Commit 44a01d5b authored by Hendrik Brueckner's avatar Hendrik Brueckner Committed by Martin Schwidefsky
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[S390] s390/hvc_console: z/VM IUCV hypervisor console support

This patch introduces a new hypervisor console (HVC) back-end that provides
terminal access over the z/VM inter-user communication vehicle (IUCV).

The z/VM IUCV communication is independent of the regular tcp/ip network
and allows access even if there is no network connection between two
z/VM guest virtual machines.
The z/VM IUCV hypervisor console back-end helps the user to access a
z/VM guest virtual machine that lacks of network connectivity; and thus,
provides a "full-screen" terminal alternative to 3215/3270 terminal sessions.

Use the hvc_iucv=[0..8] kernel boot parameter to specify the number of
HVC terminals using a z/VM IUCV back-end.

A recent version of the s390-tools package is required to establish a
terminal connection to a z/VM IUCV hypervisor console back-end.

Signed-off-by: default avatarHendrik Brueckner <>
Signed-off-by: default avatarMartin Schwidefsky <>
parent 5d360a75
......@@ -622,6 +622,16 @@ config HVC_BEAT
Toshiba's Cell Reference Set Beat Console device driver
config HVC_IUCV
bool "z/VM IUCV Hypervisor console support (VM only)"
depends on S390
select IUCV
default y
This driver provides a Hypervisor console (HVC) back-end to access
a Linux (console) terminal via a z/VM IUCV communication path.
config HVC_XEN
bool "Xen Hypervisor Console support"
depends on XEN
......@@ -50,6 +50,7 @@ obj-$(CONFIG_HVC_BEAT) += hvc_beat.o
obj-$(CONFIG_HVC_DRIVER) += hvc_console.o
obj-$(CONFIG_HVC_IRQ) += hvc_irq.o
obj-$(CONFIG_HVC_XEN) += hvc_xen.o
obj-$(CONFIG_HVC_IUCV) += hvc_iucv.o
obj-$(CONFIG_VIRTIO_CONSOLE) += virtio_console.o
obj-$(CONFIG_RAW_DRIVER) += raw.o
obj-$(CONFIG_SGI_SNSC) += snsc.o snsc_event.o
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