8077b8e549
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 <eric.auger@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Reviewed-by: Peter Xu <peterx@redhat.com> Message-id: 20200629070404.10969-5-eric.auger@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
115 lines
3.8 KiB
C
115 lines
3.8 KiB
C
/*
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* Virtio IOMMU PCI Bindings
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*
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* Copyright (c) 2019 Red Hat, Inc.
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* Written by Eric Auger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 or
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* (at your option) any later version.
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*/
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#include "qemu/osdep.h"
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#include "virtio-pci.h"
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#include "hw/virtio/virtio-iommu.h"
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#include "hw/qdev-properties.h"
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#include "qapi/error.h"
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#include "hw/boards.h"
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typedef struct VirtIOIOMMUPCI VirtIOIOMMUPCI;
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/*
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* virtio-iommu-pci: This extends VirtioPCIProxy.
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*
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*/
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#define VIRTIO_IOMMU_PCI(obj) \
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OBJECT_CHECK(VirtIOIOMMUPCI, (obj), TYPE_VIRTIO_IOMMU_PCI)
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struct VirtIOIOMMUPCI {
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VirtIOPCIProxy parent_obj;
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VirtIOIOMMU vdev;
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};
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static Property virtio_iommu_pci_properties[] = {
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DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
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DEFINE_PROP_ARRAY("reserved-regions", VirtIOIOMMUPCI,
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vdev.nb_reserved_regions, vdev.reserved_regions,
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qdev_prop_reserved_region, ReservedRegion),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
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{
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VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(vpci_dev);
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DeviceState *vdev = DEVICE(&dev->vdev);
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VirtIOIOMMU *s = VIRTIO_IOMMU(vdev);
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if (!qdev_get_machine_hotplug_handler(DEVICE(vpci_dev))) {
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MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
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error_setg(errp,
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"%s machine fails to create iommu-map device tree bindings",
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mc->name);
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error_append_hint(errp,
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"Check your machine implements a hotplug handler "
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"for the virtio-iommu-pci device\n");
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error_append_hint(errp, "Check the guest is booted without FW or with "
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"-no-acpi\n");
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return;
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}
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for (int i = 0; i < s->nb_reserved_regions; i++) {
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if (s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_RESERVED &&
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s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_MSI) {
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error_setg(errp, "reserved region %d has an invalid type", i);
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error_append_hint(errp, "Valid values are 0 and 1\n");
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}
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}
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object_property_set_link(OBJECT(dev),
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OBJECT(pci_get_bus(&vpci_dev->pci_dev)),
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"primary-bus", &error_abort);
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qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
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}
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static void virtio_iommu_pci_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
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PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
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k->realize = virtio_iommu_pci_realize;
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set_bit(DEVICE_CATEGORY_MISC, dc->categories);
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device_class_set_props(dc, virtio_iommu_pci_properties);
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pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
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pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_IOMMU;
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pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
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pcidev_k->class_id = PCI_CLASS_OTHERS;
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dc->hotpluggable = false;
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}
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static void virtio_iommu_pci_instance_init(Object *obj)
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{
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VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(obj);
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virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
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TYPE_VIRTIO_IOMMU);
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}
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static const VirtioPCIDeviceTypeInfo virtio_iommu_pci_info = {
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.base_name = TYPE_VIRTIO_IOMMU_PCI,
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.generic_name = "virtio-iommu-pci",
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.transitional_name = "virtio-iommu-pci-transitional",
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.non_transitional_name = "virtio-iommu-pci-non-transitional",
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.instance_size = sizeof(VirtIOIOMMUPCI),
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.instance_init = virtio_iommu_pci_instance_init,
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.class_init = virtio_iommu_pci_class_init,
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};
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static void virtio_iommu_pci_register(void)
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{
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virtio_pci_types_register(&virtio_iommu_pci_info);
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}
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type_init(virtio_iommu_pci_register)
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