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/asm-extable.h> 14 #include <asm/facility.h> 15 16 asm(".include \"asm/cpu_mf-insn.h\"\n"); 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 #define CPU_MF_SF_RIBM_NOTAV 0x1 /* Sampling unavailable */ 33 34 /* CPU measurement facility support */ 35 static inline int cpum_cf_avail(void) 36 { 37 return test_facility(40) && test_facility(67); 38 } 39 40 static inline int cpum_sf_avail(void) 41 { 42 return test_facility(40) && test_facility(68); 43 } 44 45 46 struct cpumf_ctr_info { 47 u16 cfvn; 48 u16 auth_ctl; 49 u16 enable_ctl; 50 u16 act_ctl; 51 u16 max_cpu; 52 u16 csvn; 53 u16 max_cg; 54 u16 reserved1; 55 u32 reserved2[12]; 56 } __packed; 57 58 /* QUERY SAMPLING INFORMATION block */ 59 struct hws_qsi_info_block { /* Bit(s) */ 60 unsigned int b0_13:14; /* 0-13: zeros */ 61 unsigned int as:1; /* 14: basic-sampling authorization */ 62 unsigned int ad:1; /* 15: diag-sampling authorization */ 63 unsigned int b16_21:6; /* 16-21: zeros */ 64 unsigned int es:1; /* 22: basic-sampling enable control */ 65 unsigned int ed:1; /* 23: diag-sampling enable control */ 66 unsigned int b24_29:6; /* 24-29: zeros */ 67 unsigned int cs:1; /* 30: basic-sampling activation control */ 68 unsigned int cd:1; /* 31: diag-sampling activation control */ 69 unsigned int bsdes:16; /* 4-5: size of basic sampling entry */ 70 unsigned int dsdes:16; /* 6-7: size of diagnostic sampling entry */ 71 unsigned long min_sampl_rate; /* 8-15: minimum sampling interval */ 72 unsigned long max_sampl_rate; /* 16-23: maximum sampling interval*/ 73 unsigned long tear; /* 24-31: TEAR contents */ 74 unsigned long dear; /* 32-39: DEAR contents */ 75 unsigned int rsvrd0:24; /* 40-42: reserved */ 76 unsigned int ribm:8; /* 43: Reserved by IBM */ 77 unsigned int cpu_speed; /* 44-47: CPU speed */ 78 unsigned long long rsvrd1; /* 48-55: reserved */ 79 unsigned long long rsvrd2; /* 56-63: reserved */ 80 } __packed; 81 82 /* SET SAMPLING CONTROLS request block */ 83 struct hws_lsctl_request_block { 84 unsigned int s:1; /* 0: maximum buffer indicator */ 85 unsigned int h:1; /* 1: part. level reserved for VM use*/ 86 unsigned long long b2_53:52;/* 2-53: zeros */ 87 unsigned int es:1; /* 54: basic-sampling enable control */ 88 unsigned int ed:1; /* 55: diag-sampling enable control */ 89 unsigned int b56_61:6; /* 56-61: - zeros */ 90 unsigned int cs:1; /* 62: basic-sampling activation control */ 91 unsigned int cd:1; /* 63: diag-sampling activation control */ 92 unsigned long interval; /* 8-15: sampling interval */ 93 unsigned long tear; /* 16-23: TEAR contents */ 94 unsigned long dear; /* 24-31: DEAR contents */ 95 /* 32-63: */ 96 unsigned long rsvrd1; /* reserved */ 97 unsigned long rsvrd2; /* reserved */ 98 unsigned long rsvrd3; /* reserved */ 99 unsigned long rsvrd4; /* reserved */ 100 } __packed; 101 102 struct hws_basic_entry { 103 unsigned int def:16; /* 0-15 Data Entry Format */ 104 unsigned int R:4; /* 16-19 reserved */ 105 unsigned int U:4; /* 20-23 Number of unique instruct. */ 106 unsigned int z:2; /* zeros */ 107 unsigned int T:1; /* 26 PSW DAT mode */ 108 unsigned int W:1; /* 27 PSW wait state */ 109 unsigned int P:1; /* 28 PSW Problem state */ 110 unsigned int AS:2; /* 29-30 PSW address-space control */ 111 unsigned int I:1; /* 31 entry valid or invalid */ 112 unsigned int CL:2; /* 32-33 Configuration Level */ 113 unsigned int H:1; /* 34 Host Indicator */ 114 unsigned int LS:1; /* 35 Limited Sampling */ 115 unsigned int:12; 116 unsigned int prim_asn:16; /* primary ASN */ 117 unsigned long long ia; /* Instruction Address */ 118 unsigned long long gpp; /* Guest Program Parameter */ 119 unsigned long long hpp; /* Host Program Parameter */ 120 } __packed; 121 122 struct hws_diag_entry { 123 unsigned int def:16; /* 0-15 Data Entry Format */ 124 unsigned int R:15; /* 16-19 and 20-30 reserved */ 125 unsigned int I:1; /* 31 entry valid or invalid */ 126 u8 data[]; /* Machine-dependent sample data */ 127 } __packed; 128 129 struct hws_combined_entry { 130 struct hws_basic_entry basic; /* Basic-sampling data entry */ 131 struct hws_diag_entry diag; /* Diagnostic-sampling data entry */ 132 } __packed; 133 134 struct hws_trailer_entry { 135 union { 136 struct { 137 unsigned int f:1; /* 0 - Block Full Indicator */ 138 unsigned int a:1; /* 1 - Alert request control */ 139 unsigned int t:1; /* 2 - Timestamp format */ 140 unsigned int :29; /* 3 - 31: Reserved */ 141 unsigned int bsdes:16; /* 32-47: size of basic SDE */ 142 unsigned int dsdes:16; /* 48-63: size of diagnostic SDE */ 143 }; 144 unsigned long long flags; /* 0 - 63: All indicators */ 145 }; 146 unsigned long long overflow; /* 64 - sample Overflow count */ 147 unsigned char timestamp[16]; /* 16 - 31 timestamp */ 148 unsigned long long reserved1; /* 32 -Reserved */ 149 unsigned long long reserved2; /* */ 150 union { /* 48 - reserved for programming use */ 151 struct { 152 unsigned int clock_base:1; /* in progusage2 */ 153 unsigned long long progusage1:63; 154 unsigned long long progusage2; 155 }; 156 unsigned long long progusage[2]; 157 }; 158 } __packed; 159 160 /* Load program parameter */ 161 static inline void lpp(void *pp) 162 { 163 asm volatile("lpp 0(%0)\n" :: "a" (pp) : "memory"); 164 } 165 166 /* Query counter information */ 167 static inline int qctri(struct cpumf_ctr_info *info) 168 { 169 int rc = -EINVAL; 170 171 asm volatile ( 172 "0: qctri %1\n" 173 "1: lhi %0,0\n" 174 "2:\n" 175 EX_TABLE(1b, 2b) 176 : "+d" (rc), "=Q" (*info)); 177 return rc; 178 } 179 180 /* Load CPU-counter-set controls */ 181 static inline int lcctl(u64 ctl) 182 { 183 int cc; 184 185 asm volatile ( 186 " lcctl %1\n" 187 " ipm %0\n" 188 " srl %0,28\n" 189 : "=d" (cc) : "Q" (ctl) : "cc"); 190 return cc; 191 } 192 193 /* Extract CPU counter */ 194 static inline int __ecctr(u64 ctr, u64 *content) 195 { 196 u64 _content; 197 int cc; 198 199 asm volatile ( 200 " ecctr %0,%2\n" 201 " ipm %1\n" 202 " srl %1,28\n" 203 : "=d" (_content), "=d" (cc) : "d" (ctr) : "cc"); 204 *content = _content; 205 return cc; 206 } 207 208 /* Extract CPU counter */ 209 static inline int ecctr(u64 ctr, u64 *val) 210 { 211 u64 content; 212 int cc; 213 214 cc = __ecctr(ctr, &content); 215 if (!cc) 216 *val = content; 217 return cc; 218 } 219 220 /* Store CPU counter multiple for a particular counter set */ 221 enum stcctm_ctr_set { 222 EXTENDED = 0, 223 BASIC = 1, 224 PROBLEM_STATE = 2, 225 CRYPTO_ACTIVITY = 3, 226 MT_DIAG = 5, 227 MT_DIAG_CLEARING = 9, /* clears loss-of-MT-ctr-data alert */ 228 }; 229 230 static __always_inline int stcctm(enum stcctm_ctr_set set, u64 range, u64 *dest) 231 { 232 int cc; 233 234 asm volatile ( 235 " STCCTM %2,%3,%1\n" 236 " ipm %0\n" 237 " srl %0,28\n" 238 : "=d" (cc) 239 : "Q" (*dest), "d" (range), "i" (set) 240 : "cc", "memory"); 241 return cc; 242 } 243 244 /* Query sampling information */ 245 static inline int qsi(struct hws_qsi_info_block *info) 246 { 247 int cc = 1; 248 249 asm volatile( 250 "0: qsi %1\n" 251 "1: lhi %0,0\n" 252 "2:\n" 253 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b) 254 : "+d" (cc), "+Q" (*info)); 255 return cc ? -EINVAL : 0; 256 } 257 258 /* Load sampling controls */ 259 static inline int lsctl(struct hws_lsctl_request_block *req) 260 { 261 int cc; 262 263 cc = 1; 264 asm volatile( 265 "0: lsctl 0(%1)\n" 266 "1: ipm %0\n" 267 " srl %0,28\n" 268 "2:\n" 269 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b) 270 : "+d" (cc), "+a" (req) 271 : "m" (*req) 272 : "cc", "memory"); 273 274 return cc ? -EINVAL : 0; 275 } 276 277 /* Sampling control helper functions */ 278 279 #include <linux/time.h> 280 281 static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi, 282 unsigned long freq) 283 { 284 return (USEC_PER_SEC / freq) * qsi->cpu_speed; 285 } 286 287 static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi, 288 unsigned long rate) 289 { 290 return USEC_PER_SEC * qsi->cpu_speed / rate; 291 } 292 293 #define SDB_TE_ALERT_REQ_MASK 0x4000000000000000UL 294 #define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL 295 296 /* Return TOD timestamp contained in an trailer entry */ 297 static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te) 298 { 299 /* TOD in STCKE format */ 300 if (te->t) 301 return *((unsigned long long *) &te->timestamp[1]); 302 303 /* TOD in STCK format */ 304 return *((unsigned long long *) &te->timestamp[0]); 305 } 306 307 /* Return pointer to trailer entry of an sample data block */ 308 static inline unsigned long *trailer_entry_ptr(unsigned long v) 309 { 310 void *ret; 311 312 ret = (void *) v; 313 ret += PAGE_SIZE; 314 ret -= sizeof(struct hws_trailer_entry); 315 316 return (unsigned long *) ret; 317 } 318 319 /* Return true if the entry in the sample data block table (sdbt) 320 * is a link to the next sdbt */ 321 static inline int is_link_entry(unsigned long *s) 322 { 323 return *s & 0x1ul ? 1 : 0; 324 } 325 326 /* Return pointer to the linked sdbt */ 327 static inline unsigned long *get_next_sdbt(unsigned long *s) 328 { 329 return (unsigned long *) (*s & ~0x1ul); 330 } 331 #endif /* _ASM_S390_CPU_MF_H */ 332