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s390/module: test loading modules with a lot of relocations

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Add a test in order to prevent regressions.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Ilya Leoshkevich 2022-01-19 19:26:38 +01:00 committed by Heiko Carstens
parent f3b7e73b2c
commit 90c5318795
5 changed files with 116 additions and 0 deletions
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15
arch/s390/Kconfig
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@ -945,6 +945,9 @@ config S390_GUEST
endmenu
config S390_MODULES_SANITY_TEST_HELPERS
def_bool n
menu "Selftests"
config S390_UNWIND_SELFTEST
@ -971,4 +974,16 @@ config S390_KPROBES_SANITY_TEST
Say N if you are unsure.
config S390_MODULES_SANITY_TEST
def_tristate n
depends on KUNIT
default KUNIT_ALL_TESTS
prompt "Enable s390 specific modules tests"
select S390_MODULES_SANITY_TEST_HELPERS
help
This option enables an s390 specific modules test. This option is
not useful for distributions or general kernels, but only for
kernel developers working on architecture code.
Say N if you are unsure.
endmenu

3
arch/s390/lib/Makefile
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@ -17,4 +17,7 @@ KASAN_SANITIZE_uaccess.o := n
obj-$(CONFIG_S390_UNWIND_SELFTEST) += test_unwind.o
CFLAGS_test_unwind.o += -fno-optimize-sibling-calls
obj-$(CONFIG_S390_MODULES_SANITY_TEST) += test_modules.o
obj-$(CONFIG_S390_MODULES_SANITY_TEST_HELPERS) += test_modules_helpers.o
lib-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o

35
arch/s390/lib/test_modules.c Normal file
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@ -0,0 +1,35 @@
// SPDX-License-Identifier: GPL-2.0+
#include <kunit/test.h>
#include <linux/module.h>
#include "test_modules.h"
#define DECLARE_RETURN(i) int test_modules_return_ ## i(void)
REPEAT_10000(DECLARE_RETURN);
/*
* Test that modules with many relocations are loaded properly.
*/
static void test_modules_many_vmlinux_relocs(struct kunit *test)
{
int result = 0;
#define CALL_RETURN(i) result += test_modules_return_ ## i()
REPEAT_10000(CALL_RETURN);
KUNIT_ASSERT_EQ(test, result, 49995000);
}
static struct kunit_case modules_testcases[] = {
KUNIT_CASE(test_modules_many_vmlinux_relocs),
{}
};
static struct kunit_suite modules_test_suite = {
.name = "modules_test_s390",
.test_cases = modules_testcases,
};
kunit_test_suites(&modules_test_suite);
MODULE_LICENSE("GPL");

50
arch/s390/lib/test_modules.h Normal file
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@ -0,0 +1,50 @@
/* SPDX-License-Identifier: GPL-2.0+ */
#ifndef TEST_MODULES_H
#define TEST_MODULES_H
#define __REPEAT_10000_3(f, x) \
f(x ## 0); \
f(x ## 1); \
f(x ## 2); \
f(x ## 3); \
f(x ## 4); \
f(x ## 5); \
f(x ## 6); \
f(x ## 7); \
f(x ## 8); \
f(x ## 9)
#define __REPEAT_10000_2(f, x) \
__REPEAT_10000_3(f, x ## 0); \
__REPEAT_10000_3(f, x ## 1); \
__REPEAT_10000_3(f, x ## 2); \
__REPEAT_10000_3(f, x ## 3); \
__REPEAT_10000_3(f, x ## 4); \
__REPEAT_10000_3(f, x ## 5); \
__REPEAT_10000_3(f, x ## 6); \
__REPEAT_10000_3(f, x ## 7); \
__REPEAT_10000_3(f, x ## 8); \
__REPEAT_10000_3(f, x ## 9)
#define __REPEAT_10000_1(f, x) \
__REPEAT_10000_2(f, x ## 0); \
__REPEAT_10000_2(f, x ## 1); \
__REPEAT_10000_2(f, x ## 2); \
__REPEAT_10000_2(f, x ## 3); \
__REPEAT_10000_2(f, x ## 4); \
__REPEAT_10000_2(f, x ## 5); \
__REPEAT_10000_2(f, x ## 6); \
__REPEAT_10000_2(f, x ## 7); \
__REPEAT_10000_2(f, x ## 8); \
__REPEAT_10000_2(f, x ## 9)
#define REPEAT_10000(f) \
__REPEAT_10000_1(f, 0); \
__REPEAT_10000_1(f, 1); \
__REPEAT_10000_1(f, 2); \
__REPEAT_10000_1(f, 3); \
__REPEAT_10000_1(f, 4); \
__REPEAT_10000_1(f, 5); \
__REPEAT_10000_1(f, 6); \
__REPEAT_10000_1(f, 7); \
__REPEAT_10000_1(f, 8); \
__REPEAT_10000_1(f, 9)
#endif

13
arch/s390/lib/test_modules_helpers.c Normal file
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@ -0,0 +1,13 @@
// SPDX-License-Identifier: GPL-2.0+
#include <linux/export.h>
#include "test_modules.h"
#define DEFINE_RETURN(i) \
int test_modules_return_ ## i(void) \
{ \
return 1 ## i - 10000; \
} \
EXPORT_SYMBOL_GPL(test_modules_return_ ## i)
REPEAT_10000(DEFINE_RETURN);