sys-utils/lscpu-cpu.c

   1 /*
   2  * SPDX-License-Identifier: GPL-2.0-or-later
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * Copyright (C) 2020 Karel Zak <kzak@redhat.com>
  10  */
  11 #include "lscpu.h"
  12
  13 struct lscpu_cpu *lscpu_new_cpu(int id)
  14 {
  15         struct lscpu_cpu *cpu;
  16
  17         cpu = xcalloc(1, sizeof(struct lscpu_cpu));
  18         cpu->refcount = 1;
  19         cpu->logical_id = id;
  20         cpu->coreid = -1;
  21         cpu->socketid = -1;
  22         cpu->bookid = -1;
  23         cpu->bookid = -1;
  24         cpu->address = -1;
  25         cpu->configured = -1;
  26
  27         DBG(CPU, ul_debugobj(cpu, "alloc"));
  28         return cpu;
  29 }
  30
  31 void lscpu_ref_cpu(struct lscpu_cpu *cpu)
  32 {
  33         if (cpu)
  34                 cpu->refcount++;
  35 }
  36
  37 void lscpu_unref_cpu(struct lscpu_cpu *cpu)
  38 {
  39         if (!cpu)
  40                 return;
  41
  42         if (--cpu->refcount <= 0) {
  43                 DBG(CPU, ul_debugobj(cpu, "  freeing #%d", cpu->logical_id));
  44                 lscpu_unref_cputype(cpu->type);
  45                 cpu->type = NULL;
  46                 free(cpu->dynamic_mhz);
  47                 free(cpu->static_mhz);
  48                 free(cpu->mhz);
  49                 free(cpu->bogomips);
  50                 free(cpu);
  51         }
  52 }
  53
  54 /*
  55  * Create and initialize array with CPU structs according to @cpuset.
  56  */
  57 int lscpu_create_cpus(struct lscpu_cxt *cxt, cpu_set_t *cpuset, size_t setsize)
  58 {
  59         size_t n, i;
  60
  61         assert(!cxt->cpus);
  62
  63         cxt->npossibles = CPU_COUNT_S(setsize, cpuset);
  64         cxt->cpus = xcalloc(1, cxt->npossibles * sizeof(struct lscpu_cpu *));
  65
  66         for (n = 0, i = 0; n < (size_t) cxt->maxcpus && i < cxt->npossibles; n++) {
  67                 if (CPU_ISSET_S(n, setsize, cpuset))
  68                         cxt->cpus[i++] = lscpu_new_cpu(n);
  69         }
  70
  71         return 0;
  72 }
  73
  74 int lscpu_cpu_set_type(struct lscpu_cpu *cpu, struct lscpu_cputype *type)
  75 {
  76         if (cpu->type == type)
  77                 return 0;
  78
  79         lscpu_unref_cputype(cpu->type);
  80         cpu->type = type;
  81         lscpu_ref_cputype(type);
  82
  83         DBG(CPU, ul_debugobj(cpu, "cputype set to %s", type ? type->vendor : NULL));
  84         return 0;
  85 }
  86
  87 /* don't forget lscpu_ref_cpu() ! */
  88 struct lscpu_cpu *lscpu_get_cpu(struct lscpu_cxt *cxt, int logical_id)
  89 {
  90         size_t i;
  91
  92         for (i = 0; i < cxt->npossibles; i++) {
  93                 struct lscpu_cpu *cpu = cxt->cpus[i];
  94
  95                 if (cpu && cpu->logical_id == logical_id)
  96                         return cpu;
  97         }
  98
  99         return NULL;
 100 }