From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753996AbeBSTzp (ORCPT ); Mon, 19 Feb 2018 14:55:45 -0500 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:36190 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753727AbeBSTzm (ORCPT ); Mon, 19 Feb 2018 14:55:42 -0500 Subject: Re: [PATCH v3 3/3] s390/setup : enable display support for KVM guest To: Farhan Ali , linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, linux-fbdev@vger.kernel.org Cc: geert@linux-m68k.org, borntraeger@de.ibm.com, tomi.valkeinen@ti.com, b.zolnierkie@samsung.com References: <8a6103fcc2b05f4426dcf6573a2175ffe6211403.1519053920.git.alifm@linux.vnet.ibm.com> From: Thomas Huth Message-ID: Date: Mon, 19 Feb 2018 20:55:39 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: <8a6103fcc2b05f4426dcf6573a2175ffe6211403.1519053920.git.alifm@linux.vnet.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 19.02.2018 16:47, Farhan Ali wrote: > The S390 architecture does not support any graphics hardware, > but with the latest support for Virtio GPU in Linux and Virtio > GPU emulation in QEMU, it's possible to enable graphics for > S390 using the Virtio GPU device. > > To enable display we need to enable the Linux Virtual Terminal (VT) > layer for S390. But the VT subsystem initializes quite early > at boot so we need a dummy console driver till the Virtio GPU > driver is initialized and we can run the framebuffer console. > > The framebuffer console over a Virtio GPU device can be run > in combination with the serial SCLP console (default on S390). > The SCLP console can still be accessed by management applications > (eg: via Libvirt's virsh console). > > Signed-off-by: Farhan Ali > Acked-by: Christian Borntraeger > --- > arch/s390/kernel/setup.c | 2 ++ > drivers/tty/Kconfig | 2 +- > drivers/video/console/Kconfig | 2 +- > 3 files changed, 4 insertions(+), 2 deletions(-) Reviewed-by: Thomas Huth