From patchwork Wed Mar 20 14:51:28 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10861925 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 0FBD617E9 for ; Wed, 20 Mar 2019 14:52:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EEAF029A0A for ; Wed, 20 Mar 2019 14:52:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EAD7C29D12; Wed, 20 Mar 2019 14:52:34 +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 7DBC029D9E for ; Wed, 20 Mar 2019 14:52:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728623AbfCTOwd (ORCPT ); Wed, 20 Mar 2019 10:52:33 -0400 Received: from mail-vs1-f74.google.com ([209.85.217.74]:55932 "EHLO mail-vs1-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728614AbfCTOwb (ORCPT ); Wed, 20 Mar 2019 10:52:31 -0400 Received: by mail-vs1-f74.google.com with SMTP id p2so845493vsc.22 for ; Wed, 20 Mar 2019 07:52:30 -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=m8A/eWnO1t/szRUY+Sf0prGvVhEq1OhdUwg16kciR9Y=; b=cS/GWV3n1i5lKwRxDER3D1j30wbKLrIjlKCprX6vTMe8cTVCKT78AfLte355OG84/3 9+SHdUMKMpHe6+iOH3VzHT8pjZaRW6z5pqFcAKCDTvZf0KT3SG8dydvzjoFsqtcRHpO+ s7SFViAVxLm68wpAwuS47+5QK7VNwFMa5b5lxPhRs6N/VfdBIHBgFKkHSvd9I7PtKYIh RebKnvIoWsQx14IlpHTag2G1jk9EWaN7+3KeAj9wdOKQHYUJVkQSYeiCwVLs53b9gTS2 jR0wtaevF8SL4RJoxbCrc5cwPvE9OCqov4p9AQcvaLAPdf8xImWPv+ch+hRrKoxeSje1 7BOw== 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=m8A/eWnO1t/szRUY+Sf0prGvVhEq1OhdUwg16kciR9Y=; b=nw1q5XMcFOFi5Qxo+KjarX3ocOWkvFscFidvn4Qj/gD9pNnKrAKyu2on3KNOGZSah7 r+FbfvgveksboWydgvve9t9lKD1k1OvRkBTXBmyq2ur6D5g6saTwIsJfunz/CgH6ygfI t9uz5mtd/oFqs8hsNQs8qW+IIVND7cy5MwGx3qK0+YVKtI0OunTDMp0TEF3/BFeQYRPp XslL5Ji7FG7AsPUsV63/y4vXTjuwMhMeDl/kPhSc5Wf9rNHW8GXZV+aof5gU0/lv+6hu j+MLRdZmnIekqBXUq2LMNxK6GFepnWKEnnZutIRuVARuRugfKmPZxn9WVTxE3e1RzPzq llmQ== X-Gm-Message-State: APjAAAVAt1VC5BLyos5iTntpvnLRwcgAVTPlfL7GQStFbmYCUFsOsQu2 D9l497MrBAWpcuVLcgJDJE9l5RetXnWQKhhk X-Google-Smtp-Source: APXvYqw58aZo87dG3fwjMiai1M3z5FY5q/6ly8PoJSCWFGZ15x+DIhLzfcwRQ16QrQdSY5QNXUz25VoApSfh8lGu X-Received: by 2002:a1f:c507:: with SMTP id v7mr16491398vkf.18.1553093549995; Wed, 20 Mar 2019 07:52:29 -0700 (PDT) Date: Wed, 20 Mar 2019 15:51:28 +0100 In-Reply-To: Message-Id: <017804b2198a906463d634f84777b6087c9b4a40.1553093421.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.225.g810b269d1ac-goog Subject: [PATCH v13 14/20] drm/amdgpu, arm64: untag user pointers in amdgpu_ttm_tt_get_user_pages 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_K=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 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@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. amdgpu_ttm_tt_get_user_pages() 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/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 73e71e61dc99..891b027fa33b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -751,10 +751,11 @@ int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages) * check that we only use anonymous memory to prevent problems * with writeback */ - unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE; + unsigned long userptr = untagged_addr(gtt->userptr); + unsigned long end = userptr + ttm->num_pages * PAGE_SIZE; struct vm_area_struct *vma; - vma = find_vma(mm, gtt->userptr); + vma = find_vma(mm, userptr); if (!vma || vma->vm_file || vma->vm_end < end) { up_read(&mm->mmap_sem); return -EPERM;