linux/drivers/idle, branch v3.12.24

intel_idle: close avn_cstates array with correct marker

2014-06-27T08:25:12Z

commit 88390996c95b879ba365888199b45ace3f5ca80b upstream. Close avn_cstates array with correct marker to avoid overflow in function intel_idle_cpu_init(). [rjw: The problem was introduced when commit 22e580d07f65 was merged on top of eba682a5aeb6 (intel_idle: shrink states tables).] Fixes: 22e580d07f65 (intel_idle: Fixed C6 state on Avoton/Rangeley processors) Signed-off-by: Jiang Liu Signed-off-by: Rafael J. Wysocki Signed-off-by: Jiri Slaby

intel_idle: Fixed C6 state on Avoton/Rangeley processors

2014-04-03T08:32:08Z

commit 22e580d07f6529a395c129575127ea6d860aed3a upstream. Corrected the MWAIT flag for C-State C6 on Intel Avoton/Rangeley processors. Signed-off-by: Arne Bockholdt Acked-by: Len Brown Signed-off-by: Rafael J. Wysocki Signed-off-by: Jiri Slaby

intel_idle: Support Intel Atom Processor C2000 Product Family

2014-04-01T20:12:09Z

commit fab04b2208dd1d4121319f0096c5a5f4b70abc54 upstream. Support the "Intel(R) Atom(TM) Processor C2000 Product Family", formerly code-named Avoton. It is based on the next generation Intel Atom processor architecture, formerly code-named Silvermont. Signed-off-by: Len Brown Signed-off-by: Rafael J. Wysocki Signed-off-by: Jiri Slaby

x86 idle: Repair large-server 50-watt idle-power regression

2014-01-09T20:25:09Z

commit 40e2d7f9b5dae048789c64672bf3027fbb663ffa upstream. Linux 3.10 changed the timing of how thread_info->flags is touched: x86: Use generic idle loop (7d1a941731fabf27e5fb6edbebb79fe856edb4e5) This caused Intel NHM-EX and WSM-EX servers to experience a large number of immediate MONITOR/MWAIT break wakeups, which caused cpuidle to demote from deep C-states to shallow C-states, which caused these platforms to experience a significant increase in idle power. Note that this issue was already present before the commit above, however, it wasn't seen often enough to be noticed in power measurements. Here we extend an errata workaround from the Core2 EX "Dunnington" to extend to NHM-EX and WSM-EX, to prevent these immediate returns from MWAIT, reducing idle power on these platforms. While only acpi_idle ran on Dunnington, intel_idle may also run on these two newer systems. As of today, there are no other models that are known to need this tweak. Link: http://lkml.kernel.org/r/CAJvTdK=%2BaNN66mYpCGgbHGCHhYQAKx-vB0kJSWjVpsNb_hOAtQ@mail.gmail.com Signed-off-by: Len Brown Link: http://lkml.kernel.org/r/baff264285f6e585df757d58b17788feabc68918.1387403066.git.len.brown@intel.com Signed-off-by: H. Peter Anvin Signed-off-by: Greg Kroah-Hartman

sched, idle: Fix the idle polling state logic

2013-11-29T19:27:55Z

commit ea8117478918a4734586d35ff530721b682425be upstream. Mike reported that commit 7d1a9417 ("x86: Use generic idle loop") regressed several workloads and caused excessive reschedule interrupts. The patch in question failed to notice that the x86 code had an inverted sense of the polling state versus the new generic code (x86: default polling, generic: default !polling). Fix the two prominent x86 mwait based idle drivers and introduce a few new generic polling helpers (fixing the wrong smp_mb__after_clear_bit usage). Also switch the idle routines to using tif_need_resched() which is an immediate TIF_NEED_RESCHED test as opposed to need_resched which will end up being slightly different. Reported-by: Mike Galbraith Signed-off-by: Peter Zijlstra Cc: lenb@kernel.org Cc: tglx@linutronix.de Link: http://lkml.kernel.org/n/tip-nc03imb0etuefmzybzj7sprf@git.kernel.org Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux

2013-05-11T22:23:17Z

Pull idle update from Len Brown: "Add support for new Haswell-ULT CPU idle power states" * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: intel_idle: initial C8, C9, C10 support tools/power turbostat: display C8, C9, C10 residency

Merge branch 'pm-cpuidle'

2013-04-27T23:54:49Z

* pm-cpuidle: (51 commits) cpuidle: add maintainer entry ARM: s3c64xx: cpuidle: use init/exit common routine SH: cpuidle: use init/exit common routine cpuidle: fix comment format ARM: imx: cpuidle: use init/exit common routine ARM: davinci: cpuidle: use init/exit common routine ARM: kirkwood: cpuidle: use init/exit common routine ARM: calxeda: cpuidle: use init/exit common routine ARM: tegra: cpuidle: use init/exit common routine for tegra3 ARM: tegra: cpuidle: use init/exit common routine for tegra2 ARM: OMAP4: cpuidle: use init/exit common routine ARM: shmobile: cpuidle: use init/exit common routine ARM: tegra: cpuidle: use init/exit common routine ARM: OMAP3: cpuidle: use init/exit common routine ARM: at91: cpuidle: use init/exit common routine ARM: ux500: cpuidle: use init/exit common routine cpuidle: make a single register function for all ARM: ux500: cpuidle: replace for_each_online_cpu by for_each_possible_cpu cpuidle: remove en_core_tk_irqen flag ARM: OMAP3: remove cpuidle_wrap_enter ...

cpuidle: remove en_core_tk_irqen flag

2013-04-23T11:45:22Z

The en_core_tk_irqen flag is set in all the cpuidle driver which means it is not necessary to specify this flag. Remove the flag and the code related to it. Signed-off-by: Daniel Lezcano Acked-by: Kevin Hilman # for mach-omap2/* Signed-off-by: Rafael J. Wysocki

intel_idle: remove stop/start critical timings

2013-04-21T22:21:29Z

The start/stop_critical_timings are called from arch/x86/kernel/process.c in the cpu_idle loop function. Remove the ones in the cpuidle driver. Signed-off-by: Daniel Lezcano Acked-by: Len Brown Signed-off-by: Rafael J. Wysocki

intel_idle: initial C8, C9, C10 support

2013-04-17T23:23:32Z

Allow intel_idle and cpuidle to utilize C8, C9, C10 when they are present on... "Fourth Generation Intel(R) Core(TM) Processors", which are based on Intel(R) microarchitecture code name Haswell. Signed-off-by: Len Brown