From patchwork Tue Nov 14 10:09:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Zhenzhong Duan X-Patchwork-Id: 1863568 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=L9q29O64; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4SV2c13V1Dz1yR8 for ; Tue, 14 Nov 2023 21:29:53 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r2qcy-0004Wv-Fo; Tue, 14 Nov 2023 05:26:40 -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 1r2qcx-0004Rv-Gk; Tue, 14 Nov 2023 05:26:39 -0500 Received: from mgamail.intel.com ([134.134.136.65]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r2qcu-0007jy-PD; Tue, 14 Nov 2023 05:26:39 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1699957596; x=1731493596; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=RXsyrbJgSoRnpGEUEEreUHMRdEP1Hn21/DtQvMqC8FQ=; b=L9q29O649rRaUdo11x40v2AR4bmD6YmBj2KTJZ5QeaVKuc/F4t4LmXx8 TyvpHy4XryP18mYZxbYEVgGUZWE3CyWY0OZZlT14T+iVoy3Ub7CHL5LB3 53rU6bbxlNe99qLJEp1ynfn/41k55ed64cG8WuHd3ynENLx006mQbOAx1 wG5bpNtxWByVxjHx2sy23s+GPrbeCbnzjclfT63VtgH8HzmRZD6BuYvwB UKek1+A3GPrLwyee8ADu6ZMegYRjquZmFN2ZW5lETbFcLf5FXj2kCBmc8 CpCAQBIcR6barvKSyIYl7WXefZae+yU1776gSovwxXTXvys/B5q0KBdfz w==; X-IronPort-AV: E=McAfee;i="6600,9927,10893"; a="394543650" X-IronPort-AV: E=Sophos;i="6.03,301,1694761200"; d="scan'208";a="394543650" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Nov 2023 02:26:35 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10893"; a="888213155" X-IronPort-AV: E=Sophos;i="6.03,301,1694761200"; d="scan'208";a="888213155" Received: from duan-server-s2600bt.bj.intel.com ([10.240.192.147]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Nov 2023 02:26:29 -0800 From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com, joao.m.martins@oracle.com, eric.auger@redhat.com, peterx@redhat.com, jasowang@redhat.com, kevin.tian@intel.com, yi.l.liu@intel.com, yi.y.sun@intel.com, chao.p.peng@intel.com, Zhenzhong Duan , Matthew Rosato , Tony Krowiak , Halil Pasic , Jason Herne , Thomas Huth , qemu-s390x@nongnu.org (open list:vfio-ap) Subject: [PATCH v6 15/21] vfio/ap: Make vfio cdev pre-openable by passing a file handle Date: Tue, 14 Nov 2023 18:09:49 +0800 Message-Id: <20231114100955.1961974-16-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231114100955.1961974-1-zhenzhong.duan@intel.com> References: <20231114100955.1961974-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=134.134.136.65; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org This gives management tools like libvirt a chance to open the vfio cdev with privilege and pass FD to qemu. This way qemu never needs to have privilege to open a VFIO or iommu cdev node. Signed-off-by: Zhenzhong Duan Reviewed-by: Matthew Rosato Reviewed-by: Cédric Le Goater --- hw/vfio/ap.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index 80629609ae..b21f92291e 100644 --- a/hw/vfio/ap.c +++ b/hw/vfio/ap.c @@ -160,7 +160,10 @@ static void vfio_ap_realize(DeviceState *dev, Error **errp) VFIOAPDevice *vapdev = VFIO_AP_DEVICE(dev); VFIODevice *vbasedev = &vapdev->vdev; - vbasedev->name = g_path_get_basename(vbasedev->sysfsdev); + if (vfio_device_get_name(vbasedev, errp)) { + return; + } + vbasedev->ops = &vfio_ap_ops; vbasedev->type = VFIO_DEVICE_TYPE_AP; vbasedev->dev = dev; @@ -230,11 +233,28 @@ static const VMStateDescription vfio_ap_vmstate = { .unmigratable = 1, }; +static void vfio_ap_instance_init(Object *obj) +{ + VFIOAPDevice *vapdev = VFIO_AP_DEVICE(obj); + + vapdev->vdev.fd = -1; +} + +#ifdef CONFIG_IOMMUFD +static void vfio_ap_set_fd(Object *obj, const char *str, Error **errp) +{ + vfio_device_set_fd(&VFIO_AP_DEVICE(obj)->vdev, str, errp); +} +#endif + static void vfio_ap_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); device_class_set_props(dc, vfio_ap_properties); +#ifdef CONFIG_IOMMUFD + object_class_property_add_str(klass, "fd", NULL, vfio_ap_set_fd); +#endif dc->vmsd = &vfio_ap_vmstate; dc->desc = "VFIO-based AP device assignment"; set_bit(DEVICE_CATEGORY_MISC, dc->categories); @@ -249,6 +269,7 @@ static const TypeInfo vfio_ap_info = { .name = TYPE_VFIO_AP_DEVICE, .parent = TYPE_AP_DEVICE, .instance_size = sizeof(VFIOAPDevice), + .instance_init = vfio_ap_instance_init, .class_init = vfio_ap_class_init, };