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=-16.4 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_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 D513CC43613 for ; Mon, 24 Jun 2019 14:33:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AE429213F2 for ; Mon, 24 Jun 2019 14:33:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="tMmuoJLk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729546AbfFXOdl (ORCPT ); Mon, 24 Jun 2019 10:33:41 -0400 Received: from mail-vk1-f201.google.com ([209.85.221.201]:41078 "EHLO mail-vk1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729431AbfFXOdj (ORCPT ); Mon, 24 Jun 2019 10:33:39 -0400 Received: by mail-vk1-f201.google.com with SMTP id f125so6439114vkc.8 for ; Mon, 24 Jun 2019 07:33:38 -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=BJsyngqG/QyGrxCP5QV1VgvY/ZIDb46yXFdUWUYcJjE=; b=tMmuoJLkJJRlr97nWuw9yp1dhBnjJgJJVctCCMOkVQAwVufIWjtRSJ98DeVWMAUpL7 c/DDMKTfXjJ3AunXbS9PbtesoR3v6FwAquf/mPo2ipW5m7uKq3mz622OTJgF//P41VeY uBPVky3FH88ifuyXm9IjyMmdhNWu2I8INL87p4oZ1vAogbY0BRq3PmSNaYTl1n/7bnrO Lc9PPi+EV8QQhe4FjeigOim3EKL5tCU2OhJP5k8d+H2v0cMsX/+SwQBn01vR1S+aYe8q kmK501SZalx1YaFY0Y1ChZDATvY9Cs1dirj078l2AUk0ox9yU2Ud6XA8n+4rc4SVim6s D61A== 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=BJsyngqG/QyGrxCP5QV1VgvY/ZIDb46yXFdUWUYcJjE=; b=jpOf5JNMxiVgtmqw+rvo+IaclFOS9G3XAmKAPekZUcwCVQYDWOjWXS8UdI/bu2OHjg JSzPpCdE7KQKHzQN50GYIj8yp4xI7j4+XhfmBdHyVkqBwncRhwC6d0nhSQgDCnk2NJIX JluN8+fhkK6Vwt5QxR5dxTBNgw6eSS8uGZwE7NcEyVwFJkSmqVORMZ3WAa2lYdoK8GBS yMWnSuTDZ4RJ1J3JxbjwIlINvoZBv5bxxVW909jp/IB3oE7WrLmBui157Ft9cByMiJAW H2DCYouKvxIbszznzl/xYq6gqordkMxJoVT8shLB37TD8FVn6v2x9PXYFmDyedVH/5F+ NOyQ== X-Gm-Message-State: APjAAAV+jQB0J/HjbR45aSQRfnaZZaTL6fePWJvlLW49stz42Q5GhL2D 7XeoZL3w1q1dlyCOUQOT9YWQNhXtGYCINUU6 X-Google-Smtp-Source: APXvYqxgB5X/aCbKs9hmuZWtlXYS7x7msb4DLFufqsMoO6mME7B8su644ppdcEygFH1GnaKdKATNFxnkdsXw3C2U X-Received: by 2002:ab0:7782:: with SMTP id x2mr22851192uar.140.1561386818133; Mon, 24 Jun 2019 07:33:38 -0700 (PDT) Date: Mon, 24 Jun 2019 16:32:55 +0200 In-Reply-To: Message-Id: <61d800c35a4f391218fbca6f05ec458557d8d097.1561386715.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH v18 10/15] drm/radeon: 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 , Luc Van Oostenryck , Dave Martin , Khalid Aziz , enh , Jason Gunthorpe , Christoph Hellwig , Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , 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 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(). Suggested-by: Felix Kuehling Acked-by: Felix Kuehling Signed-off-by: Andrey Konovalov --- 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; -- 2.22.0.410.gd8fdbe21b5-goog