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

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Message-ID: <20240801205638.6603-1-papaluri@amd.com>
Date: Thu, 1 Aug 2024 15:56:36 -0500
From: Pavan Kumar Paluri <papaluri@....com>
To: <linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>
CC: 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>, Brijesh Singh <brijesh.singh@....com>, "H . Peter
 Anvin" <hpa@...or.com>, Peter Zijlstra <peterz@...radead.org>, "Pavan Kumar
 Paluri" <papaluri@....com>
Subject: [PATCH 0/2] "nosnp" sev command line support

Provide "nosnp" boot option via "sev=nosnp" kernel command line to
prevent SNP-capable host kernel from enabling SEV-SNP and initializing
RMP table.

On providing sev=nosnp via kernel command line:
cat /sys/module/kvm_amd/parameters/sev_snp should be "N".

This patchset is based on tip/master.

Any feedback is much appreciated.

	Pavan
---
Pavan Kumar Paluri (2):
  x86, KVM:SVM: Move sev specific parsing into arch/x86/virt/svm
  x86 KVM:SVM: Provide "nosnp" boot option for sev kernel command line

 .../arch/x86/x86_64/boot-options.rst          |  3 ++
 arch/x86/coco/sev/core.c                      | 44 -------------------
 arch/x86/include/asm/sev-common.h             | 27 ++++++++++++
 arch/x86/virt/svm/Makefile                    |  1 +
 arch/x86/virt/svm/cmdline.c                   | 38 ++++++++++++++++
 5 files changed, 69 insertions(+), 44 deletions(-)
 create mode 100644 arch/x86/virt/svm/cmdline.c


base-commit: 6d9b02543ea85fcef2595e0a7a63a336ea2ac5e1
-- 
2.34.1