From patchwork Mon Jun 3 16:55:12 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10973305 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 6FC0B6C5 for ; Mon, 3 Jun 2019 16:56:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5D12F28684 for ; Mon, 3 Jun 2019 16:56:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4FF142873C; Mon, 3 Jun 2019 16:56:01 +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 D78DE28684 for ; Mon, 3 Jun 2019 16:56:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729642AbfFCQz6 (ORCPT ); Mon, 3 Jun 2019 12:55:58 -0400 Received: from mail-qt1-f202.google.com ([209.85.160.202]:47346 "EHLO mail-qt1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728320AbfFCQz5 (ORCPT ); Mon, 3 Jun 2019 12:55:57 -0400 Received: by mail-qt1-f202.google.com with SMTP id c54so8087546qtc.14 for ; Mon, 03 Jun 2019 09:55:56 -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=QTQ4ZZ+1ONHvx3iNcSe/c62gqBzIbuX20WtdiRnopfw=; b=Iulw2LDXuMXrguiNT2nc8pImmlAd9SEaHxzy+PIXZoC7Ry1861+IgSJT7msXK0lxjW Stlg9JACJI0q7DDqW7dFD1lXLlRa2BWigOxwo5Vw8cFe6qNirKkII0FhPNgtUk9+cp1T aHJGoLoDr4Q8979Fk7TFLPwhp9/TzWuYwglUurKj3rFU9GpRJ5xL6D7/jxXgMSu4llum hXs/FNVkTTazIDAfHhBMirRaAiVUM4CzdwvnR1yvQzgHmFdNai1A63k4wvi7etXyFGuo QDD/dhSJypo/bxB/7BkdNMWk1BD1fsQcPpD2mwu3O8zxH9SkplM6OKzkYqDvbWZfOgAq 9GzA== 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=QTQ4ZZ+1ONHvx3iNcSe/c62gqBzIbuX20WtdiRnopfw=; b=cqe7wZlTy+hDoArYEF7uk4r2Z+Sb0VHV7Vq7ANTo1S/SL/AzTvz0Zzh8XBDCEctBGV XbPsEnr8z5DweEkYdnHG5lRqSJ1zxyqi3KwDGZW3jDm/vEmL+YLSGGZB1zf+acGLXduM z2QIgKlQj8ihrdgDUSN4iXhNPsVK8ODXkryWcnQUIwgEFJa3Bpao6G8kEhrhV6rpmXrh iom6/GiXebHOuVnU0cZRrnw+IXrqA/sAhWhWemXey54wCy5wIDcrBKatH9TDLqM0Cz7D N3I7GUBAAMBPieQTN39kEzjqOAVO5xBbnCO8UCvZKcoMtSTYW0QJv4rlL/G6qA8NDqSV va1g== X-Gm-Message-State: APjAAAUminJ6eVV7zOGFCfncboLMpsSypPz2rNHQOnsVkrQFjWNclvX5 3ThcjtSPOtM1ZM1kjMwIVbdZ9cIkhNjeSV6o X-Google-Smtp-Source: APXvYqynCi8uC9mwY5hf72ttWfEiYBsQ+6wl0nvKi3Uj+AQb+Ufw5GSOsuV9qYkE0ai47XUYEZWA+IZ0Az+FoQAg X-Received: by 2002:a37:8002:: with SMTP id b2mr23304828qkd.289.1559580956267; Mon, 03 Jun 2019 09:55:56 -0700 (PDT) Date: Mon, 3 Jun 2019 18:55:12 +0200 In-Reply-To: Message-Id: <47d4e95b61013933ffe4f0be8832d03179d94b27.1559580831.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.22.0.rc1.311.g5d7573a151-goog Subject: [PATCH v16 10/16] drm/amdgpu, arm64: 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 , Kuehling@google.com 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 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. Suggested-by: Kuehling, Felix 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 a6e5184d436c..5d476e9bbc43 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -1108,7 +1108,7 @@ 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) { domain = AMDGPU_GEM_DOMAIN_GTT; alloc_domain = AMDGPU_GEM_DOMAIN_CPU; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index d4fcf5475464..e91df1407618 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -287,6 +287,8 @@ 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;