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_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 */
  31static inline int cpum_cf_avail(void)
  32{
  33        return MACHINE_HAS_LPP && test_facility(67);
  34}
  35
  36static inline int cpum_sf_avail(void)
  37{
  38        return MACHINE_HAS_LPP && test_facility(68);
  39}
  40
  41
  42struct 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 */
  55struct 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 */
  78struct 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
  97struct 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
 114struct 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
 121struct 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
 126struct 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 */
 145static 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 */
 159static 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 */
 172static 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 */
 188static 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 */
 202static 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 */
 220static 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
 242static 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
 248static 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 */
 258static 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 */
 269static 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 */
 282static inline int is_link_entry(unsigned long *s)
 283{
 284        return *s & 0x1ul ? 1 : 0;
 285}
 286
 287/* Return pointer to the linked sdbt */
 288static inline unsigned long *get_next_sdbt(unsigned long *s)
 289{
 290        return (unsigned long *) (*s & ~0x1ul);
 291}
 292#endif /* _ASM_S390_CPU_MF_H */
 293