From 1c6264cc67ac8712d84392fbc9293289011407c0 Mon Sep 17 00:00:00 2001 From: Pranavkumar Sawargaonkar Date: Mon, 20 May 2013 10:25:38 +0930 Subject: virtio: console: Add emergency writeonly register to config space This patch adds an emerg_wr register (writeonly) in config space of virtio console device which can be used for debugging. Signed-off-by: Pranavkumar Sawargaonkar Signed-off-by: Anup Patel Acked-by: Amit Shah Signed-off-by: Rusty Russell --- include/uapi/linux/virtio_console.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/uapi/linux/virtio_console.h') diff --git a/include/uapi/linux/virtio_console.h b/include/uapi/linux/virtio_console.h index ee13ab6c3614..3fd0dce3cb25 100644 --- a/include/uapi/linux/virtio_console.h +++ b/include/uapi/linux/virtio_console.h @@ -38,6 +38,7 @@ /* Feature bits */ #define VIRTIO_CONSOLE_F_SIZE 0 /* Does host provide console size? */ #define VIRTIO_CONSOLE_F_MULTIPORT 1 /* Does host provide multiple ports? */ +#define VIRTIO_CONSOLE_F_EMERG_WRITE 2 /* Does host support emergency write? */ #define VIRTIO_CONSOLE_BAD_ID (~(u32)0) @@ -48,6 +49,8 @@ struct virtio_console_config { __u16 rows; /* max. number of ports this device can hold */ __u32 max_nr_ports; + /* emergency write register */ + __u32 emerg_wr; } __attribute__((packed)); /* -- cgit v1.2.3