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2014-08-30kexec: remove CONFIG_KEXEC dependency on cryptoVivek Goyal1-2/+0
New system call depends on crypto. As it did not have a separate config option, CONFIG_KEXEC was modified to select CRYPTO and CRYPTO_SHA256. But now previous patch introduced a new config option for new syscall. So CONFIG_KEXEC does not require crypto. Remove that dependency. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Shaun Ruffell <sruffell@digium.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-08-19MIPS: OCTEON: make get_system_type() thread-safeAaro Koskinen1-5/+13
get_system_type() is not thread-safe on OCTEON. It uses static data, also more dangerous issue is that it's calling cvmx_fuse_read_byte() every time without any synchronization. Currently it's possible to get processes stuck looping forever in kernel simply by launching multiple readers of /proc/cpuinfo: (while true; do cat /proc/cpuinfo > /dev/null; done) & (while true; do cat /proc/cpuinfo > /dev/null; done) & ... Fix by initializing the system type string only once during the early boot. Signed-off-by: Aaro Koskinen <aaro.koskinen@nsn.com> Cc: stable@vger.kernel.org Reviewed-by: Markos Chandras <markos.chandras@imgtec.com> Patchwork: http://patchwork.linux-mips.org/patch/7437/ Signed-off-by: James Hogan <james.hogan@imgtec.com>
2014-08-19MIPS: CPS: Initialize EVA before bringing up VPEs from secondary coresMarkos Chandras1-0/+4
The CPS code is doing several memory loads when configuring the VPEs from secondary cores, so the segmentation control registers must be initialized in time otherwise the kernel will crash with strange TLB exceptions. Reviewed-by: Paul Burton <paul.burton@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Patchwork: http://patchwork.linux-mips.org/patch/7424/ Signed-off-by: James Hogan <james.hogan@imgtec.com>
2014-08-19MIPS: Malta: EVA: Rename 'eva_entry' to 'platform_eva_init'Markos Chandras1-6/+16
Rename 'eva_entry' to 'platform_eva_init' as required by the new 'eva_init' macro in the eva.h header. Since this macro is now used in a platform dependent way, it must not depend on its caller so move the t1 register initialization inside this macro. Also set the .reorder assembler option in case the caller may have previously set .noreorder. This may allow a few assembler optimizations. Finally include missing headers and document the register usage for this macro. Reviewed-by: Paul Burton <paul.burton@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Patchwork: http://patchwork.linux-mips.org/patch/7423/ Signed-off-by: James Hogan <james.hogan@imgtec.com>
2014-08-19MIPS: EVA: Add new EVA headerMarkos Chandras1-0/+43
Generic code may need to perform certain operations when EVA is enabled, for example, configure the segmentation registers during boot. In order to avoid using more CONFIG_EVA ifdefs in the arch code, such functions will be added in this header instead. Initially this header contains a macro which will be used by generic code later on during VPEs configuration on secondary cores. All it does is to call the platform specific EVA init code in case EVA is enabled. Reviewed-by: Paul Burton <paul.burton@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Patchwork: http://patchwork.linux-mips.org/patch/7422/ Signed-off-by: James Hogan <james.hogan@imgtec.com>
2014-08-19MIPS: scall64-o32: Fix indirect syscall detectionMarkos Chandras1-4/+8
Commit 4c21b8fd8f14 (MIPS: seccomp: Handle indirect system calls (o32)) added indirect syscall detection for O32 processes running on MIPS64 but it did not work as expected. The reason is the the scall64-o32 implementation differs compared to scall32-o32. In the former, the v0 (syscall number) register contains the absolute syscall number (4000 + X) whereas in the latter it contains the relative syscall number (X). Fix the code to avoid doing an extra addition, and load the v0 register directly to the first argument for syscall_trace_enter. Moreover, set the .reorder assembler option in order to have better control on this part of the assembly code. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Patchwork: http://patchwork.linux-mips.org/patch/7481/ Cc: <stable@vger.kernel.org> # v3.15+ Signed-off-by: James Hogan <james.hogan@imgtec.com>
2014-08-19MIPS: syscall: Fix AUDIT value for O32 processes on MIPS64Markos Chandras1-3/+5
On MIPS64, O32 processes set both TIF_32BIT_ADDR and TIF_32BIT_REGS so the previous condition treated O32 applications as N32 when evaluating seccomp filters. Fix the condition to check both TIF_32BIT_{REGS, ADDR} for the N32 AUDIT flag. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Patchwork: http://patchwork.linux-mips.org/patch/7480/ Cc: <stable@vger.kernel.org> # v3.15+ Signed-off-by: James Hogan <james.hogan@imgtec.com>
2014-08-19MIPS: Loongson: Fix COP2 usage for preemptible kernelHuacai Chen1-4/+4
In preemptible kernel, only TIF_USEDFPU flag is reliable to distinguish whether _init_fpu()/_restore_fp() is needed. Because the value of the CP0_Status.CU1 isn't changed during preemption. V2: Fix coding style. Signed-off-by: Huacai Chen <chenhc@lemote.com> Cc: John Crispin <john@phrozen.org> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Zhangjin Wu <wuzhangjin@gmail.com> Patchwork: https://patchwork.linux-mips.org/patch/7515/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-19MIPS: NL: Fix nlm_xlp_defconfig build errorGuenter Roeck1-7/+0
The nlm_xlp_defconfig build fails with ./arch/mips/include/asm/mach-netlogic/topology.h:15:0: error: "topology_core_id" redefined [-Werror] In file included from include/linux/smp.h:59:0, [ ...] from arch/mips/mm/dma-default.c:12: ./arch/mips/include/asm/smp.h:41:0: note: this is the location of the previous definition and similar errors. This is caused by commit bda4584cd943d7 ("MIPS: Support CPU topology files in sysfs") which adds the defines to arch/mips/include/asm/smp.h. Remove the defines from arch/mips/include/asm/mach-netlogic/topology.h as no longer necessary. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: Huacai Chen <chenhc@lemote.com> Cc: Andreas Herrmann <andreas.herrmann@caviumnetworks.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7513/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-19MIPS: Remove race window in page fault handlingLars Persson2-13/+22
Multicore MIPSes without I/D hardware coherency suffered from a race condition in the page fault handler. The page table entry was published before any pending lazy D-cache flush was committed, hence it allowed execution of stale page cache data by other VPEs in the system. To make the cache handling safe we need to perform flushing already in the set_pte_at function. MIPSes without coherent I-caches can get a small increase in flushes due to the unavailability of the execute flag in set_pte_at. [ralf@linux-mips.org: outlining set_pte_at() saves a good k in a test build, so I moved its definition from pgtable.h to cache.c.] Signed-off-by: Lars Persson <larper@axis.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7511/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-19MIPS: Malta: Improve system memory detection for '{e, }memsize' >= 2GMarkos Chandras1-4/+10
Using kstrtol to parse the "{e,}memsize" variables was wrong because this parses signed long numbers. In case of '{e,}memsize' >= 2G, the top bit is set, resulting to -ERANGE errors and possibly random system memory boundaries. We fix this by replacing "kstrtol" with "kstrtoul". We also improve the code to check the kstrtoul return value and print a warning if an error was returned. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Cc: <stable@vger.kernel.org> # v3.15+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7543/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-19MIPS: Alchemy: Fix db1200 PSC clock enablementManuel Lauss1-5/+1
Enable PSC0 (I2C/SPI) clock and leave PSC1 (Audio) alone. This patch restores functionality to both Audio and I2C/SPI. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Cc: Linux-MIPS <linux-mips@linux-mips.org> Patchwork: https://patchwork.linux-mips.org/patch/7544/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-19MIPS: BCM47XX: Fix reboot problem on BCM4705/BCM4785Hauke Mehrtens1-2/+11
This adds some code based on code from the Broadcom GPL tar to fix the reboot problems on BCM4705/BCM4785. I tried rebooting my device for ~10 times and have never seen a problem. This reverts the changes in the previous commit and adds the real fix as suggested by Rafał. Setting bit 22 in Reg 22, sel 4 puts the BIU (Bus Interface Unit) into async mode. The previous commit was 316cad5c1d4daee998cd1f83ccdb437f6f20d45c [MIPS: BCM47XX: make reboot more relaiable] Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Cc: jogo@openwrt.org Cc: zajec5@gmail.com Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7545/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-19MIPS: Remove duplicated include from numa.cWei Yongjun1-2/+0
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: Huacai Chen <chenhc@lemote.com> Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7537/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-19MIPS: Add common plat_irq_dispatch declarationSergey Ryazanov2-1/+2
Add common declaration to get rid of following sparse warning: "symbol 'plat_irq_dispatch' was not declared. Should it be static?" Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com> Cc: Linux MIPS <linux-mips@linux-mips.org> Patchwork: https://patchwork.linux-mips.org/patch/7539/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-19MIPS: MSP71xx: remove unused plat_irq_dispatch() argumentSergey Ryazanov1-1/+1
Remove unused argument to make the plat_irq_dispatch() function declaration similar to the realization of other platforms. Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com> Cc: Linux MIPS <linux-mips@linux-mips.org> Patchwork: https://patchwork.linux-mips.org/patch/7538/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-19MIPS: GIC: Remove useless parens from GICBIS().Ralf Baechle1-1/+1
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-19MIPS: perf: Mark pmu interupt IRQF_NO_THREADYang Wei1-1/+1
In RT kernel, I ran into the following calltrace, so PMU interrupts cannot be threaded in_atomic(): 1, irqs_disabled(): 1, pid: 0, name: swapper/0 INFO: lockdep is turned off. Call Trace: [<ffffffff8088595c>] dump_stack+0x1c/0x50 [<ffffffff801a958c>] __might_sleep+0x13c/0x148 [<ffffffff80891c54>] rt_spin_lock+0x3c/0xb0 [<ffffffff801ad29c>] __wake_up+0x3c/0x80 [<ffffffff80243ba4>] perf_event_wakeup+0x8c/0xf8 [<ffffffff80243c50>] perf_pending_event+0x40/0x78 [<ffffffff8023d88c>] irq_work_run+0x74/0xc0 [<ffffffff80152640>] mipsxx_pmu_handle_shared_irq+0x110/0x228 [<ffffffff8015276c>] mipsxx_pmu_handle_irq+0x14/0x30 [<ffffffff801ffda4>] handle_irq_event_percpu+0xbc/0x470 [<ffffffff80204478>] handle_percpu_irq+0x98/0xc8 [<ffffffff801ff284>] generic_handle_irq+0x4c/0x68 [<ffffffff8089748c>] do_IRQ+0x2c/0x48 [<ffffffff80105864>] plat_irq_dispatch+0x64/0xd0 [ralf@linux-mips.org: I don't see why based on this register dump the handler should be marked IRQF_NO_THREAD - but the handler is manipulating per-CPU resources so we don't want it to be rescheduled to another CPU.] Signed-off-by: Yang Wei <Wei.Yang@windriver.com> Cc: a.p.zijlstra@chello.nl Cc: paulus@samba.org Cc: mingo@redhat.com Cc: acme@kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7506/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-09Merge branch 'signal-cleanup' of ↵Linus Torvalds5-88/+55
git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc Pull arch signal handling cleanup from Richard Weinberger: "This patch series moves all remaining archs to the get_signal(), signal_setup_done() and sigsp() functions. Currently these archs use open coded variants of the said functions. Further, unused parameters get removed from get_signal_to_deliver(), tracehook_signal_handler() and signal_delivered(). At the end of the day we save around 500 lines of code." * 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (43 commits) powerpc: Use sigsp() openrisc: Use sigsp() mn10300: Use sigsp() mips: Use sigsp() microblaze: Use sigsp() metag: Use sigsp() m68k: Use sigsp() m32r: Use sigsp() hexagon: Use sigsp() frv: Use sigsp() cris: Use sigsp() c6x: Use sigsp() blackfin: Use sigsp() avr32: Use sigsp() arm64: Use sigsp() arc: Use sigsp() sas_ss_flags: Remove nested ternary if Rip out get_signal_to_deliver() Clean up signal_delivered() tracehook_signal_handler: Remove sig, info, ka and regs ...
2014-08-09Merge tag 'gpio-v3.17-1' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull GPIO update from Linus Walleij: "This is the bulk of GPIO changes for the v3.17 development cycle, and this time we got a lot of action going on and it will continue: - The core GPIO library implementation has been split up in three different files: - gpiolib.c for the latest and greatest and shiny GPIO library code using GPIO descriptors only - gpiolib-legacy.c for the old integer number space API that we are phasing out gradually - gpiolib-sysfs.c for the sysfs interface that we are not entirely happy with, but has to live on for ABI compatibility - Add a flags argument to *gpiod_get* functions, with some backward-compatibility macros to ease transitions. We should have had the flags there from the beginning it seems, now we need to clean up the mess. There is a plan on how to move forward here devised by Alexandre Courbot and Mark Brown - Split off a special <linux/gpio/machine.h> header for the board gpio table registration, as per example from the regulator subsystem - Start to kill off the return value from gpiochip_remove() by removing the __must_check attribute and removing all checks inside the drivers/gpio directory. The rationale is: well what were we supposed to do if there is an error code? Not much: print an error message. And gpiolib already does that. So make this function return void eventually - Some cleanups of hairy gpiolib code, make some functions not to be used outside the library private and make sure they are not exported, remove gpiod_lock/unlock_as_irq() as the existing function is for driver-internal use and fine as it is, delete gpio_ensure_requested() as it is not meaningful anymore - Support the GPIOF_ACTIVE_LOW flag from gpio_request_one() function calls, which is logical since this is already supported when referencing GPIOs from e.g. device trees - Switch STMPE, intel-mid, lynxpoint and ACPI (!) to use the gpiolib irqchip helpers cutting down on GPIO irqchip boilerplate a bit more - New driver for the Zynq GPIO block - The usual incremental improvements around a bunch of drivers - Janitorial syntactic and semantic cleanups by Jingoo Han, and Rickard Strandqvist especially" * tag 'gpio-v3.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (37 commits) MAINTAINERS: update GPIO include files gpio: add missing includes in machine.h gpio: add flags argument to gpiod_get*() functions MAINTAINERS: Update Samsung pin control entry gpio / ACPI: Move event handling registration to gpiolib irqchip helpers gpio: lynxpoint: Convert to use gpiolib irqchip gpio: split gpiod board registration into machine header gpio: remove gpio_ensure_requested() gpio: remove useless check in gpiolib_sysfs_init() gpiolib: Export gpiochip_request_own_desc and gpiochip_free_own_desc gpio: move gpio_ensure_requested() into legacy C file gpio: remove gpiod_lock/unlock_as_irq() gpio: make gpiochip_get_desc() gpiolib-private gpio: simplify gpiochip_export() gpio: remove export of private of_get_named_gpio_flags() gpio: Add support for GPIOF_ACTIVE_LOW to gpio_request_one functions gpio: zynq: Clear pending interrupt when enabling a IRQ gpio: drop retval check enforcing from gpiochip_remove() gpio: remove all usage of gpio_remove retval in driver/gpio devicetree: Add Zynq GPIO devicetree bindings documentation ...
2014-08-09Merge branch 'akpm' (second patchbomb from Andrew Morton)Linus Torvalds1-0/+2
Merge more incoming from Andrew Morton: "Two new syscalls: memfd_create in "shm: add memfd_create() syscall" kexec_file_load in "kexec: implementation of new syscall kexec_file_load" And: - Most (all?) of the rest of MM - Lots of the usual misc bits - fs/autofs4 - drivers/rtc - fs/nilfs - procfs - fork.c, exec.c - more in lib/ - rapidio - Janitorial work in filesystems: fs/ufs, fs/reiserfs, fs/adfs, fs/cramfs, fs/romfs, fs/qnx6. - initrd/initramfs work - "file sealing" and the memfd_create() syscall, in tmpfs - add pci_zalloc_consistent, use it in lots of places - MAINTAINERS maintenance - kexec feature work" * emailed patches from Andrew Morton <akpm@linux-foundation.org: (193 commits) MAINTAINERS: update nomadik patterns MAINTAINERS: update usb/gadget patterns MAINTAINERS: update DMA BUFFER SHARING patterns kexec: verify the signature of signed PE bzImage kexec: support kexec/kdump on EFI systems kexec: support for kexec on panic using new system call kexec-bzImage64: support for loading bzImage using 64bit entry kexec: load and relocate purgatory at kernel load time purgatory: core purgatory functionality purgatory/sha256: provide implementation of sha256 in purgaotory context kexec: implementation of new syscall kexec_file_load kexec: new syscall kexec_file_load() declaration kexec: make kexec_segment user buffer pointer a union resource: provide new functions to walk through resources kexec: use common function for kimage_normal_alloc() and kimage_crash_alloc() kexec: move segment verification code in a separate function kexec: rename unusebale_pages to unusable_pages kernel: build bin2c based on config option CONFIG_BUILD_BIN2C bin2c: move bin2c in scripts/basic shm: wait for pins to be released when sealing ...
2014-08-09kexec: load and relocate purgatory at kernel load timeVivek Goyal1-0/+2
Load purgatory code in RAM and relocate it based on the location. Relocation code has been inspired by module relocation code and purgatory relocation code in kexec-tools. Also compute the checksums of loaded kexec segments and store them in purgatory. Arch independent code provides this functionality so that arch dependent bootloaders can make use of it. Helper functions are provided to get/set symbol values in purgatory which are used by bootloaders later to set things like stack and entry point of second kernel etc. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Cc: Borislav Petkov <bp@suse.de> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Eric Biederman <ebiederm@xmission.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Greg Kroah-Hartman <greg@kroah.com> Cc: Dave Young <dyoung@redhat.com> Cc: WANG Chao <chaowang@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-08-07Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-1/+1
Pull second round of KVM changes from Paolo Bonzini: "Here are the PPC and ARM changes for KVM, which I separated because they had small conflicts (respectively within KVM documentation, and with 3.16-rc changes). Since they were all within the subsystem, I took care of them. Stephen Rothwell reported some snags in PPC builds, but they are all fixed now; the latest linux-next report was clean. New features for ARM include: - KVM VGIC v2 emulation on GICv3 hardware - Big-Endian support for arm/arm64 (guest and host) - Debug Architecture support for arm64 (arm32 is on Christoffer's todo list) And for PPC: - Book3S: Good number of LE host fixes, enable HV on LE - Book3S HV: Add in-guest debug support This release drops support for KVM on the PPC440. As a result, the PPC merge removes more lines than it adds. :) I also included an x86 change, since Davidlohr tied it to an independent bug report and the reporter quickly provided a Tested-by; there was no reason to wait for -rc2" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (122 commits) KVM: Move more code under CONFIG_HAVE_KVM_IRQFD KVM: nVMX: fix "acknowledge interrupt on exit" when APICv is in use KVM: nVMX: Fix nested vmexit ack intr before load vmcs01 KVM: PPC: Enable IRQFD support for the XICS interrupt controller KVM: Give IRQFD its own separate enabling Kconfig option KVM: Move irq notifier implementation into eventfd.c KVM: Move all accesses to kvm::irq_routing into irqchip.c KVM: irqchip: Provide and use accessors for irq routing table KVM: Don't keep reference to irq routing table in irqfd struct KVM: PPC: drop duplicate tracepoint arm64: KVM: fix 64bit CP15 VM access for 32bit guests KVM: arm64: GICv3: mandate page-aligned GICV region arm64: KVM: GICv3: move system register access to msr_s/mrs_s KVM: PPC: PR: Handle FSCR feature deselects KVM: PPC: HV: Remove generic instruction emulation KVM: PPC: BOOKEHV: rename e500hv_spr to bookehv_spr KVM: PPC: Remove DCR handling KVM: PPC: Expose helper functions for data/inst faults KVM: PPC: Separate loadstore emulation from priv emulation KVM: PPC: Handle magic page in kvmppc_ld/st ...
2014-08-07Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds141-2652/+4905
Pull MIPS updates from Ralf Baechle: "This is the main pull request for 3.17. It contains: - misc Cavium Octeon, BCM47xx, BCM63xx and Alchemy updates - MIPS ptrace updates and cleanups - various fixes that will also go to -stable - a number of cleanups and small non-critical fixes. - NUMA support for the Loongson 3. - more support for MSA - support for MAAR - various FP enhancements and fixes" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (139 commits) MIPS: jz4740: remove unnecessary null test before debugfs_remove MIPS: Octeon: remove unnecessary null test before debugfs_remove_recursive MIPS: ZBOOT: implement stack protector in compressed boot phase MIPS: mipsreg: remove duplicate MIPS_CONF4_FTLBSETS_SHIFT MIPS: Bonito64: remove a duplicate define MIPS: Malta: initialise MAARs MIPS: Initialise MAARs MIPS: detect presence of MAARs MIPS: define MAAR register accessors & bits MIPS: mark MSA experimental MIPS: Don't build MSA support unless it can be used MIPS: consistently clear MSA flags when starting & copying threads MIPS: 16 byte align MSA vector context MIPS: disable preemption whilst initialising MSA MIPS: ensure MSA gets disabled during boot MIPS: fix read_msa_* & write_msa_* functions on non-MSA toolchains MIPS: fix MSA context for tasks which don't use FP first MIPS: init upper 64b of vector registers when MSA is first used MIPS: save/disable MSA in lose_fpu MIPS: preserve scalar FP CSR when switching vector context ...
2014-08-07Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds16-20/+0
Pull SCSI updates from James Bottomley: "This patch set consists of the usual driver updates (ufs, storvsc, pm8001 hpsa). It also has removal of the user space target driver code (everyone is using LIO now), a partial PCI MSI-X update, more multi-queue updates, conversion to 64 bit LUNs (so we could theoretically cope with any LUN returned by a device) and placeholder support for the ZBC device type (Shingle drives), plus an assortment of minor updates and bug fixes" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (143 commits) scsi: do not issue SCSI RSOC command to Promise Vtrak E610f vmw_pvscsi: Use pci_enable_msix_exact() instead of pci_enable_msix() pm8001: Fix invalid return when request_irq() failed lpfc: Remove superfluous call to pci_disable_msix() isci: Use pci_enable_msix_exact() instead of pci_enable_msix() bfa: Use pci_enable_msix_exact() instead of pci_enable_msix() bfa: Cleanup bfad_setup_intr() function bfa: Do not call pci_enable_msix() after it failed once fnic: Use pci_enable_msix_exact() instead of pci_enable_msix() scsi: use short driver name for per-driver cmd slab caches scsi_debug: support scsi-mq, queues and locks Drivers: add blist flags scsi: ufs: fix endianness sparse warnings scsi: ufs: make undeclared functions static bnx2i: Update driver version to 2.7.10.1 pm8001: fix a memory leak in nvmd_resp pm8001: fix update_flash pm8001: fix a memory leak in flash_update pm8001: Cleaning up uninitialized variables pm8001: Fix to remove null pointer checks that could never happen ...
2014-08-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds1-4/+4
Pull networking updates from David Miller: "Highlights: 1) Steady transitioning of the BPF instructure to a generic spot so all kernel subsystems can make use of it, from Alexei Starovoitov. 2) SFC driver supports busy polling, from Alexandre Rames. 3) Take advantage of hash table in UDP multicast delivery, from David Held. 4) Lighten locking, in particular by getting rid of the LRU lists, in inet frag handling. From Florian Westphal. 5) Add support for various RFC6458 control messages in SCTP, from Geir Ola Vaagland. 6) Allow to filter bridge forwarding database dumps by device, from Jamal Hadi Salim. 7) virtio-net also now supports busy polling, from Jason Wang. 8) Some low level optimization tweaks in pktgen from Jesper Dangaard Brouer. 9) Add support for ipv6 address generation modes, so that userland can have some input into the process. From Jiri Pirko. 10) Consolidate common TCP connection request code in ipv4 and ipv6, from Octavian Purdila. 11) New ARP packet logger in netfilter, from Pablo Neira Ayuso. 12) Generic resizable RCU hash table, with intial users in netlink and nftables. From Thomas Graf. 13) Maintain a name assignment type so that userspace can see where a network device name came from (enumerated by kernel, assigned explicitly by userspace, etc.) From Tom Gundersen. 14) Automatic flow label generation on transmit in ipv6, from Tom Herbert. 15) New packet timestamping facilities from Willem de Bruijn, meant to assist in measuring latencies going into/out-of the packet scheduler, latency from TCP data transmission to ACK, etc" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1536 commits) cxgb4 : Disable recursive mailbox commands when enabling vi net: reduce USB network driver config options. tg3: Modify tg3_tso_bug() to handle multiple TX rings amd-xgbe: Perform phy connect/disconnect at dev open/stop amd-xgbe: Use dma_set_mask_and_coherent to set DMA mask net: sun4i-emac: fix memory leak on bad packet sctp: fix possible seqlock seadlock in sctp_packet_transmit() Revert "net: phy: Set the driver when registering an MDIO bus device" cxgb4vf: Turn off SGE RX/TX Callback Timers and interrupts in PCI shutdown routine team: Simplify return path of team_newlink bridge: Update outdated comment on promiscuous mode net-timestamp: ACK timestamp for bytestreams net-timestamp: TCP timestamping net-timestamp: SCHED timestamp on entering packet scheduler net-timestamp: add key to disambiguate concurrent datagrams net-timestamp: move timestamp flags out of sk_flags net-timestamp: extend SCM_TIMESTAMPING ancillary data struct cxgb4i : Move stray CPL definitions to cxgb4 driver tcp: reduce spurious retransmits due to transient SACK reneging qlcnic: Initialize dcbnl_ops before register_netdev ...
2014-08-06Merge branch 'next' of ↵Linus Torvalds5-6/+13
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security Pull security subsystem updates from James Morris: "In this release: - PKCS#7 parser for the key management subsystem from David Howells - appoint Kees Cook as seccomp maintainer - bugfixes and general maintenance across the subsystem" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (94 commits) X.509: Need to export x509_request_asymmetric_key() netlabel: shorter names for the NetLabel catmap funcs/structs netlabel: fix the catmap walking functions netlabel: fix the horribly broken catmap functions netlabel: fix a problem when setting bits below the previously lowest bit PKCS#7: X.509 certificate issuer and subject are mandatory fields in the ASN.1 tpm: simplify code by using %*phN specifier tpm: Provide a generic means to override the chip returned timeouts tpm: missing tpm_chip_put in tpm_get_random() tpm: Properly clean sysfs entries in error path tpm: Add missing tpm_do_selftest to ST33 I2C driver PKCS#7: Use x509_request_asymmetric_key() Revert "selinux: fix the default socket labeling in sock_graft()" X.509: x509_request_asymmetric_keys() doesn't need string length arguments PKCS#7: fix sparse non static symbol warning KEYS: revert encrypted key change ima: add support for measuring and appraising firmware firmware_class: perform new LSM checks security: introduce kernel_fw_from_file hook PKCS#7: Missing inclusion of linux/err.h ...
2014-08-06mips: Use sigsp()Richard Weinberger3-9/+7
Use sigsp() instead of the open coded variant. Signed-off-by: Richard Weinberger <richard@nod.at>
2014-08-06mips: Use get_signal() signal_setup_done()Richard Weinberger5-84/+53
Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2014-08-05Merge tag 'signed-kvm-ppc-next' of git://github.com/agraf/linux-2.6 into kvmPaolo Bonzini1-1/+1
Patch queue for ppc - 2014-08-01 Highlights in this release include: - BookE: Rework instruction fetch, not racy anymore now - BookE HV: Fix ONE_REG accessors for some in-hardware registers - Book3S: Good number of LE host fixes, enable HV on LE - Book3S: Some misc bug fixes - Book3S HV: Add in-guest debug support - Book3S HV: Preload cache lines on context switch - Remove 440 support Alexander Graf (31): KVM: PPC: Book3s PR: Disable AIL mode with OPAL KVM: PPC: Book3s HV: Fix tlbie compile error KVM: PPC: Book3S PR: Handle hyp doorbell exits KVM: PPC: Book3S PR: Fix ABIv2 on LE KVM: PPC: Book3S PR: Fix sparse endian checks PPC: Add asm helpers for BE 32bit load/store KVM: PPC: Book3S HV: Make HTAB code LE host aware KVM: PPC: Book3S HV: Access guest VPA in BE KVM: PPC: Book3S HV: Access host lppaca and shadow slb in BE KVM: PPC: Book3S HV: Access XICS in BE KVM: PPC: Book3S HV: Fix ABIv2 on LE KVM: PPC: Book3S HV: Enable for little endian hosts KVM: PPC: Book3S: Move vcore definition to end of kvm_arch struct KVM: PPC: Deflect page write faults properly in kvmppc_st KVM: PPC: Book3S: Stop PTE lookup on write errors KVM: PPC: Book3S: Add hack for split real mode KVM: PPC: Book3S: Make magic page properly 4k mappable KVM: PPC: Remove 440 support KVM: Rename and add argument to check_extension KVM: Allow KVM_CHECK_EXTENSION on the vm fd KVM: PPC: Book3S: Provide different CAPs based on HV or PR mode KVM: PPC: Implement kvmppc_xlate for all targets KVM: PPC: Move kvmppc_ld/st to common code KVM: PPC: Remove kvmppc_bad_hva() KVM: PPC: Use kvm_read_guest in kvmppc_ld KVM: PPC: Handle magic page in kvmppc_ld/st KVM: PPC: Separate loadstore emulation from priv emulation KVM: PPC: Expose helper functions for data/inst faults KVM: PPC: Remove DCR handling KVM: PPC: HV: Remove generic instruction emulation KVM: PPC: PR: Handle FSCR feature deselects Alexey Kardashevskiy (1): KVM: PPC: Book3S: Fix LPCR one_reg interface Aneesh Kumar K.V (4): KVM: PPC: BOOK3S: PR: Fix PURR and SPURR emulation KVM: PPC: BOOK3S: PR: Emulate virtual timebase register KVM: PPC: BOOK3S: PR: Emulate instruction counter KVM: PPC: BOOK3S: HV: Update compute_tlbie_rb to handle 16MB base page Anton Blanchard (2): KVM: PPC: Book3S HV: Fix ABIv2 indirect branch issue KVM: PPC: Assembly functions exported to modules need _GLOBAL_TOC() Bharat Bhushan (10): kvm: ppc: bookehv: Added wrapper macros for shadow registers kvm: ppc: booke: Use the shared struct helpers of SRR0 and SRR1 kvm: ppc: booke: Use the shared struct helpers of SPRN_DEAR kvm: ppc: booke: Add shared struct helpers of SPRN_ESR kvm: ppc: booke: Use the shared struct helpers for SPRN_SPRG0-7 kvm: ppc: Add SPRN_EPR get helper function kvm: ppc: bookehv: Save restore SPRN_SPRG9 on guest entry exit KVM: PPC: Booke-hv: Add one reg interface for SPRG9 KVM: PPC: Remove comment saying SPRG1 is used for vcpu pointer KVM: PPC: BOOKEHV: rename e500hv_spr to bookehv_spr Michael Neuling (1): KVM: PPC: Book3S HV: Add H_SET_MODE hcall handling Mihai Caraman (8): KVM: PPC: e500mc: Enhance tlb invalidation condition on vcpu schedule KVM: PPC: e500: Fix default tlb for victim hint KVM: PPC: e500: Emulate power management control SPR KVM: PPC: e500mc: Revert "add load inst fixup" KVM: PPC: Book3e: Add TLBSEL/TSIZE defines for MAS0/1 KVM: PPC: Book3s: Remove kvmppc_read_inst() function KVM: PPC: Allow kvmppc_get_last_inst() to fail KVM: PPC: Bookehv: Get vcpu's last instruction for emulation Paul Mackerras (4): KVM: PPC: Book3S: Controls for in-kernel sPAPR hypercall handling KVM: PPC: Book3S: Allow only implemented hcalls to be enabled or disabled KVM: PPC: Book3S PR: Take SRCU read lock around RTAS kvm_read_guest() call KVM: PPC: Book3S: Make kvmppc_ld return a more accurate error indication Stewart Smith (2): Split out struct kvmppc_vcore creation to separate function Use the POWER8 Micro Partition Prefetch Engine in KVM HV on POWER8 Conflicts: Documentation/virtual/kvm/api.txt
2014-08-05Merge tag 'staging-3.17-rc1' of ↵Linus Torvalds2-5/+8
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging driver updates from Greg KH: "Here's the big pull request for the staging driver tree for 3.17-rc1. Lots of things in here, over 2000 patches, but the best part is this: 1480 files changed, 39070 insertions(+), 254659 deletions(-) Thanks to the great work of Kristina Martšenko, 14 different staging drivers have been removed from the tree as they were obsolete and no one was willing to work on cleaning them up. Other than the driver removals, loads of cleanups are in here (comedi, lustre, etc.) as well as the usual IIO driver updates and additions. All of this has been in the linux-next tree for a while" * tag 'staging-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (2199 commits) staging: comedi: addi_apci_1564: remove diagnostic interrupt support code staging: comedi: addi_apci_1564: add subdevice to check diagnostic status staging: wlan-ng: coding style problem fix staging: wlan-ng: fixing coding style problems staging: comedi: ii_pci20kc: request and ioremap memory staging: lustre: bitwise vs logical typo staging: dgnc: Remove unneeded dgnc_trace.c and dgnc_trace.h staging: dgnc: rephrase comment staging: comedi: ni_tio: remove some dead code staging: rtl8723au: Fix static symbol sparse warning staging: rtl8723au: usb_dvobj_init(): Remove unused variable 'pdev_desc' staging: rtl8723au: Do not duplicate kernel provided USB macros staging: rtl8723au: Remove never set struct pwrctrl_priv.bHWPowerdown staging: rtl8723au: Remove two never set variables staging: rtl8723au: RSSI_test is never set staging:r8190: coding style: Fixed checkpatch reported Error staging:r8180: coding style: Fixed too long lines staging:r8180: coding style: Fixed commenting style staging: lustre: ptlrpc: lproc_ptlrpc.c - fix dereferenceing user space buffer staging: lustre: ldlm: ldlm_resource.c - fix dereferenceing user space buffer ...
2014-08-05Merge branch 'locking-core-for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking updates from Ingo Molnar: "The main changes in this cycle are: - big rtmutex and futex cleanup and robustification from Thomas Gleixner - mutex optimizations and refinements from Jason Low - arch_mutex_cpu_relax() removal and related cleanups - smaller lockdep tweaks" * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits) arch, locking: Ciao arch_mutex_cpu_relax() locking/lockdep: Only ask for /proc/lock_stat output when available locking/mutexes: Optimize mutex trylock slowpath locking/mutexes: Try to acquire mutex only if it is unlocked locking/mutexes: Delete the MUTEX_SHOW_NO_WAITER macro locking/mutexes: Correct documentation on mutex optimistic spinning rtmutex: Make the rtmutex tester depend on BROKEN futex: Simplify futex_lock_pi_atomic() and make it more robust futex: Split out the first waiter attachment from lookup_pi_state() futex: Split out the waiter check from lookup_pi_state() futex: Use futex_top_waiter() in lookup_pi_state() futex: Make unlock_pi more robust rtmutex: Avoid pointless requeueing in the deadlock detection chain walk rtmutex: Cleanup deadlock detector debug logic rtmutex: Confine deadlock logic to futex rtmutex: Simplify remove_waiter() rtmutex: Document pi chain walk rtmutex: Clarify the boost/deboost part rtmutex: No need to keep task ref for lock owner check rtmutex: Simplify and document try_to_take_rtmutex() ...
2014-08-04Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds20-779/+750
Pull KVM changes from Paolo Bonzini: "These are the x86, MIPS and s390 changes; PPC and ARM will come in a few days. MIPS and s390 have little going on this release; just bugfixes, some small, some larger. The highlights for x86 are nested VMX improvements (Jan Kiszka), optimizations for old processor (up to Nehalem, by me and Bandan Das), and a lot of x86 emulator bugfixes (Nadav Amit). Stephen Rothwell reported a trivial conflict with the tracing branch" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (104 commits) x86/kvm: Resolve shadow warnings in macro expansion KVM: s390: rework broken SIGP STOP interrupt handling KVM: x86: always exit on EOIs for interrupts listed in the IOAPIC redir table KVM: vmx: remove duplicate vmx_mpx_supported() prototype KVM: s390: Fix memory leak on busy SIGP stop x86/kvm: Resolve shadow warning from min macro kvm: Resolve missing-field-initializers warnings Replace NR_VMX_MSR with its definition KVM: x86: Assertions to check no overrun in MSR lists KVM: x86: set rflags.rf during fault injection KVM: x86: Setting rflags.rf during rep-string emulation KVM: x86: DR6/7.RTM cannot be written KVM: nVMX: clean up nested_release_vmcs12 and code around it KVM: nVMX: fix lifetime issues for vmcs02 KVM: x86: Defining missing x86 vectors KVM: x86: emulator injects #DB when RFLAGS.RF is set KVM: x86: Cleanup of rflags.rf cleaning KVM: x86: Clear rflags.rf on emulated instructions KVM: x86: popf emulation should not change RF KVM: x86: Clearing rflags.rf upon skipped emulated instruction ...
2014-08-04Merge tag 'trace-3.17' of ↵Linus Torvalds3-8/+3
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing updates from Steven Rostedt: "This pull request has a lot of work done. The main thing is the changes to the ftrace function callback infrastructure. It's introducing a way to allow different functions to call directly different trampolines instead of all calling the same "mcount" one. The only user of this for now is the function graph tracer, which always had a different trampoline, but the function tracer trampoline was called and did basically nothing, and then the function graph tracer trampoline was called. The difference now, is that the function graph tracer trampoline can be called directly if a function is only being traced by the function graph trampoline. If function tracing is also happening on the same function, the old way is still done. The accounting for this takes up more memory when function graph tracing is activated, as it needs to keep track of which functions it uses. I have a new way that wont take as much memory, but it's not ready yet for this merge window, and will have to wait for the next one. Another big change was the removal of the ftrace_start/stop() calls that were used by the suspend/resume code that stopped function tracing when entering into suspend and resume paths. The stop of ftrace was done because there was some function that would crash the system if one called smp_processor_id()! The stop/start was a big hammer to solve the issue at the time, which was when ftrace was first introduced into Linux. Now ftrace has better infrastructure to debug such issues, and I found the problem function and labeled it with "notrace" and function tracing can now safely be activated all the way down into the guts of suspend and resume Other changes include clean ups of uprobe code, clean up of the trace_seq() code, and other various small fixes and clean ups to ftrace and tracing" * tag 'trace-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (57 commits) ftrace: Add warning if tramp hash does not match nr_trampolines ftrace: Fix trampoline hash update check on rec->flags ring-buffer: Use rb_page_size() instead of open coded head_page size ftrace: Rename ftrace_ops field from trampolines to nr_trampolines tracing: Convert local function_graph functions to static ftrace: Do not copy old hash when resetting tracing: let user specify tracing_thresh after selecting function_graph ring-buffer: Always run per-cpu ring buffer resize with schedule_work_on() tracing: Remove function_trace_stop and HAVE_FUNCTION_TRACE_MCOUNT_TEST s390/ftrace: remove check of obsolete variable function_trace_stop arm64, ftrace: Remove check of obsolete variable function_trace_stop Blackfin: ftrace: Remove check of obsolete variable function_trace_stop metag: ftrace: Remove check of obsolete variable function_trace_stop microblaze: ftrace: Remove check of obsolete variable function_trace_stop MIPS: ftrace: Remove check of obsolete variable function_trace_stop parisc: ftrace: Remove check of obsolete variable function_trace_stop sh: ftrace: Remove check of obsolete variable function_trace_stop sparc64,ftrace: Remove check of obsolete variable function_trace_stop tile: ftrace: Remove check of obsolete variable function_trace_stop ftrace: x86: Remove check of obsolete variable function_trace_stop ...
2014-08-03net: filter: split 'struct sk_filter' into socket and bpf partsAlexei Starovoitov1-4/+4
clean up names related to socket filtering and bpf in the following way: - everything that deals with sockets keeps 'sk_*' prefix - everything that is pure BPF is changed to 'bpf_*' prefix split 'struct sk_filter' into struct sk_filter { atomic_t refcnt; struct rcu_head rcu; struct bpf_prog *prog; }; and struct bpf_prog { u32 jited:1, len:31; struct sock_fprog_kern *orig_prog; unsigned int (*bpf_func)(const struct sk_buff *skb, const struct bpf_insn *filter); union { struct sock_filter insns[0]; struct bpf_insn insnsi[0]; struct work_struct work; }; }; so that 'struct bpf_prog' can be used independent of sockets and cleans up 'unattached' bpf use cases split SK_RUN_FILTER macro into: SK_RUN_FILTER to be used with 'struct sk_filter *' and BPF_PROG_RUN to be used with 'struct bpf_prog *' __sk_filter_release(struct sk_filter *) gains __bpf_prog_release(struct bpf_prog *) helper function also perform related renames for the functions that work with 'struct bpf_prog *', since they're on the same lines: sk_filter_size -> bpf_prog_size sk_filter_select_runtime -> bpf_prog_select_runtime sk_filter_free -> bpf_prog_free sk_unattached_filter_create -> bpf_prog_create sk_unattached_filter_destroy -> bpf_prog_destroy sk_store_orig_filter -> bpf_prog_store_orig_filter sk_release_orig_filter -> bpf_release_orig_filter __sk_migrate_filter -> bpf_migrate_filter __sk_prepare_filter -> bpf_prepare_filter API for attaching classic BPF to a socket stays the same: sk_attach_filter(prog, struct sock *)/sk_detach_filter(struct sock *) and SK_RUN_FILTER(struct sk_filter *, ctx) to execute a program which is used by sockets, tun, af_packet API for 'unattached' BPF programs becomes: bpf_prog_create(struct bpf_prog **)/bpf_prog_destroy(struct bpf_prog *) and BPF_PROG_RUN(struct bpf_prog *, ctx) to execute a program which is used by isdn, ppp, team, seccomp, ptp, xt_bpf, cls_bpf, test_bpf Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-08-02Merge branch '3.16-fixes' into mips-for-linux-nextRalf Baechle15-28/+116
2014-08-02MIPS: jz4740: remove unnecessary null test before debugfs_removeFabian Frederick1-2/+1
Fix checkpatch warning: WARNING: debugfs_remove(NULL) is safe this check is probably not required Signed-off-by: Fabian Frederick <fabf@skynet.be> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7225/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02MIPS: Octeon: remove unnecessary null test before debugfs_remove_recursiveFabian Frederick1-2/+1
Fix checkpatch warning: WARNING: debugfs_remove_recursive(NULL) is safe this check is probably not required Signed-off-by: Fabian Frederick <fabf@skynet.be> Acked-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7224/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02MIPS: ZBOOT: implement stack protector in compressed boot phaseBen Chan1-0/+14
This patch implements the stack protector code in MIPS compressed boot phase based on the same code added to arm in commit 8779657d29c0ebcc0c94ede4df2f497baf1b563f "stackprotector: Introduce CONFIG_CC_STACKPROTECTOR_STRONG" by Kees Cook <keescook@chromium.org> Signed-off-by: Ben Chan <benchan@chromium.org> Cc: Kees Cook <keescook@chromium.org> Cc: Olof Johansson <olofj@chromium.org> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7175/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02MIPS: mipsreg: remove duplicate MIPS_CONF4_FTLBSETS_SHIFTDan Carpenter1-1/+0
The MIPS_CONF4_FTLBSETS_SHIFT define is cut and pasted twice so we can remove the second define. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: John Crispin <blogic@openwrt.org> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Cc: linux-mips@linux-mips.org Cc: kernel-janitors@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7063/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02MIPS: Bonito64: remove a duplicate defineDan Carpenter1-1/+0
BONITO_PCIMEMBASECFG_ADDRMASK was cut and pasted twice so we can delete the second define. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: kernel-janitors@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7062/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02MIPS: Malta: initialise MAARsPaul Burton1-0/+26
Initialise the MAARs such that speculation is enabled for all physical addresses outside of the I/O region. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7333/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02MIPS: Initialise MAARsPaul Burton2-0/+142
Add initialisation for Memory Accessibility Attribute Registers. Generic code cannot know the platform-specific requirements with regards to speculative accesses, so it simply calls a platform_maar_init function which platforms with MAARs are expected to implement by calling the provided write_maar_pair function & returning the number of MAAR pairs used. A weak default implementation will simply use no MAAR pairs. Any present but unused MAAR pairs are then marked invalid, effectively disabling them. The end result of this patch is that MAARs are all marked invalid, until platforms implement the platform_maar_init function. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7331/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02MIPS: detect presence of MAARsPaul Burton3-0/+6
Detect the presence of MAAR using the MRP bit in Config5, and record that presence using a CPU option bit. A cpu_has_maar macro will then allow code to conditionalise upon the presence of MAARs. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7330/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02MIPS: define MAAR register accessors & bitsPaul Burton1-0/+12
Add accessor macros for the Memory Accessibility Attribute Registers (MAARs), the bits contained within the MAARs & the Config5.MRP bit indicating their presence. The only current use of the MAARs is to enable speculative accesses to regions of memory. Besides the potential performance benefits of speculative accesses, they are a requirement for the P5600 core to handle non-128b-aligned MSA vector loads & stores rather than generating an address error. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7329/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02MIPS: mark MSA experimentalPaul Burton1-2/+1
In light of the commit 16f77de82f2d (Revert "MIPS: Save/restore MSA context around signals") the MSA support in the kernel is incomplete. Until the replacement for the former sigcontext changes is agreed upon and in tree, mark MSA experimental & disable it by default. MSA is only implemented by one CPU supported by the kernel, the P5600. The P5600 is a 32 bit core, and thus MSA can only be used when the experimental CONFIG_MIPS_O32_FP64_SUPPORT option is enabled. Therefore MSA is only being used in experimental settings anyway and this change doesn't actually make any difference beyond clarifying the state of MSA support. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7311/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02MIPS: Don't build MSA support unless it can be usedPaul Burton1-0/+1
MSA requires that Status.FR == 1, so for MIPS32 tasks MSA can only be used if CONFIG_MIPS_O32_FP64_SUPPORT is enabled. If it is not & the kernel is 32bit, there's no point including support for MSA. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7310/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02MIPS: consistently clear MSA flags when starting & copying threadsPaul Burton1-0/+3
The TIF_MSA_CTX_LIVE flag (indicating that a task has MSA context which needs to be preserved) was being cleared in start_thread, but the TIF_USEDMSA flag (indicating that a task has used MSA in this timeslice) was not. In copy_thread neither flag was cleared, but both need to be. Without clearing these flags the kernel will proceed to attempt to save MSA context when the task is context switched out, and if the task had not used MSA in the meantime then it will fail because MSA or the FPU are disabled. The end result is typically: do_cpu invoked from kernel context![#1]: CPU: 0 PID: 99 Comm: sh Not tainted 3.16.0-rc4-00025-g6dc9476-dirty #88 task: 8f23dc60 ti: 8f1d8000 task.ti: 8f1d8000 ... Call Trace: [<8010edbc>] resume+0x5c/0x280 [<80481e0c>] __schedule+0x370/0x800 [<80104838>] work_resched+0x8/0x2c Fix by consistently clearing both flags in both functions. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7309/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02MIPS: 16 byte align MSA vector contextPaul Burton1-2/+8
The MSA specification upon first read appears to suggest that it is safe to perform vector loads & stores with arbitrary alignment. However it leaves provision for "address-dependent exceptions"... Align the vector context to a 16 byte boundary to ensure that the kernel cannot cause any such exceptions. Note that the fpu field of struct thread_struct was already at a 16 byte boundary within the struct, the introduction of FPU_ALIGN simply makes the requirement explicit. The only part of this impacting the generated kernel binary is ARCH_MIN_TASKALIGN. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7308/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02MIPS: disable preemption whilst initialising MSAPaul Burton2-7/+11
Preemption must be disabled throughout the process of enabling the FPU, enabling MSA & initialising the vector registers. Without doing so it is possible to lose the FPU or MSA whilst initialising them causing that initialisation to fail. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7307/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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