[Xen-devel] regarding vtpm setup

[Aastha Mehta <aasthakm@xxxxxxxxx>]

Hello,

I am trying to setup vtpmmgr and vtpm on the latest custom built
xen-4.4 and I am following the steps provided at this link -
http://xenbits.xen.org/docs/unstable/misc/vtpm.txt

When I create the vtpmmgr domain, following is a snippet of the output
that I see:

******************* BLKFRONT for device/vbd/768 **********
backend at /local/domain/0/backend/qdisk/2/768
Failed to read /local/domain/0/backend/qdisk/2/768/feature-barrier.
32768 sectors of 512 bytes
**************************

and xl dmesg shows the following:
(XEN) event_channel.c:271:d0 EVTCHNOP failure: domain 2, error -22
(XEN) event_channel.c:271:d0 EVTCHNOP failure: domain 2, error -22

Next, when I create vtpm domain, following is the snippet of the
output on the vtpm console:

******************* BLKFRONT for device/vbd/768 **********
backend at /local/domain/0/backend/qdisk/3/768
Failed to read /local/domain/0/backend/qdisk/3/768/feature-barrier.
16384 sectors of 512 bytes
**************************
vtpm_cmd.c:155: Info: Requesting Encryption key from backend
vtpm_cmd.c:164: Error: VTPM_LoadHashKey() failed with error code (3)
vtpm_cmd.c:175: Error: VTPM_LoadHashKey failed
tpm_data.c:120: Info: initializing TPM data to default values

This is the vtpmmgr output:

Tpmback:Info Frontend 3/0 connected
INFO[VTPM]: Passthrough: TPM_GetRandom
INFO[VTPM]: Waiting for commands from vTPM's:
INFO[VTPM]: Passthrough: TPM_GetRandom
INFO[VTPM]: Waiting for commands from vTPM's:
ERROR[VTPM]: LoadKey failure: Unrecognized uuid!
c606b894-14e7-44db-bdcc-4ae05d686784
ERROR[VTPM]: Failed to load key
ERROR in vtpmmgr_LoadHashKey at vtpm_cmd_handler.c:78 code: TPM_BAD_PARAMETER.
INFO[VTPM]: Waiting for commands from vTPM's:
INFO[VTPM]: Registered vtpm c606b894-14e7-44db-bdcc-4ae05d686784
INFO[VTPM]: Generating a new symmetric key
INFO[VTPM]: Binding encrypted key
INFO[TPM]: TPM_Bind
INFO[VTPM]: Encrypting the uuid table
INFO[TPM]: TPM_Bind
INFO[VTPM]: Saved hash and key for vtpm c606b894-14e7-44db-bdcc-4ae05d686784
INFO[VTPM]: Waiting for commands from vTPM's:
INFO[TPM]: TPM_Bind
INFO[VTPM]: Saved hash and key for vtpm c606b894-14e7-44db-bdcc-4ae05d686784
INFO[VTPM]: Waiting for commands from vTPM's:


This is the xl dmesg output:
(d3) ============= Init TPM BACK ================
(d3) Thread "tpmback-listener": pointer: 0x2000802fb0, stack: 0x130000
(d3) ============= Init TPM Front ================
(d3) Tpmfront:Info Waiting for backend connection..
(d2) Tpmback:Info Frontend 3/0 connected
(d3) Tpmfront:Info Backend Connected
(d3) Tpmfront:Info Initialization Completed successfully
(d3) ******************* BLKFRONT for device/vbd/768 **********
(d3) backend at /local/domain/0/backend/qdisk/3/768
(d3) Failed to read /local/domain/0/backend/qdisk/3/768/feature-barrier.
(d3) 16384 sectors of 512 bytes
(d3) **************************
(d3) blk_open(device/vbd/768) -> 3


Finally, when I try to create the guest domain, I again see the
following error in xl dmesg:

(XEN) event_channel.c:271:d0 EVTCHNOP failure: domain 4, error -22
(XEN) event_channel.c:271:d0 EVTCHNOP failure: domain 4, error -22
(XEN) event_channel.c:271:d0 EVTCHNOP failure: domain 4, error -22
(d4) mapping kernel into physical memory
(d4) about to get started...
(d3) Tpmback:Info Frontend 4/0 connected

I have the following config parameters in the dom0 and domU kernels
(ubuntu 12.04):

dom0 (kernel 3.13.2):
CONFIG_TCG_TPM=y
CONFIG_TCG_XEN=m

domU (kernel 3.13.5):
CONFIG_TCG_TPM=y
CONFIG_TCG_XEN=y

I believe the setup is not working correctly. Could someone let me
know what is wrong? Please let me know if I must provide any further
details.

Thanks in advance.

Regards,
Aastha Mehta.

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