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default devices: core code & serial lines.

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Qemu creates a default serial line for you in case you didn't specify
one on the command line.  Right now this is tied to the '-serial
<chardev>' command line switch, which in turn causes trouble if you are
creating your serial line via '-device isa-serial,<props>'.

This patch adds a variable default_serial which says whenever a default
serial line should be added.  It is enabled by default.  It is cleared
when qemu finds '-serial' or '-device isa-serial' on the command line.

Part of the patch is some infrastructure for the '-device $driver'
checking (default_driver_check function) which will also be used by the
other patches of this series.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2009-12-08 13:11:41 +01:00 committed by Anthony Liguori
parent 735ba58849
commit 998bbd74b9
1 changed files with 81 additions and 41 deletions
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122
vl.c
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@ -271,6 +271,30 @@ uint8_t qemu_uuid[16];
static QEMUBootSetHandler *boot_set_handler;
static void *boot_set_opaque;
static int default_serial = 1;
static struct {
const char *driver;
int *flag;
} default_list[] = {
{ .driver = "isa-serial", .flag = &default_serial },
};
static int default_driver_check(QemuOpts *opts, void *opaque)
{
const char *driver = qemu_opt_get(opts, "driver");
int i;
if (!driver)
return 0;
for (i = 0; i < ARRAY_SIZE(default_list); i++) {
if (strcmp(default_list[i].driver, driver) != 0)
continue;
*(default_list[i].flag) = 0;
}
return 0;
}
/***********************************************************/
/* x86 ISA bus support */
@ -4600,6 +4624,7 @@ struct device_config {
enum {
DEV_USB, /* -usbdevice */
DEV_BT, /* -bt */
DEV_SERIAL, /* -serial */
} type;
const char *cmdline;
QTAILQ_ENTRY(device_config) next;
@ -4631,6 +4656,50 @@ static int foreach_device_config(int type, int (*func)(const char *cmdline))
return 0;
}
static void serial_monitor_mux(const char *monitor_devices[])
{
struct device_config *serial;
const char *devname;
if (strcmp(monitor_devices[0],"stdio") != 0)
return;
QTAILQ_FOREACH(serial, &device_configs, next) {
if (serial->type != DEV_SERIAL)
continue;
devname = serial->cmdline;
if (devname && !strcmp(devname,"mon:stdio")) {
monitor_devices[0] = NULL;
break;
} else if (devname && !strcmp(devname,"stdio")) {
monitor_devices[0] = NULL;
serial->cmdline = "mon:stdio";
break;
}
}
}
static int serial_parse(const char *devname)
{
static int index = 0;
char label[32];
if (strcmp(devname, "none") == 0)
return 0;
if (index == MAX_SERIAL_PORTS) {
fprintf(stderr, "qemu: too many serial ports\n");
exit(1);
}
snprintf(label, sizeof(label), "serial%d", index);
serial_hds[index] = qemu_chr_open(label, devname, NULL);
if (!serial_hds[index]) {
fprintf(stderr, "qemu: could not open serial device '%s': %s\n",
devname, strerror(errno));
return -1;
}
index++;
return 0;
}
int main(int argc, char **argv, char **envp)
{
const char *gdbstub_dev = NULL;
@ -4649,8 +4718,6 @@ int main(int argc, char **argv, char **envp)
CharDriverState *monitor_hds[MAX_MONITOR_DEVICES];
const char *monitor_devices[MAX_MONITOR_DEVICES];
int monitor_device_index;
const char *serial_devices[MAX_SERIAL_PORTS];
int serial_device_index;
const char *parallel_devices[MAX_PARALLEL_PORTS];
int parallel_device_index;
const char *virtio_consoles[MAX_VIRTIO_CONSOLES];
@ -4720,11 +4787,6 @@ int main(int argc, char **argv, char **envp)
cyls = heads = secs = 0;
translation = BIOS_ATA_TRANSLATION_AUTO;
serial_devices[0] = "vc:80Cx24C";
for(i = 1; i < MAX_SERIAL_PORTS; i++)
serial_devices[i] = NULL;
serial_device_index = 0;
parallel_devices[0] = "vc:80Cx24C";
for(i = 1; i < MAX_PARALLEL_PORTS; i++)
parallel_devices[i] = NULL;
@ -5172,12 +5234,8 @@ int main(int argc, char **argv, char **envp)
}
break;
case QEMU_OPTION_serial:
if (serial_device_index >= MAX_SERIAL_PORTS) {
fprintf(stderr, "qemu: too many serial ports\n");
exit(1);
}
serial_devices[serial_device_index] = optarg;
serial_device_index++;
add_device_config(DEV_SERIAL, optarg);
default_serial = 0;
break;
case QEMU_OPTION_watchdog:
if (watchdog) {
@ -5478,14 +5536,19 @@ int main(int argc, char **argv, char **envp)
exit(1);
}
qemu_opts_foreach(&qemu_device_opts, default_driver_check, NULL, 0);
if (display_type == DT_NOGRAPHIC) {
if (serial_device_index == 0)
serial_devices[0] = "stdio";
if (default_serial)
add_device_config(DEV_SERIAL, "stdio");
if (parallel_device_index == 0)
parallel_devices[0] = "null";
if (strncmp(monitor_devices[0], "vc", 2) == 0) {
monitor_devices[0] = "stdio";
}
} else {
if (default_serial)
add_device_config(DEV_SERIAL, "vc:80Cx24C");
}
if (qemu_opts_foreach(&qemu_chardev_opts, chardev_init_func, NULL, 1) != 0)
@ -5637,19 +5700,7 @@ int main(int argc, char **argv, char **envp)
ram_load, NULL);
/* Maintain compatibility with multiple stdio monitors */
if (!strcmp(monitor_devices[0],"stdio")) {
for (i = 0; i < MAX_SERIAL_PORTS; i++) {
const char *devname = serial_devices[i];
if (devname && !strcmp(devname,"mon:stdio")) {
monitor_devices[0] = NULL;
break;
} else if (devname && !strcmp(devname,"stdio")) {
monitor_devices[0] = NULL;
serial_devices[i] = "mon:stdio";
break;
}
}
}
serial_monitor_mux(monitor_devices);
if (nb_numa_nodes > 0) {
int i;
@ -5711,19 +5762,8 @@ int main(int argc, char **argv, char **envp)
}
}
for(i = 0; i < MAX_SERIAL_PORTS; i++) {
const char *devname = serial_devices[i];
if (devname && strcmp(devname, "none")) {
char label[32];
snprintf(label, sizeof(label), "serial%d", i);
serial_hds[i] = qemu_chr_open(label, devname, NULL);
if (!serial_hds[i]) {
fprintf(stderr, "qemu: could not open serial device '%s': %s\n",
devname, strerror(errno));
exit(1);
}
}
}
if (foreach_device_config(DEV_SERIAL, serial_parse) < 0)
exit(1);
for(i = 0; i < MAX_PARALLEL_PORTS; i++) {
const char *devname = parallel_devices[i];