arch/s390/include/asm/cpu_mf.h

   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 */
  36 static inline int cpum_cf_avail(void)
  37 {
  38         return MACHINE_HAS_LPP && test_facility(67);
  39 }
  40
  41 static inline int cpum_sf_avail(void)
  42 {
  43         return MACHINE_HAS_LPP && test_facility(68);
  44 }
  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;        /* 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 */
  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: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
 119 struct 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
 126 struct 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
 131 struct 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 */
 150 static 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 */
 164 static 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 */
 177 static 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 /* Store CPU counter multiple for the MT utilization counter set */
 193 static inline int stcctm5(u64 num, u64 *val)
 194 {
 195         typedef struct { u64 _[num]; } addrtype;
 196         int cc;
 197
 198         asm volatile (
 199                 "       .insn   rsy,0xeb0000000017,%2,5,%1\n"
 200                 "       ipm     %0\n"
 201                 "       srl     %0,28\n"
 202                 : "=d" (cc), "=Q" (*(addrtype *) val)  : "d" (num) : "cc");
 203         return cc;
 204 }
 205
 206 /* Query sampling information */
 207 static inline int qsi(struct hws_qsi_info_block *info)
 208 {
 209         int cc;
 210         cc = 1;
 211
 212         asm volatile(
 213                 "0:     .insn   s,0xb2860000,0(%1)\n"
 214                 "1:     lhi     %0,0\n"
 215                 "2:\n"
 216                 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
 217                 : "=d" (cc), "+a" (info)
 218                 : "m" (*info)
 219                 : "cc", "memory");
 220
 221         return cc ? -EINVAL : 0;
 222 }
 223
 224 /* Load sampling controls */
 225 static inline int lsctl(struct hws_lsctl_request_block *req)
 226 {
 227         int cc;
 228
 229         cc = 1;
 230         asm volatile(
 231                 "0:     .insn   s,0xb2870000,0(%1)\n"
 232                 "1:     ipm     %0\n"
 233                 "       srl     %0,28\n"
 234                 "2:\n"
 235                 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
 236                 : "+d" (cc), "+a" (req)
 237                 : "m" (*req)
 238                 : "cc", "memory");
 239
 240         return cc ? -EINVAL : 0;
 241 }
 242
 243 /* Sampling control helper functions */
 244
 245 #include <linux/time.h>
 246
 247 static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi,
 248                                                 unsigned long freq)
 249 {
 250         return (USEC_PER_SEC / freq) * qsi->cpu_speed;
 251 }
 252
 253 static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi,
 254                                                 unsigned long rate)
 255 {
 256         return USEC_PER_SEC * qsi->cpu_speed / rate;
 257 }
 258
 259 #define SDB_TE_ALERT_REQ_MASK   0x4000000000000000UL
 260 #define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL
 261
 262 /* Return TOD timestamp contained in an trailer entry */
 263 static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te)
 264 {
 265         /* TOD in STCKE format */
 266         if (te->t)
 267                 return *((unsigned long long *) &te->timestamp[1]);
 268
 269         /* TOD in STCK format */
 270         return *((unsigned long long *) &te->timestamp[0]);
 271 }
 272
 273 /* Return pointer to trailer entry of an sample data block */
 274 static inline unsigned long *trailer_entry_ptr(unsigned long v)
 275 {
 276         void *ret;
 277
 278         ret = (void *) v;
 279         ret += PAGE_SIZE;
 280         ret -= sizeof(struct hws_trailer_entry);
 281
 282         return (unsigned long *) ret;
 283 }
 284
 285 /* Return if the entry in the sample data block table (sdbt)
 286  * is a link to the next sdbt */
 287 static inline int is_link_entry(unsigned long *s)
 288 {
 289         return *s & 0x1ul ? 1 : 0;
 290 }
 291
 292 /* Return pointer to the linked sdbt */
 293 static inline unsigned long *get_next_sdbt(unsigned long *s)
 294 {
 295         return (unsigned long *) (*s & ~0x1ul);
 296 }
 297 #endif /* _ASM_S390_CPU_MF_H */