vTPM manager and receiving a request

vTPM manager and receiving a request

[ilish ilish]

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Dear all,
I have a question about the vTPM manager on a Xen system. I want to measure the time when vTPM manager receives a command from the VMs and sends a respond for the command received. I do not know where to place my time function in vTPM manager's source code. Are there any thoughts about my issue?
Thank you very much.
Ilhan 		 	   		  
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Re: vTPM manager and receiving a request

[Jean Guyader]

2010/4/8 ilish ilish <ilishim@hotmail.com>:
> Dear all,
> I have a question about the vTPM manager on a Xen system. I want to measure
> the time when vTPM manager receives a command from the VMs and sends a
> respond for the command received. I do not know where to place my time
> function in vTPM manager's source code. Are there any thoughts about my
> issue?

IIANM the vTPM code leaves in qemu as a emulated device.

The guest entry point would be tis_mem_read*/tis_mem_write*,
then the code uses TPM_receive and TPM_send to communicate with the real TPM.

Jean