netdev - Re: Using the aesni generic gcm(aes) aead in atomic context

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Message-ID: <20171031074438.GA26042@gondor.apana.org.au>
Date:   Tue, 31 Oct 2017 15:44:38 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Ilya Lesokhin <ilyal@...lanox.com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "sd@...asysnail.net" <sd@...asysnail.net>,
        Boris Pismenny <borisp@...lanox.com>,
        "davejwatson@...com" <davejwatson@...com>
Subject: Re: Using the aesni generic gcm(aes) aead in atomic context

On Tue, Oct 31, 2017 at 07:39:08AM +0000, Ilya Lesokhin wrote:
> 
> I think we should consider having a synchronous implementation that falls back
> to integer implementation when the FPU is not available.
> This would spare the users from having to handle the asynchronous case.
> 
> Hopefully the situation where the FPU is not available is rare enough 
> So it won't hurt the performance too much.

For your intended use case I think async processing should work just
fine as it does for IPsec.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt