From patchwork Mon Apr 15 17:26:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiong Wang X-Patchwork-Id: 1085813 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="1rFRMcPM"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44jb5k54dkz9s9N for ; Tue, 16 Apr 2019 03:26:50 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727997AbfDOR0u (ORCPT ); Mon, 15 Apr 2019 13:26:50 -0400 Received: from mail-wm1-f67.google.com ([209.85.128.67]:53102 "EHLO mail-wm1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727996AbfDOR0t (ORCPT ); Mon, 15 Apr 2019 13:26:49 -0400 Received: by mail-wm1-f67.google.com with SMTP id a184so21665319wma.2 for ; Mon, 15 Apr 2019 10:26:49 -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=1rFRMcPMkLXAdQWYIG4OQZyv5lTUdPNUUFk+bSUMS0PNHIbjIfudJ2LMnAeYwuQviZ 0UpeZrJ4nUZMbE/uPJtvdFdhJvzfkbh4Gw9qokrUlIuvuZfFppeBve/JcALp7IBPWaXd gTlEdNyxIJy61JkUzB23LgZccjW/sgNJrj+Bc0qEaDnVOkPFOx637B8iP0SfVKAVfRPK mWMfvRiGI3VlEdwUpv9xZZ99bz7HL6Gp/c1grwZlwG57cjyHFkilevY0cF35l0LAWf+L ETtXAuqNy8uDJo+NiJXrIr10Or3vN6G/NsqnFY0JWEHV/5ngKFZbYfCcj6QvgSWqGXMu dpEA== 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=fq9bkBe1l5DiNWctidCiXecaTweRf4L7K9ZSiVnfNwKH19CESx3KcUXuBlwYlCl2SQ n+zrFsVkbCuF5EwL7wc/fHvoxR4khRZs801kLmYo6Fz+pLJqtjgxgESRzAc1yE54GLYm tNgh3e0IBaB81BL+TGnTM5deaNGt8jyc7FDxklhiQzUusEzo2tXrHWpIcLjtuayygGrI cLaDRoyQ8JVRxBStb3A9CrHfHxoXhyusOkK7/6PYS/7wy5ImQGgfHbbVLf0iTe/yDgq0 th1N9GVQQa0HuaHBkn9lHAlC3aW5K8QW+ormm5taRbavbjLUinoKJXJxlk/IaMmdg9ks 32pA== X-Gm-Message-State: APjAAAW1F1ikIjGsQ7ToPdXibOphHU0WVvGW2fJJHhHcYZE3/mEZBNIH 49z0SeIJZcJ/Y5fcABjSq+iOBg== X-Google-Smtp-Source: APXvYqz/QT58iBJa8jehbPPJU47dajP4i3GDxrmy5OLV/3ph0RCMz9QjhWw7jm9L3rgJlXvgtekYnA== X-Received: by 2002:a1c:7e8a:: with SMTP id z132mr24087701wmc.92.1555349208789; Mon, 15 Apr 2019 10:26:48 -0700 (PDT) Received: from cbtest28.netronome.com ([217.38.71.146]) by smtp.gmail.com with ESMTPSA id v190sm27094232wme.18.2019.04.15.10.26.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 15 Apr 2019 10:26:48 -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 v4 bpf-next 11/15] s390: bpf: eliminate zero extension code-gen Date: Mon, 15 Apr 2019 18:26:21 +0100 Message-Id: <1555349185-12508-12-git-send-email-jiong.wang@netronome.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1555349185-12508-1-git-send-email-jiong.wang@netronome.com> References: <1555349185-12508-1-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" */