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MIPS: c-r4k: Treat physically indexed dcaches as not aliasing

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Physically indexed caches cannot suffer from virtual aliasing, so clear
the MIPS_CACHE_ALIASES bit in order to ensure we don't do extra work
avoiding aliasing that cannot happen.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14017/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2016-08-19 18:13:35 +01:00 committed by Ralf Baechle
parent 819da1ead1
commit d66f99bc46
1 changed files with 4 additions and 0 deletions
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4
arch/mips/mm/c-r4k.c
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@ -1497,6 +1497,10 @@ static void probe_pcache(void)
c->dcache.flags |= MIPS_CACHE_ALIASES;
}
/* Physically indexed caches don't suffer from virtual aliasing */
if (c->dcache.flags & MIPS_CACHE_PINDEX)
c->dcache.flags &= ~MIPS_CACHE_ALIASES;
switch (current_cpu_type()) {
case CPU_20KC:
/*