From: Joerg Roedel <jroedel@suse.de>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>,
x86@kernel.org, hpa@zytor.com,
Tom Lendacky <thomas.lendacky@amd.com>,
Nikunj A Dadhania <nikunj@amd.com>,
Larry.Dewey@amd.com, linux-kernel@vger.kernel.org,
linux-coco@lists.linux.dev, Juergen Gross <jgross@suse.com>,
kirill.shutemov@linux.intel.com, alexey.gladkov@intel.com
Subject: Re: [PATCH 2/2] x86/sev: Make SEV_STATUS available via SYSFS
Date: Wed, 12 Mar 2025 16:07:56 +0100 [thread overview]
Message-ID: <Z9GjTBHBqXenCWYx@suse.de> (raw)
In-Reply-To: <ef3f3117-6cd5-4b94-8ddb-e6d224efac60@intel.com>
Hi Dave,
On Wed, Mar 12, 2025 at 07:57:31AM -0700, Dave Hansen wrote:
> Do we really want to just plumb the raw MSR out to userspace? Users
> would still need to parse the thing, so it's not _really_ human readable.
I agree that this is not really human readable. On the other side SYSFS
is more an interface targeted for tools than optimized for human
readability (see the one-datum-per-file rule).
The actual use-case (and the reason for these patches) of the sev_status
file is to provide a better and more secure interface than /dev/msr to a
tool named snpguest.
A human readable form of this can be added as well, if needed. There is
already a line in dmesg with the decoded features.
Regards,
--
Jörg Rödel
jroedel@suse.de
SUSE Software Solutions Germany GmbH
Frankenstraße 146
90461 Nürnberg
Germany
https://www.suse.com/
Geschäftsführer: Ivo Totev, Andrew McDonald, Werner Knoblich
(HRB 36809, AG Nürnberg)
next prev parent reply other threads:[~2025-03-12 15:08 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-12 14:41 [PATCH 0/2 v2] Move SEV sysfs information and expose MSR_SEV_STATUS Joerg Roedel
2025-03-12 14:41 ` [PATCH 1/2] x86/coco/sev: Move SEV SYSFS group to /sys/hypervisor/ Joerg Roedel
2025-03-12 15:11 ` Tom Lendacky
2025-03-12 15:13 ` Joerg Roedel
2025-03-12 15:32 ` Liam Merwick
2025-03-12 15:43 ` Joerg Roedel
2025-03-12 14:41 ` [PATCH 2/2] x86/sev: Make SEV_STATUS available via SYSFS Joerg Roedel
2025-03-12 14:46 ` Tom Lendacky
2025-03-12 14:56 ` Joerg Roedel
2025-03-12 14:57 ` Dave Hansen
2025-03-12 15:07 ` Joerg Roedel [this message]
2025-03-12 16:04 ` Dave Hansen
2025-03-12 16:19 ` Joerg Roedel
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