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: > 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 <alifm@xxxxxxxxxxxxxxxxxx> > Acked-by: Christian Borntraeger <borntraeger@xxxxxxxxxx> > Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx> > --- > arch/s390/kernel/setup.c | 2 ++ > drivers/tty/Kconfig | 2 +- > drivers/video/console/Kconfig | 2 +- > 3 files changed, 4 insertions(+), 2 deletions(-) > > diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c > index a6a91f0..f98a0f3 100644 > --- a/arch/s390/kernel/setup.c > +++ b/arch/s390/kernel/setup.c > @@ -221,6 +221,8 @@ static void __init conmode_default(void) > SET_CONSOLE_SCLP; > #endif > } > + if (IS_ENABLED(CONFIG_VT) && IS_ENABLED(CONFIG_DUMMY_CONSOLE)) > + conswitchp = &dummy_con; > } > > #ifdef CONFIG_CRASH_DUMP > diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig > index b811442..5ca53fa 100644 > --- a/drivers/tty/Kconfig > +++ b/drivers/tty/Kconfig > @@ -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--- > diff --git a/drivers/video/console/Kconfig b/drivers/video/console/Kconfig > index 9485857..b9c2c91 100644 > --- a/drivers/video/console/Kconfig > +++ b/drivers/video/console/Kconfig > @@ -9,7 +9,7 @@ config VGA_CONSOLE > depends on !4xx && !PPC_8xx && !SPARC && !M68K && !PARISC && !FRV && \ > !SUPERH && !BLACKFIN && !AVR32 && !MN10300 && !CRIS && \ > (!ARM || ARCH_FOOTBRIDGE || ARCH_INTEGRATOR || ARCH_NETWINDER) && \ > - !ARM64 && !ARC && !MICROBLAZE && !OPENRISC && HAS_IOMEM > + !ARM64 && !ARC && !MICROBLAZE && !OPENRISC && HAS_IOMEM && !S390 > default y > help > Saying Y here will allow you to use Linux in text mode through a > -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
