LXR linux/arch/s390/include/asm/cpu

   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_MTDA      (1 << 15)       /* loss of MT ctr. data alert */
  24#define CPU_MF_INT_CF_CACA      (1 <<  7)       /* counter auth. change alert */
  25#define CPU_MF_INT_CF_LCDA      (1 <<  6)       /* loss of counter data alert */
  26#define CPU_MF_INT_CF_MASK      (CPU_MF_INT_CF_MTDA|CPU_MF_INT_CF_CACA| \
  27                                 CPU_MF_INT_CF_LCDA)
  28#define CPU_MF_INT_SF_MASK      (CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE|   \
  29                                 CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA|  \
  30                                 CPU_MF_INT_SF_LSDA)
  31
  32/* CPU measurement facility support */
  33static inline int cpum_cf_avail(void)
  34{
  35        return MACHINE_HAS_LPP && test_facility(67);
  36}
  37
  38static inline int cpum_sf_avail(void)
  39{
  40        return MACHINE_HAS_LPP && test_facility(68);
  41}
  42
  43
  44struct cpumf_ctr_info {
  45        u16   cfvn;
  46        u16   auth_ctl;
  47        u16   enable_ctl;
  48        u16   act_ctl;
  49        u16   max_cpu;
  50        u16   csvn;
  51        u16   max_cg;
  52        u16   reserved1;
  53        u32   reserved2[12];
  54} __packed;
  55
  56/* QUERY SAMPLING INFORMATION block */
  57struct hws_qsi_info_block {         /* Bit(s) */
  58        unsigned int b0_13:14;      /* 0-13: zeros                       */
  59        unsigned int as:1;          /* 14: basic-sampling authorization  */
  60        unsigned int ad:1;          /* 15: diag-sampling authorization   */
  61        unsigned int b16_21:6;      /* 16-21: zeros                      */
  62        unsigned int es:1;          /* 22: basic-sampling enable control */
  63        unsigned int ed:1;          /* 23: diag-sampling enable control  */
  64        unsigned int b24_29:6;      /* 24-29: zeros                      */
  65        unsigned int cs:1;          /* 30: basic-sampling activation control */
  66        unsigned int cd:1;          /* 31: diag-sampling activation control */
  67        unsigned int bsdes:16;      /* 4-5: size of basic sampling entry */
  68        unsigned int dsdes:16;      /* 6-7: size of diagnostic sampling entry */
  69        unsigned long min_sampl_rate; /* 8-15: minimum sampling interval */
  70        unsigned long max_sampl_rate; /* 16-23: maximum sampling interval*/
  71        unsigned long tear;         /* 24-31: TEAR contents              */
  72        unsigned long dear;         /* 32-39: DEAR contents              */
  73        unsigned int rsvrd0;        /* 40-43: reserved                   */
  74        unsigned int cpu_speed;     /* 44-47: CPU speed                  */
  75        unsigned long long rsvrd1;  /* 48-55: reserved                   */
  76        unsigned long long rsvrd2;  /* 56-63: reserved                   */
  77} __packed;
  78
  79/* SET SAMPLING CONTROLS request block */
  80struct hws_lsctl_request_block {
  81        unsigned int s:1;           /* 0: maximum buffer indicator       */
  82        unsigned int h:1;           /* 1: part. level reserved for VM use*/
  83        unsigned long long b2_53:52;/* 2-53: zeros                       */
  84        unsigned int es:1;          /* 54: basic-sampling enable control */
  85        unsigned int ed:1;          /* 55: diag-sampling enable control  */
  86        unsigned int b56_61:6;      /* 56-61: - zeros                    */
  87        unsigned int cs:1;          /* 62: basic-sampling activation control */
  88        unsigned int cd:1;          /* 63: diag-sampling activation control  */
  89        unsigned long interval;     /* 8-15: sampling interval           */
  90        unsigned long tear;         /* 16-23: TEAR contents              */
  91        unsigned long dear;         /* 24-31: DEAR contents              */
  92        /* 32-63:                                                        */
  93        unsigned long rsvrd1;       /* reserved                          */
  94        unsigned long rsvrd2;       /* reserved                          */
  95        unsigned long rsvrd3;       /* reserved                          */
  96        unsigned long rsvrd4;       /* reserved                          */
  97} __packed;
  98
  99struct hws_basic_entry {
 100        unsigned int def:16;        /* 0-15  Data Entry Format           */
 101        unsigned int R:4;           /* 16-19 reserved                    */
 102        unsigned int U:4;           /* 20-23 Number of unique instruct.  */
 103        unsigned int z:2;           /* zeros                             */
 104        unsigned int T:1;           /* 26 PSW DAT mode                   */
 105        unsigned int W:1;           /* 27 PSW wait state                 */
 106        unsigned int P:1;           /* 28 PSW Problem state              */
 107        unsigned int AS:2;          /* 29-30 PSW address-space control   */
 108        unsigned int I:1;           /* 31 entry valid or invalid         */
 109        unsigned int CL:2;          /* 32-33 Configuration Level         */
 110        unsigned int:14;
 111        unsigned int prim_asn:16;   /* primary ASN                       */
 112        unsigned long long ia;      /* Instruction Address               */
 113        unsigned long long gpp;     /* Guest Program Parameter           */
 114        unsigned long long hpp;     /* Host Program Parameter            */
 115} __packed;
 116
 117struct hws_diag_entry {
 118        unsigned int def:16;        /* 0-15  Data Entry Format           */
 119        unsigned int R:14;          /* 16-19 and 20-30 reserved          */
 120        unsigned int I:1;           /* 31 entry valid or invalid         */
 121        u8           data[];        /* Machine-dependent sample data     */
 122} __packed;
 123
 124struct hws_combined_entry {
 125        struct hws_basic_entry  basic;  /* Basic-sampling data entry */
 126        struct hws_diag_entry   diag;   /* Diagnostic-sampling data entry */
 127} __packed;
 128
 129struct hws_trailer_entry {
 130        union {
 131                struct {
 132                        unsigned int f:1;       /* 0 - Block Full Indicator   */
 133                        unsigned int a:1;       /* 1 - Alert request control  */
 134                        unsigned int t:1;       /* 2 - Timestamp format       */
 135                        unsigned long long:61;  /* 3 - 63: Reserved           */
 136                };
 137                unsigned long long flags;       /* 0 - 63: All indicators     */
 138        };
 139        unsigned long long overflow;     /* 64 - sample Overflow count        */
 140        unsigned char timestamp[16];     /* 16 - 31 timestamp                 */
 141        unsigned long long reserved1;    /* 32 -Reserved                      */
 142        unsigned long long reserved2;    /*                                   */
 143        unsigned long long progusage1;   /* 48 - reserved for programming use */
 144        unsigned long long progusage2;   /*                                   */
 145} __packed;
 146
 147/* Query counter information */
 148static inline int qctri(struct cpumf_ctr_info *info)
 149{
 150        int rc = -EINVAL;
 151
 152        asm volatile (
 153                "0:     .insn   s,0xb28e0000,%1\n"
 154                "1:     lhi     %0,0\n"
 155                "2:\n"
 156                EX_TABLE(1b, 2b)
 157                : "+d" (rc), "=Q" (*info));
 158        return rc;
 159}
 160
 161/* Load CPU-counter-set controls */
 162static inline int lcctl(u64 ctl)
 163{
 164        int cc;
 165
 166        asm volatile (
 167                "       .insn   s,0xb2840000,%1\n"
 168                "       ipm     %0\n"
 169                "       srl     %0,28\n"
 170                : "=d" (cc) : "m" (ctl) : "cc");
 171        return cc;
 172}
 173
 174/* Extract CPU counter */
 175static inline int __ecctr(u64 ctr, u64 *content)
 176{
 177        u64 _content;
 178        int cc;
 179
 180        asm volatile (
 181                "       .insn   rre,0xb2e40000,%0,%2\n"
 182                "       ipm     %1\n"
 183                "       srl     %1,28\n"
 184                : "=d" (_content), "=d" (cc) : "d" (ctr) : "cc");
 185        *content = _content;
 186        return cc;
 187}
 188
 189/* Extract CPU counter */
 190static inline int ecctr(u64 ctr, u64 *val)
 191{
 192        u64 content;
 193        int cc;
 194
 195        cc = __ecctr(ctr, &content);
 196        if (!cc)
 197                *val = content;
 198        return cc;
 199}
 200
 201/* Store CPU counter multiple for the MT utilization counter set */
 202static inline int stcctm5(u64 num, u64 *val)
 203{
 204        int cc;
 205
 206        asm volatile (
 207                "       .insn   rsy,0xeb0000000017,%2,5,%1\n"
 208                "       ipm     %0\n"
 209                "       srl     %0,28\n"
 210                : "=d" (cc)
 211                : "Q" (*val), "d" (num)
 212                : "cc", "memory");
 213        return cc;
 214}
 215
 216/* Query sampling information */
 217static inline int qsi(struct hws_qsi_info_block *info)
 218{
 219        int cc = 1;
 220
 221        asm volatile(
 222                "0:     .insn   s,0xb2860000,%1\n"
 223                "1:     lhi     %0,0\n"
 224                "2:\n"
 225                EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
 226                : "+d" (cc), "+Q" (*info));
 227        return cc ? -EINVAL : 0;
 228}
 229
 230/* Load sampling controls */
 231static inline int lsctl(struct hws_lsctl_request_block *req)
 232{
 233        int cc;
 234
 235        cc = 1;
 236        asm volatile(
 237                "0:     .insn   s,0xb2870000,0(%1)\n"
 238                "1:     ipm     %0\n"
 239                "       srl     %0,28\n"
 240                "2:\n"
 241                EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
 242                : "+d" (cc), "+a" (req)
 243                : "m" (*req)
 244                : "cc", "memory");
 245
 246        return cc ? -EINVAL : 0;
 247}
 248
 249/* Sampling control helper functions */
 250
 251#include <linux/time.h>
 252
 253static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi,
 254                                                unsigned long freq)
 255{
 256        return (USEC_PER_SEC / freq) * qsi->cpu_speed;
 257}
 258
 259static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi,
 260                                                unsigned long rate)
 261{
 262        return USEC_PER_SEC * qsi->cpu_speed / rate;
 263}
 264
 265#define SDB_TE_ALERT_REQ_MASK   0x4000000000000000UL
 266#define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL
 267
 268/* Return TOD timestamp contained in an trailer entry */
 269static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te)
 270{
 271        /* TOD in STCKE format */
 272        if (te->t)
 273                return *((unsigned long long *) &te->timestamp[1]);
 274
 275        /* TOD in STCK format */
 276        return *((unsigned long long *) &te->timestamp[0]);
 277}
 278
 279/* Return pointer to trailer entry of an sample data block */
 280static inline unsigned long *trailer_entry_ptr(unsigned long v)
 281{
 282        void *ret;
 283
 284        ret = (void *) v;
 285        ret += PAGE_SIZE;
 286        ret -= sizeof(struct hws_trailer_entry);
 287
 288        return (unsigned long *) ret;
 289}
 290
 291/* Return if the entry in the sample data block table (sdbt)
 292 * is a link to the next sdbt */
 293static inline int is_link_entry(unsigned long *s)
 294{
 295        return *s & 0x1ul ? 1 : 0;
 296}
 297
 298/* Return pointer to the linked sdbt */
 299static inline unsigned long *get_next_sdbt(unsigned long *s)
 300{
 301        return (unsigned long *) (*s & ~0x1ul);
 302}
 303#endif /* _ASM_S390_CPU_MF_H */
 304