From patchwork Mon Dec 14 11:57:39 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wang Nan X-Patchwork-Id: 58344 Delivered-To: patch@linaro.org Received: by 10.112.73.68 with SMTP id j4csp1420528lbv; Mon, 14 Dec 2015 03:58:17 -0800 (PST) X-Received: by 10.66.144.65 with SMTP id sk1mr44257614pab.126.1450094297387; Mon, 14 Dec 2015 03:58:17 -0800 (PST) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 77si16891068pfo.231.2015.12.14.03.58.17; Mon, 14 Dec 2015 03:58:17 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752824AbbLNL6P (ORCPT + 28 others); Mon, 14 Dec 2015 06:58:15 -0500 Received: from szxga02-in.huawei.com ([119.145.14.65]:15943 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752740AbbLNL6O (ORCPT ); Mon, 14 Dec 2015 06:58:14 -0500 Received: from 172.24.1.48 (EHLO szxeml428-hub.china.huawei.com) ([172.24.1.48]) by szxrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CYA10847; Mon, 14 Dec 2015 19:57:54 +0800 (CST) Received: from linux-4hy3.site (10.107.193.248) by szxeml428-hub.china.huawei.com (10.82.67.183) with Microsoft SMTP Server id 14.3.235.1; Mon, 14 Dec 2015 19:57:44 +0800 From: Wang Nan To: CC: , , Wang Nan , Arnaldo Carvalho de Melo , "Alexei Starovoitov" , Jiri Olsa , Sukadev Bhattiprolu Subject: [PATCH v2] tools lib bpf: Support libbpf on PowerPC Date: Mon, 14 Dec 2015 11:57:39 +0000 Message-ID: <1450094259-123844-1-git-send-email-wangnan0@huawei.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1450090232-11437-1-git-send-email-naveen.n.rao@linux.vnet.ibm.com> References: <1450090232-11437-1-git-send-email-naveen.n.rao@linux.vnet.ibm.com> MIME-Version: 1.0 X-Originating-IP: [10.107.193.248] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020204.566EAEC3.0003, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 5977b84819cdf5843746b7342d6bfa99 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Support basic PowerPC compiling. Checks BPF syscall number, turn off libbpf building on platform doesn't support sys_bpf instead of blocking compiling. Reported-by: Naveen N. Rao Signed-off-by: Wang Nan Cc: Arnaldo Carvalho de Melo Cc: Alexei Starovoitov Cc: Jiri Olsa Cc: Sukadev Bhattiprolu --- v1 -> v2: __powerpc64__ -> __powerpc__. Code is from ./tools/perf/perf-sys.h, but not tested yet. Naveen, please help me try this patch on PPC. Thank you. --- tools/build/feature/test-bpf.c | 23 ++++++++++++++++++++++- tools/lib/bpf/bpf.c | 6 ++++-- 2 files changed, 26 insertions(+), 3 deletions(-) -- 1.8.3.4 -- 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/ diff --git a/tools/build/feature/test-bpf.c b/tools/build/feature/test-bpf.c index 062bac8..19497f7 100644 --- a/tools/build/feature/test-bpf.c +++ b/tools/build/feature/test-bpf.c @@ -1,9 +1,26 @@ +#include #include +#include + +#ifndef __NR_bpf +# if defined(__i386__) +# define __NR_bpf 357 +# elif defined(__x86_64__) +# define __NR_bpf 321 +# elif defined(__aarch64__) +# define __NR_bpf 280 +# elif defined(__powerpc__) +# define __NR_bpf 361 +# else +# error __NR_bpf not defined. libbpf does not support your arch. +# endif +#endif int main(void) { union bpf_attr attr; + /* Check fields in attr */ attr.prog_type = BPF_PROG_TYPE_KPROBE; attr.insn_cnt = 0; attr.insns = 0; @@ -14,5 +31,9 @@ int main(void) attr.kern_version = 0; attr = attr; - return 0; + /* + * Test existance of __NR_bpf and BPF_PROG_LOAD. + * This call should fail if we run the testcase. + */ + return syscall(__NR_bpf, BPF_PROG_LOAD, attr, sizeof(attr)); } diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 5bdc6ea..fd25c58 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -14,8 +14,8 @@ #include "bpf.h" /* - * When building perf, unistd.h is override. Define __NR_bpf is - * required to be defined. + * When building perf, unistd.h is overrided. __NR_bpf is + * required to be defined explicitly. */ #ifndef __NR_bpf # if defined(__i386__) @@ -24,6 +24,8 @@ # define __NR_bpf 321 # elif defined(__aarch64__) # define __NR_bpf 280 +# elif defined(__powerpc__) +# define __NR_bpf 361 # else # error __NR_bpf not defined. libbpf does not support your arch. # endif