Checks if `uefi_splash_image` exists in `dracutsysroot` if not unset
`uefi_splash_image`. Alternate Value parameter expansion adds section-vma
for splash image to EFI stub loader when the path to image is valid and
not an empty file.
I did not test on other distributions, but on Arch Linux the `systemd`
package includes a splash image at the path
`/usr/share/systemd/bootctl/splash-arch.bmp`. Perhaps, if this is a
common practice, a default image could be gathered from that directory.
It is required that the image be in bitmap (`.bmp`) format according to
`splash.c`.
The code for `stub.c` and `splash.c` can be found at:
https://github.com/systemd/systemd/blob/master/src/boot/efi/stub.chttps://github.com/systemd/systemd/blob/master/src/boot/efi/splash.c
We initially enabled it for Haswell TSX bug (mga#16657)
Now there is also Meltdown and Spectre security issues,
and more microcode issues will most likely show up...
So the sane default for 'early_microcode' to have it enabled,
as theese changes must be done early in boot process to take
effect as intended.
Update documentation accordingly.
Reference: https://bugs.mageia.org/show_bug.cgi?id=16657
Signed-off-by: Thomas Backlund <tmb@mageia.org>
Signed-off-by: Neal Gompa <ngompa13@gmail.com>
Some docs claimed that values in certain config files would be
overwritten, when they would actually be overridden.
Override: a file is not modified but its contents are superseded by
something else. (configurations set in
/etc/dracut.conf.d/*.conf override configurations set in
/etc/dracut.conf)
Overwrite: a file is modified or its contents replaced by an action
(use dracut --force to overwrite the existing initramfs)
With an EFI stub, the kernel, the initramfs and a kernel cmdline can be
glued together to a single UEFI executable, which can be booted by a
UEFI BIOS.
loginstall specifies a directory, in which dracut-install records all
files, which were installed from the host system to the initramfs.
Use case is e.g. to create a list of packages to watch for updates, to
maybe trigger a recreation of the initramfs.
Which will not only add listed drivers, but also enforce that they are
tried to be loaded at early boot time.
This is needed if drivers which are not autoloaded (e.g. loop and a lot
others) shall get loaded via initramfs.
With the same source of files, it should be possible to generate the
same image file with every dracut run.
To accomplish this, we modify the timestamps of the files we generate at
runtime, call gzip with "-n" and cpio with "--reproducible".
The cpio --reproducible option is not yet upstream though, so if you
feel like it should be then please nag at the cpio mailing list.
http://lists.gnu.org/archive/html/bug-cpio/2014-08/msg00000.html
--hostonly-cmdline:
Store kernel command line arguments needed in the initramfs
--no-hostonly-cmdline:
Do not store kernel command line arguments needed in the initramfs
if i18n_install_all is set to "yes", then install all keyboard layouts
and fonts regardless of the hostonly setting.
This way, people can switch keyboard layouts, without having to recreate
the initramfs.
This also changes the command line switch to be --add-device and the
config directive is set to add_device. This was chosen as device= in the
config file seems too generic and not quite as consistent with other
directives (i.e. drivers/add_drivers)
The --device command line is still supported but it should be considered
deprecated in favour of --add-device.
Daniel Molkentin