bb7443f6d6
We already have pow2floor, mirror it and use instead of a function with similar results (same in used domain), to clarify our intent. Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
488 lines
14 KiB
C
488 lines
14 KiB
C
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/* Common header file that is included by all of QEMU.
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*
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* This file is supposed to be included only by .c files. No header file should
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* depend on qemu-common.h, as this would easily lead to circular header
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* dependencies.
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*
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* If a header file uses a definition from qemu-common.h, that definition
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* must be moved to a separate header file, and the header that uses it
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* must include that header.
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*/
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#ifndef QEMU_COMMON_H
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#define QEMU_COMMON_H
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#include "qemu/compiler.h"
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#include "config-host.h"
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#include "qemu/typedefs.h"
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#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__) || defined(__ia64__)
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#define WORDS_ALIGNED
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#endif
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#define TFR(expr) do { if ((expr) != -1) break; } while (errno == EINTR)
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/* we put basic includes here to avoid repeating them in device drivers */
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <string.h>
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#include <strings.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <time.h>
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#include <ctype.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <assert.h>
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#include <signal.h>
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#include "glib-compat.h"
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#include "qemu/option.h"
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#ifdef _WIN32
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#include "sysemu/os-win32.h"
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#endif
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#ifdef CONFIG_POSIX
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#include "sysemu/os-posix.h"
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#endif
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#ifndef O_LARGEFILE
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#define O_LARGEFILE 0
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#endif
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#ifndef MAP_ANONYMOUS
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#define MAP_ANONYMOUS MAP_ANON
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#endif
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#ifndef ENOMEDIUM
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#define ENOMEDIUM ENODEV
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#endif
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#if !defined(ENOTSUP)
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#define ENOTSUP 4096
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#endif
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#if !defined(ECANCELED)
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#define ECANCELED 4097
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#endif
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#if !defined(EMEDIUMTYPE)
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#define EMEDIUMTYPE 4098
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#endif
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#ifndef TIME_MAX
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#define TIME_MAX LONG_MAX
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#endif
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/* HOST_LONG_BITS is the size of a native pointer in bits. */
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#if UINTPTR_MAX == UINT32_MAX
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# define HOST_LONG_BITS 32
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#elif UINTPTR_MAX == UINT64_MAX
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# define HOST_LONG_BITS 64
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#else
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# error Unknown pointer size
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#endif
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typedef int (*fprintf_function)(FILE *f, const char *fmt, ...)
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GCC_FMT_ATTR(2, 3);
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#ifdef _WIN32
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#define fsync _commit
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#if !defined(lseek)
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# define lseek _lseeki64
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#endif
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int qemu_ftruncate64(int, int64_t);
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#if !defined(ftruncate)
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# define ftruncate qemu_ftruncate64
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#endif
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static inline char *realpath(const char *path, char *resolved_path)
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{
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_fullpath(resolved_path, path, _MAX_PATH);
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return resolved_path;
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}
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#endif
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void cpu_ticks_init(void);
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/* icount */
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void configure_icount(QemuOpts *opts, Error **errp);
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extern int use_icount;
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extern int icount_align_option;
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/* drift information for info jit command */
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extern int64_t max_delay;
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extern int64_t max_advance;
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void dump_drift_info(FILE *f, fprintf_function cpu_fprintf);
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#include "qemu/osdep.h"
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#include "qemu/bswap.h"
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/* FIXME: Remove NEED_CPU_H. */
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#ifdef NEED_CPU_H
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#include "cpu.h"
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#endif /* !defined(NEED_CPU_H) */
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/* main function, renamed */
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#if defined(CONFIG_COCOA)
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int qemu_main(int argc, char **argv, char **envp);
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#endif
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void qemu_get_timedate(struct tm *tm, int offset);
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int qemu_timedate_diff(struct tm *tm);
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/**
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* is_help_option:
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* @s: string to test
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*
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* Check whether @s is one of the standard strings which indicate
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* that the user is asking for a list of the valid values for a
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* command option like -cpu or -M. The current accepted strings
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* are 'help' and '?'. '?' is deprecated (it is a shell wildcard
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* which makes it annoying to use in a reliable way) but provided
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* for backwards compatibility.
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*
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* Returns: true if @s is a request for a list.
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*/
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static inline bool is_help_option(const char *s)
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{
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return !strcmp(s, "?") || !strcmp(s, "help");
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}
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/* cutils.c */
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void pstrcpy(char *buf, int buf_size, const char *str);
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void strpadcpy(char *buf, int buf_size, const char *str, char pad);
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char *pstrcat(char *buf, int buf_size, const char *s);
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int strstart(const char *str, const char *val, const char **ptr);
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int stristart(const char *str, const char *val, const char **ptr);
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int qemu_strnlen(const char *s, int max_len);
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char *qemu_strsep(char **input, const char *delim);
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time_t mktimegm(struct tm *tm);
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int qemu_fls(int i);
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int qemu_fdatasync(int fd);
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int fcntl_setfl(int fd, int flag);
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int qemu_parse_fd(const char *param);
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int parse_uint(const char *s, unsigned long long *value, char **endptr,
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int base);
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int parse_uint_full(const char *s, unsigned long long *value, int base);
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/*
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* strtosz() suffixes used to specify the default treatment of an
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* argument passed to strtosz() without an explicit suffix.
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* These should be defined using upper case characters in the range
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* A-Z, as strtosz() will use qemu_toupper() on the given argument
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* prior to comparison.
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*/
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#define STRTOSZ_DEFSUFFIX_EB 'E'
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#define STRTOSZ_DEFSUFFIX_PB 'P'
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#define STRTOSZ_DEFSUFFIX_TB 'T'
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#define STRTOSZ_DEFSUFFIX_GB 'G'
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#define STRTOSZ_DEFSUFFIX_MB 'M'
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#define STRTOSZ_DEFSUFFIX_KB 'K'
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#define STRTOSZ_DEFSUFFIX_B 'B'
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int64_t strtosz(const char *nptr, char **end);
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int64_t strtosz_suffix(const char *nptr, char **end, const char default_suffix);
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int64_t strtosz_suffix_unit(const char *nptr, char **end,
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const char default_suffix, int64_t unit);
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/* used to print char* safely */
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#define STR_OR_NULL(str) ((str) ? (str) : "null")
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/* id.c */
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bool id_wellformed(const char *id);
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/* path.c */
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void init_paths(const char *prefix);
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const char *path(const char *pathname);
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#define qemu_isalnum(c) isalnum((unsigned char)(c))
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#define qemu_isalpha(c) isalpha((unsigned char)(c))
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#define qemu_iscntrl(c) iscntrl((unsigned char)(c))
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#define qemu_isdigit(c) isdigit((unsigned char)(c))
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#define qemu_isgraph(c) isgraph((unsigned char)(c))
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#define qemu_islower(c) islower((unsigned char)(c))
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#define qemu_isprint(c) isprint((unsigned char)(c))
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#define qemu_ispunct(c) ispunct((unsigned char)(c))
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#define qemu_isspace(c) isspace((unsigned char)(c))
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#define qemu_isupper(c) isupper((unsigned char)(c))
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#define qemu_isxdigit(c) isxdigit((unsigned char)(c))
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#define qemu_tolower(c) tolower((unsigned char)(c))
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#define qemu_toupper(c) toupper((unsigned char)(c))
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#define qemu_isascii(c) isascii((unsigned char)(c))
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#define qemu_toascii(c) toascii((unsigned char)(c))
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void *qemu_oom_check(void *ptr);
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ssize_t qemu_write_full(int fd, const void *buf, size_t count)
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QEMU_WARN_UNUSED_RESULT;
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ssize_t qemu_send_full(int fd, const void *buf, size_t count, int flags)
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QEMU_WARN_UNUSED_RESULT;
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ssize_t qemu_recv_full(int fd, void *buf, size_t count, int flags)
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QEMU_WARN_UNUSED_RESULT;
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#ifndef _WIN32
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int qemu_pipe(int pipefd[2]);
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/* like openpty() but also makes it raw; return master fd */
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int qemu_openpty_raw(int *aslave, char *pty_name);
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#endif
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#ifdef _WIN32
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/* MinGW needs type casts for the 'buf' and 'optval' arguments. */
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#define qemu_getsockopt(sockfd, level, optname, optval, optlen) \
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getsockopt(sockfd, level, optname, (void *)optval, optlen)
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#define qemu_setsockopt(sockfd, level, optname, optval, optlen) \
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setsockopt(sockfd, level, optname, (const void *)optval, optlen)
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#define qemu_recv(sockfd, buf, len, flags) recv(sockfd, (void *)buf, len, flags)
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#define qemu_sendto(sockfd, buf, len, flags, destaddr, addrlen) \
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sendto(sockfd, (const void *)buf, len, flags, destaddr, addrlen)
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#else
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#define qemu_getsockopt(sockfd, level, optname, optval, optlen) \
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getsockopt(sockfd, level, optname, optval, optlen)
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#define qemu_setsockopt(sockfd, level, optname, optval, optlen) \
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setsockopt(sockfd, level, optname, optval, optlen)
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#define qemu_recv(sockfd, buf, len, flags) recv(sockfd, buf, len, flags)
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#define qemu_sendto(sockfd, buf, len, flags, destaddr, addrlen) \
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sendto(sockfd, buf, len, flags, destaddr, addrlen)
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#endif
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/* Error handling. */
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void QEMU_NORETURN hw_error(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
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struct ParallelIOArg {
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void *buffer;
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int count;
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};
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typedef int (*DMA_transfer_handler) (void *opaque, int nchan, int pos, int size);
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typedef uint64_t pcibus_t;
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typedef struct PCIHostDeviceAddress {
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unsigned int domain;
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unsigned int bus;
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unsigned int slot;
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unsigned int function;
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} PCIHostDeviceAddress;
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void tcg_exec_init(unsigned long tb_size);
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bool tcg_enabled(void);
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void cpu_exec_init_all(void);
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/* CPU save/load. */
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#ifdef CPU_SAVE_VERSION
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void cpu_save(QEMUFile *f, void *opaque);
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int cpu_load(QEMUFile *f, void *opaque, int version_id);
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#endif
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/* Unblock cpu */
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void qemu_cpu_kick_self(void);
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/* work queue */
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struct qemu_work_item {
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struct qemu_work_item *next;
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void (*func)(void *data);
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void *data;
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int done;
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bool free;
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};
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/**
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* Sends a (part of) iovec down a socket, yielding when the socket is full, or
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* Receives data into a (part of) iovec from a socket,
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* yielding when there is no data in the socket.
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* The same interface as qemu_sendv_recvv(), with added yielding.
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* XXX should mark these as coroutine_fn
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*/
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ssize_t qemu_co_sendv_recvv(int sockfd, struct iovec *iov, unsigned iov_cnt,
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size_t offset, size_t bytes, bool do_send);
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#define qemu_co_recvv(sockfd, iov, iov_cnt, offset, bytes) \
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qemu_co_sendv_recvv(sockfd, iov, iov_cnt, offset, bytes, false)
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#define qemu_co_sendv(sockfd, iov, iov_cnt, offset, bytes) \
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qemu_co_sendv_recvv(sockfd, iov, iov_cnt, offset, bytes, true)
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/**
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* The same as above, but with just a single buffer
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*/
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ssize_t qemu_co_send_recv(int sockfd, void *buf, size_t bytes, bool do_send);
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#define qemu_co_recv(sockfd, buf, bytes) \
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qemu_co_send_recv(sockfd, buf, bytes, false)
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#define qemu_co_send(sockfd, buf, bytes) \
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qemu_co_send_recv(sockfd, buf, bytes, true)
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typedef struct QEMUIOVector {
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struct iovec *iov;
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int niov;
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int nalloc;
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size_t size;
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} QEMUIOVector;
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void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint);
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void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov);
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void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len);
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void qemu_iovec_concat(QEMUIOVector *dst,
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QEMUIOVector *src, size_t soffset, size_t sbytes);
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size_t qemu_iovec_concat_iov(QEMUIOVector *dst,
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struct iovec *src_iov, unsigned int src_cnt,
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size_t soffset, size_t sbytes);
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bool qemu_iovec_is_zero(QEMUIOVector *qiov);
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void qemu_iovec_destroy(QEMUIOVector *qiov);
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void qemu_iovec_reset(QEMUIOVector *qiov);
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size_t qemu_iovec_to_buf(QEMUIOVector *qiov, size_t offset,
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void *buf, size_t bytes);
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size_t qemu_iovec_from_buf(QEMUIOVector *qiov, size_t offset,
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const void *buf, size_t bytes);
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size_t qemu_iovec_memset(QEMUIOVector *qiov, size_t offset,
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int fillc, size_t bytes);
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ssize_t qemu_iovec_compare(QEMUIOVector *a, QEMUIOVector *b);
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void qemu_iovec_clone(QEMUIOVector *dest, const QEMUIOVector *src, void *buf);
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void qemu_iovec_discard_back(QEMUIOVector *qiov, size_t bytes);
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bool buffer_is_zero(const void *buf, size_t len);
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void qemu_progress_init(int enabled, float min_skip);
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void qemu_progress_end(void);
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void qemu_progress_print(float delta, int max);
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const char *qemu_get_vm_name(void);
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#define QEMU_FILE_TYPE_BIOS 0
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#define QEMU_FILE_TYPE_KEYMAP 1
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char *qemu_find_file(int type, const char *name);
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/* OS specific functions */
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void os_setup_early_signal_handling(void);
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char *os_find_datadir(void);
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void os_parse_cmd_args(int index, const char *optarg);
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/* Convert a byte between binary and BCD. */
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static inline uint8_t to_bcd(uint8_t val)
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{
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return ((val / 10) << 4) | (val % 10);
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}
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static inline uint8_t from_bcd(uint8_t val)
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{
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return ((val >> 4) * 10) + (val & 0x0f);
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}
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/* compute with 96 bit intermediate result: (a*b)/c */
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#ifdef CONFIG_INT128
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static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
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{
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return (__int128_t)a * b / c;
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}
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#else
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static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
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{
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union {
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uint64_t ll;
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struct {
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#ifdef HOST_WORDS_BIGENDIAN
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uint32_t high, low;
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#else
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uint32_t low, high;
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#endif
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} l;
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} u, res;
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uint64_t rl, rh;
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u.ll = a;
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rl = (uint64_t)u.l.low * (uint64_t)b;
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rh = (uint64_t)u.l.high * (uint64_t)b;
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rh += (rl >> 32);
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res.l.high = rh / c;
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res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
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return res.ll;
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}
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#endif
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/* Round number down to multiple */
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#define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m))
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/* Round number up to multiple */
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#define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m))
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static inline bool is_power_of_2(uint64_t value)
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{
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if (!value) {
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return 0;
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}
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return !(value & (value - 1));
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}
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/* round down to the nearest power of 2*/
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int64_t pow2floor(int64_t value);
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/* round up to the nearest power of 2 (0 if overflow) */
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uint64_t pow2ceil(uint64_t value);
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#include "qemu/module.h"
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/*
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* Implementation of ULEB128 (http://en.wikipedia.org/wiki/LEB128)
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* Input is limited to 14-bit numbers
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*/
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int uleb128_encode_small(uint8_t *out, uint32_t n);
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int uleb128_decode_small(const uint8_t *in, uint32_t *n);
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/* unicode.c */
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int mod_utf8_codepoint(const char *s, size_t n, char **end);
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/*
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* Hexdump a buffer to a file. An optional string prefix is added to every line
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*/
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void qemu_hexdump(const char *buf, FILE *fp, const char *prefix, size_t size);
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/* vector definitions */
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#ifdef __ALTIVEC__
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#include <altivec.h>
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/* The altivec.h header says we're allowed to undef these for
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* C++ compatibility. Here we don't care about C++, but we
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* undef them anyway to avoid namespace pollution.
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*/
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#undef vector
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#undef pixel
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#undef bool
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#define VECTYPE __vector unsigned char
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#define SPLAT(p) vec_splat(vec_ld(0, p), 0)
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#define ALL_EQ(v1, v2) vec_all_eq(v1, v2)
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|
/* altivec.h may redefine the bool macro as vector type.
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|
* Reset it to POSIX semantics. */
|
|
#define bool _Bool
|
|
#elif defined __SSE2__
|
|
#include <emmintrin.h>
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|
#define VECTYPE __m128i
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|
#define SPLAT(p) _mm_set1_epi8(*(p))
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|
#define ALL_EQ(v1, v2) (_mm_movemask_epi8(_mm_cmpeq_epi8(v1, v2)) == 0xFFFF)
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|
#else
|
|
#define VECTYPE unsigned long
|
|
#define SPLAT(p) (*(p) * (~0UL / 255))
|
|
#define ALL_EQ(v1, v2) ((v1) == (v2))
|
|
#endif
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|
|
|
#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);
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|
|
|
/*
|
|
* 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
|