| Message ID | 1579613871-301529-6-git-send-email-jonathan.derrick@intel.com |
|---|---|
| State | New |
| Headers | show |
| Series | Clean up VMD DMA Map Ops | expand |
On 1/21/20 9:37 PM, Jon Derrick wrote: > This removes 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. > > Signed-off-by: Jon Derrick<jonathan.derrick@intel.com> Acked-by: Lu Baolu <baolu.lu@linux.intel.com> Thanks, baolu
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 72f26e8..7e2c492f 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. */
This removes 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. Signed-off-by: Jon Derrick <jonathan.derrick@intel.com> --- drivers/iommu/intel-iommu.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-)