| Message ID | 20220812052424.521379-1-yhs@fb.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Delegated to: | BPF |
| Headers | show |
| Series | bpf: Support struct argument for trampoline base progs | expand |
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index a627a02cf8ab..2d3099fb5a0a 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -726,10 +726,14 @@ enum bpf_cgroup_storage_type { */ #define MAX_BPF_FUNC_REG_ARGS 5 +/* The argument is a structure. */ +#define BTF_FMODEL_STRUCT_ARG BIT(0) + struct btf_func_model { u8 ret_size; u8 nr_args; u8 arg_size[MAX_BPF_FUNC_ARGS]; + u8 arg_flags[MAX_BPF_FUNC_ARGS]; }; /* Restore arguments before returning from trampoline to let original function
Add arg_flags for additional information about arguments in btf_func_model. Currently, only whether an argument is a structure or not is recorded. Such information will be used in arch specific function arch_prepare_bpf_trampoline() to prepare argument access properly in trampoline. Signed-off-by: Yonghong Song <yhs@fb.com> --- include/linux/bpf.h | 4 ++++ 1 file changed, 4 insertions(+)