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 <linux/kmsan-checks.h> 14 #include <asm/asm-extable.h> 15 #include <asm/facility.h> 16 #include <asm/asm.h> 17 18 asm(".include \"asm/cpu_mf-insn.h\"\n"); 19 20 #define CPU_MF_INT_SF_IAE (1 << 31) /* invalid entry address */ 21 #define CPU_MF_INT_SF_ISE (1 << 30) /* incorrect SDBT entry */ 22 #define CPU_MF_INT_SF_PRA (1 << 29) /* program request alert */ 23 #define CPU_MF_INT_SF_SACA (1 << 23) /* sampler auth. change alert */ 24 #define CPU_MF_INT_SF_LSDA (1 << 22) /* loss of sample data alert */ 25 #define CPU_MF_INT_CF_MTDA (1 << 15) /* loss of MT ctr. data alert */ 26 #define CPU_MF_INT_CF_CACA (1 << 7) /* counter auth. change alert */ 27 #define CPU_MF_INT_CF_LCDA (1 << 6) /* loss of counter data alert */ 28 #define CPU_MF_INT_CF_MASK (CPU_MF_INT_CF_MTDA|CPU_MF_INT_CF_CACA| \ 29 CPU_MF_INT_CF_LCDA) 30 #define CPU_MF_INT_SF_MASK (CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE| \ 31 CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA| \ 32 CPU_MF_INT_SF_LSDA) 33 34 #define CPU_MF_SF_RIBM_NOTAV 0x1 /* Sampling unavailable */ 35 36 /* CPU measurement facility support */ 37 static inline int cpum_cf_avail(void) 38 { 39 return test_facility(40) && test_facility(67); 40 } 41 42 static inline int cpum_sf_avail(void) 43 { 44 return test_facility(40) && test_facility(68); 45 } 46 47 struct cpumf_ctr_info { 48 u16 cfvn; 49 u16 auth_ctl; 50 u16 enable_ctl; 51 u16 act_ctl; 52 u16 max_cpu; 53 u16 csvn; 54 u16 max_cg; 55 u16 reserved1; 56 u32 reserved2[12]; 57 } __packed; 58 59 /* QUERY SAMPLING INFORMATION block */ 60 struct hws_qsi_info_block { /* Bit(s) */ 61 unsigned int b0_13:14; /* 0-13: zeros */ 62 unsigned int as:1; /* 14: basic-sampling authorization */ 63 unsigned int ad:1; /* 15: diag-sampling authorization */ 64 unsigned int b16_21:6; /* 16-21: zeros */ 65 unsigned int es:1; /* 22: basic-sampling enable control */ 66 unsigned int ed:1; /* 23: diag-sampling enable control */ 67 unsigned int b24_29:6; /* 24-29: zeros */ 68 unsigned int cs:1; /* 30: basic-sampling activation control */ 69 unsigned int cd:1; /* 31: diag-sampling activation control */ 70 unsigned int bsdes:16; /* 4-5: size of basic sampling entry */ 71 unsigned int dsdes:16; /* 6-7: size of diagnostic sampling entry */ 72 unsigned long min_sampl_rate; /* 8-15: minimum sampling interval */ 73 unsigned long max_sampl_rate; /* 16-23: maximum sampling interval*/ 74 unsigned long tear; /* 24-31: TEAR contents */ 75 unsigned long dear; /* 32-39: DEAR contents */ 76 unsigned int rsvrd0:24; /* 40-42: reserved */ 77 unsigned int ribm:8; /* 43: Reserved by IBM */ 78 unsigned int cpu_speed; /* 44-47: CPU speed */ 79 unsigned long long rsvrd1; /* 48-55: reserved */ 80 unsigned long long rsvrd2; /* 56-63: reserved */ 81 } __packed; 82 83 /* SET SAMPLING CONTROLS request block */ 84 struct hws_lsctl_request_block { 85 unsigned int s:1; /* 0: maximum buffer indicator */ 86 unsigned int h:1; /* 1: part. level reserved for VM use*/ 87 unsigned long long b2_53:52;/* 2-53: zeros */ 88 unsigned int es:1; /* 54: basic-sampling enable control */ 89 unsigned int ed:1; /* 55: diag-sampling enable control */ 90 unsigned int b56_61:6; /* 56-61: - zeros */ 91 unsigned int cs:1; /* 62: basic-sampling activation control */ 92 unsigned int cd:1; /* 63: diag-sampling activation control */ 93 unsigned long interval; /* 8-15: sampling interval */ 94 unsigned long tear; /* 16-23: TEAR contents */ 95 unsigned long dear; /* 24-31: DEAR contents */ 96 /* 32-63: */ 97 unsigned long rsvrd1; /* reserved */ 98 unsigned long rsvrd2; /* reserved */ 99 unsigned long rsvrd3; /* reserved */ 100 unsigned long rsvrd4; /* reserved */ 101 } __packed; 102 103 struct hws_basic_entry { 104 unsigned int def:16; /* 0-15 Data Entry Format */ 105 unsigned int R:4; /* 16-19 reserved */ 106 unsigned int U:4; /* 20-23 Number of unique instruct. */ 107 unsigned int z:2; /* zeros */ 108 unsigned int T:1; /* 26 PSW DAT mode */ 109 unsigned int W:1; /* 27 PSW wait state */ 110 unsigned int P:1; /* 28 PSW Problem state */ 111 unsigned int AS:2; /* 29-30 PSW address-space control */ 112 unsigned int I:1; /* 31 entry valid or invalid */ 113 unsigned int CL:2; /* 32-33 Configuration Level */ 114 unsigned int H:1; /* 34 Host Indicator */ 115 unsigned int LS:1; /* 35 Limited Sampling */ 116 unsigned int:12; 117 unsigned int prim_asn:16; /* primary ASN */ 118 unsigned long long ia; /* Instruction Address */ 119 unsigned long long gpp; /* Guest Program Parameter */ 120 unsigned long long hpp; /* Host Program Parameter */ 121 } __packed; 122 123 struct hws_diag_entry { 124 unsigned int def:16; /* 0-15 Data Entry Format */ 125 unsigned int R:15; /* 16-19 and 20-30 reserved */ 126 unsigned int I:1; /* 31 entry valid or invalid */ 127 u8 data[]; /* Machine-dependent sample data */ 128 } __packed; 129 130 struct hws_combined_entry { 131 struct hws_basic_entry basic; /* Basic-sampling data entry */ 132 struct hws_diag_entry diag; /* Diagnostic-sampling data entry */ 133 } __packed; 134 135 union hws_trailer_header { 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 unsigned long long overflow; /* 64 - Overflow Count */ 144 }; 145 u128 val; 146 }; 147 148 struct hws_trailer_entry { 149 union hws_trailer_header header; /* 0 - 15 Flags + Overflow Count */ 150 unsigned char timestamp[16]; /* 16 - 31 timestamp */ 151 unsigned long long reserved1; /* 32 -Reserved */ 152 unsigned long long reserved2; /* */ 153 union { /* 48 - reserved for programming use */ 154 struct { 155 unsigned int clock_base:1; /* in progusage2 */ 156 unsigned long long progusage1:63; 157 unsigned long long progusage2; 158 }; 159 unsigned long long progusage[2]; 160 }; 161 } __packed; 162 163 /* Load program parameter */ 164 static inline void lpp(void *pp) 165 { 166 asm volatile("lpp 0(%0)\n" :: "a" (pp) : "memory"); 167 } 168 169 /* Query counter information */ 170 static inline int qctri(struct cpumf_ctr_info *info) 171 { 172 int rc = -EINVAL; 173 174 asm volatile ( 175 "0: qctri %1\n" 176 "1: lhi %0,0\n" 177 "2:\n" 178 EX_TABLE(1b, 2b) 179 : "+d" (rc), "=Q" (*info)); 180 return rc; 181 } 182 183 /* Load CPU-counter-set controls */ 184 static inline int lcctl(u64 ctl) 185 { 186 int cc; 187 188 asm volatile ( 189 " lcctl %[ctl]\n" 190 CC_IPM(cc) 191 : CC_OUT(cc, cc) 192 : [ctl] "Q" (ctl) 193 : CC_CLOBBER); 194 return CC_TRANSFORM(cc); 195 } 196 197 /* Extract CPU counter */ 198 static inline int __ecctr(u64 ctr, u64 *content) 199 { 200 u64 _content; 201 int cc; 202 203 asm volatile ( 204 " ecctr %[_content],%[ctr]\n" 205 CC_IPM(cc) 206 : CC_OUT(cc, cc), [_content] "=d" (_content) 207 : [ctr] "d" (ctr) 208 : CC_CLOBBER); 209 *content = _content; 210 return CC_TRANSFORM(cc); 211 } 212 213 /* Extract CPU counter */ 214 static inline int ecctr(u64 ctr, u64 *val) 215 { 216 u64 content; 217 int cc; 218 219 cc = __ecctr(ctr, &content); 220 if (!cc) 221 *val = content; 222 return cc; 223 } 224 225 /* Store CPU counter multiple for a particular counter set */ 226 enum stcctm_ctr_set { 227 EXTENDED = 0, 228 BASIC = 1, 229 PROBLEM_STATE = 2, 230 CRYPTO_ACTIVITY = 3, 231 MT_DIAG = 5, 232 MT_DIAG_CLEARING = 9, /* clears loss-of-MT-ctr-data alert */ 233 }; 234 235 static __always_inline int stcctm(enum stcctm_ctr_set set, u64 range, u64 *dest) 236 { 237 int cc; 238 239 asm volatile ( 240 " STCCTM %[range],%[set],%[dest]\n" 241 CC_IPM(cc) 242 : CC_OUT(cc, cc) 243 : [dest] "Q" (*dest), [range] "d" (range), [set] "i" (set) 244 : CC_CLOBBER_LIST("memory")); 245 /* 246 * If cc == 2, less than RANGE counters are stored, but it's not easy 247 * to tell how many. Always unpoison the whole range for simplicity. 248 */ 249 kmsan_unpoison_memory(dest, range * sizeof(u64)); 250 return CC_TRANSFORM(cc); 251 } 252 253 /* Query sampling information */ 254 static inline int qsi(struct hws_qsi_info_block *info) 255 { 256 int cc = 1; 257 258 asm volatile( 259 "0: qsi %1\n" 260 "1: lhi %0,0\n" 261 "2:\n" 262 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b) 263 : "+d" (cc), "+Q" (*info)); 264 return cc ? -EINVAL : 0; 265 } 266 267 /* Load sampling controls */ 268 static inline int lsctl(struct hws_lsctl_request_block *req) 269 { 270 int cc, exception; 271 272 exception = 1; 273 asm volatile( 274 "0: lsctl %[req]\n" 275 "1: lhi %[exc],0\n" 276 "2:\n" 277 CC_IPM(cc) 278 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b) 279 : CC_OUT(cc, cc), [exc] "+d" (exception) 280 : [req] "Q" (*req) 281 : CC_CLOBBER); 282 if (exception || CC_TRANSFORM(cc)) 283 return -EINVAL; 284 return 0; 285 } 286 #endif /* _ASM_S390_CPU_MF_H */ 287