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virtio-iommu-pci: Add array of Interval properties

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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>
This commit is contained in:
Eric Auger 2020-07-03 16:59:42 +01:00 committed by Peter Maydell
parent 0f5a3092ee
commit 8077b8e549
1 changed files with 11 additions and 0 deletions
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11
hw/virtio/virtio-iommu-pci.c
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@ -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 +58,13 @@ 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 0 and 1\n");
}
}
object_property_set_link(OBJECT(dev),
OBJECT(pci_get_bus(&vpci_dev->pci_dev)),
"primary-bus", &error_abort);