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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 0F752C10F11 for ; Wed, 24 Apr 2019 15:26:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CE38B218FE for ; Wed, 24 Apr 2019 15:26:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=efficios.com header.i=@efficios.com header.b="tmS/Zbxu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731466AbfDXP0L (ORCPT ); Wed, 24 Apr 2019 11:26:11 -0400 Received: from mail.efficios.com ([167.114.142.138]:58022 "EHLO mail.efficios.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731224AbfDXPZn (ORCPT ); Wed, 24 Apr 2019 11:25:43 -0400 Received: from localhost (ip6-localhost [IPv6:::1]) by mail.efficios.com (Postfix) with ESMTP id 5393A1D91F4; Wed, 24 Apr 2019 11:25:42 -0400 (EDT) Received: from mail.efficios.com ([IPv6:::1]) by localhost (mail02.efficios.com [IPv6:::1]) (amavisd-new, port 10032) with ESMTP id B8pzYMaloWiC; Wed, 24 Apr 2019 11:25:41 -0400 (EDT) Received: from localhost (ip6-localhost [IPv6:::1]) by mail.efficios.com (Postfix) with ESMTP id AB1DB1D91E6; Wed, 24 Apr 2019 11:25:41 -0400 (EDT) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.efficios.com AB1DB1D91E6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=efficios.com; s=default; t=1556119541; bh=wPddiBdShBppXNiDLwqz7lNkyC8NrgYYgntI0yfX9Z0=; h=From:To:Date:Message-Id; b=tmS/ZbxuL7ei/mhwDZhmwkI4wjM5IqnIQELAJFcGBGCJvIsB2ZUGG0HGBc4MUFTgp /C5XP2TGYWgsxLiidsEDrSec8gaN3sE1VQtmYHOhBL5Ifj9amUtQPLyXhHG/YEgsnP VSIcMSwuJuR0a9baitflWCWM9J8+6vNYnWBum3NJCxeTF2NPA7kZTGdQIiIZ899Y7X jjGyTQFPuajZpdFsaf13sh61IEPKyS92ytvIMJDVK6m0yuq8FiUhXJotWjuzsjmEBi 7aKEZVKcxvp9GDxK20eFlxf0ZgJPAKuUxP7MMSTigq+Pq3e1c8LCNzquEKlkKYHIF4 mOHsQmfOmz91w== X-Virus-Scanned: amavisd-new at efficios.com Received: from mail.efficios.com ([IPv6:::1]) by localhost (mail02.efficios.com [IPv6:::1]) (amavisd-new, port 10026) with ESMTP id XgDReCUcN929; Wed, 24 Apr 2019 11:25:41 -0400 (EDT) Received: from thinkos.internal.efficios.com (192-222-157-41.qc.cable.ebox.net [192.222.157.41]) by mail.efficios.com (Postfix) with ESMTPSA id 31B981D91BE; Wed, 24 Apr 2019 11:25:39 -0400 (EDT) From: Mathieu Desnoyers To: Peter Zijlstra , "Paul E . McKenney" , Boqun Feng Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, Thomas Gleixner , Andy Lutomirski , Dave Watson , Paul Turner , Andrew Morton , Russell King , Ingo Molnar , "H . Peter Anvin" , Andi Kleen , Chris Lameter , Ben Maurer , Steven Rostedt , Josh Triplett , Linus Torvalds , Catalin Marinas , Will Deacon , Michael Kerrisk , Joel Fernandes , Shuah Khan , Mathieu Desnoyers , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Alan Modra , linuxppc-dev@lists.ozlabs.org Subject: [RFC PATCH for 5.2 09/10] rseq/selftests: powerpc code signature: generate valid instructions Date: Wed, 24 Apr 2019 11:25:01 -0400 Message-Id: <20190424152502.14246-10-mathieu.desnoyers@efficios.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190424152502.14246-1-mathieu.desnoyers@efficios.com> References: <20190424152502.14246-1-mathieu.desnoyers@efficios.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use "twui" as the guard instruction for the restartable sequence abort handler. Signed-off-by: Mathieu Desnoyers CC: Benjamin Herrenschmidt CC: Paul Mackerras CC: Michael Ellerman CC: Boqun Feng CC: Peter Zijlstra CC: "Paul E. McKenney" CC: Alan Modra CC: linuxppc-dev@lists.ozlabs.org --- tools/testing/selftests/rseq/rseq-ppc.h | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/rseq/rseq-ppc.h b/tools/testing/selftests/rseq/rseq-ppc.h index 9df18487fa9f..76be90196fe4 100644 --- a/tools/testing/selftests/rseq/rseq-ppc.h +++ b/tools/testing/selftests/rseq/rseq-ppc.h @@ -6,7 +6,15 @@ * (C) Copyright 2016-2018 - Boqun Feng */ -#define RSEQ_SIG 0x53053053 +/* + * RSEQ_SIG is used with the following trap instruction: + * + * powerpc-be: 0f e5 00 0b twui r5,11 + * powerpc64-le: 0b 00 e5 0f twui r5,11 + * powerpc64-be: 0f e5 00 0b twui r5,11 + */ + +#define RSEQ_SIG 0x0fe5000b #define rseq_smp_mb() __asm__ __volatile__ ("sync" ::: "memory", "cc") #define rseq_smp_lwsync() __asm__ __volatile__ ("lwsync" ::: "memory", "cc") -- 2.11.0