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2012-12-12Merge tag 'arm64-for-linus' of ↵Linus Torvalds29-366/+469
git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64 Pull ARM64 updates from Catalin Marinas: - Generic execve, kernel_thread, fork/vfork/clone. - Preparatory patches for KVM support (initialising EL2 mode for later installing KVM support, hypervisor stub). - Signal handling corner case fix (alternative signal stack set up for a SEGV handler, which is raised in response to RLIMIT_STACK being reached). - Sub-nanosecond timer error fix. * tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: (30 commits) arm64: Update the MAINTAINERS entry arm64: compat for clock_adjtime(2) is miswired arm64: move FP-SIMD save/restore code to a macro arm64: hyp: initialize vttbr_el2 to zero arm64: add hypervisor stub arm64: record boot mode when entering the kernel arm64: move vector entry macro to assembler.h arm64: add AArch32 execution modes to ptrace.h arm64: expand register mapping between AArch32 and AArch64 arm64: generic timer: use virtual counter instead of physical at EL0 arm64: vdso: defer shifting of nanosecond component of timespec arm64: vdso: rework __do_get_tspec register allocation and return shift arm64: vdso: check sequence counter even for coarse realtime operations arm64: vdso: fix clocksource mask when extracting bottom 56 bits ARM64: Remove incorrect Kconfig symbol HAVE_SPARSE_IRQ Documentation: Fixes a word in Documentation/arm64/memory.txt arm64: Make !dirty ptes read-only arm64: Convert empty flush_cache_{mm,page} functions to static inline arm64: signal: let the compiler inline compat_get_sigframe arm64: signal: return struct rt_sigframe from get_sigframe ... Conflicts: arch/arm64/include/asm/unistd32.h
2012-12-11Merge branch 'perf-core-for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf updates from Ingo Molnar: "Lots of activity: 211 files changed, 8328 insertions(+), 4116 deletions(-) most of it on the tooling side. Main changes: * ftrace enhancements and fixes from Steve Rostedt. * uprobes fixes, cleanups and preparation for the ARM port from Oleg Nesterov. * UAPI fixes, from David Howels - prepares the arch/x86 UAPI transition * Separate perf tests into multiple objects, one per test, from Jiri Olsa. * Make hardware event translations available in sysfs, from Jiri Olsa. * Fixes to /proc/pid/maps parsing, preparatory to supporting data maps, from Namhyung Kim * Implement ui_progress for GTK, from Namhyung Kim * Add framework for automated perf_event_attr tests, where tools with different command line options will be run from a 'perf test', via python glue, and the perf syscall will be intercepted to verify that the perf_event_attr fields set by the tool are those expected, from Jiri Olsa * Add a 'link' method for hists, so that we can have the leader with buckets for all the entries in all the hists. This new method is now used in the default 'diff' output, making the sum of the 'baseline' column be 100%, eliminating blind spots. * libtraceevent fixes for compiler warnings trying to make perf it build on some distros, like fedora 14, 32-bit, some of the warnings really pointed to real bugs. * Add a browser for 'perf script' and make it available from the report and annotate browsers. It does filtering to find the scripts that handle events found in the perf.data file used. From Feng Tang * perf inject changes to allow showing where a task sleeps, from Andrew Vagin. * Makefile improvements from Namhyung Kim. * Add --pre and --post command hooks in 'stat', from Peter Zijlstra. * Don't stop synthesizing threads when one vanishes, this is for the existing threads when we start a tool like trace. * Use sched:sched_stat_runtime to provide a thread summary, this produces the same output as the 'trace summary' subcommand of tglx's original "trace" tool. * Support interrupted syscalls in 'trace' * Add an event duration column and filter in 'trace'. * There are references to the man pages in some tools, so try to build Documentation when installing, warning the user if that is not possible, from Borislav Petkov. * Give user better message if precise is not supported, from David Ahern. * Try to find cross-built objdump path by using the session environment information in the perf.data file header, from Irina Tirdea, original patch and idea by Namhyung Kim. * Diplays more output on features check for make V=1, so that one can figure out what is happening by looking at gcc output, etc. From Jiri Olsa. * Add on_exit implementation for systems without one, e.g. Android, from Bernhard Rosenkraenzer. * Only process events for vcpus of interest, helps handling large number of events, from David Ahern. * Cross compilation fixes for Android, from Irina Tirdea. * Add documentation on compiling for Android, from Irina Tirdea. * perf diff improvements from Jiri Olsa. * Target (task/user/cpu/syswide) handling improvements, from Namhyung Kim. * Add support in 'trace' for tracing workload given by command line, from Namhyung Kim. * ... and much more." * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (194 commits) uprobes: Use percpu_rw_semaphore to fix register/unregister vs dup_mmap() race perf evsel: Introduce is_group_member method perf powerpc: Use uapi/unistd.h to fix build error tools: Pass the target in descend tools: Honour the O= flag when tool build called from a higher Makefile tools: Define a Makefile function to do subdir processing perf ui: Always compile browser setup code perf ui: Add ui_progress__finish() perf ui gtk: Implement ui_progress functions perf ui: Introduce generic ui_progress helper perf ui tui: Move progress.c under ui/tui directory perf tools: Add basic event modifier sanity check perf tools: Omit group members from perf_evlist__disable/enable perf tools: Ensure single disable call per event in record comand perf tools: Fix 'disabled' attribute config for record command perf tools: Fix attributes for '{}' defined event groups perf tools: Use sscanf for parsing /proc/pid/maps perf tools: Add gtk.<command> config option for launching GTK browser perf tools: Fix compile error on NO_NEWT=1 build perf hists: Initialize all of he->stat with zeroes ...
2012-12-11Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds4-11/+17
Pull device tree changes from Grant Likely: "Here are the DT changes I've got queued up for v3.8. As described below, there are a lot of bug fixes here and documentation updates but nothing major: Bug fixes, little cleanups, and documentation changes. The most invasive thing here touches a bunch of the arch directories to use a common build rule for .dtb files. There are no major changes to functionality here other than a few new helper functions." * tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux-2.6: (34 commits) arm64: Fix the dtbs target building mtd: nand: davinci: fix the binding documentation rtc: rtc-mv: Add the device tree binding documentation devicetree/bindings: Move gpio-leds binding into leds directory of/vendor-prefixes: add Imagination Technologies microblaze: use new common dtc rule c6x: use new common dtc rule openrisc: use new common dtc rule arm64: Add dtbs target for building all the enabled dtb files arm64: use new common dtc rule ARM: dt: change .dtb build rules to build in dts directory kbuild: centralize .dts->.dtb rule Fix build when CONFIG_W1_MASTER_GPIO=m b exporting "allnodes" of/spi: Honour "status=disabled" property of device of_mdio: Honour "status=disabled" property of device of_i2c: Honour "status=disabled" property of device powerpc: Fix fallout from device_node->name constification of: add 'const' for of_parse_phandle parameter *np Documentation: correct of_platform_populate() argument list script: dtc: clean generated files ...
2012-12-10arm64: Fix the dtbs target buildingCatalin Marinas1-1/+1
The arch/arm64/Makefile was not passing the right target to the boot/dts/Makefile. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2012-12-08Merge branch 'tip/perf/core' of ↵Ingo Molnar1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/core Pull ftrace updates from Steve Rostedt. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-12-05arm64: compat for clock_adjtime(2) is miswiredAl Viro1-1/+1
struct timex is different on arm and arm64; adjtimex(2) takes care to convert, clock_adjtime(2) doesn't... Signed-off-by: Al Viro <viro@ZenIV.linux.org.uk> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: <stable@vger.kernel.org>
2012-12-05arm64: move FP-SIMD save/restore code to a macroMarc Zyngier2-40/+67
In order to be able to reuse the save-restore code in KVM, move it to a pair of macros, similar to what the 32bit code does. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-05arm64: hyp: initialize vttbr_el2 to zeroMarc Zyngier1-0/+3
The architecture doesn't mandate any reset value for vttbr_el2. Better set it to a known value before some HYP code gets confused. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-05arm64: add hypervisor stubMarc Zyngier4-1/+118
If booted in EL2, install an dummy hypervisor whose only purpose is to be replaced by a full fledged one. A minimal API allows to: - obtain the current HYP vectors (__hyp_get_vectors) - set new HYP vectors (__hyp_set_vectors) Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-05arm64: record boot mode when entering the kernelMarc Zyngier2-3/+73
To be able to signal the availability of EL2 to other parts of the kernel, record the boot mode. Once booted, two predicates indicate if HYP mode is available, and if not, whether this is due to a boot mode mismatch or not. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-05arm64: move vector entry macro to assembler.hMarc Zyngier2-4/+8
This macro is also useful to other bits defining vectors (hypervisor stub, KVM...). Move it to a common location. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-05arm64: add AArch32 execution modes to ptrace.hMarc Zyngier1-0/+10
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-05arm64: expand register mapping between AArch32 and AArch64Marc Zyngier1-2/+19
The general purpose registers in AArch32 are mapped in an architecturally defined manner into the AArch64 registers. It allows the AArch32 registers of an application or a virtual machine to be inspected by the OS or an hypervisor. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-05arm64: generic timer: use virtual counter instead of physical at EL0Will Deacon3-6/+7
We want to use the virtual counter at EL0, as the physical counter may not track the current clocksource for guests running under a hypervisor. This patch updates the vdso and generic timer driver to use the virtual counter. The kernel EL2 entry code is also updated to ensure that the virtual offset is initialised to zero. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-05arm64: vdso: defer shifting of nanosecond component of timespecWill Deacon2-3/+7
Shifting the nanosecond component of the computed timespec early can lead to sub-ns inaccuracies when using the truncated value as input to further arithmetic for things like conversions to monotonic time. This patch defers the timespec shifting until after the final value has been computed. Reported-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-05arm64: vdso: rework __do_get_tspec register allocation and return shiftWill Deacon1-44/+44
In preparation for sub-ns precision in the vdso timespec maths, change the __do_get_tspec register allocation so that we return the clocksource shift value instead of the unused xtime tspec. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-05arm64: vdso: check sequence counter even for coarse realtime operationsWill Deacon1-3/+3
When returning coarse realtime values from clock_gettime, we must still check the sequence counter to ensure that the kernel does not update the vdso datapage whilst we are loading the coarse timespec as this could potentially result in time appearing to go backwards. This patch delays the coarse realtime check until after we have loaded successfully from the vdso datapage. This does mean that we always load the wtm timespec, but conditionalising the load and adding an extra sequence test is unlikely to buy us anything other than messy code, particularly as the sequence test implies a read barrier. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-05arm64: vdso: fix clocksource mask when extracting bottom 56 bitsWill Deacon1-1/+1
The generic timer clocksource has 56 bits of precision and as such must be masked appropriately after we have read it. The current mask generated by a movn instruction is off by 4 bits, so we accidentally include the top 4 bits in the final value. This patch fixes the broken mask. Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-03arm64: Add dtbs target for building all the enabled dtb filesRob Herring2-6/+12
Based on Rob Herring's patches for arch/arm, this patch adds a dtbs target to arch/arm64/boot/Makefile. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2012-12-03arm64: use new common dtc ruleStephen Warren3-6/+6
The current rules have the .dtb files build in a different directory from the .dts files. This patch changes arm64 to use the generic dtb rule which builds .dtb files in the same directory as the source .dts. This requires moving parts of arch/arm64/boot/Makefile into newly created arch/arm64/boot/dts/Makefile, and updating arch/arm64/Makefile to call the new Makefile. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2012-12-02open*(2) compat fixes (s390, arm64)Al Viro1-1/+1
The usual rules for open()/openat()/open_by_handle_at() are 1) native 32bit - don't force O_LARGEFILE in flags 2) native 64bit - force O_LARGEFILE in flags 3) compat on 64bit host - as for native 32bit 4) native 32bit ABI for 64bit system (mips/n32, x86/x32) - as for native 64bit There are only two exceptions - s390 compat has open() forcing O_LARGEFILE and arm64 compat has open_by_handle_at() doing the same thing. The same binaries on native host (s390/31 and arm resp.) will *not* force O_LARGEFILE, so IMO both are emulation bugs. Objections? The fix is obvious... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-11-29ARM64: Remove incorrect Kconfig symbol HAVE_SPARSE_IRQAlexander Shiyan1-1/+0
Kernel does not contain symbol HAVE_SPARSE_IRQ. Definition in arch/arm64/Kconfig seems typo because valid symbol is MAY_HAVE_SPARSE_IRQ. In any case SPARSE_IRQ is selected by default and we just remove selecting of this symbol. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-11-29arm64: Make !dirty ptes read-onlyCatalin Marinas1-0/+2
The AArch64 Linux port relies on the mm code to wrprotect clean ptes. This however is not the case with newly created ptes and PAGE_SHARED(_EXEC) is writable but !dirty. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: <stable@vger.kernel.org>
2012-11-23arm64: Convert empty flush_cache_{mm,page} functions to static inlineCatalin Marinas2-11/+9
These functions are empty, just make them static inline in the header. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-11-23arm64: signal: let the compiler inline compat_get_sigframeWill Deacon1-3/+3
There's no reason to mark compat_get_sigframe inline explicitly, so remove the annotation and let the compiler decide what's best. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-11-23arm64: signal: return struct rt_sigframe from get_sigframeWill Deacon1-6/+6
We only have one type of frame (rt_sigframe) for arm64, so just return that type directly and dispense with the framesize argument, which is presumably a hangover from code copied from arch/arm/. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-11-23arm64: signal: align return types for compat and native setup_returnWill Deacon1-9/+5
setup_return is a void function, so make compat_setup_return look the same rather then unconditionally return 0. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-11-23arm64: signal: push the unwinding prologue on the signal stackWill Deacon1-21/+16
To allow debuggers to unwind through signal frames, we create a fake stack unwinding prologue containing the link register and frame pointer of the interrupted context. The signal frame is then offset by 16 bytes to make room for the two saved registers which are pushed onto the frame of the *interrupted* context, rather than placed directly above the signal stack. This doesn't work when an alternative signal stack is set up for a SEGV handler, which is raised in response to RLIMIT_STACK being reached. In this case, we try to push the unwinding prologue onto the full stack and subsequently take a fault which we fail to resolve, causing setup_return to return -EFAULT and handle_signal to force_sigsegv on the current task. This patch fixes the problem by including the unwinding prologue as part of the rt_sigframe definition, which is populated during setup_sigframe, ensuring that it always ends up on the signal stack. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: <stable@vger.kernel.org>
2012-11-23arm64: Include the clkdev.h generic headerCatalin Marinas1-0/+1
This patch updates the arm64 asm/Kbuild file to include the clkdev.h generic header. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Viresh Kumar <Viresh.kumar@linaro.org>
2012-11-20arm64: Force use of common clk at architecture levelDeepak Saxena1-0/+1
Force all platforms to use the common clk framework to ensure that we do not end up with platform-specific implementations ala ARM32. Signed-off-by: Deepak Saxena <dsaxena@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-11-19Merge branch 'execve' into upstreamCatalin Marinas7-52/+25
* execve: arm64: get rid of fork/vfork/clone wrappers
2012-11-19Merge remote-tracking branch 'viro/arch-arm64' into execveCatalin Marinas7-52/+25
* viro/arch-arm64: arm64: get rid of fork/vfork/clone wrappers
2012-11-16Merge commit '6ba1bc826d160fe4f32bcb188687dcca4bdfaf3d' into arch-arm64Al Viro14-82/+92
Backmerge from mainline commit that introduced a trivial conflict in arch/arm64/kernel/process.c - a bunch of functions removed next to the place where kernel_thread() used to be. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-16arm64: Distinguish between user and kernel XN bitsCatalin Marinas3-23/+25
On AArch64, the meaning of the XN bit has changed to UXN (user). The PXN (privileged) bit must be set to prevent kernel execution. Without the PXN bit set, the CPU may speculatively access device memory. This patch ensures that all the mappings that the kernel must not execute from (including user mappings) have the PXN bit set. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-11-14Merge branch 'execve' into upstreamCatalin Marinas10-157/+33
* execve: arm64: Use generic sys_execve() implementation arm64: Use generic kernel_execve() implementation arm64: Use generic kernel_thread() implementation
2012-11-14arm64: mm: update max_dma32 before calculating size of NORMAL zoneWill Deacon1-2/+2
Commit f483a853b0b9 ("arm64: mm: fix booting on systems with no memory below 4GB") sets max_dma32 to the minimum of the maximum pfn and MAX_DMA32_PFN. This value is later used as the base of the NORMAL zone, which is incorrect when MAX_DMA32_PFN is below the minimum pfn (i.e. all memory is above 4GB). This patch fixes the problem by ensuring that max_dma32 is always set to the end of the DMA32 zone. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-11-14arm64: Make the user fault reporting more specificCatalin Marinas1-2/+11
For user space faults the kernel reports "unhandled page fault" and it gives the ESR value. With this patch the error message looked up in the fault info array to give a better description. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-11-13tracing,x86: Add a TSC trace_clockDavid Sharp1-0/+1
In order to promote interoperability between userspace tracers and ftrace, add a trace_clock that reports raw TSC values which will then be recorded in the ring buffer. Userspace tracers that also record TSCs are then on exactly the same time base as the kernel and events can be unambiguously interlaced. Tested: Enabled a tracepoint and the "tsc" trace_clock and saw very large timestamp values. v2: Move arch-specific bits out of generic code. v3: Rename "x86-tsc", cleanups v7: Generic arch bits in Kbuild. Google-Bug-Id: 6980623 Link: http://lkml.kernel.org/r/1352837903-32191-1-git-send-email-dhsharp@google.com Acked-by: Ingo Molnar <mingo@kernel.org> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@linux.intel.com> Signed-off-by: David Sharp <dhsharp@google.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2012-11-13Merge tag 'v3.7-rc5' into execveCatalin Marinas16-86/+97
Linux 3.7-rc5 Conflicts: arch/arm64/kernel/process.c
2012-11-08arm64: mm: fix booting on systems with no memory below 4GBWill Deacon2-1/+3
Booting on a system with all of its memory above the 4GB boundary breaks for two reasons: (1) We still try to create a non-empty DMA32 zone (2) no-bootmem limits allocations to 0xffffffff This patch fixes these issues for ARM64. Tested-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-11-08arm64: smp: add missing completion for secondary bootWill Deacon1-2/+1
Commit 149c24151e85 ("ARM: SMP: use a timing out completion for cpu hotplug") modified arm's CPU up path to use completions. It seems that we only got half of this patch for arm64, so add the missing call to complete. Reported-by: Jon Brawn <jon.brawn@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-11-08arm64: elf: fix core dumping definitions for GP and FP registersWill Deacon3-25/+3
struct user_fp does not exist for arm64, so use struct user_fpsimd_state instead for the ELF core dumping definitions. Furthermore, since we use regset-based core dumping, we do not need definitions for dump_task_regs and dump_fpu. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-11-08arm64: compat: select CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSIONWill Deacon2-1/+1
Commit c1d7e01d7877 ("ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION") replaced the __ARCH_WANT_COMPAT_IPC_PARSE_VERSION token with a corresponding Kconfig option instead. This patch updates arm64 to use the latter, rather than #define an unused token. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-11-08arm64: perf: use architected event for CPU cycle counterWill Deacon1-8/+2
We currently use a fake event encoding (0xFF) to indicate CPU cycles so that we don't waste an event counter and can target the hardware cycle counter instead. The problem with this approach is that the event space defined by the architecture permits an implementation to allocate 0xFF for some other event. This patch uses the architected cycle counter encoding (0x11) so that we avoid potentially clashing with event encodings on future CPU implementations. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-10-23arm64: Move PCI_IOBASE closer to MODULES_VADDRCatalin Marinas1-1/+1
This is to reuse the same pmd table that is sparsely populated with the modules space. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-10-23arm64: Use pgprot_t as the last argument when invoking __ioremap()Catalin Marinas1-3/+3
Even if it works with since the types have the same size, the correct type of the last __ioremap() argument is pgprot_t rather than pteval_t. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-10-22arm64: get rid of fork/vfork/clone wrappersAl Viro7-52/+25
[fixes from Catalin Marinas folded] Acked-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-20arm64: fix alignment padding in assembly codeMarc Zyngier2-1/+7
An interesting effect of using the generic version of linkage.h is that the padding is defined in terms of x86 NOPs, which can have even more interesting effects when the assembly code looks like this: ENTRY(func1) mov x0, xzr ENDPROC(func1) // fall through ENTRY(func2) mov x0, #1 ret ENDPROC(func2) Admittedly, the code is not very nice. But having code from another architecture doesn't look completely sane either. The fix is to add arm64's version of linkage.h, which causes the insertion of proper AArch64 NOPs. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-10-18arm64: ptrace: use HW_BREAKPOINT_EMPTY type for disabled breakpointsWill Deacon1-16/+21
If a debugger tries to zero a hardware debug control register, the kernel will try to infer both the type and length of the breakpoint in order to sanity-check against the requested regset type. This will fail because the encoding will appear as a zero-length breakpoint. This patch changes the control register setting so that disabled breakpoints are treated as HW_BREAKPOINT_EMPTY and no further sanity-checking is required. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-10-18arm64: ptrace: make structure padding explicit for debug registersWill Deacon2-7/+32
The user_hwdebug_state structure contains implicit padding to conform to the alignment requirements of the AArch64 ABI (namely that aggregates must be aligned to their most aligned member). This patch fixes the ptrace functions operating on struct user_hwdebug_state so that the padding is handled correctly. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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