crypto: caam - make write transactions bufferable on PPC platforms

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commit e7a7104e43 upstream.

Previous change (see "Fixes" tag) to the MCFGR register
clears AWCACHE[0] ("bufferable" AXI3 attribute) (which is "1" at POR).

This makes all writes non-bufferable, causing a ~ 5% performance drop
for PPC-based platforms.

Rework previous change such that MCFGR[AWCACHE]=4'b0011
(bufferable + cacheable) for all platforms.
Note: For ARM-based platforms, AWCACHE[0] is ignored
by the interconnect IP.

Fixes: f109674951 ("crypto: caam - fix snooping for write transactions")
Signed-off-by: Horia Geant? <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Horia Geant? 2016-01-12 17:59:29 +02:00 • committed by Greg Kroah-Hartman

parent 3dd3e2544c

commit 2a6c3d5457

1 changed files with 2 additions and 2 deletions

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drivers/crypto/caam/ctrl.c

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