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 <pranavku...@linaro.org>
Signed-off-by: Anup Patel <anup.pa...@linaro.org>
Signed-off-by: Rusty Russell <ru...@rustcorp.com.au>
---
include/uapi/linux/virtio_console.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/uapi/linux/virtio_console.h
b/include/uapi/linux/virtio_console.h
index ee13ab6..3fd0dce 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));
/*
--
1.7.9.5
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