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| author | Michael Roth <michael.roth@amd.com> | 2022-03-07 22:33:50 +0100 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-04-07 16:47:12 +0200 |
| commit | ba37a1438aeb540cc48722d629f4b2e7e4398466 (patch) | |
| tree | cc68657e561f2ea7dba2551540ddcb1d5f781016 /Documentation/x86 | |
| parent | x86/sev: Use firmware-validated CPUID for SEV-SNP guests (diff) | |
| download | linux-ba37a1438aeb540cc48722d629f4b2e7e4398466.tar.xz linux-ba37a1438aeb540cc48722d629f4b2e7e4398466.zip | |
x86/sev: Add a sev= cmdline option
For debugging purposes it is very useful to have a way to see the full
contents of the SNP CPUID table provided to a guest. Add an sev=debug
kernel command-line option to do so.
Also introduce some infrastructure so that additional options can be
specified via sev=option1[,option2] over time in a consistent manner.
[ bp: Massage, simplify string parsing. ]
Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220307213356.2797205-41-brijesh.singh@amd.com
Diffstat (limited to 'Documentation/x86')
| -rw-r--r-- | Documentation/x86/x86_64/boot-options.rst | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/x86/x86_64/boot-options.rst b/Documentation/x86/x86_64/boot-options.rst index 07aa0007f346..4efb1fa039ef 100644 --- a/Documentation/x86/x86_64/boot-options.rst +++ b/Documentation/x86/x86_64/boot-options.rst @@ -310,3 +310,17 @@ Miscellaneous Do not use GB pages for kernel direct mappings. gbpages Use GB pages for kernel direct mappings. + + +AMD SEV (Secure Encrypted Virtualization) +========================================= +Options relating to AMD SEV, specified via the following format: + +:: + + sev=option1[,option2] + +The available options are: + + debug + Enable debug messages. |