On Tue, Feb 27, 2018 at 10:23:34AM +0100, Christian Borntraeger wrote:

Greg FYI, I plan to carry this patch via the s390/kvm tree.
As it drivers/tty/Kconfig, can you give an ack for this part?


On 02/22/2018 05:22 PM, Farhan Ali wrote:

quoted

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 <redacted>
Acked-by: Christian Borntraeger <redacted>
Reviewed-by: Thomas Huth <redacted>
---
 arch/s390/kernel/setup.c      | 2 ++
 drivers/tty/Kconfig           | 2 +-
 drivers/video/console/Kconfig | 2 +-
 3 files changed, 4 insertions(+), 2 deletions(-)

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>