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From: Borislav Petkov <bp@alien8.de>
To: "Limonciello, Mario" <mario.limonciello@amd.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>,
	Martin Fernandez <martin.fernandez@eclypsium.com>,
	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,
	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, rppt@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 17:28:43 +0100	[thread overview]
Message-ID: <Yf1UO6jF91o9k4jB@zn.tnic> (raw)
In-Reply-To: <ec9e29a4-0d2b-1423-d92e-6f025b56f8cc@amd.com>

On Fri, Feb 04, 2022 at 10:23:22AM -0600, Limonciello, Mario wrote:
> > > > As there is interest in seeing these capabilities from userspace, it

This needs to be explained in a lot more detail: why, what is going to
use it, how, etc.

We don't do user-visible APIs just because.

> As Tom agreed in previous post, Boris is mistaken here.  I just double
> checked on my side on a workstation that supports SME and comparing
> /proc/cpuinfo before and after SME is enabled via mem_encrypt=on.  I
> confirmed that nothing changed.

Then we should clear that "sme" flag if memory encryption is not
enabled. Like we do for all other flags.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

  reply	other threads:[~2022-02-04 16:28 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 [this message]
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

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