[Xen-devel] [PATCH] xen: allow 8bit input in Xen serial console

[Manfred Haertel <Manfred.Haertel@xxxxxxxxxxxx>]

The Xen serial console cuts off the most significant bit from input 
characters, so you can't use e.g. German umlauts when logging in to the 
DOM0 Linux system from the serial console.
The following patch fixes that problem.

--- xen/drivers/char/serial.c.orig      2015-07-28 18:44:49.443889719 +0200
+++ xen/drivers/char/serial.c   2015-07-28 18:47:10.593728590 +0200
@@ -66,7 +66,7 @@
     spin_unlock_irqrestore(&port->rx_lock, flags);

     if ( fn != NULL )
-        (*fn)(c & 0x7f, regs);
+        (*fn)(c, regs);
 }

 void serial_tx_interrupt(struct serial_port *port, struct 
cpu_user_regs *regs)
@@ -297,7 +297,11 @@
     } while ( ((handle & SERHND_LO) &&  (c & 0x80)) ||
               ((handle & SERHND_HI) && !(c & 0x80)) );

-    return c & 0x7f;
+    if (handle & SERHND_HI)
+    {
+        c &= 0x7f;
+    }
+    return c;
 }

 int __init serial_parse_handle(char *conf)

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