litmus-rt.git/arch/powerpc/platforms/pseries/Kconfig, branch master

powerpc/nvram: Move generic code for nvram and pstore

2015-03-23T03:05:49+00:00

With minor checks, we can move most of the code for nvram
under pseries to a common place to be re-used by other
powerpc platforms like powernv. This patch moves such
common code to arch/powerpc/kernel/nvram_64.c file.

Signed-off-by: Hari Bathini 
[mpe: Move select of ZLIB_DEFLATE to PPC64 to fix the build]
Signed-off-by: Michael Ellerman

powerpc/pseries: relocate "config DTL" so kconfig nests properly

2014-12-29T04:45:42+00:00

Moving config DTL up so it is below config PPC_SPLPAR means that
menuconfig will show config DTL nicely indented right below config
PPC_SPLPAR when PPC_SPLPAR is enabled.

To contrast that, right now if I enable PPC_SPLPAR in menuconfig, all I
can immediately tell is that "something showed up further down the list
where I wasn't looking", and I end up having to toggle the option a few
times to figure out what showed up, or look at the KConfig to find out
that config DTL depends on config PPC_SPLPAR.

Signed-off-by: Cody P Schafer 
Signed-off-by: Michael Ellerman

powerpc/powernv: Enable POWER8 doorbell IPIs

2014-06-11T07:05:12+00:00

This patch enables POWER8 doorbell IPIs on powernv.

Since doorbells can only IPI within a core, we test to see when we can use
doorbells and if not we fall back to XICS.  This also enables hypervisor
doorbells to wakeup us up from nap/sleep via the LPCR PECEDH bit.

Based on tests by Anton, the best case IPI latency between two threads dropped
from 894ns to 512ns.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc/perf: Add kconfig option for hypervisor provided counters

2014-03-23T22:48:32+00:00

The commit adds a Kconfig option which allows the hv_gpci and hv_24x7
PMUs, added in the preceeding commits, to be built.

Signed-off-by: Cody P Schafer 
Signed-off-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt

powerpc/pseries: Select ARCH_RANDOM on pseries

2014-02-11T00:24:49+00:00

We have a driver for the ARCH_RANDOM hook in rng.c, so we should select
ARCH_RANDOM on pseries.

Without this the build breaks if you turn ARCH_RANDOM off.

This hasn't broken the build because pseries_defconfig doesn't specify a
value for PPC_POWERNV, which is default y, and selects ARCH_RANDOM.

Signed-off-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt

powerpc/pseries/cpuidle: Move processor_idle.c to drivers/cpuidle.

2014-01-29T06:02:22+00:00

Move the file from arch specific pseries/processor_idle.c
to drivers/cpuidle/cpuidle-pseries.c
Make the relevant Makefile and Kconfig changes.
Also, introduce Kconfig.powerpc in drivers/cpuidle
for all powerpc cpuidle drivers.

Signed-off-by: Deepthi Dharwar 
Signed-off-by: Benjamin Herrenschmidt

powerpc/pseries: CONFIG_PSERIES_MSI should depend on PPC_PSERIES

2013-12-02T03:16:05+00:00

Previously PSERIES_MSI depended on PPC_PSERIES via EEH. However in
commit 317f06d "powerpc/eeh: Move common part to kernel directory" we
made CONFIG_EEH selectable on POWERNV. That leaves us with PSERIES_MSI
being live even when PSERIES=n. Fix it by making PSERIES_MSI depend
directly on PPC_PSERIES.

Signed-off-by: Michael Ellerman 
Reviewed-by: Gavin Shan 
Signed-off-by: Benjamin Herrenschmidt

powerpc/pseries: Drop "select HOTPLUG"

2013-07-24T04:18:44+00:00

The Kconfig symbol HOTPLUG was removed with commit 40b313608a ("Finally
eradicate CONFIG_HOTPLUG"). But there's still one select statement for
that symbol. It seems that select statement was added after the patch to
remove CONFIG_HOTPLUG was submitted. Anyhow, it is useless and can be
dropped.

Signed-off-by: Paul Bolle 
Reviewed-by: Srivatsa S. Bhat 
Signed-off-by: Benjamin Herrenschmidt

powerpc/eeh: Move common part to kernel directory

2013-06-20T07:05:35+00:00

The patch moves the common part of EEH core into arch/powerpc/kernel
directory so that we needn't PPC_PSERIES while compiling POWERNV
platform:

        * Move the EEH common part into arch/powerpc/kernel
        * Move the functions for PCI hotplug from pSeries platform to
          arch/powerpc/kernel/pci-hotplug.c
        * Move CONFIG_EEH from arch/powerpc/platforms/pseries/Kconfig to
          arch/powerpc/platforms/Kconfig
        * Adjust makefile accordingly

Signed-off-by: Gavin Shan 
Signed-off-by: Benjamin Herrenschmidt

powerpc/pseries: Always enable CONFIG_HOTPLUG_CPU on PSERIES SMP

2013-05-31T22:29:27+00:00

Adam Lackorzynski reported the following build failure on
!CONFIG_HOTPLUG_CPU configuration:

  CC      arch/powerpc/kernel/rtas.o
arch/powerpc/kernel/rtas.c: In function ‘rtas_cpu_state_change_mask’:
arch/powerpc/kernel/rtas.c:843:4: error: implicit declaration of function ‘cpu_down’ [-Werror=implicit-function-declaration]
cc1: all warnings being treated as errors
make[1]: *** [arch/powerpc/kernel/rtas.o] Error 1
make: *** [arch/powerpc/kernel] Error 2

The build fails because cpu_down() is defined only under CONFIG_HOTPLUG_CPU.

Looking further, the mobility code in pseries is one of the call-sites which
uses rtas_ibm_suspend_me(), which in turn calls rtas_cpu_state_change_mask().
And the mobility code is unconditionally compiled-in (it does not fall under
any Kconfig option). And commit 120496ac (powerpc: Bring all threads online
prior to migration/hibernation) which introduced this build regression is
critical for the proper functioning of the migration code. So it appears
that the only solution to this problem is to enable CONFIG_HOTPLUG_CPU if
SMP is enabled on PPC_PSERIES platforms. So make that change in the Kconfig.

Reported-by: Adam Lackorzynski 
Cc: stable@vger.kernel.org
Signed-off-by: Srivatsa S. Bhat 
Signed-off-by: Benjamin Herrenschmidt