[PATCH 3/3] iommu/virtio: Enable x86 support

Robin Murphy
Fri, 14 Feb 2020 16:57:11 -0000

On 14/02/2020 4:04 pm, Jean-Philippe Brucker wrote:
> With the built-in topology description in place, x86 platforms can now
> use the virtio-iommu.
>
> Signed-off-by: Jean-Philippe Brucker <jean-philippe at linaro.org>
> ---
>   drivers/iommu/Kconfig | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
> index 068d4e0e3541..adcbda44d473 100644
> --- a/drivers/iommu/Kconfig
> +++ b/drivers/iommu/Kconfig
> @@ -508,8 +508,9 @@ config HYPERV_IOMMU
>   config VIRTIO_IOMMU
>   	bool "Virtio IOMMU driver"
>   	depends on VIRTIO=y
> -	depends on ARM64
> +	depends on (ARM64 || X86)
>   	select IOMMU_API
> +	select IOMMU_DMA

Can that have an "if X86" for clarity? AIUI it's not necessary for
virtio-iommu itself (and really shouldn't be), but is merely to satisfy
the x86 arch code's expectation that IOMMU drivers bring their own DMA
ops, right?

Robin.

>   	select INTERVAL_TREE
>   	help
>   	  Para-virtualised IOMMU driver with virtio.
>