Re: [PATCH v2 1/2] crypto: caam - make write transactions bufferable on PPC platforms
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: 2016-01-25 13:59:32
Also in:
stable
On Tue, Jan 12, 2016 at 05:59:29PM +0200, Horia Geantă wrote:
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.
Cc: <redacted> # 4.3+
Fixes: f10967495144 ("crypto: caam - fix snooping for write transactions")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>Patch applied. Thanks! -- Email: Herbert Xu [off-list ref] Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt