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| | * | arm64: KVM: MMIO access backendMarc Zyngier2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Define the necessary structures to perform an MMIO access. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| | * | arm64: KVM: kvm_arch and kvm_vcpu_arch definitionsMarc Zyngier2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide the architecture dependent structures for VM and vcpu abstractions. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| | * | arm64: KVM: virtual CPU resetMarc Zyngier2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide the reset code for a virtual CPU booted in 64bit mode. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| | * | arm64: KVM: CPU specific system registers handlingMarc Zyngier2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the support code for CPU specific system registers. Not much here yet. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| | * | arm64: KVM: system register handlingMarc Zyngier2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide 64bit system register handling, modeled after the cp15 handling for ARM. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| | * | arm64: KVM: user space interfaceMarc Zyngier2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide the kvm.h file that defines the user space visible interface. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| | * | arm64: KVM: architecture specific MMU backendMarc Zyngier2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Define the arm64 specific MMU backend: - HYP/kernel VA offset - S2 4/64kB definitions - S2 page table populating and flushing - icache cleaning Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| | * | arm64: KVM: fault injection into a guestMarc Zyngier2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement the injection of a fault (undefined, data abort or prefetch abort) into a 64bit guest. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| | * | arm64: KVM: Basic ESR_EL2 helpers and vcpu register accessMarc Zyngier2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implements helpers for dealing with the EL2 syndrome register as well as accessing the vcpu registers. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| | * | arm64: KVM: system register definitions for 64bit guestsMarc Zyngier2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Define the saved/restored registers for 64bit guests. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| | * | arm64: KVM: EL2 register definitionsMarc Zyngier2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Define all the useful bitfields for EL2 registers. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| | * | arm64: KVM: HYP mode idmap supportMarc Zyngier2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the necessary infrastructure for identity-mapped HYP page tables. Idmap-ed code must be in the ".hyp.idmap.text" linker section. The rest of the HYP ends up in ".hyp.text". Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| | * | arm64: KVM: define HYP and Stage-2 translation page flagsMarc Zyngier2013-06-07
| | |/ | | | | | | | | | | | | | | | | | | | | | Add HYP and S2 page flags, for both normal and device memory. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| * | Merge tag 'xen-arm64-3.1-tag' of ↵Catalin Marinas2013-06-12
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sstabellini/xen into upstream Introduce Xen support to ARM64 * tag 'xen-arm64-3.1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/sstabellini/xen: MAINTAINERS: add myself as arm64/xen maintainer arm64/xen: introduce CONFIG_XEN and hypercall.S on ARM64 arm64/xen: use XEN_IO_PROTO_ABI_ARM on ARM64 arm64/xen: implement ioremap_cached on arm64 arm64/xen: introduce asm/xen header files on arm64 arm/xen: define xen_remap as ioremap_cached
| | * | arm64/xen: introduce CONFIG_XEN and hypercall.S on ARM64Stefano Stabellini2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce CONFIG_XEN and the implementation of hypercall.S (that is the only ARMv8 specific code in Xen support for ARM). Compile enlighten.c and grant_table.c from arch/arm. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com>
| | * | arm64/xen: implement ioremap_cached on arm64Stefano Stabellini2013-06-07
| | | | | | | | | | | | | | | | Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
| | * | arm64/xen: introduce asm/xen header files on arm64Stefano Stabellini2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | asm/xen/hypercall.h, asm/xen/hypervisor.h, asm/xen/interface.h and asm/xen/page.h are identical so to avoid code duplication we are just including the original arm header files here. asm/xen/events.h is slightly different, so introduce a different file here (use xchg to implement xchg_xen_ulong and pass regs->pstate to raw_irqs_disabled_flags). Also introduce asm/hypervisor.h and asm/sync_bitops.h. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com>
| * | | arm64: debug: consolidate software breakpoint handlersWill Deacon2013-06-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The software breakpoint handlers are hooked in directly from ptrace, which makes it difficult to add additional handlers for things like kprobes and kgdb. This patch moves the handling code into debug-monitors.c, where we can dispatch to different debug subsystems more easily. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * | | arm64: extable: sort the exception table at build timeWill Deacon2013-06-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As is done for other architectures, sort the exception table at build-time rather than during boot. Since sortextable appears to be a standalone C program relying on the host elf.h to provide EM_AARCH64, I've had to add a conditional check in order to allow cross-compilation on machines that aren't running a bleeding-edge libc-dev. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * | | arm64: device: add iommu pointer to device archdataWill Deacon2013-06-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When using an IOMMU for device mappings, it is necessary to keep a pointer between the device and the IOMMU to which it is attached in order to obtain the correct IOMMU when attaching the device to a domain. This patch adds an iommu pointer to the dev_archdata structure, in a similar manner to other architectures (ARM, PowerPC, x86, ...). Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * | | arm64: pgtable: use pte_index instead of __pte_indexWill Deacon2013-06-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | pte_index is a useful helper outside of arch/arm64, for things like the ARM SMMU driver, so rename __pte_index to pte_index to be consistent with both arch/arm/ and also the definitions of pmd_index and pgd_index. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * | | arm64: kernel: compiling issue, need delete read_current_timer()Chen Gang2013-06-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Under arm64, we will calibrate the delay loop statically using a known timer frequency, so delete read_current_timer(), or it will cause compiling issue with allmodconfig. The related error: ERROR: "read_current_timer" [lib/rbtree_test.ko] undefined! ERROR: "read_current_timer" [lib/interval_tree_test.ko] undefined! ERROR: "read_current_timer" [fs/ext4/ext4.ko] undefined! ERROR: "read_current_timer" [crypto/tcrypt.ko] undefined! Signed-off-by: Chen Gang <gang.chen@asianux.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * | | arm64: mm: don't bother invalidating the icache in switch_mmWill Deacon2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We don't support software broadcast of cache maintenance operations, so this flush is not required (__sync_icache_dcache will always affect all CPUs). Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * | | arm64: spinlock: retry trylock operation if strex fails on free lockCatalin Marinas2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | An exclusive store instruction may fail for reasons other than lock contention (e.g. a cache eviction during the critical section) so, in line with other architectures using similar exclusive instructions (alpha, mips, powerpc), retry the trylock operation if the lock appears to be free but the strex reported failure. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Reported-by: Tony Thompson <anthony.thompson@arm.com> Acked-by: Will Deacon <will.deacon@arm.com>
| * | | arm64: Remove __flush_dcache_page()Catalin Marinas2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This function is only used in __sync_icache_dcache(), so remove it and call __flush_dcache_area() directly. The flush_icache_user_range() function is not used in the arm64 kernel. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Reported-by: Will Deacon <will.deacon@arm.com> Acked-by: Will Deacon <will.deacon@arm.com>
| * | | arm64: Do not flush the D-cache for anonymous pagesCatalin Marinas2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The D-cache on AArch64 is VIPT non-aliasing, so there is no need to flush it for anonymous pages. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Reported-by: Will Deacon <will.deacon@arm.com> Acked-by: Will Deacon <will.deacon@arm.com>
| * | | arm64: Avoid cache flushing in flush_dcache_page()Catalin Marinas2013-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The flush_dcache_page() function is called when the kernel modified a page cache page. Since the D-cache on AArch64 does not have aliases this function can simply mark the page as dirty for later flushing via set_pte_at()/__sync_icache_dcache() if the page is executable (to ensure the I-D cache coherency). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Reported-by: Will Deacon <will.deacon@arm.com> Acked-by: Will Deacon <will.deacon@arm.com>
| * | | arm64: Provide default implementation for dma_{alloc,free}_attrsDamian Hobson-Garcia2013-06-07
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Most architectures that define CONFIG_HAS_DMA, have implementations for both dma_alloc_attrs() and dma_free_attrs(). All achitectures that do not define CONFIG_HAS_DMA also have both of these definitions provided by dma-mapping-broken.h. Add default implementations for these functions on arm64. Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* | | Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-armLinus Torvalds2013-07-03
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull ARM updates from Russell King: "This contains the usual updates from other people (listed below) and the usual random muddle of miscellaneous ARM updates which cover some low priority bug fixes and performance improvements. I've started to put the pull request wording into the merge commits, which are: - NoMMU stuff: This includes the following series sent earlier to the list: - nommu-fixes - R7 Support - MPU support I've left out the ARCH_MULTIPLATFORM/!MMU stuff that Arnd and I were discussing today until we've reached a conclusion/that's had some more review. This is rebased (and re-tested) on your devel-stable branch because otherwise there were going to be conflicts with Uwe's V7M work now that you've merged that. I've included the fix for limiting MPU to CPU_V7. - Huge page support These changes bring both HugeTLB support and Transparent HugePage (THP) support to ARM. Only long descriptors (LPAE) are supported in this series. The code has been tested on an Arndale board (Exynos 5250). - LPAE updates Please pull these miscellaneous LPAE fixes I've been collecting for a while now for 3.11. They've been tested and reviewed by quite a few people, and most of the patches are pretty trivial. -- Will Deacon. - arch_timer cleanups Please pull these arch_timer cleanups I've been holding onto for a while. They're the same as my last posting, but have been rebased to v3.10-rc3. - mpidr linearisation (multiprocessor id register - identifies which CPU number we are in the system) This patch series that implements MPIDR linearization through a simple hashing algorithm and updates current cpu_{suspend}/{resume} code to use the newly created hash structures to retrieve context pointers. It represents a stepping stone for the implementation of power management code on forthcoming multi-cluster ARM systems. It has been tested on TC2 (dual cluster A15xA7 system), iMX6q, OMAP4 and Tegra, with processors hitting low-power states requiring warm-boot resume through the cpu_resume code path" * 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (77 commits) ARM: 7775/1: mm: Remove do_sect_fault from LPAE code ARM: 7777/1: Avoid extra calls to the C compiler ARM: 7774/1: Fix dtb dependency to use order-only prerequisites ARM: 7770/1: remove residual ARMv2 support from decompressor ARM: 7769/1: Cortex-A15: fix erratum 798181 implementation ARM: 7768/1: prevent risks of out-of-bound access in ASID allocator ARM: 7767/1: let the ASID allocator handle suspended animation ARM: 7766/1: versatile: don't mark pen as __INIT ARM: 7765/1: perf: Record the user-mode PC in the call chain. ARM: 7735/2: Preserve the user r/w register TPIDRURW on context switch and fork ARM: kernel: implement stack pointer save array through MPIDR hashing ARM: kernel: build MPIDR hash function data structure ARM: mpu: Ensure that MPU depends on CPU_V7 ARM: mpu: protect the vectors page with an MPU region ARM: mpu: Allow enabling of the MPU via kconfig ARM: 7758/1: introduce config HAS_BANDGAP ARM: 7757/1: mm: don't flush icache in switch_mm with hardware broadcasting ARM: 7751/1: zImage: don't overwrite ourself with a page table ARM: 7749/1: spinlock: retry trylock operation if strex fails on free lock ARM: 7748/1: oabi: handle faults when loading swi instruction from userspace ...
| * \ \ Merge branch 'devel-stable' into for-nextRussell King2013-06-29
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/arm/Makefile arch/arm/include/asm/glue-proc.h
| | * | | clocksource: arch_timer: use virtual countersMark Rutland2013-06-07
| | | |/ | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Switching between reading the virtual or physical counters is problematic, as some core code wants a view of time before we're fully set up. Using a function pointer and switching the source after the first read can make time appear to go backwards, and having a check in the read function is an unfortunate block on what we want to be a fast path. Instead, this patch makes us always use the virtual counters. If we're a guest, or don't have hyp mode, we'll use the virtual timers, and as such don't care about CNTVOFF as long as it doesn't change in such a way as to make time appear to travel backwards. As the guest will use the virtual timers, a (potential) KVM host must use the physical timers (which can wake up the host even if they fire while a guest is executing), and hence a host must have CNTVOFF set to zero so as to have a consistent view of time between the physical timers and virtual counters. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Cc: Rob Herring <rob.herring@calxeda.com>
* | | | Merge branch 'sched-mm-for-linus' of ↵Linus Torvalds2013-07-02
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull voluntary preemption fixes from Ingo Molnar: "This tree contains a speedup which is achieved through better might_sleep()/might_fault() preemption point annotations for uaccess functions, by Michael S Tsirkin: 1. The only reason uaccess routines might sleep is if they fault. Make this explicit for all architectures. 2. A voluntary preemption point in uaccess functions means compiler can't inline them efficiently, this breaks assumptions that they are very fast and small that e.g. net code seems to make. Remove this preemption point so behaviour matches with what callers assume. 3. Accesses (e.g through socket ops) to kernel memory with KERNEL_DS like net/sunrpc does will never sleep. Remove an unconditinal might_sleep() in the might_fault() inline in kernel.h (used when PROVE_LOCKING is not set). 4. Accesses with pagefault_disable() return EFAULT but won't cause caller to sleep. Check for that and thus avoid might_sleep() when PROVE_LOCKING is set. These changes offer a nice speedup for CONFIG_PREEMPT_VOLUNTARY=y kernels, here's a network bandwidth measurement between a virtual machine and the host: before: incoming: 7122.77 Mb/s outgoing: 8480.37 Mb/s after: incoming: 8619.24 Mb/s [ +21.0% ] outgoing: 9455.42 Mb/s [ +11.5% ] I kept these changes in a separate tree, separate from scheduler changes, because it's a mixed MM and scheduler topic" * 'sched-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: mm, sched: Allow uaccess in atomic with pagefault_disable() mm, sched: Drop voluntary schedule from might_fault() x86: uaccess s/might_sleep/might_fault/ tile: uaccess s/might_sleep/might_fault/ powerpc: uaccess s/might_sleep/might_fault/ mn10300: uaccess s/might_sleep/might_fault/ microblaze: uaccess s/might_sleep/might_fault/ m32r: uaccess s/might_sleep/might_fault/ frv: uaccess s/might_sleep/might_fault/ arm64: uaccess s/might_sleep/might_fault/ asm-generic: uaccess s/might_sleep/might_fault/
| * | | | arm64: uaccess s/might_sleep/might_fault/Michael S. Tsirkin2013-05-28
| | |/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The only reason uaccess routines might sleep is if they fault. Make this explicit. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1369577426-26721-2-git-send-email-mst@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | | | Merge branch 'for-linus' of ↵Linus Torvalds2013-07-02
|\ \ \ \ | |_|/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull VFS patches (part 1) from Al Viro: "The major change in this pile is ->readdir() replacement with ->iterate(), dealing with ->f_pos races in ->readdir() instances for good. There's a lot more, but I'd prefer to split the pull request into several stages and this is the first obvious cutoff point." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (67 commits) [readdir] constify ->actor [readdir] ->readdir() is gone [readdir] convert ecryptfs [readdir] convert coda [readdir] convert ocfs2 [readdir] convert fatfs [readdir] convert xfs [readdir] convert btrfs [readdir] convert hostfs [readdir] convert afs [readdir] convert ncpfs [readdir] convert hfsplus [readdir] convert hfs [readdir] convert befs [readdir] convert cifs [readdir] convert freevxfs [readdir] convert fuse [readdir] convert hpfs reiserfs: switch reiserfs_readdir_dentry to inode reiserfs: is_privroot_deh() needs only directory inode, actually ...
| * | | consolidate io_remap_pfn_range definitionsAl Viro2013-06-29
| | |/ | |/| | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* / | perf: arm64: Record the user-mode PC in the call chain.Jed Davis2013-06-20
|/ / | | | | | | | | | | | | | | | | | | | | | | With this change, we no longer lose the innermost entry in the user-mode part of the call chain. See also the x86 port, which includes the ip, and the corresponding change in arch/arm. Signed-off-by: Jed Davis <jld@mozilla.com> Acked-by: Ingo Molnar <mingo@kernel.org> Acked-by: Will Deacon <will.deacon@arm.com> Cc: stable@vger.kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* | arm64: don't kill the kernel on a bad esr from el0Mark Rutland2013-05-31
| | | | | | | | | | | | | | | | | | | | | | Rather than completely killing the kernel if we receive an esr value we can't deal with in the el0 handlers, send the process a SIGILL and log the esr value in the hope that we can debug it. If we receive a bad esr from el1, we'll die() as before. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: stable@vger.kernel.org
* | arm64: treat unhandled compat el0 traps as undefMark Rutland2013-05-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, if a compat process reads or writes from/to a disabled cp15/cp14 register, the trap is not handled by the el0_sync_compat handler, and the kernel will head to bad_mode, where it will die(), and oops(). For 64 bit processes, disabled system register accesses are currently treated as unhandled instructions. This patch modifies entry.S to treat these unhandled traps as undefined instructions, sending a SIGILL to userspace. This gives processes a chance to handle this and stop using inaccessible registers, and prevents further issues in the kernel as a result of the die(). Reported-by: Johannes Jensen <Johannes.Jensen@arm.com> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* | arm64: Do not report user faults for handled signalsCatalin Marinas2013-05-24
| | | | | | | | | | | | | | | | | | Currently user faults (page, undefined instruction) are always reported even though the user may have a signal handler for them. This patch adds unhandled_signal() check together with printk_ratelimit() for these cases. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* | arm64: kernel: compiling issue, need 'EXPORT_SYMBOL(clear_page)'Chen Gang2013-05-24
|/ | | | | | | | | | | | | | | | | | Need 'EXPORT_SYMBOL(clear_page)' if building with allmodconfig. The related errors: ERROR: "clear_page" [fs/ocfs2/dlm/ocfs2_dlm.ko] undefined! ERROR: "clear_page" [fs/ntfs/ntfs.ko] undefined! ERROR: "clear_page" [fs/gfs2/gfs2.ko] undefined! ERROR: "clear_page" [fs/fuse/fuse.ko] undefined! ERROR: "clear_page" [fs/ext3/ext3.ko] undefined! ERROR: "clear_page" [fs/ext2/ext2.ko] undefined! ERROR: "clear_page" [fs/exofs/libore.ko] undefined! ERROR: "clear_page" [fs/exofs/exofs.ko] undefined! ERROR: "clear_page" [drivers/block/brd.ko] undefined! Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: debug: fix mdscr.ss check when enabling debug exceptionsWill Deacon2013-05-17
| | | | | | | | | | | | When we take an exception at EL1, we only want to enable debug exceptions if we're not currently stepping, otherwise we can easily get stuck in a loop stepping into interrupt handlers. Unfortunately, the current code tests the wrong bit in the mdscr, so fix that. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: Do not source kernel/time/Kconfig explicitlyCatalin Marinas2013-05-14
| | | | | | | | As per commit 764e0da1 (timers: Fixup the Kconfig consolidation fallout), init/Kconfig already includes kernel/time/Kconfig, so no need to do it explicitly for arm64. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: mm: Fix operands of clz in __flush_dcache_allSukanto Ghosh2013-05-14
| | | | | | | | | | | | | | The format of the lower 32-bits of the 64-bit operand to 'dc cisw' is unchanged from ARMv7 architecture and the upper bits are RES0. This implies that the 'way' field of the operand of 'dc cisw' occupies the bit-positions [31 .. (32-A)]. Due to the use of 64-bit extended operands to 'clz', the existing implementation of __flush_dcache_all is incorrectly placing the 'way' field in the bit-positions [63 .. (64-A)]. Signed-off-by: Sukanto Ghosh <sghosh@apm.com> Tested-by: Anup Patel <anup.patel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: stable@vger.kernel.org
* arm64: Invoke the of_platform_populate() at arch_initcall() levelCatalin Marinas2013-05-14
| | | | | | | | | | | The of_platform_populate() is currently invoked at device_initcall() level. There are however drivers that use platform_driver_probe() directly and they need the devices to be populated. This patch makes the of_platform_populate() and arch_initcall(). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Reported-by: Benoit Lecardonnel <Benoit.Lecardonnel@synopsys.com> Tested-by: Benoit Lecardonnel <Benoit.Lecardonnel@synopsys.com>
* arm64: debug: clear mdscr_el1 instead of taking the OS lockWill Deacon2013-05-13
| | | | | | | | | | | | | | | | | | | | | During boot, we take the debug OS lock before interrupts are enabled. This is required to prevent clearing of PSTATE.D on the interrupt entry path, which could result in spurious debug exceptions before we've got round to resetting things like the hardware breakpoints registers to a sane state. A problem with this approach is that taking the OS lock prevents an external JTAG debugger from debugging the system, which is especially irritating during boot, where JTAG debugging can be most useful. This patch clears mdscr_el1 rather than taking the lock, clearing the MDE and KDE bits and preventing self-hosted hardware debug exceptions from occurring. Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: stable@vger.kernel.org
* arm64: Fix duplicate definition of early_consoleChen Gang2013-05-13
| | | | | | | | | | When compiling with allmodconfig. early_console is already defined as an extern global pointer. Need let it point to the object which we intend to (like arm32 done). Signed-off-by: Chen Gang <gang.chen@asianux.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2013-05-10
|\ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal Pull stray syscall bits from Al Viro: "Several syscall-related commits that were missing from the original" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: switch compat_sys_sysctl to COMPAT_SYSCALL_DEFINE unicore32: just use mmap_pgoff()... unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE x86, vm86: fix VM86 syscalls: use SYSCALL_DEFINEx(...)
| * unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINEAl Viro2013-05-09
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linuxLinus Torvalds2013-05-09
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull removal of GENERIC_GPIO from Grant Likely: "GENERIC_GPIO now synonymous with GPIOLIB. There are no longer any valid cases for enableing GENERIC_GPIO without GPIOLIB, even though it is possible to do so which has been causing confusion and breakage. This branch does the work to completely eliminate GENERIC_GPIO." * tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux: gpio: update gpio Chinese documentation Remove GENERIC_GPIO config option Convert selectors of GENERIC_GPIO to GPIOLIB blackfin: force use of gpiolib m68k: coldfire: use gpiolib mips: pnx833x: remove requirement for GENERIC_GPIO openrisc: default GENERIC_GPIO to false avr32: default GENERIC_GPIO to false xtensa: remove explicit selection of GENERIC_GPIO sh: replace CONFIG_GENERIC_GPIO by CONFIG_GPIOLIB powerpc: remove redundant GENERIC_GPIO selection unicore32: default GENERIC_GPIO to false unicore32: remove unneeded select GENERIC_GPIO arm: plat-orion: use GPIO driver on CONFIG_GPIOLIB arm: remove redundant GENERIC_GPIO selection mips: alchemy: require gpiolib mips: txx9: change GENERIC_GPIO to GPIOLIB mips: loongson: use GPIO driver on CONFIG_GPIOLIB mips: remove redundant GENERIC_GPIO select
| * | Remove GENERIC_GPIO config optionAlexandre Courbot2013-04-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | GENERIC_GPIO has been made equivalent to GPIOLIB in architecture code and all driver code has been switch to depend on GPIOLIB. It is thus safe to have GENERIC_GPIO removed. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Grant Likely <grant.likely@secretlab.ca>
generated by cgit v1.2.2 (git 2.25.0) at 2025-08-09 00:47:56 -0400