Daniel Borkmann <daniel@xxxxxxxxxxxxx> writes: > On 2/24/21 8:54 PM, Luigi Rizzo wrote: >> I prepared a BPF version of kstats[1] >> https://github.com/luigirizzo/lr-cstats >> that uses fentry/fexit hooks to monitor the execution time >> of a kernel function. >> >> I hoped to have it working on ARM64 too, but it looks like >> arch_prepare_bpf_trampoline() only exists for x86. >> >> Is there any outstanding patch for this function on ARM64, >> or any similar function I could look at to implement it myself ? > > Not that I'm currently aware of, arm64 support would definitely be great > to have. From x86 side, the underlying arch dependency was basically on > text_poke_bp() to patch instructions on a live kernel. Haven't checked > recently whether an equivalent exists on arm64 yet, but perhaps Will > might know. Adding Jean-Philippe; I believe he is/was working on this...? -Toke
