linux-kernel - Re: [PATCH v3 10/10] crypto: virtio: Add ecb aes algo support

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Message-ID: <4ac7b5b9-d819-62b5-1425-0e0b07762120@loongson.cn>
Date: Wed, 10 Dec 2025 09:36:06 +0800
From: Bibo Mao <maobibo@...ngson.cn>
To: Eric Biggers <ebiggers@...nel.org>
Cc: Gonglei <arei.gonglei@...wei.com>, "Michael S . Tsirkin"
 <mst@...hat.com>, Jason Wang <jasowang@...hat.com>,
 Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, Eugenio Pérez
 <eperezma@...hat.com>, Herbert Xu <herbert@...dor.apana.org.au>,
 "David S. Miller" <davem@...emloft.net>, kvm@...r.kernel.org,
 linux-crypto@...r.kernel.org, virtualization@...ts.linux.dev,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 10/10] crypto: virtio: Add ecb aes algo support

On 2025/12/10 上午7:25, Eric Biggers wrote:
> On Tue, Dec 09, 2025 at 10:22:58AM +0800, Bibo Mao wrote:
>> ECB AES also is added here, its ivsize is zero and name is different
>> compared with CBC AES algo.
> 
> What is the use case for this feature?Currently qemu builtin backend and openssl afalg only support CBC AES, 
it depends on modified qemu and openssl to test this.

Maybe this patch adding ECB AES algo can be skipped now, it is just an 
example, the final target is to add SM4 cipher. currently virtio crypto 
has some problems such as:
1. there is RCU timeout issue with multiple AIO openssl processes
2. session number is limited with 256 so it is hard for actual use.

I want to solve these issues one by one.

Regards
Bibo Mao
> 
> - Eric
>