linux/drivers/clocksource/arm_generic.c, branch v3.8

Merge tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

2012-12-12T15:49:02Z

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

arm64: generic timer: use virtual counter instead of physical at EL0

2012-12-05T11:20:04Z

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 Signed-off-by: Will Deacon Signed-off-by: Catalin Marinas

clocksource: arm_generic: use this_cpu_ptr per-cpu helper

2012-11-13T19:04:52Z

Utilize this_cpu_ptr() instead of per_cpu_ptr(...,smp_processor_id()) Signed-off-by: Shan Wei Reviewed-by: Christoph Lameter Signed-off-by: John Stultz

clocksource: arm_generic: use integer math helpers

2012-11-13T19:04:52Z

This will make the two crucial integer divisions in the generic ARM arch timer used for ARMv8 use the kernel DIV_ROUND_CLOSEST() helper inline from so they get more precise. Cc: Marc Zyngier Cc: Catalin Marinas Signed-off-by: Linus Walleij Signed-off-by: John Stultz

arm64: Generic timers support

2012-09-17T12:42:20Z

This patch adds support for the ARM generic timers with A64 instructions for accessing the timer registers. It uses the physical counter as the clock source and the virtual counter as sched_clock. The timer frequency can be specified via DT or read from the CNTFRQ_EL0 register. The physical counter is also accessible from user space allowing fast gettimeofday() implementation. Signed-off-by: Marc Zyngier Signed-off-by: Will Deacon Signed-off-by: Catalin Marinas Acked-by: Tony Lindgren Acked-by: Nicolas Pitre Acked-by: Olof Johansson Acked-by: Santosh Shilimkar Acked-by: Arnd Bergmann