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[Xen-users] dmidecode and IMA Bios Measurements for Guest OS


In the IMA enabled guest OS [1] of my Xen setup, ÂIMA is failing to create bios_measurements file (/sys/kernel/security/tpm0). It has the following data:

[ Â 65.227006] read_log: ERROR - Could not get TCPA table
cat: binary_bios_measurements: Input/output error

Is this because of the virtual bios of Xen? I tried changing the BIOS to rombios or seabios, it resulted in the same output as above. Querying the BIOS using dmidecode Âalso fails with the following error.

# dmidecode 2.9
# No SMBIOS nor DMI entry point found, sorry.

Is this the expected behaviour of guest os within Xen? Any help will be greatly appreciated.

[1] I have custom a compiled Âthe linux-konrad-xen (3.10.0+) with VTPM patch from (Âhttps://lkml.org/lkml/2013/7/1/540) as DomU kernel. It is installed over Ubuntu Quantal. Dom0 runs Debian Wheezy.


Karthick Ramachandran
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