diff options
Diffstat (limited to 'arch/s390/kernel/diag.c')
| -rw-r--r-- | arch/s390/kernel/diag.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/s390/kernel/diag.c b/arch/s390/kernel/diag.c index ac6abcd3fe6a..349914571772 100644 --- a/arch/s390/kernel/diag.c +++ b/arch/s390/kernel/diag.c @@ -38,6 +38,7 @@ static const struct diag_desc diag_map[NR_DIAG_STAT] = { [DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" }, [DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" }, [DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" }, + [DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" }, [DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" }, [DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" }, [DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" }, @@ -236,3 +237,31 @@ int diag224(void *ptr) return rc; } EXPORT_SYMBOL(diag224); + +/* + * Diagnose 26C: Access Certain System Information + */ +static inline int __diag26c(void *req, void *resp, enum diag26c_sc subcode) +{ + register unsigned long _req asm("2") = (addr_t) req; + register unsigned long _resp asm("3") = (addr_t) resp; + register unsigned long _subcode asm("4") = subcode; + register unsigned long _rc asm("5") = -EOPNOTSUPP; + + asm volatile( + " sam31\n" + " diag %[rx],%[ry],0x26c\n" + "0: sam64\n" + EX_TABLE(0b,0b) + : "+d" (_rc) + : [rx] "d" (_req), "d" (_resp), [ry] "d" (_subcode) + : "cc", "memory"); + return _rc; +} + +int diag26c(void *req, void *resp, enum diag26c_sc subcode) +{ + diag_stat_inc(DIAG_STAT_X26C); + return __diag26c(req, resp, subcode); +} +EXPORT_SYMBOL(diag26c); |