The newly-released kernel v2.6.32-504.23.4.el6 includes the back-ported SHA256-SSSE3 driver.
Why is the generic version of the SHA256 driver selected at runtime instead of the SSSE3 version on this x86_64 system?
Yes, my CPU does support the SSSE3 instruction set, and the use of SHA256 is invoked by the LUKS "cipher=aes-cbc-essiv:sha256" option.
On the running system I see that the sha256-ssse3 driver is not loaded. Further evidence that the generic driver is in use:
# grep sha256 /proc/crypto
name : sha256
driver : sha256-generic
So... what's the trick to using the sha256-ssse3 driver instead of the generic driver?
Thanks.
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