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 06:23:25 -0500
From:   Danny Tsen <dtsen@...ux.ibm.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>
Cc:     linux-crypto@...r.kernel.org, leitao@...ian.org,
        nayna@...ux.ibm.com, appro@...ptogams.org,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        mpe@...erman.id.au, ltcgcw@...ux.vnet.ibm.com, dtsen@...ibm.com
Subject: Re: [PATCH v2] crypto: vmx: Improved AES/XTS performance of 6-way
 unrolling for ppc.

Thanks Herbert.

-Danny

On 9/15/23 5:41 AM, Herbert Xu wrote:
> On Wed, Aug 30, 2023 at 09:49:11AM -0400, Danny Tsen wrote:
>> 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.
>>
>> This patch has been tested with the kernel crypto module tcrypt.ko and
>> has passed the selftest.  The patch is also tested with
>> CONFIG_CRYPTO_MANAGER_EXTRA_TESTS enabled.
>>
>> Signed-off-by: Danny Tsen <dtsen@...ux.ibm.com>
>> ---
>>   drivers/crypto/vmx/aesp8-ppc.pl | 141 +++++++++++++++++++++-----------
>>   1 file changed, 92 insertions(+), 49 deletions(-)
> Patch applied.  Thanks.