summaryrefslogtreecommitdiffstats
path: root/include/qemu-common.h
blob: f8622141a80b44bc9e00609d63b529d67addc0b4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477

/* Common header file that is included by all of QEMU.
 *
 * This file is supposed to be included only by .c files. No header file should
 * depend on qemu-common.h, as this would easily lead to circular header
 * dependencies.
 *
 * If a header file uses a definition from qemu-common.h, that definition
 * must be moved to a separate header file, and the header that uses it
 * must include that header.
 */
#ifndef QEMU_COMMON_H
#define QEMU_COMMON_H

#include "qemu/compiler.h"
#include "config-host.h"
#include "qemu/typedefs.h"

#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__) || defined(__ia64__)
#define WORDS_ALIGNED
#endif

#define TFR(expr) do { if ((expr) != -1) break; } while (errno == EINTR)

/* we put basic includes here to avoid repeating them in device drivers */
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdbool.h>
#include <string.h>
#include <strings.h>
#include <inttypes.h>
#include <limits.h>
#include <time.h>
#include <ctype.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <assert.h>
#include <signal.h>
#include "glib-compat.h"
#include "qemu/option.h"

#ifdef _WIN32
#include "sysemu/os-win32.h"
#endif

#ifdef CONFIG_POSIX
#include "sysemu/os-posix.h"
#endif

#ifndef O_LARGEFILE
#define O_LARGEFILE 0
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
#ifndef ENOMEDIUM
#define ENOMEDIUM ENODEV
#endif
#if !defined(ENOTSUP)
#define ENOTSUP 4096
#endif
#if !defined(ECANCELED)
#define ECANCELED 4097
#endif
#if !defined(EMEDIUMTYPE)
#define EMEDIUMTYPE 4098
#endif
#ifndef TIME_MAX
#define TIME_MAX LONG_MAX
#endif

/* HOST_LONG_BITS is the size of a native pointer in bits. */
#if UINTPTR_MAX == UINT32_MAX
# define HOST_LONG_BITS 32
#elif UINTPTR_MAX == UINT64_MAX
# define HOST_LONG_BITS 64
#else
# error Unknown pointer size
#endif

typedef int (*fprintf_function)(FILE *f, const char *fmt, ...)
    GCC_FMT_ATTR(2, 3);

#ifdef _WIN32
#define fsync _commit
#if !defined(lseek)
# define lseek _lseeki64
#endif
int qemu_ftruncate64(int, int64_t);
#if !defined(ftruncate)
# define ftruncate qemu_ftruncate64
#endif

static inline char *realpath(const char *path, char *resolved_path)
{
    _fullpath(resolved_path, path, _MAX_PATH);
    return resolved_path;
}
#endif

void cpu_ticks_init(void);

/* icount */
void configure_icount(QemuOpts *opts, Error **errp);
extern int use_icount;
extern int icount_align_option;
/* drift information for info jit command */
extern int64_t max_delay;
extern int64_t max_advance;
void dump_drift_info(FILE *f, fprintf_function cpu_fprintf);

#include "qemu/osdep.h"
#include "qemu/bswap.h"

/* FIXME: Remove NEED_CPU_H.  */
#ifdef NEED_CPU_H
#include "cpu.h"
#endif /* !defined(NEED_CPU_H) */

/* main function, renamed */
#if defined(CONFIG_COCOA)
int qemu_main(int argc, char **argv, char **envp);
#endif

void qemu_get_timedate(struct tm *tm, int offset);
int qemu_timedate_diff(struct tm *tm);

/**
 * is_help_option:
 * @s: string to test
 *
 * Check whether @s is one of the standard strings which indicate
 * that the user is asking for a list of the valid values for a
 * command option like -cpu or -M. The current accepted strings
 * are 'help' and '?'. '?' is deprecated (it is a shell wildcard
 * which makes it annoying to use in a reliable way) but provided
 * for backwards compatibility.
 *
 * Returns: true if @s is a request for a list.
 */
static inline bool is_help_option(const char *s)
{
    return !strcmp(s, "?") || !strcmp(s, "help");
}

/* cutils.c */
void pstrcpy(char *buf, int buf_size, const char *str);
void strpadcpy(char *buf, int buf_size, const char *str, char pad);
char *pstrcat(char *buf, int buf_size, const char *s);
int strstart(const char *str, const char *val, const char **ptr);
int stristart(const char *str, const char *val, const char **ptr);
int qemu_strnlen(const char *s, int max_len);
char *qemu_strsep(char **input, const char *delim);
time_t mktimegm(struct tm *tm);
int qemu_fls(int i);
int qemu_fdatasync(int fd);
int fcntl_setfl(int fd, int flag);
int qemu_parse_fd(const char *param);

int parse_uint(const char *s, unsigned long long *value, char **endptr,
               int base);
int parse_uint_full(const char *s, unsigned long long *value, int base);

/*
 * strtosz() suffixes used to specify the default treatment of an
 * argument passed to strtosz() without an explicit suffix.
 * These should be defined using upper case characters in the range
 * A-Z, as strtosz() will use qemu_toupper() on the given argument
 * prior to comparison.
 */
#define STRTOSZ_DEFSUFFIX_EB	'E'
#define STRTOSZ_DEFSUFFIX_PB	'P'
#define STRTOSZ_DEFSUFFIX_TB	'T'
#define STRTOSZ_DEFSUFFIX_GB	'G'
#define STRTOSZ_DEFSUFFIX_MB	'M'
#define STRTOSZ_DEFSUFFIX_KB	'K'
#define STRTOSZ_DEFSUFFIX_B	'B'
int64_t strtosz(const char *nptr, char **end);
int64_t strtosz_suffix(const char *nptr, char **end, const char default_suffix);
int64_t strtosz_suffix_unit(const char *nptr, char **end,
                            const char default_suffix, int64_t unit);

/* used to print char* safely */
#define STR_OR_NULL(str) ((str) ? (str) : "null")

/* id.c */
bool id_wellformed(const char *id);

/* path.c */
void init_paths(const char *prefix);
const char *path(const char *pathname);

#define qemu_isalnum(c)		isalnum((unsigned char)(c))
#define qemu_isalpha(c)		isalpha((unsigned char)(c))
#define qemu_iscntrl(c)		iscntrl((unsigned char)(c))
#define qemu_isdigit(c)		isdigit((unsigned char)(c))
#define qemu_isgraph(c)		isgraph((unsigned char)(c))
#define qemu_islower(c)		islower((unsigned char)(c))
#define qemu_isprint(c)		isprint((unsigned char)(c))
#define qemu_ispunct(c)		ispunct((unsigned char)(c))
#define qemu_isspace(c)		isspace((unsigned char)(c))
#define qemu_isupper(c)		isupper((unsigned char)(c))
#define qemu_isxdigit(c)	isxdigit((unsigned char)(c))
#define qemu_tolower(c)		tolower((unsigned char)(c))
#define qemu_toupper(c)		toupper((unsigned char)(c))
#define qemu_isascii(c)		isascii((unsigned char)(c))
#define qemu_toascii(c)		toascii((unsigned char)(c))

void *qemu_oom_check(void *ptr);

ssize_t qemu_write_full(int fd, const void *buf, size_t count)
    QEMU_WARN_UNUSED_RESULT;
ssize_t qemu_send_full(int fd, const void *buf, size_t count, int flags)
    QEMU_WARN_UNUSED_RESULT;
ssize_t qemu_recv_full(int fd, void *buf, size_t count, int flags)
    QEMU_WARN_UNUSED_RESULT;

#ifndef _WIN32
int qemu_pipe(int pipefd[2]);
/* like openpty() but also makes it raw; return master fd */
int qemu_openpty_raw(int *aslave, char *pty_name);
#endif

#ifdef _WIN32
/* MinGW needs type casts for the 'buf' and 'optval' arguments. */
#define qemu_getsockopt(sockfd, level, optname, optval, optlen) \
    getsockopt(sockfd, level, optname, (void *)optval, optlen)
#define qemu_setsockopt(sockfd, level, optname, optval, optlen) \
    setsockopt(sockfd, level, optname, (const void *)optval, optlen)
#define qemu_recv(sockfd, buf, len, flags) recv(sockfd, (void *)buf, len, flags)
#define qemu_sendto(sockfd, buf, len, flags, destaddr, addrlen) \
    sendto(sockfd, (const void *)buf, len, flags, destaddr, addrlen)
#else
#define qemu_getsockopt(sockfd, level, optname, optval, optlen) \
    getsockopt(sockfd, level, optname, optval, optlen)
#define qemu_setsockopt(sockfd, level, optname, optval, optlen) \
    setsockopt(sockfd, level, optname, optval, optlen)
#define qemu_recv(sockfd, buf, len, flags) recv(sockfd, buf, len, flags)
#define qemu_sendto(sockfd, buf, len, flags, destaddr, addrlen) \
    sendto(sockfd, buf, len, flags, destaddr, addrlen)
#endif

/* Error handling.  */

void QEMU_NORETURN hw_error(const char *fmt, ...) GCC_FMT_ATTR(1, 2);

struct ParallelIOArg {
    void *buffer;
    int count;
};

typedef int (*DMA_transfer_handler) (void *opaque, int nchan, int pos, int size);

typedef uint64_t pcibus_t;

typedef struct PCIHostDeviceAddress {
    unsigned int domain;
    unsigned int bus;
    unsigned int slot;
    unsigned int function;
} PCIHostDeviceAddress;

void tcg_exec_init(unsigned long tb_size);
bool tcg_enabled(void);

void cpu_exec_init_all(void);

/* CPU save/load.  */
#ifdef CPU_SAVE_VERSION
void cpu_save(QEMUFile *f, void *opaque);
int cpu_load(QEMUFile *f, void *opaque, int version_id);
#endif

/* Unblock cpu */
void qemu_cpu_kick_self(void);

/* work queue */
struct qemu_work_item {
    struct qemu_work_item *next;
    void (*func)(void *data);
    void *data;
    int done;
    bool free;
};


/**
 * Sends a (part of) iovec down a socket, yielding when the socket is full, or
 * Receives data into a (part of) iovec from a socket,
 * yielding when there is no data in the socket.
 * The same interface as qemu_sendv_recvv(), with added yielding.
 * XXX should mark these as coroutine_fn
 */
ssize_t qemu_co_sendv_recvv(int sockfd, struct iovec *iov, unsigned iov_cnt,
                            size_t offset, size_t bytes, bool do_send);
#define qemu_co_recvv(sockfd, iov, iov_cnt, offset, bytes) \
  qemu_co_sendv_recvv(sockfd, iov, iov_cnt, offset, bytes, false)
#define qemu_co_sendv(sockfd, iov, iov_cnt, offset, bytes) \
  qemu_co_sendv_recvv(sockfd, iov, iov_cnt, offset, bytes, true)

/**
 * The same as above, but with just a single buffer
 */
ssize_t qemu_co_send_recv(int sockfd, void *buf, size_t bytes, bool do_send);
#define qemu_co_recv(sockfd, buf, bytes) \
  qemu_co_send_recv(sockfd, buf, bytes, false)
#define qemu_co_send(sockfd, buf, bytes) \
  qemu_co_send_recv(sockfd, buf, bytes, true)

typedef struct QEMUIOVector {
    struct iovec *iov;
    int niov;
    int nalloc;
    size_t size;
} QEMUIOVector;

void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint);
void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov);
void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len);
void qemu_iovec_concat(QEMUIOVector *dst,
                       QEMUIOVector *src, size_t soffset, size_t sbytes);
size_t qemu_iovec_concat_iov(QEMUIOVector *dst,
                             struct iovec *src_iov, unsigned int src_cnt,
                             size_t soffset, size_t sbytes);
bool qemu_iovec_is_zero(QEMUIOVector *qiov);
void qemu_iovec_destroy(QEMUIOVector *qiov);
void qemu_iovec_reset(QEMUIOVector *qiov);
size_t qemu_iovec_to_buf(QEMUIOVector *qiov, size_t offset,
                         void *buf, size_t bytes);
size_t qemu_iovec_from_buf(QEMUIOVector *qiov, size_t offset,
                           const void *buf, size_t bytes);
size_t qemu_iovec_memset(QEMUIOVector *qiov, size_t offset,
                         int fillc, size_t bytes);
ssize_t qemu_iovec_compare(QEMUIOVector *a, QEMUIOVector *b);
void qemu_iovec_clone(QEMUIOVector *dest, const QEMUIOVector *src, void *buf);
void qemu_iovec_discard_back(QEMUIOVector *qiov, size_t bytes);

bool buffer_is_zero(const void *buf, size_t len);

void qemu_progress_init(int enabled, float min_skip);
void qemu_progress_end(void);
void qemu_progress_print(float delta, int max);
const char *qemu_get_vm_name(void);

#define QEMU_FILE_TYPE_BIOS   0
#define QEMU_FILE_TYPE_KEYMAP 1
char *qemu_find_file(int type, const char *name);

/* OS specific functions */
void os_setup_early_signal_handling(void);
char *os_find_datadir(void);
void os_parse_cmd_args(int index, const char *optarg);

/* Convert a byte between binary and BCD.  */
static inline uint8_t to_bcd(uint8_t val)
{
    return ((val / 10) << 4) | (val % 10);
}

static inline uint8_t from_bcd(uint8_t val)
{
    return ((val >> 4) * 10) + (val & 0x0f);
}

/* compute with 96 bit intermediate result: (a*b)/c */
static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
{
    union {
        uint64_t ll;
        struct {
#ifdef HOST_WORDS_BIGENDIAN
            uint32_t high, low;
#else
            uint32_t low, high;
#endif
        } l;
    } u, res;
    uint64_t rl, rh;

    u.ll = a;
    rl = (uint64_t)u.l.low * (uint64_t)b;
    rh = (uint64_t)u.l.high * (uint64_t)b;
    rh += (rl >> 32);
    res.l.high = rh / c;
    res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
    return res.ll;
}

/* Round number down to multiple */
#define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m))

/* Round number up to multiple */
#define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m))

static inline bool is_power_of_2(uint64_t value)
{
    if (!value) {
        return 0;
    }

    return !(value & (value - 1));
}

/* round down to the nearest power of 2*/
int64_t pow2floor(int64_t value);

#include "qemu/module.h"

/*
 * Implementation of ULEB128 (http://en.wikipedia.org/wiki/LEB128)
 * Input is limited to 14-bit numbers
 */

int uleb128_encode_small(uint8_t *out, uint32_t n);
int uleb128_decode_small(const uint8_t *in, uint32_t *n);

/* unicode.c */
int mod_utf8_codepoint(const char *s, size_t n, char **end);

/*
 * Hexdump a buffer to a file. An optional string prefix is added to every line
 */

void qemu_hexdump(const char *buf, FILE *fp, const char *prefix, size_t size);

/* vector definitions */
#ifdef __ALTIVEC__
#include <altivec.h>
/* The altivec.h header says we're allowed to undef these for
 * C++ compatibility.  Here we don't care about C++, but we
 * undef them anyway to avoid namespace pollution.
 */
#undef vector
#undef pixel
#undef bool
#define VECTYPE        __vector unsigned char
#define SPLAT(p)       vec_splat(vec_ld(0, p), 0)
#define ALL_EQ(v1, v2) vec_all_eq(v1, v2)
/* altivec.h may redefine the bool macro as vector type.
 * Reset it to POSIX semantics. */
#define bool _Bool
#elif defined __SSE2__
#include <emmintrin.h>
#define VECTYPE        __m128i
#define SPLAT(p)       _mm_set1_epi8(*(p))
#define ALL_EQ(v1, v2) (_mm_movemask_epi8(_mm_cmpeq_epi8(v1, v2)) == 0xFFFF)
#else
#define VECTYPE        unsigned long
#define SPLAT(p)       (*(p) * (~0UL / 255))
#define ALL_EQ(v1, v2) ((v1) == (v2))
#endif

#define BUFFER_FIND_NONZERO_OFFSET_UNROLL_FACTOR 8
static inline bool
can_use_buffer_find_nonzero_offset(const void *buf, size_t len)
{
    return (len % (BUFFER_FIND_NONZERO_OFFSET_UNROLL_FACTOR
                   * sizeof(VECTYPE)) == 0
            && ((uintptr_t) buf) % sizeof(VECTYPE) == 0);
}
size_t buffer_find_nonzero_offset(const void *buf, size_t len);

/*
 * helper to parse debug environment variables
 */
int parse_debug_env(const char *name, int max, int initial);

const char *qemu_ether_ntoa(const MACAddr *mac);

#endif
OpenPOWER on IntegriCloud