From patchwork Tue Apr 30 13:25:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10923557 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6A5E614DB for ; Tue, 30 Apr 2019 13:26:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5ADC227EE2 for ; Tue, 30 Apr 2019 13:26:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4DB2628A63; Tue, 30 Apr 2019 13:26:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E40C927EE2 for ; Tue, 30 Apr 2019 13:26:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728635AbfD3N0A (ORCPT ); Tue, 30 Apr 2019 09:26:00 -0400 Received: from mail-qk1-f201.google.com ([209.85.222.201]:36920 "EHLO mail-qk1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728605AbfD3NZ7 (ORCPT ); Tue, 30 Apr 2019 09:25:59 -0400 Received: by mail-qk1-f201.google.com with SMTP id c2so11810930qkm.4 for ; Tue, 30 Apr 2019 06:25:58 -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=5l0a3uzMK38mxhU43HR3pLkdTsHYkFU/5p0+WtYx5vA=; b=g9CCdO8J183ztwieMKtxq5bQgdPwn8MyKUl5zlyySPt09tOB1Gypd0bdF1FTgPWg9U vgl3VSH+QbfWqwQxuQNAq18fHGv2grDucix13/YUy3bvOI1BB9BrzAgOyNFI+ychptbo BVp24qrS90whe3PqSvAaQ8Kncxvv8pqzjLbVvi9smoyLBamx2Dg/fg59oj/C1VgTZmLk po6sIoVdSb935f+/5YJnlpWSaOQYjK3//t7Ql3k3IgbH35nE1TWkeZ08/rMUWbwR2R7Q rNZsAyxKMZqUS4nVVdVnnh9Mowjk/e6QvbUTkAZYjeM7AIkIVd6G6w9+5n4IsjstGWE8 jwFg== 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=5l0a3uzMK38mxhU43HR3pLkdTsHYkFU/5p0+WtYx5vA=; b=KLMJZamzYAcDhZWFHGydxL8X+sVF6/rGItq+sYHKLvJVQFP28evheDrGEXW+e0hd1b svtvD/6iDshQTYF4dqPGHmsPeEK+vXwEt0nyIDvpzNanO0pey8nHW21cS1n2hbtAoxlC Sxjv1q4dh+bDWKcyfiwssJtGFs4mP3Kelw0AMQX7wnAjJoCD/cszfjEtx3vZtp/T0j6r m+KGHRF9LOVraBJcqkuSLD8ZQP4N7y0C7W7FZhD/ATZgKY2XZeQiAb/xWrEtUQ3jJ6hF ajEI9IJIIuCwaGWv8NkHNm2hwKh0fbf9/meHJKkj4r5M6X8bUsZYysIq+JaVoFnvBqQq /xjQ== X-Gm-Message-State: APjAAAWaQqB5DMs+d9Z0KTNq/qF3MIgXBbMDj4jIHSObnjK1Z7o1BJlQ GcLrkOWRKz9Nvn3OhGVQSrN3g8zremDLhDuA X-Google-Smtp-Source: APXvYqzcKJMSJm3saTG/Jy9RV9wnqiRL/1GQ7HSUwiNcvOVWaTtiFz1xHas1LLHxgSsag1rnBPh3sxDf1Qf0ekUW X-Received: by 2002:a05:6214:18d:: with SMTP id q13mr1705396qvr.213.1556630757432; Tue, 30 Apr 2019 06:25:57 -0700 (PDT) Date: Tue, 30 Apr 2019 15:25:09 +0200 In-Reply-To: Message-Id: <05c0c078b8b5984af4cc3b105a58c711dcd83342.1556630205.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.593.g511ec345e18-goog Subject: [PATCH v14 13/17] IB/mlx4, arm64: untag user pointers in mlx4_get_umem_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 , Kuehling@google.com, Felix , Deucher@google.com, Alexander , Koenig@google.com, Christian , 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 , Chintan Pandya , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov , Leon Romanovsky Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 Reviewed-by: Leon Romanovsky --- 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 {