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iommu/vt-d: Support IOMMU_DEV_FEAT_IOPF 

Allow drivers to query and enable IOMMU_DEV_FEAT_IOPF, which amounts to
checking whether PRI is enabled.

Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Link: https://lore.kernel.org/r/20210401154718.307519-5-jean-philippe@linaro.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jean-Philippe Brucker 2021-04-01 17:47:13 +02:00 committed by Joerg Roedel
parent 34b48c704d
commit 9003351cb6
1 changed files with 8 additions and 3 deletions
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11
drivers/iommu/intel/iommu.c
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@ -5311,6 +5311,8 @@ static int siov_find_pci_dvsec(struct pci_dev *pdev)
static bool
intel_iommu_dev_has_feat(struct device *dev, enum iommu_dev_features feat)
{
struct device_domain_info *info = get_domain_info(dev);
if (feat == IOMMU_DEV_FEAT_AUX) {
int ret;
@ -5325,13 +5327,13 @@ intel_iommu_dev_has_feat(struct device *dev, enum iommu_dev_features feat)
return !!siov_find_pci_dvsec(to_pci_dev(dev));
}
if (feat == IOMMU_DEV_FEAT_SVA) {
struct device_domain_info *info = get_domain_info(dev);
if (feat == IOMMU_DEV_FEAT_IOPF)
return info && info->pri_supported;
if (feat == IOMMU_DEV_FEAT_SVA)
return info && (info->iommu->flags & VTD_FLAG_SVM_CAPABLE) &&
info->pasid_supported && info->pri_supported &&
info->ats_supported;
}
return false;
}
@ -5342,6 +5344,9 @@ intel_iommu_dev_enable_feat(struct device *dev, enum iommu_dev_features feat)
if (feat == IOMMU_DEV_FEAT_AUX)
return intel_iommu_enable_auxd(dev);
if (feat == IOMMU_DEV_FEAT_IOPF)
return intel_iommu_dev_has_feat(dev, feat) ? 0 : -ENODEV;
if (feat == IOMMU_DEV_FEAT_SVA) {
struct device_domain_info *info = get_domain_info(dev);