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Re-add xHCI only on haswell and broadwell machines, where
they are needed. Otherwise, keep the same GRUB code.
The xHCI patches were removed because they caused issues
on Sandybridge-based Dell Latitude laptops. See:
https://codeberg.org/libreboot/lbmk/issues/216
The issue was not reported elsewhere, including on the
Haswell/Broadwell hardware where they are needed, but the
build system could only build one version of GRUB.
The older machines do not need xHCI patches, because they
either do not have xHCI patches, or work (in GRUB) because
they're in EHCI mode when running the payload.
So, the problem is that we need the xHCI patches for GRUB
on Haswell/Broadwell hardware, but the patches break
Sandybridge hardware, and we only had the one build of GRUB.
To mitigate this problem, the build system now supports
building multiple revisions of GRUB, with different patches,
and each given coreboot target can say which GRUB tree to use
by setting this in target.cfg:
grubtree="xhci"
In the above example, the "xhci" tree would be used. Some
generic GRUB config has been moved to config/data/grub/
and config/grub/ now looks like config/coreboot/ - also,
the grub.cfg file (named "payload" in each tree) is copied
to the GRUB source tree as ".config", then added to GRUB's
memdisk in the same way, as grub.cfg.
Several other design changes had to be made because of this:
* grub.cfg in memdisk no longer automatically jumps to one
in CBFS, but now shows a menuentry for it if available
* Certain commands in script/trees are disabled for GRUB,
such as *config make commands.
* gnulib is now defined in config/submodule/grub/, instead
of config/git/grub - and this mitigates an existing bug
where downloading gnulib first would make grub no longer
possible to download in lbmk.
The coreboot option CONFIG_FINALIZE_USB_ROUTE_XHCI has been
re-enabled on: Dell OptiPlex 9020 MT, Dell OptiPlex 9020 SFF,
Lenovo ThinkPad T440p and Lenovo ThinkPad W541 - now USB should
work again in GRUB.
The GRUB payload has been re-enabled on HP EliteBook 820 G2.
This change will enable per-board GRUB optimisation in the
future. For example, we hardcode what partitions and LVMs
GRUB scans because * is slow on ICH7-based machines, due
to GRUB's design. On other machines, * is reasonably fast,
for automatically enumerating the list of devices for boot.
Use of * (and other wildcards) could enable our GRUB payload
to automatically boot more distros, with minimal fuss. This
can be done at a later date, in subsequent revisions.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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also, enable seabios_withgrub on e6400, but not grubfirst;
right now, we also support dgpu which would brick on
grubfirst. on my tested nvidia model, loading grub from
seabios worked, so i'm going to re-add seabios_grubfirst
functionality like in older libreboot revisions, enabled
selectively on a given target.
e6430 currently only has igpu support anyway, but i've done
the same thing there, in anticipation of future dgpu support.
e6400 and e6430 ec report scancode set 2 with translation
by default, but only actually output scancode set 1
grub is trying to use scancode set 2 without scancode
translation, so the key inputs get messed up
fix it by forcing scancode set 2 with translation, but
only on coreboot; other build targets on GRUB will
retain the same behaviour as before
courtesy goes to Nicholas Chin who inspired me, and
helped me to fix this. tested on Nicholas's E6400
and E6430, and my E6400; Riku also tested it on
non-Dell, as did I (some thinkpads), and all seems OK.
The new behaviour in coreboot GRUB is essentially no
different to that of SeaBIOS, which does the same.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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