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All of the VMX AES ciphers (AES, AES-CBC and AES-CTR) are set at
priority 1000. Unfortunately this means we never use AES-CBC and
AES-CTR, because the base AES-CBC cipher that is implemented on
top of AES inherits its priority.
To fix this, AES-CBC and AES-CTR have to be a higher priority. Set
them to 2000.
Testing on a POWER8 with:
cryptsetup benchmark --cipher aes --key-size 256
Shows decryption speed increase from 402.4 MB/s to 3069.2 MB/s,
over 7x faster. Thanks to Mike Strosaker for helping me debug
this issue.
Fixes:
|
||
---|---|---|
.. | ||
aes_cbc.c | ||
aes_ctr.c | ||
aes.c | ||
aesp8-ppc.h | ||
aesp8-ppc.pl | ||
ghash.c | ||
ghashp8-ppc.pl | ||
Kconfig | ||
Makefile | ||
ppc-xlate.pl | ||
vmx.c |