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+
+some TPM related files are missing in sysfs when enable passthrough TPM
+Description of problem:
+When enable passthrough TPM, there are some files in sysfs are missing, like description, uid file.
+under the host linux, we have those file in it:
+root@intel-x86-64:/sys/class/tpm/tpm0/device/firmware_node# cat description 
+TPM 2.0 Device
+root@intel-x86-64:/sys/class/tpm/tpm0/device/firmware_node# cat uid 
+1
+Steps to reproduce:
+after boot into system, check sysfs, there is no description and uid file in /sys/class/tpm/tpm0/device/firmware_node