On 09/03/14 10:00, Sudeep Holla wrote: > From: Sudeep Holla <sudeep.ho...@arm.com> > > This patch adds initial support for providing processor cache information > to userspace through sysfs interface. This is based on already existing > implementations(x86, ia64, s390 and powerpc) and hence the interface is > intended to be fully compatible. > > The main purpose of this generic support is to avoid further code > duplication to support new architectures and also to unify all the existing > different implementations. > > This implementation maintains the hierarchy of cache objects which reflects > the system's cache topology. Cache devices are instantiated as needed as > CPUs come online. The cache information is replicated per-cpu even if they are > shared. A per-cpu array of cache information maintained is used mainly for > sysfs-related book keeping. > > It also implements the shared_cpu_map attribute, which is essential for > enabling both kernel and user-space to discover the system's overall cache > topology. > > This patch also add the missing ABI documentation for the cacheinfo sysfs > interface already, which is well defined and widely used. > > Signed-off-by: Sudeep Holla <sudeep.ho...@arm.com> > Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org> > Cc: Stephen Boyd <sb...@codeaurora.org> > Cc: linux-...@vger.kernel.org > Cc: linux...@de.ibm.com > Cc: linux-arm-ker...@lists.infradead.org > Cc: linux-i...@vger.kernel.org > Cc: linuxppc-dev@lists.ozlabs.org > Cc: linux-s...@vger.kernel.org > Cc: x...@kernel.org >
Reviewed-by: Stephen Boyd <sb...@codeaurora.org> Tested-by: Stephen Boyd <sb...@codeaurora.org> -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
