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=-16.6 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 A870DC10F05 for ; Wed, 20 Mar 2019 14:53:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 799BC206BA for ; Wed, 20 Mar 2019 14:53:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="sexMIu8a" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728727AbfCTOxd (ORCPT ); Wed, 20 Mar 2019 10:53:33 -0400 Received: from mail-yw1-f74.google.com ([209.85.161.74]:38312 "EHLO mail-yw1-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728638AbfCTOwh (ORCPT ); Wed, 20 Mar 2019 10:52:37 -0400 Received: by mail-yw1-f74.google.com with SMTP id i203so3416660ywa.5 for ; Wed, 20 Mar 2019 07:52:36 -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=JYfYaqFkvasJC562WHpti4tYqqXwAjMl9KNYEduKdaE=; b=sexMIu8avs3PQT75uBvPTQ7a6BwfzDpDtEim0BHpT2lZIdVCSQQNJCOv1y+KBVjuwz NX0TZsiakkaHgGM438rpKshO2lygtlHGBjF9I7HIZlISq6IjvdJBMN68/khgYyArgEAc 8tbatLWytzPpO7bRWCVSIFqMId8s/P66Z59No3RuANZfIft4UrNO78pUbAaCEl8oBE2Q qNCkyYahb1b1Pv7Y/SBLJD0dj0RxnH2fWpp5qHUGdBZK+/bAoxPvBHDVj/4wKQ82tyl8 DVhiys3Wu1xJZ38zAN40H2K69ZFtxYiDzY02fAJ60bAOEsljjjp1FIjebecLuWwY+E7M Zatw== 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=JYfYaqFkvasJC562WHpti4tYqqXwAjMl9KNYEduKdaE=; b=GuaK9DcY9lWbsnXM+9uGVcH+SZTaxFb/vVYePD4aEP+zRXnyijBQjj9tTW+mKO0hcK sNxqkHE5SpjsZ9Q+BSCmBQ8IZv7QBlM+jLDh6fT1bb+4nu6TCzuhw0TPa9ZFj9D+GitH v+siKqCl1vezy7BtbEbOmk4PzJiiFXZRfiuVoS0IXTKN1FwhPXevyV1i7/VdY9+GzIVn sN/9f6rsdt3Bhk4FGW1yZcjiGVg7FyImVzsANbp18jdA0tg52Fzh6eN9g1CgbkJvKGOr nHK+hyMX+nmFMciWmTirSJlnEC4lhP6kp8yp0BYLVEzNQnF2mqtsGuLz/gYDgQVOCmI8 SGiw== X-Gm-Message-State: APjAAAXa4Hcq3svHANtbI5pnsaxLJJcshYhadtpFg3CbTDzMkc1ut56N 1Qv4b/AI8XFudLXwT+QBg3kQ2JQJ9/IvSdfv X-Google-Smtp-Source: APXvYqz/OFC1PuPZodVHMFKw9kUzVJMyrdAYISJ9xGPWIvonfiJf4upSDw3KUidiP9gNNGgKCiqyzVAdZse9Ion/ X-Received: by 2002:a25:bb8c:: with SMTP id y12mr2095179ybg.89.1553093556448; Wed, 20 Mar 2019 07:52:36 -0700 (PDT) Date: Wed, 20 Mar 2019 15:51:30 +0100 In-Reply-To: Message-Id: <1e2824fd77e8eeb351c6c6246f384d0d89fd2d58.1553093421.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.225.g810b269d1ac-goog Subject: [PATCH v13 16/20] IB/mlx4, arm64: untag user pointers in mlx4_get_umem_mr From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Mark Rutland , Robin Murphy , Kees Cook , Kate Stewart , Greg Kroah-Hartman , Andrew Morton , Ingo Molnar , "Kirill A . Shutemov" , Shuah Khan , Vincenzo Frascino , Eric Dumazet , "David S. Miller" , Alexei Starovoitov , Daniel Borkmann , Steven Rostedt , Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo , Alex Deucher , "=?UTF-8?q?Christian=20K=C3=B6nig?=" , "David (ChunMing) Zhou" , Yishai Hadas , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, bpf@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, linux-kernel@vger.kernel.org Cc: Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Chintan Pandya , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov Content-Type: text/plain; charset="UTF-8" Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@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. mlx4_get_umem_mr() 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 --- drivers/infiniband/hw/mlx4/mr.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c index 395379a480cb..9a35ed2c6a6f 100644 --- a/drivers/infiniband/hw/mlx4/mr.c +++ b/drivers/infiniband/hw/mlx4/mr.c @@ -378,6 +378,7 @@ static struct ib_umem *mlx4_get_umem_mr(struct ib_udata *udata, u64 start, * again */ if (!ib_access_writable(access_flags)) { + unsigned long untagged_start = untagged_addr(start); struct vm_area_struct *vma; down_read(¤t->mm->mmap_sem); @@ -386,9 +387,9 @@ static struct ib_umem *mlx4_get_umem_mr(struct ib_udata *udata, u64 start, * cover the memory, but for now it requires a single vma to * entirely cover the MR to support RO mappings. */ - vma = find_vma(current->mm, start); - if (vma && vma->vm_end >= start + length && - vma->vm_start <= start) { + vma = find_vma(current->mm, untagged_start); + if (vma && vma->vm_end >= untagged_start + length && + vma->vm_start <= untagged_start) { if (vma->vm_flags & VM_WRITE) access_flags |= IB_ACCESS_LOCAL_WRITE; } else { -- 2.21.0.225.g810b269d1ac-goog