From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754432AbaBSQGp (ORCPT ); Wed, 19 Feb 2014 11:06:45 -0500 Received: from fw-tnat.cambridge.arm.com ([217.140.96.21]:51323 "EHLO cam-smtp0.cambridge.arm.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754316AbaBSQGl (ORCPT ); Wed, 19 Feb 2014 11:06:41 -0500 From: Sudeep Holla To: linux-kernel@vger.kernel.org Cc: sudeep.holla@arm.com, Greg Kroah-Hartman , linux-ia64@vger.kernel.org, linux390@de.ibm.com, linux-s390@vger.kernel.org, x86@kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH RFC/RFT v3 0/9] drivers: cacheinfo support Date: Wed, 19 Feb 2014 16:06:07 +0000 Message-Id: <1392825976-17633-1-git-send-email-sudeep.holla@arm.com> X-Mailer: git-send-email 1.8.3.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sudeep Holla 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 v2[2]->v3: - Added new class "cpu" to group all cpu devices - Converted all "raw" kobjects used in cacheinfo to device_attr by creating cache index devices - Added back s390 show_cacheinfo for /proc/cpuinfo - Added disable_sysfs to cache_info for preventing a cache node to be exposed through sysfs if required(used on s390) Changes v1[1]->v2[2]: - 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 [1] https://lkml.org/lkml/2014/1/8/523 [2] https://lkml.org/lkml/2014/2/7/654 Cc: Greg Kroah-Hartman Cc: linux-ia64@vger.kernel.org Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org Cc: x86@kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-arm-kernel@lists.infradead.org --- Sudeep Holla (9): drivers: base: add new class "cpu" to group 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 | 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 | 831 +++------------------ arch/powerpc/kernel/cacheinfo.h | 8 - arch/powerpc/kernel/sysfs.c | 4 - arch/s390/kernel/cache.c | 388 +++------- arch/x86/kernel/cpu/intel_cacheinfo.c | 647 ++++------------ drivers/base/Makefile | 2 +- drivers/base/cacheinfo.c | 485 ++++++++++++ drivers/base/core.c | 35 +- drivers/base/cpu.c | 7 + include/linux/cacheinfo.h | 55 ++ include/linux/cpu.h | 2 + 22 files changed, 1523 insertions(+), 1855 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