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2015-03-25s390: make couple of functions and variables staticHeiko Carstens2-2/+2
As reported by sparse these can and should be static. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-25s390/maccess: improve s390_kernel_write()Heiko Carstens1-25/+20
Use the sturg instruction instead of the stura instruction. This allows to modify up to eight bytes in a row instead of only four. For function tracer enabling and disabling this reduces the time needed to modify the text sections by 50%, since for each mcount call site six bytes need to be changed. Also remove the EXTABLE entries, since calls to this function are not supposed to fail. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-25s390/maccess: remove potentially broken probe_kernel_write()Heiko Carstens5-18/+28
Remove the s390 architecture implementation of probe_kernel_write() and instead use a new function s390_kernel_write() to modify kernel text and data everywhere. The s390 implementation of probe_kernel_write() was potentially broken since it modified memory in a read-modify-write fashion, which read four bytes, modified the requested bytes within those four bytes and wrote the result back. If two cpus would modify the same four byte area at different locations within that area, this could lead to corruption. Right now the only places which called probe_kernel_write() did run within stop_machine_run. Therefore the scenario can't happen right now, however that might change at any time. To fix this rename probe_kernel_write() to s390_kernel_write() which can have special semantics, like only call it while running within stop_machine(). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-25s390/traps: panic() instead of die() on translation exceptionHeiko Carstens1-1/+1
In case of a translation exception the page tables are corrupted. If the exception handler then calls die() which again calls show_regs() -> show_code() -> copy_from_user(), the kernel may access the same memory location again and generates yet another translation exception. Which in turn will lead to a deadlock on the die_lock spinlock, which the kernel tries to grab recursively. Given that the page tables are corrupted anyway, if we see such an exception, let's simply panic. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-25s390: remove test_facility(2) (== z/Architecture mode active) checksHeiko Carstens2-8/+3
Given that the kernel now always runs in 64 bit mode, it is pointless to check if the z/Architecture mode is active. Remove the checks. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-25s390/cmpxchg: simplify cmpxchg_doubleHeiko Carstens1-6/+1
Since sizeof(long) == 4 is always false now, simplify cmpxchg_double a bit. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-25s390: remove 31 bit syscallsHeiko Carstens2-361/+361
Remove the 31 bit syscalls from the syscall table. This is a separate patch just in case I screwed something up so it can be easily reverted. However the conversion was done with a script, so everything should be ok. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-25s390: remove "64" suffix from a couple of filesHeiko Carstens6-7/+7
Rename a couple of files to get rid of the "64" suffix. "git blame" will still work. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-25s390: remove 31 bit supportHeiko Carstens85-5883/+169
Remove the 31 bit support in order to reduce maintenance cost and effectively remove dead code. Since a couple of years there is no distribution left that comes with a 31 bit kernel. The 31 bit kernel also has been broken since more than a year before anybody noticed. In addition I added a removal warning to the kernel shown at ipl for 5 minutes: a960062e5826 ("s390: add 31 bit warning message") which let everybody know about the plan to remove 31 bit code. We didn't get any response. Given that the last 31 bit only machine was introduced in 1999 let's remove the code. Anybody with 31 bit user space code can still use the compat mode. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-25s390/smp: reenable smt after resumeHeiko Carstens1-0/+11
After a suspend/resume cycle we missed to enable smt again, which leads to all sorts of bugs, since the kernel assumes smt is enabled, while the hardware thinks it is not. Reported-and-tested-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reported-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-13s390/mm: limit STACK_RND_MASK for compat tasksMartin Schwidefsky1-1/+1
For compat tasks the mmap randomization does not use the maximum randomization value from mmap_rnd_mask but the fixed value of 0x7ff. This needs to be respected in the definition of STACK_RND_MASK as well. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-13s390/ftrace: fix compile error if CONFIG_KPROBES is disabledHeiko Carstens1-16/+45
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-13s390/cpum_sf: add diagnostic sampling event only if it is authorizedHendrik Brueckner1-2/+5
The SF_CYCLES_BASIC_DIAG is always registered even if it is turned of in the current hardware configuration. Because diagnostic-sampling is typically not turned on in the hardware configuration, do not register this perf event by default. Enable it only if the diagnostic-sampling function is authorized. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-12arch/c6x/include/asm/pgtable.h: define dummy pgprot_writecombine for !MMUChen Gang1-0/+5
When !MMU, asm-generic will not define default pgprot_writecombine, so c6x needs to define it by itself. The related error: CC [M] fs/pstore/ram_core.o fs/pstore/ram_core.c: In function 'persistent_ram_vmap': fs/pstore/ram_core.c:399:10: error: implicit declaration of function 'pgprot_writecombine' [-Werror=implicit-function-declaration] prot = pgprot_writecombine(PAGE_KERNEL); ^ fs/pstore/ram_core.c:399:8: error: incompatible types when assigning to type 'pgprot_t {aka struct <anonymous>}' from type 'int' prot = pgprot_writecombine(PAGE_KERNEL); ^ Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-03-12Merge tag 'microblaze-4.0-rc4' of git://git.monstr.eu/linux-2.6-microblazeLinus Torvalds1-3/+4
Pull arch/microblaze fixes from Michal Simek: "Fix syscall error recovery. Two patches - one is just preparation patch for the second which is fixing the problem with syscalls" * tag 'microblaze-4.0-rc4' of git://git.monstr.eu/linux-2.6-microblaze: microblaze: Fix syscall error recovery for invalid syscall IDs microblaze: Coding style cleanup
2015-03-12Merge tag 'nios2-fix-4.0-rc4' of git://git.rocketboards.org/linux-socfpga-nextLinus Torvalds7-89/+62
Pull arch/nios2 fix from Ley Foon Tan: "Remove pt_regs from user header and use generic ucontext.h" * tag 'nios2-fix-4.0-rc4' of git://git.rocketboards.org/linux-socfpga-next: nios2: update pt_regs
2015-03-12nios2: update pt_regsChung-Ling Tang7-89/+62
Remove struct pt_regs from user header and use generic ucontext.h. Signed-off-by: Chung-Ling Tang <cltang@codesourcery.com> Acked-by: Ley Foon Tan <lftan@altera.com>
2015-03-09Merge git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds4-45/+40
Pull kvm/s390 bugfixes from Marcelo Tosatti. * git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: s390: non-LPAR case obsolete during facilities mask init KVM: s390: include guest facilities in kvm facility test KVM: s390: fix in memory copy of facility lists KVM: s390/cpacf: Fix kernel bug under z/VM KVM: s390/cpacf: Enable key wrapping by default
2015-03-09Merge branch 'for-linus' of ↵Linus Torvalds7-37/+36
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 fixes from Martin Schwidefsky: "One performance optimization for page_clear and a couple of bug fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/mm: fix incorrect ASCE after crst_table_downgrade s390/ftrace: fix crashes when switching tracers / add notrace to cpu_relax() s390/pci: unify pci_iomap symbol exports s390/pci: fix [un]map_resources sequence s390: let the compiler do page clearing s390/pci: fix possible information leak in mmio syscall s390/dcss: array index 'i' is used before limits check. s390/scm_block: fix off by one during cluster reservation s390/jump label: improve and fix sanity check s390/jump label: add missing jump_label_apply_nops() call
2015-03-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds5-6/+7
Pull networking fixes from David Miller: 1) nft_compat accidently truncates ethernet protocol to 8-bits, from Arturo Borrero. 2) Memory leak in ip_vs_proc_conn(), from Julian Anastasov. 3) Don't allow the space required for nftables rules to exceed the maximum value representable in the dlen field. From Patrick McHardy. 4) bcm63xx_enet can accidently leave interrupts permanently disabled due to errors in the NAPI polling exit logic. Fix from Nicolas Schichan. 5) Fix OOPSes triggerable by the ping protocol module, due to missing address family validations etc. From Lorenzo Colitti. 6) Don't use RCU locking in sleepable context in team driver, from Jiri Pirko. 7) xen-netback miscalculates statistic offset pointers when reporting the stats to userspace. From David Vrabel. 8) Fix a leak of up to 256 pages per VIF destroy in xen-netaback, also from David Vrabel. 9) ip_check_defrag() cannot assume that skb_network_offset(), particularly when it is used by the AF_PACKET fanout defrag code. From Alexander Drozdov. 10) gianfar driver doesn't query OF node names properly when trying to determine the number of hw queues available. Fix it to explicitly check for OF nodes named queue-group. From Tobias Waldekranz. 11) MID field in macb driver should be 12 bits, not 16. From Punnaiah Choudary Kalluri. 12) Fix unintentional regression in traceroute due to timestamp socket option changes. Empty ICMP payloads should be allowed in non-timestamp cases. From Willem de Bruijn. 13) When devices are unregistered, we have to get rid of AF_PACKET multicast list entries that point to it via ifindex. Fix from Francesco Ruggeri. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (38 commits) tipc: fix bug in link failover handling net: delete stale packet_mclist entries net: macb: constify macb configuration data MAINTAINERS: add Marc Kleine-Budde as co maintainer for CAN networking layer MAINTAINERS: linux-can moved to github can: kvaser_usb: Read all messages in a bulk-in URB buffer can: kvaser_usb: Avoid double free on URB submission failures can: peak_usb: fix missing ctrlmode_ init for every dev can: add missing initialisations in CAN related skbuffs ip: fix error queue empty skb handling bgmac: Clean warning messages tcp: align tcp_xmit_size_goal() on tcp_tso_autosize() net: fec: fix unbalanced clk disable on driver unbind net: macb: Correct the MID field length value net: gianfar: correctly determine the number of queue groups ipv4: ip_check_defrag should not assume that skb_network_offset is zero net: bcmgenet: properly disable password matching net: eth: xgene: fix booting with devicetree bnx2x: Force fundamental reset for EEH recovery xen-netback: refactor xenvif_handle_frag_list() ...
2015-03-07Merge tag 'arm64-fixes' of ↵Linus Torvalds1-1/+4
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Catalin Marinas: "arm64 and generic kernel/module.c (acked by Rusty) fixes for CONFIG_DEBUG_SET_MODULE_RONX" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: kernel/module.c: Update debug alignment after symtable generation arm64: Don't use is_module_addr in setting page attributes
2015-03-06Merge tag 'pm+acpi-4.0-rc3' of ↵Linus Torvalds1-3/+8
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management and ACPI fixes from Rafael Wysocki: "These are fixes for recent regressions (ACPI resources management, suspend-to-idle), stable-candidate fixes (ACPI backlight), fixes related to the wakeup IRQ management changes made in v3.18, other fixes (suspend-to-idle, cpufreq ppc driver) and a couple of cleanups (suspend-to-idle, generic power domains, ACPI backlight). Specifics: - Fix ACPI resources management problems introduced by the recent rework of the code in question (Jiang Liu) and a build issue introduced by those changes (Joachim Nilsson). - Fix a recent suspend-to-idle regression on systems where entering idle states causes local timers to stop, prevent suspend-to-idle from crashing in restricted configurations (no cpuidle driver, cpuidle disabled etc.) and clean up the idle loop somewhat while at it (Rafael J Wysocki). - Fix build problem in the cpufreq ppc driver (Geert Uytterhoeven). - Allow the ACPI backlight driver module to be loaded if ACPI is disabled which helps the i915 driver in those configurations (stable-candidate) and change the code to help debug unusual use cases (Chris Wilson). - Wakeup IRQ management changes in v3.18 caused some drivers on the at91 platform to trigger a warning from the IRQ core related to an unexpected combination of interrupt action handler flags. However, on at91 a timer IRQ is shared with some other devices (including system wakeup ones) and that leads to the unusual combination of flags in question. To make it possible to avoid the warning introduce a new interrupt action handler flag (which can be used by drivers to indicate the special case to the core) and rework the problematic at91 drivers to use it and work as expected during system suspend/resume. From Boris Brezillon, Rafael J Wysocki and Mark Rutland. - Clean up the generic power domains subsystem's debugfs interface (Kevin Hilman)" * tag 'pm+acpi-4.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: genirq / PM: describe IRQF_COND_SUSPEND tty: serial: atmel: rework interrupt and wakeup handling watchdog: at91sam9: request the irq with IRQF_NO_SUSPEND cpuidle / sleep: Use broadcast timer for states that stop local timer clk: at91: implement suspend/resume for the PMC irqchip rtc: at91rm9200: rework wakeup and interrupt handling rtc: at91sam9: rework wakeup and interrupt handling PM / wakeup: export pm_system_wakeup symbol genirq / PM: Add flag for shared NO_SUSPEND interrupt lines ACPI / video: Propagate the error code for acpi_video_register ACPI / video: Load the module even if ACPI is disabled PM / Domains: cleanup: rename gpd -> genpd in debugfs interface cpufreq: ppc: Add missing #include <asm/smp.h> x86/PCI/ACPI: Relax ACPI resource descriptor checks to work around BIOS bugs x86/PCI/ACPI: Ignore resources consumed by host bridge itself cpuidle: Clean up fallback handling in cpuidle_idle_call() cpuidle / sleep: Do sanity checks in cpuidle_enter_freeze() too idle / sleep: Avoid excessive disabling and enabling interrupts PCI: versatile: Update for list_for_each_entry() API change genirq / PM: better describe IRQF_NO_SUSPEND semantics
2015-03-06arm64: Don't use is_module_addr in setting page attributesLaura Abbott1-1/+4
The set_memory_* functions currently only support module addresses. The addresses are validated using is_module_addr. That function is special though and relies on internal state in the module subsystem to work properly. At the time of module initialization and calling set_memory_*, it's too early for is_module_addr to work properly so it always returns false. Rather than be subject to the whims of the module state, just bounds check against the module virtual address range. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-03-05Merge branch 'acpi-resources'Rafael J. Wysocki1-3/+8
* acpi-resources: x86/PCI/ACPI: Relax ACPI resource descriptor checks to work around BIOS bugs x86/PCI/ACPI: Ignore resources consumed by host bridge itself PCI: versatile: Update for list_for_each_entry() API change
2015-03-05Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds3-22/+20
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Ingo Molnar: "Misc fixes: EFI fixes, an Intel Quark fix, an asm fix and an FPU handling fix" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/fpu/xsaves: Fix improper uses of __ex_table x86/intel/quark: Select COMMON_CLK x86/asm/entry/64: Remove a bogus 'ret_from_fork' optimization firmware: dmi_scan: Fix dmi_len type efi/libstub: Fix boundary checking in efi_high_alloc() firmware: dmi_scan: Fix dmi scan to handle "End of Table" structure
2015-03-05Merge tag 'kvm-s390-master-20150303' of ↵Marcelo Tosatti4-45/+40
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux KVM: s390: Fixups for changes in merge window for 4.0 Here are some fixups/improvements for commit 658b6eda204 ("KVM: s390: add cpu model support") commit 9d8d578605b ("KVM: s390: use facilities and cpu_id per KVM") commit a374e892c34 ("KVM: s390/cpacf: Enable/disable protected key functions for kvm guest") commit 45c9b47c588 ("KVM: s390/CPACF: Choose crypto control block format") which all have been merged during the merge window for 4.0.
2015-03-05x86/fpu/xsaves: Fix improper uses of __ex_tableQuentin Casasnovas1-17/+11
Commit: f31a9f7c7169 ("x86/xsaves: Use xsaves/xrstors to save and restore xsave area") introduced alternative instructions for XSAVES/XRSTORS and commit: adb9d526e982 ("x86/xsaves: Add xsaves and xrstors support for booting time") added support for the XSAVES/XRSTORS instructions at boot time. Unfortunately both failed to properly protect them against faulting: The 'xstate_fault' macro will use the closest label named '1' backward and that ends up in the .altinstr_replacement section rather than in .text. This means that the kernel will never find in the __ex_table the .text address where this instruction might fault, leading to serious problems if userspace manages to trigger the fault. Signed-off-by: Quentin Casasnovas <quentin.casasnovas@oracle.com> Signed-off-by: Jamie Iles <jamie.iles@oracle.com> [ Improved the changelog, fixed some whitespace noise. ] Acked-by: Borislav Petkov <bp@alien8.de> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: <stable@vger.kernel.org> Cc: Allan Xavier <mr.a.xavier@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: adb9d526e982 ("x86/xsaves: Add xsaves and xrstors support for booting time") Fixes: f31a9f7c7169 ("x86/xsaves: Use xsaves/xrstors to save and restore xsave area") Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-05x86/intel/quark: Select COMMON_CLKAndy Shevchenko1-0/+1
The commit 8bbc2a135b63 ("x86/intel/quark: Add Intel Quark platform support") introduced a minimal support of Intel Quark SoC. That allows to use core parts of the SoC. However, the SPI, I2C, and GPIO drivers can't be selected by kernel configuration because they depend on COMMON_CLK. The patch adds a COMMON_CLK selection to the platfrom definition to allow user choose the drivers. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Ong, Boon Leong <boon.leong.ong@intel.com> Cc: Bryan O'Donoghue <pure.logic@nexus-software.ie> Cc: Darren Hart <dvhart@linux.intel.com> Fixes: 8bbc2a135b63 ("x86/intel/quark: Add Intel Quark platform support") Link: http://lkml.kernel.org/r/1425569044-2867-1-git-send-email-andriy.shevchenko@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-04ARM: fix typos in smc91x platform dataArnd Bergmann4-4/+5
I recently did a rework of the smc91x driver and did some build-testing by compiling hundreds of randconfig kernels. Unfortunately, my script was wrong and did not actually test the configurations that mattered, so I introduced stupid typos in almost every file I touched. I fixed my script now, built all configurations that actually matter and fixed all the typos, this is the result. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: b70661c70830d ("net: smc91x: use run-time configuration on all ARM machines") Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-05x86/asm/entry/64: Remove a bogus 'ret_from_fork' optimizationAndy Lutomirski1-5/+8
'ret_from_fork' checks TIF_IA32 to determine whether 'pt_regs' and the related state make sense for 'ret_from_sys_call'. This is entirely the wrong check. TS_COMPAT would make a little more sense, but there's really no point in keeping this optimization at all. This fixes a return to the wrong user CS if we came from int 0x80 in a 64-bit task. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/4710be56d76ef994ddf59087aad98c000fbab9a4.1424989793.git.luto@amacapital.net [ Backported from tip:x86/asm. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-04dtb: change binding name to match with newer firmware DTIyappan Subramanian1-2/+2
This patch fixes the backward compatibility of the older driver with the newer firmware by making the binding unique so that the older driver won't recognize the non-supported interfaces. The new bindings are in sync with the newer firmware. Signed-off-by: Iyappan Subramanian <isubramanian@apm.com> Signed-off-by: Keyur Chudgar <kchudgar@apm.com> Tested-by: Mark Langsdorf <mlangsdo@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-04Merge git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds9-26/+31
Pull KVM fixes from Marcelo Tosatti: "KVM bug fixes, including a SVM interrupt injection regression fix, MIPS and ARM bug fixes" * git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: MIPS: Enable after disabling interrupt KVM: MIPS: Fix trace event to save PC directly KVM: SVM: fix interrupt injection (apic->isr_count always 0) KVM: emulate: fix CMPXCHG8B on 32-bit hosts KVM: VMX: fix build without CONFIG_SMP arm/arm64: KVM: Add exit reaons to kvm_exit event tracing ARM: KVM: Fix size check in __coherent_cache_guest_page
2015-03-04Merge tag 'arc-4.0-fixes-1' of ↵Linus Torvalds6-36/+73
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC fixes from Vineet Gupta: - Fix for /proc/<pid>/maps "stack" vma annotation - sched stats not printing correct sleeping task PC - perf not reporting page faults * tag 'arc-4.0-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: Fix thread_saved_pc() ARC: Fix KSTK_ESP() ARC: perf: Enable generic software events ARC: Make arc_unwind_core accessible externally
2015-03-04Merge tag 'powerpc-4.0-2' of ↵Linus Torvalds6-28/+45
git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux Pull powerpc fixes from Michael Ellerman: - Fix for dynticks. - Fix for smpboot bug. - Fix for IOMMU group refcounting. * tag 'powerpc-4.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: powerpc/iommu: Remove IOMMU device references via bus notifier powerpc/smp: Wait until secondaries are active & online powerpc: Re-enable dynticks
2015-03-04microblaze: Fix syscall error recovery for invalid syscall IDsJamie Garside1-1/+2
This patch fixes two bugs in the Microblaze syscall trap handler when an invalid syscall ID is used. First, the range check on line 351 only checks for syscall IDs greater than __NR_syscalls. A negative syscall ID (either passed to `syscall()` or as returned by `do_syscall_trace_enter()` on error) will still satisfy this test and cause the Linux kernel to access an invalid memory location and cause a kernel oops. This has been fixed by also checking for r12 < 0. Secondly, the current error recovery at line 378 returns using the wrong register (r15 instead of r14) and does not restore the previous stack state. This has been fixed by invoking `ret_from_trap` on error, setting r3 to `-ENOSYS`, similar to what would happen when calling a valid syscall. Signed-off-by: Jamie Garside <jamie.garside@york.ac.uk> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2015-03-04microblaze: Coding style cleanupMichal Simek1-2/+2
No function change. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2015-03-04x86/PCI/ACPI: Ignore resources consumed by host bridge itselfJiang Liu1-3/+8
When parsing resources for PCI host bridge, we should ignore resources consumed by host bridge itself and only report window resources available to child PCI busses. Fixes: 593669c2ac0f (x86/PCI/ACPI: Use common ACPI resource interfaces ...) Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-03-04KVM: s390: non-LPAR case obsolete during facilities mask initMichael Mueller1-16/+1
With patch "include guest facilities in kvm facility test" it is no longer necessary to have special handling for the non-LPAR case. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-03-04KVM: s390: include guest facilities in kvm facility testMichael Mueller4-22/+25
Most facility related decisions in KVM have to take into account: - the facilities offered by the underlying run container (LPAR/VM) - the facilities supported by the KVM code itself - the facilities requested by a guest VM This patch adds the KVM driver requested facilities to the test routine. It additionally renames struct s390_model_fac to kvm_s390_fac and its field names to be more meaningful. The semantics of the facilities stored in the KVM architecture structure is changed. The address arch.model.fac->list now points to the guest facility list and arch.model.fac->mask points to the KVM facility mask. This patch fixes the behaviour of KVM for some facilities for guests that ignore the guest visible facility bits, e.g. guests could use transactional memory intructions on hosts supporting them even if the chosen cpu model would not offer them. The userspace interface is not affected by this change. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-03-04KVM: s390: fix in memory copy of facility listsMichael Mueller1-2/+2
The facility lists were not fully copied. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-03-04KVM: s390/cpacf: Fix kernel bug under z/VMChristian Borntraeger1-3/+6
Under z/VM PQAP might trigger an operation exception if no crypto cards are defined via APVIRTUAL or APDEDICATED. [ 386.098666] Kernel BUG at 0000000000135c56 [verbose debug info unavailable] [ 386.098693] illegal operation: 0001 ilc:2 [#1] SMP [...] [ 386.098751] Krnl PSW : 0704c00180000000 0000000000135c56 (kvm_s390_apxa_installed+0x46/0x98) [...] [ 386.098804] [<000000000013627c>] kvm_arch_init_vm+0x29c/0x358 [ 386.098806] [<000000000012d008>] kvm_dev_ioctl+0xc0/0x460 [ 386.098809] [<00000000002c639a>] do_vfs_ioctl+0x332/0x508 [ 386.098811] [<00000000002c660e>] SyS_ioctl+0x9e/0xb0 [ 386.098814] [<000000000070476a>] system_call+0xd6/0x258 [ 386.098815] [<000003fffc7400a2>] 0x3fffc7400a2 Lets add an extable entry and provide a zeroed config in that case. Reported-by: Stefan Zimmermann <stzi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com> Tested-by: Stefan Zimmermann <stzi@linux.vnet.ibm.com>
2015-03-04powerpc/iommu: Remove IOMMU device references via bus notifierNishanth Aravamudan4-26/+34
After d905c5df9aef ("PPC: POWERNV: move iommu_add_device earlier"), the refcnt on the kobject backing the IOMMU group for a PCI device is elevated by each call to pci_dma_dev_setup_pSeriesLP() (via set_iommu_table_base_and_group). When we go to dlpar a multi-function PCI device out: iommu_reconfig_notifier -> iommu_free_table -> iommu_group_put BUG_ON(tbl->it_group) We trip this BUG_ON, because there are still references on the table, so it is not freed. Fix this by moving the powernv bus notifier to common code and calling it for both powernv and pseries. Fixes: d905c5df9aef ("PPC: POWERNV: move iommu_add_device earlier") Signed-off-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com> Tested-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-03-04powerpc/smp: Wait until secondaries are active & onlineMichael Ellerman1-2/+2
Anton has a busy ppc64le KVM box where guests sometimes hit the infamous "kernel BUG at kernel/smpboot.c:134!" issue during boot: BUG_ON(td->cpu != smp_processor_id()); Basically a per CPU hotplug thread scheduled on the wrong CPU. The oops output confirms it: CPU: 0 Comm: watchdog/130 The problem is that we aren't ensuring the CPU active bit is set for the secondary before allowing the master to continue on. The master unparks the secondary CPU's kthreads and the scheduler looks for a CPU to run on. It calls select_task_rq() and realises the suggested CPU is not in the cpus_allowed mask. It then ends up in select_fallback_rq(), and since the active bit isnt't set we choose some other CPU to run on. This seems to have been introduced by 6acbfb96976f "sched: Fix hotplug vs. set_cpus_allowed_ptr()", which changed from setting active before online to setting active after online. However that was in turn fixing a bug where other code assumed an active CPU was also online, so we can't just revert that fix. The simplest fix is just to spin waiting for both active & online to be set. We already have a barrier prior to set_cpu_online() (which also sets active), to ensure all other setup is completed before online & active are set. Fixes: 6acbfb96976f ("sched: Fix hotplug vs. set_cpus_allowed_ptr()") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-03-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds8-4/+47
Pull networking fixes from David Miller: 1) If an IPVS tunnel is created with a mixed-family destination address, it cannot be removed. Fix from Alexey Andriyanov. 2) Fix module refcount underflow in netfilter's nft_compat, from Pablo Neira Ayuso. 3) Generic statistics infrastructure can reference variables sitting on a released function stack, therefore use dynamic allocation always. Fix from Ignacy Gawędzki. 4) skb_copy_bits() return value test is inverted in ip_check_defrag(). 5) Fix network namespace exit in openvswitch, we have to release all of the per-net vports. From Pravin B Shelar. 6) Fix signedness bug in CAIF's cfpkt_iterate(), from Dan Carpenter. 7) Fix rhashtable grow/shrink behavior, only expand during inserts and shrink during deletes. From Daniel Borkmann. 8) Netdevice names with semicolons should never be allowed, because they serve as a separator. From Matthew Thode. 9) Use {,__}set_current_state() where appropriate, from Fabian Frederick. 10) Revert byte queue limits support in r8169 driver, it's causing regressions we can't figure out. 11) tcp_should_expand_sndbuf() erroneously uses tp->packets_out to measure packets in flight, properly use tcp_packets_in_flight() instead. From Neal Cardwell. 12) Fix accidental removal of support for bluetooth in CSR based Intel wireless cards. From Marcel Holtmann. 13) We accidently added a behavioral change between native and compat tasks, wrt testing the MSG_CMSG_COMPAT bit. Just ignore it if the user happened to set it in a native binary as that was always the behavior we had. From Catalin Marinas. 14) Check genlmsg_unicast() return valud in hwsim netlink tx frame handling, from Bob Copeland. 15) Fix stale ->radar_required setting in mac80211 that can prevent starting new scans, from Eliad Peller. 16) Fix memory leak in nl80211 monitor, from Johannes Berg. 17) Fix race in TX index handling in xen-netback, from David Vrabel. 18) Don't enable interrupts in amx-xgbe driver until all software et al. state is ready for the interrupt handler to run. From Thomas Lendacky. 19) Add missing netlink_ns_capable() checks to rtnl_newlink(), from Eric W Biederman. 20) The amount of header space needed in macvtap was not calculated properly, fix it otherwise we splat past the beginning of the packet. From Eric Dumazet. 21) Fix bcmgenet TCP TX perf regression, from Jaedon Shin. 22) Don't raw initialize or mod timers, use setup_timer() and mod_timer() instead. From Vaishali Thakkar. 23) Fix software maintained statistics in bcmgenet and systemport drivers, from Florian Fainelli. 24) DMA descriptor updates in sh_eth need proper memory barriers, from Ben Hutchings. 25) Don't do UDP Fragmentation Offload on RAW sockets, from Michal Kubecek. 26) Openvswitch's non-masked set actions aren't constructed properly into netlink messages, fix from Joe Stringer. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (116 commits) openvswitch: Fix serialization of non-masked set actions. gianfar: Reduce logging noise seen due to phy polling if link is down ibmveth: Add function to enable live MAC address changes net: bridge: add compile-time assert for cb struct size udp: only allow UFO for packets from SOCK_DGRAM sockets sh_eth: Really fix padding of short frames on TX Revert "sh_eth: Enable Rx descriptor word 0 shift for r8a7790" sh_eth: Fix RX recovery on R-Car in case of RX ring underrun sh_eth: Ensure proper ordering of descriptor active bit write/read net/mlx4_en: Disbale GRO for incoming loopback/selftest packets net/mlx4_core: Fix wrong mask and error flow for the update-qp command net: systemport: fix software maintained statistics net: bcmgenet: fix software maintained statistics rxrpc: don't multiply with HZ twice rxrpc: terminate retrans loop when sending of skb fails net/hsr: Fix NULL pointer dereference and refcnt bugs when deleting a HSR interface. net: pasemi: Use setup_timer and mod_timer net: stmmac: Use setup_timer and mod_timer net: 8390: axnet_cs: Use setup_timer and mod_timer net: 8390: pcnet_cs: Use setup_timer and mod_timer ...
2015-03-03KVM: s390/cpacf: Enable key wrapping by defaultTony Krowiak1-3/+7
z/VM and LPAR enable key wrapping by default, lets do the same on KVM. Signed-off-by: Tony Krowiak <akrowiak@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-03-02KVM: MIPS: Enable after disabling interruptTapasweni Pathak1-0/+1
Enable disabled interrupt, on unsuccessful operation. Found by Coccinelle. Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2015-03-02KVM: MIPS: Fix trace event to save PC directlyJames Hogan1-3/+3
Currently the guest exit trace event saves the VCPU pointer to the structure, and the guest PC is retrieved by dereferencing it when the event is printed rather than directly from the trace record. This isn't safe as the printing may occur long afterwards, after the PC has changed and potentially after the VCPU has been freed. Usually this results in the same (wrong) PC being printed for multiple trace events. It also isn't portable as userland has no way to access the VCPU data structure when interpreting the trace record itself. Lets save the actual PC in the structure so that the correct value is accessible later. Fixes: 669e846e6c4e ("KVM/MIPS32: MIPS arch specific APIs for KVM") Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Gleb Natapov <gleb@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Cc: <stable@vger.kernel.org> # v3.10+ Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2015-03-02KVM: SVM: fix interrupt injection (apic->isr_count always 0)Radim Krčmář2-8/+2
In commit b4eef9b36db4, we started to use hwapic_isr_update() != NULL instead of kvm_apic_vid_enabled(vcpu->kvm). This didn't work because SVM had it defined and "apicv" path in apic_{set,clear}_isr() does not change apic->isr_count, because it should always be 1. The initial value of apic->isr_count was based on kvm_apic_vid_enabled(vcpu->kvm), which is always 0 for SVM, so KVM could have injected interrupts when it shouldn't. Fix it by implicitly setting SVM's hwapic_isr_update to NULL and make the initial isr_count depend on hwapic_isr_update() for good measure. Fixes: b4eef9b36db4 ("kvm: x86: vmx: NULL out hwapic_isr_update() in case of !enable_apicv") Reported-and-tested-by: Borislav Petkov <bp@suse.de> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2015-03-02Merge tag 'metag-fixes-v4.0-1' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag Pull arch/metag fix from James Hogan: "This is just a single patch to fix the KSTK_EIP() and KSTK_ESP() macros for metag which have always been erronously returning the PC and stack pointer of the task's kernel context rather than from its user context saved at entry from userland into the kernel, which affects the contents of /proc/<pid>/maps and /proc/<pid>/stat" * tag 'metag-fixes-v4.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag: metag: Fix KSTK_EIP() and KSTK_ESP() macros
2015-03-02s390/mm: fix incorrect ASCE after crst_table_downgradeMartin Schwidefsky1-1/+1
The switch_mm function does nothing in case the prev and next mm are the same. It can happen that a crst_table_downgrade has changed the top-level pgd in the meantime on a different CPU. Always store the new ASCE to be picked up in entry.S. [heiko.carstens@de.ibm.com]: Bug was introduced with git commit 53e857f30867 ("s390/mm,tlb: race of lazy TLB flush vs. recreation of TLB entries") and causes random crashes due to broken page tables being used. Reported-by: Dominik Vogt <vogt@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
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