# Re: \[PATCH v2\] crypto: vmx: Improved AES/XTS performance of 6-way unrolling for ppc.

- From: Michael Ellerman \<mpe@ellerman.id.au\>
- Date: 2023-09-15 13:29:50 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2023/09/2336255
- Thread: https://ratatoskr.run/linux-crypto/2023/08/2319861/t.md

```text
Danny Tsen [ref] writes:
> Improve AES/XTS performance of 6-way unrolling for PowerPC up
> to 17% with tcrypt.  This is done by using one instruction,
> vpermxor, to replace xor and vsldoi.
>
> The same changes were applied to OpenSSL code and a pull request was
> submitted.

https://github.com/openssl/openssl/pull/21812

Still unmerged as of today.

cheers
```