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

From: Pavan Kumar Paluri
Date: Thu Aug 01 2024 - 16:57:00 EST


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