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| -rw-r--r-- | docs/man/xen-vtpmmgr.7.pod | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/docs/man/xen-vtpmmgr.7.pod b/docs/man/xen-vtpmmgr.7.pod index af825a7ffe..875dcce508 100644 --- a/docs/man/xen-vtpmmgr.7.pod +++ b/docs/man/xen-vtpmmgr.7.pod @@ -222,6 +222,17 @@ XSM label, not the kernel. =head1 Appendix B: vtpmmgr on TPM 2.0 +=head2 WARNING: Incomplete - cannot persist data + +TPM 2.0 support for vTPM manager is incomplete. There is no support for +persisting an encryption key, so vTPM manager regenerates primary and secondary +key handles each boot. + +Also, the vTPM manger group command implementation hardcodes TPM 1.2 commands. +This means running manage-vtpmmgr.pl fails when the TPM 2.0 hardware rejects +the TPM 1.2 commands. vTPM manager with TPM 2.0 cannot create groups and +therefore cannot persist vTPM contents. + =head2 Manager disk image setup: The vTPM Manager requires a disk image to store its encrypted data. The image |