From patchwork Mon May 6 16:30:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10931495 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 A00DF1575 for ; Mon, 6 May 2019 16:32:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8F514286AA for ; Mon, 6 May 2019 16:32:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 82E5B287EF; Mon, 6 May 2019 16:32:42 +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 2DD0928847 for ; Mon, 6 May 2019 16:32:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726338AbfEFQcf (ORCPT ); Mon, 6 May 2019 12:32:35 -0400 Received: from mail-ot1-f74.google.com ([209.85.210.74]:39790 "EHLO mail-ot1-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727234AbfEFQbp (ORCPT ); Mon, 6 May 2019 12:31:45 -0400 Received: by mail-ot1-f74.google.com with SMTP id g8so7771849otq.6 for ; Mon, 06 May 2019 09:31:44 -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=eYbhxmTmdaiTVlq2aRmj2n9QkL6CX4/S4opJ9oDHFhE=; b=ZSFHbQPvMQhkrf29+rXmES4x80rxWQfO3CRg3EirSkEvMHaN6TChbsHuGqG8tqYPqI EOCA65HA1vwG2VBAq4EN+A4OM16jXXWhM8t5gUCVAGxaFpj7A96cWjckSSXVB9ifgUBP JPRXtbLz3WvjXz6TEKimgkTZH4CSKnvPcLkcG+UwjiKkw5OJqJ0dywa/iWl3MUEMoYLx yX/R0TAlH28V7Dy/lDpZ2CQKiEy+5rLrSQMyM1Z1SBWcw4VX+lOfzjflOLQGIDoNcKIy Lw+nu7cdx5CVE6SIyoKDCFcQFHBzYbom0atBI7FulTuqD2oMzEvZRTJLiB0pdkfBeBX2 irnA== 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=eYbhxmTmdaiTVlq2aRmj2n9QkL6CX4/S4opJ9oDHFhE=; b=M8v/gnDD+A+uVuyhixoKBhF6k4eyBC05omKFe2pGltD3mbLA/b7YFx8q7IsQt+Ask4 sFJnRYc3L5y0A5smMuQ5UxypuPQjuuukOBmQC6E1DScs4APv86uaIX4WWpt8oFxVhWhN N4RLEfq/VPeyjSY5Ydk23imVGeUZqehao4QVECsx9L5z7wW6m/ZhWm9ayuAK/LUAz6tB VLG5LwlMFnZN+YT7l87ZPgJSyTZsToAX8a1MWdfY5/UY1TjMw7ukdeszVPi6NTNhlY9f mg0LLmEy04mssANfAjOnJM7Rg+cm7b+T0Xg3lagZfIDXq5TXQ8g7QAEasVDKW4x3k5n4 aW1A== X-Gm-Message-State: APjAAAXGcPsugRWsHZcXEc7gVQiKbMiF5AxzN5PRBX+0b8iiZsH9ifbN rWv4eVb7gAGevyZ9ZrI4kYsNJOZBNNMh3TDg X-Google-Smtp-Source: APXvYqzdzQlfaHkw0Qwo4QQtxGeWhxSSS13Ps1SOtj6ReWwWjESZwRkhi/LnnldOgTKgizVRLfncWXFiUgbgbiQx X-Received: by 2002:a9d:7d04:: with SMTP id v4mr16958653otn.185.1557160304159; Mon, 06 May 2019 09:31:44 -0700 (PDT) Date: Mon, 6 May 2019 18:30:58 +0200 In-Reply-To: Message-Id: <03fe9d923db75cf72678f3ce103838e67390751a.1557160186.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog Subject: [PATCH v15 12/17] drm/radeon, arm64: untag user pointers in radeon_gem_userptr_ioctl 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 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@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. In radeon_gem_userptr_ioctl() an MMU notifier is set up with a (tagged) userspace pointer. The untagged address should be used so that MMU notifiers for the untagged address get correctly matched up with the right BO. This funcation also calls radeon_ttm_tt_pin_userptr(), which uses provided user pointers for vma lookups, which can only by done with untagged pointers. This patch untags user pointers in radeon_gem_userptr_ioctl(). Signed-off-by: Andrey Konovalov Acked-by: Felix Kuehling --- drivers/gpu/drm/radeon/radeon_gem.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c index 44617dec8183..90eb78fb5eb2 100644 --- a/drivers/gpu/drm/radeon/radeon_gem.c +++ b/drivers/gpu/drm/radeon/radeon_gem.c @@ -291,6 +291,8 @@ int radeon_gem_userptr_ioctl(struct drm_device *dev, void *data, uint32_t handle; int r; + args->addr = untagged_addr(args->addr); + if (offset_in_page(args->addr | args->size)) return -EINVAL;