For grub-efi we can align the rootfs to start at exactly 16MB from the
beginning of the disk. This can be done by reducing the vfat partition to
be 32 KB smaller than its 16MB size, just like the offset of the vfat
partition.
Signed-off-by: Florian La Roche <Florian.LaRoche@gmail.com>
[Peter: drop redundant offset/size settings, add comment]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Thanks to the introduction of GPT partition table support in genimage,
this commit improves the pc_x86_64_efi_defconfig to remove the use of
the custom script creating the image.
Tested in QEMU, not on a physical device.
So:
- revert commit fee29b05bb7db25e37c8a5175ce00dc712554edf[1]
- add GPT support
- tweak shell script to add the correct UUID in genimage config.
[1]: https://git.buildroot.net/buildroot/commit/?id=fee29b05bb7db25e37c8a5175ce00dc712554edf
[2]: https://git.buildroot.net/buildroot/commit/?id=79b8540d624ac4846ba341b1b9691eccacf0bc05
Signed-off-by: Alexandre PAYEN <alexandre.payen@smile.fr>
Cc: Carlos Santos <casantos@datacom.com.br>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
[Thomas:
- drop commented code in post-build.sh
- take into account comments made by Carlos Santos in
http://patchwork.ozlabs.org/patch/1143502/]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Since all EFI-based systems support GPT, this commit changes
pc_x86_64_efi to use a GPT partition table. It shows an example of how
to craft a disk image with GPT partitioning instead of MBR. This is
achieved by means of a post-image script which uses
mkdosfs+mcopy+sfdisk, since genimage is unable to deal with GPT. Long
term, it would be ideal if genimage had GPT support, but until then,
this script shows how to achieve creating a GPT-based disk image.
The script was kept as simple as possible to make it easy to understand
and adapt for other purposes.
The root filesystem location is passed to the kernel by a partition
UUID, so it is possible to boot on QEMU, directly from the disk image,
or dump the image to a physical device.
Signed-off-by: Carlos Santos <casantos@datacom.com.br>
Acked-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Add two new sample defconfigs oriented towards real PC targets.
It adds two variants for BIOS and EFI boot strategy.
On the build side we enable eudev to autoload relevant kernel
modules/support when necessary.
It adds a bunch of drivers and extra filesystem support which is by no
means extensive/complete, mostly geared towards the hardware i've got at
hand to test with.
This is accomplished by adding on top of the Qemu x86_64 kernel sample
config.
Build connman since by using eudev network interfaces get renamed on
boot thus complicating any form of automatic and friendly bringup.
It also makes Wi-Fi configuration/support easier.
In principle these base defconfigs should work just fine for other
storage media != pendrive like sata or ssd disk, however driver support
isn't there quite yet, and pendrive is mostly supported by usb storage
plus the usual usb host controller drivers.
Tested on old Lenovo laptop (BIOS) and Asus Zenbook (EFI).
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
