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Date: Wed, 03 Aug 2011 16:54:23 -0400 (EDT)
From: Len Brown <lenb@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org
Subject: [GIT PULL] idle patches for Linux 3.1
Hi Linus,
please pull from:
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6.git idle-release
A new power management driver for Moorestown
(essentially a platform idle driver).
Plus some small cpuidle cleanups that were on the list in April.
The cpuidle patches set the stage for adding p-series
support to cpuidle -- possibly by 3.2.
This will update the files shown below.
thanks!
Len Brown
Intel Open Source Technology Center
ps. individual patches are available on linux-pm@...ts.linux-foundation.org
Documentation/kernel-parameters.txt | 3 +
MAINTAINERS | 6 +
arch/arm/kernel/process.c | 4 +-
arch/sh/kernel/idle.c | 6 +-
arch/x86/include/asm/processor.h | 2 -
arch/x86/kernel/acpi/cstate.c | 23 +
arch/x86/kernel/process.c | 23 -
arch/x86/kernel/process_32.c | 4 +-
arch/x86/kernel/process_64.c | 4 +-
arch/x86/platform/mrst/Makefile | 1 +
arch/x86/platform/mrst/pmu.c | 817 +++++++++++++++++++++++++++++++++++
arch/x86/platform/mrst/pmu.h | 234 ++++++++++
arch/x86/xen/setup.c | 3 +-
drivers/cpuidle/cpuidle.c | 50 ++-
drivers/cpuidle/cpuidle.h | 1 +
drivers/cpuidle/driver.c | 3 +
drivers/cpuidle/governor.c | 3 +
include/linux/cpuidle.h | 4 +
18 files changed, 1141 insertions(+), 50 deletions(-)
create mode 100644 arch/x86/platform/mrst/pmu.c
create mode 100644 arch/x86/platform/mrst/pmu.h
through these commits:
Len Brown (5):
mrst_pmu: driver for Intel Moorestown Power Management Unit
cpuidle: create bootparam "cpuidle.off=1"
cpuidle: replace xen access to x86 pm_idle and default_idle
x86 idle: move mwait_idle_with_hints() to where it is used
cpuidle: stop depending on pm_idle
with this log:
commit 619b3f9e65307529dd4bbc98efe9d2f3b632646c
Author: Len Brown <len.brown@...el.com>
Date: Fri Apr 1 19:34:59 2011 -0400
cpuidle: stop depending on pm_idle
cpuidle users should call cpuidle_call_idle() directly
rather than via (pm_idle)() function pointer.
Architecture may choose to continue using (pm_idle)(),
but cpuidle need not depend on it:
my_arch_cpu_idle()
...
if(cpuidle_call_idle())
pm_idle();
cc: x86@...nel.org
cc: Kevin Hilman <khilman@...prootsystems.com>
cc: Paul Mundt <lethal@...ux-sh.org>
Signed-off-by: Len Brown <len.brown@...el.com>
commit 779d881fbcdf840e23a9bd3e237aebca4e0376e8
Author: Len Brown <len.brown@...el.com>
Date: Wed Mar 30 23:52:29 2011 -0400
x86 idle: move mwait_idle_with_hints() to where it is used
...and make it static
no functional change
cc: x86@...nel.org
Signed-off-by: Len Brown <len.brown@...el.com>
commit 0c70c6b12c37ececbfa9b7734495835514f273a4
Author: Len Brown <len.brown@...el.com>
Date: Fri Apr 1 18:28:35 2011 -0400
cpuidle: replace xen access to x86 pm_idle and default_idle
When a Xen Dom0 kernel boots on a hypervisor, it gets access
to the raw-hardware ACPI tables. While it parses the idle tables
for the hypervisor's beneift, it uses HLT for its own idle.
Rather than have xen scribble on pm_idle and access default_idle,
have it simply disable_cpuidle() so acpi_idle will not load and
architecture default HLT will be used.
cc: xen-devel@...ts.xensource.com
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Signed-off-by: Len Brown <len.brown@...el.com>
commit 3928f8d7ba2df07e391e390f9526c06774b84063
Author: Len Brown <len.brown@...el.com>
Date: Fri Apr 1 18:13:10 2011 -0400
cpuidle: create bootparam "cpuidle.off=1"
useful for disabling cpuidle to fall back
to architecture-default idle loop
cpuidle drivers and governors will fail to register.
on x86 they'll say so:
intel_idle: intel_idle yielding to (null)
ACPI: acpi_idle yielding to (null)
Signed-off-by: Len Brown <len.brown@...el.com>
commit 8e24ed2af46a5d008d85bfeb128d25efc394a3fd
Author: Len Brown <len.brown@...el.com>
Date: Tue Jul 12 22:29:32 2011 -0400
mrst_pmu: driver for Intel Moorestown Power Management Unit
The Moorestown (MRST) Power Management Unit (PMU) driver
directs the SOC power states in the "Langwell" south complex (SCU).
It hooks pci_platform_pm_ops[] and thus observes all PCI ".set_state"
requests. For devices in the SC, the pmu driver translates those
PCI requests into the appropriate commands for the SCU.
The PMU driver helps implement S0i3, a deep system idle power idle state.
Entry into S0i3 is via cpuidle, just like regular processor c-states.
S0i3 depends on pre-conditions including uni-processor, graphics off,
and certain IO devices in the SC must be off. If those pre-conditions
are met, then the PMU allows cpuidle to enter S0i3, otherwise such requests
are demoted, either to Atom C4 or Atom C6.
This driver is based on prototype work by Bruce Flemming,
Illyas Mansoor, Rajeev D. Muralidhar, Vishwesh M. Rudramuni,
Hari Seshadri and Sujith Thomas. The current driver also
includes contributions from H. Peter Anvin, Arjan van de Ven,
Kristen Accardi, and Yong Wang.
Thanks for additional review feedback from Alan Cox and Randy Dunlap.
Signed-off-by: Len Brown <len.brown@...el.com>
Acked-by: Alan Cox <alan@...ux.intel.com>
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