diff options
Diffstat (limited to 'tools/testing/selftests/breakpoints')
| -rw-r--r-- | tools/testing/selftests/breakpoints/.gitignore | 2 | ||||
| -rw-r--r-- | tools/testing/selftests/breakpoints/Makefile | 16 | ||||
| -rw-r--r-- | tools/testing/selftests/breakpoints/breakpoint_test.c | 401 | ||||
| -rw-r--r-- | tools/testing/selftests/breakpoints/breakpoint_test_arm64.c | 258 | ||||
| -rw-r--r-- | tools/testing/selftests/breakpoints/step_after_suspend_test.c | 220 |
5 files changed, 897 insertions, 0 deletions
diff --git a/tools/testing/selftests/breakpoints/.gitignore b/tools/testing/selftests/breakpoints/.gitignore new file mode 100644 index 000000000..a23bb4a6f --- /dev/null +++ b/tools/testing/selftests/breakpoints/.gitignore @@ -0,0 +1,2 @@ +breakpoint_test +step_after_suspend_test diff --git a/tools/testing/selftests/breakpoints/Makefile b/tools/testing/selftests/breakpoints/Makefile new file mode 100644 index 000000000..9ec2c78de --- /dev/null +++ b/tools/testing/selftests/breakpoints/Makefile @@ -0,0 +1,16 @@ +# SPDX-License-Identifier: GPL-2.0 +# Taken from perf makefile +uname_M := $(shell uname -m 2>/dev/null || echo not) +ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/) + +TEST_GEN_PROGS := step_after_suspend_test + +ifeq ($(ARCH),x86) +TEST_GEN_PROGS += breakpoint_test +endif +ifneq (,$(filter $(ARCH),aarch64 arm64)) +TEST_GEN_PROGS += breakpoint_test_arm64 +endif + +include ../lib.mk + diff --git a/tools/testing/selftests/breakpoints/breakpoint_test.c b/tools/testing/selftests/breakpoints/breakpoint_test.c new file mode 100644 index 000000000..901b85ea6 --- /dev/null +++ b/tools/testing/selftests/breakpoints/breakpoint_test.c @@ -0,0 +1,401 @@ +/* + * Copyright (C) 2011 Red Hat, Inc., Frederic Weisbecker <fweisbec@redhat.com> + * + * Licensed under the terms of the GNU GPL License version 2 + * + * Selftests for breakpoints (and more generally the do_debug() path) in x86. + */ + + +#include <sys/ptrace.h> +#include <unistd.h> +#include <stddef.h> +#include <sys/user.h> +#include <stdio.h> +#include <stdlib.h> +#include <signal.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <errno.h> +#include <string.h> + +#include "../kselftest.h" + + +/* Breakpoint access modes */ +enum { + BP_X = 1, + BP_RW = 2, + BP_W = 4, +}; + +static pid_t child_pid; + +/* + * Ensures the child and parent are always "talking" about + * the same test sequence. (ie: that we haven't forgotten + * to call check_trapped() somewhere). + */ +static int nr_tests; + +static void set_breakpoint_addr(void *addr, int n) +{ + int ret; + + ret = ptrace(PTRACE_POKEUSER, child_pid, + offsetof(struct user, u_debugreg[n]), addr); + if (ret) + ksft_exit_fail_msg("Can't set breakpoint addr: %s\n", + strerror(errno)); +} + +static void toggle_breakpoint(int n, int type, int len, + int local, int global, int set) +{ + int ret; + + int xtype, xlen; + unsigned long vdr7, dr7; + + switch (type) { + case BP_X: + xtype = 0; + break; + case BP_W: + xtype = 1; + break; + case BP_RW: + xtype = 3; + break; + } + + switch (len) { + case 1: + xlen = 0; + break; + case 2: + xlen = 4; + break; + case 4: + xlen = 0xc; + break; + case 8: + xlen = 8; + break; + } + + dr7 = ptrace(PTRACE_PEEKUSER, child_pid, + offsetof(struct user, u_debugreg[7]), 0); + + vdr7 = (xlen | xtype) << 16; + vdr7 <<= 4 * n; + + if (local) { + vdr7 |= 1 << (2 * n); + vdr7 |= 1 << 8; + } + if (global) { + vdr7 |= 2 << (2 * n); + vdr7 |= 1 << 9; + } + + if (set) + dr7 |= vdr7; + else + dr7 &= ~vdr7; + + ret = ptrace(PTRACE_POKEUSER, child_pid, + offsetof(struct user, u_debugreg[7]), dr7); + if (ret) { + ksft_print_msg("Can't set dr7: %s\n", strerror(errno)); + exit(-1); + } +} + +/* Dummy variables to test read/write accesses */ +static unsigned long long dummy_var[4]; + +/* Dummy functions to test execution accesses */ +static void dummy_func(void) { } +static void dummy_func1(void) { } +static void dummy_func2(void) { } +static void dummy_func3(void) { } + +static void (*dummy_funcs[])(void) = { + dummy_func, + dummy_func1, + dummy_func2, + dummy_func3, +}; + +static int trapped; + +static void check_trapped(void) +{ + /* + * If we haven't trapped, wake up the parent + * so that it notices the failure. + */ + if (!trapped) + kill(getpid(), SIGUSR1); + trapped = 0; + + nr_tests++; +} + +static void write_var(int len) +{ + char *pcval; short *psval; int *pival; long long *plval; + int i; + + for (i = 0; i < 4; i++) { + switch (len) { + case 1: + pcval = (char *)&dummy_var[i]; + *pcval = 0xff; + break; + case 2: + psval = (short *)&dummy_var[i]; + *psval = 0xffff; + break; + case 4: + pival = (int *)&dummy_var[i]; + *pival = 0xffffffff; + break; + case 8: + plval = (long long *)&dummy_var[i]; + *plval = 0xffffffffffffffffLL; + break; + } + check_trapped(); + } +} + +static void read_var(int len) +{ + char cval; short sval; int ival; long long lval; + int i; + + for (i = 0; i < 4; i++) { + switch (len) { + case 1: + cval = *(char *)&dummy_var[i]; + break; + case 2: + sval = *(short *)&dummy_var[i]; + break; + case 4: + ival = *(int *)&dummy_var[i]; + break; + case 8: + lval = *(long long *)&dummy_var[i]; + break; + } + check_trapped(); + } +} + +/* + * Do the r/w/x accesses to trigger the breakpoints. And run + * the usual traps. + */ +static void trigger_tests(void) +{ + int len, local, global, i; + char val; + int ret; + + ret = ptrace(PTRACE_TRACEME, 0, NULL, 0); + if (ret) { + ksft_print_msg("Can't be traced? %s\n", strerror(errno)); + return; + } + + /* Wake up father so that it sets up the first test */ + kill(getpid(), SIGUSR1); + + /* Test instruction breakpoints */ + for (local = 0; local < 2; local++) { + for (global = 0; global < 2; global++) { + if (!local && !global) + continue; + + for (i = 0; i < 4; i++) { + dummy_funcs[i](); + check_trapped(); + } + } + } + + /* Test write watchpoints */ + for (len = 1; len <= sizeof(long); len <<= 1) { + for (local = 0; local < 2; local++) { + for (global = 0; global < 2; global++) { + if (!local && !global) + continue; + write_var(len); + } + } + } + + /* Test read/write watchpoints (on read accesses) */ + for (len = 1; len <= sizeof(long); len <<= 1) { + for (local = 0; local < 2; local++) { + for (global = 0; global < 2; global++) { + if (!local && !global) + continue; + read_var(len); + } + } + } + + /* Icebp trap */ + asm(".byte 0xf1\n"); + check_trapped(); + + /* Int 3 trap */ + asm("int $3\n"); + check_trapped(); + + kill(getpid(), SIGUSR1); +} + +static void check_success(const char *msg) +{ + int child_nr_tests; + int status; + int ret; + + /* Wait for the child to SIGTRAP */ + wait(&status); + + ret = 0; + + if (WSTOPSIG(status) == SIGTRAP) { + child_nr_tests = ptrace(PTRACE_PEEKDATA, child_pid, + &nr_tests, 0); + if (child_nr_tests == nr_tests) + ret = 1; + if (ptrace(PTRACE_POKEDATA, child_pid, &trapped, 1)) + ksft_exit_fail_msg("Can't poke: %s\n", strerror(errno)); + } + + nr_tests++; + + if (ret) + ksft_test_result_pass(msg); + else + ksft_test_result_fail(msg); +} + +static void launch_instruction_breakpoints(char *buf, int local, int global) +{ + int i; + + for (i = 0; i < 4; i++) { + set_breakpoint_addr(dummy_funcs[i], i); + toggle_breakpoint(i, BP_X, 1, local, global, 1); + ptrace(PTRACE_CONT, child_pid, NULL, 0); + sprintf(buf, "Test breakpoint %d with local: %d global: %d\n", + i, local, global); + check_success(buf); + toggle_breakpoint(i, BP_X, 1, local, global, 0); + } +} + +static void launch_watchpoints(char *buf, int mode, int len, + int local, int global) +{ + const char *mode_str; + int i; + + if (mode == BP_W) + mode_str = "write"; + else + mode_str = "read"; + + for (i = 0; i < 4; i++) { + set_breakpoint_addr(&dummy_var[i], i); + toggle_breakpoint(i, mode, len, local, global, 1); + ptrace(PTRACE_CONT, child_pid, NULL, 0); + sprintf(buf, + "Test %s watchpoint %d with len: %d local: %d global: %d\n", + mode_str, i, len, local, global); + check_success(buf); + toggle_breakpoint(i, mode, len, local, global, 0); + } +} + +/* Set the breakpoints and check the child successfully trigger them */ +static void launch_tests(void) +{ + char buf[1024]; + int len, local, global, i; + + /* Instruction breakpoints */ + for (local = 0; local < 2; local++) { + for (global = 0; global < 2; global++) { + if (!local && !global) + continue; + launch_instruction_breakpoints(buf, local, global); + } + } + + /* Write watchpoint */ + for (len = 1; len <= sizeof(long); len <<= 1) { + for (local = 0; local < 2; local++) { + for (global = 0; global < 2; global++) { + if (!local && !global) + continue; + launch_watchpoints(buf, BP_W, len, + local, global); + } + } + } + + /* Read-Write watchpoint */ + for (len = 1; len <= sizeof(long); len <<= 1) { + for (local = 0; local < 2; local++) { + for (global = 0; global < 2; global++) { + if (!local && !global) + continue; + launch_watchpoints(buf, BP_RW, len, + local, global); + } + } + } + + /* Icebp traps */ + ptrace(PTRACE_CONT, child_pid, NULL, 0); + check_success("Test icebp\n"); + + /* Int 3 traps */ + ptrace(PTRACE_CONT, child_pid, NULL, 0); + check_success("Test int 3 trap\n"); + + ptrace(PTRACE_CONT, child_pid, NULL, 0); +} + +int main(int argc, char **argv) +{ + pid_t pid; + int ret; + + ksft_print_header(); + + pid = fork(); + if (!pid) { + trigger_tests(); + exit(0); + } + + child_pid = pid; + + wait(NULL); + + launch_tests(); + + wait(NULL); + + ksft_exit_pass(); +} diff --git a/tools/testing/selftests/breakpoints/breakpoint_test_arm64.c b/tools/testing/selftests/breakpoints/breakpoint_test_arm64.c new file mode 100644 index 000000000..2d95e5add --- /dev/null +++ b/tools/testing/selftests/breakpoints/breakpoint_test_arm64.c @@ -0,0 +1,258 @@ +/* + * Copyright (C) 2016 Google, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * Original Code by Pavel Labath <labath@google.com> + * + * Code modified by Pratyush Anand <panand@redhat.com> + * for testing different byte select for each access size. + * + */ + +#define _GNU_SOURCE + +#include <asm/ptrace.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <sys/ptrace.h> +#include <sys/param.h> +#include <sys/uio.h> +#include <stdint.h> +#include <stdbool.h> +#include <stddef.h> +#include <string.h> +#include <stdio.h> +#include <unistd.h> +#include <elf.h> +#include <errno.h> +#include <signal.h> + +#include "../kselftest.h" + +static volatile uint8_t var[96] __attribute__((__aligned__(32))); + +static void child(int size, int wr) +{ + volatile uint8_t *addr = &var[32 + wr]; + + if (ptrace(PTRACE_TRACEME, 0, NULL, NULL) != 0) { + ksft_print_msg( + "ptrace(PTRACE_TRACEME) failed: %s\n", + strerror(errno)); + _exit(1); + } + + if (raise(SIGSTOP) != 0) { + ksft_print_msg( + "raise(SIGSTOP) failed: %s\n", strerror(errno)); + _exit(1); + } + + if ((uintptr_t) addr % size) { + ksft_print_msg( + "Wrong address write for the given size: %s\n", + strerror(errno)); + _exit(1); + } + + switch (size) { + case 1: + *addr = 47; + break; + case 2: + *(uint16_t *)addr = 47; + break; + case 4: + *(uint32_t *)addr = 47; + break; + case 8: + *(uint64_t *)addr = 47; + break; + case 16: + __asm__ volatile ("stp x29, x30, %0" : "=m" (addr[0])); + break; + case 32: + __asm__ volatile ("stp q29, q30, %0" : "=m" (addr[0])); + break; + } + + _exit(0); +} + +static bool set_watchpoint(pid_t pid, int size, int wp) +{ + const volatile uint8_t *addr = &var[32 + wp]; + const int offset = (uintptr_t)addr % 8; + const unsigned int byte_mask = ((1 << size) - 1) << offset; + const unsigned int type = 2; /* Write */ + const unsigned int enable = 1; + const unsigned int control = byte_mask << 5 | type << 3 | enable; + struct user_hwdebug_state dreg_state; + struct iovec iov; + + memset(&dreg_state, 0, sizeof(dreg_state)); + dreg_state.dbg_regs[0].addr = (uintptr_t)(addr - offset); + dreg_state.dbg_regs[0].ctrl = control; + iov.iov_base = &dreg_state; + iov.iov_len = offsetof(struct user_hwdebug_state, dbg_regs) + + sizeof(dreg_state.dbg_regs[0]); + if (ptrace(PTRACE_SETREGSET, pid, NT_ARM_HW_WATCH, &iov) == 0) + return true; + + if (errno == EIO) + ksft_print_msg( + "ptrace(PTRACE_SETREGSET, NT_ARM_HW_WATCH) not supported on this hardware: %s\n", + strerror(errno)); + + ksft_print_msg( + "ptrace(PTRACE_SETREGSET, NT_ARM_HW_WATCH) failed: %s\n", + strerror(errno)); + return false; +} + +static bool run_test(int wr_size, int wp_size, int wr, int wp) +{ + int status; + siginfo_t siginfo; + pid_t pid = fork(); + pid_t wpid; + + if (pid < 0) { + ksft_test_result_fail( + "fork() failed: %s\n", strerror(errno)); + return false; + } + if (pid == 0) + child(wr_size, wr); + + wpid = waitpid(pid, &status, __WALL); + if (wpid != pid) { + ksft_print_msg( + "waitpid() failed: %s\n", strerror(errno)); + return false; + } + if (!WIFSTOPPED(status)) { + ksft_print_msg( + "child did not stop: %s\n", strerror(errno)); + return false; + } + if (WSTOPSIG(status) != SIGSTOP) { + ksft_print_msg("child did not stop with SIGSTOP\n"); + return false; + } + + if (!set_watchpoint(pid, wp_size, wp)) + return false; + + if (ptrace(PTRACE_CONT, pid, NULL, NULL) < 0) { + ksft_print_msg( + "ptrace(PTRACE_SINGLESTEP) failed: %s\n", + strerror(errno)); + return false; + } + + alarm(3); + wpid = waitpid(pid, &status, __WALL); + if (wpid != pid) { + ksft_print_msg( + "waitpid() failed: %s\n", strerror(errno)); + return false; + } + alarm(0); + if (WIFEXITED(status)) { + ksft_print_msg("child did not single-step\n"); + return false; + } + if (!WIFSTOPPED(status)) { + ksft_print_msg("child did not stop\n"); + return false; + } + if (WSTOPSIG(status) != SIGTRAP) { + ksft_print_msg("child did not stop with SIGTRAP\n"); + return false; + } + if (ptrace(PTRACE_GETSIGINFO, pid, NULL, &siginfo) != 0) { + ksft_print_msg( + "ptrace(PTRACE_GETSIGINFO): %s\n", + strerror(errno)); + return false; + } + if (siginfo.si_code != TRAP_HWBKPT) { + ksft_print_msg( + "Unexpected si_code %d\n", siginfo.si_code); + return false; + } + + kill(pid, SIGKILL); + wpid = waitpid(pid, &status, 0); + if (wpid != pid) { + ksft_print_msg( + "waitpid() failed: %s\n", strerror(errno)); + return false; + } + return true; +} + +static void sigalrm(int sig) +{ +} + +int main(int argc, char **argv) +{ + int opt; + bool succeeded = true; + struct sigaction act; + int wr, wp, size; + bool result; + + ksft_print_header(); + + act.sa_handler = sigalrm; + sigemptyset(&act.sa_mask); + act.sa_flags = 0; + sigaction(SIGALRM, &act, NULL); + for (size = 1; size <= 32; size = size*2) { + for (wr = 0; wr <= 32; wr = wr + size) { + for (wp = wr - size; wp <= wr + size; wp = wp + size) { + result = run_test(size, MIN(size, 8), wr, wp); + if ((result && wr == wp) || + (!result && wr != wp)) + ksft_test_result_pass( + "Test size = %d write offset = %d watchpoint offset = %d\n", + size, wr, wp); + else { + ksft_test_result_fail( + "Test size = %d write offset = %d watchpoint offset = %d\n", + size, wr, wp); + succeeded = false; + } + } + } + } + + for (size = 1; size <= 32; size = size*2) { + if (run_test(size, 8, -size, -8)) + ksft_test_result_pass( + "Test size = %d write offset = %d watchpoint offset = -8\n", + size, -size); + else { + ksft_test_result_fail( + "Test size = %d write offset = %d watchpoint offset = -8\n", + size, -size); + succeeded = false; + } + } + + if (succeeded) + ksft_exit_pass(); + else + ksft_exit_fail(); +} diff --git a/tools/testing/selftests/breakpoints/step_after_suspend_test.c b/tools/testing/selftests/breakpoints/step_after_suspend_test.c new file mode 100644 index 000000000..f82dcc1f8 --- /dev/null +++ b/tools/testing/selftests/breakpoints/step_after_suspend_test.c @@ -0,0 +1,220 @@ +/* + * Copyright (C) 2016 Google, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#define _GNU_SOURCE + +#include <errno.h> +#include <fcntl.h> +#include <sched.h> +#include <signal.h> +#include <stdbool.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <sys/ptrace.h> +#include <sys/stat.h> +#include <sys/timerfd.h> +#include <sys/types.h> +#include <sys/wait.h> + +#include "../kselftest.h" + +void child(int cpu) +{ + cpu_set_t set; + + CPU_ZERO(&set); + CPU_SET(cpu, &set); + if (sched_setaffinity(0, sizeof(set), &set) != 0) { + ksft_print_msg("sched_setaffinity() failed: %s\n", + strerror(errno)); + _exit(1); + } + + if (ptrace(PTRACE_TRACEME, 0, NULL, NULL) != 0) { + ksft_print_msg("ptrace(PTRACE_TRACEME) failed: %s\n", + strerror(errno)); + _exit(1); + } + + if (raise(SIGSTOP) != 0) { + ksft_print_msg("raise(SIGSTOP) failed: %s\n", strerror(errno)); + _exit(1); + } + + _exit(0); +} + +bool run_test(int cpu) +{ + int status; + pid_t pid = fork(); + pid_t wpid; + + if (pid < 0) { + ksft_print_msg("fork() failed: %s\n", strerror(errno)); + return false; + } + if (pid == 0) + child(cpu); + + wpid = waitpid(pid, &status, __WALL); + if (wpid != pid) { + ksft_print_msg("waitpid() failed: %s\n", strerror(errno)); + return false; + } + if (!WIFSTOPPED(status)) { + ksft_print_msg("child did not stop: %s\n", strerror(errno)); + return false; + } + if (WSTOPSIG(status) != SIGSTOP) { + ksft_print_msg("child did not stop with SIGSTOP: %s\n", + strerror(errno)); + return false; + } + + if (ptrace(PTRACE_SINGLESTEP, pid, NULL, NULL) < 0) { + if (errno == EIO) { + ksft_exit_skip( + "ptrace(PTRACE_SINGLESTEP) not supported on this architecture: %s\n", + strerror(errno)); + } + ksft_print_msg("ptrace(PTRACE_SINGLESTEP) failed: %s\n", + strerror(errno)); + return false; + } + + wpid = waitpid(pid, &status, __WALL); + if (wpid != pid) { + ksft_print_msg("waitpid() failed: $s\n", strerror(errno)); + return false; + } + if (WIFEXITED(status)) { + ksft_print_msg("child did not single-step: %s\n", + strerror(errno)); + return false; + } + if (!WIFSTOPPED(status)) { + ksft_print_msg("child did not stop: %s\n", strerror(errno)); + return false; + } + if (WSTOPSIG(status) != SIGTRAP) { + ksft_print_msg("child did not stop with SIGTRAP: %s\n", + strerror(errno)); + return false; + } + + if (ptrace(PTRACE_CONT, pid, NULL, NULL) < 0) { + ksft_print_msg("ptrace(PTRACE_CONT) failed: %s\n", + strerror(errno)); + return false; + } + + wpid = waitpid(pid, &status, __WALL); + if (wpid != pid) { + ksft_print_msg("waitpid() failed: %s\n", strerror(errno)); + return false; + } + if (!WIFEXITED(status)) { + ksft_print_msg("child did not exit after PTRACE_CONT: %s\n", + strerror(errno)); + return false; + } + + return true; +} + +void suspend(void) +{ + int power_state_fd; + struct sigevent event = {}; + int timerfd; + int err; + struct itimerspec spec = {}; + + if (getuid() != 0) + ksft_exit_skip("Please run the test as root - Exiting.\n"); + + power_state_fd = open("/sys/power/state", O_RDWR); + if (power_state_fd < 0) + ksft_exit_fail_msg( + "open(\"/sys/power/state\") failed %s)\n", + strerror(errno)); + + timerfd = timerfd_create(CLOCK_BOOTTIME_ALARM, 0); + if (timerfd < 0) + ksft_exit_fail_msg("timerfd_create() failed\n"); + + spec.it_value.tv_sec = 5; + err = timerfd_settime(timerfd, 0, &spec, NULL); + if (err < 0) + ksft_exit_fail_msg("timerfd_settime() failed\n"); + + if (write(power_state_fd, "mem", strlen("mem")) != strlen("mem")) + ksft_exit_fail_msg("Failed to enter Suspend state\n"); + + close(timerfd); + close(power_state_fd); +} + +int main(int argc, char **argv) +{ + int opt; + bool do_suspend = true; + bool succeeded = true; + cpu_set_t available_cpus; + int err; + int cpu; + + ksft_print_header(); + + while ((opt = getopt(argc, argv, "n")) != -1) { + switch (opt) { + case 'n': + do_suspend = false; + break; + default: + printf("Usage: %s [-n]\n", argv[0]); + printf(" -n: do not trigger a suspend/resume cycle before the test\n"); + return -1; + } + } + + if (do_suspend) + suspend(); + + err = sched_getaffinity(0, sizeof(available_cpus), &available_cpus); + if (err < 0) + ksft_exit_fail_msg("sched_getaffinity() failed\n"); + + for (cpu = 0; cpu < CPU_SETSIZE; cpu++) { + bool test_success; + + if (!CPU_ISSET(cpu, &available_cpus)) + continue; + + test_success = run_test(cpu); + if (test_success) { + ksft_test_result_pass("CPU %d\n", cpu); + } else { + ksft_test_result_fail("CPU %d\n", cpu); + succeeded = false; + } + } + + if (succeeded) + ksft_exit_pass(); + else + ksft_exit_fail(); +} |