From e3560ee4cfb29e232ea99ff9adfaa8ac5b414345 Mon Sep 17 00:00:00 2001 From: Jon Derrick Date: Tue, 21 Jan 2020 06:37:49 -0700 Subject: [PATCH] iommu/vt-d: Remove VMD child device sanity check Remove the sanity check required for VMD child devices. The new pci_real_dma_dev() DMA alias mechanism places them in the same IOMMU group as the VMD endpoint. Assignment of the group would require assigning the VMD endpoint, where unbinding the VMD endpoint removes the child device domain from the hierarchy. Link: https://lore.kernel.org/r/1579613871-301529-6-git-send-email-jonathan.derrick@intel.com Signed-off-by: Jon Derrick Signed-off-by: Bjorn Helgaas Acked-by: Lu Baolu --- drivers/iommu/intel-iommu.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 72f26e828124..7e2c492f314f 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -774,15 +774,7 @@ static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devf if (dev_is_pci(dev)) { struct pci_dev *pf_pdev; - pdev = to_pci_dev(dev); - -#ifdef CONFIG_X86 - /* VMD child devices currently cannot be handled individually */ - if (is_vmd(pdev->bus)) - return NULL; -#endif - - pdev = pci_real_dma_dev(pdev); + pdev = pci_real_dma_dev(to_pci_dev(dev)); /* VFs aren't listed in scope tables; we need to look up * the PF instead to find the IOMMU. */ -- 2.20.1