[SeaBIOS] [Qemu-devel] SeaBIOS booting time optimization

Kevin O'Connor kevin at koconnor.net
Wed Nov 28 03:08:07 CET 2018


On Wed, Nov 21, 2018 at 12:43:34AM -0500, Stefan Berger wrote:
> On 11/20/18 11:51 AM, Stefano Garzarella wrote:
> > On Tue, Nov 20, 2018 at 5:13 PM Steve Douthit <stephend at silicom-usa.com> wrote:
> > > On 11/20/18 10:55 AM, Kevin O'Connor wrote:
> > > > FYI, this was raised a few months ago - see:
> > > > 
> > > > https://mail.coreboot.org/pipermail/seabios/2018-March/012186.html
> > > > 
> > > > IIRC, it should be possible to verify the TPM device is present before
> > > > trying to wait for it.
> > > We could skip probing entirely if there's no TCPA or TPM2 ACPI tables.
> > > There'd need to be some option to force probing in the case of
> > > missing/broken ACPI configurations.
> > I've just tried the
> > 0001-tpm-Check-for-TPM-related-ACPI-tables-before-attempt.patch
> > (https://mail.coreboot.org/pipermail/seabios/2018-March/012188.html)
> > and it solves my issue with the TPM.
> 
> I have tried it with the attached patch of that mail. We have to apply it,
> also for QEMU. It is this patch here:

Okay, thanks.  I applied Steve's patch.

-Kevin



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