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
  29 static 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) {0, 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) {0, 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) {0, 1, 1, 2};
  49     g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 1);
  50     topo_info = (X86CPUTopoInfo) {0, 1, 1, 3};
  51     g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 2);
  52     topo_info = (X86CPUTopoInfo) {0, 1, 1, 4};
  53     g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 2);
  54
  55     topo_info = (X86CPUTopoInfo) {0, 1, 1, 14};
  56     g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 4);
  57     topo_info = (X86CPUTopoInfo) {0, 1, 1, 15};
  58     g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 4);
  59     topo_info = (X86CPUTopoInfo) {0, 1, 1, 16};
  60     g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 4);
  61     topo_info = (X86CPUTopoInfo) {0, 1, 1, 17};
  62     g_assert_cmpuint(apicid_smt_width(&topo_info), ==, 5);
  63
  64
  65     topo_info = (X86CPUTopoInfo) {0, 1, 30, 2};
  66     g_assert_cmpuint(apicid_core_width(&topo_info), ==, 5);
  67     topo_info = (X86CPUTopoInfo) {0, 1, 31, 2};
  68     g_assert_cmpuint(apicid_core_width(&topo_info), ==, 5);
  69     topo_info = (X86CPUTopoInfo) {0, 1, 32, 2};
  70     g_assert_cmpuint(apicid_core_width(&topo_info), ==, 5);
  71     topo_info = (X86CPUTopoInfo) {0, 1, 33, 2};
  72     g_assert_cmpuint(apicid_core_width(&topo_info), ==, 6);
  73
  74     topo_info = (X86CPUTopoInfo) {0, 1, 30, 2};
  75     g_assert_cmpuint(apicid_die_width(&topo_info), ==, 0);
  76     topo_info = (X86CPUTopoInfo) {0, 2, 30, 2};
  77     g_assert_cmpuint(apicid_die_width(&topo_info), ==, 1);
  78     topo_info = (X86CPUTopoInfo) {0, 3, 30, 2};
  79     g_assert_cmpuint(apicid_die_width(&topo_info), ==, 2);
  80     topo_info = (X86CPUTopoInfo) {0, 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) {0, 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) {0, 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) {0, 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
 129 int 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 }