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 09:28:52 -0500
From:   Danny Tsen <dtsen@...ux.ibm.com>
To:     Michael Ellerman <mpe@...erman.id.au>, 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
Subject: Re: [PATCH v2] crypto: vmx: Improved AES/XTS performance of 6-way
 unrolling for ppc.

Still waiting for the CCLA to send to Openssl.

Thanks.

-Danny

On 9/15/23 8:29 AM, Michael Ellerman wrote:
> 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