On Thu, Apr 3, 2025 at 8:30 AM Naveen N Rao <nav...@kernel.org> wrote: [...] > > We haven't addressed this particular interaction in the powerpc support > for ftrace direct and BPF trampolines. Right now, live patching takes > priority so we call the livepatch'ed function and skip further ftrace > direct calls. > > I'm curious if this works on arm64 with which we share support for > DYNAMIC_FTRACE_WITH_CALL_OPS.
We still need to land [1] for arm64 to support livepatch. In a quick test with [1], livepatch and bpf trampoline works together. I haven't looked into the arm64 JIT code, so I am not sure whether all the corner cases are properly handled. [1] https://lore.kernel.org/live-patching/20250320171559.3423224-1-s...@kernel.org/ Thanks, Song > > > > > > Hmm, I'm not sure how well BPF function attachment and live patching > > > interact. Can you see if on x86 the live patch is actually updated when a > > > BPF program is attached?
