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2014-12-20Merge tag 'for-linus' of ↵Linus Torvalds6-22/+16
git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux Pull ACCESS_ONCE cleanup preparation from Christian Borntraeger: "kernel: Provide READ_ONCE and ASSIGN_ONCE As discussed on LKML http://marc.info/?i=54611D86.4040306%40de.ibm.com ACCESS_ONCE might fail with specific compilers for non-scalar accesses. Here is a set of patches to tackle that problem. The first patch introduce READ_ONCE and ASSIGN_ONCE. If the data structure is larger than the machine word size memcpy is used and a warning is emitted. The next patches fix up several in-tree users of ACCESS_ONCE on non-scalar types. This does not yet contain a patch that forces ACCESS_ONCE to work only on scalar types. This is targetted for the next merge window as Linux next already contains new offenders regarding ACCESS_ONCE vs. non-scalar types" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux: s390/kvm: REPLACE barrier fixup with READ_ONCE arm/spinlock: Replace ACCESS_ONCE with READ_ONCE arm64/spinlock: Replace ACCESS_ONCE READ_ONCE mips/gup: Replace ACCESS_ONCE with READ_ONCE x86/gup: Replace ACCESS_ONCE with READ_ONCE x86/spinlock: Replace ACCESS_ONCE with READ_ONCE mm: replace ACCESS_ONCE with READ_ONCE or barriers kernel: Provide READ_ONCE and ASSIGN_ONCE
2014-12-20Merge tag 'clk-for-linus-3.19' of ↵Linus Torvalds20-148/+157
git://git.linaro.org/people/mike.turquette/linux Pull clk framework updates from Mike Turquette: "This is much later than usual due to several last minute bugs that had to be addressed. As usual the majority of changes are new drivers and modifications to existing drivers. The core recieved many fixes along with the groundwork for several large changes coming in the future which will better parition clock providers from clock consumers" * tag 'clk-for-linus-3.19' of git://git.linaro.org/people/mike.turquette/linux: (86 commits) clk: samsung: Fix Exynos 5420 pinctrl setup and clock disable failure due to domain being gated ARM: OMAP3: clock: fix boot breakage in legacy mode ARM: OMAP2+: clock: fix DPLL code to use new determine rate APIs clk: Really fix deadlock with mmap_sem clk: mmp: fix sparse non static symbol warning clk: Change clk_ops->determine_rate to return a clk_hw as the best parent clk: change clk_debugfs_add_file to take a struct clk_hw clk: Don't expose __clk_get_accuracy clk: Don't try to use a struct clk* after it could have been freed clk: Remove unused function __clk_get_prepare_count clk: samsung: Fix double add of syscore ops after driver rebind clk: samsung: exynos4: set parent of sclk_hdmiphy to hdmi clk: samsung: exynos4415: Fix build with PM_SLEEP disabled clk: samsung: remove unnecessary inclusion of header files from clk.h clk: samsung: remove unnecessary CONFIG_OF from clk.c clk: samsung: Spelling s/bwtween/between/ clk: rockchip: Add support for the mmc clock phases using the framework clk: rockchip: add bindings for the mmc clocks clk: rockchip: rk3288 export i2s0_clkout for use in DT clk: rockchip: use clock ID for DMC (memory controller) on rk3288 ...
2014-12-20Merge tag 'pm-config-3.19-rc1' of ↵Linus Torvalds33-35/+30
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull CONFIG_PM_RUNTIME elimination from Rafael Wysocki: "This removes the last few uses of CONFIG_PM_RUNTIME introduced recently and makes that config option finally go away. CONFIG_PM will be available directly from the menu now and also it will be selected automatically if CONFIG_SUSPEND or CONFIG_HIBERNATION is set" * tag 'pm-config-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: PM: Eliminate CONFIG_PM_RUNTIME tty: 8250_omap: Replace CONFIG_PM_RUNTIME with CONFIG_PM sound: sst-haswell-pcm: Replace CONFIG_PM_RUNTIME with CONFIG_PM spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM
2014-12-19Merge branch 'for-linus' of ↵Linus Torvalds8-27/+38
git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel Pull arch/hexagon updates from Richard Kuo: "Build cleanup and a few misc fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel: Hexagon: fix signal delivery for debug traps Hexagon: set ARCH_DMA_MINALIGN Hexagon: fix alignment of init_task in RW_DATA_SECTION hexagon: Fix build failures in linux-next
2014-12-19Merge tag 'cris-changes-for-3.19' of ↵Linus Torvalds16-814/+1039
git://git.kernel.org/pub/scm/linux/kernel/git/jesper/cris Pull arch/chris updates from Jesper Nilsson: "Mostly cleanup and build fixes for CRISv32 allmodconfig God Jul och Gott Nytt år!" * tag 'cris-changes-for-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/jesper/cris: CRISv32: Remove last remnants of ETRAX_SPI_MMC_BOARD CRISv32: ETRAXFS: Fix recursive spinlock CRISv32: Select MTDRAM for axisflashmap CRISv32: Implement early console CRIS: Use KALLSYMs if available in call stack dump CRISv32: Fix declaration mismatch CRISv32: Rewrite of synchronous serial port driver CRIS: Update init memory handling CRISv32: Better handling of watchdog bite CRIS: Export missing function symbols CRIS: Export ioremap_nocache CRIS: Fix headers_install CRISv32: Add missing include for mm.h CRISv32: Drop obsolete file for SPI driver
2014-12-19Merge tag 'please-pull-misc-3.19' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux Pull ia64 __get_cpu_var removal from Tony Luck: "__get_cpu_var removed from rest of tree, drop reference from comments in arch/ia64" * tag 'please-pull-misc-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux: [IA64] Update comment that references __get_cpu_var
2014-12-20CRISv32: Remove last remnants of ETRAX_SPI_MMC_BOARDJesper Nilsson1-7/+0
There are no users of this symbol left. Reported-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-20CRISv32: ETRAXFS: Fix recursive spinlockJesper Nilsson2-71/+83
Move pinmux alloc/dealloc code into functions that don't take the spinlock so we can use from code that has the spinlock already. CRISv32 has no working SMP, so spinlocks becomes a NOP, so deadlock was never seen. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-20CRISv32: Select MTDRAM for axisflashmapJesper Nilsson1-0/+1
Fixes compile error on allmodconfig. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-20CRISv32: Implement early consoleJesper Nilsson1-26/+56
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-20CRIS: Use KALLSYMs if available in call stack dumpJesper Nilsson1-27/+34
Also, print kernel version on oops. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-20CRISv32: Fix declaration mismatchJesper Nilsson1-1/+0
Drop i2c_init from this header, it was declared non-static here, but static in the C-file. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-20CRISv32: Rewrite of synchronous serial port driverJesper Nilsson1-639/+791
Make driver possible to load as a module and try to handle locking better. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-20CRIS: Update init memory handlingJesper Nilsson1-5/+33
- Add free_initrd_mem as found by Guenter Roeck <linux@roeck-us.net> - Add free_init_pages - Export empty_zero_page symbol Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-20CRISv32: Better handling of watchdog biteJesper Nilsson1-11/+17
Don't enter watchdog handling if we're already in watchdog handling. Also some minor formatting tweaks. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-20CRIS: Export missing function symbolsJesper Nilsson3-19/+19
strcmp was lost when all other string functions were removed, but we still have an optimized version for this on CRISv32, so any driver built as a module would not have access to this symbol. In a similar manner, we had optimized versions of csum_partial_copy_from_user and __do_clear_user but no exported symbols for them, breaking bunch of other drivers when built as a module. At the same time, move EXPORT_SYMBOL(__copy_user) and EXPORT_SYMBOL(__copy_user_zeroing) C-files so it's located together with the function definition. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-20CRIS: Export ioremap_nocacheJesper Nilsson1-1/+2
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-20CRIS: Fix headers_installSam Ravnborg2-6/+2
Fix headers_install by adjusting the path to arch files. And delete unused Kbuild file. Drop special handling of cris in the headers.sh script as a nice side-effect. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-20CRISv32: Add missing include for mm.hJesper Nilsson1-0/+1
Fixes the following compile error. arch/cris/arch-v32/kernel/time.c: In function 'reset_watchdog': arch/cris/arch-v32/kernel/time.c:121:2: error: implicit declaration of function 'global_page_state' Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-19CRISv32: Drop obsolete file for SPI driverJesper Nilsson1-1/+0
File was already deleted. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2014-12-19Merge branch 'x86-apic-for-linus' of ↵Linus Torvalds25-1254/+1573
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 apic updates from Thomas Gleixner: "After stopping the full x86/apic branch, I took some time to go through the first block of patches again, which are mostly cleanups and preparatory work for the irqdomain conversion and ioapic hotplug support. Unfortunaly one of the real problematic commits was right at the beginning, so I rebased this portion of the pending patches without the offenders. It would be great to get this into 3.19. That makes reworking the problematic parts simpler. The usual tip testing did not unearth any issues and it is fully bisectible now. I'm pretty confident that this wont affect the calmness of the xmas season. Changes: - Split the convoluted io_apic.c code into domain specific parts (vector, ioapic, msi, htirq) - Introduce proper helper functions to retrieve irq specific data instead of open coded dereferencing of pointers - Preparatory work for ioapic hotplug and irqdomain conversion - Removal of the non functional pci-ioapic driver - Removal of unused irq entry stubs - Make native_smp_prepare_cpus() preemtible to avoid GFP_ATOMIC allocations for everything which is called from there. - Small cleanups and fixes" * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits) iommu/amd: Use helpers to access irq_cfg data structure associated with IRQ iommu/vt-d: Use helpers to access irq_cfg data structure associated with IRQ x86: irq_remapping: Use helpers to access irq_cfg data structure associated with IRQ x86, irq: Use helpers to access irq_cfg data structure associated with IRQ x86, irq: Make MSI and HT_IRQ indepenent of X86_IO_APIC x86, irq: Move IRQ initialization routines from io_apic.c into vector.c x86, irq: Move IOAPIC related declarations from hw_irq.h into io_apic.h x86, irq: Move HT IRQ related code from io_apic.c into htirq.c x86, irq: Move PCI MSI related code from io_apic.c into msi.c x86, irq: Replace printk(KERN_LVL) with pr_lvl() utilities x86, irq: Make UP version of irq_complete_move() an inline stub x86, irq: Move local APIC related code from io_apic.c into vector.c x86, irq: Introduce helpers to access struct irq_cfg x86, irq: Protect __clear_irq_vector() with vector_lock x86, irq: Rename local APIC related functions in io_apic.c as apic_xxx() x86, irq: Refine hw_irq.h to prepare for irqdomain support x86, irq: Convert irq_2_pin list to generic list x86, irq: Kill useless parameter 'irq_attr' of IO_APIC_get_PCI_irq_vector() x86, irq, acpi: Get rid of special handling of GSI for ACPI SCI x86, irq: Introduce helper to check whether an IOAPIC has been registered ...
2014-12-19PM: Eliminate CONFIG_PM_RUNTIMERafael J. Wysocki33-35/+30
Having switched over all of the users of CONFIG_PM_RUNTIME to use CONFIG_PM directly, turn the latter into a user-selectable option and drop the former entirely from the tree. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Kevin Hilman <khilman@linaro.org>
2014-12-19Merge branch 'x86-mpx-for-linus' of ↵Linus Torvalds2-5/+27
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 MPX fixes from Thomas Gleixner: "Three updates for the new MPX infrastructure: - Use the proper error check in the trap handler - Add a proper config option for it - Bring documentation up to date" * 'x86-mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, mpx: Give MPX a real config option prompt x86, mpx: Update documentation x86_64/traps: Fix always true condition
2014-12-19Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds2-6/+7
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fix from Ingo Molnar: "This contains a single TLS ABI validation fix from Andy Lutomirski" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/tls: Don't validate lm in set_thread_area() after all
2014-12-19Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds1-3/+19
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes and cleanups from Ingo Molnar: "A kernel fix plus mostly tooling fixes, but also some tooling restructuring and cleanups" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (39 commits) perf: Fix building warning on ARM 32 perf symbols: Fix use after free in filename__read_build_id perf evlist: Use roundup_pow_of_two tools: Adopt roundup_pow_of_two perf tools: Make the mmap length autotuning more robust tools: Adopt rounddown_pow_of_two and deps tools: Adopt fls_long and deps tools: Move bitops.h from tools/perf/util to tools/ tools: Introduce asm-generic/bitops.h tools lib: Move asm-generic/bitops/find.h code to tools/include and tools/lib tools: Whitespace prep patches for moving bitops.h tools: Move code originally from asm-generic/atomic.h into tools/include/asm-generic/ tools: Move code originally from linux/log2.h to tools/include/linux/ tools: Move __ffs implementation to tools/include/asm-generic/bitops/__ffs.h perf evlist: Do not use hard coded value for a mmap_pages default perf trace: Let the perf_evlist__mmap autosize the number of pages to use perf evlist: Improve the strerror_mmap method perf evlist: Clarify sterror_mmap variable names perf evlist: Fixup brown paper bag on "hint" for --mmap-pages cmdline arg perf trace: Provide a better explanation when mmap fails ...
2014-12-19Merge tag 'powerpc-3.19-2' of ↵Linus Torvalds20-78/+766
git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux Pull second batch of powerpc updates from Michael Ellerman: "The highlight is the series that reworks the idle management on powernv, which allows us to use deeper idle states on those machines. There's the fix from Anton for the "BUG at kernel/smpboot.c:134!" problem. An i2c driver for powernv. This is acked by Wolfram Sang, and he asked that we take it through the powerpc tree. A fix for audit from rgb at Red Hat, acked by Paul Moore who is one of the audit maintainers. A patch from Ben to export the symbol map of our OPAL firmware as a sysfs file, so that tools can use it. Also some CXL fixes, a couple of powerpc perf fixes, a fix for smt-enabled, and the patch to add __force to get_user() so we can use bitwise types" * tag 'powerpc-3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: powerpc/powernv: Ignore smt-enabled on Power8 and later powerpc/uaccess: Allow get_user() with bitwise types powerpc/powernv: Expose OPAL firmware symbol map powernv/powerpc: Add winkle support for offline cpus powernv/cpuidle: Redesign idle states management powerpc/powernv: Enable Offline CPUs to enter deep idle states powerpc/powernv: Switch off MMU before entering nap/sleep/rvwinkle mode i2c: Driver to expose PowerNV platform i2c busses powerpc: add little endian flag to syscall_get_arch() power/perf/hv-24x7: Use kmem_cache_free() instead of kfree powerpc/perf/hv-24x7: Use per-cpu page buffer cxl: Unmap MMIO regions when detaching a context cxl: Add timeout to process element commands cxl: Change contexts_lock to a mutex to fix sleep while atomic bug powerpc: Secondary CPUs must set cpu_callin_map after setting active and online
2014-12-18Merge tag 'pm+acpi-3.19-rc1-2' of ↵Linus Torvalds9-10/+10
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more ACPI and power management updates from Rafael Wysocki: "These are regression fixes (leds-gpio, ACPI backlight driver, operating performance points library, ACPI device enumeration messages, cpupower tool), other bug fixes (ACPI EC driver, ACPI device PM), some cleanups in the operating performance points (OPP) framework, continuation of CONFIG_PM_RUNTIME elimination, a couple of minor intel_pstate driver changes, a new MAINTAINERS entry for it and an ACPI fan driver change needed for better support of thermal management in user space. Specifics: - Fix a regression in leds-gpio introduced by a recent commit that inadvertently changed the name of one of the properties used by the driver (Fabio Estevam). - Fix a regression in the ACPI backlight driver introduced by a recent fix that missed one special case that had to be taken into account (Aaron Lu). - Drop the level of some new kernel messages from the ACPI core introduced by a recent commit to KERN_DEBUG which they should have used from the start and drop some other unuseful KERN_ERR messages printed by ACPI (Rafael J Wysocki). - Revert an incorrect commit modifying the cpupower tool (Prarit Bhargava). - Fix two regressions introduced by recent commits in the OPP library and clean up some existing minor issues in that code (Viresh Kumar). - Continue to replace CONFIG_PM_RUNTIME with CONFIG_PM throughout the tree (or drop it where that can be done) in order to make it possible to eliminate CONFIG_PM_RUNTIME (Rafael J Wysocki, Ulf Hansson, Ludovic Desroches). There will be one more "CONFIG_PM_RUNTIME removal" batch after this one, because some new uses of it have been introduced during the current merge window, but that should be sufficient to finally get rid of it. - Make the ACPI EC driver more robust against race conditions related to GPE handler installation failures (Lv Zheng). - Prevent the ACPI device PM core code from attempting to disable GPEs that it has not enabled which confuses ACPICA and makes it report errors unnecessarily (Rafael J Wysocki). - Add a "force" command line switch to the intel_pstate driver to make it possible to override the blacklisting of some systems in that driver if needed (Ethan Zhao). - Improve intel_pstate code documentation and add a MAINTAINERS entry for it (Kristen Carlson Accardi). - Make the ACPI fan driver create cooling device interfaces witn names that reflect the IDs of the ACPI device objects they are associated with, except for "generic" ACPI fans (PNP ID "PNP0C0B"). That's necessary for user space thermal management tools to be able to connect the fans with the parts of the system they are supposed to be cooling properly. From Srinivas Pandruvada" * tag 'pm+acpi-3.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits) MAINTAINERS: add entry for intel_pstate ACPI / video: update the skip case for acpi_video_device_in_dod() power / PM: Eliminate CONFIG_PM_RUNTIME NFC / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM SCSI / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM ACPI / EC: Fix unexpected ec_remove_handlers() invocations Revert "tools: cpupower: fix return checks for sysfs_get_idlestate_count()" tracing / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM x86 / PM: Replace CONFIG_PM_RUNTIME in io_apic.c PM: Remove the SET_PM_RUNTIME_PM_OPS() macro mmc: atmel-mci: use SET_RUNTIME_PM_OPS() macro PM / Kconfig: Replace PM_RUNTIME with PM in dependencies ARM / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM sound / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM phy / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM video / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM tty / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM ACPI / PM: Do not disable wakeup GPEs that have not been enabled ACPI / utils: Drop error messages from acpi_evaluate_reference() ...
2014-12-18Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparcLinus Torvalds1-4/+7
Pull sparc fix from David Miller: "Sparc32 locking bug fix from Andreas Larsson" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc: sparc32: destroy_context() and switch_mm() needs to disable interrupts.
2014-12-18Merge tag 'arc-3.19-rc1' of ↵Linus Torvalds7-73/+22
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull arch/arc updates from Vineet Gupta: "Minor updates for ARC for 3.19" * tag 'arc-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: rename default defconfig ARC: [nsimosci] move peripherals to match model to FPGA ARC: document memory clobber in irq control macros ARC: R-M-W assist locks only needed for !LLSC ARC: add power management options
2014-12-18Merge tag 'nios2-fixes-v3.19' of git://git.rocketboards.org/linux-socfpga-nextLinus Torvalds3-2/+6
Pull arch/nios2 fixes from Ley Foon Tan: - add definition of ioremap_wc to io.h to fix build error from make allmodconfig - fix make defconfig - fix sparse error * tag 'nios2-fixes-v3.19' of git://git.rocketboards.org/linux-socfpga-next: nios2/uaccess: fix sparse errors nios2: enable "make defconfig" nios2: add definition of ioremap_wc to io.h
2014-12-18Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds100-15633/+5767
Pull KVM update from Paolo Bonzini: "3.19 changes for KVM: - spring cleaning: removed support for IA64, and for hardware- assisted virtualization on the PPC970 - ARM, PPC, s390 all had only small fixes For x86: - small performance improvements (though only on weird guests) - usual round of hardware-compliancy fixes from Nadav - APICv fixes - XSAVES support for hosts and guests. XSAVES hosts were broken because the (non-KVM) XSAVES patches inadvertently changed the KVM userspace ABI whenever XSAVES was enabled; hence, this part is going to stable. Guest support is just a matter of exposing the feature and CPUID leaves support" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (179 commits) KVM: move APIC types to arch/x86/ KVM: PPC: Book3S: Enable in-kernel XICS emulation by default KVM: PPC: Book3S HV: Improve H_CONFER implementation KVM: PPC: Book3S HV: Fix endianness of instruction obtained from HEIR register KVM: PPC: Book3S HV: Remove code for PPC970 processors KVM: PPC: Book3S HV: Tracepoints for KVM HV guest interactions KVM: PPC: Book3S HV: Simplify locking around stolen time calculations arch: powerpc: kvm: book3s_paired_singles.c: Remove unused function arch: powerpc: kvm: book3s_pr.c: Remove unused function arch: powerpc: kvm: book3s.c: Remove some unused functions arch: powerpc: kvm: book3s_32_mmu.c: Remove unused function KVM: PPC: Book3S HV: Check wait conditions before sleeping in kvmppc_vcore_blocked KVM: PPC: Book3S HV: ptes are big endian KVM: PPC: Book3S HV: Fix inaccuracies in ICP emulation for H_IPI KVM: PPC: Book3S HV: Fix KSM memory corruption KVM: PPC: Book3S HV: Fix an issue where guest is paused on receiving HMI KVM: PPC: Book3S HV: Fix computation of tlbie operand KVM: PPC: Book3S HV: Add missing HPTE unlock KVM: PPC: BookE: Improve irq inject tracepoint arm/arm64: KVM: Require in-kernel vgic for the arch timers ...
2014-12-18KVM: PPC: E500: Compile fix in this_cpu_writeAlexander Graf1-1/+1
Commit 69111bac42f5 ("powerpc: Replace __get_cpu_var uses") introduced compile breakage to the e500 target by introducing invalid automatically created C syntax. Fix up the breakage and make the code compile again. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-12-18sparc32: destroy_context() and switch_mm() needs to disable interrupts.Andreas Larsson1-4/+7
Load balancing can be triggered in the critical sections protected by srmmu_context_spinlock in destroy_context() and switch_mm() and can hang the cpu waiting for the rq lock of another cpu that in turn has called switch_mm hangning on srmmu_context_spinlock leading to deadlock. So, disable interrupt while taking srmmu_context_spinlock in destroy_context() and switch_mm() so we don't deadlock. See also commit 77b838fa1ef0 ("[SPARC64]: destroy_context() needs to disable interrupts.") Signed-off-by: Andreas Larsson <andreas@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-18x86/tls: Don't validate lm in set_thread_area() after allAndy Lutomirski2-6/+7
It turns out that there's a lurking ABI issue. GCC, when compiling this in a 32-bit program: struct user_desc desc = { .entry_number = idx, .base_addr = base, .limit = 0xfffff, .seg_32bit = 1, .contents = 0, /* Data, grow-up */ .read_exec_only = 0, .limit_in_pages = 1, .seg_not_present = 0, .useable = 0, }; will leave .lm uninitialized. This means that anything in the kernel that reads user_desc.lm for 32-bit tasks is unreliable. Revert the .lm check in set_thread_area(). The value never did anything in the first place. Fixes: 0e58af4e1d21 ("x86/tls: Disallow unusual TLS segments") Signed-off-by: Andy Lutomirski <luto@amacapital.net> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org # Only if 0e58af4e1d21 is backported Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/d7875b60e28c512f6a6fc0baf5714d58e7eaadbb.1418856405.git.luto@amacapital.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-12-18powerpc/powernv: Ignore smt-enabled on Power8 and laterGreg Kurz1-1/+15
Starting with POWER8, the subcore logic relies on all threads of a core being booted so that they can participate in split mode switches. So on those machines we ignore the smt_enabled_at_boot setting (smt-enabled on the kernel command line). Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> [mpe: Update comment and change log to be more precise] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-12-18s390/kvm: REPLACE barrier fixup with READ_ONCEChristian Borntraeger1-12/+6
ACCESS_ONCE does not work reliably on non-scalar types. For example gcc 4.6 and 4.7 might remove the volatile tag for such accesses during the SRA (scalar replacement of aggregates) step (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145) Commit 1365039d0cb3 ("KVM: s390: Fix ipte locking") replace ACCESS_ONCE with barriers. Lets use READ_ONCE instead. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2014-12-18arm/spinlock: Replace ACCESS_ONCE with READ_ONCEChristian Borntraeger1-2/+2
ACCESS_ONCE does not work reliably on non-scalar types. For example gcc 4.6 and 4.7 might remove the volatile tag for such accesses during the SRA (scalar replacement of aggregates) step (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145) Change the spinlock code to replace ACCESS_ONCE with READ_ONCE. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2014-12-18arm64/spinlock: Replace ACCESS_ONCE READ_ONCEChristian Borntraeger1-2/+2
ACCESS_ONCE does not work reliably on non-scalar types. For example gcc 4.6 and 4.7 might remove the volatile tag for such accesses during the SRA (scalar replacement of aggregates) step (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145) Change the spinlock code to replace ACCESS_ONCE with READ_ONCE. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2014-12-18mips/gup: Replace ACCESS_ONCE with READ_ONCEChristian Borntraeger1-1/+1
ACCESS_ONCE does not work reliably on non-scalar types. For example gcc 4.6 and 4.7 might remove the volatile tag for such accesses during the SRA (scalar replacement of aggregates) step https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145) Change the gup code to replace ACCESS_ONCE with READ_ONCE. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2014-12-18x86/gup: Replace ACCESS_ONCE with READ_ONCEChristian Borntraeger1-1/+1
ACCESS_ONCE does not work reliably on non-scalar types. For example gcc 4.6 and 4.7 might remove the volatile tag for such accesses during the SRA (scalar replacement of aggregates) step (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145) Change the gup code to replace ACCESS_ONCE with READ_ONCE. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2014-12-18x86/spinlock: Replace ACCESS_ONCE with READ_ONCEChristian Borntraeger1-4/+4
ACCESS_ONCE does not work reliably on non-scalar types. For example gcc 4.6 and 4.7 might remove the volatile tag for such accesses during the SRA (scalar replacement of aggregates) step (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145) Change the spinlock code to replace ACCESS_ONCE with READ_ONCE. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2014-12-18Merge tag 'signed-kvm-ppc-next' of git://github.com/agraf/linux-2.6 into HEADPaolo Bonzini26-1093/+870
Patch queue for ppc - 2014-12-18 Highights this time around: - Removal of HV support for 970. It became a maintenance burden and received practically no testing. POWER8 with HV is available now, so just grab one of those boxes if PR isn't enough for you. - Some bug fixes and performance improvements - Tracepoints for book3s_hv
2014-12-18KVM: move APIC types to arch/x86/Paolo Bonzini2-0/+27
They are not used anymore by IA64, move them away. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-18powerpc/uaccess: Allow get_user() with bitwise typesMichael S. Tsirkin1-3/+3
At the moment, if p and x are both of the same bitwise type (eg. __le32), get_user(x, p) produces a sparse warning. This is because *p is loaded into a long then cast back to typeof(*p). When typeof(*p) is a bitwise type (which is uncommon), such a cast needs __force, otherwise sparse produces a warning. For non-bitwise types __force should have no effect, and should not hide any legitimate errors. Note that we are casting to typeof(*p) not typeof(x). Even with the cast, if x and *p are of different types we should get the warning, so I think we are not loosing the ability to detect any actual errors. virtio would like to use bitwise types with get_user() so fix these spurious warnings by adding __force. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> [mpe: Fill in changelog with more details] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-12-17KVM: PPC: Book3S: Enable in-kernel XICS emulation by defaultAnton Blanchard1-0/+1
The in-kernel XICS emulation is faster than doing it all in QEMU and it has got a lot of testing, so enable it by default. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-12-17Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull user namespace related fixes from Eric Biederman: "As these are bug fixes almost all of thes changes are marked for backporting to stable. The first change (implicitly adding MNT_NODEV on remount) addresses a regression that was created when security issues with unprivileged remount were closed. I go on to update the remount test to make it easy to detect if this issue reoccurs. Then there are a handful of mount and umount related fixes. Then half of the changes deal with the a recently discovered design bug in the permission checks of gid_map. Unix since the beginning has allowed setting group permissions on files to less than the user and other permissions (aka ---rwx---rwx). As the unix permission checks stop as soon as a group matches, and setgroups allows setting groups that can not later be dropped, results in a situtation where it is possible to legitimately use a group to assign fewer privileges to a process. Which means dropping a group can increase a processes privileges. The fix I have adopted is that gid_map is now no longer writable without privilege unless the new file /proc/self/setgroups has been set to permanently disable setgroups. The bulk of user namespace using applications even the applications using applications using user namespaces without privilege remain unaffected by this change. Unfortunately this ix breaks a couple user space applications, that were relying on the problematic behavior (one of which was tools/selftests/mount/unprivileged-remount-test.c). To hopefully prevent needing a regression fix on top of my security fix I rounded folks who work with the container implementations mostly like to be affected and encouraged them to test the changes. > So far nothing broke on my libvirt-lxc test bed. :-) > Tested with openSUSE 13.2 and libvirt 1.2.9. > Tested-by: Richard Weinberger <richard@nod.at> > Tested on Fedora20 with libvirt 1.2.11, works fine. > Tested-by: Chen Hanxiao <chenhanxiao@cn.fujitsu.com> > Ok, thanks - yes, unprivileged lxc is working fine with your kernels. > Just to be sure I was testing the right thing I also tested using > my unprivileged nsexec testcases, and they failed on setgroup/setgid > as now expected, and succeeded there without your patches. > Tested-by: Serge Hallyn <serge.hallyn@ubuntu.com> > I tested this with Sandstorm. It breaks as is and it works if I add > the setgroups thing. > Tested-by: Andy Lutomirski <luto@amacapital.net> # breaks things as designed :(" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: userns: Unbreak the unprivileged remount tests userns; Correct the comment in map_write userns: Allow setting gid_maps without privilege when setgroups is disabled userns: Add a knob to disable setgroups on a per user namespace basis userns: Rename id_map_mutex to userns_state_mutex userns: Only allow the creator of the userns unprivileged mappings userns: Check euid no fsuid when establishing an unprivileged uid mapping userns: Don't allow unprivileged creation of gid mappings userns: Don't allow setgroups until a gid mapping has been setablished userns: Document what the invariant required for safe unprivileged mappings. groups: Consolidate the setgroups permission checks mnt: Clear mnt_expire during pivot_root mnt: Carefully set CL_UNPRIVILEGED in clone_mnt mnt: Move the clear of MNT_LOCKED from copy_tree to it's callers. umount: Do not allow unmounting rootfs. umount: Disallow unprivileged mount force mnt: Update unprivileged remount test mnt: Implicitly add MNT_NODEV on remount when it was implicitly added by mount
2014-12-17x86: mm: fix VM_FAULT_RETRY handlingLinus Torvalds1-1/+1
My commit 26178ec11ef3 ("x86: mm: consolidate VM_FAULT_RETRY handling") had a really stupid typo: the FAULT_FLAG_USER bit is in the 'flags' variable, not the 'fault' variable. Duh, The one silver lining in this is that Dave finding this at least confirms that trinity actually triggers this special path easily, in a way normal use does not. Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-12-17Merge branch 'next' of ↵Linus Torvalds2-0/+91
git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux Pull thermal management update from Zhang Rui: "Summary: - of-thermal extension to allow drivers to register and use its functionality in a better way, without exploiting thermal core. From Lukasz Majewski. - Fix a bug in intel_soc_dts_thermal driver which calls a sleep function in interrupt handler. From Maurice Petallo. - add a thermal UAPI header file for exporting the thermal generic netlink information to user-space. From Florian Fainelli. - First round of refactoring in Exynos driver. Bartlomiej and Lukasz are attempting to make it lean and easier to understand. - New thermal driver for Rockchip (rk3288), with support for DT thermal. From Caesar Wang. - New thermal driver for Nvidia, Tegra124 SOCTHERM driver, with support for DT thermal. From Mikko Perttunen. - New cooling device, based on common clock framework. From Eduardo Valentin. - a couple of small fixes in thermal core framework. From Srinivas Pandruvada, Javi Merino, Luis Henriques. - Dropping Armada A375-Z1 SoC thermal support as the chip is not in the market, armada folks decided to drop its support. - a couple of small fixes and cleanups in int340x thermal driver" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (58 commits) thermal: provide an UAPI header file Thermal/int340x: Clear the error value of the last acpi_bus_get_device() call thermal/powerclamp: add id for braswell cpu thermal: Intel SoC DTS: Don't do thermal zone update inside spin_lock Thermal: fix platform_no_drv_owner.cocci warnings Thermal/int340x: avoid unnecessary pointer casting thermal: int3403: Delete a check before thermal_zone_device_unregister() thermal/int3400: export uuids thermal: of: Extend current of-thermal.c code to allow setting emulated temp thermal: of: Extend of-thermal to export table of trip points thermal: of: Rename struct __thermal_trip to struct thermal_trip thermal: of: Extend of-thermal.c to provide check if trip point is valid thermal: of: Extend of-thermal.c to provide number of trip points thermal: Fix error path in thermal_init() thermal: lock the thermal zone when switching governors thermal: core: ignore invalid trip temperature thermal: armada: Remove support for A375-Z1 SoC thermal: rockchip: add driver for thermal dt-bindings: document Rockchip thermal thermal: exynos: remove exynos_tmu_data.h include ...
2014-12-17Merge tag 'microblaze-3.19-rc1' of git://git.monstr.eu/linux-2.6-microblazeLinus Torvalds3-5/+48
Pull Microblaze fix from Michal Simek: "Fix mmap for cache coherent memory" * tag 'microblaze-3.19-rc1' of git://git.monstr.eu/linux-2.6-microblaze: microblaze: Fix mmap for cache coherent memory
2014-12-17KVM: PPC: Book3S HV: Improve H_CONFER implementationSam Bobroff4-2/+74
Currently the H_CONFER hcall is implemented in kernel virtual mode, meaning that whenever a guest thread does an H_CONFER, all the threads in that virtual core have to exit the guest. This is bad for performance because it interrupts the other threads even if they are doing useful work. The H_CONFER hcall is called by a guest VCPU when it is spinning on a spinlock and it detects that the spinlock is held by a guest VCPU that is currently not running on a physical CPU. The idea is to give this VCPU's time slice to the holder VCPU so that it can make progress towards releasing the lock. To avoid having the other threads exit the guest unnecessarily, we add a real-mode implementation of H_CONFER that checks whether the other threads are doing anything. If all the other threads are idle (i.e. in H_CEDE) or trying to confer (i.e. in H_CONFER), it returns H_TOO_HARD which causes a guest exit and allows the H_CONFER to be handled in virtual mode. Otherwise it spins for a short time (up to 10 microseconds) to give other threads the chance to observe that this thread is trying to confer. The spin loop also terminates when any thread exits the guest or when all other threads are idle or trying to confer. If the timeout is reached, the H_CONFER returns H_SUCCESS. In this case the guest VCPU will recheck the spinlock word and most likely call H_CONFER again. This also improves the implementation of the H_CONFER virtual mode handler. If the VCPU is part of a virtual core (vcore) which is runnable, there will be a 'runner' VCPU which has taken responsibility for running the vcore. In this case we yield to the runner VCPU rather than the target VCPU. We also introduce a check on the target VCPU's yield count: if it differs from the yield count passed to H_CONFER, the target VCPU has run since H_CONFER was called and may have already released the lock. This check is required by PAPR. Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>