From: Sean Young <sean@mess.org>
To: "Yonghong Song" <yhs@fb.com>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Andrii Nakryiko" <andrii@kernel.org>,
"Martin KaFai Lau" <kafai@fb.com>,
"Song Liu" <songliubraving@fb.com>,
"John Fastabend" <john.fastabend@gmail.com>,
"KP Singh" <kpsingh@kernel.org>,
"Nathan Chancellor" <natechancellor@gmail.com>,
"Nick Desaulniers" <ndesaulniers@google.com>,
"Quentin Monnet" <quentin@isovalent.com>,
"Toke Høiland-Jørgensen" <toke@redhat.com>,
linux-doc@vger.kernel.org, netdev@vger.kernel.org,
bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
clang-built-linux@googlegroups.com
Subject: [PATCH v3 2/4] libbpf: add support for ints larger than 128 bits
Date: Tue, 5 Jan 2021 14:45:32 +0000 [thread overview]
Message-ID: <3d3f8d4cc59b61d42e05d5f66d7b29fc7eb20cfa.1609855479.git.sean@mess.org> (raw)
In-Reply-To: <cover.1609855479.git.sean@mess.org>
clang supports arbitrary length ints using the _ExtInt extension. This
can be useful to hold very large values, e.g. 256 bit or 512 bit types.
This requires the _ExtInt extension enabled in clang, which is under
review.
Link: https://clang.llvm.org/docs/LanguageExtensions.html#extended-integer-types
Link: https://reviews.llvm.org/D93103
Signed-off-by: Sean Young <sean@mess.org>
---
tools/lib/bpf/btf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 3c3f2bc6c652..a676373f052b 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -1722,7 +1722,7 @@ int btf__add_int(struct btf *btf, const char *name, size_t byte_sz, int encoding
if (!name || !name[0])
return -EINVAL;
/* byte_sz must be power of 2 */
- if (!byte_sz || (byte_sz & (byte_sz - 1)) || byte_sz > 16)
+ if (!byte_sz || (byte_sz & (byte_sz - 1)) || byte_sz > 64)
return -EINVAL;
if (encoding & ~(BTF_INT_SIGNED | BTF_INT_CHAR | BTF_INT_BOOL))
return -EINVAL;
--
2.29.2
next prev parent reply other threads:[~2021-01-05 14:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-05 14:45 [PATCH v3 0/4] btf: support " Sean Young
2021-01-05 14:45 ` [PATCH v3 1/4] btf: add support for " Sean Young
2021-01-06 5:10 ` Andrii Nakryiko
2021-01-06 5:16 ` Andrii Nakryiko
2021-01-05 14:45 ` Sean Young [this message]
2021-01-05 14:45 ` [PATCH v3 3/4] bpftool: " Sean Young
2021-01-06 5:13 ` Andrii Nakryiko
2021-01-05 14:45 ` [PATCH v3 4/4] bpf: add tests " Sean Young
2021-01-06 5:26 ` Andrii Nakryiko
2021-01-05 19:51 ` [PATCH v3 0/4] btf: support " Martin KaFai Lau
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