diff options
| -rw-r--r-- | Makefile | 7 | ||||
| -rw-r--r-- | bsd-user/syscall.c | 9 | ||||
| -rw-r--r-- | linux-user/syscall.c | 2 | ||||
| -rw-r--r-- | qemu-img.c | 56 | ||||
| -rw-r--r-- | qemu-img.texi | 13 | ||||
| -rw-r--r-- | qemu-io.c | 18 | ||||
| -rw-r--r-- | qemu-nbd.c | 19 | ||||
| -rw-r--r-- | qemu-nbd.texi | 3 | ||||
| -rw-r--r-- | qemu-option-trace.texi | 25 | ||||
| -rw-r--r-- | qemu-options.hx | 29 | ||||
| -rw-r--r-- | trace-events | 16 | ||||
| -rw-r--r-- | trace/control.c | 42 | ||||
| -rw-r--r-- | trace/control.h | 25 | ||||
| -rw-r--r-- | vl.c | 38 |
14 files changed, 205 insertions, 97 deletions
@@ -564,8 +564,9 @@ qemu.1: qemu-doc.texi qemu-options.texi qemu-monitor.texi qemu-monitor-info.texi perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $< qemu.pod && \ $(POD2MAN) --section=1 --center=" " --release=" " qemu.pod > $@, \ " GEN $@") +qemu.1: qemu-option-trace.texi -qemu-img.1: qemu-img.texi qemu-img-cmds.texi +qemu-img.1: qemu-img.texi qemu-option-trace.texi qemu-img-cmds.texi $(call quiet-command, \ perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $< qemu-img.pod && \ $(POD2MAN) --section=1 --center=" " --release=" " qemu-img.pod > $@, \ @@ -577,7 +578,7 @@ fsdev/virtfs-proxy-helper.1: fsdev/virtfs-proxy-helper.texi $(POD2MAN) --section=1 --center=" " --release=" " fsdev/virtfs-proxy-helper.pod > $@, \ " GEN $@") -qemu-nbd.8: qemu-nbd.texi +qemu-nbd.8: qemu-nbd.texi qemu-option-trace.texi $(call quiet-command, \ perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $< qemu-nbd.pod && \ $(POD2MAN) --section=8 --center=" " --release=" " qemu-nbd.pod > $@, \ @@ -595,7 +596,7 @@ info: qemu-doc.info qemu-tech.info pdf: qemu-doc.pdf qemu-tech.pdf qemu-doc.dvi qemu-doc.html qemu-doc.info qemu-doc.pdf: \ - qemu-img.texi qemu-nbd.texi qemu-options.texi \ + qemu-img.texi qemu-nbd.texi qemu-options.texi qemu-option-trace.texi \ qemu-monitor.texi qemu-img-cmds.texi qemu-ga.texi \ qemu-monitor-info.texi diff --git a/bsd-user/syscall.c b/bsd-user/syscall.c index a9fe8693c1..66492aaf5d 100644 --- a/bsd-user/syscall.c +++ b/bsd-user/syscall.c @@ -315,12 +315,14 @@ abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, abi_long arg5, abi_long arg6, abi_long arg7, abi_long arg8) { + CPUState *cpu = ENV_GET_CPU(cpu_env); abi_long ret; void *p; #ifdef DEBUG gemu_log("freebsd syscall %d\n", num); #endif + trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8); if(do_strace) print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6); @@ -400,6 +402,7 @@ abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, #endif if (do_strace) print_freebsd_syscall_ret(num, ret); + trace_guest_user_syscall_ret(cpu, num, ret); return ret; efault: ret = -TARGET_EFAULT; @@ -410,12 +413,14 @@ abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) { + CPUState *cpu = ENV_GET_CPU(cpu_env); abi_long ret; void *p; #ifdef DEBUG gemu_log("netbsd syscall %d\n", num); #endif + trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, 0, 0); if(do_strace) print_netbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6); @@ -472,6 +477,7 @@ abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1, #endif if (do_strace) print_netbsd_syscall_ret(num, ret); + trace_guest_user_syscall_ret(cpu, num, ret); return ret; efault: ret = -TARGET_EFAULT; @@ -482,12 +488,14 @@ abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) { + CPUState *cpu = ENV_GET_CPU(cpu_env); abi_long ret; void *p; #ifdef DEBUG gemu_log("openbsd syscall %d\n", num); #endif + trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, 0, 0); if(do_strace) print_openbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6); @@ -544,6 +552,7 @@ abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1, #endif if (do_strace) print_openbsd_syscall_ret(num, ret); + trace_guest_user_syscall_ret(cpu, num, ret); return ret; efault: ret = -TARGET_EFAULT; diff --git a/linux-user/syscall.c b/linux-user/syscall.c index d3d7ee600a..28ee45a937 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -6802,6 +6802,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #ifdef DEBUG gemu_log("syscall %d", num); #endif + trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8); if(do_strace) print_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6); @@ -11245,6 +11246,7 @@ fail: #endif if(do_strace) print_syscall_ret(num, ret); + trace_guest_user_syscall_ret(cpu, num, ret); return ret; efault: ret = -TARGET_EFAULT; diff --git a/qemu-img.c b/qemu-img.c index 14e2661a5c..3322a1e5fc 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -32,6 +32,7 @@ #include "qemu/config-file.h" #include "qemu/option.h" #include "qemu/error-report.h" +#include "qemu/log.h" #include "qom/object_interfaces.h" #include "sysemu/sysemu.h" #include "sysemu/block-backend.h" @@ -39,6 +40,7 @@ #include "block/blockjob.h" #include "block/qapi.h" #include "crypto/init.h" +#include "trace/control.h" #include <getopt.h> #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \ @@ -91,9 +93,14 @@ static void QEMU_NORETURN help(void) { const char *help_msg = QEMU_IMG_VERSION - "usage: qemu-img command [command options]\n" + "usage: qemu-img [standard options] command [command options]\n" "QEMU disk image utility\n" "\n" + " '-h', '--help' display this help and exit\n" + " '-V', '--version' output version information and exit\n" + " '-T', '--trace' [[enable=]<pattern>][,events=<file>][,file=<file>]\n" + " specify tracing options\n" + "\n" "Command syntax:\n" #define DEF(option, callback, arg_string) \ " " arg_string "\n" @@ -3803,10 +3810,12 @@ int main(int argc, char **argv) const img_cmd_t *cmd; const char *cmdname; Error *local_error = NULL; + char *trace_file = NULL; int c; static const struct option long_options[] = { {"help", no_argument, 0, 'h'}, - {"version", no_argument, 0, 'v'}, + {"version", no_argument, 0, 'V'}, + {"trace", required_argument, NULL, 'T'}, {0, 0, 0, 0} }; @@ -3829,27 +3838,48 @@ int main(int argc, char **argv) if (argc < 2) { error_exit("Not enough arguments"); } - cmdname = argv[1]; qemu_add_opts(&qemu_object_opts); qemu_add_opts(&qemu_source_opts); + qemu_add_opts(&qemu_trace_opts); - /* find the command */ - for (cmd = img_cmds; cmd->name != NULL; cmd++) { - if (!strcmp(cmdname, cmd->name)) { - return cmd->handler(argc - 1, argv + 1); + while ((c = getopt_long(argc, argv, "+hVT:", long_options, NULL)) != -1) { + switch (c) { + case 'h': + help(); + return 0; + case 'V': + printf(QEMU_IMG_VERSION); + return 0; + case 'T': + g_free(trace_file); + trace_file = trace_opt_parse(optarg); + break; } } - c = getopt_long(argc, argv, "h", long_options, NULL); + cmdname = argv[optind]; - if (c == 'h') { - help(); - } - if (c == 'v') { - printf(QEMU_IMG_VERSION); + /* reset getopt_long scanning */ + argc -= optind; + if (argc < 1) { return 0; } + argv += optind; + optind = 1; + + if (!trace_init_backends()) { + exit(1); + } + trace_init_file(trace_file); + qemu_set_log(LOG_TRACE); + + /* find the command */ + for (cmd = img_cmds; cmd->name != NULL; cmd++) { + if (!strcmp(cmdname, cmd->name)) { + return cmd->handler(argc, argv); + } + } /* not found */ error_exit("Command not found: %s", cmdname); diff --git a/qemu-img.texi b/qemu-img.texi index cbe50e9b88..449a19c710 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -1,6 +1,6 @@ @example @c man begin SYNOPSIS -@command{qemu-img} @var{command} [@var{command} @var{options}] +@command{qemu-img} [@var{standard} @var{options}] @var{command} [@var{command} @var{options}] @c man end @end example @@ -16,6 +16,17 @@ inconsistent state. @c man begin OPTIONS +Standard options: +@table @option +@item -h, --help +Display this help and exit +@item -V, --version +Display version information and exit +@item -T, --trace [[enable=]@var{pattern}][,events=@var{file}][,file=@var{file}] +@findex --trace +@include qemu-option-trace.texi +@end table + The following commands are supported: @include qemu-img-cmds.texi @@ -18,6 +18,7 @@ #include "qemu/option.h" #include "qemu/config-file.h" #include "qemu/readline.h" +#include "qemu/log.h" #include "qapi/qmp/qstring.h" #include "qom/object_interfaces.h" #include "sysemu/block-backend.h" @@ -253,7 +254,9 @@ static void usage(const char *name) " -k, --native-aio use kernel AIO implementation (on Linux only)\n" " -t, --cache=MODE use the given cache mode for the image\n" " -d, --discard=MODE use the given discard mode for the image\n" -" -T, --trace FILE enable trace events listed in the given file\n" +" -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" +" specify tracing options\n" +" see qemu-img(1) man page for full description\n" " -h, --help display this help and exit\n" " -V, --version output version information and exit\n" "\n" @@ -458,6 +461,7 @@ int main(int argc, char **argv) Error *local_error = NULL; QDict *opts = NULL; const char *format = NULL; + char *trace_file = NULL; #ifdef CONFIG_POSIX signal(SIGPIPE, SIG_IGN); @@ -470,6 +474,7 @@ int main(int argc, char **argv) module_call_init(MODULE_INIT_QOM); qemu_add_opts(&qemu_object_opts); + qemu_add_opts(&qemu_trace_opts); bdrv_init(); while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) { @@ -509,9 +514,8 @@ int main(int argc, char **argv) } break; case 'T': - if (!trace_init_backends()) { - exit(1); /* error message will have been printed */ - } + g_free(trace_file); + trace_file = trace_opt_parse(optarg); break; case 'V': printf("%s version %s\n", progname, QEMU_VERSION); @@ -557,6 +561,12 @@ int main(int argc, char **argv) exit(1); } + if (!trace_init_backends()) { + exit(1); + } + trace_init_file(trace_file); + qemu_set_log(LOG_TRACE); + /* initialize commands */ qemuio_add_command(&quit_cmd); qemuio_add_command(&open_cmd); diff --git a/qemu-nbd.c b/qemu-nbd.c index 9519db324b..321f02bd15 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -27,12 +27,14 @@ #include "qemu/error-report.h" #include "qemu/config-file.h" #include "qemu/bswap.h" +#include "qemu/log.h" #include "block/snapshot.h" #include "qapi/util.h" #include "qapi/qmp/qstring.h" #include "qom/object_interfaces.h" #include "io/channel-socket.h" #include "crypto/init.h" +#include "trace/control.h" #include <getopt.h> #include <libgen.h> @@ -88,6 +90,8 @@ static void usage(const char *name) "General purpose options:\n" " --object type,id=ID,... define an object such as 'secret' for providing\n" " passwords and/or encryption keys\n" +" -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" +" specify tracing options\n" #ifdef __linux__ "Kernel NBD client support:\n" " -c, --connect=DEV connect FILE to the local NBD device DEV\n" @@ -470,7 +474,7 @@ int main(int argc, char **argv) off_t fd_size; QemuOpts *sn_opts = NULL; const char *sn_id_or_name = NULL; - const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:"; + const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:"; struct option lopt[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, 'V' }, @@ -498,6 +502,7 @@ int main(int argc, char **argv) { "export-name", required_argument, NULL, 'x' }, { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, + { "trace", required_argument, NULL, 'T' }, { NULL, 0, NULL, 0 } }; int ch; @@ -518,6 +523,7 @@ int main(int argc, char **argv) const char *tlscredsid = NULL; bool imageOpts = false; bool writethrough = true; + char *trace_file = NULL; /* The client thread uses SIGTERM to interrupt the server. A signal * handler ensures that "qemu-nbd -v -c" exits with a nice status code. @@ -531,6 +537,7 @@ int main(int argc, char **argv) module_call_init(MODULE_INIT_QOM); qemu_add_opts(&qemu_object_opts); + qemu_add_opts(&qemu_trace_opts); qemu_init_exec_dir(argv[0]); while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { @@ -703,6 +710,10 @@ int main(int argc, char **argv) case QEMU_NBD_OPT_IMAGE_OPTS: imageOpts = true; break; + case 'T': + g_free(trace_file); + trace_file = trace_opt_parse(optarg); + break; } } @@ -718,6 +729,12 @@ int main(int argc, char **argv) exit(EXIT_FAILURE); } + if (!trace_init_backends()) { + exit(1); + } + trace_init_file(trace_file); + qemu_set_log(LOG_TRACE); + if (tlscredsid) { if (sockpath) { error_report("TLS is only supported with IPv4/IPv6"); diff --git a/qemu-nbd.texi b/qemu-nbd.texi index 9f23343450..91ebf04b5b 100644 --- a/qemu-nbd.texi +++ b/qemu-nbd.texi @@ -92,6 +92,9 @@ Display extra debugging information Display this help and exit @item -V, --version Display version information and exit +@item -T, --trace [[enable=]@var{pattern}][,events=@var{file}][,file=@var{file}] +@findex --trace +@include qemu-option-trace.texi @end table @c man end diff --git a/qemu-option-trace.texi b/qemu-option-trace.texi new file mode 100644 index 0000000000..693ab5a3e1 --- /dev/null +++ b/qemu-option-trace.texi @@ -0,0 +1,25 @@ +Specify tracing options. + +@table @option +@item [enable=]@var{pattern} +Immediately enable events matching @var{pattern}. +The file must contain one event name (as listed in the @file{trace-events-all} +file) per line; globbing patterns are accepted too. This option is only +available if QEMU has been compiled with the @var{simple}, @var{stderr} +or @var{ftrace} tracing backend. To specify multiple events or patterns, +specify the @option{-trace} option multiple times. + +Use @code{-trace help} to print a list of names of trace points. + +@item events=@var{file} +Immediately enable events listed in @var{file}. +The file must contain one event name (as listed in the @file{trace-events-all} +file) per line; globbing patterns are accepted too. This option is only +available if QEMU has been compiled with the @var{simple}, @var{stderr} or +@var{ftrace} tracing backend. + +@item file=@var{file} +Log output traces to @var{file}. +This option is only available if QEMU has been compiled with +the @var{simple} tracing backend. +@end table diff --git a/qemu-options.hx b/qemu-options.hx index 44c658fd4e..a95a936e55 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -3669,34 +3669,9 @@ DEF("trace", HAS_ARG, QEMU_OPTION_trace, STEXI HXCOMM This line is not accurate, as some sub-options are backend-specific but HXCOMM HX does not support conditional compilation of text. -@item -trace [events=@var{file}][,file=@var{file}] +@item -trace [[enable=]@var{pattern}][,events=@var{file}][,file=@var{file}] @findex -trace - -Specify tracing options. - -@table @option -@item [enable=]@var{pattern} -Immediately enable events matching @var{pattern}. -The file must contain one event name (as listed in the @file{trace-events-all} -file) per line; globbing patterns are accepted too. This option is only -available if QEMU has been compiled with the @var{simple}, @var{stderr} -or @var{ftrace} tracing backend. To specify multiple events or patterns, -specify the @option{-trace} option multiple times. - -Use @code{-trace help} to print a list of names of trace points. - -@item events=@var{file} -Immediately enable events listed in @var{file}. -The file must contain one event name (as listed in the @file{trace-events-all} -file) per line; globbing patterns are accepted too. This option is only -available if QEMU has been compiled with the @var{simple}, @var{stderr} or -@var{ftrace} tracing backend. - -@item file=@var{file} -Log output traces to @var{file}. -This option is only available if QEMU has been compiled with -the @var{simple} tracing backend. -@end table +@include qemu-option-trace.texi ETEXI HXCOMM Internal use diff --git a/trace-events b/trace-events index 9d76de8574..476705996b 100644 --- a/trace-events +++ b/trace-events @@ -156,3 +156,19 @@ memory_region_tb_write(int cpu_index, uint64_t addr, uint64_t value, unsigned si # # Targets: TCG(all) disable vcpu tcg guest_mem_before(TCGv vaddr, uint8_t info) "info=%d", "vaddr=0x%016"PRIx64" info=%d" + +# @num: System call number. +# @arg*: System call argument value. +# +# Start executing a guest system call in syscall emulation mode. +# +# Targets: TCG(all) +disable vcpu guest_user_syscall(uint64_t num, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5, uint64_t arg6, uint64_t arg7, uint64_t arg8) "num=0x%016"PRIx64" arg1=0x%016"PRIx64" arg2=0x%016"PRIx64" arg3=0x%016"PRIx64" arg4=0x%016"PRIx64" arg5=0x%016"PRIx64" arg6=0x%016"PRIx64" arg7=0x%016"PRIx64" arg8=0x%016"PRIx64 + +# @num: System call number. +# @ret: System call result value. +# +# Finish executing a guest system call in syscall emulation mode. +# +# Targets: TCG(all) +disable vcpu guest_user_syscall_ret(uint64_t num, uint64_t ret) "num=0x%016"PRIx64" ret=0x%016"PRIx64 diff --git a/trace/control.c b/trace/control.c index e1556a3570..86de8b9983 100644 --- a/trace/control.c +++ b/trace/control.c @@ -21,11 +21,33 @@ #endif #include "qapi/error.h" #include "qemu/error-report.h" +#include "qemu/config-file.h" #include "monitor/monitor.h" int trace_events_enabled_count; bool trace_events_dstate[TRACE_EVENT_COUNT]; +QemuOptsList qemu_trace_opts = { + .name = "trace", + .implied_opt_name = "enable", + .head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head), + .desc = { + { + .name = "enable", + .type = QEMU_OPT_STRING, + }, + { + .name = "events", + .type = QEMU_OPT_STRING, + },{ + .name = "file", + .type = QEMU_OPT_STRING, + }, + { /* end of list */ } + }, +}; + + TraceEvent *trace_event_name(const char *name) { assert(name != NULL); @@ -142,7 +164,7 @@ void trace_enable_events(const char *line_buf) } } -void trace_init_events(const char *fname) +static void trace_init_events(const char *fname) { Location loc; FILE *fp; @@ -217,3 +239,21 @@ bool trace_init_backends(void) return true; } + +char *trace_opt_parse(const char *optarg) +{ + char *trace_file; + QemuOpts *opts = qemu_opts_parse_noisily(qemu_find_opts("trace"), + optarg, true); + if (!opts) { + exit(1); + } + if (qemu_opt_get(opts, "enable")) { + trace_enable_events(qemu_opt_get(opts, "enable")); + } + trace_init_events(qemu_opt_get(opts, "events")); + trace_file = g_strdup(qemu_opt_get(opts, "file")); + qemu_opts_del(opts); + + return trace_file; +} diff --git a/trace/control.h b/trace/control.h index e2ba6d4de1..a2dd3eaedf 100644 --- a/trace/control.h +++ b/trace/control.h @@ -160,17 +160,6 @@ static void trace_event_set_state_dynamic(TraceEvent *ev, bool state); bool trace_init_backends(void); /** - * trace_init_events: - * @events: Name of file with events to be enabled at startup; may be NULL. - * Corresponds to commandline option "-trace events=...". - * - * Read the list of enabled tracing events. - * - * Returns: Whether the backends could be successfully initialized. - */ -void trace_init_events(const char *file); - -/** * trace_init_file: * @file: Name of trace output file; may be NULL. * Corresponds to commandline option "-trace file=...". @@ -197,6 +186,20 @@ void trace_list_events(void); */ void trace_enable_events(const char *line_buf); +/** + * Definition of QEMU options describing trace subsystem configuration + */ +extern QemuOptsList qemu_trace_opts; + +/** + * trace_opt_parse: + * @optarg: A string argument of --trace command line argument + * + * Initialize tracing subsystem. + * + * Returns the filename to save trace to. It must be freed with g_free(). + */ +char *trace_opt_parse(const char *optarg); #include "trace/control-internal.h" @@ -262,26 +262,6 @@ static QemuOptsList qemu_sandbox_opts = { }, }; -static QemuOptsList qemu_trace_opts = { - .name = "trace", - .implied_opt_name = "enable", - .head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head), - .desc = { - { - .name = "enable", - .type = QEMU_OPT_STRING, - }, - { - .name = "events", - .type = QEMU_OPT_STRING, - },{ - .name = "file", - .type = QEMU_OPT_STRING, - }, - { /* end of list */ } - }, -}; - static QemuOptsList qemu_option_rom_opts = { .name = "option-rom", .implied_opt_name = "romfile", @@ -3864,23 +3844,9 @@ int main(int argc, char **argv, char **envp) xen_mode = XEN_ATTACH; break; case QEMU_OPTION_trace: - { - opts = qemu_opts_parse_noisily(qemu_find_opts("trace"), - optarg, true); - if (!opts) { - exit(1); - } - if (qemu_opt_get(opts, "enable")) { - trace_enable_events(qemu_opt_get(opts, "enable")); - } - trace_init_events(qemu_opt_get(opts, "events")); - if (trace_file) { - g_free(trace_file); - } - trace_file = g_strdup(qemu_opt_get(opts, "file")); - qemu_opts_del(opts); + g_free(trace_file); + trace_file = trace_opt_parse(optarg); break; - } case QEMU_OPTION_readconfig: { int ret = qemu_read_config_file(optarg); |