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* x86, k8: Fix section mismatch for powernowk8_exit()Borislav Petkov2010-05-25
| | | | | | | | | | | | | | | | | | | Fix the following warning: "WARNING: arch/x86/kernel/built-in.o(.exit.text+0x72): Section mismatch in reference from the function powernowk8_exit() to the variable .cpuinit.data:cpb_nb The function __exit powernowk8_exit() references a variable __cpuinitdata cpb_nb. This is often seen when error handling in the exit function uses functionality in the init path. The fix is often to remove the __cpuinitdata annotation of cpb_nb so it may be used outside an init section." Cc: <stable@kernel.org> Reported-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> LKML-Reference: <20100525152858.GA24836@aftab> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* Merge commit 'v2.6.34-rc6' into x86/cpuH. Peter Anvin2010-05-08
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| * include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* | powernow-k8: Fix frequency reportingMark Langsdorf2010-04-09
| | | | | | | | | | | | | | | | | | | | | | With F10, model 10, all valid frequencies are in the ACPI _PST table. Cc: <stable@kernel.org> # 33.x 32.x Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> LKML-Reference: <1270065406-1814-6-git-send-email-bp@amd64.org> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> Reviewed-by: Thomas Renninger <trenn@suse.de> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | x86, cpufreq: Add APERF/MPERF support for AMD processorsMark Langsdorf2010-04-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Starting with model 10 of Family 0x10, AMD processors may have support for APERF/MPERF. Add support for identifying it and using it within cpufreq. Move the APERF/MPERF functions out of the acpi-cpufreq code and into their own file so they can easily be shared. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> LKML-Reference: <20100401141956.GA1930@aftab> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> Reviewed-by: Thomas Renninger <trenn@suse.de> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | powernow-k8: Add core performance boost supportBorislav Petkov2010-04-09
|/ | | | | | | | | | | | | | | | | | | | | | | | Starting with F10h, revE, AMD processors add support for a dynamic core boosting feature called Core Performance Boost. When a specific condition is present, a subset of the cores on a system are boosted beyond their P0 operating frequency to speed up the performance of single-threaded applications. In the normal case, the system comes out of reset with core boosting enabled. This patch adds a sysfs knob with which core boosting can be switched on or off for benchmarking purposes. While at it, make the CPB code hotplug-aware so that taking cores offline wouldn't interfere with boosting the remaining online cores. Furthermore, add cpu_online_mask hotplug protection as suggested by Andrew. Finally, cleanup the driver init codepath and update copyrights. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> LKML-Reference: <1270065406-1814-3-git-send-email-bp@amd64.org> Reviewed-by: Thomas Renninger <trenn@suse.de> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* Merge branch 'next' of ↵Linus Torvalds2010-03-07
|\ | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] Fix cast warning in pcc driver. [CPUFREQ] Processor Clocking Control interface driver
| * [CPUFREQ] Fix cast warning in pcc driver.Dave Jones2010-01-13
| | | | | | | | | | | | arch/x86/kernel/cpu/cpufreq/pcc-cpufreq.c:458: warning: cast from pointer to integer of different size Signed-off-by: Dave Jones <davej@redhat.com>
| * [CPUFREQ] Processor Clocking Control interface driverNaga Chumbalkar2010-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Processor Clocking Control (PCC) is an interface between the BIOS and OSPM. Based on the server workload, OSPM can request what frequency it expects from a logical CPU, and the BIOS will achieve that frequency transparently. This patch introduces driver support for PCC. OSPM uses the PCC driver to communicate with the BIOS via the PCC interface. There is a Documentation file that provides a link to the PCC Specification, and also provides a summary of the PCC interface. Currently, certain HP ProLiant platforms implement the PCC interface. However, any platform whose BIOS implements the PCC Specification, can utilize this driver. V2 --> V1 changes (based on Dominik's suggestions): - Removed the dependency on CPU_FREQ_TABLE - "cpufreq_stats" will no longer PANIC. Actually, it will not load anymore because it is not applicable. - Removed the sanity check for target frequency in the ->target routine. NOTE: A patch to sanitize the target frequency requested by "ondemand" is needed to ensure that the target freq < policy->min. Can this driver be queued up for the 2.6.33 tree? Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com> Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Dave Jones <davej@redhat.com>
* | Merge branch 'acpica' of ↵Linus Torvalds2010-03-01
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'acpica' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: ACPI: replace acpi_integer by u64 ACPICA: Update version to 20100121. ACPICA: Remove unused uint32_struct type ACPICA: Disassembler: Remove obsolete "Integer64" field in parse object ACPICA: Remove obsolete ACPI_INTEGER (acpi_integer) type ACPICA: Predefined name repair: fix NULL package elements ACPICA: AcpiGetDevices: Eliminate unnecessary _STA calls ACPICA: Update all ACPICA copyrights and signons to 2010 ACPICA: Update for new gcc-4 warning options
| * | ACPI: replace acpi_integer by u64Lin Ming2010-01-28
| | | | | | | | | | | | | | | | | | | | | | | | acpi_integer is now obsolete and removed from the ACPICA code base, replaced by u64. Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
* | | Merge branch 'fixes' of ↵Linus Torvalds2010-02-08
|\ \ \ | |/ / |/| / | |/ | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] Fix ondemand to not request targets outside policy limits [CPUFREQ] Fix use after free of struct powernow_k8_data [CPUFREQ] fix default value for ondemand governor
| * [CPUFREQ] Fix use after free of struct powernow_k8_dataThomas Renninger2010-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Easy fix for a regression introduced in 2.6.31. On managed CPUs the cpufreq.c core will call driver->exit(cpu) on the managed cpus and powernow_k8 will free the core's data. Later driver->get(cpu) function might get called trying to read out the current freq of a managed cpu and the NULL pointer check does not work on the freed object -> better set it to NULL. ->get() is unsigned and must return 0 as invalid frequency. Reference: http://bugzilla.kernel.org/show_bug.cgi?id=14391 Signed-off-by: Thomas Renninger <trenn@suse.de> Tested-by: Michal Schmidt <mschmidt@redhat.com> CC: stable@kernel.org Signed-off-by: Dave Jones <davej@redhat.com>
* | arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c: avoid cross-CPU interrupts by ↵Andrew Morton2009-12-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | using smp_call_function_any() Presently acpi-cpufreq will perform the MSR read on the first CPU in the mask. That's inefficient if that CPU differs from the current CPU. Because we have to perform a cross-CPU call, but we could have run the rdmsr on the current CPU. So switch to using the new smp_call_function_any(), which will perform the call on the current CPU if that CPU is present in the mask (it is). Cc: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com> Cc: Dave Jones <davej@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Jaswinder Singh Rajput <jaswinder@kernel.org> Cc: Len Brown <len.brown@intel.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
* | cpumask: rename tsk_cpumask to tsk_cpus_allowedRusty Russell2009-12-16
|/ | | | | | | | | | | Noone uses this wrapper yet, and Ingo asked that it be kept consistent with current task_struct usage. (One user crept in via linux-next: fixed) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au. Cc: Ingo Molnar <mingo@elte.hu> Cc: Tejun Heo <tj@kernel.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2009-12-14
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (34 commits) m68k: rename global variable vmalloc_end to m68k_vmalloc_end percpu: add missing per_cpu_ptr_to_phys() definition for UP percpu: Fix kdump failure if booted with percpu_alloc=page percpu: make misc percpu symbols unique percpu: make percpu symbols in ia64 unique percpu: make percpu symbols in powerpc unique percpu: make percpu symbols in x86 unique percpu: make percpu symbols in xen unique percpu: make percpu symbols in cpufreq unique percpu: make percpu symbols in oprofile unique percpu: make percpu symbols in tracer unique percpu: make percpu symbols under kernel/ and mm/ unique percpu: remove some sparse warnings percpu: make alloc_percpu() handle array types vmalloc: fix use of non-existent percpu variable in put_cpu_var() this_cpu: Use this_cpu_xx in trace_functions_graph.c this_cpu: Use this_cpu_xx for ftrace this_cpu: Use this_cpu_xx in nmi handling this_cpu: Use this_cpu operations in RCU this_cpu: Use this_cpu ops for VM statistics ... Fix up trivial (famous last words) global per-cpu naming conflicts in arch/x86/kvm/svm.c mm/slab.c
| * percpu: make percpu symbols in cpufreq uniqueTejun Heo2009-10-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch updates percpu related symbols in cpufreq such that percpu symbols are unique and don't clash with local symbols. This serves two purposes of decreasing the possibility of global percpu symbol collision and allowing dropping per_cpu__ prefix from percpu symbols. * drivers/cpufreq/cpufreq.c: s/policy_cpu/cpufreq_policy_cpu/ * drivers/cpufreq/freq_table.c: s/show_table/cpufreq_show_table/ * arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c: s/drv_data/acfreq_data/ s/old_perf/acfreq_old_perf/ Partly based on Rusty Russell's "alloc_percpu: rename percpu vars which cause name clashes" patch. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Rusty Russell <rusty@rustcorp.com.au>
* | Merge branch 'next' of ↵Linus Torvalds2009-12-11
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [ACPI/CPUFREQ] Introduce bios_limit per cpu cpufreq sysfs interface [CPUFREQ] make internal cpufreq_add_dev_* static [CPUFREQ] use an enum for speedstep processor identification [CPUFREQ] Document units for transition latency [CPUFREQ] Use global sysfs cpufreq structure for conservative governor tunings [CPUFREQ] Documentation: ABI: /sys/devices/system/cpu/cpu#/cpufreq/ [CPUFREQ] powernow-k6: set transition latency value so ondemand governor can be used [CPUFREQ] cpumask: don't put a cpumask on the stack in x86...cpufreq/powernow-k8.c
| * | [ACPI/CPUFREQ] Introduce bios_limit per cpu cpufreq sysfs interfaceThomas Renninger2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This interface is mainly intended (and implemented) for ACPI _PPC BIOS frequency limitations, but other cpufreq drivers can also use it for similar use-cases. Why is this needed: Currently it's not obvious why cpufreq got limited. People see cpufreq/scaling_max_freq reduced, but this could have happened by: - any userspace prog writing to scaling_max_freq - thermal limitations - hardware (_PPC in ACPI case) limitiations Therefore export bios_limit (in kHz) to: - Point the user that it's the BIOS (broken or intended) which limits frequency - Export it as a sysfs interface for userspace progs. While this was a rarely used feature on laptops, there will appear more and more server implemenations providing "Green IT" features like allowing the service processor to limit the frequency. People want to know about HW/BIOS frequency limitations. All ACPI P-state driven cpufreq drivers are covered with this patch: - powernow-k8 - powernow-k7 - acpi-cpufreq Tested with a patched DSDT which limits the first two cores (_PPC returns 1) via _PPC, exposed by bios_limit: # echo 2200000 >cpu2/cpufreq/scaling_max_freq # cat cpu*/cpufreq/scaling_max_freq 2600000 2600000 2200000 2200000 # #scaling_max_freq shows general user/thermal/BIOS limitations # cat cpu*/cpufreq/bios_limit 2600000 2600000 2800000 2800000 # #bios_limit only shows the HW/BIOS limitation CC: Pallipadi Venkatesh <venkatesh.pallipadi@intel.com> CC: Len Brown <lenb@kernel.org> CC: davej@codemonkey.org.uk CC: linux@dominikbrodowski.net Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] use an enum for speedstep processor identificationRusty Russell2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The "unsigned int processor" everywhere confused Rusty, leading to breakage when he passed in smp_processor_id(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] powernow-k6: set transition latency value so ondemand governor can ↵Krzysztof Helt2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | be used Set the transition latency to value smaller than CPUFREQ_ETERNAL so governors other than "performance" work (like the "ondemand" one). The value is found in "AMD PowerNow! Technology Platform Design Guide for Embedded Processors" dated December 2000 (AMD doc #24267A). There is the answer to one of FAQs on page 40 which states that suggested complete transition period is 200 us. Tested on K6-2+ CPU with K6-3 core (model 13, stepping 4). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] cpumask: don't put a cpumask on the stack in ↵Rusty Russell2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | x86...cpufreq/powernow-k8.c It's still mugging the current process's cpumask, but as comment in 1ff6e97f1d says, it's not a trivial fix. So, at least we can use a cpumask_var_t to do the Wrong Thing the Right Way :) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> To: cpufreq@vger.kernel.org Cc: Mark Langsdorf <mark.langsdorf@amd.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | ACPICA: Add post-order callback to acpi_walk_namespaceLin Ming2009-11-24
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | The existing interface only has a pre-order callback. This change adds an additional parameter for a post-order callback which will be more useful for bus scans. ACPICA BZ 779. Also update the external calls to acpi_walk_namespace. http://www.acpica.org/bugzilla/show_bug.cgi?id=779 Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
* | [CPUFREQ] speedstep-ich: fix error caused by ↵Rusty Russell2009-11-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 394122ab144dae4b276d74644a2f11c44a60ac5c "[CPUFREQ] cpumask: avoid playing with cpus_allowed in speedstep-ich.c" changed the code to mistakenly pass the current cpu as the "processor" argument of speedstep_get_frequency(), whereas it should be the type of the processor. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=14340 Based on a patch by Dave Mueller. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Dominik Brodowski <linux@brodo.de> Reported-by: Dave Mueller <dave.mueller@gmx.ch> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Jones <davej@redhat.com>
* | [CPUFREQ] acpi-cpufreq: blacklist Intel 0f68: Fix HT detection and put in ↵John Villalovos2009-11-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | notification message Removing the SMT/HT check, since the Errata doesn't mention Hyper-Threading. Adding in a printk, so that the user knows why acpi-cpufreq refuses to load. Also, once system is blacklisted, don't repeat checks to see if blacklisted. This also causes the message to only be printed once, rather than for each CPU. Signed-off-by: John L. Villalovos <john.l.villalovos@intel.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | [CPUFREQ] powernow-k8: Fix test in get_transition_latency()Roel Kluin2009-11-17
| | | | | | | | | | | | | | Not makes it a bool before the comparison. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | [CPUFREQ] longhaul: select Longhaul version 2 for capable CPUsKrzysztof Helt2009-11-17
|/ | | | | | | | | | | There is a typo in the longhaul detection code so only Longhaul v1 or Longhaul v3 is selected. The Longhaul v2 is not selected even for CPUs which are capable of. Tested on PCChips Giga Pro board. Frequency changes work and the Longhaul v2 detects that the board is not capable of changing CPU voltage. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Dave Jones <davej@redhat.com>
* Merge branch 'perfcounters-core-for-linus' of ↵Linus Torvalds2009-09-20
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perfcounters-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (58 commits) perf_counter: Fix perf_copy_attr() pointer arithmetic perf utils: Use a define for the maximum length of a trace event perf: Add timechart help text and add timechart to "perf help" tracing, x86, cpuidle: Move the end point of a C state in the power tracer perf utils: Be consistent about minimum text size in the svghelper perf timechart: Add "perf timechart record" perf: Add the timechart tool perf: Add a SVG helper library file tracing, perf: Convert the power tracer into an event tracer perf: Add a sample_event type to the event_union perf: Allow perf utilities to have "callback" options without arguments perf: Store trace event name/id pairs in perf.data perf: Add a timestamp to fork events sched_clock: Make it NMI safe perf_counter: Fix up swcounter throttling x86, perf_counter, bts: Optimize BTS overflow handling perf sched: Add --input=file option to builtin-sched.c perf trace: Sample timestamp and cpu when using record flag perf tools: Increase MAX_EVENT_LENGTH perf tools: Fix memory leak in read_ftrace_printk() ...
| * tracing, perf: Convert the power tracer into an event tracerArjan van de Ven2009-09-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch converts the existing power tracer into an event tracer, so that power events (C states and frequency changes) can be tracked via "perf". This also removes the perl script that was used to demo the tracer; its functionality is being replaced entirely with timechart. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20090912130542.6d314860@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'next' of ↵Linus Torvalds2009-09-18
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] Fix NULL ptr regression in powernow-k8 [CPUFREQ] Create a blacklist for processors that should not load the acpi-cpufreq module. [CPUFREQ] Powernow-k8: Enable more than 2 low P-states [CPUFREQ] remove rwsem lock from CPUFREQ_GOV_STOP call (second call site) [CPUFREQ] ondemand - Use global sysfs dir for tuning settings [CPUFREQ] Introduce global, not per core: /sys/devices/system/cpu/cpufreq [CPUFREQ] Bail out of cpufreq_add_dev if the link for a managed CPU got created [CPUFREQ] Factor out policy setting from cpufreq_add_dev [CPUFREQ] Factor out interface creation from cpufreq_add_dev [CPUFREQ] Factor out symlink creation from cpufreq_add_dev [CPUFREQ] cleanup up -ENOMEM handling in cpufreq_add_dev [CPUFREQ] Reduce scope of cpu_sys_dev in cpufreq_add_dev [CPUFREQ] update Doc for cpuinfo_cur_freq and scaling_cur_freq
| * [CPUFREQ] Fix NULL ptr regression in powernow-k8Kurt Roeckx2009-09-16
| | | | | | | | | | | | | | Fixes bugzilla #13780 From: Kurt Roeckx <kurt@roeckx.be> Signed-off-by: Dave Jones <davej@redhat.com>
| * [CPUFREQ] Create a blacklist for processors that should not load the ↵Prarit Bhargava2009-09-01
| | | | | | | | | | | | | | | | | | | | | | | | | | acpi-cpufreq module. Create a blacklist for processors that should not load the acpi-cpufreq module. The initial entry in the blacklist function is the Intel 0f68 processor. It's specification update mentions errata AL30 which implies that cpufreq should not run on this processor. Signed-off-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Dave Jones <davej@redhat.com>
| * [CPUFREQ] Powernow-k8: Enable more than 2 low P-statesMark Langsdorf2009-09-01
| | | | | | | | | | | | | | | | | | | | | | Remove an obsolete check that used to prevent there being more than 2 low P-states. Now that low-to-low P-states changes are enabled, it prevents otherwise workable configurations with multiple low P-states. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> Tested-by: Krists Krilovs <pow@pow.za.net> Signed-off-by: Dave Jones <davej@redhat.com>
* | x86: Add generic aperf/mperf codePeter Zijlstra2009-09-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move some of the aperf/mperf code out from the cpufreq driver thingy so that other people can enjoy it too. Cc: H. Peter Anvin <hpa@zytor.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> Cc: Dave Jones <davej@redhat.com> Cc: Len Brown <len.brown@intel.com> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: cpufreq@vger.kernel.org Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | x86: Move APERF/MPERF into a X86_FEATUREPeter Zijlstra2009-09-15
|/ | | | | | | | | | | | | | | | Move the APERFMPERF capacility into a X86_FEATURE flag so that it can be used outside of the acpi cpufreq driver. Cc: H. Peter Anvin <hpa@zytor.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> Cc: Dave Jones <davej@redhat.com> Cc: Len Brown <len.brown@intel.com> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: cpufreq@vger.kernel.org Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Remove multiple KERN_ prefixes from printk formatsJoe Perches2009-07-08
| | | | | | | | | | | | | | Commit 5fd29d6ccbc98884569d6f3105aeca70858b3e0f ("printk: clean up handling of log-levels and newlines") changed printk semantics. printk lines with multiple KERN_<level> prefixes are no longer emitted as before the patch. <level> is now included in the output on each additional use. Remove all uses of multiple KERN_<level>s in formats. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [CPUFREQ] Powernow-k8: support family 0xf with 2 low p-statesMark Langsdorf2009-07-06
| | | | | | | | | | Provide support for family 0xf processors with 2 P-states below the elevator voltage. Remove the checks that prevent this configuration from being supported and increase the transition voltage to prevent errors during the transition. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> Signed-off-by: Dave Jones <davej@redhat.com>
* [CPUFREQ] cpumask: new cpumask operators for ↵Rusty Russell2009-06-15
| | | | | | | | | | | | | arch/x86/kernel/cpu/cpufreq/powernow-k8.c Remove all old-style cpumask operators, and cpumask_t. Also: get rid of the unused define_siblings function. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Mark Langsdorf <mark.langsdorf@amd.com> Tested-by: Mark Langsdorf <mark.langsdorf@amd.com> Signed-off-by: Dave Jones <davej@redhat.com>
* [CPUFREQ] cpumask: avoid playing with cpus_allowed in powernow-k8.cRusty Russell2009-06-15
| | | | | | | | | | | | | | | | | | cpumask: avoid playing with cpus_allowed in powernow-k8.c It's generally a very bad idea to mug some process's cpumask: it could legitimately and reasonably be changed by root, which could break us (if done before our code) or them (if we restore the wrong value). I did not replace powernowk8_target; it needs fixing, but it grabs a mutex (so no smp_call_function_single here) but Mark points out it can be called multiple times per second, so work_on_cpu is too heavy. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> To: cpufreq@vger.kernel.org Acked-by: Mark Langsdorf <mark.langsdorf@amd.com> Tested-by: Mark Langsdorf <mark.langsdorf@amd.com> Signed-off-by: Dave Jones <davej@redhat.com>
* [CPUFREQ] cpumask: avoid cpumask games in ↵Rusty Russell2009-06-15
| | | | | | | | | | | | | | | | | arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c Impact: don't play with current's cpumask It's generally a very bad idea to mug some process's cpumask: it could legitimately and reasonably be changed by root, which could break us (if done before our code) or them (if we restore the wrong value). Use rdmsr_on_cpu and wrmsr_on_cpu instead. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> To: cpufreq@vger.kernel.org Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Dave Jones <davej@redhat.com>
* [CPUFREQ] cpumask: avoid playing with cpus_allowed in speedstep-ich.cRusty Russell2009-06-15
| | | | | | | | | | | | | | | | Impact: don't play with current's cpumask It's generally a very bad idea to mug some process's cpumask: it could legitimately and reasonably be changed by root, which could break us (if done before our code) or them (if we restore the wrong value). We use smp_call_function_single: this had the advantage of being more efficient, too. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> To: cpufreq@vger.kernel.org Cc: Dominik Brodowski <linux@brodo.de> Signed-off-by: Dave Jones <davej@redhat.com>
* [CPUFREQ] powernow-k8: get drv data for correct CPUNaga Chumbalkar2009-06-15
| | | | | | | | | | | | | | | | Make powernowk8_get() similar to powernowk8_target() and powernowk8_verify() in the way it obtains "powernow_data" for a given CPU. Cc: Andreas Herrmann <andreas.herrmann3@amd.com> Cc: Langsdorf, Mark <mark.langsdorf@amd.com> Cc: Thomas Renninger <trenn@suse.de> Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com> Reviewed-by: Andreas Herrmann <andreas.herrmann3@amd.com> Tested-by: Andreas Herrmann <andreas.herrmann3@amd.com> Acked-by: Langsdorf, Mark <mark.langsdorf@amd.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Dave Jones <davej@redhat.com>
* [CPUFREQ] powernow-k8: read P-state from HWNaga Chumbalkar2009-06-15
| | | | | | | | | | | | | | | | | By definition, "cpuinfo_cur_freq" should report the value from HW. So, don't depend on the cached value. Instead read P-state directly from HW, while taking into account the erratum 311 workaround for Fam 11h processors. Cc: Andreas Herrmann <andreas.herrmann3@amd.com> Cc: Langsdorf, Mark <mark.langsdorf@amd.com> Cc: Thomas Renninger <trenn@suse.de> Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com> Reviewed-by: Andreas Herrmann <andreas.herrmann3@amd.com> Tested-by: Andreas Herrmann <andreas.herrmann3@amd.com> Acked-by: Langsdorf, Mark <mark.langsdorf@amd.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Dave Jones <davej@redhat.com>
* [CPUFREQ] reduce scope of ACPI_PSS_BIOS_BUG_MSG[]Andrew Morton2009-06-15
| | | | | | | | | | | | | This symbol doesn't need file-global scope. Cc: "Zhang, Rui" <rui.zhang@intel.com> Cc: Dave Jones <davej@codemonkey.org.uk> Cc: Ingo Molnar <mingo@elte.hu> Cc: Langsdorf, Mark <mark.langsdorf@amd.com> Cc: Leo Milano <lmilano@gmx.net> Cc: Thomas Renninger <trenn@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Jones <davej@redhat.com>
* [CPUFREQ] powernow-k8.c: mess cleanupLuis Henriques2009-06-15
| | | | | | | Mess cleanup in powernow_k8_acpi_pst_values() function. Signed-off-by: Luis Henriques <henrix@sapo.pt> Signed-off-by: Dave Jones <davej@redhat.com>
* [CPUFREQ] powernow-k8: Set transition latency to 1 if ACPI tables export 0Thomas Renninger2009-06-15
| | | | | | | | | This doesn't fix anything, but it's expected that a transition latency of 0 could cause trouble in the future. Signed-off-by: Thomas Renninger <trenn@suse.de> Cc: Langsdorf, Mark <mark.langsdorf@amd.com> Signed-off-by: Dave Jones <davej@redhat.com>
* CPUFREQ: Mark e_powersaver driver as EXPERIMENTAL and DANGEROUSHarald Welte2009-06-10
| | | | | | | | | | | | | The e_powersaver driver for VIA's C7 CPU's needs to be marked as DANGEROUS as it configures the CPU to power states that are out of specification. According to Centaur, all systems with C7 and Nano CPU's support the ACPI p-state method. Thus, the acpi-cpufreq driver should be used instead. Signed-off-by: Harald Welte <HaraldWelte@viatech.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* CPUFREQ: Enable acpi-cpufreq driver for VIA/Centaur CPUsHarald Welte2009-06-10
| | | | | | | | | | The VIA/Centaur C7, C7-M and Nano CPU's all support ACPI based cpu p-states using a MSR interface. The Linux driver just never made use of it, since in addition to the check for the EST flag it also checked if the vendor is Intel. Signed-off-by: Harald Welte <HaraldWelte@viatech.com> [ Removed the vendor checks entirely - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cpumask: alloc zeroed cpumask for static cpumask_var_tsYinghai Lu2009-06-09
| | | | | | | | These are defined as static cpumask_var_t so if MAXSMP is not used, they are cleared already. Avoid surprises when MAXSMP is enabled. Signed-off-by: Yinghai Lu <yinghai.lu@kernel.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* [CPUFREQ] powernow-k8: check space_id of _PCT registers to be FFHDave Jones2009-06-05
| | | | | | | | | | | | | | The powernow-k8 driver checks to see that the Performance Control/Status Registers are declared as FFH (functional fixed hardware) by the BIOS. However, this check got broken in the commit: 0e64a0c982c06a6b8f5e2a7f29eb108fdf257b2f [CPUFREQ] checkpatch cleanups for powernow-k8 Fix based on an original patch from Naga Chumbalkar. Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com> Cc: Mark Langsdorf <mark.langsdorf@amd.com> Signed-off-by: Dave Jones <davej@redhat.com>
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