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[73.53.94.119]) by smtp.gmail.com with ESMTPSA id u3sm133912pfn.217.2020.05.05.17.03.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 May 2020 17:03:29 -0700 (PDT) From: Luke Nelson X-Google-Original-From: Luke Nelson To: bpf@vger.kernel.org Cc: Luke Nelson , Xi Wang , =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , Andrii Nakryiko , John Fastabend , KP Singh , netdev@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH bpf-next 0/4] RV64 BPF JIT Optimizations Date: Tue, 5 May 2020 17:03:16 -0700 Message-Id: <20200506000320.28965-1-luke.r.nels@gmail.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch series introduces a set of optimizations to the BPF JIT on RV64. The optimizations are related to the verifier zero-extension optimization and BPF_JMP BPF_K. We tested the optimizations on a QEMU riscv64 virt machine, using lib/test_bpf and test_verifier, and formally verified their correctness using Serval. Luke Nelson (4): bpf, riscv: Enable missing verifier_zext optimizations on RV64 bpf, riscv: Optimize FROM_LE using verifier_zext on RV64 bpf, riscv: Optimize BPF_JMP BPF_K when imm == 0 on RV64 bpf, riscv: Optimize BPF_JSET BPF_K using andi on RV64 arch/riscv/net/bpf_jit_comp64.c | 64 ++++++++++++++++++++++----------- 1 file changed, 44 insertions(+), 20 deletions(-) Cc: Xi Wang -- 2.17.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6179BC47247 for ; Wed, 6 May 2020 00:03:39 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 32BFE2073B for ; Wed, 6 May 2020 00:03:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="sPbm9ox4"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=cs.washington.edu header.i=@cs.washington.edu header.b="hBEgU4DY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 32BFE2073B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=cs.washington.edu Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=JxRTwli/svDqnOaBY0adT76Z0FFG8KkHdubVGApAA6g=; b=sPbm9ox4l/gBdpqSeMxnaDNU3O s8H1BwIk5rCf6YJYK7xs3vrAzgGMzAZWhmMcBKZ9uGn3PoJRo10ZT6jEUNvGBvqcWrGPj/smKN9do Jg9es2S6UZIUWzJyohyxwbrgM2ugP8I65O6JEeXOd9xiZhkoMqULMG0BwaJvnQUBba3fo/FqC0hOO 1qqoLD2hqSEbpOXJdLnp2vyTGhSGYOc8nYPaQrdlWcD5LrvlCmlSv6dTQ7aV/Lz9pgS6vnJMvCjBM Vi7ySxNjQKDKPwS4tYjkJt9BpYk47qZAMfHaIH0XUb11OaG1ZxAcGCXW/rrRBW2H+rqAu5WebpB7I moAticdA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jW7XD-0007gn-Gv; Wed, 06 May 2020 00:03:35 +0000 Received: from mail-pl1-x644.google.com ([2607:f8b0:4864:20::644]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jW7X9-0007dd-Dy for linux-riscv@lists.infradead.org; Wed, 06 May 2020 00:03:33 +0000 Received: by mail-pl1-x644.google.com with SMTP id s20so1542500plp.6 for ; Tue, 05 May 2020 17:03:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cs.washington.edu; s=goo201206; h=from:to:cc:subject:date:message-id; bh=JxRTwli/svDqnOaBY0adT76Z0FFG8KkHdubVGApAA6g=; b=hBEgU4DYNOg3qWU84rnU6AnFuKR981yS5BSoO3R/amg38P+jgdPsMbTP70YKHF3J76 ISfsmEBfrEtrkGLH2pkRg7Fe4lYwDNiRfjMrZkkcqUv2DWOZbq2+54F9b9bHiIE2Av7l 8JnrloZFVv4BenXnGU9ff7pMXJwzMJFAUgcIs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=JxRTwli/svDqnOaBY0adT76Z0FFG8KkHdubVGApAA6g=; b=FzlQ+wGDKBoTC5e9lJf9QDUAylR3tISu4KRo47S8Ua7TF4CAjkZ4J0nomqJQ83Kbh2 ecub+D8rtDw2YwxlIVTxca+5TFAaJ9MLlulGwOIAm18b8EmXjU4u3TeUjlU+AADhZnYV CeDn+o3LlWmELjo3iTmnoQ8P8AC9NB1FKOZppwxvgzU4Qr6kQIfNGk7Rm47GFOge5EaK FKMaLTNHPCJHlYYgJhdDd2YenaURi7ur8zV1sdrrI87rybpXg0rvFM9EPyMdmfijrOs2 kafH1C5AP3cbf5SGbKdVcLhP3WH27TcCtbc8wAR4VwZHAPPuO2Kn3prp0EZnnh39oyjD /f5A== X-Gm-Message-State: AGi0PuZFCwT3uMQ9EBW9JIXi+r1XrNoBiJTsjBPKJiWfNm5c13gIXscN d4wTL/d/oK6Yt2q6Gnr5OHn6wQ== X-Google-Smtp-Source: APiQypL3GD15VTzPevJlQEL2Gpk1YRyV1HsaesDcgEeoRusw+eAllZFZbBCvSxvf7cmk2/iAjHnNkQ== X-Received: by 2002:a17:902:a40b:: with SMTP id p11mr5668144plq.304.1588723410355; Tue, 05 May 2020 17:03:30 -0700 (PDT) Received: from localhost.localdomain (c-73-53-94-119.hsd1.wa.comcast.net. [73.53.94.119]) by smtp.gmail.com with ESMTPSA id u3sm133912pfn.217.2020.05.05.17.03.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 May 2020 17:03:29 -0700 (PDT) From: Luke Nelson X-Google-Original-From: Luke Nelson To: bpf@vger.kernel.org Subject: [PATCH bpf-next 0/4] RV64 BPF JIT Optimizations Date: Tue, 5 May 2020 17:03:16 -0700 Message-Id: <20200506000320.28965-1-luke.r.nels@gmail.com> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200505_170331_489685_DE4008AF X-CRM114-Status: UNSURE ( 5.69 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Song Liu , Albert Ou , Daniel Borkmann , Luke Nelson , =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , John Fastabend , Alexei Starovoitov , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Palmer Dabbelt , Paul Walmsley , KP Singh , Yonghong Song , linux-riscv@lists.infradead.org, Andrii Nakryiko , Martin KaFai Lau , Xi Wang Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org This patch series introduces a set of optimizations to the BPF JIT on RV64. The optimizations are related to the verifier zero-extension optimization and BPF_JMP BPF_K. We tested the optimizations on a QEMU riscv64 virt machine, using lib/test_bpf and test_verifier, and formally verified their correctness using Serval. Luke Nelson (4): bpf, riscv: Enable missing verifier_zext optimizations on RV64 bpf, riscv: Optimize FROM_LE using verifier_zext on RV64 bpf, riscv: Optimize BPF_JMP BPF_K when imm == 0 on RV64 bpf, riscv: Optimize BPF_JSET BPF_K using andi on RV64 arch/riscv/net/bpf_jit_comp64.c | 64 ++++++++++++++++++++++----------- 1 file changed, 44 insertions(+), 20 deletions(-) Cc: Xi Wang -- 2.17.1