linux-kernel - [PATCH] s390/console: enable dummy console for vt

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Date:   Thu, 15 Feb 2018 11:14:23 +0000
From:   Christian Borntraeger <borntraeger@...ibm.com>
To:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:     Farhan Ali <alifm@...ux.vnet.ibm.com>,
        linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org,
        linux-s390@...r.kernel.org, geert@...ux-m68k.org,
        stefan.kristiansson@...nalahti.fi, tomi.valkeinen@...com,
        schwidefsky@...ibm.com, dri-devel@...ts.freedesktop.org,
        Chen Liqin <liqin.linux@...il.com>,
        Lennox Wu <lennox.wu@...il.com>, Jeff Dike <jdike@...toit.com>,
        Richard Weinberger <richard@....at>,
        user-mode-linux-devel@...ts.sourceforge.net,
        Thomas Huth <thuth@...hat.com>,
        Christian Borntraeger <borntraeger@...ibm.com>
Subject: [PATCH] s390/console: enable dummy console for vt

To enable the virtual terminal layer with virtio-gpu, we need to
provide the dummy console. This console is hidden behind CONFIG_IOMEM
via the graphics support. Instead of fully enabling the graphic
drivers lets just provide a Kconfig option for the dummy console.

Signed-off-by: Christian Borntraeger <borntraeger@...ibm.com>
---
New version: instead of moving around the graphic and console stuff,
let's just keep an s390 specific variant of CONFIG_DUMMY_CONSOLE
 arch/s390/Kconfig | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index cbe1d978693a..a69690f616f3 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -952,6 +952,11 @@ config S390_HYPFS_FS
 
 source "arch/s390/kvm/Kconfig"
 
+config DUMMY_CONSOLE
+       bool
+       depends on VT
+       default y
+
 config S390_GUEST
 	def_bool y
 	prompt "s390 support for virtio devices"
-- 
2.14.3