Re: [PATCH] grub-mkconfig/20_linux_xen: Support multiple early initrd images

[Daniel Kiper]

On Sat, Dec 08, 2018 at 02:35:03PM +0100, Peter Große wrote:
> Add support for multiple, shared, early initrd images. These early
> images will be loaded in the order declared, and all will be loaded
> before the initrd image.
>
> While many classes of data can be provided by early images, the
> immediate use case would be for distributions to provide CPU
> microcode to mitigate the Meltdown and Spectre vulnerabilities.
>
> Xen has also support to load microcode updates provided as additional
> modules by the bootloader.
>
> There are two environment variables provided for declaring the early
> images.
>
> * GRUB_EARLY_INITRD_LINUX_STOCK is for the distribution declare
>   images that are provided by the distribution or installed packages.
>   If undeclared, this will default to a set of common microcode image
>   names.
>
> * GRUB_EARLY_INITRD_LINUX_CUSTOM is for user created images. User
>   images will be loaded after the stock images.
>
> These separate configurations allow the distribution and user to
> declare different image sets without clobbering each other.
>
> This also makes a minor update to ensure that UUID partition labels
> stay disabled when no initrd image is found, even if early images are
> present.
>
> This is basically a copy of a698240d "grub-mkconfig/10_linux: Support
> multiple early initrd images" by Matthew S. Turnbull.
>
> Signed-off-by: Peter Große <address@hidden>

Reviewed-by: Daniel Kiper <address@hidden>

Daniel