[PATCH 10/11] s390: Add default support for SCLP console

Cornelia Huck
2013-01-24T12:28:10Z

From: Alexander Graf <agraf@suse.de>

The current s390 machine uses the virtio console as default console,
but this doesn't mean that we always want to keep it that way for new
machines.

This patch introduces a way for a machine type to specify that it wants
the default console to be an SCLP console, which is a lot closer to what
real hardware does.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---
hw/boards.h | 1 +
vl.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 49 insertions(+)

diff --git a/hw/boards.h b/hw/boards.h
index 3ff9665..3813d4e 100644
--- a/hw/boards.h
+++ b/hw/boards.h
@@ -33,6 +33,7 @@ typedef struct QEMUMachine {
unsigned int no_serial:1,
no_parallel:1,
use_virtcon:1,
+ use_sclp:1,
no_floppy:1,
no_cdrom:1,
no_sdcard:1;
diff --git a/vl.c b/vl.c
index 4ee1302..6a19a8f 100644
--- a/vl.c
+++ b/vl.c
@@ -176,6 +176,7 @@ int main(int argc, char **argv)
#define DEFAULT_RAM_SIZE 128

#define MAX_VIRTIO_CONSOLES 1
+#define MAX_SCLP_CONSOLES 1

static const char *data_dir;
const char *bios_name = NULL;
@@ -203,6 +204,7 @@ int no_quit = 0;
CharDriverState *serial_hds[MAX_SERIAL_PORTS];
CharDriverState *parallel_hds[MAX_PARALLEL_PORTS];
CharDriverState *virtcon_hds[MAX_VIRTIO_CONSOLES];
+CharDriverState *sclp_hds[MAX_SCLP_CONSOLES];
int win2k_install_hack = 0;
int singlestep = 0;
int smp_cpus = 1;
@@ -271,6 +273,7 @@ static int tcg_tb_size;
static int default_serial = 1;
static int default_parallel = 1;
static int default_virtcon = 1;
+static int default_sclp = 1;
static int default_monitor = 1;
static int default_floppy = 1;
static int default_cdrom = 1;
@@ -2340,6 +2343,7 @@ struct device_config {
DEV_VIRTCON, /* -virtioconsole */
DEV_DEBUGCON, /* -debugcon */
DEV_GDB, /* -gdb, -s */
+ DEV_SCLP, /* s390 sclp */
} type;
const char *cmdline;
Location loc;
@@ -2458,6 +2462,39 @@ static int virtcon_parse(const char *devname)
return 0;
}

+static int sclp_parse(const char *devname)
+{
+ QemuOptsList *device = qemu_find_opts("device");
+ static int index = 0;
+ char label[32];
+ QemuOpts *dev_opts;
+
+ if (strcmp(devname, "none") == 0) {
+ return 0;
+ }
+ if (index == MAX_SCLP_CONSOLES) {
+ fprintf(stderr, "qemu: too many sclp consoles\n");
+ exit(1);
+ }
+
+ assert(arch_type == QEMU_ARCH_S390X);
+
+ dev_opts = qemu_opts_create(device, NULL, 0, NULL);
+ qemu_opt_set(dev_opts, "driver", "sclpconsole");
+
+ snprintf(label, sizeof(label), "sclpcon%d", index);
+ sclp_hds[index] = qemu_chr_new(label, devname, NULL);
+ if (!sclp_hds[index]) {
+ fprintf(stderr, "qemu: could not connect sclp console"
+ " to character backend '%s'\n", devname);
+ return -1;
+ }
+ qemu_opt_set(dev_opts, "chardev", label);
+
+ index++;
+ return 0;
+}
+
static int debugcon_parse(const char *devname)
{
QemuOpts *opts;
@@ -3832,6 +3869,9 @@ int main(int argc, char **argv, char **envp)
if (!machine->use_virtcon) {
default_virtcon = 0;
}
+ if (!machine->use_sclp) {
+ default_sclp = 0;
+ }
if (machine->no_floppy) {
default_floppy = 0;
}
@@ -3873,11 +3913,15 @@ int main(int argc, char **argv, char **envp)
add_device_config(DEV_SERIAL, "mon:stdio");
} else if (default_virtcon && default_monitor) {
add_device_config(DEV_VIRTCON, "mon:stdio");
+ } else if (default_sclp && default_monitor) {
+ add_device_config(DEV_SCLP, "mon:stdio");
} else {
if (default_serial)
add_device_config(DEV_SERIAL, "stdio");
if (default_virtcon)
add_device_config(DEV_VIRTCON, "stdio");
+ if (default_sclp)
+ add_device_config(DEV_SCLP, "stdio");
if (default_monitor)
monitor_parse("stdio", "readline");
}
@@ -3890,6 +3934,8 @@ int main(int argc, char **argv, char **envp)
monitor_parse("vc:80Cx24C", "readline");
if (default_virtcon)
add_device_config(DEV_VIRTCON, "vc:80Cx24C");
+ if (default_sclp)
+ add_device_config(DEV_SCLP, "vc:80Cx24C");
}

socket_init();
@@ -4060,6 +4106,8 @@ int main(int argc, char **argv, char **envp)
exit(1);
if (foreach_device_config(DEV_VIRTCON, virtcon_parse) < 0)
exit(1);
+ if (foreach_device_config(DEV_SCLP, sclp_parse) < 0)
+ exit(1);
if (foreach_device_config(DEV_DEBUGCON, debugcon_parse) < 0)
exit(1);

--
1.7.12.4