Re: TCG2 Physical Presence Support in OVMF

["Yao, Jiewen" <jiewen.yao@intel.com>]

HI Jason
TCG2 PP support requires the presence of TPM2 hardware.
Does OVMF support TPM2 hardware?


If it supports, you can add code in BDS.
You may refer to edk2\Vlv2TbltDevicePkg\Library\PlatformBdsLib\BdsPlatform.c.


Thank you
Yao Jiewen

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Jason
> Dickens
> Sent: Friday, June 30, 2017 12:13 AM
> To: edk2-devel@lists.01.org
> Subject: [edk2] TCG2 Physical Presence Support in OVMF
> 
> All,
> I'm working with a secure boot enabled OVMF build of EDK II and Xen and
> have questions about TCG2 support, both status in general and specific
> questions below.
> 
> I'm trying to get the TCG Physical Presence protocol to work or at least
> understand more about why it can't in my case.
> 
> Specifically, I have found a key function in
> DxeTcg2PhysicalPresenceLib.c called
> Tcg2PhysicalPresenceLibProcessRequest. This appears to be the method
> that gets user confirmation and then performs the requested operations
> after a reboot? However, I cannot determine where this function is
> called? If it is currently dead code then I would like to know where it
> should be called and why its not connected in?
> 
> BTW: I understand that on Xen i'm also going to have issues with the SMM
> piece due to q35 and SMRAM problems, but independent of the Xen issues,
> I would like a clear picture of the current limitations in OVMF
> regarding TPM 2.0 operation? Are there functions needing implementation,
> that I could also contribute to?
> 
> Any help would be appreciated.
> 
> Thanks,
> Jason
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