firmware error 0x16

[aep]

using host and guest kernel from https://github.com/AMDESE/linux-svsm

./sev-guest-get-report /tmp/something
Generating report using the following hash: 
    0000000000000000000000000000000000000000000000000000000000000000
    0000000000000000000000000000000000000000000000000000000000000000

firmware error 0x16
get_report: Invalid argument

[dubek]

Note that sev-guest uses VMPL0 when it requests the attestation report. That won't work with SVSM in which Linux is running in VMPL1.

I submitted #27 to allow setting VMPL from sev-guest-get-report command line using -v 1. Maybe that will help.