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2015-01-29vm: add VM_FAULT_SIGSEGV handling supportLinus Torvalds1-0/+2
The core VM already knows about VM_FAULT_SIGBUS, but cannot return a "you should SIGSEGV" error, because the SIGSEGV case was generally handled by the caller - usually the architecture fault handler. That results in lots of duplication - all the architecture fault handlers end up doing very similar "look up vma, check permissions, do retries etc" - but it generally works. However, there are cases where the VM actually wants to SIGSEGV, and applications _expect_ SIGSEGV. In particular, when accessing the stack guard page, libsigsegv expects a SIGSEGV. And it usually got one, because the stack growth is handled by that duplicated architecture fault handler. However, when the generic VM layer started propagating the error return from the stack expansion in commit fee7e49d4514 ("mm: propagate error from stack expansion even for guard page"), that now exposed the existing VM_FAULT_SIGBUS result to user space. And user space really expected SIGSEGV, not SIGBUS. To fix that case, we need to add a VM_FAULT_SIGSEGV, and teach all those duplicate architecture fault handlers about it. They all already have the code to handle SIGSEGV, so it's about just tying that new return value to the existing code, but it's all a bit annoying. This is the mindless minimal patch to do this. A more extensive patch would be to try to gather up the mostly shared fault handling logic into one generic helper routine, and long-term we really should do that cleanup. Just from this patch, you can generally see that most architectures just copied (directly or indirectly) the old x86 way of doing things, but in the meantime that original x86 model has been improved to hold the VM semaphore for shorter times etc and to handle VM_FAULT_RETRY and other "newer" things, so it would be a good idea to bring all those improvements to the generic case and teach other architectures about them too. Reported-and-tested-by: Takashi Iwai <tiwai@suse.de> Tested-by: Jan Engelhardt <jengelh@inai.de> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> # "s390 still compiles and boots" Cc: linux-arch@vger.kernel.org Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-12-16Merge tag 'xtensa-next-20141215' of git://github.com/czankel/xtensa-linuxLinus Torvalds41-3042/+149
Pull Xtensa fixes from Chris Zankel: - fix nommu support - remove s6000 variant and s6105 platform - fix permissions for kmapped pages so that copy_to_user_page works with them - add power management menu to Kconfig to allow use of runtime PM - disable linker optimizations because of a linker bug - fix sparse error * tag 'xtensa-next-20141215' of git://github.com/czankel/xtensa-linux: xtensa: disable link optimization xtensa/uaccess: fix sparse errors xtensa: fix kmap_prot definition xtensa: add power management menu to Kconfig xtensa: remove s6000 variant and s6105 platform xtensa: make PLATFORM_DEFAULT_MEM parameters configurable xtensa: nommu: clean up memory map dump xtensa: nommu: reserve memory below PLATFORM_DEFAULT_MEM_START xtensa: nommu: set up cache and atomctl in initialize_mmu xtensa: move vecbase SR initialization to _startup xtensa: nommu: fix uImage load address xtensa: nommu: fix load address definitions xtensa: nommu: fix Image.elf reset code and ld script xtensa: nommu: add MMU dependency to DEBUG_TLB_SANITY xtensa: nommu: don't build most of the cache flushing code xtensa: nommu: don't provide arch_get_unmapped_area xtensa: nommu: provide MAP_UNINITIALIZED definition xtensa: nommu: provide _PAGE_CHG_MASK definition xtensa: nommu: provide __invalidate_dcache_page_alias stub xtensa: nommu: move init_mmu stub to nommu_context.h
2014-12-15xtensa: disable link optimizationChris Zankel2-1/+2
The default linker behavior is to optimize identical literal values and remove unnecessary overhead. However, because of a bug in the linker, this currently results in an error ('call target out of range'). Disable link-time optimizations per default until there is a fix for the linker and add the option to iss_defconfig. Signed-off-by: Chris Zankel <chris@zankel.net>
2014-12-15xtensa/uaccess: fix sparse errorsMichael S. Tsirkin1-2/+2
virtio wants to read bitwise types from userspace using get_user. At the moment this triggers sparse errors, since the value is passed through an integer. Fix that up using __force. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-12-15Merge tag 'xtensa-for-next-20141213' of ↵Chris Zankel2-1/+7
git://github.com/jcmvbkbc/linux-xtensa into for_next Xtensa improvements for 3.19: - fix permissions for kmapped pages so that copy_to_user_page works with them; - add power management menu to Kconfig to allow use of runtime PM.
2014-12-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds2-1/+5
Pull networking updates from David Miller: 1) New offloading infrastructure and example 'rocker' driver for offloading of switching and routing to hardware. This work was done by a large group of dedicated individuals, not limited to: Scott Feldman, Jiri Pirko, Thomas Graf, John Fastabend, Jamal Hadi Salim, Andy Gospodarek, Florian Fainelli, Roopa Prabhu 2) Start making the networking operate on IOV iterators instead of modifying iov objects in-situ during transfers. Thanks to Al Viro and Herbert Xu. 3) A set of new netlink interfaces for the TIPC stack, from Richard Alpe. 4) Remove unnecessary looping during ipv6 routing lookups, from Martin KaFai Lau. 5) Add PAUSE frame generation support to gianfar driver, from Matei Pavaluca. 6) Allow for larger reordering levels in TCP, which are easily achievable in the real world right now, from Eric Dumazet. 7) Add a variable of napi_schedule that doesn't need to disable cpu interrupts, from Eric Dumazet. 8) Use a doubly linked list to optimize neigh_parms_release(), from Nicolas Dichtel. 9) Various enhancements to the kernel BPF verifier, and allow eBPF programs to actually be attached to sockets. From Alexei Starovoitov. 10) Support TSO/LSO in sunvnet driver, from David L Stevens. 11) Allow controlling ECN usage via routing metrics, from Florian Westphal. 12) Remote checksum offload, from Tom Herbert. 13) Add split-header receive, BQL, and xmit_more support to amd-xgbe driver, from Thomas Lendacky. 14) Add MPLS support to openvswitch, from Simon Horman. 15) Support wildcard tunnel endpoints in ipv6 tunnels, from Steffen Klassert. 16) Do gro flushes on a per-device basis using a timer, from Eric Dumazet. This tries to resolve the conflicting goals between the desired handling of bulk vs. RPC-like traffic. 17) Allow userspace to ask for the CPU upon what a packet was received/steered, via SO_INCOMING_CPU. From Eric Dumazet. 18) Limit GSO packets to half the current congestion window, from Eric Dumazet. 19) Add a generic helper so that all drivers set their RSS keys in a consistent way, from Eric Dumazet. 20) Add xmit_more support to enic driver, from Govindarajulu Varadarajan. 21) Add VLAN packet scheduler action, from Jiri Pirko. 22) Support configurable RSS hash functions via ethtool, from Eyal Perry. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1820 commits) Fix race condition between vxlan_sock_add and vxlan_sock_release net/macb: fix compilation warning for print_hex_dump() called with skb->mac_header net/mlx4: Add support for A0 steering net/mlx4: Refactor QUERY_PORT net/mlx4_core: Add explicit error message when rule doesn't meet configuration net/mlx4: Add A0 hybrid steering net/mlx4: Add mlx4_bitmap zone allocator net/mlx4: Add a check if there are too many reserved QPs net/mlx4: Change QP allocation scheme net/mlx4_core: Use tasklet for user-space CQ completion events net/mlx4_core: Mask out host side virtualization features for guests net/mlx4_en: Set csum level for encapsulated packets be2net: Export tunnel offloads only when a VxLAN tunnel is created gianfar: Fix dma check map error when DMA_API_DEBUG is enabled cxgb4/csiostor: Don't use MASTER_MUST for fw_hello call net: fec: only enable mdio interrupt before phy device link up net: fec: clear all interrupt events to support i.MX6SX net: fec: reset fep link status in suspend function net: sock: fix access via invalid file descriptor net: introduce helper macro for_each_cmsghdr ...
2014-12-10net, lib: kill arch_fast_hash library bitsDaniel Borkmann1-1/+0
As there are now no remaining users of arch_fast_hash(), lets kill it entirely. This basically reverts commit 71ae8aac3e19 ("lib: introduce arch optimized hash library") and follow-up work, that is f.e., commit 237217546d44 ("lib: hash: follow-up fixups for arch hash"), commit e3fec2f74f7f ("lib: Add missing arch generic-y entries for asm-generic/hash.h") and last but not least commit 6a02652df511 ("perf tools: Fix include for non x86 architectures"). Cc: Francesco Fusco <fusco@ntop.org> Cc: Thomas Graf <tgraf@suug.ch> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-09Merge tag 'asm-generic-for-linus' of ↵Linus Torvalds1-7/+0
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic asm/io.h rewrite from Arnd Bergmann: "While there normally is no reason to have a pull request for asm-generic but have all changes get merged through whichever tree needs them, I do have a series for 3.19. There are two sets of patches that change significant portions of asm/io.h, and this branch contains both in order to resolve the conflicts: - Will Deacon has done a set of patches to ensure that all architectures define {read,write}{b,w,l,q}_relaxed() functions or get them by including asm-generic/io.h. These functions are commonly used on ARM specific drivers to avoid expensive L2 cache synchronization implied by the normal {read,write}{b,w,l,q}, but we need to define them on all architectures in order to share the drivers across architectures and to enable CONFIG_COMPILE_TEST configurations for them - Thierry Reding has done an unrelated set of patches that extends the asm-generic/io.h file to the degree necessary to make it useful on ARM64 and potentially other architectures" * tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (29 commits) ARM64: use GENERIC_PCI_IOMAP sparc: io: remove duplicate relaxed accessors on sparc32 ARM: sa11x0: Use void __iomem * in MMIO accessors arm64: Use include/asm-generic/io.h ARM: Use include/asm-generic/io.h asm-generic/io.h: Implement generic {read,write}s*() asm-generic/io.h: Reconcile I/O accessor overrides /dev/mem: Use more consistent data types Change xlate_dev_{kmem,mem}_ptr() prototypes ARM: ixp4xx: Properly override I/O accessors ARM: ixp4xx: Fix build with IXP4XX_INDIRECT_PCI ARM: ebsa110: Properly override I/O accessors ARC: Remove redundant PCI_IOBASE declaration documentation: memory-barriers: clarify relaxed io accessor semantics x86: io: implement dummy relaxed accessor macros for writes tile: io: implement dummy relaxed accessor macros for writes sparc: io: implement dummy relaxed accessor macros for writes powerpc: io: implement dummy relaxed accessor macros for writes parisc: io: implement dummy relaxed accessor macros for writes mn10300: io: implement dummy relaxed accessor macros for writes ...
2014-12-09xtensa: fix kmap_prot definitionMax Filippov1-1/+1
Replace PAGE_KERNEL with PAGE_KERNEL_EXEC to allow copy_to_user_page invalidate icache for pages mapped with kmap. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-12-09xtensa: add power management menu to KconfigMax Filippov1-0/+6
This allows using runtime power management feature on Xtensa. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-12-05net: sock: allow eBPF programs to be attached to socketsAlexei Starovoitov1-0/+3
introduce new setsockopt() command: setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd, sizeof(prog_fd)) where prog_fd was received from syscall bpf(BPF_PROG_LOAD, attr, ...) and attr->prog_type == BPF_PROG_TYPE_SOCKET_FILTER setsockopt() calls bpf_prog_get() which increments refcnt of the program, so it doesn't get unloaded while socket is using the program. The same eBPF program can be attached to multiple sockets. User task exit automatically closes socket which calls sk_filter_uncharge() which decrements refcnt of eBPF program Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller6-4/+296
Conflicts: drivers/net/ethernet/chelsio/cxgb4vf/sge.c drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c sge.c was overlapping two changes, one to use the new __dev_alloc_page() in net-next, and one to use s->fl_pg_order in net. ixgbe_phy.c was a set of overlapping whitespace changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-11net: introduce SO_INCOMING_CPUEric Dumazet1-0/+2
Alternative to RPS/RFS is to use hardware support for multiple queues. Then split a set of million of sockets into worker threads, each one using epoll() to manage events on its own socket pool. Ideally, we want one thread per RX/TX queue/cpu, but we have no way to know after accept() or connect() on which queue/cpu a socket is managed. We normally use one cpu per RX queue (IRQ smp_affinity being properly set), so remembering on socket structure which cpu delivered last packet is enough to solve the problem. After accept(), connect(), or even file descriptor passing around processes, applications can use : int cpu; socklen_t len = sizeof(cpu); getsockopt(fd, SOL_SOCKET, SO_INCOMING_CPU, &cpu, &len); And use this information to put the socket into the right silo for optimal performance, as all networking stack should run on the appropriate cpu, without need to send IPI (RPS/RFS). Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-10Merge tag 'xtensa-for-next-20141021-2' of ↵Chris Zankel39-3038/+138
git://github.com/jcmvbkbc/linux-xtensa into for_next Xtensa improvements for 3.18: - fix nommu support; - remove s6000 variant and s6105 platform.
2014-10-23Merge tag 'xtensa-for-next-20141021-1' of ↵Chris Zankel6-4/+296
git://github.com/jcmvbkbc/linux-xtensa into for_next Xtensa improvements for 3.18: - add seccomp, getrandom, and memfd_create syscalls; - add defconfigs for KC705 and SMP LX200; - fix ISS and xtfpga Kconfig dependencies so that more randconfigs are buildable; - fix umount syscall; - implement pgprot_noncached.
2014-10-21xtensa: remove s6000 variant and s6105 platformDaniel Glöckner22-3006/+0
The Stretch s6000 family support has been merged into mainline 5 years ago. There appear to be no users of this code since nobody complained that there is a merge error preventing compilation. Apart from the s6105 IP camera reference design there are no s6000 devices known to ever have run Linux and as the chips are out of production there probably never will be. The successor s7000 no longer uses an Xtensa core for the OS. Let's remove the code until someone is found who actually needs it. Signed-off-by: Daniel Glöckner <dg@emlix.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: make PLATFORM_DEFAULT_MEM parameters configurableMax Filippov2-2/+38
This allows using xtfpga platform with both MMU and noMMU cores. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: nommu: clean up memory map dumpMax Filippov2-6/+12
noMMU configuration doesn't use special area for vmalloc allocations, don't print it in the memory map. PAGE_OFFSET is fixed to 0 in noMMU, use min_low_pfn and max_low_pfn for lowmem range display. Make all XCHAL_KSEG_* constants unsigned long for consistency with other addresses. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: nommu: reserve memory below PLATFORM_DEFAULT_MEM_STARTMax Filippov1-0/+11
Memory accounting code can't handle pages below PLATFORM_DEFAULT_MEM_START. Reserve those pages if they exist. When PLATFORM_DEFAULT_MEM_START is zero reserve one page at address 0 to make sure that successfull memory allocations don't return NULL. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: nommu: set up cache and atomctl in initialize_mmuMax Filippov2-2/+36
initialize_mmu sets up atomctl SR which is needed for s32c1i to function correctly even in noMMU configurations. It's also a good place to set up caching attributes of physical memory. Allow enabling INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX in noMMU configurations for setting up atomctl and cache attributes. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: move vecbase SR initialization to _startupMax Filippov2-3/+5
Instead of initializing vecbase in initialize_mmu macro, which may be expanded either in Image.elf reset vector hadler or in the kernel head.S, both times only when CONFIG_MMU is enabled, do this initialization once in _startup function. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: nommu: fix uImage load addressMax Filippov1-0/+4
Use the same offset from the default physical memory start address as in LOAD_MEMORY_ADDRESS definition. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: nommu: fix load address definitionsMax Filippov1-3/+4
Change KERNELOFFSET, LOAD_MEMORY_ADDRESS and VIRTUAL_MEMORY_ADDRESS to be relative to the start of physical memory in noMMU configuration, as there's no uniform memory remapping to KSEG starting at 0xd0000000. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: nommu: fix Image.elf reset code and ld scriptMax Filippov2-6/+6
Don't hardcode kernel entry address as 0x3000 or 0xd0003000, use LOAD_MEMORY_ADDRESS macro. Don't compile MMU remapping code and don't try to link it when building noMMU configuration. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: nommu: add MMU dependency to DEBUG_TLB_SANITYMax Filippov1-1/+1
TLB sanity checking code depends on full MMU presence and may not be built in noMMU confgiuration. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: nommu: don't build most of the cache flushing codeMax Filippov3-5/+6
Most cache flushing code is only relevant for MMU. Don't build it for nommu configuration. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: nommu: don't provide arch_get_unmapped_areaMax Filippov1-0/+2
Nommu unconditionally provides arch_get_unmapped_area that always returns -ENOMEM. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: nommu: provide MAP_UNINITIALIZED definitionMax Filippov1-0/+6
Add MAP_UNINITIALIZED to xtensa version of mman.h to keep mm/nommu.c happy. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: nommu: provide _PAGE_CHG_MASK definitionMax Filippov1-0/+1
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: nommu: provide __invalidate_dcache_page_alias stubMax Filippov1-0/+2
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: nommu: move init_mmu stub to nommu_context.hMax Filippov2-4/+4
mmu_context.h is not used in nommu configuration, nommu_context.h is used instead. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: xtfpga: add lx200 SMP DTS and defconfigMax Filippov2-0/+151
This config allows running SMP-enabled bitstream on LX200 board. NFS or FLASH rootfs, minimal debug, up to 4 cores. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: xtfpga: add generic KC705 board configMax Filippov1-0/+131
This config enables most important features, NFS or FLASH rootfs and minimal debug. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21xtensa: re-wire umount syscall to sys_oldumountMax Filippov1-1/+2
Userspace actually passes single parameter (path name) to the umount syscall, so new umount just fails. Fix it by requesting old umount syscall implementation and re-wiring umount to it. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-20xtensa: io: remove dummy relaxed accessor macros for readsWill Deacon1-7/+0
These are now defined by asm-generic/io.h, so we don't need the private definitions anymore. Cc: Chris Zankel <chris@zankel.net> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2014-10-19Merge git://git.infradead.org/users/eparis/auditLinus Torvalds1-1/+1
Pull audit updates from Eric Paris: "So this change across a whole bunch of arches really solves one basic problem. We want to audit when seccomp is killing a process. seccomp hooks in before the audit syscall entry code. audit_syscall_entry took as an argument the arch of the given syscall. Since the arch is part of what makes a syscall number meaningful it's an important part of the record, but it isn't available when seccomp shoots the syscall... For most arch's we have a better way to get the arch (syscall_get_arch) So the solution was two fold: Implement syscall_get_arch() everywhere there is audit which didn't have it. Use syscall_get_arch() in the seccomp audit code. Having syscall_get_arch() everywhere meant it was a useless flag on the stack and we could get rid of it for the typical syscall entry. The other changes inside the audit system aren't grand, fixed some records that had invalid spaces. Better locking around the task comm field. Removing some dead functions and structs. Make some things static. Really minor stuff" * git://git.infradead.org/users/eparis/audit: (31 commits) audit: rename audit_log_remove_rule to disambiguate for trees audit: cull redundancy in audit_rule_change audit: WARN if audit_rule_change called illegally audit: put rule existence check in canonical order next: openrisc: Fix build audit: get comm using lock to avoid race in string printing audit: remove open_arg() function that is never used audit: correct AUDIT_GET_FEATURE return message type audit: set nlmsg_len for multicast messages. audit: use union for audit_field values since they are mutually exclusive audit: invalid op= values for rules audit: use atomic_t to simplify audit_serial() kernel/audit.c: use ARRAY_SIZE instead of sizeof/sizeof[0] audit: reduce scope of audit_log_fcaps audit: reduce scope of audit_net_id audit: arm64: Remove the audit arch argument to audit_syscall_entry arm64: audit: Add audit hook in syscall_trace_enter/exit() audit: x86: drop arch from __audit_syscall_entry() interface sparc: implement is_32bit_task sparc: properly conditionalize use of TIF_32BIT ...
2014-10-13Merge branch 'locking-arch-for-linus' of ↵Linus Torvalds1-152/+83
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull arch atomic cleanups from Ingo Molnar: "This is a series kept separate from the main locking tree, which cleans up and improves various details in the atomics type handling: - Remove the unused atomic_or_long() method - Consolidate and compress atomic ops implementations between architectures, to reduce linecount and to make it easier to add new ops. - Rewrite generic atomic support to only require cmpxchg() from an architecture - generate all other methods from that" * 'locking-arch-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits) locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read() locking, mips: Fix atomics locking, sparc64: Fix atomics locking,arch: Rewrite generic atomic support locking,arch,xtensa: Fold atomic_ops locking,arch,sparc: Fold atomic_ops locking,arch,sh: Fold atomic_ops locking,arch,powerpc: Fold atomic_ops locking,arch,parisc: Fold atomic_ops locking,arch,mn10300: Fold atomic_ops locking,arch,mips: Fold atomic_ops locking,arch,metag: Fold atomic_ops locking,arch,m68k: Fold atomic_ops locking,arch,m32r: Fold atomic_ops locking,arch,ia64: Fold atomic_ops locking,arch,hexagon: Fold atomic_ops locking,arch,cris: Fold atomic_ops locking,arch,avr32: Fold atomic_ops locking,arch,arm64: Fold atomic_ops locking,arch,arm: Fold atomic_ops ...
2014-10-09Merge branch 'timers-nohz-for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer fixes from Ingo Molnar: "Main changes: - Fix the deadlock reported by Dave Jones et al - Clean up and fix nohz_full interaction with arch abilities - nohz init code consolidation/cleanup" * 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: nohz: nohz full depends on irq work self IPI support nohz: Consolidate nohz full init code arm64: Tell irq work about self IPI support arm: Tell irq work about self IPI support x86: Tell irq work about self IPI support irq_work: Force raised irq work to run on irq work interrupt irq_work: Introduce arch_irq_work_has_interrupt() nohz: Move nohz full init call to tick init
2014-10-06xtensa: xtfpga: only select ethoc when ethernet is availableMax Filippov1-1/+1
Otherwise we get the following build warning: (XTENSA_PLATFORM_XTFPGA) selects ETHOC which has unmet direct dependencies (NETDEVICES && ETHERNET && HAS_IOMEM && HAS_DMA) Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-06xtensa: add seccomp, getrandom, and memfd_create syscallsMax Filippov1-1/+8
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-06xtensa: ISS: add BLOCK dependency to BLK_DEV_SIMDISKMax Filippov1-1/+1
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-06xtensa: implement pgprot_noncachedMax Filippov1-0/+2
The default pgprot_noncached doesn't do anything. This leads to issues when drivers rely on it to disable caching in userspace mappings. Implement pgprot_noncached properly so that caching of userspace mappings could be controlled. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-03locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read()Pranith Kumar1-1/+1
Use the much more reader friendly ACCESS_ONCE() instead of the cast to volatile. This is purely a stylistic change. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-arch@vger.kernel.org Link: http://lkml.kernel.org/r/1411482607-20948-1-git-send-email-bobby.prani@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-09-23ARCH: AUDIT: audit_syscall_entry() should not require the archEric Paris1-1/+1
We have a function where the arch can be queried, syscall_get_arch(). So rather than have every single piece of arch specific code use and/or duplicate syscall_get_arch(), just have the audit code use the syscall_get_arch() code. Based-on-patch-by: Richard Briggs <rgb@redhat.com> Signed-off-by: Eric Paris <eparis@redhat.com> Cc: linux-alpha@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-ia64@vger.kernel.org Cc: microblaze-uclinux@itee.uq.edu.au Cc: linux-mips@linux-mips.org Cc: linux@lists.openrisc.net Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: user-mode-linux-devel@lists.sourceforge.net Cc: linux-xtensa@linux-xtensa.org Cc: x86@kernel.org
2014-09-13irq_work: Introduce arch_irq_work_has_interrupt()Peter Zijlstra1-0/+1
The nohz full code needs irq work to trigger its own interrupt so that the subsystem can work even when the tick is stopped. Lets introduce arch_irq_work_has_interrupt() that archs can override to tell about their support for this ability. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2014-09-09xtensa/uapi: Add definition of TIOC[SG]RS485Ricardo Ribalda Delgado1-0/+2
Commit: e676253b19b2d269cccf67fdb1592120a0cd0676 [3/21] serial/8250: Add support for RS485 IOCTLs, adds support for RS485 ioctls for 825_core on all the archs. Unfortunaltely the definition of TIOCSRS485 and TIOCGRS485 was missing on the ioctls.h file Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-08-31Merge tag 'xtensa-20140830' of git://github.com/czankel/xtensa-linuxLinus Torvalds24-217/+497
Pull Xtensa updates from Chris Zankel: "Xtensa improvements for 3.17: - support highmem on cores with aliasing data cache. Enable highmem on kc705 by default - simplify addition of new core variants (no need to modify Kconfig / Makefiles) - improve robustness of unaligned access handler and its interaction with window overflow/underflow exception handlers - deprecate atomic and spill registers syscalls - clean up Kconfig: remove orphan MATH_EMULATION, sort 'select' statements - wire up renameat2 syscall. Various fixes: - fix address checks in dma_{alloc,free}_coherent (runtime BUG) - fix access to THREAD_RA/THREAD_SP/THREAD_DS (debug build breakage) - fix TLBTEMP_BASE_2 region handling in fast_second_level_miss (runtime unrecoverable exception) - fix a6 and a7 handling in fast_syscall_xtensa (runtime userspace register clobbering) - fix kernel/user jump out of fast_unaligned (potential runtime unrecoverabl exception) - replace termios IOCTL code definitions with constants (userspace build breakage)" * tag 'xtensa-20140830' of git://github.com/czankel/xtensa-linux: (25 commits) xtensa: deprecate fast_xtensa and fast_spill_registers syscalls xtensa: don't allow overflow/underflow on unaligned stack xtensa: fix a6 and a7 handling in fast_syscall_xtensa xtensa: allow single-stepping through unaligned load/store xtensa: move invalid unaligned instruction handler closer to its users xtensa: make fast_unaligned store restartable xtensa: add double exception fixup handler for fast_unaligned xtensa: fix kernel/user jump out of fast_unaligned xtensa: configure kc705 for highmem xtensa: support highmem in aliasing cache flushing code xtensa: support aliasing cache in kmap xtensa: support aliasing cache in k[un]map_atomic xtensa: implement clear_user_highpage and copy_user_highpage xtensa: fix TLBTEMP_BASE_2 region handling in fast_second_level_miss xtensa: allow fixmap and kmap span more than one page table xtensa: make fixmap region addressing grow with index xtensa: fix access to THREAD_RA/THREAD_SP/THREAD_DS xtensa: add renameat2 syscall xtensa: fix address checks in dma_{alloc,free}_coherent xtensa: replace IOCTL code definitions with constants ...
2014-08-29flush_icache_range: export symbol to fix build errorsPranith Kumar1-0/+1
Fix building errors occuring due to a missing export of flush_icache_range() in kisskb.ellerman.id.au/kisskb/buildresult/11677809/ ERROR: "flush_icache_range" [drivers/misc/lkdtm.ko] undefined! Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Vineet Gupta <vgupta@synopsys.com> [arc] Acked-by: Richard Kuo <rkuo@codeaurora.org> [hexagon] Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Chris Zankel <chris@zankel.net> Acked-by: Max Filippov <jcmvbkbc@gmail.com> [xtensa] Cc: Noam Camus <noamc@ezchip.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Acked-by: Zhigang Lu <zlu@tilera.com> [tile] Cc: Kirill Tkhai <tkhai@yandex.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-08-18Merge tag 'xtensa-for-next-20140815' into for_nextChris Zankel24-217/+497
Xtensa improvements for 3.17: - support highmem on cores with aliasing data cache. Enable highmem on kc705 by default; - simplify addition of new core variants (no need to modify Kconfig / Makefiles); - improve robustness of unaligned access handler and its interaction with window overflow/underflow exception handlers; - deprecate atomic and spill registers syscalls; - clean up Kconfig: remove orphan MATH_EMULATION, sort 'select' statements; - wire up renameat2 syscall. Various fixes: - fix address checks in dma_{alloc,free}_coherent (runtime BUG); - fix access to THREAD_RA/THREAD_SP/THREAD_DS (debug build breakage); - fix TLBTEMP_BASE_2 region handling in fast_second_level_miss (runtime unrecoverable exception); - fix a6 and a7 handling in fast_syscall_xtensa (runtime userspace register clobbering); - fix kernel/user jump out of fast_unaligned (potential runtime unrecoverable exception); - replace termios IOCTL code definitions with constants (userspace build breakage). Signed-off-by: Chris Zankel <chris@zankel.net>
2014-08-14locking,arch,xtensa: Fold atomic_opsPeter Zijlstra1-151/+82
Many of the atomic op implementations are the same except for one instruction; fold the lot into a few CPP macros and reduce LoC. This also prepares for easy addition of new ops. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Chris Zankel <chris@zankel.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: linux-xtensa@linux-xtensa.org Link: http://lkml.kernel.org/r/20140508135852.879575796@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
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