This patch adds the support to get the pasid table for a mediated device. The assumption is that each mediated device is a minimal assignable set of a physical PCI device. Hence, we should use the pasid table of the parent PCI device to manage the translation.
Cc: Ashok Raj <[email protected]> Cc: Jacob Pan <[email protected]> Cc: Kevin Tian <[email protected]> Cc: Liu Yi L <[email protected]> Signed-off-by: Lu Baolu <[email protected]> --- drivers/iommu/intel-pasid.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/intel-pasid.c b/drivers/iommu/intel-pasid.c index 1195c2a..9b4d462 100644 --- a/drivers/iommu/intel-pasid.c +++ b/drivers/iommu/intel-pasid.c @@ -129,7 +129,19 @@ int intel_pasid_alloc_table(struct device *dev) int ret, order; info = dev->archdata.iommu; - if (WARN_ON(!info || !dev_is_pci(dev) || info->pasid_table)) + if (WARN_ON(!info || info->pasid_table)) + return -EINVAL; + + /* Use parent PCI device pasid table for mdev: */ + if (dev_is_mdev(dev)) { + pasid_table = intel_pasid_get_table(dev_mdev_parent(dev)); + if (pasid_table) + goto attach_out; + else + return -ENOMEM; + } + + if (WARN_ON(!dev_is_pci(dev))) return -EINVAL; /* DMA alias device already has a pasid table, use it: */ @@ -190,7 +202,7 @@ void intel_pasid_free_table(struct device *dev) int i, max_pde; info = dev->archdata.iommu; - if (!info || !dev_is_pci(dev) || !info->pasid_table) + if (!info || !info->pasid_table) return; pasid_table = info->pasid_table; -- 2.7.4 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
