From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752158AbdFOWfw (ORCPT ); Thu, 15 Jun 2017 18:35:52 -0400 Received: from mail-co1nam03on0076.outbound.protection.outlook.com ([104.47.40.76]:5608 "EHLO NAM03-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751546AbdFOWft (ORCPT ); Thu, 15 Jun 2017 18:35:49 -0400 Authentication-Results: kernel.org; dkim=none (message not signed) header.d=none;kernel.org; dmarc=none action=none header.from=cavium.com; From: David Daney To: Alexei Starovoitov , Daniel Borkmann , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@linux-mips.org, ralf@linux-mips.org, Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org Cc: David Daney Subject: [PATCH RFC 0/3] bpf/arm64/mips: Avoid inline asm in BPF Date: Thu, 15 Jun 2017 15:35:40 -0700 Message-Id: <20170615223543.22867-1-david.daney@cavium.com> X-Mailer: git-send-email 2.9.4 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [50.233.148.156] X-ClientProxiedBy: CO2PR07CA0070.namprd07.prod.outlook.com (10.174.192.38) To MWHPR07MB3501.namprd07.prod.outlook.com (10.164.192.28) X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWHPR07MB3501: X-MS-Office365-Filtering-Correlation-Id: 60bc8fd8-01bb-4140-919a-08d4b43ede19 X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:(22001)(201703131423075)(201703031133081);SRVR:MWHPR07MB3501; 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Looking at the code, it seems that arm64 had the same problem and avoided it by defining the header guard symbol. This approach does not scale, so I invented a preprocessor define to identify the case of building with a BPF target that can be used instead. It is an RFC at this point as I haven't yet tested the arm64 change, and I wanted to see if others think this is the proper way to handle avoidance of inline asm. David Daney (3): arm64: Gate inclusion of asm/sysreg.h by __EMITTING_BPF__ samples/bpf: Add define __EMITTING_BPF__ when building BPF MIPS: Include file changes to enable building BPF code with llvm arch/arm64/include/asm/sysreg.h | 4 +++- arch/mips/Makefile | 1 + arch/mips/cavium-octeon/Platform | 3 +++ arch/mips/include/asm/checksum.h | 2 +- arch/mips/include/uapi/asm/swab.h | 2 +- samples/bpf/Makefile | 8 ++++---- 6 files changed, 13 insertions(+), 7 deletions(-) -- 2.11.0