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| author | Paolo Bonzini <pbonzini@redhat.com> | 2024-04-04 15:13:15 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-04-11 20:08:22 +0300 |
| commit | ac5c48027bacb1b5525120db6d013373e0520b50 (patch) | |
| tree | da7bb74cd6f47022976387b18bd79f5f42a57d81 /Documentation/virt | |
| parent | 546d714b0880f20572d21ece5b9544c0e37a7a49 (diff) | |
| download | linux-ac5c48027bacb1b5525120db6d013373e0520b50.tar.xz | |
KVM: SEV: publish supported VMSA features
Compute the set of features to be stored in the VMSA when KVM is
initialized; move it from there into kvm_sev_info when SEV is initialized,
and then into the initial VMSA.
The new variable can then be used to return the set of supported features
to userspace, via the KVM_GET_DEVICE_ATTR ioctl.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Isaku Yamahata <isaku.yamahata@intel.com>
Message-ID: <20240404121327.3107131-6-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Documentation/virt')
| -rw-r--r-- | Documentation/virt/kvm/x86/amd-memory-encryption.rst | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/virt/kvm/x86/amd-memory-encryption.rst b/Documentation/virt/kvm/x86/amd-memory-encryption.rst index 84335d119ff1..2ea648e4c97a 100644 --- a/Documentation/virt/kvm/x86/amd-memory-encryption.rst +++ b/Documentation/virt/kvm/x86/amd-memory-encryption.rst @@ -425,6 +425,18 @@ issued by the hypervisor to make the guest ready for execution. Returns: 0 on success, -negative on error +Device attribute API +==================== + +Attributes of the SEV implementation can be retrieved through the +``KVM_HAS_DEVICE_ATTR`` and ``KVM_GET_DEVICE_ATTR`` ioctls on the ``/dev/kvm`` +device node, using group ``KVM_X86_GRP_SEV``. + +Currently only one attribute is implemented: + +* ``KVM_X86_SEV_VMSA_FEATURES``: return the set of all bits that + are accepted in the ``vmsa_features`` of ``KVM_SEV_INIT2``. + Firmware Management =================== |