linux-kernel - Re: [PATCH v6 6/6] drivers/node: Show in sysfs node's crypto capabilities

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Message-ID: <CAKgze5YZF09F3FTwD6kODd2RrWATutcmM5J7-wcLTK32C6aptg@mail.gmail.com>
Date:   Fri, 4 Feb 2022 09:27:42 -0300
From:   Martin Fernandez <martin.fernandez@...ypsium.com>
To:     Mike Rapoport <rppt@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
        platform-driver-x86@...r.kernel.org, linux-mm@...ck.org,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        ardb@...nel.org, dvhart@...radead.org, andy@...radead.org,
        gregkh@...uxfoundation.org, rafael@...nel.org,
        akpm@...ux-foundation.org, daniel.gutson@...ypsium.com,
        hughsient@...il.com, alex.bazhaniuk@...ypsium.com,
        alison.schofield@...el.com, keescook@...omium.org
Subject: Re: [PATCH v6 6/6] drivers/node: Show in sysfs node's crypto capabilities

On 2/4/22, Mike Rapoport <rppt@...nel.org> wrote:
> On Thu, Feb 03, 2022 at 01:43:28PM -0300, Martin Fernandez wrote:
>> +Description:
>> +		This value is 1 if all system memory in this node is
>> +		marked with EFI_MEMORY_CPU_CRYPTO, indicating that the
>
> It didn't jump at me at previous postings, but other architectures won't
> necessary have EFI_MEMORY_CPU_CRYPTO marking crypto-capable memory.
>
> How about
>
>   This value is 1 if all system memory in this node is capable of being
>   protected with the CPU's memory cryptographic capabilities. It is 0
>   otherwise.
>   On EFI architectures with value corresponds to EFI_MEMORY_CPU_CRYPTO.
>
>

Yes, sounds good to me.

Is there other architecture with something similar to this? Or are you
thinking on the possibility of such architecture?