From nobody Sun Jan 25 11:59:43 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1769149376; cv=none; d=zohomail.com; s=zohoarc; b=cUZfP2epOQHhONbEZcDkYyMf+2b7Iwc/qZwzbNZl9f4wNbdI7E+4L8emKjVbX6cFOp/PtA2MUmIpOhQbkiXTzev8qJ5VSe34hq/Yy1JITGSa5J01ycBEkerCWhFt3fqn8EpCk3N++WXkUElZwc+gXs4qI+W4Kktadnd1HfUbnwU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1769149376; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=Ft3LEhxsum4S5FvdDqC/n3QOiPW/l+92MGg1UY+nv8o=; b=hOmSKU3p2Q3vPlDWJ2rLLJoYtke4uHmKqjKc5ljjh3NJGXTzcXT1wpIbHqSEjQ1wsxBAtHAa/v6ogn48+sSrFT3yy/Br9G08fKjQAviO/7FDLjh5/ZWC2o7/k902woVs/sljR0TOCdP3W2A89AP7d2CPaN6+KGQeXHvP2/qzbsM= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1769149376140677.3117289895347; Thu, 22 Jan 2026 22:22:56 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vjAYj-000398-67; Fri, 23 Jan 2026 01:22:17 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vjAYg-00037w-QF for qemu-devel@nongnu.org; Fri, 23 Jan 2026 01:22:14 -0500 Received: from mgamail.intel.com ([198.175.65.14]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vjAYf-0000rq-9S for qemu-devel@nongnu.org; Fri, 23 Jan 2026 01:22:14 -0500 Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jan 2026 22:22:05 -0800 Received: from unknown (HELO vkasired-desk2.fm.intel.com) ([10.105.128.132]) by fmviesa010-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jan 2026 22:22:04 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1769149333; x=1800685333; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=BU+2P8UJQiCNZ6B+Dn1fq51GInHfsJ6cD01Wea2i1DY=; b=g7L88dEWwGYX9nLN0FUd4/lKTpqx4nW1rY/fa9Yflvsmg3JWioW275wG USXKxaDU5pSnG13OjE1c38n1D19/IY3FzXs3tiKDLep1PU2PIU7aXjmrs 4PVOcF6VBReYCv2zrmV4XpFasmxfusceWoakud9QzG3Ov/JRhAxVmYfD5 NXO8StAmbaX2AendAm6rA+CyG0yji33Ze84wyo3/xcCwnEEWdG+l803Ky IsfaLyNDnANh3kf7GMjhmMwilA3TQ63IVvEYNxljroW8/oqYny2eMtr92 LGzMpk3XMy23C+GddT/eUES6zR+F8fGSiJY35fYDXlwoDliwf/sFxeLDH w==; X-CSE-ConnectionGUID: YOVSj1+zR6WG0dEIgBnXFA== X-CSE-MsgGUID: G6qjtix6Qn+gofB05iFhOw== X-IronPort-AV: E=McAfee;i="6800,10657,11679"; a="74254182" X-IronPort-AV: E=Sophos;i="6.21,247,1763452800"; d="scan'208";a="74254182" X-CSE-ConnectionGUID: Ijso7S6YTBWtypbx9ohbuQ== X-CSE-MsgGUID: ZpdkPEXZRxKvSTs83IKxmg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,247,1763452800"; d="scan'208";a="207287399" From: Vivek Kasireddy To: qemu-devel@nongnu.org Cc: Vivek Kasireddy , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Akihiko Odaki , Dmitry Osipenko , Alex Williamson , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Subject: [PATCH v4 1/8] virtio-gpu: Recreate the resource's dmabuf if new backing is attached Date: Thu, 22 Jan 2026 22:17:40 -0800 Message-ID: <20260123062042.568703-2-vivek.kasireddy@intel.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260123062042.568703-1-vivek.kasireddy@intel.com> References: <20260123062042.568703-1-vivek.kasireddy@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=198.175.65.14; envelope-from=vivek.kasireddy@intel.com; helo=mgamail.intel.com X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.07, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1769149378074154100 There are cases when a blob resource's backing might get detached and re-attached again such as when the underlying object is getting migrated in the Guest. In these situations, we need to obtain a new dmabuf fd, which can be done by calling virtio_gpu_init_udmabuf(). Cc: Marc-Andr=C3=A9 Lureau Cc: Alex Benn=C3=A9e Cc: Akihiko Odaki Cc: Dmitry Osipenko Cc: Alex Williamson Cc: C=C3=A9dric Le Goater Reviewed-by: Akihiko Odaki Signed-off-by: Vivek Kasireddy --- hw/display/virtio-gpu.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c index f23eec6862..3d58cebf4b 100644 --- a/hw/display/virtio-gpu.c +++ b/hw/display/virtio-gpu.c @@ -937,6 +937,10 @@ virtio_gpu_resource_attach_backing(VirtIOGPU *g, cmd->error =3D VIRTIO_GPU_RESP_ERR_UNSPEC; return; } + + if (res->blob_size) { + virtio_gpu_init_udmabuf(res); + } } =20 static void --=20 2.50.1