x86/virt: Provide "nosnp" boot option for sev kernel command line

Browse source

Provide a "nosnp" kernel command line option to prevent enabling of the RMP
and SEV-SNP features in the host/hypervisor. Not initializing the RMP
removes system overhead associated with RMP checks.

  [ bp: Actually make it a HV-only cmdline option. ]

Co-developed-by: Eric Van Tassell <Eric.VanTassell@amd.com>
Signed-off-by: Eric Van Tassell <Eric.VanTassell@amd.com>
Signed-off-by: Pavan Kumar Paluri <papaluri@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20241014130948.1476946-3-papaluri@amd.com

...

This commit is contained in:

Pavan Kumar Paluri 2024-10-14 08:09:48 -05:00 • committed by Borislav Petkov (AMD)

parent 4ae47fa7e8

commit 2db67aaca5

2 changed files with 17 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

5

Documentation/arch/x86/x86_64/boot-options.rst

View file

12

arch/x86/virt/svm/cmdline.c

View file