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 20F11D65C58 for ; Thu, 14 Nov 2024 07:57:36 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tBUir-0005Wc-LJ; Thu, 14 Nov 2024 02:57:01 -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 1tBUio-0005T5-8I; Thu, 14 Nov 2024 02:56:59 -0500 Received: from frasgout.his.huawei.com ([185.176.79.56]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tBUim-0000gu-Aw; Thu, 14 Nov 2024 02:56:58 -0500 Received: from mail.maildlp.com (unknown [172.18.186.31]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Xpspj1hL5z6J65C; Thu, 14 Nov 2024 15:53:33 +0800 (CST) Received: from frapeml100008.china.huawei.com (unknown [7.182.85.131]) by mail.maildlp.com (Postfix) with ESMTPS id 2F923140257; Thu, 14 Nov 2024 15:56:45 +0800 (CST) Received: from frapeml500008.china.huawei.com (7.182.85.71) by frapeml100008.china.huawei.com (7.182.85.131) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Thu, 14 Nov 2024 08:56:44 +0100 Received: from frapeml500008.china.huawei.com ([7.182.85.71]) by frapeml500008.china.huawei.com ([7.182.85.71]) with mapi id 15.01.2507.039; Thu, 14 Nov 2024 08:56:44 +0100 To: Nicolin Chen , "nathanc@nvidia.com" CC: "qemu-arm@nongnu.org" , "qemu-devel@nongnu.org" , "eric.auger@redhat.com" , "peter.maydell@linaro.org" , "jgg@nvidia.com" , "ddutile@redhat.com" , Linuxarm , "Wangzhou (B)" , jiangkunkun , Jonathan Cameron , "zhangfei.gao@linaro.org" Subject: RE: [RFC PATCH 0/5] hw/arm/virt: Add support for user-creatable nested SMMUv3 Thread-Topic: [RFC PATCH 0/5] hw/arm/virt: Add support for user-creatable nested SMMUv3 Thread-Index: AQHbMeB0+Q5BEZc9JkeH/U6Jz+dF4rK0OI0AgAI473A= Date: Thu, 14 Nov 2024 07:56:44 +0000 Message-ID: <13d6ed940bd44b3fa46aa9bc11f36bb5@huawei.com> References: <20241108125242.60136-1-shameerali.kolothum.thodi@huawei.com> In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.203.177.241] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Received-SPF: pass client-ip=185.176.79.56; envelope-from=shameerali.kolothum.thodi@huawei.com; helo=frasgout.his.huawei.com X-Spam_score_int: -48 X-Spam_score: -4.9 X-Spam_bar: ---- X-Spam_report: (-4.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-0.738, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_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: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Shameerali Kolothum Thodi From: Shameerali Kolothum Thodi via Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org > -----Original Message----- > From: Nicolin Chen > Sent: Tuesday, November 12, 2024 11:00 PM > To: Shameerali Kolothum Thodi > ; nathanc@nvidia.com > Cc: qemu-arm@nongnu.org; qemu-devel@nongnu.org; > eric.auger@redhat.com; peter.maydell@linaro.org; jgg@nvidia.com; > ddutile@redhat.com; Linuxarm ; Wangzhou (B) > ; jiangkunkun ; > Jonathan Cameron ; > zhangfei.gao@linaro.org > Subject: Re: [RFC PATCH 0/5] hw/arm/virt: Add support for user-creatable > nested SMMUv3 >=20 > On Fri, Nov 08, 2024 at 12:52:37PM +0000, Shameer Kolothum wrote: > > Few ToDos to note, > > 1. At present default-bus-bypass-iommu=3Don should be set when > > arm-smmuv3-nested dev is specified. Otherwise you may get an IORT > > related boot error. Requires fixing. > > 2. Hot adding a device is not working at the moment. Looks like pcihp i= rq > issue. > > Could be a bug in IORT id mappings. >=20 > Do we have enough bus number space for each pbx bus in IORT? >=20 > The bus range is defined by min_/max_bus in hort_host_bridges(), > where the pci_bus_range() function call might not leave enough > space in the range for hotplugs IIRC. Ok. Thanks for the pointer. I will debug that. > > ./qemu-system-aarch64 -machine virt,gic-version=3D3,default-bus-bypass- > iommu=3Don \ > > -enable-kvm -cpu host -m 4G -smp cpus=3D8,maxcpus=3D8 \ > > -object iommufd,id=3Diommufd0 \ > > -bios QEMU_EFI.fd \ > > -kernel Image \ > > -device virtio-blk-device,drive=3Dfs \ > > -drive if=3Dnone,file=3Drootfs.qcow2,id=3Dfs \ > > -device pxb-pcie,id=3Dpcie.1,bus_nr=3D8,bus=3Dpcie.0 \ > > -device pcie-root-port,id=3Dpcie.port1,bus=3Dpcie.1,chassis=3D1 \ > > -device arm-smmuv3-nested,id=3Dsmmuv1,pci-bus=3Dpcie.1 \ > > -device vfio-pci,host=3D0000:7d:02.1,bus=3Dpcie.port1,iommufd=3Diommufd= 0 \ > > -device pxb-pcie,id=3Dpcie.2,bus_nr=3D16,bus=3Dpcie.0 \ > > -device pcie-root-port,id=3Dpcie.port2,bus=3Dpcie.2,chassis=3D2 \ > > -device arm-smmuv3-nested,id=3Dsmmuv2,pci-bus=3Dpcie.2 \ > > -device vfio-pci,host=3D0000:75:00.1,bus=3Dpcie.port2,iommufd=3Diommufd= 0 \ > > -append "rdinit=3Dinit console=3DttyAMA0 root=3D/dev/vda2 rw > earlycon=3Dpl011,0x9000000" \ > > -device virtio-9p-pci,fsdev=3Dp9fs2,mount_tag=3Dp9,bus=3Dpcie.0 \ > > -fsdev local,id=3Dp9fs2,path=3Dp9root,security_model=3Dmapped \ > > -net none \ > > -nographic > .. > > With a pci topology like below, > > [root@localhost ~]# lspci -tv > > -+-[0000:00]-+-00.0 Red Hat, Inc. QEMU PCIe Host bridge > > | +-01.0 Red Hat, Inc. QEMU PCIe Expander bridge > > | +-02.0 Red Hat, Inc. QEMU PCIe Expander bridge > > | \-03.0 Virtio: Virtio filesystem > > +-[0000:08]---00.0-[09]----00.0 Huawei Technologies Co., Ltd. HNS > Network Controller (Virtual Function) > > \-[0000:10]---00.0-[11]----00.0 Huawei Technologies Co., Ltd. HiSilic= on ZIP > Engine(Virtual Function) > > [root@localhost ~]# > > > > And if you want to add another HNS VF, it should be added to the same > SMMUv3 > > as of the first HNS dev, > > > > -device pcie-root-port,id=3Dpcie.port3,bus=3Dpcie.1,chassis=3D3 \ > > -device vfio-pci,host=3D0000:7d:02.2,bus=3Dpcie.port3,iommufd=3Diommufd= 0 \ > .. > > At present Qemu is not doing any extra validation other than the above > > failure to make sure the user configuration is correct or not. The > > assumption is libvirt will take care of this. >=20 > Nathan from NVIDIA side is working on the libvirt. And he already > did some prototype coding in libvirt that could generate required > PCI topology. I think he can take this patches for a combined test. Cool. That's good to know. Thanks, SHameer