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 <linux/errno.h> 16 #include <asm/facility.h> 17 18 #define CPU_MF_INT_SF_IAE (1 << 31) /* invalid entry address */ 19 #define CPU_MF_INT_SF_ISE (1 << 30) /* incorrect SDBT entry */ 20 #define CPU_MF_INT_SF_PRA (1 << 29) /* program request alert */ 21 #define CPU_MF_INT_SF_SACA (1 << 23) /* sampler auth. change alert */ 22 #define CPU_MF_INT_SF_LSDA (1 << 22) /* loss of sample data alert */ 23 #define CPU_MF_INT_CF_MTDA (1 << 15) /* loss of MT ctr. data alert */ 24 #define CPU_MF_INT_CF_CACA (1 << 7) /* counter auth. change alert */ 25 #define CPU_MF_INT_CF_LCDA (1 << 6) /* loss of counter data alert */ 26 #define CPU_MF_INT_CF_MASK (CPU_MF_INT_CF_MTDA|CPU_MF_INT_CF_CACA| \ 27 CPU_MF_INT_CF_LCDA) 28 #define CPU_MF_INT_SF_MASK (CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE| \ 29 CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA| \ 30 CPU_MF_INT_SF_LSDA) 31 32 /* CPU measurement facility support */ 33 static inline int cpum_cf_avail(void) 34 { 35 return MACHINE_HAS_LPP && test_facility(67); 36 } 37 38 static inline int cpum_sf_avail(void) 39 { 40 return MACHINE_HAS_LPP && test_facility(68); 41 } 42 43 44 struct cpumf_ctr_info { 45 u16 cfvn; 46 u16 auth_ctl; 47 u16 enable_ctl; 48 u16 act_ctl; 49 u16 max_cpu; 50 u16 csvn; 51 u16 max_cg; 52 u16 reserved1; 53 u32 reserved2[12]; 54 } __packed; 55 56 /* QUERY SAMPLING INFORMATION block */ 57 struct hws_qsi_info_block { /* Bit(s) */ 58 unsigned int b0_13:14; /* 0-13: zeros */ 59 unsigned int as:1; /* 14: basic-sampling authorization */ 60 unsigned int ad:1; /* 15: diag-sampling authorization */ 61 unsigned int b16_21:6; /* 16-21: zeros */ 62 unsigned int es:1; /* 22: basic-sampling enable control */ 63 unsigned int ed:1; /* 23: diag-sampling enable control */ 64 unsigned int b24_29:6; /* 24-29: zeros */ 65 unsigned int cs:1; /* 30: basic-sampling activation control */ 66 unsigned int cd:1; /* 31: diag-sampling activation control */ 67 unsigned int bsdes:16; /* 4-5: size of basic sampling entry */ 68 unsigned int dsdes:16; /* 6-7: size of diagnostic sampling entry */ 69 unsigned long min_sampl_rate; /* 8-15: minimum sampling interval */ 70 unsigned long max_sampl_rate; /* 16-23: maximum sampling interval*/ 71 unsigned long tear; /* 24-31: TEAR contents */ 72 unsigned long dear; /* 32-39: DEAR contents */ 73 unsigned int rsvrd0; /* 40-43: reserved */ 74 unsigned int cpu_speed; /* 44-47: CPU speed */ 75 unsigned long long rsvrd1; /* 48-55: reserved */ 76 unsigned long long rsvrd2; /* 56-63: reserved */ 77 } __packed; 78 79 /* SET SAMPLING CONTROLS request block */ 80 struct hws_lsctl_request_block { 81 unsigned int s:1; /* 0: maximum buffer indicator */ 82 unsigned int h:1; /* 1: part. level reserved for VM use*/ 83 unsigned long long b2_53:52;/* 2-53: zeros */ 84 unsigned int es:1; /* 54: basic-sampling enable control */ 85 unsigned int ed:1; /* 55: diag-sampling enable control */ 86 unsigned int b56_61:6; /* 56-61: - zeros */ 87 unsigned int cs:1; /* 62: basic-sampling activation control */ 88 unsigned int cd:1; /* 63: diag-sampling activation control */ 89 unsigned long interval; /* 8-15: sampling interval */ 90 unsigned long tear; /* 16-23: TEAR contents */ 91 unsigned long dear; /* 24-31: DEAR contents */ 92 /* 32-63: */ 93 unsigned long rsvrd1; /* reserved */ 94 unsigned long rsvrd2; /* reserved */ 95 unsigned long rsvrd3; /* reserved */ 96 unsigned long rsvrd4; /* reserved */ 97 } __packed; 98 99 struct hws_basic_entry { 100 unsigned int def:16; /* 0-15 Data Entry Format */ 101 unsigned int R:4; /* 16-19 reserved */ 102 unsigned int U:4; /* 20-23 Number of unique instruct. */ 103 unsigned int z:2; /* zeros */ 104 unsigned int T:1; /* 26 PSW DAT mode */ 105 unsigned int W:1; /* 27 PSW wait state */ 106 unsigned int P:1; /* 28 PSW Problem state */ 107 unsigned int AS:2; /* 29-30 PSW address-space control */ 108 unsigned int I:1; /* 31 entry valid or invalid */ 109 unsigned int CL:2; /* 32-33 Configuration Level */ 110 unsigned int:14; 111 unsigned int prim_asn:16; /* primary ASN */ 112 unsigned long long ia; /* Instruction Address */ 113 unsigned long long gpp; /* Guest Program Parameter */ 114 unsigned long long hpp; /* Host Program Parameter */ 115 } __packed; 116 117 struct hws_diag_entry { 118 unsigned int def:16; /* 0-15 Data Entry Format */ 119 unsigned int R:14; /* 16-19 and 20-30 reserved */ 120 unsigned int I:1; /* 31 entry valid or invalid */ 121 u8 data[]; /* Machine-dependent sample data */ 122 } __packed; 123 124 struct hws_combined_entry { 125 struct hws_basic_entry basic; /* Basic-sampling data entry */ 126 struct hws_diag_entry diag; /* Diagnostic-sampling data entry */ 127 } __packed; 128 129 struct hws_trailer_entry { 130 union { 131 struct { 132 unsigned int f:1; /* 0 - Block Full Indicator */ 133 unsigned int a:1; /* 1 - Alert request control */ 134 unsigned int t:1; /* 2 - Timestamp format */ 135 unsigned long long:61; /* 3 - 63: Reserved */ 136 }; 137 unsigned long long flags; /* 0 - 63: All indicators */ 138 }; 139 unsigned long long overflow; /* 64 - sample Overflow count */ 140 unsigned char timestamp[16]; /* 16 - 31 timestamp */ 141 unsigned long long reserved1; /* 32 -Reserved */ 142 unsigned long long reserved2; /* */ 143 unsigned long long progusage1; /* 48 - reserved for programming use */ 144 unsigned long long progusage2; /* */ 145 } __packed; 146 147 /* Query counter information */ 148 static inline int qctri(struct cpumf_ctr_info *info) 149 { 150 int rc = -EINVAL; 151 152 asm volatile ( 153 "0: .insn s,0xb28e0000,%1\n" 154 "1: lhi %0,0\n" 155 "2:\n" 156 EX_TABLE(1b, 2b) 157 : "+d" (rc), "=Q" (*info)); 158 return rc; 159 } 160 161 /* Load CPU-counter-set controls */ 162 static inline int lcctl(u64 ctl) 163 { 164 int cc; 165 166 asm volatile ( 167 " .insn s,0xb2840000,%1\n" 168 " ipm %0\n" 169 " srl %0,28\n" 170 : "=d" (cc) : "m" (ctl) : "cc"); 171 return cc; 172 } 173 174 /* Extract CPU counter */ 175 static inline int __ecctr(u64 ctr, u64 *content) 176 { 177 u64 _content; 178 int cc; 179 180 asm volatile ( 181 " .insn rre,0xb2e40000,%0,%2\n" 182 " ipm %1\n" 183 " srl %1,28\n" 184 : "=d" (_content), "=d" (cc) : "d" (ctr) : "cc"); 185 *content = _content; 186 return cc; 187 } 188 189 /* Extract CPU counter */ 190 static inline int ecctr(u64 ctr, u64 *val) 191 { 192 u64 content; 193 int cc; 194 195 cc = __ecctr(ctr, &content); 196 if (!cc) 197 *val = content; 198 return cc; 199 } 200 201 /* Store CPU counter multiple for the MT utilization counter set */ 202 static inline int stcctm5(u64 num, u64 *val) 203 { 204 int cc; 205 206 asm volatile ( 207 " .insn rsy,0xeb0000000017,%2,5,%1\n" 208 " ipm %0\n" 209 " srl %0,28\n" 210 : "=d" (cc) 211 : "Q" (*val), "d" (num) 212 : "cc", "memory"); 213 return cc; 214 } 215 216 /* Query sampling information */ 217 static inline int qsi(struct hws_qsi_info_block *info) 218 { 219 int cc = 1; 220 221 asm volatile( 222 "0: .insn s,0xb2860000,%1\n" 223 "1: lhi %0,0\n" 224 "2:\n" 225 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b) 226 : "+d" (cc), "+Q" (*info)); 227 return cc ? -EINVAL : 0; 228 } 229 230 /* Load sampling controls */ 231 static inline int lsctl(struct hws_lsctl_request_block *req) 232 { 233 int cc; 234 235 cc = 1; 236 asm volatile( 237 "0: .insn s,0xb2870000,0(%1)\n" 238 "1: ipm %0\n" 239 " srl %0,28\n" 240 "2:\n" 241 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b) 242 : "+d" (cc), "+a" (req) 243 : "m" (*req) 244 : "cc", "memory"); 245 246 return cc ? -EINVAL : 0; 247 } 248 249 /* Sampling control helper functions */ 250 251 #include <linux/time.h> 252 253 static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi, 254 unsigned long freq) 255 { 256 return (USEC_PER_SEC / freq) * qsi->cpu_speed; 257 } 258 259 static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi, 260 unsigned long rate) 261 { 262 return USEC_PER_SEC * qsi->cpu_speed / rate; 263 } 264 265 #define SDB_TE_ALERT_REQ_MASK 0x4000000000000000UL 266 #define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL 267 268 /* Return TOD timestamp contained in an trailer entry */ 269 static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te) 270 { 271 /* TOD in STCKE format */ 272 if (te->t) 273 return *((unsigned long long *) &te->timestamp[1]); 274 275 /* TOD in STCK format */ 276 return *((unsigned long long *) &te->timestamp[0]); 277 } 278 279 /* Return pointer to trailer entry of an sample data block */ 280 static inline unsigned long *trailer_entry_ptr(unsigned long v) 281 { 282 void *ret; 283 284 ret = (void *) v; 285 ret += PAGE_SIZE; 286 ret -= sizeof(struct hws_trailer_entry); 287 288 return (unsigned long *) ret; 289 } 290 291 /* Return if the entry in the sample data block table (sdbt) 292 * is a link to the next sdbt */ 293 static inline int is_link_entry(unsigned long *s) 294 { 295 return *s & 0x1ul ? 1 : 0; 296 } 297 298 /* Return pointer to the linked sdbt */ 299 static inline unsigned long *get_next_sdbt(unsigned long *s) 300 { 301 return (unsigned long *) (*s & ~0x1ul); 302 } 303 #endif /* _ASM_S390_CPU_MF_H */ 304