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 <asm/facility.h>
  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_CACA      (1 <<  7)       /* counter auth. change alert */
  23 #define CPU_MF_INT_CF_LCDA      (1 <<  6)       /* loss of counter data alert */
  24
  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 */
  31 static inline int cpum_cf_avail(void)
  32 {
  33         return MACHINE_HAS_SPP && test_facility(67);
  34 }
  35
  36 static inline int cpum_sf_avail(void)
  37 {
  38         return MACHINE_HAS_SPP && test_facility(68);
  39 }
  40
  41
  42 struct 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 counter information */
  55 static inline int qctri(struct cpumf_ctr_info *info)
  56 {
  57         int rc = -EINVAL;
  58
  59         asm volatile (
  60                 "0:     .insn   s,0xb28e0000,%1\n"
  61                 "1:     lhi     %0,0\n"
  62                 "2:\n"
  63                 EX_TABLE(1b, 2b)
  64                 : "+d" (rc), "=Q" (*info));
  65         return rc;
  66 }
  67
  68 /* Load CPU-counter-set controls */
  69 static inline int lcctl(u64 ctl)
  70 {
  71         int cc;
  72
  73         asm volatile (
  74                 "       .insn   s,0xb2840000,%1\n"
  75                 "       ipm     %0\n"
  76                 "       srl     %0,28\n"
  77                 : "=d" (cc) : "m" (ctl) : "cc");
  78         return cc;
  79 }
  80
  81 /* Extract CPU counter */
  82 static inline int ecctr(u64 ctr, u64 *val)
  83 {
  84         register u64 content asm("4") = 0;
  85         int cc;
  86
  87         asm volatile (
  88                 "       .insn   rre,0xb2e40000,%0,%2\n"
  89                 "       ipm     %1\n"
  90                 "       srl     %1,28\n"
  91                 : "=d" (content), "=d" (cc) : "d" (ctr) : "cc");
  92         if (!cc)
  93                 *val = content;
  94         return cc;
  95 }
  96
  97 #endif /* _ASM_S390_CPU_MF_H */