Misc ARM optimizations
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Cover letter [PATCH v2 0/2] Misc ARM optimizations
Quoted 5 lines · Thomas Petazzoni
Here is a set of two patches that I already sent on March 2015 (first patch) and June 2015 (second patch).
The first patch hasn't gotten any feedback.
Quoted 8 lines
The second patch received some feedback: Russell said he would like this to be merged at the beginning of a cycle, to give it enough time for testing. And we are precisely at the beginning of a cycle :-) Rob Herring had some comments, which I also addressed in a reply.
Would it be possible to either get those patches merged, or a decision be taken that they are not acceptable, so that I can stop worrying about them ? :-)
There's a PL310 erratum [(729806) Speculative reads from the Cortex-A9 MPCore processor can cause deadlock] that requires both speculative linefills and L1 prefetch to be disabled, otherwise there is scope for deadlock.
So, these need to be predicated on a Kconfig option if nothing else, otherwise we may run into nasty regressions on things like OMAP4 (and anything else with PL310 r3p0 afaict).
Will