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[PATCH 2/3] virtio-pci: implement iommu_enabled()
From: |
Jason Wang |
Subject: |
[PATCH 2/3] virtio-pci: implement iommu_enabled() |
Date: |
Wed, 4 Aug 2021 11:48:02 +0800 |
This patch implements the PCI transport version of iommu_enabled. This
is done by comparing the address space returned by
pci_device_iommu_address_space() against address_space_memory.
Note that an ideal approach is to use pci_device_iommu_address_space()
in get_dma_as(), but it might not work well since the IOMMU could be
initialized after the virtio-pci device is initialized.
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
hw/virtio/virtio-pci.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index b321604d9b..050af2517b 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1110,6 +1110,19 @@ static AddressSpace *virtio_pci_get_dma_as(DeviceState
*d)
return pci_get_address_space(dev);
}
+static bool virtio_pci_iommu_enabled(DeviceState *d)
+{
+ VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
+ PCIDevice *dev = &proxy->pci_dev;
+ AddressSpace *dma_as = pci_device_iommu_address_space(dev);
+
+ if (dma_as == &address_space_memory) {
+ return false;
+ }
+
+ return true;
+}
+
static bool virtio_pci_queue_enabled(DeviceState *d, int n)
{
VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
@@ -2173,6 +2186,7 @@ static void virtio_pci_bus_class_init(ObjectClass *klass,
void *data)
k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled;
k->ioeventfd_assign = virtio_pci_ioeventfd_assign;
k->get_dma_as = virtio_pci_get_dma_as;
+ k->iommu_enabled = virtio_pci_iommu_enabled;
k->queue_enabled = virtio_pci_queue_enabled;
}
--
2.25.1