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

- From: Danny Tsen \<hidden\>
- Date: 2023-09-15 11:24:02 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2023/09/2336103
- Thread: https://ratatoskr.run/linux-crypto/2023/08/2319861/t.md

```text
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 <redacted>
>> ---
>>   drivers/crypto/vmx/aesp8-ppc.pl | 141 +++++++++++++++++++++-----------
>>   1 file changed, 92 insertions(+), 49 deletions(-)
> Patch applied.  Thanks.
```