linux-kernel - Re: [PATCH v6 11/12] crypto: x86/aes-kl - Support AES algorithm using Key Locker instructions

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Date:   Wed, 24 May 2023 10:18:20 -0700
From:   "Chang S. Bae" <chang.seok.bae@...el.com>
To:     Eric Biggers <ebiggers@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-crypto@...r.kernel.org>,
        <dm-devel@...hat.com>, <gmazyland@...il.com>, <luto@...nel.org>,
        <dave.hansen@...ux.intel.com>, <tglx@...utronix.de>, <bp@...e.de>,
        <mingo@...nel.org>, <x86@...nel.org>,
        <herbert@...dor.apana.org.au>, <ardb@...nel.org>,
        <dan.j.williams@...el.com>, <bernie.keany@...el.com>,
        <charishma1.gairuboyina@...el.com>,
        <lalithambika.krishnakumar@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        "Nathan Chancellor" <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>
Subject: Re: [PATCH v6 11/12] crypto: x86/aes-kl - Support AES algorithm using
 Key Locker instructions

On 5/8/2023 11:18 AM, Chang S. Bae wrote:
> 
> I thought this is something benign to stay here. But, yes, I agree that 
> it is better to simplify the code.

After staring at this a bit, I realized that at least the feature flag 
check needs to stay there. This can populate a proper error code when 
the feature abruptly gets disabled (most likely due to the backup failure).

Thanks,
Chang