On Fri, Jul 05, 2019 at 01:58:59PM +0100, Dimitri John Ledkov wrote: > On Fri, 5 Jul 2019 at 13:48, David Michael <fedora....@gmail.com> wrote: > > > > The following are two use cases from Rajat Jain <rajatj...@juniper.net>: > > > > 1) We have a board that boots Linux and this board itself can be > > plugged into one of different chassis types. We need to pass > > different parameters to the kernel based on the "CHASSIS_TYPE" > > information that is passed by the bios in the DMI / SMBIOS > > tables. > > > > 2) We may have a USB stick that can go into multiple boards, and > > the exact kernel to be loaded depends on the machine > > information (PRODUCT_NAME etc) passed via the DMI. > > > > Signed-off-by: David Michael <fedora....@gmail.com> > > Another use case is aarch64 laptops effort. We have the same kernel, > and the same image bootable and usable across 4 different laptop > models, with the only difference between them being the DTB to load. > I was looking at how I can distinguish between the four models and > automatically pick the right dtb. I did see these patches and was very > sad when I found out that they didn't get merged.
I very much don't want us to depend on aarch64-laptops-special-sauce though, so while I want this functionality in GRUB, I do not consider the aarch64-laptops project an argument for that. I am working on extending the standalone DtbLoader driver to do this selection instead, meaning we won't need to roll special installers. https://git.linaro.org/people/leif.lindholm/edk2.git/log/?h=dtbloader / Leif > Thank you for rebasing these on top of v2.04. I will try to cherrypick > them on top of Debian's experimental 2.04 grub and try to build an > installer "that just boots" without requiring users to pick a > particular dtb menuentry by hand. There are only dtbs in these images, > and only one right one for each model. > > (Post install, we have flash-kernel mechanisms to continuously flash > and use the right dtb, this is needed for the installer's grub to be > able to detect models and thus boot the right dtb) > > Whilst these laptops might become dtb-free in the future, I expect new > hardware to come out which would need dtb picker based on SMBIOS info > again. > > -- > Regards, > > Dimitri. > _______________________________________________ > Aarch64-laptops mailing list > aarch64-lapt...@lists.linaro.org > https://lists.linaro.org/mailman/listinfo/aarch64-laptops _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
