[v2] s390: Add default support for SCLP console

Submitted by Alexander Graf on Jan. 24, 2013, 4:09 p.m.

Details

Message ID 1359043774-28539-1-git-send-email-agraf@suse.de
State New
Headers show

Commit Message

Alexander Graf Jan. 24, 2013, 4:09 p.m.
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>

---

v1 -> v2:

  - braces
---
 hw/boards.h |    1 +
 vl.c        |   51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 0 deletions(-)

Comments

Andreas Färber Jan. 24, 2013, 4:11 p.m.
Am 24.01.2013 17:09, schrieb Alexander Graf:
> 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>

Reviewed-by: Andreas Färber <afaerber@suse.de>

Thanks,
Andreas
Anthony Liguori Jan. 25, 2013, 2:15 p.m.
Hi,

Thank you for submitting your patch series.  checkpatch.pl has
detected that one or more of the patches in this series violate
the QEMU coding style.

If you believe this message was sent in error, please ignore it
or respond here with an explanation.

Otherwise, please correct the coding style issues and resubmit a
new version of the patch.

For more information about QEMU coding style, see:

http://git.qemu.org/?p=qemu.git;a=blob_plain;f=CODING_STYLE;hb=HEAD

Here is the output from checkpatch.pl:

Subject: s390: Add default support for SCLP console
ERROR: do not initialise statics to 0 or NULL
#71: FILE: vl.c:2468:
+    static int index = 0;

total: 1 errors, 0 warnings, 117 lines checked

Your patch has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.



Regards,

Anthony Liguori

Patch hide | download patch | download mbox

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..71bde61 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 +3913,16 @@  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 +3935,9 @@  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 +4108,9 @@  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);