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=-10.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 1D31EC2B9F4 for ; Thu, 17 Jun 2021 09:13:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E752D613F2 for ; Thu, 17 Jun 2021 09:13:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231480AbhFQJP6 (ORCPT ); Thu, 17 Jun 2021 05:15:58 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:1789 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231390AbhFQJP5 (ORCPT ); Thu, 17 Jun 2021 05:15:57 -0400 Received: from localhost (mailhub3.si.c-s.fr [192.168.12.233]) by localhost (Postfix) with ESMTP id 4G5GZN2HqvzB1V5; Thu, 17 Jun 2021 11:13:48 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id fPAq3z6Fi_8g; Thu, 17 Jun 2021 11:13:48 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 4G5GZN1H1qz9ss4; Thu, 17 Jun 2021 11:13:48 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id F3BB78B807; Thu, 17 Jun 2021 11:13:47 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id w7U1uPE8ElHy; Thu, 17 Jun 2021 11:13:47 +0200 (CEST) Received: from [192.168.4.90] (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 014858B804; Thu, 17 Jun 2021 11:13:46 +0200 (CEST) Subject: Re: [PATCH v3 00/23] Add generic vdso_base tracking To: Dmitry Safonov , linux-kernel@vger.kernel.org Cc: Dmitry Safonov <0x7f454c46@gmail.com>, Alexander Viro , Andrew Morton , Andy Lutomirski , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Guo Ren , "H. Peter Anvin" , Ingo Molnar , Oleg Nesterov , Russell King , Thomas Bogendoerfer , Thomas Gleixner , Vincenzo Frascino , Will Deacon , x86@kernel.org References: <20210611180242.711399-1-dima@arista.com> From: Christophe Leroy Message-ID: Date: Thu, 17 Jun 2021 11:13:44 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210611180242.711399-1-dima@arista.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: fr Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Le 11/06/2021 à 20:02, Dmitry Safonov a écrit : > v3 Changes: > - Migrated arch/powerpc to vdso_base > - Added x86/selftest for unmapped vdso & no landing on fast syscall > - Review comments from Andy & Christophe (thanks!) > - Amended s/born process/execed process/ everywhere I noticed > - Build robot warning on cast from __user pointer > > I've tested it on x86, I would appreciate any help with > Tested-by on arm/arm64/mips/powerpc/s390/... platforms. I tried it on powerpc, normal use still works. What tests can be done exactly ? We have a selftest in powerpc (https://github.com/linuxppc/linux/blob/master/tools/testing/selftests/powerpc/signal/sigreturn_vdso.c) but it doesn't work anymore since the split of VDSO into VDSO+VVAR. Christophe