LXR qemu/tests/unit/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    X86CPUTopoInfo topo_info = {0};
  32
  33    /* simple tests for 1 thread per core, 1 core per die, 1 die per package */
  34    topo_info = (X86CPUTopoInfo) {1, 1, 1};
  35    g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 0);
  36    g_assert_cmpuint(apicid_core_width(&topo_info), ==, 0);
  37    g_assert_cmpuint(apicid_die_width(&topo_info), ==, 0);
  38
  39    topo_info = (X86CPUTopoInfo) {1, 1, 1};
  40    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 0), ==, 0);
  41    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 1), ==, 1);
  42    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 2), ==, 2);
  43    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 3), ==, 3);
  44
  45
  46    /* Test field width calculation for multiple values
  47     */
  48    topo_info = (X86CPUTopoInfo) {1, 1, 2};
  49    g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 1);
  50    topo_info = (X86CPUTopoInfo) {1, 1, 3};
  51    g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 2);
  52    topo_info = (X86CPUTopoInfo) {1, 1, 4};
  53    g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 2);
  54
  55    topo_info = (X86CPUTopoInfo) {1, 1, 14};
  56    g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 4);
  57    topo_info = (X86CPUTopoInfo) {1, 1, 15};
  58    g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 4);
  59    topo_info = (X86CPUTopoInfo) {1, 1, 16};
  60    g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 4);
  61    topo_info = (X86CPUTopoInfo) {1, 1, 17};
  62    g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 5);
  63
  64
  65    topo_info = (X86CPUTopoInfo) {1, 30, 2};
  66    g_assert_cmpuint(apicid_core_width(&topo_info), ==, 5);
  67    topo_info = (X86CPUTopoInfo) {1, 31, 2};
  68    g_assert_cmpuint(apicid_core_width(&topo_info), ==, 5);
  69    topo_info = (X86CPUTopoInfo) {1, 32, 2};
  70    g_assert_cmpuint(apicid_core_width(&topo_info), ==, 5);
  71    topo_info = (X86CPUTopoInfo) {1, 33, 2};
  72    g_assert_cmpuint(apicid_core_width(&topo_info), ==, 6);
  73
  74    topo_info = (X86CPUTopoInfo) {1, 30, 2};
  75    g_assert_cmpuint(apicid_die_width(&topo_info), ==, 0);
  76    topo_info = (X86CPUTopoInfo) {2, 30, 2};
  77    g_assert_cmpuint(apicid_die_width(&topo_info), ==, 1);
  78    topo_info = (X86CPUTopoInfo) {3, 30, 2};
  79    g_assert_cmpuint(apicid_die_width(&topo_info), ==, 2);
  80    topo_info = (X86CPUTopoInfo) {4, 30, 2};
  81    g_assert_cmpuint(apicid_die_width(&topo_info), ==, 2);
  82
  83    /* build a weird topology and see if IDs are calculated correctly
  84     */
  85
  86    /* This will use 2 bits for thread ID and 3 bits for core ID
  87     */
  88    topo_info = (X86CPUTopoInfo) {1, 6, 3};
  89    g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 2);
  90    g_assert_cmpuint(apicid_core_offset(&topo_info), ==, 2);
  91    g_assert_cmpuint(apicid_die_offset(&topo_info), ==, 5);
  92    g_assert_cmpuint(apicid_pkg_offset(&topo_info), ==, 5);
  93
  94    topo_info = (X86CPUTopoInfo) {1, 6, 3};
  95    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 0), ==, 0);
  96    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 1), ==, 1);
  97    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 2), ==, 2);
  98
  99    topo_info = (X86CPUTopoInfo) {1, 6, 3};
 100    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 1 * 3 + 0), ==,
 101                     (1 << 2) | 0);
 102    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 1 * 3 + 1), ==,
 103                     (1 << 2) | 1);
 104    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 1 * 3 + 2), ==,
 105                     (1 << 2) | 2);
 106
 107    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 2 * 3 + 0), ==,
 108                     (2 << 2) | 0);
 109    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 2 * 3 + 1), ==,
 110                     (2 << 2) | 1);
 111    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 2 * 3 + 2), ==,
 112                     (2 << 2) | 2);
 113
 114    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 5 * 3 + 0), ==,
 115                     (5 << 2) | 0);
 116    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 5 * 3 + 1), ==,
 117                     (5 << 2) | 1);
 118    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info, 5 * 3 + 2), ==,
 119                     (5 << 2) | 2);
 120
 121    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info,
 122                     1 * 6 * 3 + 0 * 3 + 0), ==, (1 << 5));
 123    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info,
 124                     1 * 6 * 3 + 1 * 3 + 1), ==, (1 << 5) | (1 << 2) | 1);
 125    g_assert_cmpuint(x86_apicid_from_cpu_idx(&topo_info,
 126                     3 * 6 * 3 + 5 * 3 + 2), ==, (3 << 5) | (5 << 2) | 2);
 127}
 128
 129int main(int argc, char **argv)
 130{
 131    g_test_init(&argc, &argv, NULL);
 132
 133    g_test_add_func("/cpuid/topology/basic", test_topo_bits);
 134
 135    g_test_run();
 136
 137    return 0;
 138}
 139