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This introduces utility functions for the APIC ID calculation, based on: Intel® 64 Architecture Processor Topology Enumeration http://software.intel.com/en-us/articles/intel-64-architecture-processor-topology-enumeration/ The code should be compatible with AMD's "Extended Method" described at: AMD CPUID Specification (Publication #25481) Section 3: Multiple Core Calcuation as long as: - nr_threads is set to 1; - OFFSET_IDX is assumed to be 0; - CPUID Fn8000_0008_ECX[ApicIdCoreIdSize[3:0]] is set to apicid_core_width(). Unit tests included. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
111 lines
4.2 KiB
C
111 lines
4.2 KiB
C
/*
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* Test code for x86 CPUID and Topology functions
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*
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* Copyright (c) 2012 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <glib.h>
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#include "topology.h"
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static void test_topo_bits(void)
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{
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/* simple tests for 1 thread per core, 1 core per socket */
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g_assert_cmpuint(apicid_smt_width(1, 1), ==, 0);
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g_assert_cmpuint(apicid_core_width(1, 1), ==, 0);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 1, 0), ==, 0);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 1, 1), ==, 1);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 1, 2), ==, 2);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(1, 1, 3), ==, 3);
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/* Test field width calculation for multiple values
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*/
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g_assert_cmpuint(apicid_smt_width(1, 2), ==, 1);
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g_assert_cmpuint(apicid_smt_width(1, 3), ==, 2);
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g_assert_cmpuint(apicid_smt_width(1, 4), ==, 2);
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g_assert_cmpuint(apicid_smt_width(1, 14), ==, 4);
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g_assert_cmpuint(apicid_smt_width(1, 15), ==, 4);
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g_assert_cmpuint(apicid_smt_width(1, 16), ==, 4);
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g_assert_cmpuint(apicid_smt_width(1, 17), ==, 5);
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g_assert_cmpuint(apicid_core_width(30, 2), ==, 5);
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g_assert_cmpuint(apicid_core_width(31, 2), ==, 5);
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g_assert_cmpuint(apicid_core_width(32, 2), ==, 5);
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g_assert_cmpuint(apicid_core_width(33, 2), ==, 6);
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/* build a weird topology and see if IDs are calculated correctly
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*/
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/* This will use 2 bits for thread ID and 3 bits for core ID
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*/
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g_assert_cmpuint(apicid_smt_width(6, 3), ==, 2);
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g_assert_cmpuint(apicid_core_width(6, 3), ==, 3);
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g_assert_cmpuint(apicid_pkg_offset(6, 3), ==, 5);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 0), ==, 0);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 1), ==, 1);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 2), ==, 2);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 1 * 3 + 0), ==,
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(1 << 2) | 0);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 1 * 3 + 1), ==,
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(1 << 2) | 1);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 1 * 3 + 2), ==,
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(1 << 2) | 2);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 2 * 3 + 0), ==,
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(2 << 2) | 0);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 2 * 3 + 1), ==,
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(2 << 2) | 1);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 2 * 3 + 2), ==,
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(2 << 2) | 2);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 5 * 3 + 0), ==,
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(5 << 2) | 0);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 5 * 3 + 1), ==,
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(5 << 2) | 1);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 5 * 3 + 2), ==,
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(5 << 2) | 2);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 1 * 6 * 3 + 0 * 3 + 0), ==,
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(1 << 5));
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 1 * 6 * 3 + 1 * 3 + 1), ==,
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(1 << 5) | (1 << 2) | 1);
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g_assert_cmpuint(x86_apicid_from_cpu_idx(6, 3, 3 * 6 * 3 + 5 * 3 + 2), ==,
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(3 << 5) | (5 << 2) | 2);
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}
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int main(int argc, char **argv)
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{
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g_test_init(&argc, &argv, NULL);
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g_test_add_func("/cpuid/topology/basic", test_topo_bits);
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g_test_run();
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return 0;
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}
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