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Groups > linux.kernel > #1273318
| From | Arnaldo Carvalho de Melo <acme@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 06/37] perf bpf: Add BPF_PROLOGUE config options for further patches |
| Date | 2015-11-19 19:00 +0100 |
| Message-ID | <qwBF0-44P-23@gated-at.bofh.it> (permalink) |
| References | <qwBEZ-44P-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Wang Nan <wangnan0@huawei.com>
If both LIBBPF and DWARF are detected, it is possible to create prologue
for eBPF programs to help them access kernel data. HAVE_BPF_PROLOGUE and
CONFIG_BPF_PROLOGUE are added as flags for this feature.
PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET is introduced in commit
63ab024a5b6f295ca17a293ad81b7c728f49a89a ("perf tools:
regs_query_register_offset() infrastructure"), which indicates that an
architecture supports converting name of a register to its offset in
'struct pt_regs'. Without this support, BPF_PROLOGUE should be turned
off.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1447675815-166222-9-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/config/Makefile | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index de89ec574361..6eb9a956a408 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
--
2.1.0
--
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[GIT PULL 00/37] perf/core improvements and fixes Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
[PATCH 31/37] perf callchain: Add count fields to struct callchain_node Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
Re: [PATCH 31/37] perf callchain: Add count fields to struct callchain_node Frederic Weisbecker <fweisbec@gmail.com> - 2015-11-23 15:40 +0100
Re: [PATCH 31/37] perf callchain: Add count fields to struct callchain_node Namhyung Kim <namhyung@kernel.org> - 2015-11-24 06:20 +0100
[PATCH 27/37] perf tools: Fix machine__create_kernel_maps to put kernel dso refcount Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
[PATCH 06/37] perf bpf: Add BPF_PROLOGUE config options for further patches Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
[PATCH 17/37] perf test: Print result for each LLVM subtest Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
[PATCH 30/37] perf callchain: Abstract callchain print function Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
[PATCH 10/37] perf bpf: Allow BPF program config probing options Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
[PATCH 35/37] perf hists browser: Support folded callchains Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
[PATCH 37/37] perf ui/gtk: Support folded callchains Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
[PATCH 36/37] perf ui/gtk: Support flat callchains Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
[PATCH 34/37] perf hists browser: Support flat callchains Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
Re: [PATCH 34/37] perf hists browser: Support flat callchains Frederic Weisbecker <fweisbec@gmail.com> - 2015-11-23 16:20 +0100
Re: [PATCH 34/37] perf hists browser: Support flat callchains Namhyung Kim <namhyung@kernel.org> - 2015-11-24 06:30 +0100
Re: [PATCH 34/37] perf hists browser: Support flat callchains Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com> - 2015-11-24 15:50 +0100
Re: [PATCH 34/37] perf hists browser: Support flat callchains Namhyung Kim <namhyung@kernel.org> - 2015-11-25 02:30 +0100
Re: [PATCH 34/37] perf hists browser: Support flat callchains Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com> - 2015-11-25 02:40 +0100
Re: [PATCH 34/37] perf hists browser: Support flat callchains Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com> - 2015-11-25 03:20 +0100
Re: [PATCH 34/37] perf hists browser: Support flat callchains Namhyung Kim <namhyung@kernel.org> - 2015-11-25 22:10 +0100
[PATCH 03/37] tools: Adopt memdup() from tools/perf, moving it to tools/lib/string.c Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
[PATCH 02/37] tools: Fix selftests_install Makefile rule Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
[PATCH 33/37] perf hists browser: Factor out hist_browser__show_callchain_list() Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
[PATCH 32/37] perf report: Add callchain value option Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:00 +0100
[PATCH 08/37] perf bpf: Allow BPF program attach to uprobe events Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 21/37] perf machine: Fix machine__findnew_module_map to put registered map Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 14/37] perf test: Fix 'perf test BPF' when it fails to find a suitable vmlinux Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 13/37] perf test: Test the BPF prologue adding infrastructure Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 16/37] perf tests: Pass the subtest index to each test routine Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 18/37] perf test: Print result for each BPF subtest Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 11/37] perf bpf: Add prologue for BPF programs for fetching arguments Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 19/37] perf test: Mute test cases error messages if verbose == 0 Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 22/37] perf machine: Fix machine__destroy_kernel_maps to drop vmlinux_maps references Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 12/37] perf bpf: Generate prologue for BPF programs Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 20/37] perf probe: Fix to free temporal Dwarf_Frame Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 25/37] perf tools: Fix to put new map after inserting to map_groups in dso__load_sym Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 28/37] perf machine: Fix machine__findnew_module_map to put dso Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 26/37] perf tools: Fix __dsos__addnew to put dso after adding it to the list Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 04/37] tools: Clone the kernel's strtobool function Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 23/37] perf machine: Fix to destroy kernel maps when machine exits Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
[PATCH 05/37] bpf tools: Load a program with different instances using preprocessor Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-19 19:10 +0100
RE: [GIT PULL 00/37] perf/core improvements and fixes 平松雅巳 / HIRAMATU，MASAMI <masami.hiramatsu.pt@hitachi.com> - 2015-11-20 11:10 +0100
Re: [GIT PULL 00/37] perf/core improvements and fixes 'Arnaldo Carvalho de Melo' <acme@kernel.org> - 2015-11-20 13:10 +0100
RE: [GIT PULL 00/37] perf/core improvements and fixes 平松雅巳 / HIRAMATU，MASAMI <masami.hiramatsu.pt@hitachi.com> - 2015-11-20 18:00 +0100
Re: [GIT PULL 00/37] perf/core improvements and fixes Ingo Molnar <mingo@kernel.org> - 2015-11-23 09:20 +0100
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