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 <rjo...@redhat.com>
> ---
> 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: <dma>
>
> 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 große Räuberbande? |
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