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=-5.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,T_DKIMWL_WL_HIGH, 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 9C760C004C9 for ; Tue, 7 May 2019 06:33:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 69A822087F for ; Tue, 7 May 2019 06:33:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557210828; bh=oBFyk7fpihJdB0jCxegQVyX+6vGmLC1DK9IvU35itFk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=lwYM+P9akMogvMUugJtN4azNpnTPOS9BfFrE4z1JPxL8ED+JSYFJ8quc0a2Ae1A7X JjwCUl4z+nKvioY96e8Zl0MlPXOdy6jG8EFcwjfEvmHYJ8AI5HdvIebf+gR6K3J++G GBw6sIetOv04Qhgjjz1nAFwBiKCvPEkbSLYNH2X4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726559AbfEGGdn (ORCPT ); Tue, 7 May 2019 02:33:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:57196 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726349AbfEGGdn (ORCPT ); Tue, 7 May 2019 02:33:43 -0400 Received: from localhost (unknown [37.142.3.125]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D6C092087F; Tue, 7 May 2019 06:33:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557210822; bh=oBFyk7fpihJdB0jCxegQVyX+6vGmLC1DK9IvU35itFk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=RyPsl6lmqvcCnKl41VkY/GHW2+ETy7nDPo8Tpqc6bp7gDCBLdqWePFxG5B2Wa9vwT R3/WlBSqCc8Bj3KtWz9uGTPPZS6ordaRPlQ/fveMibMSWfgfc4tq1AglaAlmwW4kMa oMxOIvxG2cStHRR+RV/gLi/uVrPbQ27CrKcpR2aA= Date: Tue, 7 May 2019 09:33:37 +0300 From: Leon Romanovsky To: Jason Gunthorpe Cc: Andrey Konovalov , 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, Catalin Marinas , 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 , Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy Subject: Re: [PATCH v15 13/17] IB, arm64: untag user pointers in ib_uverbs_(re)reg_mr() Message-ID: <20190507063337.GP6938@mtr-leonro.mtl.com> References: <66d044ab9445dcf36a96205a109458ac23f38b73.1557160186.git.andreyknvl@google.com> <20190506195020.GD6201@ziepe.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190506195020.GD6201@ziepe.ca> User-Agent: Mutt/1.11.4 (2019-03-13) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org On Mon, May 06, 2019 at 04:50:20PM -0300, Jason Gunthorpe wrote: > On Mon, May 06, 2019 at 06:30:59PM +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. > > > > ib_uverbs_(re)reg_mr() use provided user pointers for vma lookups (through > > e.g. mlx4_get_umem_mr()), which can only by done with untagged pointers. > > > > Untag user pointers in these functions. > > > > Signed-off-by: Andrey Konovalov > > --- > > drivers/infiniband/core/uverbs_cmd.c | 4 ++++ > > 1 file changed, 4 insertions(+) > > I think this is OK.. We should really get it tested though.. Leon? It can be done after v5.2-rc1. Thanks > > Jason