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Re: [PATCH] hvc/xen: Check console connection flag


  • To: Jason Andryuk <jason.andryuk@xxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
  • From: Jiri Slaby <jirislaby@xxxxxxxxxx>
  • Date: Fri, 13 Mar 2026 09:33:07 +0100
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  • Cc: linuxppc-dev@xxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-serial@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx
  • Delivery-date: Fri, 13 Mar 2026 08:33:41 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 12. 03. 26, 18:38, Jason Andryuk wrote:
--- a/include/xen/interface/io/console.h
+++ b/include/xen/interface/io/console.h
@@ -19,6 +19,19 @@ struct xencons_interface {
      char out[2048];
      XENCONS_RING_IDX in_cons, in_prod;
      XENCONS_RING_IDX out_cons, out_prod;
+/*
+ * Flag values signaling from backend to frontend whether the console is
+ * connected.  i.e. Whether it will be serviced and emptied.
+ *
+ * The flag starts as disconnected.
+ */
+#define XENCONSOLE_DISCONNECTED 1
+/*
+ * The flag is set to connected when the backend connects and the console
+ * will be serviced.
+ */
+#define XENCONSOLE_CONNECTED    0

This all should be an enum. And you can document it using kernel-doc properly then.

+    uint8_t connection;

And type check as well.

thanks,
--
js
suse labs



 


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