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| author | Jason Wang <jasowang@redhat.com> | 2016-12-30 18:09:15 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2017-01-10 05:56:59 +0200 |
| commit | 615c4ed20598ab3eda5e071ba7ba2a5bf70be59f (patch) | |
| tree | 28db0d008fd713671715aba171b882c41fd1f60d /hw/virtio | |
| parent | 554f5e16046236b264c66436870be1b4ef25c1dc (diff) | |
| download | focaccia-qemu-615c4ed20598ab3eda5e071ba7ba2a5bf70be59f.tar.gz focaccia-qemu-615c4ed20598ab3eda5e071ba7ba2a5bf70be59f.zip | |
virtio-pci: address space translation service (ATS) support
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>
Diffstat (limited to 'hw/virtio')
| -rw-r--r-- | hw/virtio/virtio-pci.c | 7 | ||||
| -rw-r--r-- | hw/virtio/virtio-pci.h | 4 |
2 files changed, 11 insertions, 0 deletions
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 213d57e9fe..854b8f22bf 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -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(), }; diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h index 5e078866c4..d00064cc0c 100644 --- a/hw/virtio/virtio-pci.h +++ b/hw/virtio/virtio-pci.h @@ -72,6 +72,7 @@ enum { VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT, VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT, VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT, + VIRTIO_PCI_FLAG_ATS_BIT, }; /* Need to activate work-arounds for buggy guests at vmstate load. */ @@ -96,6 +97,9 @@ enum { #define VIRTIO_PCI_FLAG_PAGE_PER_VQ \ (1 << VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT) +/* address space translation service */ +#define VIRTIO_PCI_FLAG_ATS (1 << VIRTIO_PCI_FLAG_ATS_BIT) + typedef struct { MSIMessage msg; int virq; |