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_CF_MASK      (CPU_MF_INT_CF_CACA|CPU_MF_INT_CF_LCDA)
  26 #define CPU_MF_INT_SF_MASK      (CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE|   \
  27                                  CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA|  \
  28                                  CPU_MF_INT_SF_LSDA)
  29
  30 /* CPU measurement facility support */
  31 static inline int cpum_cf_avail(void)
  32 {
  33         return MACHINE_HAS_LPP && test_facility(67);
  34 }
  35
  36 static inline int cpum_sf_avail(void)
  37 {
  38         return MACHINE_HAS_LPP && test_facility(68);
  39 }
  40
  41
  42 struct cpumf_ctr_info {
  43         u16   cfvn;
  44         u16   auth_ctl;
  45         u16   enable_ctl;
  46         u16   act_ctl;
  47         u16   max_cpu;
  48         u16   csvn;
  49         u16   max_cg;
  50         u16   reserved1;
  51         u32   reserved2[12];
  52 } __packed;
  53
  54 /* QUERY SAMPLING INFORMATION block */
  55 struct hws_qsi_info_block {         /* Bit(s) */
  56         unsigned int b0_13:14;      /* 0-13: zeros                       */
  57         unsigned int as:1;          /* 14: basic-sampling authorization  */
  58         unsigned int ad:1;          /* 15: diag-sampling authorization   */
  59         unsigned int b16_21:6;      /* 16-21: zeros                      */
  60         unsigned int es:1;          /* 22: basic-sampling enable control */
  61         unsigned int ed:1;          /* 23: diag-sampling enable control  */
  62         unsigned int b24_29:6;      /* 24-29: zeros                      */
  63         unsigned int cs:1;          /* 30: basic-sampling activation control */
  64         unsigned int cd:1;          /* 31: diag-sampling activation control */
  65         unsigned int bsdes:16;      /* 4-5: size of basic sampling entry */
  66         unsigned int dsdes:16;      /* 6-7: size of diagnostic sampling entry */
  67         unsigned long min_sampl_rate; /* 8-15: minimum sampling interval */
  68         unsigned long max_sampl_rate; /* 16-23: maximum sampling interval*/
  69         unsigned long tear;         /* 24-31: TEAR contents              */
  70         unsigned long dear;         /* 32-39: DEAR contents              */
  71         unsigned int rsvrd0;        /* 40-43: reserved                   */
  72         unsigned int cpu_speed;     /* 44-47: CPU speed                  */
  73         unsigned long long rsvrd1;  /* 48-55: reserved                   */
  74         unsigned long long rsvrd2;  /* 56-63: reserved                   */
  75 } __packed;
  76
  77 /* SET SAMPLING CONTROLS request block */
  78 struct hws_lsctl_request_block {
  79         unsigned int s:1;           /* 0: maximum buffer indicator       */
  80         unsigned int h:1;           /* 1: part. level reserved for VM use*/
  81         unsigned long long b2_53:52;/* 2-53: zeros                       */
  82         unsigned int es:1;          /* 54: basic-sampling enable control */
  83         unsigned int ed:1;          /* 55: diag-sampling enable control  */
  84         unsigned int b56_61:6;      /* 56-61: - zeros                    */
  85         unsigned int cs:1;          /* 62: basic-sampling activation control */
  86         unsigned int cd:1;          /* 63: diag-sampling activation control  */
  87         unsigned long interval;     /* 8-15: sampling interval           */
  88         unsigned long tear;         /* 16-23: TEAR contents              */
  89         unsigned long dear;         /* 24-31: DEAR contents              */
  90         /* 32-63:                                                        */
  91         unsigned long rsvrd1;       /* reserved                          */
  92         unsigned long rsvrd2;       /* reserved                          */
  93         unsigned long rsvrd3;       /* reserved                          */
  94         unsigned long rsvrd4;       /* reserved                          */
  95 } __packed;
  96
  97 struct hws_basic_entry {
  98         unsigned int def:16;        /* 0-15  Data Entry Format           */
  99         unsigned int R:4;           /* 16-19 reserved                    */
 100         unsigned int U:4;           /* 20-23 Number of unique instruct.  */
 101         unsigned int z:2;           /* zeros                             */
 102         unsigned int T:1;           /* 26 PSW DAT mode                   */
 103         unsigned int W:1;           /* 27 PSW wait state                 */
 104         unsigned int P:1;           /* 28 PSW Problem state              */
 105         unsigned int AS:2;          /* 29-30 PSW address-space control   */
 106         unsigned int I:1;           /* 31 entry valid or invalid         */
 107         unsigned int:16;
 108         unsigned int prim_asn:16;   /* primary ASN                       */
 109         unsigned long long ia;      /* Instruction Address               */
 110         unsigned long long gpp;     /* Guest Program Parameter           */
 111         unsigned long long hpp;     /* Host Program Parameter            */
 112 } __packed;
 113
 114 struct hws_diag_entry {
 115         unsigned int def:16;        /* 0-15  Data Entry Format           */
 116         unsigned int R:14;          /* 16-19 and 20-30 reserved          */
 117         unsigned int I:1;           /* 31 entry valid or invalid         */
 118         u8           data[];        /* Machine-dependent sample data     */
 119 } __packed;
 120
 121 struct hws_combined_entry {
 122         struct hws_basic_entry  basic;  /* Basic-sampling data entry */
 123         struct hws_diag_entry   diag;   /* Diagnostic-sampling data entry */
 124 } __packed;
 125
 126 struct hws_trailer_entry {
 127         union {
 128                 struct {
 129                         unsigned int f:1;       /* 0 - Block Full Indicator   */
 130                         unsigned int a:1;       /* 1 - Alert request control  */
 131                         unsigned int t:1;       /* 2 - Timestamp format       */
 132                         unsigned long long:61;  /* 3 - 63: Reserved           */
 133                 };
 134                 unsigned long long flags;       /* 0 - 63: All indicators     */
 135         };
 136         unsigned long long overflow;     /* 64 - sample Overflow count        */
 137         unsigned char timestamp[16];     /* 16 - 31 timestamp                 */
 138         unsigned long long reserved1;    /* 32 -Reserved                      */
 139         unsigned long long reserved2;    /*                                   */
 140         unsigned long long progusage1;   /* 48 - reserved for programming use */
 141         unsigned long long progusage2;   /*                                   */
 142 } __packed;
 143
 144 /* Query counter information */
 145 static inline int qctri(struct cpumf_ctr_info *info)
 146 {
 147         int rc = -EINVAL;
 148
 149         asm volatile (
 150                 "0:     .insn   s,0xb28e0000,%1\n"
 151                 "1:     lhi     %0,0\n"
 152                 "2:\n"
 153                 EX_TABLE(1b, 2b)
 154                 : "+d" (rc), "=Q" (*info));
 155         return rc;
 156 }
 157
 158 /* Load CPU-counter-set controls */
 159 static inline int lcctl(u64 ctl)
 160 {
 161         int cc;
 162
 163         asm volatile (
 164                 "       .insn   s,0xb2840000,%1\n"
 165                 "       ipm     %0\n"
 166                 "       srl     %0,28\n"
 167                 : "=d" (cc) : "m" (ctl) : "cc");
 168         return cc;
 169 }
 170
 171 /* Extract CPU counter */
 172 static inline int ecctr(u64 ctr, u64 *val)
 173 {
 174         register u64 content asm("4") = 0;
 175         int cc;
 176
 177         asm volatile (
 178                 "       .insn   rre,0xb2e40000,%0,%2\n"
 179                 "       ipm     %1\n"
 180                 "       srl     %1,28\n"
 181                 : "=d" (content), "=d" (cc) : "d" (ctr) : "cc");
 182         if (!cc)
 183                 *val = content;
 184         return cc;
 185 }
 186
 187 /* Store CPU counter multiple for the MT utilization counter set */
 188 static inline int stcctm5(u64 num, u64 *val)
 189 {
 190         typedef struct { u64 _[num]; } addrtype;
 191         int cc;
 192
 193         asm volatile (
 194                 "       .insn   rsy,0xeb0000000017,%2,5,%1\n"
 195                 "       ipm     %0\n"
 196                 "       srl     %0,28\n"
 197                 : "=d" (cc), "=Q" (*(addrtype *) val)  : "d" (num) : "cc");
 198         return cc;
 199 }
 200
 201 /* Query sampling information */
 202 static inline int qsi(struct hws_qsi_info_block *info)
 203 {
 204         int cc;
 205         cc = 1;
 206
 207         asm volatile(
 208                 "0:     .insn   s,0xb2860000,0(%1)\n"
 209                 "1:     lhi     %0,0\n"
 210                 "2:\n"
 211                 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
 212                 : "=d" (cc), "+a" (info)
 213                 : "m" (*info)
 214                 : "cc", "memory");
 215
 216         return cc ? -EINVAL : 0;
 217 }
 218
 219 /* Load sampling controls */
 220 static inline int lsctl(struct hws_lsctl_request_block *req)
 221 {
 222         int cc;
 223
 224         cc = 1;
 225         asm volatile(
 226                 "0:     .insn   s,0xb2870000,0(%1)\n"
 227                 "1:     ipm     %0\n"
 228                 "       srl     %0,28\n"
 229                 "2:\n"
 230                 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
 231                 : "+d" (cc), "+a" (req)
 232                 : "m" (*req)
 233                 : "cc", "memory");
 234
 235         return cc ? -EINVAL : 0;
 236 }
 237
 238 /* Sampling control helper functions */
 239
 240 #include <linux/time.h>
 241
 242 static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi,
 243                                                 unsigned long freq)
 244 {
 245         return (USEC_PER_SEC / freq) * qsi->cpu_speed;
 246 }
 247
 248 static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi,
 249                                                 unsigned long rate)
 250 {
 251         return USEC_PER_SEC * qsi->cpu_speed / rate;
 252 }
 253
 254 #define SDB_TE_ALERT_REQ_MASK   0x4000000000000000UL
 255 #define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL
 256
 257 /* Return TOD timestamp contained in an trailer entry */
 258 static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te)
 259 {
 260         /* TOD in STCKE format */
 261         if (te->t)
 262                 return *((unsigned long long *) &te->timestamp[1]);
 263
 264         /* TOD in STCK format */
 265         return *((unsigned long long *) &te->timestamp[0]);
 266 }
 267
 268 /* Return pointer to trailer entry of an sample data block */
 269 static inline unsigned long *trailer_entry_ptr(unsigned long v)
 270 {
 271         void *ret;
 272
 273         ret = (void *) v;
 274         ret += PAGE_SIZE;
 275         ret -= sizeof(struct hws_trailer_entry);
 276
 277         return (unsigned long *) ret;
 278 }
 279
 280 /* Return if the entry in the sample data block table (sdbt)
 281  * is a link to the next sdbt */
 282 static inline int is_link_entry(unsigned long *s)
 283 {
 284         return *s & 0x1ul ? 1 : 0;
 285 }
 286
 287 /* Return pointer to the linked sdbt */
 288 static inline unsigned long *get_next_sdbt(unsigned long *s)
 289 {
 290         return (unsigned long *) (*s & ~0x1ul);
 291 }
 292 #endif /* _ASM_S390_CPU_MF_H */