e72cfabf4e
In theory the virtio-iommu-pci could be plugged anywhere in the PCIe topology and as long as the dt/acpi info are properly built this should work. However at the moment we fail to do that because the virtio-iommu-pci BDF is not computed at plug time and in that case vms->virtio_iommu_bdf gets an incorrect value. For instance if the virtio-iommu-pci is plugged onto a pcie root port and the virtio-iommu protects a virtio-block-pci device the guest does not boot. So let's do not pretend we do support this case and fail the initialize() if we detect the virtio-iommu-pci is plugged anywhere else than on the root bus. Anyway this ability is not needed. Signed-off-by: Eric Auger <eric.auger@redhat.com> Message-Id: <20221012163448.121368-1-eric.auger@redhat.com> Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Tested-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
113 lines
3.5 KiB
C
113 lines
3.5 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 "hw/virtio/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 "hw/qdev-properties-system.h"
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#include "qapi/error.h"
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#include "hw/boards.h"
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#include "hw/pci/pci_bus.h"
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#include "qom/object.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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DECLARE_INSTANCE_CHECKER(VirtIOIOMMUPCI, VIRTIO_IOMMU_PCI,
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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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PCIBus *pbus = pci_get_bus(&vpci_dev->pci_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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error_setg(errp, "Check your machine implements a hotplug handler "
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"for the virtio-iommu-pci device");
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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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return;
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}
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}
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if (!pci_bus_is_root(pbus)) {
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error_setg(errp, "virtio-iommu-pci must be plugged on the root bus");
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return;
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}
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object_property_set_link(OBJECT(dev), "primary-bus",
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OBJECT(pbus), &error_abort);
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virtio_pci_force_virtio_1(vpci_dev);
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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->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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.generic_name = TYPE_VIRTIO_IOMMU_PCI,
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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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