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bpf: arm64: No support of struct argument in trampoline programs

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ARM64 does not support struct argument for trampoline based
bpf programs yet.

Signed-off-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20220831152702.2079066-1-yhs@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Yonghong Song 2022-08-31 08:27:02 -07:00 committed by Alexei Starovoitov
parent 27ed9353ae
commit eb707dde26
1 changed files with 7 additions and 1 deletions
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8
arch/arm64/net/bpf_jit_comp.c
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@ -1970,7 +1970,7 @@ int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image,
u32 flags, struct bpf_tramp_links *tlinks,
void *orig_call)
{
int ret;
int i, ret;
int nargs = m->nr_args;
int max_insns = ((long)image_end - (long)image) / AARCH64_INSN_SIZE;
struct jit_ctx ctx = {
@ -1982,6 +1982,12 @@ int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image,
if (nargs > 8)
return -ENOTSUPP;
/* don't support struct argument */
for (i = 0; i < MAX_BPF_FUNC_ARGS; i++) {
if (m->arg_flags[i] & BTF_FMODEL_STRUCT_ARG)
return -ENOTSUPP;
}
ret = prepare_trampoline(&ctx, im, tlinks, orig_call, nargs, flags);
if (ret < 0)
return ret;