> On Sep 19, 2023, at 10:31 PM, Song Liu <song@xxxxxxxxxx> wrote: > > As BPF trampoline of different archs moves from bpf_jit_[alloc|free]_exec() > to bpf_prog_pack_[alloc|free](), we need to use different _alloc, _free for > different archs during the transition. Add the following helpers for this > transition: > > void *arch_alloc_bpf_trampoline(int size); > void arch_free_bpf_trampoline(void *image, int size); > void arch_protect_bpf_trampoline(void *image, int size); > void arch_unprotect_bpf_trampoline(void *image, int size); > > The fallback version of these helpers require size <= PAGE_SIZE, but they > are only called with size == PAGE_SIZE. They will be called with size < > PAGE_SIZE when arch_bpf_trampoline_size() helper is introduced later. > > Signed-off-by: Song Liu <song@xxxxxxxxxx> > --- > include/linux/bpf.h | 5 +++++ > kernel/bpf/bpf_struct_ops.c | 12 +++++----- I just found that we need similar changes in net/bpf/bpf_dummy_struct_ops.c. Added it to the next version. Song
