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=-16.5 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,T_DKIMWL_WL_MED,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 929EEC04AAB for ; Mon, 6 May 2019 16:31:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 65BEC21019 for ; Mon, 6 May 2019 16:31:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="hn4rH9KT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727315AbfEFQbu (ORCPT ); Mon, 6 May 2019 12:31:50 -0400 Received: from mail-ot1-f74.google.com ([209.85.210.74]:33246 "EHLO mail-ot1-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727263AbfEFQbs (ORCPT ); Mon, 6 May 2019 12:31:48 -0400 Received: by mail-ot1-f74.google.com with SMTP id 18so4466889otu.0 for ; Mon, 06 May 2019 09:31:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=BvoYtYVsULamnYvbwO19c3h5oHA1gsMsAv5tZYbLYtI=; b=hn4rH9KTek8R37jjBWMcf/SnTi9wO6imyjbK43Qo3YFFy0w0QB9ppRC7K8TE7v3vlN nPLbzWoXhcOl9RZZTW0CT+GOCLOJRZHlTgH0IFE90/0mo3gA6Benvmv0xM9qlEM2L7iM a5/5EdryhXK5o1zmP38+JskPbuvRNi2KBDqgGoYwdgZckW/t0t3zXYlgA28tCgQWx38p zeMjQt/2TKtd8YWaOZqpDqkiV1tfPRGdf11R4Vmzgti01WpJ/ug4M22kRPfo4KNLvnrQ G8KQ2Dx3TZLoioP3vZYIMjrpzIYzmaefwwMqniR4qNzu+AscTWd9F/aHBCgCKh66bnIf LcNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=BvoYtYVsULamnYvbwO19c3h5oHA1gsMsAv5tZYbLYtI=; b=QNvh96HJ0EJkuV2hiaLnxspUsNNnB2b/vPRU6jCX1aWmvqqRUEiZTMQ/FSPCOB6Osy cxuWF52BVL7xO4KRYR7Wg9ScqLsLTlVEZXtyqz6bpG26W2mGARRq6kQAQGEfZeB6KqPX nD2l9809N9cCX+H+56mhp3nx5wKBAzuESaHgnpj3vuWTwRr4I+7dTpU3ukOXXnbTnSUg axuxUhxZCE2Xo3iQ+GaafX52QJXy8JTPftIRFNTlOLWwF7WoYph7eaVbJ/+WhmhfiMkP HRa8wRz59mVpesvs399iqyKwaPc7V+g1whCxpeX7AfYNyC6lU4rB2S8uMpbWN3Zg2vp8 KKGA== X-Gm-Message-State: APjAAAXwhihLNOo6+f0XBmNpHknFMOv9fJwuWZxyEE2hwHqgoyQJ0PAi /V6WYlsD542pHO9NZl/NdvCxmt1lzNulsmuY X-Google-Smtp-Source: APXvYqy3zk1gAf1HD3ERPdP+fu/IbJWPYjnwXEpH7KM/4Kolrw9tSDmooPMwqXT4nvIVhZWlBkow5/TqTCzeTPOv X-Received: by 2002:a9d:6008:: with SMTP id h8mr18251374otj.55.1557160307352; Mon, 06 May 2019 09:31:47 -0700 (PDT) Date: Mon, 6 May 2019 18:30:59 +0200 In-Reply-To: Message-Id: <66d044ab9445dcf36a96205a109458ac23f38b73.1557160186.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog Subject: [PATCH v15 13/17] IB, arm64: untag user pointers in ib_uverbs_(re)reg_mr() From: Andrey Konovalov To: 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 Cc: 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 , Leon Romanovsky , 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 , Andrey Konovalov Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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(+) diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 062a86c04123..36e7b52577d0 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -708,6 +708,8 @@ static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) if (ret) return ret; + cmd.start = untagged_addr(cmd.start); + if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) return -EINVAL; @@ -790,6 +792,8 @@ static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) if (ret) return ret; + cmd.start = untagged_addr(cmd.start); + if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags) return -EINVAL; -- 2.21.0.1020.gf2820cf01a-goog