From: Sudeep Holla <sudeep.holla@xxxxxxx>
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 tested on x86.
This series also adds support for ARM and ARM64 architectures based on
the generic support.
The code can be fetched from:
git://linux-arm.org/linux-skn cacheinfo
Changes v3->v4:
- since userspace tools can't handle class and bus with same name,
removed creating new cpu class and reused existing cpu bus with
new cpu_device_create function
- (no changes in the arch specific port)
Changes v2->v3:
- Added {allocation,write}_policy instead of single attributes sysfs
(attributes retained on ia64 privately as it was used only on that)
- factored out show_cpumap into separate helper in cpumask.h
- populate cpu_{map,list} for non-DT system if they are not populated
by arch specific callbacks
- removed use of sysfs *_show callback in cache_attrs_is_visible
- all the review comments from Stephen Boyd implemented
Changes v1->v2:
- removed custom device_{add,remove}_attrs, using is_visible callback
instead(suggested by GregKH)
- arm64: changes as per MarkR review comments
- Moved smp_call_function_single to architectures using it(arm, arm64,
x86) (suggested by Stephen Boyd)
- arm (mostly changes as per RMK's review comments)
- fixed to allow v7 + v6 build
- l2 cache changes to remove extra structure
- populated CTR for few StrongARM CPU's not implementing CTR
Regards,
Sudeep
[v1] https://lkml.org/lkml/2014/6/25/603
[v2] https://lkml.org/lkml/2014/7/25/467
[v3] https://lkml.org/lkml/2014/8/21/175
Cc: linux-ia64@xxxxxxxxxxxxxxx
Cc: linux390@xxxxxxxxxx
Cc: linux-s390@xxxxxxxxxxxxxxx
Cc: x86@xxxxxxxxxx
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Sudeep Holla (11):
cpumask: factor out show_cpumap into separate helper function
topology: replace custom attribute macros with standard DEVICE_ATTR*
drivers: base: add cpu_device_create to support per-cpu devices
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 | 47 ++
arch/arm/include/asm/outercache.h | 9 +
arch/arm/kernel/Makefile | 1 +
arch/arm/kernel/cacheinfo.c | 287 ++++++++
arch/arm/mm/Kconfig | 13 +
arch/arm/mm/cache-l2x0.c | 35 +-
arch/arm/mm/cache-tauros2.c | 36 +
arch/arm/mm/cache-xsc3l2.c | 17 +
arch/arm64/kernel/Makefile | 2 +-
arch/arm64/kernel/cacheinfo.c | 142 ++++
arch/ia64/kernel/topology.c | 421 +++--------
arch/powerpc/kernel/cacheinfo.c | 812 +++------------------
arch/powerpc/kernel/cacheinfo.h | 8 -
arch/powerpc/kernel/sysfs.c | 12 +-
arch/s390/kernel/cache.c | 388 +++-------
arch/x86/kernel/cpu/intel_cacheinfo.c | 709 +++++-------------
arch/x86/kernel/cpu/perf_event_amd_iommu.c | 5 +-
arch/x86/kernel/cpu/perf_event_amd_uncore.c | 6 +-
arch/x86/kernel/cpu/perf_event_intel_rapl.c | 6 +-
arch/x86/kernel/cpu/perf_event_intel_uncore.c | 6 +-
drivers/acpi/acpi_pad.c | 6 +-
drivers/base/Makefile | 2 +-
drivers/base/cacheinfo.c | 541 ++++++++++++++
drivers/base/cpu.c | 59 +-
drivers/base/node.c | 14 +-
drivers/base/topology.c | 71 +-
drivers/pci/pci-sysfs.c | 39 +-
include/linux/cacheinfo.h | 100 +++
include/linux/cpu.h | 4 +
include/linux/cpumask.h | 27 +
30 files changed, 1840 insertions(+), 1985 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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