Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752908AbcD2LAI (ORCPT ); Fri, 29 Apr 2016 07:00:08 -0400 Received: from mail.eperm.de ([89.247.134.16]:54184 "EHLO mail.eperm.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751834AbcD2LAE convert rfc822-to-8bit (ORCPT ); Fri, 29 Apr 2016 07:00:04 -0400 From: Stephan Mueller To: "Richard W.M. Jones" Cc: linux-kernel@vger.kernel.org, corbet@lwn.net, herbert@gondor.apana.org.au, davem@davemloft.net, linux-doc@vger.kernel.org, linux-crypto@vger.kernel.org Subject: Re: [PATCH] crypto: Add a flag allowing the self-tests to be disabled at runtime. Date: Fri, 29 Apr 2016 12:59:57 +0200 Message-ID: <1716181.h8M5zx62aT@tauon.atsec.com> User-Agent: KMail/4.14.10 (Linux/4.4.7-300.fc23.x86_64; KDE/4.14.18; x86_64; ; ) In-Reply-To: <1461924463-1678-2-git-send-email-rjones@redhat.com> References: <1461924463-1678-1-git-send-email-rjones@redhat.com> <1461924463-1678-2-git-send-email-rjones@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="iso-8859-1" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2035 Lines: 69 Am Freitag, 29. April 2016, 11:07:43 schrieb Richard W.M. Jones: Hi Richard, > Running self-tests for a short-lived KVM VM takes 28ms on my laptop. > This commit adds a flag 'cryptomgr.notests' which allows them to be > disabled. > > Signed-off-by: Richard W.M. Jones > --- > Documentation/kernel-parameters.txt | 3 +++ > crypto/testmgr.c | 9 +++++++++ > 2 files changed, 12 insertions(+) > > diff --git a/Documentation/kernel-parameters.txt > b/Documentation/kernel-parameters.txt index 0b3de80..d4d5fb7 100644 > --- a/Documentation/kernel-parameters.txt > +++ b/Documentation/kernel-parameters.txt > @@ -826,6 +826,9 @@ bytes respectively. Such letter suffixes can also be > entirely omitted. It will be ignored when crashkernel=X,high is not used > or memory reserved is below 4G. > > + cryptomgr.notests > + [KNL] Disable crypto self-tests > + > cs89x0_dma= [HW,NET] > Format: > > diff --git a/crypto/testmgr.c b/crypto/testmgr.c > index b86883a..dc613f2 100644 > --- a/crypto/testmgr.c > +++ b/crypto/testmgr.c > @@ -35,6 +35,10 @@ > > #include "internal.h" > > +static bool notests; > +module_param(notests, bool, 0644); > +MODULE_PARM_DESC(notests, "disable crypto self-tests"); > + > #ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS > > /* a perfect nop */ > @@ -3868,6 +3872,11 @@ int alg_test(const char *driver, const char *alg, u32 > type, u32 mask) int j; > int rc; > > + if (notests) { What about if (!fips_enabled && notests) ? I am not sure whether the kernel should prevent mistakes in user space. A mistake would be when setting fips=1 and notests=1 as the FIPS mode mandates the self tests. > + pr_info("alg: self-tests disabled\n"); > + return 0; > + } > + > alg_test_descs_check_order(); > > if ((type & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_CIPHER) { Ciao Stephan -- | Nimm das Recht weg - | | was ist dann der Staat noch anderes als eine gro?e R?uberbande? |