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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,USER_AGENT_SANE_1 autolearn=no 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 95A50C4338F for ; Fri, 23 Jul 2021 13:34:55 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 313B860EB1 for ; Fri, 23 Jul 2021 13:34:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 313B860EB1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=collabora.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:58824 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m6vKI-00025q-5U for qemu-devel@archiver.kernel.org; Fri, 23 Jul 2021 09:34:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38178) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m6vJ3-0000Wb-Dr for qemu-devel@nongnu.org; Fri, 23 Jul 2021 09:33:39 -0400 Received: from bhuna.collabora.co.uk ([2a00:1098:0:82:1000:25:2eeb:e3e3]:33354) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m6vJ1-0007GB-4b for qemu-devel@nongnu.org; Fri, 23 Jul 2021 09:33:36 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: fahien) with ESMTPSA id D818B1F44C46 To: qemu-devel@nongnu.org From: Antonio Caggiano Subject: virtio-gpu: Mapping blob resources Message-ID: <0eb17319-0b1d-5f43-f5d9-8ccadb0839ef@collabora.com> Date: Fri, 23 Jul 2021 15:33:24 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2a00:1098:0:82:1000:25:2eeb:e3e3; envelope-from=antonio.caggiano@collabora.com; helo=bhuna.collabora.co.uk X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kraxel@redhat.com, Tomeu Vizoso , vivek.kasireddy@intel.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi, I am trying to implement blob resource mapping support, but there is something I still did not manage to figure out. According to the spec, VIRTIO_GPU_CMD_RESOURCE_MAP_BLOB maps a host-only blob resource into an offset in the host visible memory region. So, I believe I will need something like: > void *data = g->hotstmem[mblob.offset]; // pseudo-code > virgl_renderer_resource_map(..., &data, ...); Questions: - Does my approach make sense? - How do I get an address to the host visible memory region? Best regards, Antonio