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    Subject[PATCH RFC/RFT v2 0/8] drivers: cacheinfo support
    Date
    From: Sudeep Holla <sudeep.holla@arm.com>

    Hi,

    This series adds a generic cacheinfo support similar to topology. The
    implementation is based on x86 cacheinfo support. Currently x86, powerpc,
    ia64 and s390 have their own implementations. While adding similar support
    to ARM and ARM64, here is the attempt to make it generic quite similar to
    topology info support. It also adds the missing ABI documentation for
    the cacheinfo sysfs which is already being used.

    It moves all the existing different implementations on x86, ia64, powerpc
    and s390 to use the generic cacheinfo infrastructure introduced here.
    These changes on non-ARM platforms are only compile tested and hence
    the request for testing too.

    This series also adds support for ARM and ARM64 architectures based on
    the generic support.

    Changes v1->v2:
    - Extended the generic cacheinfo support to accomodate all
    the existing implementations
    - Moved all the existing implementations to use this new
    generic infrastructure
    - Added missing ABI documentation as suggested by Greg KH
    - Added support for unimplemented CTR on pre-ARMv6 implementations
    as suggested by Russell. However the ctr_info_list is not yet
    populated
    - not yet changed to device_attr as suggested by Greg KH,
    registering cache as device won't eliminate the need of kobject
    unless each index of cache is registered as a device which don't
    seem to be good idea, but now it's unified it can be done easily
    in one place if needed

    Sudeep Holla (8):
    drivers: base: support cpu cache information interface to userspace
    via sysfs
    ia64: move cacheinfo sysfs to generic cacheinfo infrastructure
    s390: move cacheinfo sysfs to generic cacheinfo infrastructure
    x86: move cacheinfo sysfs to generic cacheinfo infrastructure
    powerpc: move cacheinfo sysfs to generic cacheinfo infrastructure
    ARM64: kernel: add support for cpu cache information
    ARM: kernel: add support for cpu cache information
    ARM: kernel: add outer cache support for cacheinfo implementation

    Documentation/ABI/testing/sysfs-devices-system-cpu | 40 +
    arch/arm/include/asm/outercache.h | 13 +
    arch/arm/kernel/Makefile | 1 +
    arch/arm/kernel/cacheinfo.c | 248 ++++++
    arch/arm/mm/Kconfig | 13 +
    arch/arm/mm/cache-l2x0.c | 14 +
    arch/arm/mm/cache-tauros2.c | 35 +
    arch/arm/mm/cache-xsc3l2.c | 15 +
    arch/arm64/kernel/Makefile | 2 +-
    arch/arm64/kernel/cacheinfo.c | 134 ++++
    arch/ia64/kernel/topology.c | 399 ++--------
    arch/powerpc/kernel/cacheinfo.c | 828 +++------------------
    arch/powerpc/kernel/cacheinfo.h | 8 -
    arch/powerpc/kernel/sysfs.c | 4 -
    arch/s390/include/asm/processor.h | 6 -
    arch/s390/kernel/cache.c | 380 ++--------
    arch/s390/kernel/processor.c | 1 -
    arch/x86/kernel/cpu/intel_cacheinfo.c | 628 ++++------------
    drivers/base/Makefile | 2 +-
    drivers/base/cacheinfo.c | 520 +++++++++++++
    include/linux/cacheinfo.h | 60 ++
    21 files changed, 1495 insertions(+), 1856 deletions(-)
    create mode 100644 arch/arm/kernel/cacheinfo.c
    create mode 100644 arch/arm64/kernel/cacheinfo.c
    delete mode 100644 arch/powerpc/kernel/cacheinfo.h
    create mode 100644 drivers/base/cacheinfo.c
    create mode 100644 include/linux/cacheinfo.h

    --
    1.8.3.2



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