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From: Mike Rapoport <rppt@kernel.org>
To: Martin Fernandez <martin.fernandez@eclypsium.com>
Cc: linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org,
	platform-driver-x86@vger.kernel.org, linux-mm@kvack.org,
	tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
	dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
	ardb@kernel.org, dvhart@infradead.org, andy@infradead.org,
	gregkh@linuxfoundation.org, rafael@kernel.org,
	akpm@linux-foundation.org, daniel.gutson@eclypsium.com,
	hughsient@gmail.com, alex.bazhaniuk@eclypsium.com,
	alison.schofield@intel.com, keescook@chromium.org
Subject: Re: [PATCH v6 6/6] drivers/node: Show in sysfs node's crypto capabilities
Date: Fri, 4 Feb 2022 15:37:56 +0200	[thread overview]
Message-ID: <Yf0sNKu1vJkIRAA3@kernel.org> (raw)
In-Reply-To: <CAKgze5YZF09F3FTwD6kODd2RrWATutcmM5J7-wcLTK32C6aptg@mail.gmail.com>

On Fri, Feb 04, 2022 at 09:27:42AM -0300, Martin Fernandez wrote:
> On 2/4/22, Mike Rapoport <rppt@kernel.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?

AFAIU, s390 and powerpc have memory encryption capabilities, I don't know
the details though. 

-- 
Sincerely yours,
Mike.

      reply	other threads:[~2022-02-04 13:38 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-03 16:43 [PATCH v6 0/6] x86: Show in sysfs if a memory node is able to do encryption Martin Fernandez
2022-02-03 16:43 ` [PATCH v6 1/6] mm/memblock: Tag memblocks with crypto capabilities Martin Fernandez
2022-02-03 18:07   ` Mike Rapoport
2022-02-03 18:24     ` Martin Fernandez
2022-02-07 21:18   ` Kees Cook
2022-02-08 14:39     ` Martin Fernandez
2022-02-03 16:43 ` [PATCH v6 2/6] mm/mmzone: Tag pg_data_t " Martin Fernandez
2022-02-07 21:19   ` Kees Cook
2022-02-03 16:43 ` [PATCH v6 3/6] x86/e820: Refactor range_update and range_remove Martin Fernandez
2022-02-07 21:45   ` Kees Cook
2022-02-08  8:40     ` Mike Rapoport
2022-02-08 21:01       ` Martin Fernandez
2022-02-15  7:10         ` Mike Rapoport
2022-02-15 14:14           ` Martin Fernandez
2022-02-08 21:09     ` Martin Fernandez
2022-03-04 20:32     ` Martin Fernandez
2022-02-08 21:04   ` Daniel Gutson
2022-02-03 16:43 ` [PATCH v6 4/6] x86/e820: Tag e820_entry with crypto capabilities Martin Fernandez
2022-02-07 21:56   ` Kees Cook
2022-02-08 14:46     ` Martin Fernandez
2022-02-03 16:43 ` [PATCH v6 5/6] x86/efi: Tag e820_entries as crypto capable from EFI memmap Martin Fernandez
2022-02-03 16:43 ` [PATCH v6 6/6] drivers/node: Show in sysfs node's crypto capabilities Martin Fernandez
2022-02-04  3:47   ` Limonciello, Mario
2022-02-04 13:21     ` Martin Fernandez
2022-02-04 15:59       ` Tom Lendacky
2022-02-04 16:23         ` Limonciello, Mario
2022-02-04 16:28           ` Borislav Petkov
2022-02-04 17:12             ` Tom Lendacky
2022-02-04 17:49               ` Limonciello, Mario
2022-02-04 18:00               ` Borislav Petkov
2022-02-04 18:49                 ` Tom Lendacky
2022-02-04 21:49                   ` Borislav Petkov
2022-02-07  3:39             ` Kees Cook
2022-02-07 10:02               ` Borislav Petkov
2022-02-04  4:56   ` Mike Rapoport
2022-02-04 12:27     ` Martin Fernandez
2022-02-04 13:37       ` Mike Rapoport [this message]

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