From patchwork Tue Mar 26 18:05:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiong Wang X-Patchwork-Id: 1065905 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="C8BAAlG4"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44TJxR6VY6z9sTR for ; Wed, 27 Mar 2019 05:07:07 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732521AbfCZSHH (ORCPT ); Tue, 26 Mar 2019 14:07:07 -0400 Received: from mail-wr1-f68.google.com ([209.85.221.68]:46535 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732325AbfCZSGu (ORCPT ); Tue, 26 Mar 2019 14:06:50 -0400 Received: by mail-wr1-f68.google.com with SMTP id o1so15466691wrs.13 for ; Tue, 26 Mar 2019 11:06:48 -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=C8BAAlG4HEv42kHlnrcjpi2XqGSGKgawPiv1cUHm1oaeWHBrcvSDSc5QF3VEzD4iKN cP/J8O7wQ/m5tSSUxofchGX68sX+EwskQ39M++NtnCD+OKOsHCdOOZ2FRmA9FDtE4Q5O pC3Qib6NFHJ3XfANiFbHqnzsBZU7FtOc31Zp3UI9IYXy74Yic8+kUL+i/LEJtT5ssRGs YVKkGZR5KM/dEkUnMMO5qe+I/7z3gJOZsQUqpdv4fhsAdgft1tuZxPDVMVCa4upDgbzF vlP94ZNYu7JfIvc77VI8sL48ItMwwT1nXkndlA3ifyo9JgqE4aHOliCbVsciPGb5gQJB 5/rg== 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=f++m2iGQyu6iCBpLfBUJY0vnuy85Q5RrAux45hq/xtW7LgyYdEmDC5TucODf5DZAo0 eFBjdel7oG40/r+eU9J7eM/w9uLtpZ6mI9eL034D8FSXS/dtz81aXdeEHxKTWDjK8GUe MYMKFwHgJVw6RmxQe9Bn33p/rtXVILU2dkJyHFpGdxGo0nfZRO4YBKXL2a7dHQShtomI twAdJ+rk6n/pKu3DaqGUAzZgAUSpMs5QrSzbDauDn78rKLIOtL6N3Vs/HUhDi/cZs5LW XjuXEo2GHZIsjcVMnJIan8Y5dMawR63OctS46O8TLoIGKtt0VyodQij3TLquI6guVZ0n 82kQ== X-Gm-Message-State: APjAAAW/PMX829Ahky1FsoT61h0WOFx93LqDWlUqX/55WAok/aL7AYsn Xlp3fV3pZn9ba1v9oyoHB+Fzzw== X-Google-Smtp-Source: APXvYqwbtrejR3KCst2sQRjESvX6YZZCTbRkCOolq/qhQ3zuJEC1s5hVXN92fwZnDA7m3oOf0RSnEw== X-Received: by 2002:adf:f286:: with SMTP id k6mr11712543wro.137.1553623608337; Tue, 26 Mar 2019 11:06:48 -0700 (PDT) Received: from cbtest28.netronome.com ([217.38.71.146]) by smtp.gmail.com with ESMTPSA id i28sm36697534wrc.32.2019.03.26.11.06.46 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 26 Mar 2019 11:06:46 -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 bpf-next 10/16] s390: bpf: eliminate zero extension code-gen Date: Tue, 26 Mar 2019 18:05:33 +0000 Message-Id: <1553623539-15474-11-git-send-email-jiong.wang@netronome.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1553623539-15474-1-git-send-email-jiong.wang@netronome.com> References: <1553623539-15474-1-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" */