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2015-02-09Merge branch 'sfi' of ↵Rafael J. Wysocki
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux into pm-cpufreq Pull SFI-based cpufreq driver for v3.20 from Len Brown. * 'sfi' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: cpufreq: Add SFI based cpufreq driver support SFI: fix compiler warnings
2015-02-09Merge branch 'core-rcu-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull RCU updates from Ingo Molnar: "The main RCU changes in this cycle are: - Documentation updates. - Miscellaneous fixes. - Preemptible-RCU fixes, including fixing an old bug in the interaction of RCU priority boosting and CPU hotplug. - SRCU updates. - RCU CPU stall-warning updates. - RCU torture-test updates" * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (54 commits) rcu: Initialize tiny RCU stall-warning timeouts at boot rcu: Fix RCU CPU stall detection in tiny implementation rcu: Add GP-kthread-starvation checks to CPU stall warnings rcu: Make cond_resched_rcu_qs() apply to normal RCU flavors rcu: Optionally run grace-period kthreads at real-time priority ksoftirqd: Use new cond_resched_rcu_qs() function ksoftirqd: Enable IRQs and call cond_resched() before poking RCU rcutorture: Add more diagnostics in rcu_barrier() test failure case torture: Flag console.log file to prevent holdovers from earlier runs torture: Add "-enable-kvm -soundhw pcspk" to qemu command line rcutorture: Handle different mpstat versions rcutorture: Check from beginning to end of grace period rcu: Remove redundant rcu_batches_completed() declaration rcutorture: Drop rcu_torture_completed() and friends rcu: Provide rcu_batches_completed_sched() for TINY_RCU rcutorture: Use unsigned for Reader Batch computations rcutorture: Make build-output parsing correctly flag RCU's warnings rcu: Make _batches_completed() functions return unsigned long rcutorture: Issue warnings on close calls due to Reader Batch blows documentation: Fix smp typo in memory-barriers.txt ...
2015-02-09tools/power turbostat: decode MSR_*_PERF_LIMIT_REASONSLen Brown
The Processor generation code-named Haswell added MSR_{CORE | GFX | RING}_PERF_LIMIT_REASONS to explain when and how the processor limits frequency. turbostat -v will now decode these bits. Each MSR has an "Active" set of bits which describe current conditions, and a "Logged" set of bits, which describe what has happened since last cleared. Turbostat currently doesn't clear the log bits. Signed-off-by: Len Brown <len.brown@intel.com>
2015-02-09Merge tag 'spi-v3.20' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi updates from Mark Brown: "The major highlight this release is a refactoring of the core to allow us to run synchronous transfers in the context of the caller when there is no contention for the bus. This improves performance in the very common case by eliminating context switches and reducing the number of hardware setup and teardown operations we need to perform. Other changes: - New drivers for DLN-2 USB-SPI adapter and ST SPI controllers. - A big round of cleanups, performance and feature improvements for the xilinx driver from Ricardo Ribalda Delgado. - A wide range of smaller cleanups, fixes and feature improvements throughout the subsystem" * tag 'spi-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (68 commits) spi: mxs: cleanup wait_for_completion return handling spi: ti-qspi: cleanup wait_for_completion return handling spi: spi-imx: cleanup wait_for_completion handling spi: sh-msiof: cleanup wait_for_completion return handling spi: match var type to return type of wait_for_completion spi: spi-pxa2xx: only include mach/dma.h for legacy DMA spi: atmel: cleanup wait_for_completion return handling spi: fsl-dspi: Remove possible memory leak of 'chip' spi: sh-msiof: Update calculation of frequency dividing spi: spidev: Convert buf pointers for 32-bit compat SPI_IOC_MESSAGE(n) spi/xilinx: Fix access invalid memory on xilinx_spi_tx spi: Revert "spi/xilinx: Remove iowrite/ioread wrappers" spi/xilinx: Check number of slaves range spi/xilinx: Use polling mode on small transfers spi/xilinx: Remove remaining_words driver data variable spi/xilinx: Remove iowrite/ioread wrappers spi/xilinx: Convert bits_per_word in bytes_per_word spi/xilinx: Convert remainding_bytes in remaining words spi/xilinx: Make spi_tx and spi_rx simmetric spi/xilinx: Remove rx_fn and tx_fn pointer ...
2015-02-09x86/mce: Fix regression. All error records should report via /dev/mcelogTony Luck
I'm getting complaints from validation teams that have updated their Linux kernels from ancient versions to current. They don't see the error logs they expect. I tell the to unload any EDAC drivers[1], and things start working again. The problem is that we short-circuit the logging process if any function on the decoder chain claims to have dealt with the problem: ret = atomic_notifier_call_chain(&x86_mce_decoder_chain, 0, m); if (ret == NOTIFY_STOP) return; The logic we used when we added this code was that we did not want to confuse users with double reports of the same error. But it turns out users are not confused - they are upset that they don't see a log where their tools used to find a log. I could also get into a long description of how the consumer of this log does more than just decode model specific details of the error. It keeps counts, tracks thresholds, takes actions and runs scripts that can alert administrators to problems. [1] We've recently compounded the problem because the acpi_extlog driver also registers for this notifier and also returns NOTIFY_STOP. Signed-off-by: Tony Luck <tony.luck@intel.com>
2015-02-09avr32: update all default configurationsHans-Christian Egtvedt
This patch runs all the default configurations through make silentoldconfig and make savedefconfig to rinse out outdated kconfig entries. for config in arch/avr32/configs/*defconfig; do make ARCH=avr32 `basename $config` make ARCH=avr32 silentoldconfig make ARCH=avr32 savedefconfig cp defconfig $config done Signed-off-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
2015-02-09avr32: remove fake at91 cpu identificationAlexandre Belloni
cpu_is_at91* are not used in any driver outside mach-at91. Remove those useless definitions. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-02-09avr32: wire up missing syscallsHans-Christian Egtvedt
This patch adds a bunch of missing syscalls to AVR32: __NR_pread64 __NR_pwrite64 __NR_timerfd_create __NR_fallocate __NR_timerfd_settime __NR_timerfd_gettime __NR_signalfd4 __NR_eventfd2 __NR_epoll_create1 __NR_dup3 __NR_pipe2 __NR_inotify_init1 __NR_preadv __NR_pwritev __NR_rt_tgsigqueueinfo __NR_perf_event_open __NR_recvmmsg __NR_fanotify_init __NR_fanotify_mark __NR_prlimit64 __NR_name_to_handle_at __NR_open_by_handle_at __NR_clock_adjtime __NR_syncfs __NR_sendmmsg __NR_process_vm_readv __NR_process_vm_writev __NR_kcmp __NR_finit_module __NR_sched_setattr __NR_sched_getattr __NR_renameat2 __NR_seccomp __NR_getrandom __NR_memfd_create __NR_bpf __NR_execveat On AVR32, all parameters beyond the 5th are passed on the stack. System calls don't use the stack -- they borrow a callee-saved register instead. This means that syscalls that take 6 parameters must be called through a stub that pushes the last parameter on the stack. This relates to syscall fallocate, fanotify_mark, process_vm_readv, and process_vm_writev. Signed-off-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
2015-02-09KVM: x86: emulate: correct page fault error code for NoWrite instructionsPaolo Bonzini
NoWrite instructions (e.g. cmp or test) never set the "write access" bit in the error code, even if one of the operands is treated as a destination. Fixes: c205fb7d7d4f81e46fc577b707ceb9e356af1456 Cc: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-09KVM: s390: add cpu model supportMichael Mueller
This patch enables cpu model support in kvm/s390 via the vm attribute interface. During KVM initialization, the host properties cpuid, IBC value and the facility list are stored in the architecture specific cpu model structure. During vcpu setup, these properties are taken to initialize the related SIE state. This mechanism allows to adjust the properties from user space and thus to implement different selectable cpu models. This patch uses the IBC functionality to block instructions that have not been implemented at the requested CPU type and GA level compared to the full host capability. Userspace has to initialize the cpu model before vcpu creation. A cpu model change of running vcpus is not possible. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-02-09KVM: s390: use facilities and cpu_id per KVMMichael Mueller
The patch introduces facilities and cpu_ids per virtual machine. Different virtual machines may want to expose different facilities and cpu ids to the guest, so let's make them per-vm instead of global. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-02-09KVM: s390/CPACF: Choose crypto control block formatTony Krowiak
We need to specify a different format for the crypto control block depending on whether the APXA facility is installed or not. Let's test for it by executing the PQAP(QCI) function and use either a format-1 or a format-2 crypto control block accordingly. This is a host only change for z13 and does not affect the guest view. Signed-off-by: Tony Krowiak <akrowiak@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-02-09s390/kernel: Update /proc/sysinfo file with Extended Name and UUIDEkaterina Tumanova
A new architecture extends STSI 3.2.2 with UUID and long names. KVM will provide the first implementation. This patch adds the additional data fields (Extended Name and UUID) from the 4KB block returned by the STSI 3.2.2 command and reflect this information in the /proc/sysinfo file accordingly. Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-02-09KVM: s390: reenable LPP facilityChristian Borntraeger
commit 7be81a46695d ("KVM: s390/facilities: allow TOD-CLOCK steering facility bit") accidentially disabled the "load program parameter" facility bit during rebase for upstream submission (my fault). Re-add that bit. As this is only for a performance measurement helper instruction (used by KVM itself) cc stable is not necessary see http://www-01.ibm.com/support/docview.wss?uid=isg26fcd1cc32246f4c8852574ce0044734a (SA23-2260 The Load-Program-Parameter and CPU-Measurement Facilities) for details about LPP and its usecase. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Fixes: 7be81a46695d ("KVM: s390/facilities: allow TOD-CLOCK steering")
2015-02-09KVM: s390: floating irqs: fix user triggerable endless loopDavid Hildenbrand
If a vm with no VCPUs is created, the injection of a floating irq leads to an endless loop in the kernel. Let's skip the search for a destination VCPU for a floating irq if no VCPUs were created. Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Cc: stable@vger.kernel.org # v3.15+ Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-02-09nios2: Port OOM changes to do_page_fault()Ley Foon Tan
Commit d065bd810b6d ("mm: retry page fault when blocking on disk transfer") and and commit 37b23e0525d3 ("x86,mm: make pagefault killable") The above commits introduced changes into the nios2 pagefault handler for making the page fault handler retryable as well as killable. These changes reduce the mmap_sem hold time, which is crucial during OOM killer invocation. Signed-off-by: Ley Foon Tan <lftan@altera.com>
2015-02-09Merge remote-tracking branches 'asoc/topic/rt5670', 'asoc/topic/rt5677', ↵Mark Brown
'asoc/topic/rx51', 'asoc/topic/samsung' and 'asoc/topic/sh' into asoc-next
2015-02-09Merge remote-tracking branches 'asoc/fix/ac97', 'asoc/fix/atmel', ↵Mark Brown
'asoc/fix/intel', 'asoc/fix/rt286', 'asoc/fix/rt5640', 'asoc/fix/samsung', 'asoc/fix/sgtl5000', 'asoc/fix/sta32x', 'asoc/fix/tlv320aic3x' and 'asoc/fix/wm8731' into asoc-linus
2015-02-09ARM: dts: Switch Odroid X2/U2 to simple-audio-cardSylwester Nawrocki
Now when the CDCLK I2S output clock can be handled through the clock API the Odroid X2/U3 can be switched to the simple-audio-card DT binding. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-02-09ARM: dts: Exynos4 and Odroid X2/U3 sound device nodes updateSylwester Nawrocki
Clock related properties are added to the Exynos4 I2S device nodes so they can be referred to as clock providers. Missing i2s_opclk1 clock is added to the I2S0 node and clock properties are added to the MAX98090 codec node to allow it to control/read frequency of the MCLK clock directly. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-02-09nios2: Remove unused prepare_to_copy()Tobias Klauser
prepare_to_copy() was removed from all architectures supported at that time in commit 55ccf3fe3f9a ("fork: move the real prepare_to_copy() users to arch_dup_task_struct()"). Remove it from nios2 as well. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Ley Foon Tan <lftan@altera.com>
2015-02-08Merge tag 'nios2-fixes-v3.19-final' of ↵Linus Torvalds
git://git.rocketboards.org/linux-socfpga-next Pull nios2 fix from Ley Foon Tan: "This fixes incorrect behavior of some user programs" * tag 'nios2-fixes-v3.19-final' of git://git.rocketboards.org/linux-socfpga-next: nios2: fix unhandled signals
2015-02-09nios2: fix unhandled signalsChung-Ling Tang
Follow other architectures for user fault handling. Signed-off-by: Chung-Ling Tang <cltang@codesourcery.com> Acked-by: Ley Foon Tan <lftan@altera.com>
2015-02-08Merge remote-tracking branches 'spi/topic/atmel', 'spi/topic/config', ↵Mark Brown
'spi/topic/dln2' and 'spi/topic/dw' into spi-next
2015-02-06Merge branches 'timers-urgent-for-linus' and 'x86-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer and x86 fix from Ingo Molnar: "A CLOCK_TAI early expiry fix and an x86 microcode driver oops fix" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: hrtimer: Fix incorrect tai offset calculation for non high-res timer systems * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, microcode: Return error from driver init code when loader is disabled
2015-02-06Merge tag 'sound-3.19' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "Hopefully the final pull request for 3.19: this ended up with a slightly higher volume than wished, but I put them all as they are either stable or 3.19 regression fixes. Most of commits are from ASoC, and have been stewed for a while in linux-next. The only change in the common code is the regression fixes for ASoC AC97 stuff wrt device registrations. The rest are device-specific, mostly small fixes in various ASoC drivers and ak411x on ice1724 boards" * tag 'sound-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ASoC: Intel: fix sst firmware path for cht-bsw-rt5672 ARM: dts: Fix I2S1, I2S2 compatible for exynos4 SoCs ASoC: sgtl5000: add delay before first I2C access MAINTAINERS: ASoC: add maintainer for Intel BDW/HSW ASoC driver ASoC: atmel_ssc_dai: fix the setting for DSP mode ASoC: sgtl5000: Use shift mask when setting codec mode ASoC: tlv320aic3x: Fix data delay configuration ALSA: ak411x: Fix stall in work callback ASoC: Intel: Used lock version to update shim registers ASoC: wm8731: init mutex in i2c init path ASoC: atmel_ssc_dai: fix start event for I2S mode ASoC: rt5640: Add RT5642 ACPI ID for Intel Baytrail ASoC: wm97xx: Reset AC'97 device before registering it ASoC: Add support for allocating AC'97 device before registering it
2015-02-06ARM: 8297/1: cache-l2x0: optimize aurora range operationsArnd Bergmann
The aurora_inv_range(), aurora_clean_range() and aurora_flush_range() functions are highly redundant, both in source and in object code, and they are harder to understand than necessary. By moving the range loop into the aurora_pa_range() function, they become trivial wrappers, and the object code start looking like what one would expect for an optimal implementation. Further optimization may be possible by using the per-CPU "virtual" registers to avoid the spinlocks in most cases. (on Armada 370 RD and Armada XP GP, boot tested, plus a little bit of DMA traffic by reading data from a SD card) Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-02-06ARM: 8296/1: cache-l2x0: clean up aurora cache handlingArnd Bergmann
The aurora cache controller is the only remaining user of a couple of functions in this file and are completely unused when that is disabled, leading to build warnings: arch/arm/mm/cache-l2x0.c:167:13: warning: 'l2x0_cache_sync' defined but not used [-Wunused-function] arch/arm/mm/cache-l2x0.c:184:13: warning: 'l2x0_flush_all' defined but not used [-Wunused-function] arch/arm/mm/cache-l2x0.c:194:13: warning: 'l2x0_disable' defined but not used [-Wunused-function] With the knowledge that the code is now aurora-specific, we can simplify it noticeably: - The pl310 errata workarounds are not needed on aurora and can be removed - As confirmed by Thomas Petazzoni from the data sheet, the cache_wait() macro is never needed. - No need to hold the lock across atomic cache sync - We can load the l2x0_base into a local variable across operations There should be no functional change in this patch, but readability and the generated object code improves, along with avoiding the warnings. (on Armada 370 RD and Armada XP GP, boot tested, plus a little bit of DMA traffic by reading data from a SD card) Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-02-06Merge branch 'akpm' (patches from Andrew Morton)Linus Torvalds
Merge misc fixes from Andrew Morton: "7 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mm/debug_pagealloc: fix build failure on ppc and some other archs nilfs2: fix deadlock of segment constructor over I_SYNC flag MAINTAINERS: remove SUPERH website memcg, shmem: fix shmem migration to use lrucare mm: export "high_memory" symbol on !MMU .mailmap: update Konstantin Khlebnikov's email address mm: pagewalk: call pte_hole() for VM_PFNMAP during walk_page_range
2015-02-06Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds
Pull MIPS fixes from Ralf Baechle: "The pending MIPS fixes for 3.19. All across the field and nothing particularly severe or dramatic" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (23 commits) IRQCHIP: mips-gic: Avoid rerouting timer IRQs for smp-cmp MIPS: Fix syscall_get_nr for the syscall exit tracing. MIPS: elf2ecoff: Ignore PT_MIPS_ABIFLAGS program headers. MIPS: elf2ecoff: Rewrite main processing loop to switch. MIPS: fork: Fix MSA/FPU/DSP context duplication race MIPS: Fix C0_Pagegrain[IEC] support. MIPS: traps: Fix inline asm ctc1 missing .set hardfloat MIPS: mipsregs.h: Add write_32bit_cp1_register() MIPS: Fix kernel lockup or crash after CPU offline/online MIPS: OCTEON: fix kernel crash when offlining a CPU MIPS: ARC: Fix build error. MIPS: IRQ: Fix disable_irq on CPU IRQs MIPS: smp-mt,smp-cmp: Enable all HW IRQs on secondary CPUs MIPS: Fix restart of indirect syscalls MIPS: ELF: fix loading o32 binaries on 64-bit kernels MIPS: mips-cm: Fix sparse warnings MIPS: Kconfig: Fix recursive dependency. MIPS: Compat: Fix build error if CONFIG_MIPS32_COMPAT but no compat ABI. MIPS: JZ4740: Fixup #include's (sparse) MIPS: Wire up execveat(2). ...
2015-02-06ACPI: add AMD ACPI2Platform device support for x86 systemKen Xue
This new feature is to interpret AMD specific ACPI device to platform device such as I2C, UART, GPIO found on AMD CZ and later chipsets. It based on example intel LPSS. Now, it can support AMD I2C, UART and GPIO. Signed-off-by: Ken Xue <Ken.Xue@amd.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-02-06kvm: add halt_poll_ns module parameterPaolo Bonzini
This patch introduces a new module parameter for the KVM module; when it is present, KVM attempts a bit of polling on every HLT before scheduling itself out via kvm_vcpu_block. This parameter helps a lot for latency-bound workloads---in particular I tested it with O_DSYNC writes with a battery-backed disk in the host. In this case, writes are fast (because the data doesn't have to go all the way to the platters) but they cannot be merged by either the host or the guest. KVM's performance here is usually around 30% of bare metal, or 50% if you use cache=directsync or cache=writethrough (these parameters avoid that the guest sends pointless flush requests, and at the same time they are not slow because of the battery-backed cache). The bad performance happens because on every halt the host CPU decides to halt itself too. When the interrupt comes, the vCPU thread is then migrated to a new physical CPU, and in general the latency is horrible because the vCPU thread has to be scheduled back in. With this patch performance reaches 60-65% of bare metal and, more important, 99% of what you get if you use idle=poll in the guest. This means that the tunable gets rid of this particular bottleneck, and more work can be done to improve performance in the kernel or QEMU. Of course there is some price to pay; every time an otherwise idle vCPUs is interrupted by an interrupt, it will poll unnecessarily and thus impose a little load on the host. The above results were obtained with a mostly random value of the parameter (500000), and the load was around 1.5-2.5% CPU usage on one of the host's core for each idle guest vCPU. The patch also adds a new stat, /sys/kernel/debug/kvm/halt_successful_poll, that can be used to tune the parameter. It counts how many HLT instructions received an interrupt during the polling period; each successful poll avoids that Linux schedules the VCPU thread out and back in, and may also avoid a likely trip to C1 and back for the physical CPU. While the VM is idle, a Linux 4 VCPU VM halts around 10 times per second. Of these halts, almost all are failed polls. During the benchmark, instead, basically all halts end within the polling period, except a more or less constant stream of 50 per second coming from vCPUs that are not running the benchmark. The wasted time is thus very low. Things may be slightly different for Windows VMs, which have a ~10 ms timer tick. The effect is also visible on Marcelo's recently-introduced latency test for the TSC deadline timer. Though of course a non-RT kernel has awful latency bounds, the latency of the timer is around 8000-10000 clock cycles compared to 20000-120000 without setting halt_poll_ns. For the TSC deadline timer, thus, the effect is both a smaller average latency and a smaller variance. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-06Merge tag 'samsung-cpuidle' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/drivers Merge "Samsung CPUIdle updates for v3.20" from Kukjin Kim: - adds coupled cpuidle support for exynos4210 : fix for Exynos platform PM code preparing it for the coupled cpuidle support and adds coupled cpuidle AFTR mode on exynos4210 Note this is mostrly based on earlier cpuidle-exynos4210 driver from Daniel Lezcano and Bart updated. * tag 'samsung-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: cpuidle: exynos: add coupled cpuidle support for exynos4210 ARM: EXYNOS: apply S5P_CENTRAL_SEQ_OPTION fix only when necessary Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-06Merge tag 'samsung-dt-4' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/dt Merge "Samsung 4th DT updates for v3.20" from Kukjin Kim: - For exynos4 SoCs : add PPMU node : add syscon phandle for video-phy node - For exynos4415 SoC : add mipi dsi and fimd device nodes - For exynos3250-monk and exynos3250-rinato boards : add PPMU node - For exynos4412-trats2 board : add maxim77693 fuel gauge and battery charger nodes : fix regarding CLK_MOUT_CAMn parent and CLK_UART_ISP_SCLK clocks : switch max77686 regulators to GPIO control : add suspend configuration for max77686 regulators : add PPMU node and sound nodes * tag 'samsung-dt-4' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: dts: Add PPMU node for exynos4412-trats2 ARM: dts: Add PPMU node for exynos3250-monk and exynos3250-rinato ARM: dts: Add PPMU dt node for exynos4 and exynos4210 ARM: dts: Add PPMU dt node for exynos3250 ARM: dts: add mipi dsi device node for exynos4415 ARM: dts: add fimd device node for exynos4415 ARM: dts: Add syscon phandle to the video-phy node for Exynos4 ARM: dts: Add sound nodes for exynos4412-trats2 ARM: dts: Fix CLK_MOUT_CAMn parent clocks assignment for exynos4412-trats2 ARM: dts: Fix CLK_UART_ISP_SCLK clock assignment in exynos4x12.dtsi ARM: dts: Add max77693 charger node for exynos4412-trats2 ARM: dts: Switch max77686 regulators to GPIO control for exynos4412-trats2 ARM: dts: Add suspend configuration for max77686 regulators for exynos4412-trats2 ARM: dts: Add Maxim 77693 fuel gauge node for exynos4412-trats2 Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-06Merge tag 'samsung-defconfig' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/defconfig Merge "Samsung exynos_defconfig updates for v3.20" from Kukjin Kim: - Enable CONFIG_LOCKUP_DETECTOR : to detect hard lockup and soft lockup - Enable PMIC and MUIC : for battery charger, fuel-gauge, regulators - Enable CONFIG_FHANDLE : this is required by systemd * tag 'samsung-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: exynos_defconfig: Enable CONFIG_FHANDLE ARM: exynos_defconfig: Enable PMIC and MUIC drivers for Gears and Trats2 ARM: exynos_defconfig: Enable CONFIG_LOCKUP_DETECTOR ARM: exynos_defconfig: Enable LM90 driver Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-06Merge tag 'mvebu-dt-3.20-3' of git://git.infradead.org/linux-mvebu into next/dtOlof Johansson
Merge "ARM: mvebu: DT changes for v3.20 (round 2)" from Gregory CLEMENT: Relicense all Armada dts{i} files under dual license of GPLv2+ and X11. This should make it easier to reuse these files with other operating systems and boot loaders. * tag 'mvebu-dt-3.20-3' of git://git.infradead.org/linux-mvebu: (27 commits) ARM: mvebu: armada-xp-synology-ds414: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-xp-openblocks-ax3-4: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-xp-netgear-rn2120: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-xp-mv78460: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-xp-mv78260: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-xp-mv78230: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-xp-matrix: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-xp-lenovo-ix4-300d: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-xp-gp: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-xp: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-xp-db: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-xp-axpwifiap: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-38x: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-388-rd: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-385: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-388-db: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-380: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-375: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-375-db: Relicense the device tree under GPLv2+/X11 ARM: mvebu: armada-370-xp: Relicense the device tree under GPLv2+/X11 ... Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-06ARM: sirf: drop redundant function and marco declarationBarry Song
with the patchset to add CSR atlas7 support, the below stuff has no user now: SIRFSOC_VA sirfsoc_map_lluart sirfsoc_map_scu the related patches missed to drop them. Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-06Merge tag 'keystone-soc' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into next/defconfig Merge "ARM: Keystone soc config updates for 3.20" from Santosh Shilimkar: Keystone DEVTMPFS config update for 3.20 * tag 'keystone-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone: ARM: config: add DEVTMPFS option by default to keystone config Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-06arm: omap: specify PMUs are for ARMv7 CPUsMark Rutland
Now that we can specify which PMU variant we're likely to deal with, do so in the omap board code. This will allow us to split the ARMv6, ARMv7, and XScale PMU drivers. The unnecessary include of asm/pmu.h is also removed. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Olof Johansson <olof@lixom.net> Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-06arm: shmobile: specify PMUs are for ARMv7 CPUsMark Rutland
Now that we can specify which PMU variant we're likely to deal with, do so in the shmobile board code. This will allow us to split the ARMv6, ARMv7, and XScale PMU drivers Signed-off-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Simon Horman <horms+renesas@verge.net.au> Acked-by: Simon Horman <horms+renesas@verge.net.au> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: Olof Johansson <olof@lixom.net> Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-06arm: iop: specify PMUs are for XScale CPUsMark Rutland
Now that we can specify which PMU variant we're likely to deal with, do so in the iop board code. This will allow us to split the ARMv6, ARMv7, and XScale PMU drivers. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Olof Johansson <olof@lixom.net> Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-06arm: pxa: specify PMUs are for XScale CPUsMark Rutland
Now that we can specify which PMU variant we're likely to deal with, do so in the pxa board code. This will allow us to split the ARMv6, ARMv7, and XScale PMU drivers. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Daniel Mack <daniel@zonque.org> Cc: Haojian Zhuang <haojian.zhuang@gmail.com> Cc: Olof Johansson <olof@lixom.net> Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-06arm: realview: specify PMU typesMark Rutland
Now that we can specify which PMU variant we're likely to deal with, do so in the realview board code. This will allow us to split the ARMv6, ARMv7, and XScale PMU drivers. The Realview EB may be used with ARMv6 or ARMv7 CPUs, but luckily there's only a single ARMv7 CPU, so we can match that explicitly to determine whether or not we have an ARMv7 PMU. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Olof Johansson <olof@lixom.net> Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-06Merge tag 'omap-for-v3.20/dt-pt3-v2' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/dt Merge "omap device tree changes for v3.20, part 3" from Tony Lindgren: Device tree related chages for omaps to fix dm816x syscon, fix various devices for gta04, and add USB nodes for am57xx and dra7. * tag 'omap-for-v3.20/dt-pt3-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: dts: am57xx-beagle-x15: Fix USB2 mode ARM: dts: am57xx-beagle-x15: Add extcon nodes for USB ARM: dts: dra72-evm: Add extcon nodes for USB ARM: dts: dra7-evm: Add extcon nodes for USB ARM: dts: Fix dm816x pinctrl and syscon so they are children of SCM ARM: dts: omap3-gta04: Disable keypad ARM: dts: omap3-gta04: only power DSS when necessary. ARM: dts: omap3-gta04: add gyroscope ARM: dts: omap3-gta04: enable power-off for wifi card. ARM: dts: omap3-gta04: add comments about gpios ARM: dts: omap3-gta04: Add ramp value for twl4030 audio ARM: dts: omap3-gta04: Enable power-off using twl4030 ARM: dts: omap3-gta04: Fix a GPIO line for bma180 node ARM: dts: omap3-gta04: Enable twl audio vibra support ARM: dts: omap3-gta04: Enable mcbps2 necessary for audio ARM: dts: omap3-gta04: Fix audio node malformatting ARM: dts: omap3-gta04: Fix backup-battery charging in devicetree file. Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-06Merge tag 'v3.20-rockchip-dts3' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into next/dt Merge "ARM: rockchip: third (and last) batch of dts updates for 3.20" from Heiko Stübner: Change are regulator nodes for the cpu and gpu regulators on the act8846 variant of the rk3288-evb and the setting of a clock for the watchdog. Also the lcd and hdmi controllers on both the firefly and the evb get enabled and let us now boot into fbcon console sucessfully. * tag 'v3.20-rockchip-dts3' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip: ARM: dts: rockchip: move the hdmi ddc-i2c-bus property to the actual boards ARM: dts: rockchip: enable vops and hdmi output on rk3288-firefly and -evb ARM: dts: rockchip: housekeeping off i2c0 on rk3288-evb boards ARM: dts: rockchip: add cpu and gpu regulators to rk3288-evb-act8846 ARM: dts: rockchip: add rk3288 watchdog clock clk: rockchip: add id for watchdog pclk on rk3288 clk: rockchip: add clock IDs for the PVTM clocks clk: rockchip: add clock ID for usbphy480m_src Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-05Merge tag 'at91-soc4' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91 into next/soc Merge "at91: cleanup/soc for 3.20 #4" from Nicolas Ferre: Fourth cleanup/soc batch for 3.20: - merge all the at91sam9 code and remove the empty SoC-specific files - remove the at91_boot_soc that is now useless in a DT context - move the sram code in PM code as it's now only used there - some file + function name changes after this big cleanup * tag 'at91-soc4' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91: ARM: at91/trivial: unify functions and machine names ARM: at91: remove at91_dt_initialize and machine init_early() ARM: at91: change board files into SoC files ARM: at91: remove at91_boot_soc ARM: at91: move alternative initial mapping to board-dt-sama5.c ARM: at91: merge all SOC_AT91SAM9xxx ARM: at91: at91rm9200: set idle and restart from rm9200_dt_device_init() ARM: at91: board-dt-sama5: add phy_fixup to override NAND_Tree ARM: at91/dt: sam9263: Add missing clocks to lcdc node ARM: at91: sama5d3: dt: correct the sound route ARM: at91/dt: sama5d4: fix the timer reg length Signed-off-by: Olof Johansson <olof@lixom.net>
2015-02-06ACPI / table: remove duplicate NULL check for the handler of acpi_table_parse()Hanjun Guo
In acpi_table_parse(), pointer of the table to pass to handler() is checked before handler() called, so remove all the duplicate NULL check in the handler function. CC: Tony Luck <tony.luck@intel.com> CC: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-02-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Conflicts: drivers/net/vxlan.c drivers/vhost/net.c include/linux/if_vlan.h net/core/dev.c The net/core/dev.c conflict was the overlap of one commit marking an existing function static whilst another was adding a new function. In the include/linux/if_vlan.h case, the type used for a local variable was changed in 'net', whereas the function got rewritten to fix a stacked vlan bug in 'net-next'. In drivers/vhost/net.c, Al Viro's iov_iter conversions in 'net-next' overlapped with an endainness fix for VHOST 1.0 in 'net'. In drivers/net/vxlan.c, vxlan_find_vni() added a 'flags' parameter in 'net-next' whereas in 'net' there was a bug fix to pass in the correct network namespace pointer in calls to this function. Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-05mm/debug_pagealloc: fix build failure on ppc and some other archsJoonsoo Kim
Kim Phillips reported following build failure. LD init/built-in.o mm/built-in.o: In function `free_pages_prepare': mm/page_alloc.c:770: undefined reference to `.kernel_map_pages' mm/built-in.o: In function `prep_new_page': mm/page_alloc.c:933: undefined reference to `.kernel_map_pages' mm/built-in.o: In function `map_pages': mm/compaction.c:61: undefined reference to `.kernel_map_pages' make: *** [vmlinux] Error 1 Reason for this problem is that commit 031bc5743f15 ("mm/debug-pagealloc: make debug-pagealloc boottime configurable") forgot to remove the old declaration of kernel_map_pages() for some architectures. This patch removes them to fix build failure. Reported-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: David Miller <davem@davemloft.net> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-05Merge remote-tracking branch 'asoc/fix/samsung' into asoc-linusMark Brown