Messages in this thread | | | Subject | Re: [RFC PATCH 00/20] x86/intel_rdt: Start abstraction for a second arch | From | James Morse <> | Date | Fri, 30 Nov 2018 19:23:38 +0000 |
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Hi Yury,
On 27/11/2018 12:33, Yury Norov wrote: > On Fri, Aug 24, 2018 at 11:44:59AM +0100, James Morse wrote: >> ARM have some upcoming CPU features that are similar to Intel RDT. Resctrl >> is the defacto ABI for this sort of thing, but it lives under arch/x86. >> >> To get existing software working, we need to make resctrl work with arm64. >> This series is the first chunk of that. The aim is to move the filesystem/ABI >> parts into /fs/resctrl, and implement a second arch backend. >> >> >> What are the ARM features? >> Future ARM SoCs may have a feature called MPAM: Memory Partitioning and >> Monitoring. This is an umbrella term like RDT, and covers a range of controls >> (like CAT) and monitors (like MBM, CMT).
>> This series is based on v4.18, and can be retrieved from: >> git://linux-arm.org/linux-jm.git -b mpam/resctrl_rework/rfc_1 > > Thank you a lot for this work on cache allocation. > > We are very interested in enabling CAT on Cavium / Marvell devices. > Could you please share another two series you mentioned above?
I'm working on assembling the whole thing as Fenghua asked, there should be a tree that shows the shape of the whole thing soon.
> Do you have a working ARM64 CAT driver? It will much help us in our > experimenting.
For moving the arch-independent parts to /fs/, I'm afraid its all-or-nothing. Abstracting just the 'CAT' parts will generate much more churn for both architectures.
Thanks,
James
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