iommu/vt-d: Disable PCI ATS in legacy passthrough mode

jira LE-1907
Rebuild_History Non-Buildable kernel-5.14.0-427.18.1.el9_4
commit-author Lu Baolu <baolu.lu@linux.intel.com>
commit da37ddd

When IOMMU hardware operates in legacy mode, the TT field of the context
entry determines the translation type, with three supported types (Section
9.3 Context Entry):

- DMA translation without device TLB support
- DMA translation with device TLB support
- Passthrough mode with translated and translation requests blocked

Device TLB support is absent when hardware is configured in passthrough
mode.

Disable the PCI ATS feature when IOMMU is configured for passthrough
translation type in legacy (non-scalable) mode.

Fixes: 0faa19a ("iommu/vt-d: Decouple PASID & PRI enabling from SVA")
	Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
	Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20231114011036.70142-3-baolu.lu@linux.intel.com
	Signed-off-by: Joerg Roedel <jroedel@suse.de>
(cherry picked from commit da37ddd)
	Signed-off-by: Jonathan Maple <jmaple@ciq.com>

Author: PlaidCat

drivers/iommu/intel/iommu.c

@@ -2487,7 +2487,8 @@ static int dmar_domain_attach_device(struct dmar_domain *domain,
 		return ret;
 	}
 
-	iommu_enable_pci_caps(info);
+	if (sm_supported(info->iommu) || !domain_type_is_si(info->domain))
+		iommu_enable_pci_caps(info);
 
 	return 0;
 }