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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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4
hw/virtio/virtio-pci.h
View file

@ -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;