[SeaBIOS] [PATCH V5 0/9] Add TPM support to SeaBIOS

Kevin O'Connor kevin at koconnor.net
Thu Jul 7 14:43:19 CEST 2011


On Thu, Jul 07, 2011 at 07:48:29AM -0400, Stefan Berger wrote:
> On 07/06/2011 06:58 PM, Kevin O'Connor wrote:
> >BTW, I don't think patch 7 or 9 really make sense to integrate in the
> >official version of SeaBIOS.  Also, in patch 8, I'd prefer to see all
> >new fw_cfg entries use the "romfile" mechanism.
> Patch 7 is the menu. This patch is needed in 'some form' since in
> some cases, like after giving up ownership of the TPM, the TPM
> becomes disabled and deactivated and one has to interact with the
> BIOS to activate and enable it again. Other scenarios include
> someone who has forgotten the owner password for the TPM and now has
> to go through the BIOS to give up ownership of it -- that's the only
> way one can do this then.

Hrmm.  I don't recall seeing this menu on the factory BIOS of real
machines.  How do normal users interact with it?

Can the info be passed in from QEmu?

> I'll have a look at the 'romfile' mechanism for patch 8.
> 
> I only post patch 9 for someone who is interested to be able to run
> the tests. Since the 128kb are slowly filling up, it's not going to
> be compilable with it for much longer and I don't expect it to go
> into the repo.

There is no limit at 128K - if it's exceeded the build will start
using a 256K rom.

More important than the total size is the "fixed" size reported at the
end of the build - that's how much space is used under 1 Meg after the
"post" phase completes.  Ideally it would stay under 64K though that's
not a hard limit either.

-Kevin



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