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virtio-pci: address space translation service (ATS) support

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This patches enable the Address Translation Service support for virtio
pci devices. This is needed for a guest visible Device IOTLB
implementation and will be required by vhost device IOTLB API
implementation for intel IOMMU.

Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2016-12-30 18:09:15 +08:00 • committed by Michael S. Tsirkin
parent 554f5e1604
commit 615c4ed205
5 changed files with 31 additions and 0 deletions
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7
hw/virtio/virtio-pci.c
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@ -1815,6 +1815,11 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
* PCI Power Management Interface Specification.
*/
pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3);
if (proxy->flags & VIRTIO_PCI_FLAG_ATS) {
pcie_ats_init(pci_dev, 256);
}
} else {
/*
* make future invocations of pci_is_express() return false
@ -1868,6 +1873,8 @@ static Property virtio_pci_properties[] = {
VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT, false),
DEFINE_PROP_BOOL("x-ignore-backend-features", VirtIOPCIProxy,
ignore_backend_features, false),
DEFINE_PROP_BIT("ats", VirtIOPCIProxy, flags,
VIRTIO_PCI_FLAG_ATS_BIT, false),
DEFINE_PROP_END_OF_LIST(),
};