Messages in this thread | | | Subject | Re: [patch 5/6] ps3: BD/DVD/CD-ROM Storage Driver | From | Benjamin Herrenschmidt <> | Date | Sat, 14 Jul 2007 09:12:08 +1000 |
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On Fri, 2007-07-13 at 16:19 +0200, Arnd Bergmann wrote: > I'm pretty sure that no ppc64 machine needs alias resolution in the kernel, > although some are VIPT. Last time we discussed this, Segher explained it > to me, but I don't remember which way Cell does it. IIRC, it automatically > flushes cache lines that are accessed through aliases.
Ah yes, I remember reading about this automatic flushing thing. I don't know how the caches actually work on most of our PPC's, but the fact is, we don't have aliasing issues, so I can safely ignore it for a bit longer :-)
There are some aliasing issues with the instruction cache specifically on some 4xx models but that's irrelevant to this discussion (and I think we handle them elsewhere anyway).
Ben.
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