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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 845CECF64B1 for ; Sat, 22 Nov 2025 07:49:49 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vMiK1-00088S-AS; Sat, 22 Nov 2025 02:46:18 -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 1vMhTG-0000bk-9e for qemu-devel@nongnu.org; Sat, 22 Nov 2025 01:51:54 -0500 Received: from mgamail.intel.com ([192.198.163.14]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vMhSk-0000qe-VG for qemu-devel@nongnu.org; Sat, 22 Nov 2025 01:51:44 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1763794275; x=1795330275; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=zdHvub0fJfbNNGqYIUwGIo1RD75YRQG0yqOJDJhrBGo=; b=bkLDAHiwLP458WIZAPcck9/bNrZoJ94iLu322y7NNuT6gmdDcgx40Wgw DKcUpwUbfWvWIcVRMwrDUXbCZi58KWLYU0ncV2e8Wrthx6ZlI+WH7Pfw3 L455V1zJpRyiEpuGVnoZi6BPF4gMtPJGL53Aa1plpdCKPeWTYJumuvgbq kf1yQ1VA1tiIFeo8Oq+rNcfQY7jGlN5dH6u0QgT7dTEtyy0+pskX4Vbk3 +tN7IkP+IWNWzfkiOSa0l18KQFI32iQcf9V29bGWicFOgCuRev77ieaeO xMDvimFiRhcRahmrFAiS6z9F4lHSOnqFzzqCtODZbcmee/VZ0xAXuWJHk Q==; X-CSE-ConnectionGUID: 0OrZmn0rQk+sBC1BQI4SuA== X-CSE-MsgGUID: O8qSPh2JSKGEWDpa4DmUKQ== X-IronPort-AV: E=McAfee;i="6800,10657,11620"; a="65924060" X-IronPort-AV: E=Sophos;i="6.20,217,1758610800"; d="scan'208";a="65924060" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by fmvoesa108.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Nov 2025 22:50:22 -0800 X-CSE-ConnectionGUID: 6CCEXX52QieXWPnoCwbmSw== X-CSE-MsgGUID: Jv4eG5KQSeC9ioWW7rgx7Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.20,217,1758610800"; d="scan'208";a="191064602" Received: from vkasired-desk2.fm.intel.com ([10.105.128.132]) by orviesa006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Nov 2025 22:50:22 -0800 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 v3 1/9] virtio-gpu: Recreate the resource's dmabuf if new backing is attached Date: Fri, 21 Nov 2025 22:46:22 -0800 Message-ID: <20251122064936.2948632-2-vivek.kasireddy@intel.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20251122064936.2948632-1-vivek.kasireddy@intel.com> References: <20251122064936.2948632-1-vivek.kasireddy@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=192.198.163.14; envelope-from=vivek.kasireddy@intel.com; helo=mgamail.intel.com X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, DKIM_INVALID=0.1, DKIM_SIGNED=0.1, T_SPF_HELO_TEMPERROR=0.01, T_SPF_TEMPERROR=0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org 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-André Lureau Cc: Alex Bennée Cc: Akihiko Odaki Cc: Dmitry Osipenko Cc: Alex Williamson Cc: Cédric 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 43e88a4daf..199b18c746 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 = VIRTIO_GPU_RESP_ERR_UNSPEC; return; } + + if (res->blob_size) { + virtio_gpu_init_udmabuf(res); + } } static void -- 2.50.1