Am Mittwoch, 13. November 2019, 07:02:40 CET schrieb Alexander E. Patrakov: Hi Alexander, > ср, 13 нояб. 2019 г. в 05:38, Stephan Müller <smueller@xxxxxxxxxx>: > > Am Dienstag, 12. November 2019, 20:58:32 CET schrieb Alexander E. > > Patrakov: > > > > Hi Alexander, > > > > > > +config LRNG_HEALTH_TESTS > > > > + bool "Enable noise source online health tests" > > > > + help > > > > + The online health tests validate the noise source at > > > > + runtime for fatal errors. These tests include SP800-90B > > > > + compliant tests which are invoked if the system is booted > > > > + with fips=1. In case of fatal errors during active > > > > + SP800-90B tests, the issue is logged and the noise > > > > + data is discarded. These tests are required for full > > > > + compliance with SP800-90B. > > > > > > How have you tested that these tests work at runtime? Maybe add some > > > code under a new CONFIG item that depends on CONFIG_BROKEN that > > > deliberately botches the RNG and triggers failures? > > > > I am unable to find sensible information about CONFIG_BROKEN in the recent > > kernel tree. > > > > Do you happen to have a pointer on how that option is to be used? > > This option is not used on its own. You create a new option, > CONFIG_TEST_LRNG_FAILURE_MODE or something like that, and put your > code under the ifdef guarded by that option. And then, to prevent > ordinary users and allyesconfig from selecting it, in Kconfig you say: > "depends on BROKEN". This way, the option becomes unselectable in > menuconfig but still works as intended when added manually to .config > (obviously, with the BROKEN dependency removed locally). > > Definition: > https://github.com/torvalds/linux/blob/9c7db5004280767566e91a33445bf93aa479 > ef02/init/Kconfig#L68 Example usage: > https://github.com/torvalds/linux/blob/c87237110f2553b4200a8b3401a01198edfc > f0d9/drivers/gpu/drm/i915/Kconfig.debug#L166 I added such support to the LRNG. Thank you for your suggestion. > > -- > Alexander E. Patrakov Ciao Stephan
