1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * CPU-measurement facilities 4 * 5 * Copyright IBM Corp. 2012, 2018 6 * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com> 7 * Jan Glauber <jang@linux.vnet.ibm.com> 8 */ 9 #ifndef _ASM_S390_CPU_MF_H 10 #define _ASM_S390_CPU_MF_H 11 12 #include <linux/errno.h> 13 #include <asm/facility.h> 14 15 asm(".include \"asm/cpu_mf-insn.h\"\n"); 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_MTDA (1 << 15) /* loss of MT ctr. data alert */ 23 #define CPU_MF_INT_CF_CACA (1 << 7) /* counter auth. change alert */ 24 #define CPU_MF_INT_CF_LCDA (1 << 6) /* loss of counter data alert */ 25 #define CPU_MF_INT_CF_MASK (CPU_MF_INT_CF_MTDA|CPU_MF_INT_CF_CACA| \ 26 CPU_MF_INT_CF_LCDA) 27 #define CPU_MF_INT_SF_MASK (CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE| \ 28 CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA| \ 29 CPU_MF_INT_SF_LSDA) 30 31 #define CPU_MF_SF_RIBM_NOTAV 0x1 /* Sampling unavailable */ 32 33 /* CPU measurement facility support */ 34 static inline int cpum_cf_avail(void) 35 { 36 return test_facility(40) && test_facility(67); 37 } 38 39 static inline int cpum_sf_avail(void) 40 { 41 return test_facility(40) && test_facility(68); 42 } 43 44 45 struct cpumf_ctr_info { 46 u16 cfvn; 47 u16 auth_ctl; 48 u16 enable_ctl; 49 u16 act_ctl; 50 u16 max_cpu; 51 u16 csvn; 52 u16 max_cg; 53 u16 reserved1; 54 u32 reserved2[12]; 55 } __packed; 56 57 /* QUERY SAMPLING INFORMATION block */ 58 struct hws_qsi_info_block { /* Bit(s) */ 59 unsigned int b0_13:14; /* 0-13: zeros */ 60 unsigned int as:1; /* 14: basic-sampling authorization */ 61 unsigned int ad:1; /* 15: diag-sampling authorization */ 62 unsigned int b16_21:6; /* 16-21: zeros */ 63 unsigned int es:1; /* 22: basic-sampling enable control */ 64 unsigned int ed:1; /* 23: diag-sampling enable control */ 65 unsigned int b24_29:6; /* 24-29: zeros */ 66 unsigned int cs:1; /* 30: basic-sampling activation control */ 67 unsigned int cd:1; /* 31: diag-sampling activation control */ 68 unsigned int bsdes:16; /* 4-5: size of basic sampling entry */ 69 unsigned int dsdes:16; /* 6-7: size of diagnostic sampling entry */ 70 unsigned long min_sampl_rate; /* 8-15: minimum sampling interval */ 71 unsigned long max_sampl_rate; /* 16-23: maximum sampling interval*/ 72 unsigned long tear; /* 24-31: TEAR contents */ 73 unsigned long dear; /* 32-39: DEAR contents */ 74 unsigned int rsvrd0:24; /* 40-42: reserved */ 75 unsigned int ribm:8; /* 43: Reserved by IBM */ 76 unsigned int cpu_speed; /* 44-47: CPU speed */ 77 unsigned long long rsvrd1; /* 48-55: reserved */ 78 unsigned long long rsvrd2; /* 56-63: reserved */ 79 } __packed; 80 81 /* SET SAMPLING CONTROLS request block */ 82 struct hws_lsctl_request_block { 83 unsigned int s:1; /* 0: maximum buffer indicator */ 84 unsigned int h:1; /* 1: part. level reserved for VM use*/ 85 unsigned long long b2_53:52;/* 2-53: zeros */ 86 unsigned int es:1; /* 54: basic-sampling enable control */ 87 unsigned int ed:1; /* 55: diag-sampling enable control */ 88 unsigned int b56_61:6; /* 56-61: - zeros */ 89 unsigned int cs:1; /* 62: basic-sampling activation control */ 90 unsigned int cd:1; /* 63: diag-sampling activation control */ 91 unsigned long interval; /* 8-15: sampling interval */ 92 unsigned long tear; /* 16-23: TEAR contents */ 93 unsigned long dear; /* 24-31: DEAR contents */ 94 /* 32-63: */ 95 unsigned long rsvrd1; /* reserved */ 96 unsigned long rsvrd2; /* reserved */ 97 unsigned long rsvrd3; /* reserved */ 98 unsigned long rsvrd4; /* reserved */ 99 } __packed; 100 101 struct hws_basic_entry { 102 unsigned int def:16; /* 0-15 Data Entry Format */ 103 unsigned int R:4; /* 16-19 reserved */ 104 unsigned int U:4; /* 20-23 Number of unique instruct. */ 105 unsigned int z:2; /* zeros */ 106 unsigned int T:1; /* 26 PSW DAT mode */ 107 unsigned int W:1; /* 27 PSW wait state */ 108 unsigned int P:1; /* 28 PSW Problem state */ 109 unsigned int AS:2; /* 29-30 PSW address-space control */ 110 unsigned int I:1; /* 31 entry valid or invalid */ 111 unsigned int CL:2; /* 32-33 Configuration Level */ 112 unsigned int H:1; /* 34 Host Indicator */ 113 unsigned int LS:1; /* 35 Limited Sampling */ 114 unsigned int:12; 115 unsigned int prim_asn:16; /* primary ASN */ 116 unsigned long long ia; /* Instruction Address */ 117 unsigned long long gpp; /* Guest Program Parameter */ 118 unsigned long long hpp; /* Host Program Parameter */ 119 } __packed; 120 121 struct hws_diag_entry { 122 unsigned int def:16; /* 0-15 Data Entry Format */ 123 unsigned int R:15; /* 16-19 and 20-30 reserved */ 124 unsigned int I:1; /* 31 entry valid or invalid */ 125 u8 data[]; /* Machine-dependent sample data */ 126 } __packed; 127 128 struct hws_combined_entry { 129 struct hws_basic_entry basic; /* Basic-sampling data entry */ 130 struct hws_diag_entry diag; /* Diagnostic-sampling data entry */ 131 } __packed; 132 133 struct hws_trailer_entry { 134 union { 135 struct { 136 unsigned int f:1; /* 0 - Block Full Indicator */ 137 unsigned int a:1; /* 1 - Alert request control */ 138 unsigned int t:1; /* 2 - Timestamp format */ 139 unsigned int :29; /* 3 - 31: Reserved */ 140 unsigned int bsdes:16; /* 32-47: size of basic SDE */ 141 unsigned int dsdes:16; /* 48-63: size of diagnostic SDE */ 142 }; 143 unsigned long long flags; /* 0 - 63: All indicators */ 144 }; 145 unsigned long long overflow; /* 64 - sample Overflow count */ 146 unsigned char timestamp[16]; /* 16 - 31 timestamp */ 147 unsigned long long reserved1; /* 32 -Reserved */ 148 unsigned long long reserved2; /* */ 149 union { /* 48 - reserved for programming use */ 150 struct { 151 unsigned int clock_base:1; /* in progusage2 */ 152 unsigned long long progusage1:63; 153 unsigned long long progusage2; 154 }; 155 unsigned long long progusage[2]; 156 }; 157 } __packed; 158 159 /* Load program parameter */ 160 static inline void lpp(void *pp) 161 { 162 asm volatile(".insn s,0xb2800000,0(%0)\n":: "a" (pp) : "memory"); 163 } 164 165 /* Query counter information */ 166 static inline int qctri(struct cpumf_ctr_info *info) 167 { 168 int rc = -EINVAL; 169 170 asm volatile ( 171 "0: .insn s,0xb28e0000,%1\n" 172 "1: lhi %0,0\n" 173 "2:\n" 174 EX_TABLE(1b, 2b) 175 : "+d" (rc), "=Q" (*info)); 176 return rc; 177 } 178 179 /* Load CPU-counter-set controls */ 180 static inline int lcctl(u64 ctl) 181 { 182 int cc; 183 184 asm volatile ( 185 " .insn s,0xb2840000,%1\n" 186 " ipm %0\n" 187 " srl %0,28\n" 188 : "=d" (cc) : "Q" (ctl) : "cc"); 189 return cc; 190 } 191 192 /* Extract CPU counter */ 193 static inline int __ecctr(u64 ctr, u64 *content) 194 { 195 u64 _content; 196 int cc; 197 198 asm volatile ( 199 " .insn rre,0xb2e40000,%0,%2\n" 200 " ipm %1\n" 201 " srl %1,28\n" 202 : "=d" (_content), "=d" (cc) : "d" (ctr) : "cc"); 203 *content = _content; 204 return cc; 205 } 206 207 /* Extract CPU counter */ 208 static inline int ecctr(u64 ctr, u64 *val) 209 { 210 u64 content; 211 int cc; 212 213 cc = __ecctr(ctr, &content); 214 if (!cc) 215 *val = content; 216 return cc; 217 } 218 219 /* Store CPU counter multiple for a particular counter set */ 220 enum stcctm_ctr_set { 221 EXTENDED = 0, 222 BASIC = 1, 223 PROBLEM_STATE = 2, 224 CRYPTO_ACTIVITY = 3, 225 MT_DIAG = 5, 226 MT_DIAG_CLEARING = 9, /* clears loss-of-MT-ctr-data alert */ 227 }; 228 229 static __always_inline int stcctm(enum stcctm_ctr_set set, u64 range, u64 *dest) 230 { 231 int cc; 232 233 asm volatile ( 234 " STCCTM %2,%3,%1\n" 235 " ipm %0\n" 236 " srl %0,28\n" 237 : "=d" (cc) 238 : "Q" (*dest), "d" (range), "i" (set) 239 : "cc", "memory"); 240 return cc; 241 } 242 243 /* Query sampling information */ 244 static inline int qsi(struct hws_qsi_info_block *info) 245 { 246 int cc = 1; 247 248 asm volatile( 249 "0: .insn s,0xb2860000,%1\n" 250 "1: lhi %0,0\n" 251 "2:\n" 252 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b) 253 : "+d" (cc), "+Q" (*info)); 254 return cc ? -EINVAL : 0; 255 } 256 257 /* Load sampling controls */ 258 static inline int lsctl(struct hws_lsctl_request_block *req) 259 { 260 int cc; 261 262 cc = 1; 263 asm volatile( 264 "0: .insn s,0xb2870000,0(%1)\n" 265 "1: ipm %0\n" 266 " srl %0,28\n" 267 "2:\n" 268 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b) 269 : "+d" (cc), "+a" (req) 270 : "m" (*req) 271 : "cc", "memory"); 272 273 return cc ? -EINVAL : 0; 274 } 275 276 /* Sampling control helper functions */ 277 278 #include <linux/time.h> 279 280 static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi, 281 unsigned long freq) 282 { 283 return (USEC_PER_SEC / freq) * qsi->cpu_speed; 284 } 285 286 static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi, 287 unsigned long rate) 288 { 289 return USEC_PER_SEC * qsi->cpu_speed / rate; 290 } 291 292 #define SDB_TE_ALERT_REQ_MASK 0x4000000000000000UL 293 #define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL 294 295 /* Return TOD timestamp contained in an trailer entry */ 296 static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te) 297 { 298 /* TOD in STCKE format */ 299 if (te->t) 300 return *((unsigned long long *) &te->timestamp[1]); 301 302 /* TOD in STCK format */ 303 return *((unsigned long long *) &te->timestamp[0]); 304 } 305 306 /* Return pointer to trailer entry of an sample data block */ 307 static inline unsigned long *trailer_entry_ptr(unsigned long v) 308 { 309 void *ret; 310 311 ret = (void *) v; 312 ret += PAGE_SIZE; 313 ret -= sizeof(struct hws_trailer_entry); 314 315 return (unsigned long *) ret; 316 } 317 318 /* Return true if the entry in the sample data block table (sdbt) 319 * is a link to the next sdbt */ 320 static inline int is_link_entry(unsigned long *s) 321 { 322 return *s & 0x1ul ? 1 : 0; 323 } 324 325 /* Return pointer to the linked sdbt */ 326 static inline unsigned long *get_next_sdbt(unsigned long *s) 327 { 328 return (unsigned long *) (*s & ~0x1ul); 329 } 330 #endif /* _ASM_S390_CPU_MF_H */ 331