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

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On Tue, Mar 16, 2021 at 08:16:54PM +0100, Jean-Philippe Brucker wrote:
> With the VIOT support in place, x86 platforms can now use the
> virtio-iommu.
> 
> The arm64 Kconfig selects IOMMU_DMA, while x86 IOMMU drivers select it
> themselves.
> 
> Signed-off-by: Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx>

Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx>

> ---
>  drivers/iommu/Kconfig | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
> index 2819b5c8ec30..ccca83ef2f06 100644
> --- a/drivers/iommu/Kconfig
> +++ b/drivers/iommu/Kconfig
> @@ -400,8 +400,9 @@ 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

Would it hurt to just select unconditionally? Seems a bit cleaner
...

>  	select INTERVAL_TREE
>  	select ACPI_VIOT if ACPI
>  	help
> -- 
> 2.30.2

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