From: Krzysztof Kozlowski Subject: Re: [PATCH 2/2] crypto: s5p-sss - Handle unaligned buffers Date: Mon, 07 Mar 2016 12:59:46 +0900 Message-ID: <56DCFCB2.2090409@samsung.com> References: <1457259436-32560-1-git-send-email-krzk@kernel.org> <1457259436-32560-2-git-send-email-krzk@kernel.org> <56DCD938.7090100@mleia.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit To: Vladimir Zapolskiy , Krzysztof Kozlowski , Herbert Xu , "David S. Miller" , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org Return-path: In-reply-to: <56DCD938.7090100@mleia.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org On 07.03.2016 10:28, Vladimir Zapolskiy wrote: > Hi Krzysztof, > > On 06.03.2016 12:17, Krzysztof Kozlowski wrote: >> During crypto selftests on Odroid XU3 (Exynos5422) some of the >> algorithms failed because of passing AES-block unaligned source and >> destination buffers: > > excuse my ignorance what are the crypto selftests you reference? Are they > run-time self tests run by crypto manager on algorithm registration? Yes, these tests. Disabled by CRYPTO_MANAGER_DISABLE_TESTS. > >> alg: skcipher: encryption failed on chunk test 1 for ecb-aes-s5p: ret=22 >> >> Handle such case by copying the buffers to a new aligned and contiguous >> space. > > I'm not quite convinced that a particular crypto accelerator driver > is the right place for this change, at least I don't see in the change > anything S5P-SSS specific, but it might be good to add the change. The driver sets a .cra_alignmask but docs are saying that re-alignment by crypto API might not happen. And in fact for selftets the data was coming sometimes not-aligned. On the other hand the CRYPTO_TEST was providing aligned data. > > Briefly looking at other drivers similarly atmel-* and omap-* have > slow path fallbacks, ./rockchip/rk3288_crypto_ablkcipher.c fails like > s5p-sss etc. Yes, I was kind of inspired by the omap solution. > Anyway since it is a valid improvement, please feel free to add my > > Acked-by: Vladimir Zapolskiy Thanks! Krzysztof > >> Signed-off-by: Krzysztof Kozlowski >> --- >> drivers/crypto/s5p-sss.c | 149 +++++++++++++++++++++++++++++++++++++++++++---- >> 1 file changed, 137 insertions(+), 12 deletions(-) >>