• Ard Biesheuvel's avatar
    arm64: add the initrd region to the linear mapping explicitly · 177e15f0
    Ard Biesheuvel authored
    Instead of going out of our way to relocate the initrd if it turns out
    to occupy memory that is not covered by the linear mapping, just add the
    initrd to the linear mapping. This puts the burden on the bootloader to
    pass initrd= and mem= options that are mutually consistent.
    
    Note that, since the placement of the linear region in the PA space is
    also dependent on the placement of the kernel Image, which may reside
    anywhere in memory, we may still end up with a situation where the initrd
    and the kernel Image are simply too far apart to be covered by the linear
    region.
    
    Since we now leave it up to the bootloader to pass the initrd in memory
    that is guaranteed to be accessible by the kernel, add a mention of this to
    the arm64 boot protocol specification as well.
    Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
    Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
    177e15f0
init.c 13.5 KB