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_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 */
  36static inline int cpum_cf_avail(void)
  37{
  38        return MACHINE_HAS_LPP && test_facility(67);
  39}
  40
  41static inline int cpum_sf_avail(void)
  42{
  43        return MACHINE_HAS_LPP && test_facility(68);
  44}
  45
  46
  47struct 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 */
  60static 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 */
  74static 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 */
  87static 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 */
 103