• Chris Metcalf's avatar
    tile: provide traceability for hypervisor calls · 9ae09838
    Chris Metcalf authored
    This change adds infrastructure (CONFIG_TILE_HVGLUE_TRACE) that
    provides C code wrappers for the calls the kernel makes to the Tilera
    hypervisor.  This allows standard kernel infrastructure like FTRACE to
    be able to instrument hypervisor calls.
    
    To allow direct calls to the true API, we export their names with a
    leading underscore as well.  This is important for the few contexts
    where we need to make hypervisor calls without touching the stack.
    
    As part of this change, we also switch from creating the symbols
    with linker magic to creating them with assembler magic.  This lets
    us provide a symbol type and generally make them appear more as symbols
    and less as just random values in the Elf namespace.
    Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
    9ae09838
migrate_32.S 4 KB