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Subject[PATCH 22/24] ARM: enable earlyprintk=xen
Date
From: Ian Campbell <ian.campbell@citrix.com>

Currently ARM setup_early_printk does not support alternative early
consoles and it always registers early_console only.

This patch adds support for xenboot_console.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
---
arch/arm/kernel/early_printk.c | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/arch/arm/kernel/early_printk.c b/arch/arm/kernel/early_printk.c
index 85aa2b2..eecfa21 100644
--- a/arch/arm/kernel/early_printk.c
+++ b/arch/arm/kernel/early_printk.c
@@ -11,6 +11,8 @@
#include <linux/kernel.h>
#include <linux/console.h>
#include <linux/init.h>
+#include <linux/string.h>
+#include <xen/hvc-console.h>

extern void printch(int);

@@ -50,7 +52,14 @@ asmlinkage void early_printk(const char *fmt, ...)

static int __init setup_early_printk(char *buf)
{
- register_console(&early_console);
+ if (!buf || !strncmp(buf, "serial", 6))
+ register_console(&early_console);
+
+#ifdef CONFIG_HVC_XEN
+ if (!strncmp(buf, "xen", 3))
+ register_console(&xenboot_console);
+#endif
+
return 0;
}

--
1.7.2.5


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