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Date: Thu, 30 May 2024 19:06:12 +0200
From: Borislav Petkov <bp@alien8.de>
To: Tom Lendacky <thomas.lendacky@amd.com>
CC: linux-kernel@vger.kernel.org, x86@kernel.org, linux-coco@lists.linux.dev,
 svsm-devel@coconut-svsm.dev, Thomas Gleixner <tglx@linutronix.de>,
 Ingo Molnar <mingo@redhat.com>, Dave Hansen <dave.hansen@linux.intel.com>,
 "H. Peter Anvin" <hpa@zytor.com>, Andy Lutomirski <luto@kernel.org>,
 Peter Zijlstra <peterz@infradead.org>,
 Dan Williams <dan.j.williams@intel.com>, Michael Roth <michael.roth@amd.com>,
 Ashish Kalra <ashish.kalra@amd.com>
Subject: Re: [PATCH v4 09/15] x86/sev: Provide guest VMPL level to userspace
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On May 28, 2024 11:08:35 PM GMT+02:00, Tom Lendacky <thomas=2Elendacky@amd=
=2Ecom> wrote:
>I can move it there=2E Or what about creating a coco folder under /sys/ke=
rnel/? This would then create /sys/kernel/coco/sev/?
>

Sysfs hierarchy is special - can't just add stuff willy nilly=2E This doc =
hints at that:

https://git=2Ekernel=2Eorg/pub/scm/linux/kernel/git/torvalds/linux=2Egit/t=
ree/Documentation/filesystems/sysfs=2Erst

And then those things get documented here:

https://git=2Ekernel=2Eorg/pub/scm/linux/kernel/git/torvalds/linux=2Egit/t=
ree/Documentation/ABI

and supported forever and ever until the end of time=2E

So the usage needs to be precisely documented and weighed whether we reall=
y need it=2E=2E=2E

Thx=2E

--=20
Sent from a small device: formatting sucks and brevity is inevitable=2E