[08/11] iommu/vt-d: Use pci_ats_supported()
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Message ID 20200213165049.508908-9-jean-philippe@linaro.org
State New
Headers show
Series
  • PCI/ATS: Device-tree support and other improvements
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Commit Message

Jean-Philippe Brucker Feb. 13, 2020, 4:50 p.m. UTC
The pci_ats_supported() function checks if a device supports ATS and is
allowed to use it.

Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
 drivers/iommu/intel-iommu.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

Patch
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diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 9dc37672bf89..668f1b99111b 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1449,8 +1449,7 @@  static void iommu_enable_dev_iotlb(struct device_domain_info *info)
 	    !pci_reset_pri(pdev) && !pci_enable_pri(pdev, 32))
 		info->pri_enabled = 1;
 #endif
-	if (!pdev->untrusted && info->ats_supported &&
-	    pci_ats_page_aligned(pdev) &&
+	if (info->ats_supported && pci_ats_page_aligned(pdev) &&
 	    !pci_enable_ats(pdev, VTD_PAGE_SHIFT)) {
 		info->ats_enabled = 1;
 		domain_update_iotlb(info->domain);
@@ -2611,10 +2610,8 @@  static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
 	if (dev && dev_is_pci(dev)) {
 		struct pci_dev *pdev = to_pci_dev(info->dev);
 
-		if (!pdev->untrusted &&
-		    !pci_ats_disabled() &&
-		    ecap_dev_iotlb_support(iommu->ecap) &&
-		    pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ATS) &&
+		if (ecap_dev_iotlb_support(iommu->ecap) &&
+		    pci_ats_supported(pdev) &&
 		    dmar_find_matched_atsr_unit(pdev))
 			info->ats_supported = 1;