Re: [PATCH v4 00/12] RISC-V: support some cryptography accelerations

Jerry Shih
2023-10-31T02:17:23Z

On Oct 7, 2023, at 03:47, Eric Biggers <ebiggers@kernel.org> wrote:
> On Fri, Sep 15, 2023 at 11:21:28AM +0800, Jerry Shih wrote:
>> On Sep 15, 2023, at 09:48, He-Jie Shih <bignose1007@gmail.com> wrote:
>>
>> The OpenSSL PR is at [1].
>> And we are from SiFive.
>>
>> -Jerry
>>
>> [1]
>> https://github.com/openssl/openssl/pull/21923
>
> Hi Jerry, I'm wondering if you have an update on this? Do you need any help?

The RISC-V vector crypto OpenSSL pr[1] is merged.
And we also sent the vector-crypto patch based on Heiko's and OpenSSL
works.
Here is the link:
https://lore.kernel.org/all/20231025183644.8735-1-jerry.shih@sifive.com/

[1]
https://github.com/openssl/openssl/pull/21923

> I'm also wondering about riscv.pm and the choice of generating the crypto
> instructions from .words instead of using the assembler. It makes it
> significantly harder to review the code, IMO. Can we depend on assembler
> support for these instructions, or is that just not ready yet?
>
> - Eric

There is no public assembler supports the vector-crypto asm mnemonics.
We should still use `opcode` for vector-crypto instructions. But we might
use asm for standard rvv parts.
In order to reuse the codes in OpenSSL as much as possible, we still use
the `riscv.pm` for all standard rvv and vector-crypto instructions. If the asm
mnemonic is still a better approach, I will `rewrite` all standard rvv parts
with asm mnemonics in next patch.

-Jerry