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| author | Jacob Pan <jacob.jun.pan@linux.intel.com> | 2020-05-16 14:20:53 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-05-18 15:37:25 +0200 |
| commit | 76fdd6c59532630559a2c63e8645a7033f9623c4 (patch) | |
| tree | c816d2ee812c414d53965c26d3e24029799cab18 /drivers/iommu | |
| parent | e85bb99b79ca5ad2681612a7bb22f94cc2c71866 (diff) | |
| download | linux-76fdd6c59532630559a2c63e8645a7033f9623c4.tar.bz2 | |
iommu/vt-d: Report SVA feature with generic flag
Query Shared Virtual Address/Memory capability is a generic feature.
SVA feature check is the required first step before calling
iommu_sva_bind_device().
VT-d checks SVA feature enabling at per IOMMU level during this step,
SVA bind device will check and enable PCI ATS, PRS, and PASID capabilities
at device level.
This patch reports Intel SVM as SVA feature such that generic code
(e.g. 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>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20200516062101.29541-11-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index a13b723ca38d..ed7de7420b3c 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -5944,6 +5944,14 @@ 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); + + return info && (info->iommu->flags & VTD_FLAG_SVM_CAPABLE) && + info->pasid_supported && info->pri_supported && + info->ats_supported; + } + return false; } @@ -5953,6 +5961,16 @@ 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_SVA) { + struct device_domain_info *info = get_domain_info(dev); + + if (!info) + return -EINVAL; + + if (info->iommu->flags & VTD_FLAG_SVM_CAPABLE) + return 0; + } + return -ENODEV; } |