s390/setup : enable display support for KVM guest

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 <[email protected]>
Acked-by: Christian Borntraeger <[email protected]>
Reviewed-by: Thomas Huth <[email protected]>
Message-Id: <e23b61f4f599ba23881727a1e8880e9d60cc6a48.1519315352.git.alifm@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
This commit is contained in:
Farhan Ali 2018-02-22 11:22:24 -05:00 • committed by Martin Schwidefsky
commit 579f1a2883
3 changed files with 4 additions and 2 deletions

View file

@ -11,7 +11,7 @@ if TTY
config VT
bool "Virtual terminal" if EXPERT
depends on !S390 && !UML
depends on !UML
select INPUT
default y
---help---