From: Brendan Jackman <jackmanb@google.com>
To: bpf@vger.kernel.org
Cc: Alexei Starovoitov <ast@kernel.org>, Yonghong Song <yhs@fb.com>,
Daniel Borkmann <daniel@iogearbox.net>,
KP Singh <kpsingh@chromium.org>,
Florent Revest <revest@chromium.org>,
linux-kernel@vger.kernel.org, Jann Horn <jannh@google.com>,
Brendan Jackman <jackmanb@google.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Jiri Olsa <jolsa@kernel.org>,
Quentin Monnet <quentin@isovalent.com>,
"Frank Ch. Eigler" <fche@redhat.com>,
Stephane Eranian <eranian@google.com>,
Namhyung Kim <namhyung@kernel.org>,
Thomas Hebb <tommyhebb@gmail.com>
Subject: [PATCH bpf-next v3 11/14] tools build: Implement feature check for BPF atomics in Clang
Date: Thu, 3 Dec 2020 16:02:42 +0000 [thread overview]
Message-ID: <20201203160245.1014867-12-jackmanb@google.com> (raw)
In-Reply-To: <20201203160245.1014867-1-jackmanb@google.com>
Change-Id: Ia15bb76f7152fff2974e38242d7430ce2987a71e
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Quentin Monnet <quentin@isovalent.com>
Cc: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Hebb <tommyhebb@gmail.com>
Change-Id: Ie2c3832eaf050d627764071d1927c7546e7c4b4b
Signed-off-by: Brendan Jackman <jackmanb@google.com>
---
tools/build/feature/Makefile | 4 ++++
tools/build/feature/test-clang-bpf-atomics.c | 9 +++++++++
2 files changed, 13 insertions(+)
create mode 100644 tools/build/feature/test-clang-bpf-atomics.c
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index cdde783f3018..81370d7fa193 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -70,6 +70,7 @@ FILES= \
test-libaio.bin \
test-libzstd.bin \
test-clang-bpf-co-re.bin \
+ test-clang-bpf-atomics.bin \
test-file-handle.bin \
test-libpfm4.bin
@@ -331,6 +332,9 @@ $(OUTPUT)test-clang-bpf-co-re.bin:
$(CLANG) -S -g -target bpf -o - $(patsubst %.bin,%.c,$(@F)) | \
grep BTF_KIND_VAR
+$(OUTPUT)test-clang-bpf-atomics.bin:
+ $(CLANG) -S -g -target bpf -mcpu=v3 -Werror=implicit-function-declaration -o - $(patsubst %.bin,%.c,$(@F)) 2>&1
+
$(OUTPUT)test-file-handle.bin:
$(BUILD)
diff --git a/tools/build/feature/test-clang-bpf-atomics.c b/tools/build/feature/test-clang-bpf-atomics.c
new file mode 100644
index 000000000000..8b5fcdd4ba6f
--- /dev/null
+++ b/tools/build/feature/test-clang-bpf-atomics.c
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2020 Google
+
+int x = 0;
+
+int foo(void)
+{
+ return __sync_val_compare_and_swap(&x, 1, 2);
+}
--
2.29.2.454.gaff20da3a2-goog
next prev parent reply other threads:[~2020-12-03 16:05 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-03 16:02 [PATCH bpf-next v3 00/14] Atomics for eBPF Brendan Jackman
2020-12-03 16:02 ` [PATCH bpf-next v3 01/14] bpf: x86: Factor out emission of ModR/M for *(reg + off) Brendan Jackman
2020-12-03 16:02 ` [PATCH bpf-next v3 02/14] bpf: x86: Factor out emission of REX byte Brendan Jackman
2020-12-03 16:02 ` [PATCH bpf-next v3 03/14] bpf: x86: Factor out function to emit NEG Brendan Jackman
2020-12-03 16:02 ` [PATCH bpf-next v3 04/14] bpf: x86: Factor out a lookup table for some ALU opcodes Brendan Jackman
2020-12-03 16:02 ` [PATCH bpf-next v3 05/14] bpf: Rename BPF_XADD and prepare to encode other atomics in .imm Brendan Jackman
2020-12-04 4:49 ` Yonghong Song
2020-12-03 16:02 ` [PATCH bpf-next v3 06/14] bpf: Move BPF_STX reserved field check into BPF_STX verifier code Brendan Jackman
2020-12-04 4:51 ` Yonghong Song
2020-12-03 16:02 ` [PATCH bpf-next v3 07/14] bpf: Add BPF_FETCH field / create atomic_fetch_add instruction Brendan Jackman
2020-12-04 5:02 ` Yonghong Song
2020-12-04 5:27 ` Yonghong Song
2020-12-04 9:12 ` Brendan Jackman
2020-12-03 16:02 ` [PATCH bpf-next v3 08/14] bpf: Add instructions for atomic_[cmp]xchg Brendan Jackman
2020-12-04 5:34 ` Yonghong Song
2020-12-04 9:26 ` Brendan Jackman
2020-12-03 16:02 ` [PATCH bpf-next v3 09/14] bpf: Pull out a macro for interpreting atomic ALU operations Brendan Jackman
2020-12-04 6:30 ` Yonghong Song
2020-12-04 9:29 ` Brendan Jackman
2020-12-04 15:20 ` Yonghong Song
2020-12-03 16:02 ` [PATCH bpf-next v3 10/14] bpf: Add bitwise atomic instructions Brendan Jackman
2020-12-04 6:42 ` Yonghong Song
2020-12-04 9:36 ` Brendan Jackman
2020-12-04 15:21 ` Yonghong Song
2020-12-07 11:28 ` Brendan Jackman
2020-12-07 15:58 ` Yonghong Song
2020-12-07 16:14 ` Brendan Jackman
2020-12-03 16:02 ` Brendan Jackman [this message]
2020-12-03 21:02 ` [PATCH bpf-next v3 11/14] tools build: Implement feature check for BPF atomics in Clang Andrii Nakryiko
2020-12-03 16:02 ` [PATCH bpf-next v3 12/14] bpf: Pull tools/build/feature biz into selftests Makefile Brendan Jackman
2020-12-03 21:01 ` Andrii Nakryiko
2020-12-04 9:41 ` Brendan Jackman
2020-12-04 19:00 ` Andrii Nakryiko
2020-12-07 11:00 ` Brendan Jackman
2020-12-08 2:19 ` Andrii Nakryiko
2020-12-08 17:04 ` Brendan Jackman
2020-12-08 18:31 ` Andrii Nakryiko
2020-12-03 16:02 ` [PATCH bpf-next v3 13/14] bpf: Add tests for new BPF atomic operations Brendan Jackman
2020-12-04 7:06 ` Yonghong Song
2020-12-04 9:45 ` Brendan Jackman
2020-12-04 15:28 ` Yonghong Song
2020-12-04 19:49 ` Andrii Nakryiko
2020-12-07 15:48 ` Brendan Jackman
2020-12-03 16:02 ` [PATCH bpf-next v3 14/14] bpf: Document new atomic instructions Brendan Jackman
2020-12-03 16:10 ` [PATCH bpf-next v3 00/14] Atomics for eBPF Brendan Jackman
2020-12-04 4:46 ` Yonghong Song
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