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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
86a89380 LB |
2 | /* |
3 | * Testsuite for atomic64_t functions | |
4 | * | |
5 | * Copyright © 2010 Luca Barbieri | |
86a89380 | 6 | */ |
b3b16d28 FF |
7 | |
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
9 | ||
86a89380 | 10 | #include <linux/init.h> |
50af5ead | 11 | #include <linux/bug.h> |
0dbdd1bf | 12 | #include <linux/kernel.h> |
60063497 | 13 | #include <linux/atomic.h> |
55ded955 | 14 | #include <linux/module.h> |
86a89380 | 15 | |
153a4334 | 16 | #ifdef CONFIG_X86 |
cd4d09ec | 17 | #include <asm/cpufeature.h> /* for boot_cpu_has below */ |
153a4334 AK |
18 | #endif |
19 | ||
41b9e9fc PZ |
20 | #define TEST(bit, op, c_op, val) \ |
21 | do { \ | |
22 | atomic##bit##_set(&v, v0); \ | |
23 | r = v0; \ | |
24 | atomic##bit##_##op(val, &v); \ | |
25 | r c_op val; \ | |
26 | WARN(atomic##bit##_read(&v) != r, "%Lx != %Lx\n", \ | |
27 | (unsigned long long)atomic##bit##_read(&v), \ | |
28 | (unsigned long long)r); \ | |
29 | } while (0) | |
30 | ||
978e5a36 BF |
31 | /* |
32 | * Test for a atomic operation family, | |
33 | * @test should be a macro accepting parameters (bit, op, ...) | |
34 | */ | |
35 | ||
36 | #define FAMILY_TEST(test, bit, op, args...) \ | |
37 | do { \ | |
38 | test(bit, op, ##args); \ | |
39 | test(bit, op##_acquire, ##args); \ | |
40 | test(bit, op##_release, ##args); \ | |
41 | test(bit, op##_relaxed, ##args); \ | |
42 | } while (0) | |
43 | ||
44 | #define TEST_RETURN(bit, op, c_op, val) \ | |
45 | do { \ | |
46 | atomic##bit##_set(&v, v0); \ | |
47 | r = v0; \ | |
48 | r c_op val; \ | |
49 | BUG_ON(atomic##bit##_##op(val, &v) != r); \ | |
50 | BUG_ON(atomic##bit##_read(&v) != r); \ | |
51 | } while (0) | |
52 | ||
28aa2bda PZ |
53 | #define TEST_FETCH(bit, op, c_op, val) \ |
54 | do { \ | |
55 | atomic##bit##_set(&v, v0); \ | |
56 | r = v0; \ | |
57 | r c_op val; \ | |
58 | BUG_ON(atomic##bit##_##op(val, &v) != v0); \ | |
59 | BUG_ON(atomic##bit##_read(&v) != r); \ | |
60 | } while (0) | |
61 | ||
978e5a36 BF |
62 | #define RETURN_FAMILY_TEST(bit, op, c_op, val) \ |
63 | do { \ | |
64 | FAMILY_TEST(TEST_RETURN, bit, op, c_op, val); \ | |
65 | } while (0) | |
66 | ||
28aa2bda PZ |
67 | #define FETCH_FAMILY_TEST(bit, op, c_op, val) \ |
68 | do { \ | |
69 | FAMILY_TEST(TEST_FETCH, bit, op, c_op, val); \ | |
70 | } while (0) | |
71 | ||
978e5a36 BF |
72 | #define TEST_ARGS(bit, op, init, ret, expect, args...) \ |
73 | do { \ | |
74 | atomic##bit##_set(&v, init); \ | |
75 | BUG_ON(atomic##bit##_##op(&v, ##args) != ret); \ | |
76 | BUG_ON(atomic##bit##_read(&v) != expect); \ | |
77 | } while (0) | |
78 | ||
79 | #define XCHG_FAMILY_TEST(bit, init, new) \ | |
80 | do { \ | |
81 | FAMILY_TEST(TEST_ARGS, bit, xchg, init, init, new, new); \ | |
82 | } while (0) | |
83 | ||
84 | #define CMPXCHG_FAMILY_TEST(bit, init, new, wrong) \ | |
85 | do { \ | |
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); \ | |
90 | } while (0) | |
91 | ||
92 | #define INC_RETURN_FAMILY_TEST(bit, i) \ | |
93 | do { \ | |
94 | FAMILY_TEST(TEST_ARGS, bit, inc_return, \ | |
95 | i, (i) + one, (i) + one); \ | |
96 | } while (0) | |
97 | ||
98 | #define DEC_RETURN_FAMILY_TEST(bit, i) \ | |
99 | do { \ | |
100 | FAMILY_TEST(TEST_ARGS, bit, dec_return, \ | |
101 | i, (i) - one, (i) - one); \ | |
102 | } while (0) | |
103 | ||
41b9e9fc PZ |
104 | static __init void test_atomic(void) |
105 | { | |
106 | int v0 = 0xaaa31337; | |
107 | int v1 = 0xdeadbeef; | |
108 | int onestwos = 0x11112222; | |
109 | int one = 1; | |
110 | ||
111 | atomic_t v; | |
112 | int r; | |
113 | ||
114 | TEST(, add, +=, onestwos); | |
115 | TEST(, add, +=, -one); | |
116 | TEST(, sub, -=, onestwos); | |
117 | TEST(, sub, -=, -one); | |
118 | TEST(, or, |=, v1); | |
119 | TEST(, and, &=, v1); | |
120 | TEST(, xor, ^=, v1); | |
121 | TEST(, andnot, &= ~, v1); | |
978e5a36 BF |
122 | |
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); | |
127 | ||
28aa2bda PZ |
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); | |
132 | ||
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); | |
137 | ||
978e5a36 BF |
138 | INC_RETURN_FAMILY_TEST(, v0); |
139 | DEC_RETURN_FAMILY_TEST(, v0); | |
140 | ||
141 | XCHG_FAMILY_TEST(, v0, v1); | |
142 | CMPXCHG_FAMILY_TEST(, v0, v1, onestwos); | |
143 | ||
41b9e9fc PZ |
144 | } |
145 | ||
86a89380 | 146 | #define INIT(c) do { atomic64_set(&v, c); r = c; } while (0) |
41b9e9fc | 147 | static __init void test_atomic64(void) |
86a89380 LB |
148 | { |
149 | long long v0 = 0xaaa31337c001d00dLL; | |
150 | long long v1 = 0xdeadbeefdeafcafeLL; | |
151 | long long v2 = 0xfaceabadf00df001LL; | |
ffba19cc | 152 | long long v3 = 0x8000000000000000LL; |
86a89380 LB |
153 | long long onestwos = 0x1111111122222222LL; |
154 | long long one = 1LL; | |
ffba19cc | 155 | int r_int; |
86a89380 LB |
156 | |
157 | atomic64_t v = ATOMIC64_INIT(v0); | |
158 | long long r = v0; | |
159 | BUG_ON(v.counter != r); | |
160 | ||
161 | atomic64_set(&v, v1); | |
162 | r = v1; | |
163 | BUG_ON(v.counter != r); | |
164 | BUG_ON(atomic64_read(&v) != r); | |
165 | ||
41b9e9fc PZ |
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); | |
86a89380 | 174 | |
978e5a36 BF |
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); | |
86a89380 | 179 | |
28aa2bda PZ |
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); | |
184 | ||
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); | |
189 | ||
86a89380 LB |
190 | INIT(v0); |
191 | atomic64_inc(&v); | |
192 | r += one; | |
193 | BUG_ON(v.counter != r); | |
194 | ||
86a89380 LB |
195 | INIT(v0); |
196 | atomic64_dec(&v); | |
197 | r -= one; | |
198 | BUG_ON(v.counter != r); | |
199 | ||
978e5a36 BF |
200 | INC_RETURN_FAMILY_TEST(64, v0); |
201 | DEC_RETURN_FAMILY_TEST(64, v0); | |
86a89380 | 202 | |
978e5a36 BF |
203 | XCHG_FAMILY_TEST(64, v0, v1); |
204 | CMPXCHG_FAMILY_TEST(64, v0, v1, v2); | |
86a89380 LB |
205 | |
206 | INIT(v0); | |
9efbcd59 | 207 | BUG_ON(atomic64_add_unless(&v, one, v0)); |
86a89380 LB |
208 | BUG_ON(v.counter != r); |
209 | ||
210 | INIT(v0); | |
9efbcd59 | 211 | BUG_ON(!atomic64_add_unless(&v, one, v1)); |
86a89380 LB |
212 | r += one; |
213 | BUG_ON(v.counter != r); | |
214 | ||
215 | INIT(onestwos); | |
216 | BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1)); | |
217 | r -= one; | |
218 | BUG_ON(v.counter != r); | |
219 | ||
220 | INIT(0); | |
221 | BUG_ON(atomic64_dec_if_positive(&v) != -one); | |
222 | BUG_ON(v.counter != r); | |
223 | ||
224 | INIT(-one); | |
225 | BUG_ON(atomic64_dec_if_positive(&v) != (-one - one)); | |
226 | BUG_ON(v.counter != r); | |
227 | ||
228 | INIT(onestwos); | |
25a304f2 | 229 | BUG_ON(!atomic64_inc_not_zero(&v)); |
86a89380 LB |
230 | r += one; |
231 | BUG_ON(v.counter != r); | |
232 | ||
233 | INIT(0); | |
25a304f2 | 234 | BUG_ON(atomic64_inc_not_zero(&v)); |
86a89380 LB |
235 | BUG_ON(v.counter != r); |
236 | ||
237 | INIT(-one); | |
25a304f2 | 238 | BUG_ON(!atomic64_inc_not_zero(&v)); |
86a89380 LB |
239 | r += one; |
240 | BUG_ON(v.counter != r); | |
ffba19cc ME |
241 | |
242 | /* Confirm the return value fits in an int, even if the value doesn't */ | |
243 | INIT(v3); | |
244 | r_int = atomic64_inc_not_zero(&v); | |
245 | BUG_ON(!r_int); | |
41b9e9fc PZ |
246 | } |
247 | ||
55ded955 | 248 | static __init int test_atomics_init(void) |
41b9e9fc PZ |
249 | { |
250 | test_atomic(); | |
251 | test_atomic64(); | |
86a89380 LB |
252 | |
253 | #ifdef CONFIG_X86 | |
b3b16d28 | 254 | pr_info("passed for %s platform %s CX8 and %s SSE\n", |
a5c9161f | 255 | #ifdef CONFIG_X86_64 |
b3b16d28 | 256 | "x86-64", |
a5c9161f | 257 | #elif defined(CONFIG_X86_CMPXCHG64) |
b3b16d28 | 258 | "i586+", |
86a89380 | 259 | #else |
b3b16d28 | 260 | "i386+", |
86a89380 | 261 | #endif |
a5c9161f PA |
262 | boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without", |
263 | boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without"); | |
86a89380 | 264 | #else |
b3b16d28 | 265 | pr_info("passed\n"); |
86a89380 LB |
266 | #endif |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
55ded955 GU |
271 | static __exit void test_atomics_exit(void) {} |
272 | ||
273 | module_init(test_atomics_init); | |
274 | module_exit(test_atomics_exit); | |
275 | ||
276 | MODULE_LICENSE("GPL"); |