• Dave Martin's avatar
    arm64/sve: Thin out initialisation sanity-checks for sve_max_vl · 87c021a8
    Dave Martin authored
    Now that the kernel SVE support is reasonably mature, it is
    excessive to default sve_max_vl to the invalid value -1 and then
    sprinkle WARN_ON()s around the place to make sure it has been
    initialised before use.  The cpufeatures code already runs pretty
    early, and will ensure sve_max_vl gets initialised.
    
    This patch initialises sve_max_vl to something sane that will be
    supported by every SVE implementation, and removes most of the
    sanity checks.
    
    The checks in find_supported_vector_length() are retained for now.
    If anything goes horribly wrong, we are likely to trip a check here
    sooner or later.
    Signed-off-by: default avatarDave Martin <Dave.Martin@arm.com>
    Acked-by: default avatarWill Deacon <will.deacon@arm.com>
    Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
    87c021a8
ptrace.c 41 KB