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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_MUTT autolearn=unavailable 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 1A86EC31E48 for ; Wed, 12 Jun 2019 10:39:22 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id DED1C20874 for ; Wed, 12 Jun 2019 10:39:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DED1C20874 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 89FFB6B0003; Wed, 12 Jun 2019 06:39:21 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8766B6B0005; Wed, 12 Jun 2019 06:39:21 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 765E06B0006; Wed, 12 Jun 2019 06:39:21 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-ed1-f71.google.com (mail-ed1-f71.google.com [209.85.208.71]) by kanga.kvack.org (Postfix) with ESMTP id 26C2A6B0003 for ; Wed, 12 Jun 2019 06:39:21 -0400 (EDT) Received: by mail-ed1-f71.google.com with SMTP id l53so25257274edc.7 for ; Wed, 12 Jun 2019 03:39:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:date:from:to :cc:subject:message-id:references:mime-version:content-disposition :in-reply-to:user-agent; bh=X8fz9jLbHBDr51Zrby/4VNbgXtXoE1deh93Qry4o0Aw=; b=cEAN4cwrK1A8Iwv7CjBTzrY1MLpSo0wBs9thSztmkwr4iZfpZvVgn9cxPLhbsi+Luq fAMtWC8tTjQjW6smc3Huqq+L9bCe92ozyS1jdlgMYugrCvqR0LXpRNXzibsm+BnWfZn8 B7L3Sk7xUjXkTRm54MhsBXGNqOZtm6wrGHKP/pyYFtcXOCArQPDkVVCDY08224FbPq4I Q/tYXj0lySNeu/rSObT7uB+SZvxoy5xLwQZ20oCyK80oaMId1qXp39vvOKefWYuaj+9h mclvaPTHgq94p3oxHHBfyWhGuXmr9rqM1c+aK8v24opI1sRRSjk3wAIbxY7gVfViJ6Hc iXrw== X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of catalin.marinas@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=catalin.marinas@arm.com X-Gm-Message-State: APjAAAVM+gnTZ4/7gxVX+EeDwhMbzbXt1/dTSWouDx5dJjUpJTnPYes4 Rsd7jC1voZl/BLkHaRrsdeS+q+FZw+W9sqtFkLDqk8zV2/BeGnjeXZjlts37a6+TeIReODj6qNI Lnz1Ur7unYaGG6C+Ji0gi9H6N8VuaGFK18VVd3sHqpI0B34LPPhpXyhbywuKQrbnS3w== X-Received: by 2002:aa7:dd92:: with SMTP id g18mr32394516edv.194.1560335960751; Wed, 12 Jun 2019 03:39:20 -0700 (PDT) X-Google-Smtp-Source: APXvYqzF8PA/C8Ro7bv9/myv8IJ27fgDeQSLjF4MMR/Tf7TLTkeWTIPoOyMz7axekM4cG38nFYmE X-Received: by 2002:aa7:dd92:: with SMTP id g18mr32394464edv.194.1560335960144; Wed, 12 Jun 2019 03:39:20 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1560335960; cv=none; d=google.com; s=arc-20160816; b=v8QvuYM1rk1WdpfP7wLlvrQFTsF1PkvuB2a4WrRK9TPsR8yQDuQZhwI9SxCFSUqH/f 6QjOVTjyLU2QtV6JebU26x/fGDAqiaXYqrH/D1TgyjvURc53F/IzLhFmJHuTeX5zRZ3R YpDA5k/IN/AnIpFeB7hecADQKBACq46Gf2nRm9SAl+/Ib1QhAQ+88EAnHfeRgzOxn7gN lHwAyCoXS8W7xYzVifUnQOB8csiyyVpQMAVGlDJS/16GgHF9sCcdYPgOyK2/S2vgTJ8a 1heqMvUmttSes3ObSOLECkICjOfKnd4LRQB/k3u7Xpvf4Jrxz4MDrnS+TnAZqZCQv9Az snxQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:cc:to:from:date; bh=X8fz9jLbHBDr51Zrby/4VNbgXtXoE1deh93Qry4o0Aw=; b=cn1MLZbgusZfrJyZhPzsLtwqjczM8+qn/aMcdY4uzTmNTLGHxyN6JR0bIq10AMcnhs +Any05G3jONIMgqzupPERmE+0b87c7kPrPKxCn8ttCpLymFS/jF4NlpAI5kMsBzB7qOc VRvxFvYaBTL0SXNUUUzNISt4MFW3zA0iZgCd9RIGNo9/zPrp+ScgTNu+Boq0K7ERhkAy uLt3/2SfNl16W0rBp0lIqh1RT9MyX/GmaNPBtCk051wnxsufzwj5pGIDiH+6aW5NYvAS kDhTvjn1EEcl1R67xbYN06jetPJ77em2m4xy6Qin8V0T8gHUbgT+w1bH0cdCb9AwIYjD 7/LA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of catalin.marinas@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=catalin.marinas@arm.com Received: from foss.arm.com (foss.arm.com. [217.140.110.172]) by mx.google.com with ESMTP id ec4si1901328ejb.68.2019.06.12.03.39.19 for ; Wed, 12 Jun 2019 03:39:20 -0700 (PDT) Received-SPF: pass (google.com: domain of catalin.marinas@arm.com designates 217.140.110.172 as permitted sender) client-ip=217.140.110.172; Authentication-Results: mx.google.com; spf=pass (google.com: domain of catalin.marinas@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=catalin.marinas@arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 29FDA28; Wed, 12 Jun 2019 03:39:19 -0700 (PDT) Received: from C02TF0J2HF1T.local (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0039F3F246; Wed, 12 Jun 2019 03:40:38 -0700 (PDT) Date: Wed, 12 Jun 2019 11:38:49 +0100 From: Catalin Marinas To: Andrey Konovalov Cc: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, Vincenzo Frascino , Will Deacon , Mark Rutland , Andrew Morton , Greg Kroah-Hartman , Kees Cook , Yishai Hadas , Felix Kuehling , Alexander Deucher , Christian Koenig , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , Leon Romanovsky , Luc Van Oostenryck , Dave Martin , Khalid Aziz , enh , Jason Gunthorpe , Christoph Hellwig , Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , Kevin Brodsky , Szabolcs Nagy Subject: Re: [PATCH v16 15/16] vfio/type1, arm64: untag user pointers in vaddr_get_pfn Message-ID: <20190612103848.GA28951@C02TF0J2HF1T.local> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.11.2 (2019-01-07) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, Jun 03, 2019 at 06:55:17PM +0200, Andrey Konovalov wrote: > This patch is a part of a series that extends arm64 kernel ABI to allow to > pass tagged user pointers (with the top byte set to something else other > than 0x00) as syscall arguments. > > vaddr_get_pfn() uses provided user pointers for vma lookups, which can > only by done with untagged pointers. > > Untag user pointers in this function. > > Signed-off-by: Andrey Konovalov Reviewed-by: Catalin Marinas