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authorJason Wang <jasowang@redhat.com>2016-12-30 18:09:15 +0800
committerMichael S. Tsirkin <mst@redhat.com>2017-01-10 05:56:59 +0200
commit615c4ed20598ab3eda5e071ba7ba2a5bf70be59f (patch)
tree28db0d008fd713671715aba171b882c41fd1f60d /hw/pci
parent554f5e16046236b264c66436870be1b4ef25c1dc (diff)
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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/pci')
-rw-r--r--hw/pci/pcie.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c
index 99cfb45..adeda04 100644
--- a/hw/pci/pcie.c
+++ b/hw/pci/pcie.c
@@ -717,3 +717,18 @@ void pcie_dev_ser_num_init(PCIDevice *dev, uint16_t offset, uint64_t ser_num)
PCI_EXT_CAP_DSN_SIZEOF);
pci_set_quad(dev->config + offset + pci_dsn_cap, ser_num);
}
+
+void pcie_ats_init(PCIDevice *dev, uint16_t offset)
+{
+ pcie_add_capability(dev, PCI_EXT_CAP_ID_ATS, 0x1,
+ offset, PCI_EXT_CAP_ATS_SIZEOF);
+
+ dev->exp.ats_cap = offset;
+
+ /* Invalidate Queue Depth 0, Page Aligned Request 0 */
+ pci_set_word(dev->config + offset + PCI_ATS_CAP, 0);
+ /* STU 0, Disabled by default */
+ pci_set_word(dev->config + offset + PCI_ATS_CTRL, 0);
+
+ pci_set_word(dev->wmask + dev->exp.ats_cap + PCI_ATS_CTRL, 0x800f);
+}