linux/arch/s390/include/asm/cpu_mf.h
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   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
  15asm(".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 */
  32static inline int cpum_cf_avail(void)
  33{
  34        return test_facility(40) && test_facility(67);
  35}
  36
  37static inline int cpum_sf_avail(void)
  38{
  39        return test_facility(40) && test_facility(68);
  40}
  41
  42
  43struct 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 */
  56struct 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 */
  79struct 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
  98struct 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
 116struct 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
 123struct 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
 128struct 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 */
 155static inline void lpp(void *pp)
 156{
 157        asm volatile(".insn s,0xb2800000,0(%0)\n":: "a" (pp) : "memory");
 158}
 159
 160/* Query counter information */
 161static 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 */
 175static 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 */
 188static 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 */
 203static 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 */
 215enum 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};
 223static 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 */
 238static 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 */
 252static 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
 274static 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
 280static 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 */
 290static 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 */
 301static 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 */
 314static inline int is_link_entry(unsigned long *s)
 315{
 316        return *s & 0x1ul ? 1 : 0;
 317}
 318
 319/* Return pointer to the linked sdbt */
 320static inline unsigned long *get_next_sdbt(unsigned long *s)
 321{
 322        return (unsigned long *) (*s & ~0x1ul);
 323}
 324#endif /* _ASM_S390_CPU_MF_H */
 325
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