1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * tools/testing/selftests/kvm/include/test_util.h
4  *
5  * Copyright (C) 2018, Google LLC.
6  */
7 
8 #ifndef SELFTEST_KVM_TEST_UTIL_H
9 #define SELFTEST_KVM_TEST_UTIL_H
10 
11 #include <stdlib.h>
12 #include <stdarg.h>
13 #include <stdbool.h>
14 #include <stdio.h>
15 #include <string.h>
16 #include <inttypes.h>
17 #include <errno.h>
18 #include <unistd.h>
19 #include <fcntl.h>
20 #include <sys/mman.h>
21 #include "kselftest.h"
22 
23 static inline int _no_printf(const char *format, ...) { return 0; }
24 
25 #ifdef DEBUG
26 #define pr_debug(...) printf(__VA_ARGS__)
27 #else
28 #define pr_debug(...) _no_printf(__VA_ARGS__)
29 #endif
30 #ifndef QUIET
31 #define pr_info(...) printf(__VA_ARGS__)
32 #else
33 #define pr_info(...) _no_printf(__VA_ARGS__)
34 #endif
35 
36 void print_skip(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
37 
38 ssize_t test_write(int fd, const void *buf, size_t count);
39 ssize_t test_read(int fd, void *buf, size_t count);
40 int test_seq_read(const char *path, char **bufp, size_t *sizep);
41 
42 void test_assert(bool exp, const char *exp_str,
43 		 const char *file, unsigned int line, const char *fmt, ...)
44 		__attribute__((format(printf, 5, 6)));
45 
46 #define TEST_ASSERT(e, fmt, ...) \
47 	test_assert((e), #e, __FILE__, __LINE__, fmt, ##__VA_ARGS__)
48 
49 #define ASSERT_EQ(a, b) do { \
50 	typeof(a) __a = (a); \
51 	typeof(b) __b = (b); \
52 	TEST_ASSERT(__a == __b, \
53 		    "ASSERT_EQ(%s, %s) failed.\n" \
54 		    "\t%s is %#lx\n" \
55 		    "\t%s is %#lx", \
56 		    #a, #b, #a, (unsigned long) __a, #b, (unsigned long) __b); \
57 } while (0)
58 
59 #define TEST_FAIL(fmt, ...) \
60 	TEST_ASSERT(false, fmt, ##__VA_ARGS__)
61 
62 size_t parse_size(const char *size);
63 
64 int64_t timespec_to_ns(struct timespec ts);
65 struct timespec timespec_add_ns(struct timespec ts, int64_t ns);
66 struct timespec timespec_add(struct timespec ts1, struct timespec ts2);
67 struct timespec timespec_sub(struct timespec ts1, struct timespec ts2);
68 struct timespec timespec_elapsed(struct timespec start);
69 struct timespec timespec_div(struct timespec ts, int divisor);
70 
71 enum vm_mem_backing_src_type {
72 	VM_MEM_SRC_ANONYMOUS,
73 	VM_MEM_SRC_ANONYMOUS_THP,
74 	VM_MEM_SRC_ANONYMOUS_HUGETLB,
75 	VM_MEM_SRC_ANONYMOUS_HUGETLB_16KB,
76 	VM_MEM_SRC_ANONYMOUS_HUGETLB_64KB,
77 	VM_MEM_SRC_ANONYMOUS_HUGETLB_512KB,
78 	VM_MEM_SRC_ANONYMOUS_HUGETLB_1MB,
79 	VM_MEM_SRC_ANONYMOUS_HUGETLB_2MB,
80 	VM_MEM_SRC_ANONYMOUS_HUGETLB_8MB,
81 	VM_MEM_SRC_ANONYMOUS_HUGETLB_16MB,
82 	VM_MEM_SRC_ANONYMOUS_HUGETLB_32MB,
83 	VM_MEM_SRC_ANONYMOUS_HUGETLB_256MB,
84 	VM_MEM_SRC_ANONYMOUS_HUGETLB_512MB,
85 	VM_MEM_SRC_ANONYMOUS_HUGETLB_1GB,
86 	VM_MEM_SRC_ANONYMOUS_HUGETLB_2GB,
87 	VM_MEM_SRC_ANONYMOUS_HUGETLB_16GB,
88 	VM_MEM_SRC_SHMEM,
89 	VM_MEM_SRC_SHARED_HUGETLB,
90 	NUM_SRC_TYPES,
91 };
92 
93 #define DEFAULT_VM_MEM_SRC VM_MEM_SRC_ANONYMOUS
94 
95 struct vm_mem_backing_src_alias {
96 	const char *name;
97 	uint32_t flag;
98 };
99 
100 #define MIN_RUN_DELAY_NS	200000UL
101 
102 bool thp_configured(void);
103 size_t get_trans_hugepagesz(void);
104 size_t get_def_hugetlb_pagesz(void);
105 const struct vm_mem_backing_src_alias *vm_mem_backing_src_alias(uint32_t i);
106 size_t get_backing_src_pagesz(uint32_t i);
107 void backing_src_help(const char *flag);
108 enum vm_mem_backing_src_type parse_backing_src_type(const char *type_name);
109 long get_run_delay(void);
110 
111 /*
112  * Whether or not the given source type is shared memory (as opposed to
113  * anonymous).
114  */
115 static inline bool backing_src_is_shared(enum vm_mem_backing_src_type t)
116 {
117 	return vm_mem_backing_src_alias(t)->flag & MAP_SHARED;
118 }
119 
120 #endif /* SELFTEST_KVM_TEST_UTIL_H */
121