KVM: SVM: Define sev_features and VMPL field in the VMSA

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The hypervisor uses the sev_features field (offset 3B0h) in the Save State
Area to control the SEV-SNP guest features such as SNPActive, vTOM,
ReflectVC etc. An SEV-SNP guest can read the sev_features field through
the SEV_STATUS MSR.

While at it, update dump_vmcb() to log the VMPL level.

See APM2 Table 15-34 and B-4 for more details.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Venu Busireddy <venu.busireddy@oracle.com>
Link: https://lore.kernel.org/r/20220307213356.2797205-2-brijesh.singh@amd.com

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Brijesh Singh 2022-03-07 15:33:11 -06:00 • committed by Borislav Petkov

parent 3123109284

commit 046f773be1

2 changed files with 6 additions and 4 deletions

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6

arch/x86/include/asm/svm.h

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arch/x86/kvm/svm/svm.c

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