On 2025/8/21 下午5:10, Hengqi Chen wrote:
The current implementation does not support struct argument.
...
Reject it for now.
Fixes: f9b6b41f0cf3 ("LoongArch: BPF: Add basic bpf trampoline support")
Signed-off-by: Hengqi Chen <hengqi.chen@xxxxxxxxx>
---
arch/loongarch/net/bpf_jit.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/loongarch/net/bpf_jit.c b/arch/loongarch/net/bpf_jit.c
index 6754e5231ece..a87f51f5b708 100644
--- a/arch/loongarch/net/bpf_jit.c
+++ b/arch/loongarch/net/bpf_jit.c
@@ -1516,6 +1516,12 @@ static int __arch_prepare_bpf_trampoline(struct jit_ctx *ctx, struct bpf_tramp_i
if (m->nr_args > LOONGARCH_MAX_REG_ARGS)
return -ENOTSUPP;
+ /* don't support struct argument */
+ for (i = 0; i < m->nr_args; i++) {
+ if (m->arg_flags[i] & BTF_FMODEL_STRUCT_ARG)
+ return -ENOTSUPP;
+ }
+
Acked-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>
Tested-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>
By the way, I have 2 patches locally, one patch is to implement this
feature, but there exist some other problems now, maybe it is related
with the following failed testcase:
sudo ./test_progs -t module_attach
Anyway, I will send a RFC series later for your review.
Thanks,
Tiezhu
