diff options
| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2023-01-28 01:06:44 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-01-28 21:45:15 +0100 |
| commit | 49f67f393ff264e8d83f6fcec0728a6aa8eed102 (patch) | |
| tree | b3cad5557e5b3ade5b4d42bf63b14dddf66e49f5 /include | |
| parent | bpf: iterators: Split iterators.lskel.h into little- and big- endian versions (diff) | |
| download | linux-49f67f393ff264e8d83f6fcec0728a6aa8eed102.tar.xz linux-49f67f393ff264e8d83f6fcec0728a6aa8eed102.zip | |
bpf: btf: Add BTF_FMODEL_SIGNED_ARG flag
s390x eBPF JIT needs to know whether a function return value is signed
and which function arguments are signed, in order to generate code
compliant with the s390x ABI.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/r/20230128000650.1516334-26-iii@linux.ibm.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bpf.h | 4 | ||||
| -rw-r--r-- | include/linux/btf.h | 15 |
2 files changed, 14 insertions, 5 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 34551e4ebc72..c411c6bb86c4 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -899,8 +899,12 @@ enum bpf_cgroup_storage_type { /* The argument is a structure. */ #define BTF_FMODEL_STRUCT_ARG BIT(0) +/* The argument is signed. */ +#define BTF_FMODEL_SIGNED_ARG BIT(1) + struct btf_func_model { u8 ret_size; + u8 ret_flags; u8 nr_args; u8 arg_size[MAX_BPF_FUNC_ARGS]; u8 arg_flags[MAX_BPF_FUNC_ARGS]; diff --git a/include/linux/btf.h b/include/linux/btf.h index 5f628f323442..e9b90d9c3569 100644 --- a/include/linux/btf.h +++ b/include/linux/btf.h @@ -236,6 +236,16 @@ static inline bool btf_type_is_small_int(const struct btf_type *t) return btf_type_is_int(t) && t->size <= sizeof(u64); } +static inline u8 btf_int_encoding(const struct btf_type *t) +{ + return BTF_INT_ENCODING(*(u32 *)(t + 1)); +} + +static inline bool btf_type_is_signed_int(const struct btf_type *t) +{ + return btf_type_is_int(t) && (btf_int_encoding(t) & BTF_INT_SIGNED); +} + static inline bool btf_type_is_enum(const struct btf_type *t) { return BTF_INFO_KIND(t->info) == BTF_KIND_ENUM; @@ -306,11 +316,6 @@ static inline u8 btf_int_offset(const struct btf_type *t) return BTF_INT_OFFSET(*(u32 *)(t + 1)); } -static inline u8 btf_int_encoding(const struct btf_type *t) -{ - return BTF_INT_ENCODING(*(u32 *)(t + 1)); -} - static inline bool btf_type_is_scalar(const struct btf_type *t) { return btf_type_is_int(t) || btf_type_is_enum(t); |