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_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_RI_HALTED (1 << 5) /* run-time instr. halted */ 26#define CPU_MF_INT_RI_BUF_FULL (1 << 4) /* run-time instr. program 27 buffer full */ 28 29#define CPU_MF_INT_CF_MASK (CPU_MF_INT_CF_CACA|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#define CPU_MF_INT_RI_MASK (CPU_MF_INT_RI_HALTED|CPU_MF_INT_RI_BUF_FULL) 34 35/* CPU measurement facility support */ 36static inline int cpum_cf_avail(void) 37{ 38 return MACHINE_HAS_LPP && test_facility(67); 39} 40 41static inline int cpum_sf_avail(void) 42{ 43 return MACHINE_HAS_LPP && test_facility(68); 44} 45 46 47struct 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 */ 60struct 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; /* 40-43: reserved */ 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 */ 83struct 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 102struct 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:16; 113 unsigned int prim_asn:16; /* primary ASN */ 114 unsigned long long ia; /* Instruction Address */ 115 unsigned long long gpp; /* Guest Program Parameter */ 116 unsigned long long hpp; /* Host Program Parameter */ 117} __packed; 118 119struct hws_diag_entry { 120 unsigned int def:16; /* 0-15 Data Entry Format */ 121 unsigned int R:14; /* 16-19 and 20-30 reserved */ 122 unsigned int I:1; /* 31 entry valid or invalid */ 123 u8 data[]; /* Machine-dependent sample data */ 124} __packed; 125 126struct hws_combined_entry { 127 struct hws_basic_entry basic; /* Basic-sampling data entry */ 128 struct hws_diag_entry diag; /* Diagnostic-sampling data entry */ 129} __packed; 130 131struct hws_trailer_entry { 132 union { 133 struct { 134 unsigned int f:1; /* 0 - Block Full Indicator */ 135 unsigned int a:1; /* 1 - Alert request control */ 136 unsigned int t:1; /* 2 - Timestamp format */ 137 unsigned long long:61; /* 3 - 63: Reserved */ 138 }; 139 unsigned long long flags; /* 0 - 63: All indicators */ 140 }; 141 unsigned long long overflow; /* 64 - sample Overflow count */ 142 unsigned char timestamp[16]; /* 16 - 31 timestamp */ 143 unsigned long long reserved1; /* 32 -Reserved */ 144 unsigned long long reserved2; /* */ 145 unsigned long long progusage1; /* 48 - reserved for programming use */ 146 unsigned long long progusage2; /* */ 147} __packed; 148 149/* Query counter information */ 150static inline int qctri(struct cpumf_ctr_info *info) 151{ 152 int rc = -EINVAL; 153 154 asm volatile ( 155 "0: .insn s,0xb28e0000,%1\n" 156 "1: lhi %0,0\n" 157 "2:\n" 158 EX_TABLE(1b, 2b) 159 : "+d" (rc), "=Q" (*info)); 160 return rc; 161} 162 163/* Load CPU-counter-set controls */ 164static inline int lcctl(u64 ctl) 165{ 166 int cc; 167 168 asm volatile ( 169 " .insn s,0xb2840000,%1\n" 170 " ipm %0\n" 171 " srl %0,28\n" 172 : "=d" (cc) : "m" (ctl) : "cc"); 173 return cc; 174} 175 176/* Extract CPU counter */ 177static inline int ecctr(u64 ctr, u64 *val) 178{ 179 register u64 content asm("4") = 0; 180 int cc; 181 182 asm volatile ( 183 " .insn rre,0xb2e40000,%0,%2\n" 184 " ipm %1\n" 185 " srl %1,28\n" 186 : "=d" (content), "=d" (cc) : "d" (ctr) : "cc"); 187 if (!cc) 188 *val = content; 189 return cc; 190} 191 192/* Query sampling information */ 193static inline int qsi(struct hws_qsi_info_block *info) 194{ 195 int cc; 196 cc = 1; 197 198 asm volatile( 199 "0: .insn s,0xb2860000,0(%1)\n" 200 "1: lhi %0,0\n" 201 "2:\n" 202 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b) 203 : "=d" (cc), "+a" (info) 204 : "m" (*info) 205 : "cc", "memory"); 206 207 return cc ? -EINVAL : 0; 208} 209 210/* Load sampling controls */ 211static inline int lsctl(struct hws_lsctl_request_block *req) 212{ 213 int cc; 214 215 cc = 1; 216 asm volatile( 217 "0: .insn s,0xb2870000,0(%1)\n" 218 "1: ipm %0\n" 219 " srl %0,28\n" 220 "2:\n" 221 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b) 222 : "+d" (cc), "+a" (req) 223 : "m" (*req) 224 : "cc", "memory"); 225 226 return cc ? -EINVAL : 0; 227} 228 229/* Sampling control helper functions */ 230 231#include <linux/time.h> 232 233static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi, 234 unsigned long freq) 235{ 236 return (USEC_PER_SEC / freq) * qsi->cpu_speed; 237} 238 239static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi, 240 unsigned long rate) 241{ 242 return USEC_PER_SEC * qsi->cpu_speed / rate; 243} 244 245#define SDB_TE_ALERT_REQ_MASK 0x4000000000000000UL 246#define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL 247 248/* Return TOD timestamp contained in an trailer entry */ 249static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te) 250{ 251 /* TOD in STCKE format */ 252 if (te->t) 253 return *((unsigned long long *) &te->timestamp[1]); 254 255 /* TOD in STCK format */ 256 return *((unsigned long long *) &te->timestamp[0]); 257} 258 259/* Return pointer to trailer entry of an sample data block */ 260static inline unsigned long *trailer_entry_ptr(unsigned long v) 261{ 262 void *ret; 263 264 ret = (void *) v; 265 ret += PAGE_SIZE; 266 ret -= sizeof(struct hws_trailer_entry); 267 268 return (unsigned long *) ret; 269} 270 271/* Return if the entry in the sample data block table (sdbt) 272 * is a link to the next sdbt */ 273static inline int is_link_entry(unsigned long *s) 274{ 275 return *s & 0x1ul ? 1 : 0; 276} 277 278/* Return pointer to the linked sdbt */ 279static inline unsigned long *get_next_sdbt(unsigned long *s) 280{ 281 return (unsigned long *) (*s & ~0x1ul); 282} 283#endif /* _ASM_S390_CPU_MF_H */ 284