• Andre Przywara's avatar
    arm64: add module support for alternatives fixups · 932ded4b
    Andre Przywara authored
    Currently the kernel patches all necessary instructions once at boot
    time, so modules are not covered by this.
    Change the apply_alternatives() function to take a beginning and an
    end pointer and introduce a new variant (apply_alternatives_all()) to
    cover the existing use case for the static kernel image section.
    Add a module_finalize() function to arm64 to check for an
    alternatives section in a module and patch only the instructions from
    that specific area.
    Since that module code is not touched before the module
    initialization has ended, we don't need to halt the machine before
    doing the patching in the module's code.
    Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
    Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
    932ded4b
alternative.c 2.13 KB