sev/i386: add command to encrypt guest memory region
The KVM_SEV_LAUNCH_UPDATE_DATA command is used to encrypt a guest memory region using the VM Encryption Key created using LAUNCH_START. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: NBrijesh Singh <brijesh.singh@amd.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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