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RISC-V: selftests: Add which-cpus hwprobe test
Test the RISCV_HWPROBE_WHICH_CPUS flag of hwprobe. The test also has a command line interface in order to get the cpu list for arbitrary hwprobe pairs. Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Andrew Jones <ajones@ventanamicro.com> Link: https://lore.kernel.org/r/20231122164700.127954-10-ajones@ventanamicro.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Andrew Jones
Palmer Dabbelt
parent
e178bf146e
commit
ef7d6abb2c
@ -4,7 +4,7 @@
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CFLAGS += -I$(top_srcdir)/tools/include
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TEST_GEN_PROGS := hwprobe cbo
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TEST_GEN_PROGS := hwprobe cbo which-cpus
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include ../../lib.mk
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@ -13,3 +13,6 @@ $(OUTPUT)/hwprobe: hwprobe.c sys_hwprobe.S
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$(OUTPUT)/cbo: cbo.c sys_hwprobe.S
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$(CC) -static -o$@ $(CFLAGS) $(LDFLAGS) $^
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$(OUTPUT)/which-cpus: which-cpus.c sys_hwprobe.S
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$(CC) -static -o$@ $(CFLAGS) $(LDFLAGS) $^
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154
tools/testing/selftests/riscv/hwprobe/which-cpus.c
Normal file
154
tools/testing/selftests/riscv/hwprobe/which-cpus.c
Normal file
@ -0,0 +1,154 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2023 Ventana Micro Systems Inc.
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*
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* Test the RISCV_HWPROBE_WHICH_CPUS flag of hwprobe. Also provides a command
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* line interface to get the cpu list for arbitrary hwprobe pairs.
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*/
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sched.h>
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#include <unistd.h>
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#include <assert.h>
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#include "hwprobe.h"
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#include "../../kselftest.h"
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static void help(void)
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{
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printf("\n"
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"which-cpus: [-h] [<key=value> [<key=value> ...]]\n\n"
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" Without parameters, tests the RISCV_HWPROBE_WHICH_CPUS flag of hwprobe.\n"
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" With parameters, where each parameter is a hwprobe pair written as\n"
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" <key=value>, outputs the cpulist for cpus which all match the given set\n"
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" of pairs. 'key' and 'value' should be in numeric form, e.g. 4=0x3b\n");
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}
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static void print_cpulist(cpu_set_t *cpus)
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{
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int start = 0, end = 0;
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if (!CPU_COUNT(cpus)) {
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printf("cpus: None\n");
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return;
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}
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printf("cpus:");
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for (int i = 0, c = 0; i < CPU_COUNT(cpus); i++, c++) {
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if (start != end && !CPU_ISSET(c, cpus))
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printf("-%d", end);
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while (!CPU_ISSET(c, cpus))
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++c;
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if (i != 0 && c == end + 1) {
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end = c;
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continue;
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}
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printf("%c%d", i == 0 ? ' ' : ',', c);
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start = end = c;
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}
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if (start != end)
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printf("-%d", end);
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printf("\n");
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}
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static void do_which_cpus(int argc, char **argv, cpu_set_t *cpus)
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{
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struct riscv_hwprobe *pairs;
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int nr_pairs = argc - 1;
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char *start, *end;
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int rc;
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pairs = malloc(nr_pairs * sizeof(struct riscv_hwprobe));
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assert(pairs);
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for (int i = 0; i < nr_pairs; i++) {
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start = argv[i + 1];
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pairs[i].key = strtol(start, &end, 0);
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assert(end != start && *end == '=');
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start = end + 1;
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pairs[i].value = strtoul(start, &end, 0);
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assert(end != start && *end == '\0');
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}
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rc = riscv_hwprobe(pairs, nr_pairs, sizeof(cpu_set_t), (unsigned long *)cpus, RISCV_HWPROBE_WHICH_CPUS);
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assert(rc == 0);
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print_cpulist(cpus);
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free(pairs);
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}
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int main(int argc, char **argv)
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{
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struct riscv_hwprobe pairs[2];
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cpu_set_t cpus_aff, cpus;
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__u64 ext0_all;
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long rc;
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rc = sched_getaffinity(0, sizeof(cpu_set_t), &cpus_aff);
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assert(rc == 0);
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if (argc > 1) {
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if (!strcmp(argv[1], "-h"))
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help();
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else
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do_which_cpus(argc, argv, &cpus_aff);
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return 0;
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}
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ksft_print_header();
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ksft_set_plan(7);
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pairs[0] = (struct riscv_hwprobe){ .key = RISCV_HWPROBE_KEY_BASE_BEHAVIOR, };
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rc = riscv_hwprobe(pairs, 1, 0, NULL, 0);
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assert(rc == 0 && pairs[0].key == RISCV_HWPROBE_KEY_BASE_BEHAVIOR &&
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pairs[0].value == RISCV_HWPROBE_BASE_BEHAVIOR_IMA);
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pairs[0] = (struct riscv_hwprobe){ .key = RISCV_HWPROBE_KEY_IMA_EXT_0, };
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rc = riscv_hwprobe(pairs, 1, 0, NULL, 0);
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assert(rc == 0 && pairs[0].key == RISCV_HWPROBE_KEY_IMA_EXT_0);
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ext0_all = pairs[0].value;
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pairs[0] = (struct riscv_hwprobe){ .key = RISCV_HWPROBE_KEY_BASE_BEHAVIOR, .value = RISCV_HWPROBE_BASE_BEHAVIOR_IMA, };
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CPU_ZERO(&cpus);
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rc = riscv_hwprobe(pairs, 1, 0, (unsigned long *)&cpus, RISCV_HWPROBE_WHICH_CPUS);
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ksft_test_result(rc == -EINVAL, "no cpusetsize\n");
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pairs[0] = (struct riscv_hwprobe){ .key = RISCV_HWPROBE_KEY_BASE_BEHAVIOR, .value = RISCV_HWPROBE_BASE_BEHAVIOR_IMA, };
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rc = riscv_hwprobe(pairs, 1, sizeof(cpu_set_t), NULL, RISCV_HWPROBE_WHICH_CPUS);
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ksft_test_result(rc == -EINVAL, "NULL cpus\n");
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pairs[0] = (struct riscv_hwprobe){ .key = 0xbadc0de, };
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CPU_ZERO(&cpus);
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rc = riscv_hwprobe(pairs, 1, sizeof(cpu_set_t), (unsigned long *)&cpus, RISCV_HWPROBE_WHICH_CPUS);
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ksft_test_result(rc == 0 && CPU_COUNT(&cpus) == 0, "unknown key\n");
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pairs[0] = (struct riscv_hwprobe){ .key = RISCV_HWPROBE_KEY_BASE_BEHAVIOR, .value = RISCV_HWPROBE_BASE_BEHAVIOR_IMA, };
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pairs[1] = (struct riscv_hwprobe){ .key = RISCV_HWPROBE_KEY_BASE_BEHAVIOR, .value = RISCV_HWPROBE_BASE_BEHAVIOR_IMA, };
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CPU_ZERO(&cpus);
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rc = riscv_hwprobe(pairs, 2, sizeof(cpu_set_t), (unsigned long *)&cpus, RISCV_HWPROBE_WHICH_CPUS);
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ksft_test_result(rc == 0, "duplicate keys\n");
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pairs[0] = (struct riscv_hwprobe){ .key = RISCV_HWPROBE_KEY_BASE_BEHAVIOR, .value = RISCV_HWPROBE_BASE_BEHAVIOR_IMA, };
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pairs[1] = (struct riscv_hwprobe){ .key = RISCV_HWPROBE_KEY_IMA_EXT_0, .value = ext0_all, };
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CPU_ZERO(&cpus);
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rc = riscv_hwprobe(pairs, 2, sizeof(cpu_set_t), (unsigned long *)&cpus, RISCV_HWPROBE_WHICH_CPUS);
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ksft_test_result(rc == 0 && CPU_COUNT(&cpus) == sysconf(_SC_NPROCESSORS_ONLN), "set all cpus\n");
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pairs[0] = (struct riscv_hwprobe){ .key = RISCV_HWPROBE_KEY_BASE_BEHAVIOR, .value = RISCV_HWPROBE_BASE_BEHAVIOR_IMA, };
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pairs[1] = (struct riscv_hwprobe){ .key = RISCV_HWPROBE_KEY_IMA_EXT_0, .value = ext0_all, };
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memcpy(&cpus, &cpus_aff, sizeof(cpu_set_t));
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rc = riscv_hwprobe(pairs, 2, sizeof(cpu_set_t), (unsigned long *)&cpus, RISCV_HWPROBE_WHICH_CPUS);
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ksft_test_result(rc == 0 && CPU_EQUAL(&cpus, &cpus_aff), "set all affinity cpus\n");
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pairs[0] = (struct riscv_hwprobe){ .key = RISCV_HWPROBE_KEY_BASE_BEHAVIOR, .value = RISCV_HWPROBE_BASE_BEHAVIOR_IMA, };
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pairs[1] = (struct riscv_hwprobe){ .key = RISCV_HWPROBE_KEY_IMA_EXT_0, .value = ~ext0_all, };
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memcpy(&cpus, &cpus_aff, sizeof(cpu_set_t));
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rc = riscv_hwprobe(pairs, 2, sizeof(cpu_set_t), (unsigned long *)&cpus, RISCV_HWPROBE_WHICH_CPUS);
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ksft_test_result(rc == 0 && CPU_COUNT(&cpus) == 0, "clear all cpus\n");
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ksft_finished();
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}
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