diff options
| author | Jean-Philippe Brucker <jean-philippe@linaro.org> | 2021-04-01 18:47:13 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2021-04-07 11:54:29 +0300 |
| commit | 9003351cb6bde752de774e6ec874109493413152 (patch) | |
| tree | ee6cf6b38dfc6a7ed1ea120e41f99384179ea00f /drivers/iommu | |
| parent | 34b48c704d194738eef0893aa06e412bdc8a972f (diff) | |
| download | linux-9003351cb6bde752de774e6ec874109493413152.tar.xz | |
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>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel/iommu.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index be5ea16ca26f..1ea0f0bd6973 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -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); |