[coreboot] RFC GSOC project idea ACPI 4.0/5.0 APIE and ERST for kernel pstore support

[QingPei Wang]

​for GSOC students, i think this ideas would be enough for new guys. we can
not assume the potential guy is much familiar with coreboot. ​



Best wishes
QingPei Wang
Phone: 86+18930528086


On Thu, Mar 21, 2013 at 4:53 AM, Marc Jones <marcj303 at gmail.com> wrote:

> On Wed, Mar 20, 2013 at 2:26 PM, Patrick Georgi <patrick at georgi-clan.de>
> wrote:
> > Am 20.03.2013 21:09, schrieb Marc Jones:
> >> The ACPI APIE and ERST methods allow the kernel to mount pstore to
> >> store information in NVRAM (coreboot cbfs). This could be used to
> >> store errors that are otherwise difficult to track, like suspend and
> >> resume issues. The implementation would need to be able to find an
> >> area free in cbfs for storing the data.
> > Reserve it beforehand? That's what I intend to do for Tiano variables
>
> Yes, I think we would need a cbfs file for allocating the region
> before hand and then that would be used by ERST and pstore. I don' t
> know how the region internals work. Also, there are problaly some
> pstore limitation and knowing the flash device before hand to set
> alignment (erase blocks) etc.
>
> Marc
>
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