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

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Date:   Fri, 15 Sep 2023 23:29:33 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Danny Tsen <dtsen@...ux.ibm.com>, linux-crypto@...r.kernel.org
Cc:     herbert@...dor.apana.org.au, leitao@...ian.org,
        nayna@...ux.ibm.com, appro@...ptogams.org,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        ltcgcw@...ux.vnet.ibm.com, dtsen@...ibm.com,
        Danny Tsen <dtsen@...ux.ibm.com>
Subject: Re: [PATCH v2] crypto: vmx: Improved AES/XTS performance of 6-way
 unrolling for ppc.

Danny Tsen <dtsen@...ux.ibm.com> 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