linux-kernel - Re: [PATCH 0/2] "nosnp" sev command line support

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Message-ID: <ZqwOjxRAfhjNw5Vs@casper.infradead.org>
Date: Thu, 1 Aug 2024 23:39:11 +0100
From: Matthew Wilcox <willy@...radead.org>
To: "Paluri, PavanKumar" <papaluri@....com>
Cc: linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	Borislav Petkov <bp@...en8.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Eric Van Tassell <Eric.VanTassell@....com>,
	Tom Lendacky <thomas.lendacky@....com>,
	Ashish Kalra <ashish.kalra@....com>,
	Michael Roth <michael.roth@....com>,
	"H . Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"Giani, Dhaval" <Dhaval.Giani@....com>
Subject: Re: [PATCH 0/2] "nosnp" sev command line support

On Thu, Aug 01, 2024 at 05:23:29PM -0500, Paluri, PavanKumar wrote:
> Hi Matthew,
> 
> On 8/1/2024 3:58 PM, Matthew Wilcox wrote:
> > On Thu, Aug 01, 2024 at 03:56:36PM -0500, Pavan Kumar Paluri wrote:
> >> Provide "nosnp" boot option via "sev=nosnp" kernel command line to
> >> prevent SNP-capable host kernel from enabling SEV-SNP and initializing
> >> RMP table.
> > 
> > Congratulations on using three acronyms multiple times and defining none
> > of them.
> 
> I apologize for not defining the acronyms, I had wrongly assumed they
> were well understood by the reviewers/maintainers. I can fix that up
> going forward. In the meantime:

You cc'd linux-doc.  That's going to people who have no idea what
specialist part of the kernel you're working on.

> RMP: Reverse Map Table
> SEV: Secure Encrypted Virtualization
> SNP: Secure Nested Paging
> 
> These definitions are also available in AMD-APM vol 2: Chapter 15 [1]
> 
> [1]:
> https://www.amd.com/content/dam/amd/en/documents/processor-tech-docs/programmer-references/24593.pdf
> 
> Thanks,
> Pavan