Re: [Xen-devel] [PATCH] [Firmware] TCG BIOS extensions for the Bochs BIOS

[Stefan Berger <stefanb@xxxxxxxxxx>]

xen-devel-bounces@xxxxxxxxxxxxxxxxxxx wrote on 12/08/2006
04:24:31 AM:

> On 7/12/06 22:04, "Stefan Berger" <stefanb@xxxxxxxxxx>
wrote:
> 
> > Bochs BIOS and enables logging of boot measurements using the
previously
> > implemented support for TCPA ACPI tables. A low-level driver
for a TPM
> > TIS device and an Atmel device is provided.
> > 
> > The implemented specification is described here:
> > 
> > https://www.trustedcomputinggroup.
> org/specs/PCClient/TCG_PCClientImplementatio
> > nforBIOS_1-20_1-00.pdf
> > 
> > I added a #define 'BX_TCGBIOS' to rombios.c that enables or disables
> > these extensions. It's currently disabled so none of the code
is
> > compiled into the BIOS.
> 
> Is there a good reason for it being implemented almost entirely in
assembly
> language?

The compiled TCG extension code adds approximately
0x2500 bytes to the BIOS and would add more to it if it was written in
'C'.

   Stefan


> 
>  -- Keir
> 
> 
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