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git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blob - lib/atomic64_test.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Testsuite for atomic64_t functions
5 * Copyright © 2010 Luca Barbieri
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/init.h>
11 #include <linux/bug.h>
12 #include <linux/kernel.h>
13 #include <linux/atomic.h>
14 #include <linux/module.h>
17 #include <asm/cpufeature.h> /* for boot_cpu_has below */
20 #define TEST(bit, op, c_op, val) \
22 atomic##bit##_set(&v, v0); \
24 atomic##bit##_##op(val, &v); \
26 WARN(atomic##bit##_read(&v) != r, "%Lx != %Lx\n", \
27 (unsigned long long)atomic##bit##_read(&v), \
28 (unsigned long long)r); \
32 * Test for a atomic operation family,
33 * @test should be a macro accepting parameters (bit, op, ...)
36 #define FAMILY_TEST(test, bit, op, args...) \
38 test(bit, op, ##args); \
39 test(bit, op##_acquire, ##args); \
40 test(bit, op##_release, ##args); \
41 test(bit, op##_relaxed, ##args); \
44 #define TEST_RETURN(bit, op, c_op, val) \
46 atomic##bit##_set(&v, v0); \
49 BUG_ON(atomic##bit##_##op(val, &v) != r); \
50 BUG_ON(atomic##bit##_read(&v) != r); \
53 #define TEST_FETCH(bit, op, c_op, val) \
55 atomic##bit##_set(&v, v0); \
58 BUG_ON(atomic##bit##_##op(val, &v) != v0); \
59 BUG_ON(atomic##bit##_read(&v) != r); \
62 #define RETURN_FAMILY_TEST(bit, op, c_op, val) \
64 FAMILY_TEST(TEST_RETURN, bit, op, c_op, val); \
67 #define FETCH_FAMILY_TEST(bit, op, c_op, val) \
69 FAMILY_TEST(TEST_FETCH, bit, op, c_op, val); \
72 #define TEST_ARGS(bit, op, init, ret, expect, args...) \
74 atomic##bit##_set(&v, init); \
75 BUG_ON(atomic##bit##_##op(&v, ##args) != ret); \
76 BUG_ON(atomic##bit##_read(&v) != expect); \
79 #define XCHG_FAMILY_TEST(bit, init, new) \
81 FAMILY_TEST(TEST_ARGS, bit, xchg, init, init, new, new); \
84 #define CMPXCHG_FAMILY_TEST(bit, init, new, wrong) \
86 FAMILY_TEST(TEST_ARGS, bit, cmpxchg, \
87 init, init, new, init, new); \
88 FAMILY_TEST(TEST_ARGS, bit, cmpxchg, \
89 init, init, init, wrong, new); \
92 #define INC_RETURN_FAMILY_TEST(bit, i) \
94 FAMILY_TEST(TEST_ARGS, bit, inc_return, \
95 i, (i) + one, (i) + one); \
98 #define DEC_RETURN_FAMILY_TEST(bit, i) \
100 FAMILY_TEST(TEST_ARGS, bit, dec_return, \
101 i, (i) - one, (i) - one); \
104 static __init
void test_atomic(void)
108 int onestwos
= 0x11112222;
114 TEST(, add
, +=, onestwos
);
115 TEST(, add
, +=, -one
);
116 TEST(, sub
, -=, onestwos
);
117 TEST(, sub
, -=, -one
);
121 TEST(, andnot
, &= ~, v1
);
123 RETURN_FAMILY_TEST(, add_return
, +=, onestwos
);
124 RETURN_FAMILY_TEST(, add_return
, +=, -one
);
125 RETURN_FAMILY_TEST(, sub_return
, -=, onestwos
);
126 RETURN_FAMILY_TEST(, sub_return
, -=, -one
);
128 FETCH_FAMILY_TEST(, fetch_add
, +=, onestwos
);
129 FETCH_FAMILY_TEST(, fetch_add
, +=, -one
);
130 FETCH_FAMILY_TEST(, fetch_sub
, -=, onestwos
);
131 FETCH_FAMILY_TEST(, fetch_sub
, -=, -one
);
133 FETCH_FAMILY_TEST(, fetch_or
, |=, v1
);
134 FETCH_FAMILY_TEST(, fetch_and
, &=, v1
);
135 FETCH_FAMILY_TEST(, fetch_andnot
, &= ~, v1
);
136 FETCH_FAMILY_TEST(, fetch_xor
, ^=, v1
);
138 INC_RETURN_FAMILY_TEST(, v0
);
139 DEC_RETURN_FAMILY_TEST(, v0
);
141 XCHG_FAMILY_TEST(, v0
, v1
);
142 CMPXCHG_FAMILY_TEST(, v0
, v1
, onestwos
);
146 #define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
147 static __init
void test_atomic64(void)
149 long long v0
= 0xaaa31337c001d00dLL
;
150 long long v1
= 0xdeadbeefdeafcafeLL
;
151 long long v2
= 0xfaceabadf00df001LL
;
152 long long v3
= 0x8000000000000000LL
;
153 long long onestwos
= 0x1111111122222222LL
;
157 atomic64_t v
= ATOMIC64_INIT(v0
);
159 BUG_ON(v
.counter
!= r
);
161 atomic64_set(&v
, v1
);
163 BUG_ON(v
.counter
!= r
);
164 BUG_ON(atomic64_read(&v
) != r
);
166 TEST(64, add
, +=, onestwos
);
167 TEST(64, add
, +=, -one
);
168 TEST(64, sub
, -=, onestwos
);
169 TEST(64, sub
, -=, -one
);
170 TEST(64, or, |=, v1
);
171 TEST(64, and, &=, v1
);
172 TEST(64, xor, ^=, v1
);
173 TEST(64, andnot
, &= ~, v1
);
175 RETURN_FAMILY_TEST(64, add_return
, +=, onestwos
);
176 RETURN_FAMILY_TEST(64, add_return
, +=, -one
);
177 RETURN_FAMILY_TEST(64, sub_return
, -=, onestwos
);
178 RETURN_FAMILY_TEST(64, sub_return
, -=, -one
);
180 FETCH_FAMILY_TEST(64, fetch_add
, +=, onestwos
);
181 FETCH_FAMILY_TEST(64, fetch_add
, +=, -one
);
182 FETCH_FAMILY_TEST(64, fetch_sub
, -=, onestwos
);
183 FETCH_FAMILY_TEST(64, fetch_sub
, -=, -one
);
185 FETCH_FAMILY_TEST(64, fetch_or
, |=, v1
);
186 FETCH_FAMILY_TEST(64, fetch_and
, &=, v1
);
187 FETCH_FAMILY_TEST(64, fetch_andnot
, &= ~, v1
);
188 FETCH_FAMILY_TEST(64, fetch_xor
, ^=, v1
);
193 BUG_ON(v
.counter
!= r
);
198 BUG_ON(v
.counter
!= r
);
200 INC_RETURN_FAMILY_TEST(64, v0
);
201 DEC_RETURN_FAMILY_TEST(64, v0
);
203 XCHG_FAMILY_TEST(64, v0
, v1
);
204 CMPXCHG_FAMILY_TEST(64, v0
, v1
, v2
);
207 BUG_ON(atomic64_add_unless(&v
, one
, v0
));
208 BUG_ON(v
.counter
!= r
);
211 BUG_ON(!atomic64_add_unless(&v
, one
, v1
));
213 BUG_ON(v
.counter
!= r
);
216 BUG_ON(atomic64_dec_if_positive(&v
) != (onestwos
- 1));
218 BUG_ON(v
.counter
!= r
);
221 BUG_ON(atomic64_dec_if_positive(&v
) != -one
);
222 BUG_ON(v
.counter
!= r
);
225 BUG_ON(atomic64_dec_if_positive(&v
) != (-one
- one
));
226 BUG_ON(v
.counter
!= r
);
229 BUG_ON(!atomic64_inc_not_zero(&v
));
231 BUG_ON(v
.counter
!= r
);
234 BUG_ON(atomic64_inc_not_zero(&v
));
235 BUG_ON(v
.counter
!= r
);
238 BUG_ON(!atomic64_inc_not_zero(&v
));
240 BUG_ON(v
.counter
!= r
);
242 /* Confirm the return value fits in an int, even if the value doesn't */
244 r_int
= atomic64_inc_not_zero(&v
);
248 static __init
int test_atomics_init(void)
254 pr_info("passed for %s platform %s CX8 and %s SSE\n",
257 #elif defined(CONFIG_X86_CMPXCHG64)
262 boot_cpu_has(X86_FEATURE_CX8
) ? "with" : "without",
263 boot_cpu_has(X86_FEATURE_XMM
) ? "with" : "without");
271 static __exit
void test_atomics_exit(void) {}
273 module_init(test_atomics_init
);
274 module_exit(test_atomics_exit
);
276 MODULE_LICENSE("GPL");