1 /* 2 * CPU-measurement facilities 3 * 4 * Copyright IBM Corp. 2012 5 * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com> 6 * Jan Glauber <jang@linux.vnet.ibm.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License (version 2 only) 10 * as published by the Free Software Foundation. 11 */ 12 #ifndef _ASM_S390_CPU_MF_H 13 #define _ASM_S390_CPU_MF_H 14 15 #include <asm/facility.h> 16 17 #define CPU_MF_INT_SF_IAE (1 << 31) /* invalid entry address */ 18 #define CPU_MF_INT_SF_ISE (1 << 30) /* incorrect SDBT entry */ 19 #define CPU_MF_INT_SF_PRA (1 << 29) /* program request alert */ 20 #define CPU_MF_INT_SF_SACA (1 << 23) /* sampler auth. change alert */ 21 #define CPU_MF_INT_SF_LSDA (1 << 22) /* loss of sample data alert */ 22 #define CPU_MF_INT_CF_CACA (1 << 7) /* counter auth. change alert */ 23 #define CPU_MF_INT_CF_LCDA (1 << 6) /* loss of counter data alert */ 24 25 #define CPU_MF_INT_CF_MASK (CPU_MF_INT_CF_CACA|CPU_MF_INT_CF_LCDA) 26 #define CPU_MF_INT_SF_MASK (CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE| \ 27 CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA| \ 28 CPU_MF_INT_SF_LSDA) 29 30 /* CPU measurement facility support */ 31 static inline int cpum_cf_avail(void) 32 { 33 return MACHINE_HAS_SPP && test_facility(67); 34 } 35 36 static inline int cpum_sf_avail(void) 37 { 38 return MACHINE_HAS_SPP && test_facility(68); 39 } 40 41 42 struct cpumf_ctr_info { 43 u16 cfvn; 44 u16 auth_ctl; 45 u16 enable_ctl; 46 u16 act_ctl; 47 u16 max_cpu; 48 u16 csvn; 49 u16 max_cg; 50 u16 reserved1; 51 u32 reserved2[12]; 52 } __packed; 53 54 /* Query counter information */ 55 static inline int qctri(struct cpumf_ctr_info *info) 56 { 57 int rc = -EINVAL; 58 59 asm volatile ( 60 "0: .insn s,0xb28e0000,%1\n" 61 "1: lhi %0,0\n" 62 "2:\n" 63 EX_TABLE(1b, 2b) 64 : "+d" (rc), "=Q" (*info)); 65 return rc; 66 } 67 68 /* Load CPU-counter-set controls */ 69 static inline int lcctl(u64 ctl) 70 { 71 int cc; 72 73 asm volatile ( 74 " .insn s,0xb2840000,%1\n" 75 " ipm %0\n" 76 " srl %0,28\n" 77 : "=d" (cc) : "m" (ctl) : "cc"); 78 return cc; 79 } 80 81 /* Extract CPU counter */ 82 static inline int ecctr(u64 ctr, u64 *val) 83 { 84 register u64 content asm("4") = 0; 85 int cc; 86 87 asm volatile ( 88 " .insn rre,0xb2e40000,%0,%2\n" 89 " ipm %1\n" 90 " srl %1,28\n" 91 : "=d" (content), "=d" (cc) : "d" (ctr) : "cc"); 92 if (!cc) 93 *val = content; 94 return cc; 95 } 96 97 #endif /* _ASM_S390_CPU_MF_H */ 98