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_RI_HALTED    (1 <<  5)       /* run-time instr. halted */
  26 #define CPU_MF_INT_RI_BUF_FULL  (1 <<  4)       /* run-time instr. program
  27                                                    buffer full */
  28
  29 #define CPU_MF_INT_CF_MASK      (CPU_MF_INT_CF_CACA|CPU_MF_INT_CF_LCDA)
  30 #define CPU_MF_INT_SF_MASK      (CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE|   \
  31                                  CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA|  \
  32                                  CPU_MF_INT_SF_LSDA)
  33 #define CPU_MF_INT_RI_MASK      (CPU_MF_INT_RI_HALTED|CPU_MF_INT_RI_BUF_FULL)
  34
  35 /* CPU measurement facility support */
  36 static inline int cpum_cf_avail(void)
  37 {
  38         return MACHINE_HAS_LPP && test_facility(67);
  39 }
  40
  41 static inline int cpum_sf_avail(void)
  42 {
  43         return MACHINE_HAS_LPP && test_facility(68);
  44 }
  45
  46
  47 struct cpumf_ctr_info {
  48         u16   cfvn;
  49         u16   auth_ctl;
  50         u16   enable_ctl;
  51         u16   act_ctl;
  52         u16   max_cpu;
  53         u16   csvn;
  54         u16   max_cg;
  55         u16   reserved1;
  56         u32   reserved2[12];
  57 } __packed;
  58
  59 /* Query counter information */
  60 static inline int qctri(struct cpumf_ctr_info *info)
  61 {
  62         int rc = -EINVAL;
  63
  64         asm volatile (
  65                 "0:     .insn   s,0xb28e0000,%1\n"
  66                 "1:     lhi     %0,0\n"
  67                 "2:\n"
  68                 EX_TABLE(1b, 2b)
  69                 : "+d" (rc), "=Q" (*info));
  70         return rc;
  71 }
  72
  73 /* Load CPU-counter-set controls */
  74 static inline int lcctl(u64 ctl)
  75 {
  76         int cc;
  77
  78         asm volatile (
  79                 "       .insn   s,0xb2840000,%1\n"
  80                 "       ipm     %0\n"
  81                 "       srl     %0,28\n"
  82                 : "=d" (cc) : "m" (ctl) : "cc");
  83         return cc;
  84 }
  85
  86 /* Extract CPU counter */
  87 static inline int ecctr(u64 ctr, u64 *val)
  88 {
  89         register u64 content asm("4") = 0;
  90         int cc;
  91
  92         asm volatile (
  93                 "       .insn   rre,0xb2e40000,%0,%2\n"
  94                 "       ipm     %1\n"
  95                 "       srl     %1,28\n"
  96                 : "=d" (content), "=d" (cc) : "d" (ctr) : "cc");
  97         if (!cc)
  98                 *val = content;
  99         return cc;
 100 }
 101
 102 #endif /* _ASM_S390_CPU_MF_H */