From patchwork Tue Jul 23 17:58:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 11054879 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 50263746 for ; Tue, 23 Jul 2019 17:59:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 40FF3286C6 for ; Tue, 23 Jul 2019 17:59:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 33D56286E0; Tue, 23 Jul 2019 17:59:38 +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 B5064286C6 for ; Tue, 23 Jul 2019 17:59:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388453AbfGWR7h (ORCPT ); Tue, 23 Jul 2019 13:59:37 -0400 Received: from mail-qk1-f202.google.com ([209.85.222.202]:48952 "EHLO mail-qk1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391347AbfGWR7g (ORCPT ); Tue, 23 Jul 2019 13:59:36 -0400 Received: by mail-qk1-f202.google.com with SMTP id z13so37109575qka.15 for ; Tue, 23 Jul 2019 10:59:36 -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=bNeVrTrPvpjyJWHVtXYqgQlj6F1/0IzkZ0bc3aEFST0=; b=uWaCwrDkBN5GRSLhaw7WQwMKcK3AhPqO/fzElVN3JcPy98UFLj7JeXsg8P+SLlr/8N uTaOa6VggUuncDHcvq/dm+VjbWoXQVCEMVj3yqEv0lzhkp6ZqhxIJZIXWJox0QqwZPpw oblQlXNCYt4tHVrvlJypYdteLVvehIkVLfAlFHjgdjHvnPpCAD6GJOEurxmklM0IOqwa r3we5GB8/FJKwWzwzqUCJtO6E9+uXUbwxjMkihzlNrMKNzLhjZggf+0ZB/LMAafHfS91 EJUlnCmBt8+isj3aFtdbAWI7Fy268Gzi52Ek2+IZaH/c0AJ5vAsChMY+9qCOx6dYD5bK 14lw== 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=bNeVrTrPvpjyJWHVtXYqgQlj6F1/0IzkZ0bc3aEFST0=; b=I8bvEBJqF3dertVSOn3WTxb3R4nvikTGCUHrW+inkgZTgBBMwXsYRBHZpjnJcnewRn sAEMt7pBMD/rXthxTdhb32/D7GuY4trM0PJNItMAdb9RLaY1iz8DL/eT8VY+yXhtpO4G uwd/EGdPWzCLvLjiaAcxx6X8NeB1k+oY23WTf7F17NAiOakIEn+cxMDl7tyeVE1UYgJt gmMHXRF/+pBILF2W69FIW1pc8aWxWZxht1hXJPMXIaeK5fR4Z5bVsHmPFt/MvDaTQIoo UQ9U4deJcZlx0r3FvTqDuOYQefYovsslJzSmLmadXuTLN0mzWhCsQxb3WzaSEFfFrtsg RQOQ== X-Gm-Message-State: APjAAAVTOEhfhQBu4WEPc7k85fbJTFgFGFXBnC2/kwvyDczKyKG9HTe4 kujXglfeF6TW/ngxo5gtevjzMhyKdcVpjlhs X-Google-Smtp-Source: APXvYqyRt/sslYOExeWvOFH4KfKnKxW+V8w8qG436u1Li2H+fm4BIS46hHRf2O8j3VSTAztC1lSBD2N1vfHNfs72 X-Received: by 2002:a05:620a:522:: with SMTP id h2mr54247961qkh.329.1563904775319; Tue, 23 Jul 2019 10:59:35 -0700 (PDT) Date: Tue, 23 Jul 2019 19:58:46 +0200 In-Reply-To: Message-Id: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.22.0.709.g102302147b-goog Subject: [PATCH v19 09/15] drm/amdgpu: untag user pointers 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 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 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. In amdgpu_gem_userptr_ioctl() and amdgpu_amdkfd_gpuvm.c/init_user_pages() 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 patch untag user pointers in amdgpu_gem_userptr_ioctl() for the GEM case and in amdgpu_amdkfd_gpuvm_ alloc_memory_of_gpu() for the KFD case. This also makes sure that an untagged pointer is passed to amdgpu_ttm_tt_get_user_pages(), which uses it for vma lookups. Reviewed-by: Kees Cook Suggested-by: Felix Kuehling Acked-by: Felix Kuehling Signed-off-by: Andrey Konovalov --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index 1d3ee9c42f7e..00468ebf8b76 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -1103,7 +1103,7 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu( alloc_flags = 0; if (!offset || !*offset) return -EINVAL; - user_addr = *offset; + user_addr = untagged_addr(*offset); } else if (flags & (ALLOC_MEM_FLAGS_DOORBELL | ALLOC_MEM_FLAGS_MMIO_REMAP)) { domain = AMDGPU_GEM_DOMAIN_GTT; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index 939f8305511b..d7855842fd51 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -291,6 +291,8 @@ int amdgpu_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;