Hi Muller , Thanks for the information provided. I am little confused between current scenario (multiple threads will send multiple requests to crypto H/W) and export/import. Please can you let me know when export/imports can be used in real time? I Have seen many references of these method(export/import) in open source , but not really sure when its being used in real time. BR, Srisowj On Sat, Feb 21, 2015 at 1:07 AM, Stephan Mueller <smueller@xxxxxxxxxx> wrote: > Am Donnerstag, 19. Februar 2015, 21:48:30 schrieb sri sowj: > > Hi sri, > >> Hi , >> >> I am trying to understand Hashing Algorithms implementation in linux kernel >> . >> >> I am really not sure on how to deal with following scenario. >> >> assume when App1 is in middle of >> execution(crypto_ahash_init/update/update...) ,App2 sends a request >> may be from another cpu in multi-core system to underlying crypto >> driver . >> Then essentially input1 has to save its state(intermediate Hash) and >> serves App2 request. >> >> App1 ---------> Linux kernel crypto driver >> >> crypto_ahash_init(input1); >> crypto_ahash_update(input1); >> .................. >> .................. >> crypto_ahash_update(input1); // multple Hash requests >> .................. >> .................. >> crypto_ahash_final() >> >> >> >> App2 ---------> Linux kernel crypto driver >> >> crypto_ahash_init(input2); >> crypto_ahash_update(input2); >> >> >> Here in this scenario how to track,save and restore the Hash state for App1 >> ? > > The ahash (ablkcipher too) uses kernel threads. Those are scheduled like > normal processes, including the context switching. >> >> BR, >> Srisowj >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-crypto" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > > -- > Ciao > Stephan -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
