From nobody Wed Nov 27 19:47:29 2024 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=1697446309; cv=none; d=zohomail.com; s=zohoarc; b=Oev7RqhVlPaMgWtN1JZ0VrIo7oKDmE8Zwao4SZpVWBe+EfEGKxdYwMXkDr9jj98ajvrlES8iO2SB+FHGWRXsI+6vARt0h06OQppXuMd39UEBNWUUyFu5CW+R2Zp7j2kphM7MPBtffmxx+/u8MVzbW+u1+b/nIwTWxU5Sa1zWnQA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1697446309; h=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=la3Gp6ayJ/8ZZLQn5A5Ip1OIFkl4JFxKXrFyIHVbqcA=; b=hW28MwPFOJvf3j9WOmQk3iws/R6LacNbuIjODLS3odQoCL3kV7xEYDEb5O0vgDj7kIQaXmkbjzw3mGoAe/1cRogUSwQwq82cnFKSojoTeIh0M0+86J7ZKrCr1yMC9a8g9++ouwFMLHhMmdAgZaAZFRPXovdjb3MBfjDAc15nJD8= 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 16974463092241009.2809959995146; Mon, 16 Oct 2023 01:51:49 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qsJII-0005XM-L5; Mon, 16 Oct 2023 04:49:46 -0400 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 1qsJI9-0005Ke-Uc; Mon, 16 Oct 2023 04:49:38 -0400 Received: from mgamail.intel.com ([192.55.52.151]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qsJI6-0001LN-Dg; Mon, 16 Oct 2023 04:49:36 -0400 Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Oct 2023 01:49:11 -0700 Received: from duan-server-s2600bt.bj.intel.com ([10.240.192.147]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Oct 2023 01:49:07 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697446174; x=1728982174; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=5sTywzEaEW0RCTiGenM/26nMo0a4RpA9GhP1ZwXXWqg=; b=CSLw8Bofg+PJHee5P9D1RjBWPjBM1ggzj7Hu5G4A7d8w9GeCNYqdWAyB xauNoQevav2m48QM4K0ASF15WRSVtnvoIQ1iyj8IoHsQuupbWD8PzCtwX 2C1ZltKeaG6InjtQgVdkdZaNmEUNvf+YhcN7Qt4Cup5PUxsCzMDGlXDFD /D8Gm7bXs2hpvaaC6VG3sXEg7z+ye34Ix2FAi4hXYXUCVVXGYbUnZ+Wvz fkeLU3MKEdOXmJKK8QfkpKNB/NSmqNOjjeoC+nMVzeVKWYvWIGR6Wonh+ qWh0htFgmgPDMWTHvNaKIZt3ZAv8iZJe6/tQceXJFP9xyLk3Sh1CXdfTf w==; X-IronPort-AV: E=McAfee;i="6600,9927,10863"; a="365737756" X-IronPort-AV: E=Sophos;i="6.03,229,1694761200"; d="scan'208";a="365737756" X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10863"; a="749223075" X-IronPort-AV: E=Sophos;i="6.03,229,1694761200"; d="scan'208";a="749223075" 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 , Thomas Huth , Tony Krowiak , Halil Pasic , Jason Herne , qemu-s390x@nongnu.org (open list:S390 general arch...) Subject: [PATCH v2 26/27] vfio/ap: Make vfio cdev pre-openable by passing a file handle Date: Mon, 16 Oct 2023 16:32:22 +0800 Message-Id: <20231016083223.1519410-27-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231016083223.1519410-1-zhenzhong.duan@intel.com> References: <20231016083223.1519410-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 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 client-ip=192.55.52.151; 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 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1697446309736100001 Content-Type: text/plain; charset="utf-8" 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. Opportunisticly, remove some unnecessory double-cast. Signed-off-by: Zhenzhong Duan --- hw/vfio/ap.c | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index 1f8e88aeb3..a34cae31a2 100644 --- a/hw/vfio/ap.c +++ b/hw/vfio/ap.c @@ -30,6 +30,7 @@ #include "hw/s390x/ap-bridge.h" #include "exec/address-spaces.h" #include "qom/object.h" +#include "monitor/monitor.h" =20 #define TYPE_VFIO_AP_DEVICE "vfio-ap" =20 @@ -160,7 +161,10 @@ static void vfio_ap_realize(DeviceState *dev, Error **= errp) VFIOAPDevice *vapdev =3D VFIO_AP_DEVICE(dev); VFIODevice *vbasedev =3D &vapdev->vdev; =20 - vbasedev->name =3D g_path_get_basename(vbasedev->sysfsdev); + if (vfio_device_get_name(vbasedev, errp)) { + return; + } + vbasedev->ops =3D &vfio_ap_ops; vbasedev->type =3D VFIO_DEVICE_TYPE_AP; vbasedev->dev =3D dev; @@ -230,11 +234,36 @@ static const VMStateDescription vfio_ap_vmstate =3D { .unmigratable =3D 1, }; =20 +static void vfio_ap_instance_init(Object *obj) +{ + VFIOAPDevice *vapdev =3D VFIO_AP_DEVICE(obj); + + vapdev->vdev.fd =3D -1; +} + +#ifdef CONFIG_IOMMUFD +static void vfio_ap_set_fd(Object *obj, const char *str, Error **errp) +{ + VFIOAPDevice *vapdev =3D VFIO_AP_DEVICE(obj); + int fd =3D -1; + + fd =3D monitor_fd_param(monitor_cur(), str, errp); + if (fd =3D=3D -1) { + error_prepend(errp, "Could not parse remote object fd %s:", str); + return; + } + vapdev->vdev.fd =3D fd; +} +#endif + static void vfio_ap_class_init(ObjectClass *klass, void *data) { DeviceClass *dc =3D DEVICE_CLASS(klass); =20 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 =3D &vfio_ap_vmstate; dc->desc =3D "VFIO-based AP device assignment"; set_bit(DEVICE_CATEGORY_MISC, dc->categories); @@ -249,6 +278,7 @@ static const TypeInfo vfio_ap_info =3D { .name =3D TYPE_VFIO_AP_DEVICE, .parent =3D TYPE_AP_DEVICE, .instance_size =3D sizeof(VFIOAPDevice), + .instance_init =3D vfio_ap_instance_init, .class_init =3D vfio_ap_class_init, }; =20 --=20 2.34.1