linux-kernel - Re: [PATCH v8 3/3] crypto: Add Inside Secure SafeXcel EIP-93 crypto engine support

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Message-ID: <Z1od3fgP02ay88Wy@gondor.apana.org.au>
Date: Thu, 12 Dec 2024 07:18:53 +0800
From: Herbert Xu <herbert@...dor.apana.org.au>
To: Christian Marangi <ansuelsmth@...il.com>
Cc: "David S. Miller" <davem@...emloft.net>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Antoine Tenart <atenart@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
	Waiman Long <longman@...hat.com>, Boqun Feng <boqun.feng@...il.com>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>, linux-crypto@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	llvm@...ts.linux.dev, upstream@...oha.com,
	Richard van Schagen <vschagen@...oud.com>
Subject: Re: [PATCH v8 3/3] crypto: Add Inside Secure SafeXcel EIP-93 crypto
 engine support

On Wed, Dec 11, 2024 at 12:40:09PM +0100, Christian Marangi wrote:
>
> Just to make sure, this is only limited to DMA or it's also problematic
> to the block list? Aka NO FREE should be done in export or NO DMA FREE
> should be done in export?

It's all resources.

The user does not have to call export, final or finup.  The request
object can be freed directly at any time after a call.  So you can
never hold any resources in the request object between calls.

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