• Catalin Marinas's avatar
    arm64: Remove I-cache invalidation from flush_cache_range() · ee6a7fce
    Catalin Marinas authored
    The flush_cache_range() function (similarly for flush_cache_page()) is
    called when the kernel is changing an existing VA->PA mapping range to
    either a new PA or to different attributes. Since ARMv8 has PIPT-like
    D-caches, this function does not need to perform any D-cache
    maintenance. The I-cache maintenance is already handled via set_pte_at()
    and flush_cache_range() cannot anyway guarantee that there are no cache
    lines left after invalidation due to the speculative loads.
    
    This patch makes flush_cache_range() a no-op.
    Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
    ee6a7fce
flush.c 2.41 KB