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* nios2: update pt_regsChung-Ling Tang2015-03-12
| | | | | | | Remove struct pt_regs from user header and use generic ucontext.h. Signed-off-by: Chung-Ling Tang <cltang@codesourcery.com> Acked-by: Ley Foon Tan <lftan@altera.com>
* Merge tag 'nios2-v3.20-rc1' of git://git.rocketboards.org/linux-socfpga-nextLinus Torvalds2015-02-17
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull arch/nios2 update from Ley Foon Tan: "Here is the nios2 update for 3.20: - add early printk support - add kgdb support - add compressed kernel support - bugfixes" * tag 'nios2-v3.20-rc1' of git://git.rocketboards.org/linux-socfpga-next: nios2: add kgdb support MAINTAINERS: update arch/nios2 git tree nios2: default CONFIG_NIOS2_BOOT_LINK_OFFSET to 8MB nios2: Add support for compressed kernel nios2: add early printk support nios2: Port OOM changes to do_page_fault() nios2: Remove unused prepare_to_copy()
| * nios2: add kgdb supportLey Foon Tan2015-02-16
| | | | | | | | Signed-off-by: Ley Foon Tan <lftan@altera.com>
| * nios2: default CONFIG_NIOS2_BOOT_LINK_OFFSET to 8MBLey Foon Tan2015-02-10
| | | | | | | | Signed-off-by: Ley Foon Tan <lftan@altera.com>
| * nios2: Add support for compressed kernelLey Foon Tan2015-02-10
| | | | | | | | Signed-off-by: Ley Foon Tan <lftan@altera.com>
| * nios2: add early printk supportLey Foon Tan2015-02-10
| | | | | | | | Signed-off-by: Ley Foon Tan <lftan@altera.com>
| * nios2: Port OOM changes to do_page_fault()Ley Foon Tan2015-02-09
| | | | | | | | | | | | | | | | | | | | | | | | | | Commit d065bd810b6d ("mm: retry page fault when blocking on disk transfer") and and commit 37b23e0525d3 ("x86,mm: make pagefault killable") The above commits introduced changes into the nios2 pagefault handler for making the page fault handler retryable as well as killable. These changes reduce the mmap_sem hold time, which is crucial during OOM killer invocation. Signed-off-by: Ley Foon Tan <lftan@altera.com>
| * nios2: Remove unused prepare_to_copy()Tobias Klauser2015-02-09
| | | | | | | | | | | | | | | | | | prepare_to_copy() was removed from all architectures supported at that time in commit 55ccf3fe3f9a ("fork: move the real prepare_to_copy() users to arch_dup_task_struct()"). Remove it from nios2 as well. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Ley Foon Tan <lftan@altera.com>
* | mm: make FIRST_USER_ADDRESS unsigned long on all archsKirill A. Shutemov2015-02-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | LKP has triggered a compiler warning after my recent patch "mm: account pmd page tables to the process": mm/mmap.c: In function 'exit_mmap': >> mm/mmap.c:2857:2: warning: right shift count >= width of type [enabled by default] The code: > 2857 WARN_ON(mm_nr_pmds(mm) > 2858 round_up(FIRST_USER_ADDRESS, PUD_SIZE) >> PUD_SHIFT); In this, on tile, we have FIRST_USER_ADDRESS defined as 0. round_up() has the same type -- int. PUD_SHIFT. I think the best way to fix it is to define FIRST_USER_ADDRESS as unsigned long. On every arch for consistency. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reported-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | nios2: drop _PAGE_FILE and pte_file()-related helpersKirill A. Shutemov2015-02-10
|/ | | | | | | | | | | We've replaced remap_file_pages(2) implementation with emulation. Nobody creates non-linear mapping anymore. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Ley Foon Tan <lftan@altera.com> Reviewed-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nios2: fix unhandled signalsChung-Ling Tang2015-02-08
| | | | | | | Follow other architectures for user fault handling. Signed-off-by: Chung-Ling Tang <cltang@codesourcery.com> Acked-by: Ley Foon Tan <lftan@altera.com>
* vm: add VM_FAULT_SIGSEGV handling supportLinus Torvalds2015-01-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* Merge tag 'nios2-fixes-v3.19-rc6' of ↵Linus Torvalds2015-01-22
|\ | | | | | | | | | | | | | | | | | | git://git.rocketboards.org/linux-socfpga-next Pull one arch/nios2 fix from Ley Foon Tan: "Fix kuser trampoline address" * tag 'nios2-fixes-v3.19-rc6' of git://git.rocketboards.org/linux-socfpga-next: nios2: fix kuser trampoline address
| * nios2: fix kuser trampoline addressLey Foon Tan2015-01-22
| | | | | | | | | | | | __kuser_sigtramp address should be 0x1044 instead of 0x1040. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* | Merge tag 'fixes-for-linus' of ↵Linus Torvalds2015-01-22
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull module and param fixes from Rusty Russell: "Surprising number of fixes this merge window :( The first two are minor fallout from the param rework which went in this merge window. The next three are a series which fixes a longstanding (but never previously reported and unlikely , so no CC stable) race between kallsyms and freeing the init section. Finally, a minor cleanup as our module refcount will now be -1 during unload" * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: module: make module_refcount() a signed integer. module: fix race in kallsyms resolution during module load success. module: remove mod arg from module_free, rename module_memfree(). module_arch_freeing_init(): new hook for archs before module->module_init freed. param: fix uninitialized read with CONFIG_DEBUG_LOCK_ALLOC param: initialize store function to NULL if not available.
| * module: remove mod arg from module_free, rename module_memfree().Rusty Russell2015-01-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Nothing needs the module pointer any more, and the next patch will call it from RCU, where the module itself might no longer exist. Removing the arg is the safest approach. This just codifies the use of the module_alloc/module_free pattern which ftrace and bpf use. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Alexei Starovoitov <ast@kernel.org> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Ley Foon Tan <lftan@altera.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: x86@kernel.org Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: linux-cris-kernel@axis.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: nios2-dev@lists.rocketboards.org Cc: linuxppc-dev@lists.ozlabs.org Cc: sparclinux@vger.kernel.org Cc: netdev@vger.kernel.org
* | nios2: Use preempt_schedule_irqTobias Klauser2014-12-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Follow aa0d53260596 ("ia64: Use preempt_schedule_irq") and use preempt_schedule_irq instead of enabling/disabling interrupts and messing around with PREEMPT_ACTIVE in the nios2 low-level preemption code ourselves. Also get rid of the now needless re-check for TIF_NEED_RESCHED, preempt_schedule_irq will already take care of rescheduling. This also fixes the following build error when building with CONFIG_PREEMPT: arch/nios2/kernel/built-in.o: In function `need_resched': arch/nios2/kernel/entry.S:374: undefined reference to `PREEMPT_ACTIVE' Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Ley Foon Tan <lftan@altera.com>
* | nios2: Initialize cpuinfo.mmuWalter Goossens2014-12-30
|/ | | | | | | | This patch initializes the mmu field of the cpuinfo structure to the value supplied by the devicetree. Signed-off-by: Walter Goossens <waltergoossens@home.nl> Acked-by: Ley Foon Tan <lftan@altera.com>
* nios2/uaccess: fix sparse errorsLey Foon Tan2014-12-17
| | | | | | | | | | | 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. Suggested-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: enable "make defconfig"Paul Bolle2014-12-17
| | | | | | | | | | | | | | | | | Running "make defconfig" currently fails for nios2: $ make ARCH=nios2 defconfig scripts/kconfig/conf --defconfig Kconfig *** *** Can't find default configuration "arch/nios2/defconfig"! *** make[1]: *** [defconfig] Error 1 make: *** [defconfig] Error 2 Add a definition for KBUILD_DEFCONFIG to the nios2's main Makefile to enable this make target. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Acked-by: Ley Foon Tan <lftan@altera.com>
* nios2: add definition of ioremap_wc to io.hGuenter Roeck2014-12-17
| | | | | | | | | | | | | Fix drivers/gpu/drm/drm_bufs.c: In function 'drm_addmap_core': drivers/gpu/drm/drm_bufs.c:213:5: error: implicit declaration of function 'ioremap_wc' seen when building nios2:allmodconfig. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Ley Foon Tan <lftan@altera.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds2014-12-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 ...
* nios2: Make NIOS2_CMDLINE_IGNORE_DTB depend on CMDLINE_BOOLTobias Klauser2014-12-07
| | | | | | | | | | | | | | | | | | | If NIOS2_CMDLINE_IGNORE_DTB is selected but CMDLINE_BOOL isn't and thus CONFIG_CMDLINE is not defined, the build fails with the following error: arch/nios2/kernel/setup.c: In function 'nios2_boot_init': arch/nios2/kernel/setup.c:131:30: error: 'CONFIG_CMDLINE' undeclared (first use in this function) strncpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); This can be reproduced using randconfig with KCONFIG_SEED=0xE5B8749E, i.e. 'make KCONFIG_SEED=0xE5B8749E ARCH=nios2 randconfig'. Fix this by letting NIOS2_CMDLINE_IGNORE_DTB depend on CMDLINE_BOOL, so we actually have a default kernel command string to fall back to. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Ley Foon Tan <lftan@altera.com>
* nios2: Add missing NR_CPUS to KconfigTobias Klauser2014-12-07
| | | | | | | | | | | | kernel/time/Kconfig expects that NR_CPUS is defined. This fixes the following config warning: "kernel/time/Kconfig:163:warning: range is invalid" Follow 4cbbbb43d666 ("microblaze: Fix missing NR_CPUS in menuconfig") Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Ley Foon Tan <lftan@altera.com>
* nios2: asm-offsets: Remove unused definition TI_TASKTobias Klauser2014-12-07
| | | | | | | TI_TASK is not used in nios2 assembly code, so remove it. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Ley Foon Tan <lftan@altera.com>
* nios2: Remove write-only struct member from nios2_timerTobias Klauser2014-12-07
| | | | | | | | The irq member of struct nios2_timer is only written to but never read, thus it can be removed. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Ley Foon Tan <lftan@altera.com>
* nios2: Remove unused extern declaration of shm_align_maskTobias Klauser2014-12-07
| | | | | | | | shm_align_mask is not defined/used on nios2, thus there is no need to declare it. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Ley Foon Tan <lftan@altera.com>
* nios2: include linux/type.h in io.hLey Foon Tan2014-12-07
| | | | | | This is require for __iomem definition. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: move include asm-generic/io.h to end of fileLey Foon Tan2014-12-07
| | | | | | | | | | Move asm-generic/io.h to end of file to override functions like phys_to_virt, virt_to_phys in asm-generic/io.h. This is due to recent commit 9216efaf introduced new way to override functions by checking for the existence of a macro with the same of the function. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: remove include asm-generic/iomap.h from io.hLey Foon Tan2014-12-07
| | | | | | | Don't need asm-generic/iomap.h and asm-generic/io.h added default ioread8/16/32 iowrite8/16/32 implementation. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: remove unnecessary space before defineLey Foon Tan2014-12-07
| | | | | | Remove extra space between # and define. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: fix error handling of irq_of_parse_and_mapDmitry Torokhov2014-12-07
| | | | | | | | | Return value of irq_of_parse_and_map() is unsigned int, with 0 indicating failure, so testing for negative result never works. Signed-off-by: Dmitry Torokhov <dtor@chromium.org> Reviewed-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Ley Foon Tan <lftan@altera.com>
* nios2: Use IS_ENABLED instead of #ifdefs to check config symbolsTobias Klauser2014-12-07
| | | | | | | | Make the checking for div/mul/mulx instruction config symbols easier to read by using IS_ENABLED instead of #ifdefs. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Ley Foon Tan <lftan@altera.com>
* nios2: Build infrastructureLey Foon Tan2014-12-07
| | | | | | | This patch adds Makefile and Kconfig files required for building a nios2 kernel. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: ptrace supportLey Foon Tan2014-12-07
| | | | | | Add ptrace support for nios2. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: Module supportLey Foon Tan2014-12-07
| | | | | | This patch adds support for loadable modules. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: Nios2 registersLey Foon Tan2014-12-07
| | | | | | | This file contains constants for the instruction macros, cpu registers, fields and bits. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: Miscellaneous header filesLey Foon Tan2014-12-07
| | | | | | This patch introduces a few nios2-specific header files. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: Cpuinfo handlingLey Foon Tan2014-12-07
| | | | Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: Time keepingLey Foon Tan2014-12-07
| | | | | | | Add time keeping code for nios2. Signed-off-by: Ley Foon Tan <lftan@altera.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
* nios2: Device tree supportLey Foon Tan2014-12-07
| | | | | | Add device tree support to arch/nios2. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: Library functionsLey Foon Tan2014-12-07
| | | | | | Add optimised library functions for nios2. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: Signal handling supportLey Foon Tan2014-12-07
| | | | | | This patch adds support for signal handling. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: System calls handlingLey Foon Tan2014-12-07
| | | | | | | | | This patch adds support for system calls from userspaces. It uses the asm-generic/unistd.h definitions with architecture spcific syscall. The sys_call_table is just an array defined in a C file and it contains pointers to the syscall functions. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: ELF definitionsLey Foon Tan2014-12-07
| | | | | | This patch adds definitions for the ELF format Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: DMA mapping APILey Foon Tan2014-12-07
| | | | | | This patch adds support for the DMA mapping API. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: Interrupt handlingLey Foon Tan2014-12-07
| | | | | | | This patch adds the support for IRQ handling. Signed-off-by: Ley Foon Tan <lftan@altera.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
* nios2: TLB handlingLey Foon Tan2014-12-07
| | | | | | This patch adds the TLB maintenance functions. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: Cache handlingLey Foon Tan2014-12-07
| | | | | | This patch adds functionality required for cache maintenance. Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: Process managementLey Foon Tan2014-12-07
| | | | | | This patch adds support for thread creation and context switching. Signed-off-by: Ley Foon Tan <lftan@altera.com>
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