add CONFIG_VT_UNICODE

As of now, the kernel defaults to non-unicode and XLATE for the keyboard.
We've been changing this in Fedora, but that requires patching the defaults
in the kernel.

The attached introduces CONFIG_VT_UNICODE, which sets the console in
unicode mode by default on boot, including both the virtual terminal and
the keyboard driver.

Signed-off-by: Bill Nottingham <notting@redhat.com>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

6 files changed, 27 insertions, 5 deletions

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index f6f8c03047fa..1232ace097e1 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -36,6 +36,23 @@ config VT
           If unsure, say Y, or else you won't be able to do much with your new
           shiny Linux system :-)
 
+config VT_UNICODE
+        bool "Virtual console is Unicode by default"
+        depends on VT
+        default n
+        ---help---
+          If you say Y here, the virtual terminal will be in UTF-8 by default,
+          and the keyboard will run in unicode mode.
+
+          If you say N here, the virtual terminal will not be in UTF-8 by
+          default, and the keyboard will run in XLATE mode.
+
+          This can also be changed by passing 'default_utf8=<0|1>' on the
+          kernel command line.
+
+          Historically, the kernel has defaulted to non-UTF8 and XLATE mode.
+          If unsure, say N here.
+
 config VT_CONSOLE
         bool "Support for console on virtual terminal" if EMBEDDED
         depends on VT
diff --git a/drivers/char/keyboard.c b/drivers/char/keyboard.c
index 5ae2a3250c50..212276affa1f 100644
--- a/drivers/char/keyboard.c
+++ b/drivers/char/keyboard.c
@@ -1381,7 +1381,7 @@ int __init kbd_init(void)
                 kbd_table[i].lockstate = KBD_DEFLOCK;
                 kbd_table[i].slockstate = 0;
                 kbd_table[i].modeflags = KBD_DEFMODE;
-                kbd_table[i].kbdmode = VC_XLATE;
+                kbd_table[i].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
         }
 
         error = input_register_handler(&kbd_handler);
diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index 179fa36ce485..78d14935f2b8 100644
--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@@ -108,12 +108,12 @@ static void sysrq_handle_unraw(int key, struct tty_struct *tty)
         struct kbd_struct *kbd = &kbd_table[fg_console];
 
         if (kbd)
-                kbd->kbdmode = VC_XLATE;
+                kbd->kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
 }
 static struct sysrq_key_op sysrq_unraw_op = {
         .handler        = sysrq_handle_unraw,
         .help_msg       = "unRaw",
-        .action_msg     = "Keyboard mode set to XLATE",
+        .action_msg     = "Keyboard mode set to system default",
         .enable_mask    = SYSRQ_ENABLE_KEYBOARD,
 };
 #else
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 0d56f8fc105c..645ad9808982 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -158,7 +158,11 @@ static void blank_screen_t(unsigned long dummy);
 static void set_palette(struct vc_data *vc);
 
 static int printable;           /* Is console ready for printing? */
-static int default_utf8;
+#ifdef CONFIG_VT_UNICODE
+int default_utf8 = 1;
+#else
+int default_utf8;
+#endif
 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
 
 /*
diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c
index 6c7384afff13..e6f89e8b9258 100644
--- a/drivers/char/vt_ioctl.c
+++ b/drivers/char/vt_ioctl.c
@@ -1125,7 +1125,7 @@ int vt_waitactive(int vt)
 void reset_vc(struct vc_data *vc)
 {
         vc->vc_mode = KD_TEXT;
-        kbd_table[vc->vc_num].kbdmode = VC_XLATE;
+        kbd_table[vc->vc_num].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
         vc->vt_mode.mode = VT_AUTO;
         vc->vt_mode.waitv = 0;
         vc->vt_mode.relsig = 0;
diff --git a/include/linux/vt_kern.h b/include/linux/vt_kern.h
index 699b7e9864fa..feb5e99a1079 100644
--- a/include/linux/vt_kern.h
+++ b/include/linux/vt_kern.h
@@ -87,6 +87,7 @@ extern int unbind_con_driver(const struct consw *csw, int first, int last,
 extern char con_buf[CON_BUF_SIZE];
 extern struct mutex con_buf_mtx;
 extern char vt_dont_switch;
+extern int default_utf8;
 
 struct vt_spawn_console {
         spinlock_t lock;