Revert arm64 cache geometry
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Cover letter [PATCH 0/3] Revert arm64 cache geometry
Quoted 1 line · Catalin Marinas
On Thu, Oct 29, 2015 at 11:03:27PM +0000, Alexander Van Brunt wrote:
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Quoted 6 lines
BTW, it looks like I don't get any cache information on Juno with 4.3-rc7, it says "Unable to detect cache hierarchy from DT for CPU 0". I thought the point of the patch you are trying to revert was to parse this information from the hardware registers. Sudeep, any idea?
Yes you need to have updated DT from the mainline. Since the architecture doesn't provide any way of detecting the cpus sharing particular cache, we get that information from DT.
If DT lacks that info we don't expose any information. It would be wrong to say that a shared cache is shared by all the cpus in the system. DT check was added explicitly to avoid that.
Signature · 2 lines
Regards, Sudeep