[gnutls-help] Support for via quadcore SHA512 hw acceleration

Nikos Mavrogiannopoulos nmav at gnutls.org
Sun Apr 21 12:20:32 CEST 2013

On Sat, Apr 20, 2013 at 8:48 PM, Shaun Murphy <shaunmurphy at outlook.com> wrote:
> The limited literature for the newer VIA QuadCore E-Series embedded platform
> says that it now supports "Secure Hash Algorithm: SHA-1, SHA-256, SHA-384,
> SHA-512" but I'm not seeing any acceleration for SHA512 in the kernel
> modules or gnutls. I would appreciate some pointers on what I need to do to
> access that SHA512 acceleration in gnutls.

Hello Shaun,
 I am not aware of this kind of CPUs. Do they use similar instructions
and detection as in nano? If yes, the current detection mechanism is
in lib/accelerated/x86/aes-padlock.c in check_phe_sha512() function.
It could be that a different capability bit is now enabled.


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