[SeaBIOS] SeaBIOS Digest, Vol 72, Issue 33

[Kevin O'Connor]

On Mon, Dec 21, 2015 at 11:50:07AM -0500, Stefan Berger wrote:
> "Kevin O'Connor" <kevin at koconnor.net> wrote on 12/17/2015 05:22:56 PM:
> 
> > 
> > On Mon, Nov 30, 2015 at 11:32:05AM +0000, Wim Vervoorn wrote:
> > > Hello,
> > > 
> > > I noticed that a lot of work is going on for the TPM support in 
> SeaBIOS.
> > > 
> > > All of this work is TPM 1.2 based. I was wondering if there are any
> > > plans to support TPM 2.0 in the future.
> > 
> > I'm not aware of any plans.
> 
> We're working on it...
> 
> 
> So maybe you have some comments to the following:
> 
> There will be a patch for probing the TPM TIS hardware interface for 
> whether there's a TPM 1.2 or a TPM 2.
> We then have a patch for prefixing all TPM 1.2 functions with tpm12_ and 
> then introduce functions like these ones here:
> 
> static ... tpm12_foo() { ... }
> static ... tpm2_foo() { ... }
> 
> tpm_foo()
> {
>     [...]
> 
>     switch (tpmversion) {
>     case TPM_VERSION_1_2:
>         tpm12_foo()
>         break;
>     case TPM_VERSION_2:
>         tpm2_foo();
>         break;
>     }
> 
>     [...]
> }

Is the difference between 1.2 and 2.0 so large that the above is
needed?

-Kevin