Commit d66f99bc authored Aug 19, 2016 by Paul Burton Committed by Ralf Baechle Jan 03, 2017

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



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>

parent 819da1ea

arch/mips/mm/c-r4k.c

+4 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1497,6 +1497,10 @@ static void probe_pcache(void)
	c->dcache.flags \|= MIPS_CACHE_ALIASES;		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()) {		switch (current_cpu_type()) {
	case CPU_20KC:		case CPU_20KC:
	/*		/*