From: Wang Nan <wangnan0@huawei.com>
To: <acme@redhat.com>
Cc: <linux-kernel@vger.kernel.org>, <pi3orama@163.com>,
Wang Nan <wangnan0@huawei.com>,
Alexei Starovoitov <ast@plumgrid.com>,
Brendan Gregg <brendan.d.gregg@gmail.com>,
Daniel Borkmann <daniel@iogearbox.net>,
"David Ahern" <dsahern@gmail.com>, He Kuang <hekuang@huawei.com>,
Jiri Olsa <jolsa@kernel.org>, Kaixu Xia <xiakaixu@huawei.com>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Namhyung Kim <namhyung@kernel.org>,
"Paul Mackerras" <paulus@samba.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Zefan Li <lizefan@huawei.com>
Subject: [PATCH 13/22] perf tools: Add BPF_PROLOGUE config options for further patches
Date: Wed, 23 Sep 2015 11:22:34 +0000 [thread overview]
Message-ID: <1443007363-124182-14-git-send-email-wangnan0@huawei.com> (raw)
In-Reply-To: <1443007363-124182-1-git-send-email-wangnan0@huawei.com>
If both LIBBPF and DWARF are detected, it is possible to create prologue
for eBPF programs to help them accessing kernel data. HAVE_BPF_PROLOGUE
and CONFIG_BPF_PROLOGUE is added as flags for this feature.
PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET indicates an architecture
supports converting name of a register to its offset in
'struct pt_regs'. Without this support, BPF_PROLOGUE should be turned off.
HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET is introduced as the corresponding
CFLAGS of PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kaixu Xia <xiakaixu@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: http://lkml.kernel.org/n/ebpf-6yw9eg0ej3l4jnqhinngkw86@git.kernel.org
---
tools/perf/config/Makefile | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index de89ec5..6eb9a95 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -318,6 +318,18 @@ ifndef NO_LIBELF
CFLAGS += -DHAVE_LIBBPF_SUPPORT
$(call detected,CONFIG_LIBBPF)
endif
+
+ ifndef NO_DWARF
+ ifdef PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET
+ CFLAGS += -DHAVE_BPF_PROLOGUE
+ $(call detected,CONFIG_BPF_PROLOGUE)
+ else
+ msg := $(warning BPF prologue is not supported by architecture $(ARCH), missing regs_query_register_offset());
+ endif
+ else
+ msg := $(warning DWARF support is off, BPF prologue is disabled);
+ endif
+
endif # NO_LIBBPF
endif # NO_LIBELF
--
1.8.3.4
next prev parent reply other threads:[~2015-09-23 11:23 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-23 11:22 [GIT PULL 00/22] perf tools: filtering events using eBPF programs Wang Nan
2015-09-23 11:22 ` [PATCH 01/22] perf ebpf: Add the libbpf glue Wang Nan
2015-09-23 11:22 ` [PATCH 02/22] perf tools: Enable passing bpf object file to --event Wang Nan
2015-09-23 11:22 ` [PATCH 03/22] perf record, bpf: Create probe points for BPF programs Wang Nan
2015-09-23 11:22 ` [PATCH 04/22] perf record: Load eBPF object into kernel Wang Nan
2015-09-23 11:22 ` [PATCH 05/22] perf tools: Collect perf_evsel in BPF object files Wang Nan
2015-09-23 11:22 ` [PATCH 06/22] perf tools: Attach eBPF program to perf event Wang Nan
2015-09-23 11:22 ` [PATCH 07/22] perf record: Add clang options for compiling BPF scripts Wang Nan
2015-09-23 11:22 ` [PATCH 08/22] perf tools: Compile scriptlets to BPF objects when passing '.c' to --event Wang Nan
2015-09-23 11:22 ` [PATCH 09/22] perf test: Enforce LLVM test for BPF test Wang Nan
2015-09-23 11:22 ` [PATCH 10/22] perf test: Add 'perf test BPF' Wang Nan
2015-09-23 11:22 ` [PATCH 11/22] perf probe: Reset args and nargs for probe_trace_event when failure Wang Nan
2015-09-23 11:22 ` [PATCH 12/22] bpf tools: Load a program with different instances using preprocessor Wang Nan
2015-09-23 11:22 ` Wang Nan [this message]
2015-09-23 11:22 ` [PATCH 14/22] perf tools: Compile dwarf-regs.c if CONFIG_BPF_PROLOGUE is on Wang Nan
2015-09-23 11:22 ` [PATCH 15/22] perf tools: Add prologue for BPF programs for fetching arguments Wang Nan
2015-09-23 11:22 ` [PATCH 16/22] perf tools: Generate prologue for BPF programs Wang Nan
2015-09-23 11:22 ` [PATCH 17/22] perf tools: Use same BPF program if arguments are identical Wang Nan
2015-09-23 11:22 ` [PATCH 18/22] perf record: Support custom vmlinux path Wang Nan
2015-09-23 11:22 ` [PATCH 19/22] perf tools: Allow BPF program attach to uprobe events Wang Nan
2015-09-23 11:22 ` [PATCH 20/22] perf test: Enforce LLVM test, add kbuild test Wang Nan
2015-09-23 11:22 ` [PATCH 21/22] perf test: Test BPF prologue Wang Nan
2015-09-23 11:22 ` [PATCH 22/22] perf probe: Fix module probing with shortname Wang Nan
2015-09-23 13:46 ` [GIT PULL 00/22] perf tools: filtering events using eBPF programs Arnaldo Carvalho de Melo
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