From mboxrd@z Thu Jan 1 00:00:00 1970 From: f.fainelli@gmail.com (Florian Fainelli) Date: Wed, 18 Jan 2017 12:29:19 -0800 Subject: [PATCH 0/7] ARM: Broadcom Brahma-B15 readahead cache support Message-ID: <20170118202927.28740-1-f.fainelli@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi all, This patch series adds support for the Broadcom Brahma-B15 readahead cache. I submitted that patch series a couple of years ago, and then slept on it so here is another stab at it. Note that we did not implement this cache as a version of an outer cache for several reasons: - we initially thought we needed to intercept flush_icache_all and flush_kern_cache_louis but upon further inspection we convinced ourselves this is no longer needed, still, flush_cache_all() needs special handling here and needs to wrap around - the outer cache does not allow differentiating a DMA transfer direction this is a readahead cache, so it does not participate in writes, flushing it during reads *and* writes kills the performance - finally, most operations that outer_cache cares about are on MVA, which is transparent to the readahead cache here Florian Fainelli (8): ARM: v7: allow setting different cache functions ARM: Add Broadcom Brahma-B15 readahead cache support ARM: Hook B15 readahead cache functions based on processor ARM: B15: Add CPU hotplug awareness ARM: B15: Add suspend/resume hooks ARM: B15: Register reboot notifier for KEXEC MAINTAINERS: Update brcmstb entries to cover B15 code MAINTAINERS | 2 + arch/arm/include/asm/glue-cache.h | 4 + arch/arm/include/asm/hardware/cache-b15-rac.h | 10 + arch/arm/mm/Kconfig | 8 + arch/arm/mm/Makefile | 1 + arch/arm/mm/cache-b15-rac.c | 360 ++++++++++++++++++++++++++ arch/arm/mm/cache-v7.S | 21 ++ arch/arm/mm/proc-v7.S | 6 +- include/linux/cpuhotplug.h | 2 + 10 files changed, 411 insertions(+), 4 deletions(-) create mode 100644 arch/arm/include/asm/hardware/cache-b15-rac.h create mode 100644 arch/arm/mm/cache-b15-rac.c -- 2.9.3