arch/s390/include/asm/cpu_mf.h

   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/facility.h>
  14
  15 asm(".include \"asm/cpu_mf-insn.h\"\n");
  16
  17 #define CPU_MF_INT_SF_IAE       (1 << 31)       /* invalid entry address */
  18 #define CPU_MF_INT_SF_ISE       (1 << 30)       /* incorrect SDBT entry */
  19 #define CPU_MF_INT_SF_PRA       (1 << 29)       /* program request alert */
  20 #define CPU_MF_INT_SF_SACA      (1 << 23)       /* sampler auth. change alert */
  21 #define CPU_MF_INT_SF_LSDA      (1 << 22)       /* loss of sample data alert */
  22 #define CPU_MF_INT_CF_MTDA      (1 << 15)       /* loss of MT ctr. 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_MTDA|CPU_MF_INT_CF_CACA| \
  26                                  CPU_MF_INT_CF_LCDA)
  27 #define CPU_MF_INT_SF_MASK      (CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE|   \
  28                                  CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA|  \
  29                                  CPU_MF_INT_SF_LSDA)
  30
  31 /* CPU measurement facility support */
  32 static inline int cpum_cf_avail(void)
  33 {
  34         return test_facility(40) && test_facility(67);
  35 }
  36
  37 static inline int cpum_sf_avail(void)
  38 {
  39         return test_facility(40) && test_facility(68);
  40 }
  41
  42
  43 struct cpumf_ctr_info {
  44         u16   cfvn;
  45         u16   auth_ctl;
  46         u16   enable_ctl;
  47         u16   act_ctl;
  48         u16   max_cpu;
  49         u16   csvn;
  50         u16   max_cg;
  51         u16   reserved1;
  52         u32   reserved2[12];
  53 } __packed;
  54
  55 /* QUERY SAMPLING INFORMATION block */
  56 struct hws_qsi_info_block {         /* Bit(s) */
  57         unsigned int b0_13:14;      /* 0-13: zeros                       */
  58         unsigned int as:1;          /* 14: basic-sampling authorization  */
  59         unsigned int ad:1;          /* 15: diag-sampling authorization   */
  60         unsigned int b16_21:6;      /* 16-21: zeros                      */
  61         unsigned int es:1;          /* 22: basic-sampling enable control */
  62         unsigned int ed:1;          /* 23: diag-sampling enable control  */
  63         unsigned int b24_29:6;      /* 24-29: zeros                      */
  64         unsigned int cs:1;          /* 30: basic-sampling activation control */
  65         unsigned int cd:1;          /* 31: diag-sampling activation control */
  66         unsigned int bsdes:16;      /* 4-5: size of basic sampling entry */
  67         unsigned int dsdes:16;      /* 6-7: size of diagnostic sampling entry */
  68         unsigned long min_sampl_rate; /* 8-15: minimum sampling interval */
  69         unsigned long max_sampl_rate; /* 16-23: maximum sampling interval*/
  70         unsigned long tear;         /* 24-31: TEAR contents              */
  71         unsigned long dear;         /* 32-39: DEAR contents              */
  72         unsigned int rsvrd0;        /* 40-43: reserved                   */
  73         unsigned int cpu_speed;     /* 44-47: CPU speed                  */
  74         unsigned long long rsvrd1;  /* 48-55: reserved                   */
  75         unsigned long long rsvrd2;  /* 56-63: reserved                   */
  76 } __packed;
  77
  78 /* SET SAMPLING CONTROLS request block */
  79 struct hws_lsctl_request_block {
  80         unsigned int s:1;           /* 0: maximum buffer indicator       */
  81         unsigned int h:1;           /* 1: part. level reserved for VM use*/
  82         unsigned long long b2_53:52;/* 2-53: zeros                       */
  83         unsigned int es:1;          /* 54: basic-sampling enable control */
  84         unsigned int ed:1;          /* 55: diag-sampling enable control  */
  85         unsigned int b56_61:6;      /* 56-61: - zeros                    */
  86         unsigned int cs:1;          /* 62: basic-sampling activation control */
  87         unsigned int cd:1;          /* 63: diag-sampling activation control  */
  88         unsigned long interval;     /* 8-15: sampling interval           */
  89         unsigned long tear;         /* 16-23: TEAR contents              */
  90         unsigned long dear;         /* 24-31: DEAR contents              */
  91         /* 32-63:                                                        */
  92         unsigned long rsvrd1;       /* reserved                          */
  93         unsigned long rsvrd2;       /* reserved                          */
  94         unsigned long rsvrd3;       /* reserved                          */
  95         unsigned long rsvrd4;       /* reserved                          */
  96 } __packed;
  97
  98 struct hws_basic_entry {
  99         unsigned int def:16;        /* 0-15  Data Entry Format           */
 100         unsigned int R:4;           /* 16-19 reserved                    */
 101         unsigned int U:4;           /* 20-23 Number of unique instruct.  */
 102         unsigned int z:2;           /* zeros                             */
 103         unsigned int T:1;           /* 26 PSW DAT mode                   */
 104         unsigned int W:1;           /* 27 PSW wait state                 */
 105         unsigned int P:1;           /* 28 PSW Problem state              */
 106         unsigned int AS:2;          /* 29-30 PSW address-space control   */
 107         unsigned int I:1;           /* 31 entry valid or invalid         */
 108         unsigned int CL:2;          /* 32-33 Configuration Level         */
 109         unsigned int:14;
 110         unsigned int prim_asn:16;   /* primary ASN                       */
 111         unsigned long long ia;      /* Instruction Address               */
 112         unsigned long long gpp;     /* Guest Program Parameter           */
 113         unsigned long long hpp;     /* Host Program Parameter            */
 114 } __packed;
 115
 116 struct hws_diag_entry {
 117         unsigned int def:16;        /* 0-15  Data Entry Format           */
 118         unsigned int R:15;          /* 16-19 and 20-30 reserved          */
 119         unsigned int I:1;           /* 31 entry valid or invalid         */
 120         u8           data[];        /* Machine-dependent sample data     */
 121 } __packed;
 122
 123 struct hws_combined_entry {
 124         struct hws_basic_entry  basic;  /* Basic-sampling data entry */
 125         struct hws_diag_entry   diag;   /* Diagnostic-sampling data entry */
 126 } __packed;
 127
 128 struct hws_trailer_entry {
 129         union {
 130                 struct {
 131                         unsigned int f:1;       /* 0 - Block Full Indicator   */
 132                         unsigned int a:1;       /* 1 - Alert request control  */
 133                         unsigned int t:1;       /* 2 - Timestamp format       */
 134                         unsigned int :29;       /* 3 - 31: Reserved           */
 135                         unsigned int bsdes:16;  /* 32-47: size of basic SDE   */
 136                         unsigned int dsdes:16;  /* 48-63: size of diagnostic SDE */
 137                 };
 138                 unsigned long long flags;       /* 0 - 63: All indicators     */
 139         };
 140         unsigned long long overflow;     /* 64 - sample Overflow count        */
 141         unsigned char timestamp[16];     /* 16 - 31 timestamp                 */
 142         unsigned long long reserved1;    /* 32 -Reserved                      */
 143         unsigned long long reserved2;    /*                                   */
 144         union {                          /* 48 - reserved for programming use */
 145                 struct {
 146                         unsigned int clock_base:1; /* in progusage2 */
 147                         unsigned long long progusage1:63;
 148                         unsigned long long progusage2;
 149                 };
 150                 unsigned long long progusage[2];
 151         };
 152 } __packed;
 153
 154 /* Load program parameter */
 155 static inline void lpp(void *pp)
 156 {
 157         asm volatile(".insn s,0xb2800000,0(%0)\n":: "a" (pp) : "memory");
 158 }
 159
 160 /* Query counter information */
 161 static inline int qctri(struct cpumf_ctr_info *info)
 162 {
 163         int rc = -EINVAL;
 164
 165         asm volatile (
 166                 "0:     .insn   s,0xb28e0000,%1\n"
 167                 "1:     lhi     %0,0\n"
 168                 "2:\n"
 169                 EX_TABLE(1b, 2b)
 170                 : "+d" (rc), "=Q" (*info));
 171         return rc;
 172 }
 173
 174 /* Load CPU-counter-set controls */
 175 static inline int lcctl(u64 ctl)
 176 {
 177         int cc;
 178
 179         asm volatile (
 180                 "       .insn   s,0xb2840000,%1\n"
 181                 "       ipm     %0\n"
 182                 "       srl     %0,28\n"
 183                 : "=d" (cc) : "Q" (ctl) : "cc");
 184         return cc;
 185 }
 186
 187 /* Extract CPU counter */
 188 static inline int __ecctr(u64 ctr, u64 *content)
 189 {
 190         u64 _content;
 191         int cc;
 192
 193         asm volatile (
 194                 "       .insn   rre,0xb2e40000,%0,%2\n"
 195                 "       ipm     %1\n"
 196                 "       srl     %1,28\n"
 197                 : "=d" (_content), "=d" (cc) : "d" (ctr) : "cc");
 198         *content = _content;
 199         return cc;
 200 }
 201
 202 /* Extract CPU counter */
 203 static inline int ecctr(u64 ctr, u64 *val)
 204 {
 205         u64 content;
 206         int cc;
 207
 208         cc = __ecctr(ctr, &content);
 209         if (!cc)
 210                 *val = content;
 211         return cc;
 212 }
 213
 214 /* Store CPU counter multiple for a particular counter set */
 215 enum stcctm_ctr_set {
 216         EXTENDED = 0,
 217         BASIC = 1,
 218         PROBLEM_STATE = 2,
 219         CRYPTO_ACTIVITY = 3,
 220         MT_DIAG = 5,
 221         MT_DIAG_CLEARING = 9,   /* clears loss-of-MT-ctr-data alert */
 222 };
 223 static inline int stcctm(enum stcctm_ctr_set set, u64 range, u64 *dest)
 224 {
 225         int cc;
 226
 227         asm volatile (
 228                 "       STCCTM  %2,%3,%1\n"
 229                 "       ipm     %0\n"
 230                 "       srl     %0,28\n"
 231                 : "=d" (cc)
 232                 : "Q" (*dest), "d" (range), "i" (set)
 233                 : "cc", "memory");
 234         return cc;
 235 }
 236
 237 /* Query sampling information */
 238 static inline int qsi(struct hws_qsi_info_block *info)
 239 {
 240         int cc = 1;
 241
 242         asm volatile(
 243                 "0:     .insn   s,0xb2860000,%1\n"
 244                 "1:     lhi     %0,0\n"
 245                 "2:\n"
 246                 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
 247                 : "+d" (cc), "+Q" (*info));
 248         return cc ? -EINVAL : 0;
 249 }
 250
 251 /* Load sampling controls */
 252 static inline int lsctl(struct hws_lsctl_request_block *req)
 253 {
 254         int cc;
 255
 256         cc = 1;
 257         asm volatile(
 258                 "0:     .insn   s,0xb2870000,0(%1)\n"
 259                 "1:     ipm     %0\n"
 260                 "       srl     %0,28\n"
 261                 "2:\n"
 262                 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
 263                 : "+d" (cc), "+a" (req)
 264                 : "m" (*req)
 265                 : "cc", "memory");
 266
 267         return cc ? -EINVAL : 0;
 268 }
 269
 270 /* Sampling control helper functions */
 271
 272 #include <linux/time.h>
 273
 274 static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi,
 275                                                 unsigned long freq)
 276 {
 277         return (USEC_PER_SEC / freq) * qsi->cpu_speed;
 278 }
 279
 280 static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi,
 281                                                 unsigned long rate)
 282 {
 283         return USEC_PER_SEC * qsi->cpu_speed / rate;
 284 }
 285
 286 #define SDB_TE_ALERT_REQ_MASK   0x4000000000000000UL
 287 #define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL
 288
 289 /* Return TOD timestamp contained in an trailer entry */
 290 static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te)
 291 {
 292         /* TOD in STCKE format */
 293         if (te->t)
 294                 return *((unsigned long long *) &te->timestamp[1]);
 295
 296         /* TOD in STCK format */
 297         return *((unsigned long long *) &te->timestamp[0]);
 298 }
 299
 300 /* Return pointer to trailer entry of an sample data block */
 301 static inline unsigned long *trailer_entry_ptr(unsigned long v)
 302 {
 303         void *ret;
 304
 305         ret = (void *) v;
 306         ret += PAGE_SIZE;
 307         ret -= sizeof(struct hws_trailer_entry);
 308
 309         return (unsigned long *) ret;
 310 }
 311
 312 /* Return if the entry in the sample data block table (sdbt)
 313  * is a link to the next sdbt */
 314 static inline int is_link_entry(unsigned long *s)
 315 {
 316         return *s & 0x1ul ? 1 : 0;
 317 }
 318
 319 /* Return pointer to the linked sdbt */
 320 static inline unsigned long *get_next_sdbt(unsigned long *s)
 321 {
 322         return (unsigned long *) (*s & ~0x1ul);
 323 }
 324 #endif /* _ASM_S390_CPU_MF_H */