Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752098AbbKWQGY (ORCPT ); Mon, 23 Nov 2015 11:06:24 -0500 Received: from terminus.zytor.com ([198.137.202.10]:43691 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751380AbbKWQGU (ORCPT ); Mon, 23 Nov 2015 11:06:20 -0500 Date: Mon, 23 Nov 2015 08:05:33 -0800 From: tip-bot for Wang Nan Message-ID: Cc: mingo@kernel.org, acme@redhat.com, wangnan0@huawei.com, lizefan@huawei.com, masami.hiramatsu.pt@hitachi.com, linux-kernel@vger.kernel.org, ast@kernel.org, tglx@linutronix.de, hpa@zytor.com Reply-To: wangnan0@huawei.com, lizefan@huawei.com, mingo@kernel.org, acme@redhat.com, tglx@linutronix.de, hpa@zytor.com, masami.hiramatsu.pt@hitachi.com, linux-kernel@vger.kernel.org, ast@kernel.org In-Reply-To: <1447675815-166222-9-git-send-email-wangnan0@huawei.com> References: <1447675815-166222-9-git-send-email-wangnan0@huawei.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf bpf: Add BPF_PROLOGUE config options for further patches Git-Commit-ID: 1c0ed63239012aa881cc811f726b549dca7279e4 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2330 Lines: 59 Commit-ID: 1c0ed63239012aa881cc811f726b549dca7279e4 Gitweb: http://git.kernel.org/tip/1c0ed63239012aa881cc811f726b549dca7279e4 Author: Wang Nan AuthorDate: Mon, 16 Nov 2015 12:10:10 +0000 Committer: Arnaldo Carvalho de Melo CommitDate: Wed, 18 Nov 2015 17:51:03 -0300 perf bpf: Add BPF_PROLOGUE config options for further patches 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 Cc: Alexei Starovoitov Cc: Masami Hiramatsu Cc: Zefan Li 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 --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/