Re: [PATCH 1/2] iommu/vt-d: report SVA feature with generic flag

[Jacob Pan]

Please ignore this one, use "[PATCH 1/2] iommu/vt-d: Report SVA feature
with generic flag" instead. Sorry about the noise.

On Mon, 24 Feb 2020 15:26:35 -0800
Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx> wrote:

> Query Shared Virtual Address/Memory capability is a generic feature.
> Report Intel SVM as SVA feature such that generic code such as Uacce
> [1] can use it.
> [1] https://lkml.org/lkml/2020/1/15/604
> 
> Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
> ---
>  drivers/iommu/intel-iommu.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 92c2f2e4197b..5eca6e10d2a4 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -6346,9 +6346,14 @@ intel_iommu_dev_has_feat(struct device *dev,
> enum iommu_dev_features feat) static int
>  intel_iommu_dev_enable_feat(struct device *dev, enum
> iommu_dev_features feat) {
> +	struct intel_iommu *intel_iommu = dev_to_intel_iommu(dev);
> +
>  	if (feat == IOMMU_DEV_FEAT_AUX)
>  		return intel_iommu_enable_auxd(dev);
>  
> +	if (feat == IOMMU_DEV_FEAT_SVA)
> +		return intel_iommu->flags & VTD_FLAG_SVM_CAPABLE;
> +
>  	return -ENODEV;
>  }
>  

[Jacob Pan]