| Message ID | cover.1644216043.git.naveen.n.rao@linux.vnet.ibm.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | powerpc64/bpf: Add support for BPF Trampolines | expand |
Le 07/02/2022 à 08:07, Naveen N. Rao a écrit : > This is an early RFC series that adds support for BPF Trampolines on > powerpc64. Some of the selftests are passing for me, but this needs more > testing and I've likely missed a few things as well. A review of the > patches and feedback about the overall approach will be great. > > This series depends on some of the other BPF JIT fixes and enhancements > posted previously, as well as on ftrace direct enablement on powerpc > which has also been posted in the past. Is there any reason to limit this to powerpc64 ? Christophe
Christophe Leroy wrote: > > > Le 07/02/2022 à 08:07, Naveen N. Rao a écrit : >> This is an early RFC series that adds support for BPF Trampolines on >> powerpc64. Some of the selftests are passing for me, but this needs more >> testing and I've likely missed a few things as well. A review of the >> patches and feedback about the overall approach will be great. >> >> This series depends on some of the other BPF JIT fixes and enhancements >> posted previously, as well as on ftrace direct enablement on powerpc >> which has also been posted in the past. > > Is there any reason to limit this to powerpc64 ? I have limited this to elf v2, and we won't be able to get this working on elf v1, since we don't have DYNAMIC_FTRACE_WITH_REGS supported there. We should be able to get this working on ppc32 though. - Naveen
This is an early RFC series that adds support for BPF Trampolines on powerpc64. Some of the selftests are passing for me, but this needs more testing and I've likely missed a few things as well. A review of the patches and feedback about the overall approach will be great. This series depends on some of the other BPF JIT fixes and enhancements posted previously, as well as on ftrace direct enablement on powerpc which has also been posted in the past. - Naveen Naveen N. Rao (3): ftrace: Add ftrace_location_lookup() to lookup address of ftrace location powerpc/ftrace: Override ftrace_location_lookup() for MPROFILE_KERNEL powerpc64/bpf: Add support for bpf trampolines arch/powerpc/kernel/kprobes.c | 8 +- arch/powerpc/kernel/trace/ftrace.c | 11 + arch/powerpc/net/bpf_jit.h | 8 + arch/powerpc/net/bpf_jit_comp.c | 5 +- arch/powerpc/net/bpf_jit_comp64.c | 619 ++++++++++++++++++++++++++++- include/linux/ftrace.h | 5 + kernel/bpf/trampoline.c | 27 +- kernel/trace/ftrace.c | 14 + 8 files changed, 670 insertions(+), 27 deletions(-) base-commit: 33ecb3e590194051dc57eee1125c1d372b14c946 -- 2.34.1