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authorYonghong Song <yhs@fb.com>2022-08-31 18:27:02 +0300
committerAlexei Starovoitov <ast@kernel.org>2022-09-07 05:51:14 +0300
commiteb707dde264af5eb0271156d7fbd59133fa02cac (patch)
tree477b3478c53aeea2be2f82bc415998307cb85ad8 /arch/arm64/net
parent27ed9353aec9de4277b3389c9f2b04beb6ab7622 (diff)
downloadlinux-eb707dde264af5eb0271156d7fbd59133fa02cac.tar.xz
bpf: arm64: No support of struct argument in trampoline programs
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>
Diffstat (limited to 'arch/arm64/net')
-rw-r--r--arch/arm64/net/bpf_jit_comp.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
index 389623ae5a91..30f76178608b 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -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;