[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [ vTPM ] ownership disappear
On September 20, 2016 9:14, > Hi everyone, > when I create a vTPM instance and attached to it a VM, I use tpm-tools to > take thw ownership of the vTPM. Then, > if I destroy the vTPM and the VM, my expectation is that when I re-create the > same vTPM attached to the same VM, > the owership is already taken, but this is not the case: if I re-run > tpm_takeownership, the command is successfull. > Why this happens? Ernesto, I think the emulated TPM is always started with 'ST_CLEAR' status.. in vtpm.c: |main() |-main_loop() -- tpm_emulator_init(opt_args.startup ...) in tpm_emulator_init(), the opt_args.startup is with ''ST_CLEAR'' struct Opt_args opt_args = { .startup = ST_CLEAR, ... }; btw, in my experience, when tpm_takeownership is successfull and you re-run it again, it also print out '''success''' cc: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx> Emil Condrea <emilcondrea@xxxxxxxxx> Huawei 2012 lab Quan Xu _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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