diff options
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/cpu_mf-insn.h | 22 | ||||
| -rw-r--r-- | arch/s390/include/asm/cpu_mf.h | 17 |
2 files changed, 39 insertions, 0 deletions
diff --git a/arch/s390/include/asm/cpu_mf-insn.h b/arch/s390/include/asm/cpu_mf-insn.h new file mode 100644 index 000000000000..a68b362e0964 --- /dev/null +++ b/arch/s390/include/asm/cpu_mf-insn.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Support for CPU-MF instructions + * + * Copyright IBM Corp. 2019 + * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com> + */ +#ifndef _ASM_S390_CPU_MF_INSN_H +#define _ASM_S390_CPU_MF_INSN_H + +#ifdef __ASSEMBLY__ + +/* Macro to generate the STCCTM instruction with a customized + * M3 field designating the counter set. + */ +.macro STCCTM r1 m3 db2 + .insn rsy,0xeb0000000017,\r1,\m3 & 0xf,\db2 +.endm + +#endif /* __ASSEMBLY__ */ + +#endif diff --git a/arch/s390/include/asm/cpu_mf.h b/arch/s390/include/asm/cpu_mf.h index bf2cbff926ef..53ba4f2ca296 100644 --- a/arch/s390/include/asm/cpu_mf.h +++ b/arch/s390/include/asm/cpu_mf.h @@ -12,6 +12,8 @@ #include <linux/errno.h> #include <asm/facility.h> +asm(".include \"asm/cpu_mf-insn.h\"\n"); + #define CPU_MF_INT_SF_IAE (1 << 31) /* invalid entry address */ #define CPU_MF_INT_SF_ISE (1 << 30) /* incorrect SDBT entry */ #define CPU_MF_INT_SF_PRA (1 << 29) /* program request alert */ @@ -209,6 +211,21 @@ static inline int ecctr(u64 ctr, u64 *val) return cc; } +/* Store CPU counter multiple for a particular counter set */ +static inline int stcctm(u8 set, u64 range, u64 *dest) +{ + int cc; + + asm volatile ( + " STCCTM %2,%3,%1\n" + " ipm %0\n" + " srl %0,28\n" + : "=d" (cc) + : "Q" (*dest), "d" (range), "i" (set) + : "cc", "memory"); + return cc; +} + /* Store CPU counter multiple for the MT utilization counter set */ static inline int stcctm5(u64 num, u64 *val) { |