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/*
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* ap_bapq(): SE bind AP queue.
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* @qid: The AP queue number
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*
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* Returns AP queue status structure.
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*
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* Invoking this function in a non-SE environment
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* may case a specification exception.
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*/
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static inline struct ap_queue_status ap_bapq(ap_qid_t qid)
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{
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unsigned long reg0 = qid | (7UL << 24); /* fc 7 is BAPQ */
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union ap_queue_status_reg reg1;
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asm volatile(
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" lgr 0,%[reg0]\n" /* qid arg into gr0 */
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" .insn rre,0xb2af0000,0,0\n" /* PQAP(BAPQ) */
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" lgr %[reg1],1\n" /* gr1 (status) into reg1 */
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: [reg1] "=&d" (reg1.value)
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: [reg0] "d" (reg0)
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: "cc", "0", "1");
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return reg1.status;
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}
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/*
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* ap_aapq(): SE associate AP queue.
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* @qid: The AP queue number
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* @sec_idx: The secret index
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*
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* Returns AP queue status structure.
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*
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* Invoking this function in a non-SE environment
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* may case a specification exception.
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*/
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static inline struct ap_queue_status ap_aapq(ap_qid_t qid, unsigned int sec_idx)
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{
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unsigned long reg0 = qid | (8UL << 24); /* fc 8 is AAPQ */
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unsigned long reg2 = sec_idx;
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union ap_queue_status_reg reg1;
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asm volatile(
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" lgr 0,%[reg0]\n" /* qid arg into gr0 */
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" lgr 2,%[reg2]\n" /* secret index into gr2 */
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" .insn rre,0xb2af0000,0,0\n" /* PQAP(AAPQ) */
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" lgr %[reg1],1\n" /* gr1 (status) into reg1 */
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: [reg1] "=&d" (reg1.value)
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: [reg0] "d" (reg0), [reg2] "d" (reg2)
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: "cc", "0", "1", "2");
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return reg1.status;
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}
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/**
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* ap_nqap(): Send message to adjunct processor queue.
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* @qid: The AP queue number
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