linux/drivers/tty/hvc/Kconfig
Linus Torvalds d4c6fa73fe Features:
- PV multiconsole support, so that there can be hvc1, hvc2, etc;
  - P-state and C-state power management driver that uploads said
    power management data to the hypervisor. It also inhibits cpufreq
    scaling drivers to load so that only the hypervisor can make power
    management decisions - fixing a weird perf bug.
  - Function Level Reset (FLR) support in the Xen PCI backend.
 Fixes:
  - Kconfig dependencies for Xen PV keyboard and video
  - Compile warnings and constify fixes
  - Change over to use percpu_xxx instead of this_cpu_xxx
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Merge tag 'stable/for-linus-3.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

Pull xen updates from Konrad Rzeszutek Wilk:
 "which has three neat features:

   - PV multiconsole support, so that there can be hvc1, hvc2, etc; This
     can be used in HVM and in PV mode.

   - P-state and C-state power management driver that uploads said power
     management data to the hypervisor.  It also inhibits cpufreq
     scaling drivers to load so that only the hypervisor can make power
     management decisions - fixing a weird perf bug.

     There is one thing in the Kconfig that you won't like: "default y
     if (X86_ACPI_CPUFREQ = y || X86_POWERNOW_K8 = y)" (note, that it
     all depends on CONFIG_XEN which depends on CONFIG_PARAVIRT which by
     default is off).  I've a fix to convert that boolean expression
     into "default m" which I am going to post after the cpufreq git
     pull - as the two patches to make this work depend on a fix in Dave
     Jones's tree.

   - Function Level Reset (FLR) support in the Xen PCI backend.

  Fixes:

   - Kconfig dependencies for Xen PV keyboard and video
   - Compile warnings and constify fixes
   - Change over to use percpu_xxx instead of this_cpu_xxx"

Fix up trivial conflicts in drivers/tty/hvc/hvc_xen.c due to changes to
a removed commit.

* tag 'stable/for-linus-3.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen kconfig: relax INPUT_XEN_KBDDEV_FRONTEND deps
  xen/acpi-processor: C and P-state driver that uploads said data to hypervisor.
  xen: constify all instances of "struct attribute_group"
  xen/xenbus: ignore console/0
  hvc_xen: introduce HVC_XEN_FRONTEND
  hvc_xen: implement multiconsole support
  hvc_xen: support PV on HVM consoles
  xenbus: don't free other end details too early
  xen/enlighten: Expose MWAIT and MWAIT_LEAF if hypervisor OKs it.
  xen/setup/pm/acpi: Remove the call to boot_option_idle_override.
  xenbus: address compiler warnings
  xen: use this_cpu_xxx replace percpu_xxx funcs
  xen/pciback: Support pci_reset_function, aka FLR or D3 support.
  pci: Introduce __pci_reset_function_locked to be used when holding device_lock.
  xen: Utilize the restore_msi_irqs hook.
2012-03-22 20:16:14 -07:00

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config HVC_DRIVER
bool
help
Generic "hypervisor virtual console" infrastructure for various
hypervisors (pSeries, iSeries, Xen, lguest).
It will automatically be selected if one of the back-end console drivers
is selected.
config HVC_IRQ
bool
config HVC_CONSOLE
bool "pSeries Hypervisor Virtual Console support"
depends on PPC_PSERIES
select HVC_DRIVER
select HVC_IRQ
help
pSeries machines when partitioned support a hypervisor virtual
console. This driver allows each pSeries partition to have a console
which is accessed via the HMC.
config HVC_OLD_HVSI
bool "Old driver for pSeries serial port (/dev/hvsi*)"
depends on HVC_CONSOLE
default n
config HVC_OPAL
bool "OPAL Console support"
depends on PPC_POWERNV
select HVC_DRIVER
select HVC_IRQ
default y
help
PowerNV machines running under OPAL need that driver to get a console
config HVC_RTAS
bool "IBM RTAS Console support"
depends on PPC_RTAS
select HVC_DRIVER
help
IBM Console device driver which makes use of RTAS
config HVC_BEAT
bool "Toshiba's Beat Hypervisor Console support"
depends on PPC_CELLEB
select HVC_DRIVER
help
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 HVC_DRIVER
select IUCV
default y
help
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
select HVC_DRIVER
select HVC_IRQ
default y
help
Xen virtual console device driver
config HVC_XEN_FRONTEND
bool "Xen Hypervisor Multiple Consoles support"
depends on HVC_XEN
select XEN_XENBUS_FRONTEND
default y
help
Xen driver for secondary virtual consoles
config HVC_UDBG
bool "udbg based fake hypervisor console"
depends on PPC && EXPERIMENTAL
select HVC_DRIVER
default n
help
This is meant to be used during HW bring up or debugging when
no other console mechanism exist but udbg, to get you a quick
console for userspace. Do NOT enable in production kernels.
config HVC_DCC
bool "ARM JTAG DCC console"
depends on ARM
select HVC_DRIVER
help
This console uses the JTAG DCC on ARM to create a console under the HVC
driver. This console is used through a JTAG only on ARM. If you don't have
a JTAG then you probably don't want this option.
config HVC_BFIN_JTAG
bool "Blackfin JTAG console"
depends on BLACKFIN
select HVC_DRIVER
help
This console uses the Blackfin JTAG to create a console under the
the HVC driver. If you don't have JTAG, then you probably don't
want this option.
config HVCS
tristate "IBM Hypervisor Virtual Console Server support"
depends on PPC_PSERIES && HVC_CONSOLE
help
Partitionable IBM Power5 ppc64 machines allow hosting of
firmware virtual consoles from one Linux partition by
another Linux partition. This driver allows console data
from Linux partitions to be accessed through TTY device
interfaces in the device tree of a Linux partition running
this driver.
To compile this driver as a module, choose M here: the
module will be called hvcs. Additionally, this module
will depend on arch specific APIs exported from hvcserver.ko
which will also be compiled when this driver is built as a
module.