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crypto: testmgr - Add a flag allowing the self-tests to be disabled at runtime. 

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.

However if fips=1 as well, we ignore this flag as FIPS mode mandates
that the self-tests are run.

Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Richard W.M. Jones 2016-05-03 10:00:17 +01:00 committed by Herbert Xu
parent bc197b2a9c
commit 9e5c9fe4cb
2 changed files with 12 additions and 0 deletions
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3
Documentation/kernel-parameters.txt
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@ -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 It will be ignored when crashkernel=X,high is not used
or memory reserved is below 4G. or memory reserved is below 4G.
cryptomgr.notests
[KNL] Disable crypto self-tests
cs89x0_dma= [HW,NET] cs89x0_dma= [HW,NET]
Format: <dma> Format: <dma>

9
crypto/testmgr.c
View File

@ -35,6 +35,10 @@
#include "internal.h" #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 #ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS
/* a perfect nop */ /* a perfect nop */
@ -3868,6 +3872,11 @@ int alg_test(const char *driver, const char *alg, u32 type, u32 mask)
int j; int j;
int rc; int rc;
if (!fips_enabled && notests) {
printk_once(KERN_INFO "alg: self-tests disabled\n");
return 0;
}
alg_test_descs_check_order(); alg_test_descs_check_order();
if ((type & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_CIPHER) { if ((type & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_CIPHER) {