Messages in this thread Patch in this message | | | From | Jacob Pan <> | Subject | [PATCH 1/2] iommu/vt-d: report SVA feature with generic flag | Date | Mon, 24 Feb 2020 15:26:35 -0800 |
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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@linux.intel.com> --- 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; } -- 2.7.4
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