From patchwork Wed Apr 10 19:50:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiong Wang X-Patchwork-Id: 1083582 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Original-To: incoming-bpf@patchwork.ozlabs.org Delivered-To: patchwork-incoming-bpf@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=bpf-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=netronome.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=netronome-com.20150623.gappssmtp.com header.i=@netronome-com.20150623.gappssmtp.com header.b="CauEe20b"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44fZXd5L9Sz9s5c for ; Thu, 11 Apr 2019 05:51:13 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726856AbfDJTvN (ORCPT ); Wed, 10 Apr 2019 15:51:13 -0400 Received: from mail-wr1-f68.google.com ([209.85.221.68]:37156 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726784AbfDJTu6 (ORCPT ); Wed, 10 Apr 2019 15:50:58 -0400 Received: by mail-wr1-f68.google.com with SMTP id w10so4369104wrm.4 for ; Wed, 10 Apr 2019 12:50:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=netronome-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=/wylRhv97waN1hLNQRjtw5HFd7aLKXwfbfkeZTfcGns=; b=CauEe20bVPVPu+dhpUHLI0ywZsDC1Ms1bKy0bR2cIZpEtQjjscwA9urHJkNu57aJV+ 3we51tgocA2matiPupOzyt9K1J1YoycRqSSS3vA1nOsftesGBnKeEavX1MGosJvXLeXU oAW9tTd1iEvWpZO1Y1hJx8PO5a1J2x/g9TdpTQ9PTbdohZofPnpbmLODhQrOQFCEAFmK qT7o8eWYf3BXgSb1vccPkacDnmJju+pzcqFaULdLMS+2A1LMrGJAUBDGNbSIbgiqGobS ETS6nwOGj2AhVQaOi/BunTPuXiCkeHgW2JfApF373nhD+pkwuTKskQdXi+bnPHG29By7 61iw== 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:in-reply-to :references; bh=/wylRhv97waN1hLNQRjtw5HFd7aLKXwfbfkeZTfcGns=; b=QjDhVsJzyNlsg5nBLzidKZoONWF5YU2+S/vfsUt/t/Yng5K+OYjWAj1N1bXSOCU8Nr FEKiu+nMHiBB8FUytG6ypva06Icl7ZGBL6JvQk5onLupflAJdxngyBLTBvpHY91gBdZf HqDiPjBk6zvAF9McCTBH7YK23JFdLFJBOdUrsKZDTBqaLgEaOvsp46I70X2c4LO1O5dL 5ZV0nfl90uWXaqz0jwIzqigYT3mueI47Ico4wR9dTnVTiPRyd6G2s+uymWXWfilLJ3AY z67ug5ZMjVnI/XNG1aYYTTqn7aHOoiLnrlfJzHdjlfBsBa+jXjsqp/30Ho86StIz82l9 JWYQ== X-Gm-Message-State: APjAAAVyIqXXCaQlTA58Jbubb2g+yVcu9Yo5X3t54YByVYmdyKGHrApK pK5mBpI9fLY6MA7DtLxmLuaJBw== X-Google-Smtp-Source: APXvYqzJyHpIKxagu00hYmm6kuJ65OpcVvnScKF15xs1KyaLICKK9F+zdy0J9U1OJIr1KAEqw5QEig== X-Received: by 2002:adf:82c9:: with SMTP id 67mr6586210wrc.261.1554925856263; Wed, 10 Apr 2019 12:50:56 -0700 (PDT) Received: from cbtest28.netronome.com ([217.38.71.146]) by smtp.gmail.com with ESMTPSA id 4sm2288540wmg.12.2019.04.10.12.50.55 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 10 Apr 2019 12:50:55 -0700 (PDT) From: Jiong Wang To: alexei.starovoitov@gmail.com, daniel@iogearbox.net Cc: bpf@vger.kernel.org, netdev@vger.kernel.org, oss-drivers@netronome.com, Jiong Wang , Martin Schwidefsky , Heiko Carstens Subject: [PATCH/RFC v2 bpf-next 15/19] s390: bpf: eliminate zero extension code-gen Date: Wed, 10 Apr 2019 20:50:29 +0100 Message-Id: <1554925833-7333-16-git-send-email-jiong.wang@netronome.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1554925833-7333-1-git-send-email-jiong.wang@netronome.com> References: <1554925833-7333-1-git-send-email-jiong.wang@netronome.com> Sender: bpf-owner@vger.kernel.org Precedence: bulk List-Id: netdev.vger.kernel.org Cc: Martin Schwidefsky Cc: Heiko Carstens Signed-off-by: Jiong Wang --- arch/s390/net/bpf_jit_comp.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c index 51dd026..59592d7 100644 --- a/arch/s390/net/bpf_jit_comp.c +++ b/arch/s390/net/bpf_jit_comp.c @@ -299,9 +299,11 @@ static inline void reg_set_seen(struct bpf_jit *jit, u32 b1) #define EMIT_ZERO(b1) \ ({ \ - /* llgfr %dst,%dst (zero extend to 64 bit) */ \ - EMIT4(0xb9160000, b1, b1); \ - REG_SET_SEEN(b1); \ + if (fp->aux->no_verifier_zext) { \ + /* llgfr %dst,%dst (zero extend to 64 bit) */ \ + EMIT4(0xb9160000, b1, b1); \ + REG_SET_SEEN(b1); \ + } \ }) /* @@ -1282,6 +1284,11 @@ static int bpf_jit_prog(struct bpf_jit *jit, struct bpf_prog *fp) return 0; } +bool bpf_jit_hardware_zext(void) +{ + return false; +} + /* * Compile eBPF program "fp" */