On 07/14/2017 03:11 PM, Florian Fainelli wrote: > On 06/23/2017 10:52 AM, Florian Fainelli wrote: >> 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 be wrapped 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 completely >> >> - finally, most operations that outer_cache cares about are on MVA, which >> is transparent to the readahead cache here >> >> Changes in v2: >> >> - clarify that the read-ahead caches does invalidates on writes (IOW) based >> on Russell's feedback > > Any comments on this? Thank you.
Should I just go a ahead and queue these changes in Russell's patch tracker? > >> >> Florian Fainelli (7): >> 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 + >> 9 files changed, 411 insertions(+), 3 deletions(-) >> create mode 100644 arch/arm/include/asm/hardware/cache-b15-rac.h >> create mode 100644 arch/arm/mm/cache-b15-rac.c >> > > -- Florian
