[S390] s390/hvc_console: z/VM IUCV hypervisor console support
commit44a01d5ba8a4d543694461cd3e178cfa6b3f221b
authorHendrik Brueckner <brueckner@linux.vnet.ibm.com>
Thu, 25 Dec 2008 12:38:57 +0000 (25 13:38 +0100)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Thu, 25 Dec 2008 12:39:03 +0000 (25 13:39 +0100)
treee8f118a9eb4036784509af07ee14928ceb8a677f
parent5d360a75f87f288e9a25d56cca503a7c7939e490
[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: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
drivers/char/Kconfig
drivers/char/Makefile
drivers/char/hvc_iucv.c [new file with mode: 0644]