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2016-11-04MIPS: Fix build of compressed imageMatt Redfearn1-1/+1
Changes introduced to arch/mips/Makefile for the generic kernel resulted in build errors when making a compressed image if platform-y has multiple values, like this: make[2]: *** No rule to make target `alchemy/'. make[1]: *** [vmlinuz] Error 2 make[1]: Target `_all' not remade because of errors. make: *** [sub-make] Error 2 make: Target `_all' not remade because of errors. Fix this by quoting $(platform-y) as it is passed to the Makefile in arch/mips/boot/compressed/Makefile Reported-by: kernelci.org bot <bot@kernelci.org> Link: https://storage.kernelci.org/next/next-20161017/mips-gpr_defconfig/build.log Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Reviewed-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14405/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-11-04MIPS: generic: Fix KASLR for generic kernel.Matt Redfearn1-6/+10
The KASLR code requires that the plat_get_fdt() function return the address of the device tree, and it must be available early in the boot, before prom_init() is called. Move the code determining the address of the device tree into plat_get_fdt, and call that from prom_init(). The fdt pointer will be set up by plat_get_fdt() called from relocate_kernel initially and once the relocated kernel has started, prom_init() will use it again to determine the address in the relocated image. Fixes: eed0eabd12ef ("MIPS: generic: Introduce generic DT-based board support") Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Reviewed-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14415/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-11-04MIPS: KASLR: Fix handling of NULL FDTMatt Redfearn1-1/+1
If platform code returns a NULL pointer to the FDT, initial_boot_params will not get set to a valid pointer and attempting to find the /chosen node in it will cause a NULL pointer dereference and the kernel to crash immediately on startup - with no output to the console. Fix this by checking that initial_boot_params is valid before using it. Fixes: 405bc8fd12f5 ("MIPS: Kernel: Implement KASLR using CONFIG_RELOCATABLE") Cc: stable@vger.kernel.org # 4.7+ Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14414/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-11-04MIPS: Malta: Fixup rebootPaul Burton1-1/+2
Commit 10b6ea0959de ("MIPS: Malta: Use syscon-reboot driver to reboot") converted the Malta board to use the generic syscon-reboot driver to handle reboots, but incorrectly used the value 0x4d rather than 0x42 as the magic to write to the reboot register. I also incorrectly believed that syscon/regmap would default to native endianness, but this isn't the case. Force this by specifying with a native-endian property in the devicetree. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Fixes: 10b6ea0959de ("MIPS: Malta: Use syscon-reboot driver to reboot") Reported-by: Guenter Roeck <linux@roeck-us.net> Cc: linux-mips@linux-mips.org Tested-by: Guenter Roeck <linux@roeck-us.net> Tested-by: Maciej W. Rozycki <macro@imgtec.com> Patchwork: https://patchwork.linux-mips.org/patch/14396/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-11-04MIPS: CPC: Provide default mips_cpc_default_phys_base to ignore CPCPaul Burton1-1/+10
Provide a default implementation of mips_cpc_default_phys_base() which simply returns 0, and adjust mips_cpc_phys_base() to allow for mips_cpc_default_phys_base() returning 0. This allows kernels which include CPC support to be built without platform code & simply ignore the CPC if it wasn't already enabled by the bootloader. This fixes link failures such as the following from generic defconfigs: arch/mips/built-in.o: In function `mips_cpc_phys_base': arch/mips/kernel/mips-cpc.c:47: undefined reference to `mips_cpc_default_phys_base' [ralf@linux-mips.org: changed prototype for coding style compliance.] Signed-off-by: Paul Burton <paul.burton@imgtec.com> Reported-by: kbuild test robot <fengguang.wu@intel.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14401/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-21Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-0/+1
Pull KVM fixes from Radim Krčmář: "ARM: - avoid livelock when walking guest page tables - fix HYP mode static keys without CC_HAVE_ASM_GOTO MIPS: - fix a build error without TRACEPOINTS_ENABLED s390: - reject a malformed userspace configuration x86: - suppress a warning without CONFIG_CPU_FREQ - initialize whole irq_eoi array" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: arm/arm64: KVM: Map the BSS at HYP arm64: KVM: Take S1 walks into account when determining S2 write faults KVM: s390: reject invalid modes for runtime instrumentation kvm: x86: memset whole irq_eoi kvm/x86: Fix unused variable warning in kvm_timer_init() KVM: MIPS: Add missing uaccess.h include
2016-10-19Merge branch 'gup_flag-cleanups'Linus Torvalds2-3/+4
Merge the gup_flags cleanups from Lorenzo Stoakes: "This patch series adjusts functions in the get_user_pages* family such that desired FOLL_* flags are passed as an argument rather than implied by flags. The purpose of this change is to make the use of FOLL_FORCE explicit so it is easier to grep for and clearer to callers that this flag is being used. The use of FOLL_FORCE is an issue as it overrides missing VM_READ/VM_WRITE flags for the VMA whose pages we are reading from/writing to, which can result in surprising behaviour. The patch series came out of the discussion around commit 38e088546522 ("mm: check VMA flags to avoid invalid PROT_NONE NUMA balancing"), which addressed a BUG_ON() being triggered when a page was faulted in with PROT_NONE set but having been overridden by FOLL_FORCE. do_numa_page() was run on the assumption the page _must_ be one marked for NUMA node migration as an actual PROT_NONE page would have been dealt with prior to this code path, however FOLL_FORCE introduced a situation where this assumption did not hold. See https://marc.info/?l=linux-mm&m=147585445805166 for the patch proposal" Additionally, there's a fix for an ancient bug related to FOLL_FORCE and FOLL_WRITE by me. [ This branch was rebased recently to add a few more acked-by's and reviewed-by's ] * gup_flag-cleanups: mm: replace access_process_vm() write parameter with gup_flags mm: replace access_remote_vm() write parameter with gup_flags mm: replace __access_remote_vm() write parameter with gup_flags mm: replace get_user_pages_remote() write/force parameters with gup_flags mm: replace get_user_pages() write/force parameters with gup_flags mm: replace get_vaddr_frames() write/force parameters with gup_flags mm: replace get_user_pages_locked() write/force parameters with gup_flags mm: replace get_user_pages_unlocked() write/force parameters with gup_flags mm: remove write/force parameters from __get_user_pages_unlocked() mm: remove write/force parameters from __get_user_pages_locked() mm: remove gup_flags FOLL_WRITE games from __get_user_pages()
2016-10-19mm: replace access_process_vm() write parameter with gup_flagsLorenzo Stoakes1-2/+3
This removes the 'write' argument from access_process_vm() and replaces it with 'gup_flags' as use of this function previously silently implied FOLL_FORCE, whereas after this patch callers explicitly pass this flag. We make this explicit as use of FOLL_FORCE can result in surprising behaviour (and hence bugs) within the mm subsystem. Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-19KVM: MIPS: Add missing uaccess.h includeJames Hogan1-0/+1
MIPS KVM uses user memory accessors but mips.c doesn't directly include uaccess.h, so include it now. This wasn't too much of a problem before v4.9-rc1 as asm/module.h included asm/uaccess.h, however since commit 29abfbd9cbba ("mips: separate extable.h, switch module.h to it") this is no longer the case. This resulted in build failures when trace points were disabled, as trace/define_trace.h includes trace/trace_events.h only ifdef TRACEPOINTS_ENABLED, which goes on to include asm/uaccess.h via a couple of other headers. Fixes: 29abfbd9cbba ("mips: separate extable.h, switch module.h to it") Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Radim Krčmář" <rkrcmar@redhat.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org
2016-10-18mm: replace get_user_pages_unlocked() write/force parameters with gup_flagsLorenzo Stoakes1-1/+1
This removes the 'write' and 'force' use from get_user_pages_unlocked() and replaces them with 'gup_flags' to make the use of FOLL_FORCE explicit in callers as use of this flag can result in surprising behaviour (and hence bugs) within the mm subsystem. Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com> Reviewed-by: Jan Kara <jack@suse.cz> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-15Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds210-3399/+4748
Pull MIPS updates from Ralf Baechle: "This is the main MIPS pull request for 4.9: MIPS core arch code: - traps: 64bit kernels should read CP0_EBase 64bit - traps: Convert ebase to KSEG0 - c-r4k: Drop bc_wback_inv() from icache flush - c-r4k: Split user/kernel flush_icache_range() - cacheflush: Use __flush_icache_user_range() - uprobes: Flush icache via kernel address - KVM: Use __local_flush_icache_user_range() - c-r4k: Fix flush_icache_range() for EVA - Fix -mabi=64 build of vdso.lds - VDSO: Drop duplicated -I*/-E* aflags - tracing: move insn_has_delay_slot to a shared header - tracing: disable uprobe/kprobe on compact branch instructions - ptrace: Fix regs_return_value for kernel context - Squash lines for simple wrapper functions - Move identification of VP(E) into proc.c from smp-mt.c - Add definitions of SYNC barrierstype values - traps: Ensure full EBase is written - tlb-r4k: If there are wired entries, don't use TLBINVF - Sanitise coherentio semantics - dma-default: Don't check hw_coherentio if device is non-coherent - Support per-device DMA coherence - Adjust MIPS64 CAC_BASE to reflect Config.K0 - Support generating Flattened Image Trees (.itb) - generic: Introduce generic DT-based board support - generic: Convert SEAD-3 to a generic board - Enable hardened usercopy - Don't specify STACKPROTECTOR in defconfigs Octeon: - Delete dead code and files across the platform. - Change to use all memory into use by default. - Rename upper case variables in setup code to lowercase. - Delete legacy hack for broken bootloaders. - Leave maintaining the link state to the actual ethernet/PHY drivers. - Add DTS for D-Link DSR-500N. - Fix PCI interrupt routing on D-Link DSR-500N. Pistachio: - Remove ANDROID_TIMED_OUTPUT from defconfig TX39xx: - Move GPIO setup from .mem_setup() to .arch_init() - Convert to Common Clock Framework TX49xx: - Move GPIO setup from .mem_setup() to .arch_init() - Convert to Common Clock Framework txx9wdt: - Add missing clock (un)prepare calls for CCF BMIPS: - Add PW, GPIO SDHCI and NAND device node names - Support APPENDED_DTB - Add missing bcm97435svmb to DT_NONE - Rename bcm96358nb4ser to bcm6358-neufbox4-sercom - Add DT examples for BCM63268, BCM3368 and BCM6362 - Add support for BCM3368 and BCM6362 PCI - Reduce stack frame usage - Use struct list_head lists - Support for CONFIG_PCI_DOMAINS_GENERIC - Make pcibios_set_cache_line_size an initcall - Inline pcibios_assign_all_busses - Split pci.c into pci.c & pci-legacy.c - Introduce CONFIG_PCI_DRIVERS_LEGACY - Support generic drivers CPC - Convert bare 'unsigned' to 'unsigned int' - Avoid lock when MIPS CM >= 3 is present GIC: - Delete unused file smp-gic.c mt7620: - Delete unnecessary assignment for the field "owner" from PCI BCM63xx: - Let clk_disable() return immediately if clk is NULL pm-cps: - Change FSB workaround to CPU blacklist - Update comments on barrier instructions - Use MIPS standard lightweight ordering barrier - Use MIPS standard completion barrier - Remove selection of sync types - Add MIPSr6 CPU support - Support CM3 changes to Coherence Enable Register SMP: - Wrap call to mips_cpc_lock_other in mips_cm_lock_other - Introduce mechanism for freeing and allocating IPIs cpuidle: - cpuidle-cps: Enable use with MIPSr6 CPUs. SEAD3: - Rewrite to use DT and generic kernel feature. USB: - host: ehci-sead3: Remove SEAD-3 EHCI code FBDEV: - cobalt_lcdfb: Drop SEAD3 support dt-bindings: - Document a binding for simple ASCII LCDs auxdisplay: - img-ascii-lcd: driver for simple ASCII LCD displays irqchip i8259: - i8259: Add domain before mapping parent irq - i8259: Allow platforms to override poll function - i8259: Remove unused i8259A_irq_pending Malta: - Rewrite to use DT of/platform: - Probe "isa" busses by default CM: - Print CM error reports upon bus errors Module: - Migrate exception table users off module.h and onto extable.h - Make various drivers explicitly non-modular: - Audit and remove any unnecessary uses of module.h mailmap: - Canonicalize to Qais' current email address. Documentation: - MIPS supports HAVE_REGS_AND_STACK_ACCESS_API Loongson1C: - Add CPU support for Loongson1C - Add board support - Add defconfig - Add RTC support for Loongson1C board All this except one Documentation fix has sat in linux-next and has survived Imagination's automated build test system" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (127 commits) Documentation: MIPS supports HAVE_REGS_AND_STACK_ACCESS_API MIPS: ptrace: Fix regs_return_value for kernel context MIPS: VDSO: Drop duplicated -I*/-E* aflags MIPS: Fix -mabi=64 build of vdso.lds MIPS: Enable hardened usercopy MIPS: generic: Convert SEAD-3 to a generic board MIPS: generic: Introduce generic DT-based board support MIPS: Support generating Flattened Image Trees (.itb) MIPS: Adjust MIPS64 CAC_BASE to reflect Config.K0 MIPS: Print CM error reports upon bus errors MIPS: Support per-device DMA coherence MIPS: dma-default: Don't check hw_coherentio if device is non-coherent MIPS: Sanitise coherentio semantics MIPS: PCI: Support generic drivers MIPS: PCI: Introduce CONFIG_PCI_DRIVERS_LEGACY MIPS: PCI: Split pci.c into pci.c & pci-legacy.c MIPS: PCI: Inline pcibios_assign_all_busses MIPS: PCI: Make pcibios_set_cache_line_size an initcall MIPS: PCI: Support for CONFIG_PCI_DOMAINS_GENERIC MIPS: PCI: Use struct list_head lists ...
2016-10-14MIPS: Wire up new pkey_{mprotect,alloc,free} syscallsRalf Baechle5-6/+28
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14380/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-12MIPS: ptrace: Fix regs_return_value for kernel contextMarcin Nowakowski1-1/+1
Currently regs_return_value always negates reg[2] if it determines the syscall has failed, but when called in kernel context this check is invalid and may result in returning a wrong value. This fixes errors reported by CONFIG_KPROBES_SANITY_TEST Fixes: d7e7528bcd45 ("Audit: push audit success and retcode into arch ptrace.h") Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org # 3.3+ Patchwork: https://patchwork.linux-mips.org/patch/14381/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-11Merge branch 'work.uaccess2' of ↵Linus Torvalds4-9/+16
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull uaccess.h prepwork from Al Viro: "Preparations to tree-wide switch to use of linux/uaccess.h (which, obviously, will allow to start unifying stuff for real). The last step there, ie PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ `git grep -l "$PATT"|grep -v ^include/linux/uaccess.h` is not taken here - I would prefer to do it once just before or just after -rc1. However, everything should be ready for it" * 'work.uaccess2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: remove a stray reference to asm/uaccess.h in docs sparc64: separate extable_64.h, switch elf_64.h to it score: separate extable.h, switch module.h to it mips: separate extable.h, switch module.h to it x86: separate extable.h, switch sections.h to it remove stray include of asm/uaccess.h from cacheflush.h mn10300: remove a bogus processor.h->uaccess.h include xtensa: split uaccess.h into C and asm sides bonding: quit messing with IOCTL kill __kernel_ds_p off mn10300: finish verify_area() off frv: move HAVE_ARCH_UNMAPPED_AREA to pgtable.h exceptions: detritus removal
2016-10-11treewide: remove redundant #include <linux/kconfig.h>Masahiro Yamada3-3/+0
Kernel source files need not include <linux/kconfig.h> explicitly because the top Makefile forces to include it with: -include $(srctree)/include/linux/kconfig.h This commit removes explicit includes except the following: * arch/s390/include/asm/facilities_src.h * tools/testing/radix-tree/linux/kernel.h These two are used for host programs. Link: http://lkml.kernel.org/r/1473656164-11929-1-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-11mips/panic: replace smp_send_stop() with kdump friendly version in panic pathHidehiro Kawai4-1/+33
Daniel Walker reported problems which happens when crash_kexec_post_notifiers kernel option is enabled (https://lkml.org/lkml/2015/6/24/44). In that case, smp_send_stop() is called before entering kdump routines which assume other CPUs are still online. As the result, kdump routines fail to save other CPUs' registers. Additionally for MIPS OCTEON, it misses to stop the watchdog timer. To fix this problem, call a new kdump friendly function, crash_smp_send_stop(), instead of the smp_send_stop() when crash_kexec_post_notifiers is enabled. crash_smp_send_stop() is a weak function, and it just call smp_send_stop(). Architecture codes should override it so that kdump can work appropriately. This patch provides MIPS version. Fixes: f06e5153f4ae (kernel/panic.c: add "crash_kexec_post_notifiers" option) Link: http://lkml.kernel.org/r/20160810080950.11028.28000.stgit@sysi4-13.yrl.intra.hitachi.co.jp Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Reported-by: Daniel Walker <dwalker@fifo99.com> Cc: Dave Young <dyoung@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Daniel Walker <dwalker@fifo99.com> Cc: Xunlei Pang <xpang@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Toshi Kani <toshi.kani@hpe.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Daney <david.daney@cavium.com> Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: "Steven J. Hill" <steven.hill@cavium.com> Cc: Corey Minyard <cminyard@mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-11MIPS: VDSO: Drop duplicated -I*/-E* aflagsJames Hogan1-2/+0
The aflags-vdso is based on ccflags-vdso, which already contains the -I* and -EL/-EB flags from KBUILD_CFLAGS, but those flags are needlessly added again to aflags-vdso. Drop the duplication. Signed-off-by: James Hogan <james.hogan@imgtec.com> Reported-by: Maciej W. Rozycki <macro@imgtec.com> Reviewed-by: Maciej W. Rozycki <macro@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14369/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-11MIPS: Fix -mabi=64 build of vdso.ldsJames Hogan1-1/+1
The native ABI vDSO linker script vdso.lds is built by preprocessing vdso.lds.S, with the native -mabi flag passed in to get the correct ABI definitions. Unfortunately however certain toolchains choke on -mabi=64 without a corresponding compatible -march flag, for example: cc1: error: ‘-march=mips32r2’ is not compatible with the selected ABI scripts/Makefile.build:338: recipe for target 'arch/mips/vdso/vdso.lds' failed Fix this by including ccflags-vdso in the KBUILD_CPPFLAGS for vdso.lds, which includes the appropriate -march flag. Fixes: ebb5e78cc634 ("MIPS: Initial implementation of a VDSO") Signed-off-by: James Hogan <james.hogan@imgtec.com> Reviewed-by: Maciej W. Rozycki <macro@imgtec.com> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org # 4.4.x- Patchwork: https://patchwork.linux-mips.org/patch/14368/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-10Merge branch 'mm-pkeys-for-linus' of ↵Linus Torvalds1-0/+5
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull protection keys syscall interface from Thomas Gleixner: "This is the final step of Protection Keys support which adds the syscalls so user space can actually allocate keys and protect memory areas with them. Details and usage examples can be found in the documentation. The mm side of this has been acked by Mel" * 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/pkeys: Update documentation x86/mm/pkeys: Do not skip PKRU register if debug registers are not used x86/pkeys: Fix pkeys build breakage for some non-x86 arches x86/pkeys: Add self-tests x86/pkeys: Allow configuration of init_pkru x86/pkeys: Default to a restrictive init PKRU pkeys: Add details of system call use to Documentation/ generic syscalls: Wire up memory protection keys syscalls x86: Wire up protection keys system calls x86/pkeys: Allocation/free syscalls x86/pkeys: Make mprotect_key() mask off additional vm_flags mm: Implement new pkey_mprotect() system call x86/pkeys: Add fault handling for PF_PK page fault bit
2016-10-10MIPS: Enable hardened usercopyPaul Burton2-0/+19
Enable CONFIG_HARDENED_USERCOPY checks for MIPS, calling check_object size in all of copy_{to,from}_user(), __copy_{to,from}_user() & __copy_{to,from}_user_inatomic(). Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Kees Cook <keescook@chromium.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14371/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-07uprobes: remove function declarations from arch/{mips,s390}Marcin Nowakowski1-12/+0
The declarations of arch-specific functions have been moved to a common header in commit 3820b4d2789f ('uprobes: Move function declarations out of arch'), but MIPS and S390 has added them to their own trees later. Remove the unnecessary duplicates. Link: http://lkml.kernel.org/r/1472804384-17830-1-git-send-email-marcin.nowakowski@imgtec.com Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-07nmi_backtrace: generate one-line reports for idle cpusChris Metcalf1-0/+1
When doing an nmi backtrace of many cores, most of which are idle, the output is a little overwhelming and very uninformative. Suppress messages for cpus that are idling when they are interrupted and just emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN". We do this by grouping all the cpuidle code together into a new .cpuidle.text section, and then checking the address of the interrupted PC to see if it lies within that section. This commit suitably tags x86 and tile idle routines, and only adds in the minimal framework for other architectures. Link: http://lkml.kernel.org/r/1472487169-14923-5-git-send-email-cmetcalf@mellanox.com Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Daniel Thompson <daniel.thompson@linaro.org> [arm] Tested-by: Petr Mladek <pmladek@suse.com> Cc: Aaron Tomlin <atomlin@redhat.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Russell King <linux@arm.linux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-07nmi_backtrace: add more trigger_*_cpu_backtrace() methodsChris Metcalf2-4/+12
Patch series "improvements to the nmi_backtrace code" v9. This patch series modifies the trigger_xxx_backtrace() NMI-based remote backtracing code to make it more flexible, and makes a few small improvements along the way. The motivation comes from the task isolation code, where there are scenarios where we want to be able to diagnose a case where some cpu is about to interrupt a task-isolated cpu. It can be helpful to see both where the interrupting cpu is, and also an approximation of where the cpu that is being interrupted is. The nmi_backtrace framework allows us to discover the stack of the interrupted cpu. I've tested that the change works as desired on tile, and build-tested x86, arm, mips, and sparc64. For x86 I confirmed that the generic cpuidle stuff as well as the architecture-specific routines are in the new cpuidle section. For arm, mips, and sparc I just build-tested it and made sure the generic cpuidle routines were in the new cpuidle section, but I didn't attempt to figure out which the platform-specific idle routines might be. That might be more usefully done by someone with platform experience in follow-up patches. This patch (of 4): Currently you can only request a backtrace of either all cpus, or all cpus but yourself. It can also be helpful to request a remote backtrace of a single cpu, and since we want that, the logical extension is to support a cpumask as the underlying primitive. This change modifies the existing lib/nmi_backtrace.c code to take a cpumask as its basic primitive, and modifies the linux/nmi.h code to use the new "cpumask" method instead. The existing clients of nmi_backtrace (arm and x86) are converted to using the new cpumask approach in this change. The other users of the backtracing API (sparc64 and mips) are converted to use the cpumask approach rather than the all/allbutself approach. The mips code ignored the "include_self" boolean but with this change it will now also dump a local backtrace if requested. Link: http://lkml.kernel.org/r/1472487169-14923-2-git-send-email-cmetcalf@mellanox.com Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com> Tested-by: Daniel Thompson <daniel.thompson@linaro.org> [arm] Reviewed-by: Aaron Tomlin <atomlin@redhat.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Russell King <linux@arm.linux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-07atomic64: no need for CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVEVineet Gupta1-1/+0
This came to light when implementing native 64-bit atomics for ARCv2. The atomic64 self-test code uses CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE to check whether atomic64_dec_if_positive() is available. It seems it was needed when not every arch defined it. However as of current code the Kconfig option seems needless - for CONFIG_GENERIC_ATOMIC64 it is auto-enabled in lib/Kconfig and a generic definition of API is present lib/atomic64.c - arches with native 64-bit atomics select it in arch/*/Kconfig and define the API in their headers So I see no point in keeping the Kconfig option Compile tested for: - blackfin (CONFIG_GENERIC_ATOMIC64) - x86 (!CONFIG_GENERIC_ATOMIC64) - ia64 Link: http://lkml.kernel.org/r/1473703083-8625-3-git-send-email-vgupta@synopsys.com Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Ming Lin <ming.l@ssi.samsung.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Borislav Petkov <bp@suse.de> Cc: Andi Kleen <ak@linux.intel.com> Cc: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-07mm: move phys_mem_access_prot_allowed() declaration to pgtable.hBaoyou Xie1-2/+0
We get 1 warning when building kernel with W=1: drivers/char/mem.c:220:12: warning: no previous prototype for 'phys_mem_access_prot_allowed' [-Wmissing-prototypes] int __weak phys_mem_access_prot_allowed(struct file *file, In fact, its declaration is spreading to several header files in different architecture, but need to be declare in common header file. So this patch moves phys_mem_access_prot_allowed() to pgtable.h. Link: http://lkml.kernel.org/r/1473751597-12139-1-git-send-email-baoyou.xie@linaro.org Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-06Merge tag 'kvm-4.9-1' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds5-39/+176
Pull KVM updates from Radim Krčmář: "All architectures: - move `make kvmconfig` stubs from x86 - use 64 bits for debugfs stats ARM: - Important fixes for not using an in-kernel irqchip - handle SError exceptions and present them to guests if appropriate - proxying of GICV access at EL2 if guest mappings are unsafe - GICv3 on AArch32 on ARMv8 - preparations for GICv3 save/restore, including ABI docs - cleanups and a bit of optimizations MIPS: - A couple of fixes in preparation for supporting MIPS EVA host kernels - MIPS SMP host & TLB invalidation fixes PPC: - Fix the bug which caused guests to falsely report lockups - other minor fixes - a small optimization s390: - Lazy enablement of runtime instrumentation - up to 255 CPUs for nested guests - rework of machine check deliver - cleanups and fixes x86: - IOMMU part of AMD's AVIC for vmexit-less interrupt delivery - Hyper-V TSC page - per-vcpu tsc_offset in debugfs - accelerated INS/OUTS in nVMX - cleanups and fixes" * tag 'kvm-4.9-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (140 commits) KVM: MIPS: Drop dubious EntryHi optimisation KVM: MIPS: Invalidate TLB by regenerating ASIDs KVM: MIPS: Split kernel/user ASID regeneration KVM: MIPS: Drop other CPU ASIDs on guest MMU changes KVM: arm/arm64: vgic: Don't flush/sync without a working vgic KVM: arm64: Require in-kernel irqchip for PMU support KVM: PPC: Book3s PR: Allow access to unprivileged MMCR2 register KVM: PPC: Book3S PR: Support 64kB page size on POWER8E and POWER8NVL KVM: PPC: Book3S: Remove duplicate setting of the B field in tlbie KVM: PPC: BookE: Fix a sanity check KVM: PPC: Book3S HV: Take out virtual core piggybacking code KVM: PPC: Book3S: Treat VTB as a per-subcore register, not per-thread ARM: gic-v3: Work around definition of gic_write_bpr1 KVM: nVMX: Fix the NMI IDT-vectoring handling KVM: VMX: Enable MSR-BASED TPR shadow even if APICv is inactive KVM: nVMX: Fix reload apic access page warning kvmconfig: add virtio-gpu to config fragment config: move x86 kvm_guest.config to a common location arm64: KVM: Remove duplicating init code for setting VMID ARM: KVM: Support vgic-v3 ...
2016-10-06MIPS: generic: Convert SEAD-3 to a generic boardPaul Burton22-730/+152
Convert the MIPS SEAD-3 board support to be a generic board, supported by generic kernels. Because the SEAD-3 boot protocol was defined long ago and we don't want to force a switch to the UHI protocol, SEAD-3 is added as a legacy board which is detected by reading the REVISION register. This may technically not be a valid memory read & future work will include attempting to handle that gracefully. In practice since SEAD-3 is the only legacy board supported by the generic kernel so far the read will only happen on SEAD-3 boards, and even once Malta is converted the same REVISION register exists there too. Other boards such as Boston, Ci20 & Ci40 will use the UHI boot protocol & thus not run any of the legacy board detect functions. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14354/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: generic: Introduce generic DT-based board supportPaul Burton22-1/+643
Introduce a "generic" platform, which aims to be board-agnostic by making use of device trees passed by the boot protocol defined in the MIPS UHI (Universal Hosting Interface) specification. Provision is made for supporting boards which use a legacy boot protocol that can't be changed, but adding support for such boards or any others is left to followon patches. Right now the built kernels expect to be loaded to 0x80100000, ie. in kseg0. This is fine for the vast majority of MIPS platforms, but nevertheless it would be good to remove this limitation in the future by mapping the kernel via the TLB such that it can be loaded anywhere & map itself appropriately. Configuration is handled by dynamically generating configs using scripts/kconfig/merge_config.sh, somewhat similar to the way powerpc makes use of it. This allows for variations upon the configuration, eg. differing architecture revisions or subsets of driver support for differing boards, to be handled without having a large number of defconfig files. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14353/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Support generating Flattened Image Trees (.itb)Paul Burton2-1/+64
Add support for generating kernel images in the Flattened Image Tree (.itb) format as supported by U-Boot. This format is essentially a Flattened Device Tree binary containing images (kernels, DTBs, ramdisks) and configurations which link those images together. The big advantages of FIT images over the uImage format are: - We can include FDTs in the kernel image in a way that the bootloader can extract it & manipulate it before providing it to the kernel. Thus we can ship FDTs as part of the kernel giving us the advantages of being able to develop & maintain the DT within the kernel tree, but also have the benefits of the bootloader being able to manipulate the FDT. Example uses for this would be to inject the kernel command line into the chosen node, or to fill in the correct memory size. - We can include multiple configurations in a single kernel image. This means that a single FIT image can, given appropriate bootloaders, be booted on different boards with the bootloader selecting an appropriate configuration & providing the correct FDT to the kernel. - We can support a multitude of hashes over the data. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14352/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Adjust MIPS64 CAC_BASE to reflect Config.K0Paul Burton3-7/+5
On MIPS64 we define the default CAC_BASE as one of the xkphys regions of the virtual address space. Since the CCA is encoded in bits 61:59 of xkphys addresses, fixing CAC_BASE to any particular one prevents us from dynamically changing the CCA as we do for MIPS32 where CAC_BASE is placed within kseg0. In order to make the kernel more generic, drop the current kludge that gives CAC_BASE CCA=3 if CONFIG_DMA_NONCOHERENT is selected (disregarding CONFIG_DMA_MAYBE_COHERENT) & CCA=5 (which is not standardised by the architecture) otherwise. Instead read Config.K0 and generate the appropriate offset into xkphys, presuming that either the bootloader or early kernel code will have configured Config.K0 appropriately. This seems like the best option for a generic implementation. The ip27 spaces.h is adjusted to set its former value of CAC_BASE, since it's the only user of CAC_BASE from assembly (in its smp_slave_setup macro). This allows the generic case to focus solely on C code without breaking ip27. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14351/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Print CM error reports upon bus errorsPaul Burton3-21/+3
If a bus error occurs on a system with a MIPS Coherence Manager (CM) then the CM may hold useful diagnostic information. Printing this out has so far been left up to boards, with the requirement that they register a board_be_handler function & call mips_cm_error_decode() from there. In order to avoid boards other than Malta needing to duplicate this code, call mips_cm_error_decode() automatically if the board registers no board_be_handler, and remove the Malta implementation of that. This patch results in no functional change, but removes a further piece of platform-specific code. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14350/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Support per-device DMA coherencePaul Burton7-2/+31
On some MIPS systems, a subset of devices may have DMA coherent with CPU caches. For example in systems including a MIPS I/O Coherence Unit (IOCU), some devices may be connected to that IOCU whilst others are not. Prior to this patch, we have a plat_device_is_coherent() function but no implementation which does anything besides return a global true or false, optionally chosen at runtime. For devices such as those described above this is insufficient. Fix this by tracking DMA coherence on a per-device basis with a dma_coherent field in struct dev_archdata. Setting this from arch_setup_dma_ops() takes care of devices which set the dma-coherent property via device tree, and any PCI devices beneath a bridge described in DT, automatically. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14349/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: dma-default: Don't check hw_coherentio if device is non-coherentPaul Burton1-4/+3
There are no cases where plat_device_is_coherent() will return zero whilst hw_coherentio is non-zero, and acting any differently in such a case doesn't make much sense - if a device is non-coherent with the CPU caches then access to memory "coherent" with DMA must be uncached. Clean up the nonsensical case. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14348/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Sanitise coherentio semanticsPaul Burton7-14/+31
The coherentio variable has previously been used as a boolean value, indicating whether the user specified that coherent I/O should be enabled or disabled. It failed to take into account the case where the user does not specify any preference, in which case it makes sense that we should default to coherent I/O if the hardware supports it (hw_coherentio is non-zero). Introduce an enum to clarify the 3 different values of coherentio & use it throughout the code, modifying plat_device_is_coherent() & r4k_cache_init() to take into account the default case. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Paul Burton <paul.burton@imgtec.com> Patchwork: https://patchwork.linux-mips.org/patch/14347/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: PCI: Support generic driversPaul Burton3-0/+54
Introduce support for PCI drivers using only functionality provided generically by the PCI subsystem, by adding the minimum arch-provided functions required. The driver this has been developed for & tested with the xilinx-pcie on a MIPS Boston development board. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14346/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: PCI: Introduce CONFIG_PCI_DRIVERS_LEGACYPaul Burton4-25/+43
Introduce 2 Kconfig symbols, CONFIG_PCI_DRIVERS_GENERIC & CONFIG_PCI_DRIVERS_LEGACY, which indicate whether the system should be built to for PCI drivers using the MIPS-specific struct pci_controller API (hereafter "legacy" drivers) or more generic drivers using only functionality provided by the PCI core (hereafter "generic" drivers). The Kconfig entries are created such that platforms have to select CONFIG_PCI_DRIVERS_GENERIC if they wish to use it - that is, the default is CONFIG_PCI_DRIVERS_LEGACY so that existing platforms need no modification. The functions declared in pci.h are rearranged with those provided only by pci-legacy.c being guarded by an #ifdef CONFIG_PCI_DRIVERS_LEGACY to ensure they are only used in configurations where they are implemented. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14345/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: PCI: Split pci.c into pci.c & pci-legacy.cPaul Burton3-284/+306
Split out the parts of pci.c that are used by existing systems with MIPS-style PCI drivers but that will not be used by systems with more generic PCI drivers such as pcie-xilinx. This is done in preparation for allowing configurations where the code moved to pci-legacy.c is not built. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Paul Burton <paul.burton@imgtec.com> Patchwork: https://patchwork.linux-mips.org/patch/14344/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: PCI: Inline pcibios_assign_all_bussesPaul Burton2-7/+4
The MIPS implementation of pcibios_assign_all_busses trivially returns 1. Implement it as a static function in asm/pci.h such that the compiler can inline it & optimise out never-taken paths. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14343/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: PCI: Make pcibios_set_cache_line_size an initcallPaul Burton1-3/+3
In preparation for allowing configurations in which pcibios_init is not included, make pcibios_set_cache_line_size an initcall. arch_initcall is used such that it runs before the pcibios_init subsys_initcall for platforms that continue to use it. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14342/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: PCI: Support for CONFIG_PCI_DOMAINS_GENERICPaul Burton3-3/+25
Introduce support for CONFIG_PCI_DOMAINS_GENERIC, allowing for platforms to make use of generic PCI domains instead of the MIPS-specific implementation. The set_pci_need_domain_info function is introduced to abstract away the removed need_domain_info field in struct pci_controller, and pcibios_scanbus is adjusted to use the pci_domain_nr accessor instead of directly accessing the index field. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14341/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: PCI: Use struct list_head listsPaul Burton2-6/+6
Rather than open-coding a linked list implementation, make use of the one in linux/list.h. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14340/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: tracing: disable uprobe/kprobe on compact branch instructionsMarcin Nowakowski4-0/+48
Current instruction decoder for uprobe/kprobe handler only handles branches with delay slots. For compact branches the behaviour is rather unpredictable - and depending on the encoding of a compact branch instruction may result in one (or more) of: - executing an instruction that follows a branch which wasn't in a delay slot and shouldn't have been executed - incorrectly emulating a branch leading to a jump to a wrong location - unexpected branching out of the single-stepped code and never reaching the breakpoint that should terminate the probe handler Results of these actions are generally unpredictable, but can end up with a probed application or kernel crash, so disable placing probes on compact branches until they are handled properly. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14336/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: tracing: move insn_has_delay_slot to a shared headerMarcin Nowakowski3-120/+87
Currently both kprobes and uprobes code have definitions of the insn_has_delay_slot method. Move it to a separate header as an inline method that each probe-specific method can later use. No functional change intended, although the methods slightly varied in the constraints they set for the methods - the uprobes one was chosen as it is slightly more specific when filtering opcode fields. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14335/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: BMIPS: Support APPENDED_DTBJaedon Shin1-0/+8
Use appended DTB when available. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14337/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: BMIPS: Use interrupt-controller node nameJaedon Shin8-38/+38
Changes node names of the interrupt-controller device nodes to interrupt-controller instead of label strings. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Jonas Gorski <jonas.gorski@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: MIPS Mailing List <linux-mips@linux-mips.org> Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14004/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: BMIPS: Add support NAND device nodesJaedon Shin13-0/+195
Adds NAND device nodes to BCM7xxx MIPS based SoCs. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Jonas Gorski <jonas.gorski@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: MIPS Mailing List <linux-mips@linux-mips.org> Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14003/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: BMIPS: Add support SDHCI device nodesJaedon Shin10-0/+92
Adds SDHCI device nodes to BCM7xxx MIPS based SoCs. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Jonas Gorski <jonas.gorski@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: MIPS Mailing List <linux-mips@linux-mips.org> Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14002/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: BMIPS: Add support GPIO device nodesJaedon Shin8-0/+246
Adds GPIO device nodes to BCM7xxx MIPS based SoCs. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Jonas Gorski <jonas.gorski@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: MIPS Mailing List <linux-mips@linux-mips.org> Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14001/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: BMIPS: Add support PWM device nodesJaedon Shin16-0/+204
Adds PWM device nodes to BCM7xxx MIPS based SoCs. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Jonas Gorski <jonas.gorski@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: MIPS Mailing List <linux-mips@linux-mips.org> Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14000/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Malta: Remove custom halt implementationPaul Burton1-6/+0
The arch code will hang the machine with an infinite loop if the board doesn't provide an impelementation of halt - let it, rather than duplicating it. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14280/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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