On Thu, Jul 24, 2025 at 7:19 AM Chenghao Duan <duanchenghao@xxxxxxxxxx> wrote: > > v4: > 1. Delete the #3 patch of version V3. > > 2. Add 5 NOP instructions in build_prologue(). > Reserve space for the move_imm + jirl instruction. > > 3. Differentiate between direct jumps and ftrace jumps of trampoline: > direct jumps skip 5 instructions. > ftrace jumps skip 2 instructions. > > 4. Remove the generation of BL jump instructions in emit_jump_and_link(). > After the trampoline ends, it will jump to the specified register. > The BL instruction writes PC+4 to r1 instead of allowing the > specification of rd. > > ----------------------------------------------------------------------- > Historical Version: > v3: > 1. Patch 0003 adds EXECMEM_BPF memory type to the execmem subsystem. > > 2. Align the size calculated by arch_bpf_trampoline_size to page > boundaries. > > 3. Add the flush icache operation to larch_insn_text_copy. > > 4. Unify the implementation of bpf_arch_xxx into the patch > "0004-LoongArch-BPF-Add-bpf_arch_xxxxx-support-for-Loong.patch". > > 5. Change the patch order. Move the patch > "0002-LoongArch-BPF-Update-the-code-to-rename-validate_.patch" before > "0005-LoongArch-BPF-Add-bpf-trampoline-support-for-Loon.patch". > > URL for version v3: > https://lore.kernel.org/all/20250709055029.723243-1-duanchenghao@xxxxxxxxxx/ > --------- > v2: > 1. Change the fixmap in the instruction copy function to set_memory_xxx. > > 2. Change the implementation method of the following code. > - arch_alloc_bpf_trampoline > - arch_free_bpf_trampoline > Use the BPF core's allocation and free functions. > > - bpf_arch_text_invalidate > Operate with the function larch_insn_text_copy that carries > memory attribute modifications. > > 3. Correct the incorrect code formatting. > > URL for version v2: > https://lore.kernel.org/all/20250618105048.1510560-1-duanchenghao@xxxxxxxxxx/ > --------- > v1: > Support trampoline for LoongArch. The following feature tests have been > completed: > 1. fentry > 2. fexit > 3. fmod_ret > > TODO: The support for the struct_ops feature will be provided in > subsequent patches. > > URL for version v1: > https://lore.kernel.org/all/20250611035952.111182-1-duanchenghao@xxxxxxxxxx/ > ----------------------------------------------------------------------- > > Chenghao Duan (4): > LoongArch: Add larch_insn_gen_{beq,bne} helpers > LoongArch: BPF: Update the code to rename validate_code to > validate_ctx > LoongArch: BPF: Add bpf_arch_xxxxx support for Loongarch > LoongArch: BPF: Add bpf trampoline support for Loongarch > > Tiezhu Yang (1): > LoongArch: BPF: Add struct ops support for trampoline > > arch/loongarch/include/asm/inst.h | 3 + > arch/loongarch/kernel/inst.c | 60 ++++ > arch/loongarch/net/bpf_jit.c | 521 +++++++++++++++++++++++++++++- > arch/loongarch/net/bpf_jit.h | 6 + > 4 files changed, 589 insertions(+), 1 deletion(-) > > -- > 2.25.1 > Tested the whole patch series and it resolved the xdp-tool xdp-filter issue [root@fedora ~]# xdp-loader status CURRENT XDP PROGRAM STATUS: Interface Prio Program name Mode ID Tag Chain actions -------------------------------------------------------------------------------------- lo xdp_dispatcher skb 53 4d7e87c0d30db711 => 10 xdpfilt_alw_all 62 320c53c06933a8fa XDP_PASS dummy0 <No XDP program loaded!> sit0 <No XDP program loaded!> enp0s3f0 <No XDP program loaded!> wlp3s0 <No XDP program loaded!> you can add Tested-by: Vincent Li <vincent.mc.li@xxxxxxxxx>
