From patchwork Wed May 6 00:03:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Luke Nelson X-Patchwork-Id: 1283999 Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=cs.washington.edu Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=cs.washington.edu header.i=@cs.washington.edu header.a=rsa-sha256 header.s=goo201206 header.b=hBEgU4DY; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49Gxdp596Lz9sPF for ; Wed, 6 May 2020 10:03:58 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729586AbgEFADb (ORCPT ); Tue, 5 May 2020 20:03:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728642AbgEFADb (ORCPT ); Tue, 5 May 2020 20:03:31 -0400 Received: from mail-pj1-x1042.google.com (mail-pj1-x1042.google.com [IPv6:2607:f8b0:4864:20::1042]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 009DDC061A0F for ; Tue, 5 May 2020 17:03:30 -0700 (PDT) Received: by mail-pj1-x1042.google.com with SMTP id y6so66390pjc.4 for ; Tue, 05 May 2020 17:03:30 -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=SY2GAQqHGkz9RAl9gNIFBRNG11K3sW0oLG5aIAWsf50SK19wzczLHp9oBZw1PtJZ92 1L8LB4qHin86S4xINEWcAGzhXV94jkReFz/nVhNYRP92dWaSHOuJ8RMop3wEgp7rqRew XGCgZz0Q2xcQhQCplFBiD/oQB39RvCXoWfOiDQAZdBuIr3Ufu1wm3LZ3+v1KLoQWjqZn E6jD5c7DT8UI0xVWCSqgMwtyE16RtcPGNHoUAPEXFy+hVXPNpGqgVssyUDxUwiWkRl7S A+JROzpV0GYLiXY23SDIaWT5hHPN1ZM74NHeOB1rpInx0qTf/JpTT9D6BSuim/1g6Pp0 nclA== X-Gm-Message-State: AGi0PuZ2n0/f4ecjl8wEFlHN4uDUgFADNZNJeXxKctp5gCy3QImH6et2 q5d1V8efAn/KqFlFGPhnRchgOQ== 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 Cc: Luke Nelson , Xi Wang , =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , 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: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@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 Reviewed-by: Björn Töpel Acked-by: Björn Töpel