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| author | Harald Freudenberger <freude@linux.ibm.com> | 2022-09-07 20:05:18 +0300 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2023-03-20 13:12:49 +0300 |
| commit | c81cf436e47c34d2ff29e1b3db296f00d55b1c6f (patch) | |
| tree | b1182f93341c5be8ea3d4c692d3617dd3cd719ae /arch/s390 | |
| parent | 4bdf3c3956d863b6823daa185ee3ce3e3a432cf3 (diff) | |
| download | linux-c81cf436e47c34d2ff29e1b3db296f00d55b1c6f.tar.xz | |
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>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/ap.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h index 3442e76d5e3d..92b04d66d69a 100644 --- a/arch/s390/include/asm/ap.h +++ b/arch/s390/include/asm/ap.h @@ -354,6 +354,59 @@ static inline struct ap_queue_status ap_qact(ap_qid_t qid, int ifbit, return reg1.status; } +/* + * ap_bapq(): SE bind AP queue. + * @qid: The AP queue number + * + * Returns AP queue status structure. + * + * Invoking this function in a non-SE environment + * may case a specification exception. + */ +static inline struct ap_queue_status ap_bapq(ap_qid_t qid) +{ + unsigned long reg0 = qid | (7UL << 24); /* fc 7 is BAPQ */ + union ap_queue_status_reg reg1; + + asm volatile( + " lgr 0,%[reg0]\n" /* qid arg into gr0 */ + " .insn rre,0xb2af0000,0,0\n" /* PQAP(BAPQ) */ + " lgr %[reg1],1\n" /* gr1 (status) into reg1 */ + : [reg1] "=&d" (reg1.value) + : [reg0] "d" (reg0) + : "cc", "0", "1"); + + return reg1.status; +} + +/* + * ap_aapq(): SE associate AP queue. + * @qid: The AP queue number + * @sec_idx: The secret index + * + * Returns AP queue status structure. + * + * Invoking this function in a non-SE environment + * may case a specification exception. + */ +static inline struct ap_queue_status ap_aapq(ap_qid_t qid, unsigned int sec_idx) +{ + unsigned long reg0 = qid | (8UL << 24); /* fc 8 is AAPQ */ + unsigned long reg2 = sec_idx; + union ap_queue_status_reg reg1; + + asm volatile( + " lgr 0,%[reg0]\n" /* qid arg into gr0 */ + " lgr 2,%[reg2]\n" /* secret index into gr2 */ + " .insn rre,0xb2af0000,0,0\n" /* PQAP(AAPQ) */ + " lgr %[reg1],1\n" /* gr1 (status) into reg1 */ + : [reg1] "=&d" (reg1.value) + : [reg0] "d" (reg0), [reg2] "d" (reg2) + : "cc", "0", "1", "2"); + + return reg1.status; +} + /** * ap_nqap(): Send message to adjunct processor queue. * @qid: The AP queue number |