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[209.51.188.17]) by mx.google.com with ESMTPS id t128si28835574ybf.135.2020.06.27.00.04.49 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Sat, 27 Jun 2020 00:04:49 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=fail header.i=@redhat.com header.s=mimecast20190719 header.b=GyvYEOZ8; spf=pass (google.com: domain of qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from localhost ([::1]:51734 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jp4tN-0004QQ-10 for alex.bennee@linaro.org; Sat, 27 Jun 2020 03:04:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52182) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jp4s9-0003bt-Ij for qemu-devel@nongnu.org; Sat, 27 Jun 2020 03:03:34 -0400 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:52508 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jp4s5-0004GK-Vc for qemu-devel@nongnu.org; Sat, 27 Jun 2020 03:03:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1593241408; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=ootrqBJRKH2qUVzoBA6p2tLS+AjNZERDmQeZVCtW4Ts=; b=GyvYEOZ8z8D+qTRKouoWAeKHfqLmWyMyRLOIXoxDBivxPaQaBY2Q2V0+QZc6uEr8P/GWAx beRPG0S/OHu1DGii24ORzgNIv6BylbbUZMVJK4QAzT9JXpTze+V+rK5+vKMlo/OVOLLmT4 DMai2xl74zZBa0NJ7WFte8Y6cSeaDvk= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-452-VZH_Z0ZuPiO2hTrkhHvV2w-1; Sat, 27 Jun 2020 03:03:27 -0400 X-MC-Unique: VZH_Z0ZuPiO2hTrkhHvV2w-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A5B548015F4; Sat, 27 Jun 2020 07:03:25 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-112-121.ams2.redhat.com [10.36.112.121]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 41B2360BF4; Sat, 27 Jun 2020 07:03:17 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id C32BE11384A6; Sat, 27 Jun 2020 09:03:15 +0200 (CEST) From: Markus Armbruster To: Eric Auger Subject: Re: [PATCH v6 4/5] virtio-iommu-pci: Add array of Interval properties References: <20200626103057.11263-1-eric.auger@redhat.com> <20200626103057.11263-5-eric.auger@redhat.com> Date: Sat, 27 Jun 2020 09:03:15 +0200 In-Reply-To: <20200626103057.11263-5-eric.auger@redhat.com> (Eric Auger's message of "Fri, 26 Jun 2020 12:30:56 +0200") Message-ID: <87sgehrnws.fsf@dusky.pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain Received-SPF: pass client-ip=205.139.110.61; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/27 02:53:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, mst@redhat.com, qemu-devel@nongnu.org, peterx@redhat.com, jean-philippe@linaro.org, qemu-arm@nongnu.org, pbonzini@redhat.com, bbhushan2@marvell.com, eric.auger.pro@gmail.com Errors-To: qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org Sender: "Qemu-devel" X-TUID: CHiKZU94SWlC Eric Auger writes: > The machine may need to pass reserved regions to the > virtio-iommu-pci device (such as the MSI window on x86 > or the MSI doorbells on ARM). > > So let's add an array of Interval properties. > > Note: if some reserved regions are already set by the > machine code - which should be the case in general -, > the length of the property array is already set and > prevents the end-user from modifying them. For example, > attempting to use: > > -device virtio-iommu-pci,\ > len-reserved-regions=1,reserved-regions[0]=0xfee00000:0xfeefffff:1 > > would result in the following error message: > > qemu-system-aarch64: -device virtio-iommu-pci,addr=0xa, > len-reserved-regions=1,reserved-regions[0]=0xfee00000:0xfeefffff:1: > array size property len-reserved-regions may not be set more than once > > Otherwise, for example, adding two reserved regions is achieved > using the following options: > > -device virtio-iommu-pci,addr=0xa,len-reserved-regions=2,\ > reserved-regions[0]=0xfee00000:0xfeefffff:1,\ > reserved-regions[1]=0x1000000:100ffff:1 > > Signed-off-by: Eric Auger > > --- > v5 -> v6: > - check the type value > - removed Jean's R-b > > v3 -> v4: > - added examples in the commit message as suggested by Markus > - added Jean's R-b > --- > hw/virtio/virtio-iommu-pci.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/hw/virtio/virtio-iommu-pci.c b/hw/virtio/virtio-iommu-pci.c > index 632533abaf..9c9bda9490 100644 > --- a/hw/virtio/virtio-iommu-pci.c > +++ b/hw/virtio/virtio-iommu-pci.c > @@ -33,6 +33,9 @@ struct VirtIOIOMMUPCI { > > static Property virtio_iommu_pci_properties[] = { > DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), > + DEFINE_PROP_ARRAY("reserved-regions", VirtIOIOMMUPCI, > + vdev.nb_reserved_regions, vdev.reserved_regions, > + qdev_prop_reserved_region, ReservedRegion), > DEFINE_PROP_END_OF_LIST(), > }; > > @@ -40,6 +43,7 @@ static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) > { > VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(vpci_dev); > DeviceState *vdev = DEVICE(&dev->vdev); > + VirtIOIOMMU *s = VIRTIO_IOMMU(vdev); > > if (!qdev_get_machine_hotplug_handler(DEVICE(vpci_dev))) { > MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine()); > @@ -54,6 +58,15 @@ static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) > "-no-acpi\n"); > return; > } > + for (int i = 0; i < s->nb_reserved_regions; i++) { > + if (s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_RESERVED && > + s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_MSI) { > + error_setg(errp, "reserved region %d has an invalid type", i); > + error_append_hint(errp, "Valid values are " > + "VIRTIO_IOMMU_RESV_MEM_T_RESERVED and " > + "VIRTIO_IOMMU_RESV_MEM_T_SMI\n"); Actually, valid values are 0 and 1. Something like -device virtio-iommu-pci,len-reserved-regions=1,reserved-regions[0]=0xfee00000:0xfeefffff:VIRTIO_IOMMU_RESV_MEM_T_SMI will be rejected as invalid. > + } > + } > object_property_set_link(OBJECT(dev), > OBJECT(pci_get_bus(&vpci_dev->pci_dev)), > "primary-bus", errp); Sorry for having to torture you this way! Have a Reviewed-by: Markus Armbruster with the error message touched up.