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vl: fix [memory] section with -readconfig

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The -M memory.* options do not have magic applied to them like the -m
option, namely no "M" (for mebibytes) is tacked at the end of a suffixless
value for "-M memory.size".

This magic is performed by parse_memory_options, and we have to do it for
both "-m" and the [memory] section of a config file.  Storing [memory]
sections directly to machine_opts_dict changed the meaning of

    [memory]
      size = "1024"

in a -readconfig file from 1024MiB to 8KiB (1024 Bytes rounded up to
8KiB silently).  To avoid this, the [memory] section has to be changed
back to QemuOpts (combining [memory] and "-m" will work fine thanks to
.merge_lists being true).

Change parse_memory_options() so that, similar to the older function
set_memory_options(), it operates after command line parsing is done;
and also call it where set_memory_options() used to be.

Note, the parsing code uses exit(1) instead of exit(EXIT_FAILURE) to
match neighboring code.

Reported-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Fixes: ce9d03fb3f ("machine: add mem compound property", 2022-05-12)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2022-08-05 12:01:51 +02:00
parent 55794c904d
commit e12f0685e8
1 changed files with 14 additions and 11 deletions
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25
softmmu/vl.c
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@ -1947,16 +1947,15 @@ static void qemu_resolve_machine_memdev(void)
}
}
static void parse_memory_options(const char *arg)
static void parse_memory_options(void)
{
QemuOpts *opts;
QemuOpts *opts = qemu_find_opts_singleton("memory");
QDict *dict, *prop;
const char *mem_str;
Location loc;
opts = qemu_opts_parse_noisily(qemu_find_opts("memory"), arg, true);
if (!opts) {
exit(EXIT_FAILURE);
}
loc_push_none(&loc);
qemu_opts_loc_restore(opts);
prop = qdict_new();
@ -1987,6 +1986,7 @@ static void parse_memory_options(const char *arg)
qdict_put(dict, "memory", prop);
keyval_merge(machine_opts_dict, dict, &error_fatal);
qobject_unref(dict);
loc_pop(&loc);
}
static void qemu_create_machine(QDict *qdict)
@ -2053,8 +2053,7 @@ static bool is_qemuopts_group(const char *group)
if (g_str_equal(group, "object") ||
g_str_equal(group, "machine") ||
g_str_equal(group, "smp-opts") ||
g_str_equal(group, "boot-opts") ||
g_str_equal(group, "memory")) {
g_str_equal(group, "boot-opts")) {
return false;
}
return true;
@ -2078,8 +2077,6 @@ static void qemu_record_config_group(const char *group, QDict *dict,
machine_merge_property("smp", dict, &error_fatal);
} else if (g_str_equal(group, "boot-opts")) {
machine_merge_property("boot", dict, &error_fatal);
} else if (g_str_equal(group, "memory")) {
machine_merge_property("memory", dict, &error_fatal);
} else {
abort();
}
@ -2882,7 +2879,10 @@ void qemu_init(int argc, char **argv, char **envp)
exit(0);
break;
case QEMU_OPTION_m:
parse_memory_options(optarg);
opts = qemu_opts_parse_noisily(qemu_find_opts("memory"), optarg, true);
if (opts == NULL) {
exit(1);
}
break;
#ifdef CONFIG_TPM
case QEMU_OPTION_tpmdev:
@ -3515,6 +3515,9 @@ void qemu_init(int argc, char **argv, char **envp)
configure_rtc(qemu_find_opts_singleton("rtc"));
/* Transfer QemuOpts options into machine options */
parse_memory_options();
qemu_create_machine(machine_opts_dict);
suspend_mux_open();