The new pci_ats_supported() function checks if a device supports ATS and
is allowed to use it.
Signed-off-by: Jean-Philippe Brucker <jean-phili...@linaro.org>
---
drivers/iommu/arm-smmu-v3.c | 18 +++---------------
1 file changed, 3 insertions(+), 15 deletions(-)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 034ad9671b83..bd2cfd946a36 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -2577,26 +2577,14 @@ static void arm_smmu_install_ste_for_dev(struct
arm_smmu_master *master)
}
}
-#ifdef CONFIG_PCI_ATS
static bool arm_smmu_ats_supported(struct arm_smmu_master *master)
{
- struct pci_dev *pdev;
+ struct device *dev = master->dev;
struct arm_smmu_device *smmu = master->smmu;
- struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(master->dev);
-
- if (!(smmu->features & ARM_SMMU_FEAT_ATS) || !dev_is_pci(master->dev) ||
- !(fwspec->flags & IOMMU_FWSPEC_PCI_RC_ATS) || pci_ats_disabled())
- return false;
- pdev = to_pci_dev(master->dev);
- return !pdev->untrusted && pdev->ats_cap;
+ return (smmu->features & ARM_SMMU_FEAT_ATS) && dev_is_pci(dev) &&
+ pci_ats_supported(to_pci_dev(dev));
}
-#else
-static bool arm_smmu_ats_supported(struct arm_smmu_master *master)
-{
- return false;
-}
-#endif
static void arm_smmu_enable_ats(struct arm_smmu_master *master)
{
--
2.25.0
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