LXR qemu/tests/test-x86-cpuid.c

   1/*
   2 *  Test code for x86 CPUID and Topology functions
   3 *
   4 *  Copyright (c) 2012 Red Hat Inc.
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a copy
   7 * of this software and associated documentation files (the "Software"), to deal
   8 * in the Software without restriction, including without limitation the rights
   9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 * copies of the Software, and to permit persons to whom the Software is
  11 * furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 * THE SOFTWARE.
  23 */
  24
  25#include "qemu/osdep.h"
  26
  27#include "hw/i386/topology.h"
  28
  29static void test_topo_bits(void)
  30{
  31    /* simple tests for 1 thread per core, 1 core per die, 1 die per package */
  32    g_assert_cmpuint(apicid_smt_width(1, 1, 1), ==, 0);
  33    g_assert_cmpuint(apicid_core_width(1, 1, 1), ==, 0);
  34    g_assert_cmpuint(apicid_die_width(1, 1, 1), ==, 0);
  35
  36    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 1, 1, 0), ==, 0);
  37    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 1, 1, 1), ==, 1);
  38    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 1, 1, 2), ==, 2);
  39    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 1, 1, 3), ==, 3);
  40
  41
  42    /* Test field width calculation for multiple values
  43     */
  44    g_assert_cmpuint(apicid_smt_width(1, 1, 2), ==, 1);
  45    g_assert_cmpuint(apicid_smt_width(1, 1, 3), ==, 2);
  46    g_assert_cmpuint(apicid_smt_width(1, 1, 4), ==, 2);
  47
  48    g_assert_cmpuint(apicid_smt_width(1, 1, 14), ==, 4);
  49    g_assert_cmpuint(apicid_smt_width(1, 1, 15), ==, 4);
  50    g_assert_cmpuint(apicid_smt_width(1, 1, 16), ==, 4);
  51    g_assert_cmpuint(apicid_smt_width(1, 1, 17), ==, 5);
  52
  53
  54    g_assert_cmpuint(apicid_core_width(1, 30, 2), ==, 5);
  55    g_assert_cmpuint(apicid_core_width(1, 31, 2), ==, 5);
  56    g_assert_cmpuint(apicid_core_width(1, 32, 2), ==, 5);
  57    g_assert_cmpuint(apicid_core_width(1, 33, 2), ==, 6);
  58
  59    g_assert_cmpuint(apicid_die_width(1, 30, 2), ==, 0);
  60    g_assert_cmpuint(apicid_die_width(2, 30, 2), ==, 1);
  61    g_assert_cmpuint(apicid_die_width(3, 30, 2), ==, 2);
  62    g_assert_cmpuint(apicid_die_width(4, 30, 2), ==, 2);
  63
  64    /* build a weird topology and see if IDs are calculated correctly
  65     */
  66
  67    /* This will use 2 bits for thread ID and 3 bits for core ID
  68     */
  69    g_assert_cmpuint(apicid_smt_width(1, 6, 3), ==, 2);
  70    g_assert_cmpuint(apicid_core_offset(1, 6, 3), ==, 2);
  71    g_assert_cmpuint(apicid_die_offset(1, 6, 3), ==, 5);
  72    g_assert_cmpuint(apicid_pkg_offset(1, 6, 3), ==, 5);
  73
  74    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3, 0), ==, 0);
  75    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3, 1), ==, 1);
  76    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3, 2), ==, 2);
  77
  78    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3, 1 * 3 + 0), ==,
  79                     (1 << 2) | 0);
  80    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3, 1 * 3 + 1), ==,
  81                     (1 << 2) | 1);
  82    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3, 1 * 3 + 2), ==,
  83                     (1 << 2) | 2);
  84
  85    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3, 2 * 3 + 0), ==,
  86                     (2 << 2) | 0);
  87    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3, 2 * 3 + 1), ==,
  88                     (2 << 2) | 1);
  89    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3, 2 * 3 + 2), ==,
  90                     (2 << 2) | 2);
  91
  92    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3, 5 * 3 + 0), ==,
  93                     (5 << 2) | 0);
  94    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3, 5 * 3 + 1), ==,
  95                     (5 << 2) | 1);
  96    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3, 5 * 3 + 2), ==,
  97                     (5 << 2) | 2);
  98
  99    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3,
 100                     1 * 6 * 3 + 0 * 3 + 0), ==, (1 << 5));
 101    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3,
 102                     1 * 6 * 3 + 1 * 3 + 1), ==, (1 << 5) | (1 << 2) | 1);
 103    g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 6, 3,
 104                     3 * 6 * 3 + 5 * 3 + 2), ==, (3 << 5) | (5 << 2) | 2);
 105}
 106
 107int main(int argc, char **argv)
 108{
 109    g_test_init(&argc, &argv, NULL);
 110
 111    g_test_add_func("/cpuid/topology/basic", test_topo_bits);
 112
 113    g_test_run();
 114
 115    return 0;
 116}
 117