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xen/arm: allow console=hvc0 to be omitted for guests

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From: Ard Biesheuvel <ard.biesheuvel@linaro.org>

This patch registers hvc0 as the preferred console if no console
has been specified explicitly on the kernel command line.

The purpose is to allow platform agnostic kernels and boot images
(such as distro installers) to boot in a Xen/ARM domU without the
need to modify the command line by hand.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Julien Grall <julien.grall@linaro.org>
This commit is contained in:
Ard Biesheuvel 2015-05-06 14:14:22 +00:00 committed by David Vrabel
parent 5882bfef63
commit f1dddd118c
1 changed files with 4 additions and 0 deletions
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4
arch/arm/xen/enlighten.c
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@ -24,6 +24,7 @@
#include <linux/cpuidle.h>
#include <linux/cpufreq.h>
#include <linux/cpu.h>
#include <linux/console.h>
#include <linux/mm.h>
@ -183,6 +184,9 @@ void __init xen_early_init(void)
xen_start_info->flags |= SIF_INITDOMAIN|SIF_PRIVILEGED;
else
xen_start_info->flags &= ~(SIF_INITDOMAIN|SIF_PRIVILEGED);
if (!console_set_on_cmdline && !xen_initial_domain())
add_preferred_console("hvc", 0, NULL);
}
static int __init xen_guest_init(void)