linux-kernel - Re: [PATCH v2 1/5] crypto: Multi-buffer encryptioin infrastructure support

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Message-ID: <20151117130633.GB8032@gondor.apana.org.au>
Date:	Tue, 17 Nov 2015 21:06:33 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Tim Chen <tim.c.chen@...ux.intel.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	"David S.Miller" <davem@...emloft.net>,
	Stephan Mueller <smueller@...onox.de>,
	Chandramouli Narayanan <mouli_7982@...oo.com>,
	Vinodh Gopal <vinodh.gopal@...el.com>,
	James Guilford <james.guilford@...el.com>,
	Wajdi Feghali <wajdi.k.feghali@...el.com>,
	Jussi Kivilinna <jussi.kivilinna@....fi>,
	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/5] crypto: Multi-buffer encryptioin infrastructure
 support

On Thu, Oct 29, 2015 at 03:21:03PM -0700, Tim Chen wrote:
> 
> c) Add support to crypto scatterwalk support that can sleep during
> encryption operation, as we may have buffers for jobs in data lanes
> that are half-finished, waiting for additional jobs to come to fill
> empty lanes before we start the encryption again.  Therefore, we need to
> enhance crypto walk with the option to map data buffers non-atomically.
> This is done by algorithms run from crypto daemon who knows it is safe
> to do so as it can save and restore FPU state in correct context.

What about the existing ablkcipher scatterwalk helpers?

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
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