Am 04.03.2014 15:00, schrieb Paolo Bonzini:
From: Igor Mammedov <imamm...@redhat.com>
Adds option to -m
"mem" - startup memory amount
Sorry for jumping in late, but assuming that -m is for "memory" already,
wouldn't it make more sense to name it "size" instead of "mem"?
For compatibility with legacy CLI if suffix-less number is passed,
it assumes amount in Mb.
Otherwise user is free to use suffixed number using suffixes b,k/K,M,G
Signed-off-by: Igor Mammedov <imamm...@redhat.com>
Reviewed-by: Eric Blake <ebl...@redhat.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
qemu-options.hx | 9 +++++---
vl.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++-----------
2 files changed, 63 insertions(+), 16 deletions(-)
diff --git a/qemu-options.hx b/qemu-options.hx
index f948f28..98e78ca 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -214,10 +214,13 @@ use is discouraged as it may be removed from future
versions.
ETEXI
DEF("m", HAS_ARG, QEMU_OPTION_m,
- "-m megs set virtual RAM size to megs MB [default="
- stringify(DEFAULT_RAM_SIZE) "]\n", QEMU_ARCH_ALL)
+ "-m [mem=]megs\n"
+ " configure guest RAM\n"
+ " mem: initial amount of guest memory (default: "
+ stringify(DEFAULT_RAM_SIZE) "MiB)\n",
+ QEMU_ARCH_ALL)
STEXI
-@item -m @var{megs}
+@item -m [mem=]@var{megs}
@findex -m
Set virtual RAM size to @var{megs} megabytes. Default is 128 MiB. Optionally,
a suffix of ``M'' or ``G'' can be used to signify a value in megabytes or
diff --git a/vl.c b/vl.c
index dafe6f6..ac5f425 100644
--- a/vl.c
+++ b/vl.c
@@ -478,6 +478,20 @@ static QemuOptsList qemu_msg_opts = {
},
};
+static QemuOptsList qemu_mem_opts = {
+ .name = "memory",
+ .implied_opt_name = "mem",
+ .head = QTAILQ_HEAD_INITIALIZER(qemu_mem_opts.head),
+ .merge_lists = true,
+ .desc = {
+ {
+ .name = "mem",
+ .type = QEMU_OPT_SIZE,
+ },
+ { /* end of list */ }
+ },
+};
+
/**
* Get machine options
*
@@ -2718,6 +2732,7 @@ int main(int argc, char **argv, char **envp)
};
const char *trace_events = NULL;
const char *trace_file = NULL;
+ const ram_addr_t default_ram_size = (ram_addr_t)DEFAULT_RAM_SIZE * 1024 *
1024;
atexit(qemu_run_exit_notifiers);
error_set_progname(argv[0]);
@@ -2758,6 +2773,7 @@ int main(int argc, char **argv, char **envp)
qemu_add_opts(&qemu_realtime_opts);
qemu_add_opts(&qemu_msg_opts);
qemu_add_opts(&qemu_numa_opts);
+ qemu_add_opts(&qemu_mem_opts);
runstate_init();
@@ -2773,7 +2789,7 @@ int main(int argc, char **argv, char **envp)
module_call_init(MODULE_INIT_MACHINE);
machine = find_default_machine();
cpu_model = NULL;
- ram_size = 0;
+ ram_size = default_ram_size;
snapshot = 0;
cyls = heads = secs = 0;
translation = BIOS_ATA_TRANSLATION_AUTO;
@@ -3063,20 +3079,50 @@ int main(int argc, char **argv, char **envp)
exit(0);
break;
case QEMU_OPTION_m: {
- int64_t value;
uint64_t sz;
- char *end;
+ const char *mem_str;
- value = strtosz(optarg, &end);
- if (value < 0 || *end) {
- fprintf(stderr, "qemu: invalid ram size: %s\n", optarg);
- exit(1);
+ opts = qemu_opts_parse(qemu_find_opts("memory"),
+ optarg, 1);
+ if (!opts) {
+ exit(EXIT_FAILURE);
+ }
+
+ mem_str = qemu_opt_get(opts, "mem");
+ if (!mem_str) {
+ fprintf(stderr, "qemu: invalid -m option, missing "
+ "'mem' option\n");
error_report(), in particular to fix "qemu: "
+ exit(EXIT_FAILURE);
+ }
+ if (!*mem_str) {
+ fprintf(stderr, "qemu: missing 'mem' option value\n");
error_report()
+ exit(EXIT_FAILURE);
+ }
+
+ sz = qemu_opt_get_size(opts, "mem", ram_size);
+
+ /* Fix up legacy suffix-less format */
+ if (g_ascii_isdigit(mem_str[strlen(mem_str) - 1])) {
+ uint64_t overflow_check = sz;
+
+ sz <<= 20;
+ if ((sz >> 20) != overflow_check) {
+ fprintf(stderr, "qemu: too large 'mem' option "
+ "value\n");
error_report()
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ /* backward compatibility behaviour for case "-m 0" */
+ if (sz == 0) {
+ sz = default_ram_size;
}
- sz = QEMU_ALIGN_UP((uint64_t)value, 8192);
+
+ sz = QEMU_ALIGN_UP(sz, 8192);
ram_size = sz;
if (ram_size != sz) {
fprintf(stderr, "qemu: ram size too large\n");
error_report() while at it?
- exit(1);
+ exit(EXIT_FAILURE);
}
break;
}
@@ -3921,10 +3967,8 @@ int main(int argc, char **argv, char **envp)
exit(1);
}
- /* init the memory */
- if (ram_size == 0) {
- ram_size = DEFAULT_RAM_SIZE * 1024 * 1024;
- }
+ /* store value for the future use */
+ qemu_opt_set_number(qemu_find_opts_singleton("memory"), "mem", ram_size);
if (qemu_opts_foreach(qemu_find_opts("device"), device_help_func, NULL, 0)
!= 0) {
Here's a dependency on the preceding patch - other than that, these two
could be applied independently of the rest via qemu-trivial?
Regards,
Andreas