With the built-in topology description in place, x86 platforms can now
use the virtio-iommu.

Architectures that use the generic iommu_dma_ops should normally select
CONFIG_IOMMU_DMA themselves (from arch/*/Kconfig). Since not all x86
drivers have been converted yet, it's currently up to the IOMMU Kconfig
to select it.

Signed-off-by: Jean-Philippe Brucker <jean-phili...@linaro.org>
---
 drivers/iommu/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index 98d28fdbc19a..d7cf158745eb 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -383,8 +383,9 @@ config HYPERV_IOMMU
 config VIRTIO_IOMMU
        tristate "Virtio IOMMU driver"
        depends on VIRTIO
-       depends on ARM64
+       depends on (ARM64 || X86)
        select IOMMU_API
+       select IOMMU_DMA if X86
        select INTERVAL_TREE
        help
          Para-virtualised IOMMU driver with virtio.
-- 
2.28.0

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