On Fri, Jan 15, 2021 at 04:14:40PM -0800, Dey, Megha wrote:
dm-verity only uses unkeyed hash algorithms. So no, it doesn't use GHASH.Hello Megha,AFAIK, dm-verity (authenticated but not encrypted file system) is one use
What is the purpose of this separate GHASH module? GHASH is only used
in combination with AES-CTR to produce GCM, and this series already
contains a GCM driver.
Do cores exist that implement PCLMULQDQ but not AES-NI?
If not, I think we should be able to drop this patch (and remove the
existing PCLMULQDQ GHASH driver as well)
case for authentication only.
Although I am not sure if GHASH is specifically used for this or SHA?
Also, I do not know of any cores that implement PCLMULQDQ and not AES-NI.
- Eric