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