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authorJeremy Fitzhardinge <jeremy@xensource.com>2007-07-17 18:37:06 -0700
committerJeremy Fitzhardinge <jeremy@goop.org>2007-07-18 08:47:44 -0700
commitb536b4b9623084d86f2b1f19cb44a2d6d74f00bf (patch)
tree86c1981309dbd8b9bf120d4ddba50abd105af89a /arch/x86_64
parent8b84ad942b534f8faeb34b68f0f7277ea375fed0 (diff)
xen: use the hvc console infrastructure for Xen console
Implement a Xen back-end for hvc console. * * * Add early printk support via hvc console, enable using "earlyprintk=xen" on the kernel command line. From: Gerd Hoffmann <kraxel@suse.de> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/x86_64')
-rw-r--r--arch/x86_64/kernel/early_printk.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/early_printk.c b/arch/x86_64/kernel/early_printk.c
index 296d2b0c5d8..fd9aff3f389 100644
--- a/arch/x86_64/kernel/early_printk.c
+++ b/arch/x86_64/kernel/early_printk.c
@@ -6,6 +6,7 @@
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/fcntl.h>
+#include <xen/hvc-console.h>
/* Simple VGA output */
@@ -242,6 +243,10 @@ static int __init setup_early_printk(char *buf)
simnow_init(buf + 6);
early_console = &simnow_console;
keep_early = 1;
+#ifdef CONFIG_HVC_XEN
+ } else if (!strncmp(buf, "xen", 3)) {
+ early_console = &xenboot_console;
+#endif
}
if (keep_early)